Some standard content:
Mechanical Industry Standard of the People's Republic of China
High-speed involute cylindrical gearbox
1 Subject content and scope of application
JB/T 7514-94
This standard specifies the product classification, technical requirements, test methods and inspection rules, marking, packaging and storage and transportation of GS series high-speed involute cylindrical gearboxes (hereinafter referred to as gearboxes). This standard is applicable to single-stage, closed-type, parallel-axis, hardened gearboxes with pinion speeds of 1000~20000r/min and pitch circle linear speeds of not less than 25m/s, and with external spur, helical or herringbone gears. Other similar high-speed gearboxes can also refer to this standard. Cited standards
CB985Basic forms and dimensions of weld grooves for gas welding, manual electric arc blasting and gas shielded blastingGB1031
GB1095
GB 1356
GB1357
GB1569
GB 3077
GB3181
Surface roughness parameters and their values
Cross-sectional dimensions of flat keys and keyways
Basic tooth profile of involute cylindrical gears
Module of involute cylindrical gears
Cylindrical shaft extensions
Technical conditions for alloy structural steels
Standard samples of paint film colors
GB 6403.5
Grinding wheel overrun groove
GB6557
GB8539
GB8542
GB 8543
GB 9115
GB9439
GB10095
SY1230
Mechanical balancing of flexible rotors
General provisions for gear materials and heat treatment
Technical conditions for turbine gear transmission
Determination of mechanical vibration of gear units during acceptance testsWelded steel pipe flanges
Grey cast iron parts
Involute cylindrical gears
Rust-proof turbine oil
JB/ZQ4000.3General technical conditions for welded partsJB/ZQ4238Undercut groove
JB/ZQ 4290
JB/T 5078
Steel for gear and gear ring forgings
General provisions for material selection and heat treatment quality control of high-speed gears ZB/TJ17006 Calculation method for load-bearing capacity of high-speed involute cylindrical gears 3 Product classification
3.1 Assembly type
There are four types of assembly of gearboxes. The specific types are shown in Figure 1. If the user has special requirements, it shall be decided by negotiation between the production and the user. Ministry of Machinery Industry of the People's Republic of China 1994- 10-25 approved 184
1995-10-01 implementation
3.2 gearbox marking
JB/T7514---94
Figure 1 assembly type (the shaft with the rotation direction indicated is the high-speed shaft) The gearbox code includes the gearbox model, center distance, nominal transmission ratio and assembly type. Gearbox model
This standard stipulates that the gearbox model is GS, which means high-speed involute cylindrical gearbox. h.
Marking method
Marking example
Standard number
Assembly type
Nominal transmission ratio
Center distance (specification)
GS series gearbox
Center distance is 250mm+nominal transmission ratio is 6.50. The assembly type is Ⅱ, and its code is: JB/T 7514
GS250.6.50-I
3.3 Basic parameters
3.3.1 The gear module should comply with the provisions of GB1357, and its standard figure is 1.5~~10mm. TV
3.3.2 (GS series gearbox specifications are divided by the value of the center distance. The center distance should comply with the provisions of Table 1. Table 1 GS series gearbox center distance
3.3.3 GS series gearbox nominal transmission ratio = 1.0~~8.0, the actual transmission ratio should meet the user's requirements, and the allowable error is within the range of 0.5.
3.3.4 The basic tooth profile of the gear should comply with (B1356. In special cases, designers are allowed to use other involute gears. 3.4 Structural dimensions
3.4.1 The structural dimensions of GS160-GS400 gearboxes shall comply with the provisions of Figure 2 and Tables 2 and 3. 3.4.2 The structural dimensions of GS150~GS670 gearboxes shall comply with the provisions of Figure 3 and Tables 4 and 5. 185
JB/T7514—94
Oil inlet pipe method
Both sides of the oil return pipe flange
Figure 2 (GS160-~GS400 gearbox structure
JB/T 7514—94
Oil inlet pipe flange
Note: (T) Key and keyway dimensions are in accordance with GB1095, 75
4—14
Return pipe flange
2 Pipe flange dimensions are in accordance with CB9115, nominal pressure min. 0.6MPa., is the screw hole diameter (),) is the flange outer diameter of the gearbox oil inlet and return pipe. Length 3
21.003.30
>3. 30--3.70
>3.70-4. 45
2 4. 45~~ 5. 30
5.30--6.15
> 6. 15~-7. 00
21.00~3.55
3. 55~- 4. 53
1. 55-- 5. 20
5. 20~5. 95
>5. 95--6. 82
6. 82 -- 7. 50
tt | 00~~3. 50
>3.50~~4. 80
24. 80--6. 10
7>6. 10~6. 95
26. 05~7.85
>7. 85~8. 00
21, 00~3. 43||tt ||23. 43~~4. 00
4. 00 ~ 5. 55
25. 55 ~6. 75
26. 75~7. 80
2 7. 80 -- 8. 00
2:1. 00 ~~ 3. 10
3. 10~ 4. 50
>4.50~5.45
>5. 45 ~6. 40
>6. 40-7. 75
>7. 75~8. 00
1. 00 -- 3. 65
≥3. 65 ~4. 45
4. 45 ~3. 05
>5.05~5,90
5. 90~~ 7. 65
7. 65~8. 00
2 1. 00-~3. 38
3. 38~4. 20
4. 20-~5. 15
>5. 13 -- 6. 20
> 6. 20~-8. 00
Note: The dimensions of key and keyway shall comply with GB1095. 188
JB/T 7514
Continued Table 3
JB/T7514.94
Oil inlet pipe flange
Both sides of oil return pipe flange
Figure 3GS450~GS670 gearbox structure
11·45
30j1380
15601465
160011520
670!
370121
1351268
79414901280
1 8551515
1950520320
2 5.51 -
77533513020032
355130200
875|390150|20036
915!400150:200361710
940415/15020036725
965425 || tt||990435
170240
170|240|40785
JB/T 751494
6908651191
Weight/kg
Oil inlet pipe flange
110110
190/150
190150
80 |190|150
029460[1%0
2002路0
Oil return pipe law industry
Note: (1) The dimensions of key and keyway shall comply with GB1093. (2) Pipe flange dimensions are in accordance with GB9115. p0.6MPud is the bolt hole diameter. When 27.00, the structural dimensions shall be announced by the manufacturer and agreed upon by the user. Agreed.
(D)D)I, D), are the outer diameters of the flanges of the gearbox oil inlet and return pipes. Table 5
21.00~3.90
3.90~4.85
>4.85~~5.51
25.515.70
>5. 70~-6 . 40
≥6. 40~~7. 00
21. 00-3.90
23. 90~-4. 50
4. 50~5. 51
5. 51~ 6. 50
2 6. 50~-7. 00
Quality/kg
Anchor bolt hole
3 ：42
1, 00 ~3. 92
3. 92~~5. 00
73. 00-5. 51
25. 51~6. 15
6. 13~- 7. 00
221- 00-~3. 92
>3. 92 - 5. 00
25. 00~5. 51
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4. 75
4. 75~5 . 51
>5. 51~-6. 55
76.55--7.00
21. 004. 42
24. 42~-4. 92
≥4. 92 ~~5. 51||tt ||25.51~6.33
≥6.33~7.00
21.00~4.42
*4.42--4.92
- 4.92-5. 51
>5. 51~6. 33
6. 33~7. 00
Note: () Key and keyway dimensions are in accordance with GB1095 JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical requirements
General requirements
4.1.1 Gearbox The design and manufacturing must follow the following principles: Under the specified operating conditions, it can operate normally for three years. 4.1.2 The gearbox should operate safely within the specified value of the maximum speed limit of the connected unit. b
4.2 Gearbox Body
4.2.1 The gearbox body is a cast or welded structure. When using a casting structure, the mechanical properties of cast iron should not be lower than the performance requirements of gray cast iron HT250 in GB9439, and stress relief treatment should be carried out after casting; when using a welded structure, the material should be carbon with a tensile strength of not less than 375N/mm\ For plain structural steel or low alloy structural steel, the basic type and basic size of the welding slope [I shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box shall comply with the technical requirements of JB/ZQ4000.3. 4.2.2 The box should generally be tested for kerosene leakage and no leakage should be found. 4.2.3 The upper and lower boxes should be tightly closed after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to insert a feeler gauge at the center joint surface. The man-portion shall not exceed one third of the width of the joint surface. No oil shall seep from any joint surface of the box. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat. Smooth and clean. Except for the user's requirements, the inside of the box shall not have permanent coating or paint. The paint on the outer surface of the box shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, miss or peel. There is no rust or scratch on the surface.
4.2.6 Two locating pins are usually used to locate the joint surface between the housing and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2. 7 Gearboxes should generally be equipped with ventilation devices, which should comply with the provisions of 2.2.2.8 of GB8512. 4.2.8 Gearboxes should be equipped with inspection holes and 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to the gear geometry, material, process, precision and other specific conditions in accordance with ZB/TJ17006. Appendix A (Supplement) provides the gearbox power rating table (gears are carburized and fire treated). The safety factor of the gear should meet the user's requirements, or be determined by the designer and the user after consultation, with a failure probability of less than 1 The reference value of the minimum safety factor is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 grades specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear materials
4.3.4.1 Gear Alloy structural steel shall be used. The material selection principle and quality control shall be in accordance with B/T5078. Its chemical composition and mechanical properties shall comply with GB3077 or J3/ZQ4290. When the steel grade is different, GB3077 shall prevail. 4.3.4.2 Gears shall be Carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall be in accordance with JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Especially important gears shall be carried out in accordance with ME grade. ||tt| |4.3.4.4 The small gear and the shaft should generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft adopt an interference fit structure. It should be ensured that it does not loosen in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth shape and tooth direction need to be modified. The tooth shape and tooth direction should meet the design requirements. |tt||4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru =). 8 μm 4.5 Dynamic characteristics || tt || 4.5.1 The gear rotor should be analyzed for lateral critical speed, and the analysis should be considered as elastic support. 4.5.2 The gear rotor should be analyzed for all After the parts are assembled, they must be subjected to a dynamic balancing test together. The test method is as follows (136557). The residual unbalance shall comply with the requirements of 2.2.6.2 of G138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of G38543. 4.5.3.2 Vibration measurement on the gear journal When measuring the vibration of the gear housing L, the sensor should be installed as close to the bearing seat as possible, and the limit value should be the subjective evaluation value B in Appendix C of GB8543 or the value determined by the manufacturer. The factory and the user shall agree on this.
4.5.3.3 The noise level assessment of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft Seal
Bearing box and shaft seal should comply with (38542 2.2.8 192200361710
940415/15020036725
965425
990435
170240
170|240|40785
JB/T 751494
6908651191
Weight/kg
Oil inlet pipe flange
110110
190/150
190150
80 |190|150
029460[1%0
2002路0
Oil return pipe law industry
Note: (1) The dimensions of key and keyway shall comply with GB1093. (2) Pipe flange dimensions are in accordance with GB9115. p0.6MPud is the bolt hole diameter. When 27.00, the structural dimensions shall be announced by the manufacturer and agreed upon by the user. Agreed.
(D)D)I, D), are the outer diameters of the flanges of the gearbox oil inlet and return pipes. Table 5
21.00~3.90
3.90~4.85
>4.85~~5.51
25.515.70
>5. 70~-6 . 40
≥6. 40~~7. 00
21. 00-3.90
23. 90~-4. 50
4. 50~5. 51
5. 51~ 6. 50
2 6. 50~-7. 00
Quality/kg
Anchor bolt hole
3 ：42
1, 00 ~3. 92
3. 92~~5. 00
73. 00-5. 51
25. 51~6. 15
6. 13~- 7. 00
221- 00-~3. 92
>3. 92 - 5. 00
25. 00~5. 51
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4. 75
4. 75~5 . 51
>5. 51~-6. 55
76.55--7.00
21. 004. 42
24. 42~-4. 92
≥4. 92 ~~5. 51||tt ||25.51~6.33
≥6.33~7.00
21.00~4.42
*4.42--4.92
- 4.92-5. 51
>5. 51~6. 33
6. 33~7. 00
Note: () Key and keyway dimensions are in accordance with GB1095 JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical requirements
General requirements
4.1.1 Gearbox The design and manufacturing must follow the following principles: Under the specified operating conditions, it can operate normally for three years. 4.1.2 The gearbox should operate safely within the specified value of the maximum speed limit of the connected unit. b
4.2 Gearbox Body
4.2.1 The gearbox body is a cast or welded structure. When using a casting structure, the mechanical properties of cast iron should not be lower than the performance requirements of gray cast iron HT250 in GB9439, and stress relief treatment should be carried out after casting; when using a welded structure, the material should be carbon with a tensile strength of not less than 375N/mm\ For plain structural steel or low alloy structural steel, the basic type and basic size of the welding slope [I shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box shall comply with the technical requirements of JB/ZQ4000.3. 4.2.2 The box should generally be tested for kerosene leakage and no leakage should be found. 4.2.3 The upper and lower boxes should be tightly closed after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to insert a feeler gauge at the center joint surface. The man-portion shall not exceed one third of the width of the joint surface. No oil shall seep from any joint surface of the box. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat. Smooth and clean. Except for the user's requirements, the inside of the box shall not have permanent coating or paint. The paint on the outer surface of the box shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, miss or peel. There is no rust or scratch on the surface.
4.2.6 Two locating pins are usually used to locate the joint surface between the housing and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2. 7 Gearboxes should generally be equipped with ventilation devices, which should comply with the provisions of 2.2.2.8 of GB8512. 4.2.8 Gearboxes should be equipped with inspection holes and 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to the gear geometry, material, process, precision and other specific conditions in accordance with ZB/TJ17006. Appendix A (Supplement) provides the gearbox power rating table (gears are carburized and fire treated). The safety factor of the gear should meet the user's requirements, or be determined by the designer and the user after consultation, with a failure probability of less than 1 The reference value of the minimum safety factor is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 grades specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear materials
4.3.4.1 Gear Alloy structural steel shall be used. The material selection principle and quality control shall be in accordance with B/T5078. Its chemical composition and mechanical properties shall comply with GB3077 or J3/ZQ4290. When the steel grade is different, GB3077 shall prevail. 4.3.4.2 Gears shall be Carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall be in accordance with JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Especially important gears shall be carried out in accordance with ME grade. ||tt| |4.3.4.4 The small gear and the shaft should generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft adopt an interference fit structure. It should be ensured that it does not loosen in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth shape and tooth direction need to be modified. The tooth shape and tooth direction should meet the design requirements. |tt||4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru =). 8 μm 4.5 Dynamic characteristics || tt || 4.5.1 The gear rotor should be analyzed for lateral critical speed, and the analysis should be considered as elastic support. 4.5.2 The gear rotor should be analyzed for all After the parts are assembled, they must be subjected to a dynamic balancing test together. The test method is as follows (136557). The residual unbalance shall comply with the requirements of 2.2.6.2 of G138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of G38543. 4.5.3.2 Vibration measurement on the gear journal When measuring the vibration of the gear housing L, the sensor should be installed as close to the bearing seat as possible, and the limit value should be the subjective evaluation value B in Appendix C of GB8543 or the value determined by the manufacturer. The factory and the user shall agree on this.
4.5.3.3 The noise level assessment of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft Seal
Bearing box and shaft seal should comply with (38542 2.2.8 192200361710
940415/15020036725
965425
990435
170240
170|240|40785
JB/T 751494
6908651191
Weight/kg
Oil inlet pipe flange
110110
190/150
190150
80 |190|150
029460[1%0
2002路0
Oil return pipe law industry
Note: (1) The dimensions of key and keyway shall comply with GB1093. (2) Pipe flange dimensions are in accordance with GB9115. p0.6MPud is the bolt hole diameter. When 27.00, the structural dimensions shall be announced by the manufacturer and agreed upon by the user. Agreed.
(D)D)I, D), are the outer diameters of the flanges of the gearbox oil inlet and return pipes. Table 5
21.00~3.90
3.90~4.85
>4.85~~5.51
25.515.70
>5. 70~-6 . 40
≥6. 40~~7. 00
21. 00-3.90
23. 90~-4. 50
4. 50~5. 51
5. 51~ 6. 50
2 6. 50~-7. 00
Quality/kg
Anchor bolt hole
3 ：42
1, 00 ~3. 92
3. 92~~5. 00
73. 00-5. 51
25. 51~6. 15
6. 13~- 7. 00
221- 00-~3. 92
>3. 92 - 5. 00
25. 00~5. 51
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4. 75
4. 75~5 . 51
>5. 51~-6. 55
76.55--7.00
21. 004. 42
24. 42~-4. 92
≥4. 92 ~~5. 51||tt ||25.51~6.33
≥6.33~7.00
21.00~4.42
*4.42--4.92
- 4.92-5. 51
>5. 51~6. 33
6. 33~7. 00
Note: () Key and keyway dimensions are in accordance with GB1095 JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical requirements
General requirements
4.1.1 Gearbox The design and manufacturing must follow the following principles: Under the specified operating conditions, it can operate normally for three years. 4.1.2 The gearbox should operate safely within the specified value of the maximum speed limit of the connected unit. b
4.2 Gearbox Body
4.2.1 The gearbox body is a cast or welded structure. When using a casting structure, the mechanical properties of cast iron should not be lower than the performance requirements of gray cast iron HT250 in GB9439, and stress relief treatment should be carried out after casting; when using a welded structure, the material should be carbon with a tensile strength of not less than 375N/mm\ For plain structural steel or low alloy structural steel, the basic type and basic size of the welding slope [I shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box shall comply with the technical requirements of JB/ZQ4000.3. 4.2.2 The box should generally be tested for kerosene leakage and no leakage should be found. 4.2.3 The upper and lower boxes should be tightly closed after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to insert a feeler gauge at the center joint surface. The man-portion shall not exceed one third of the width of the joint surface. No oil shall seep from any joint surface of the box. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat. Smooth and clean. Except for the user's requirements, the inside of the box shall not have permanent coating or paint. The paint on the outer surface of the box shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, miss or peel. There is no rust or scratch on the surface.
4.2.6 Two locating pins are usually used to locate the joint surface between the housing and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2. 7 Gearboxes should generally be equipped with ventilation devices, which should comply with the provisions of 2.2.2.8 of GB8512. 4.2.8 Gearboxes should be equipped with inspection holes and 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to the gear geometry, material, process, precision and other specific conditions in accordance with ZB/TJ17006. Appendix A (Supplement) provides the gearbox power rating table (gears are carburized and fire treated). The safety factor of the gear should meet the user's requirements, or be determined by the designer and the user after consultation, with a failure probability of less than 1 The reference value of the minimum safety factor is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 grades specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear materials
4.3.4.1 Gear Alloy structural steel shall be used. The material selection principle and quality control shall be in accordance with B/T5078. Its chemical composition and mechanical properties shall comply with GB3077 or J3/ZQ4290. When the steel grade is different, GB3077 shall prevail. 4.3.4.2 Gears shall be Carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall be in accordance with JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Especially important gears shall be carried out in accordance with ME grade. ||tt| |4.3.4.4 The small gear and the shaft should generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft adopt an interference fit structure. It should be ensured that it does not loosen in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth shape and tooth direction need to be modified. The tooth shape and tooth direction should meet the design requirements. |tt||4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru =). 8 μm 4.5 Dynamic characteristics || tt || 4.5.1 The gear rotor should be analyzed for lateral critical speed, and the analysis should be considered as elastic support. 4.5.2 The gear rotor should be analyzed for lateral critical speed, and the gear rotor should be analyzed for lateral critical speed. After the parts are assembled, they must be subjected to a dynamic balancing test together. The test method is as follows (136557). The residual unbalance shall comply with the requirements of 2.2.6.2 of G138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of G38543. 4.5.3.2 Vibration measurement on the gear journal When measuring the vibration of the gear housing L, the sensor should be installed as close to the bearing seat as possible, and the limit value should be the subjective evaluation value B in Appendix C of GB8543 or the value determined by the manufacturer. The factory and the user shall agree on this.
4.5.3.3 The noise level assessment of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft Seal
Bearing box and shaft seal should comply with (38542 2.2.8 1928 Regulations 1928 Regulations 19200, the structural dimensions shall be determined by the manufacturer and the user through negotiation. (D) D) I, D) are the outer diameters of the flanges of the gearbox oil inlet and return pipes. Table 5
21.00~3. 90
3.90~4.85
>4.85~~5.51
25.515.70
>5. 70~-6. 40
≥6. 40~~7. 00
21. 00-3.90|| tt | 92 | 00~5. 51
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4. 75
4. 75~5. 51
>5. 51~-6 55
76.55--7.00
21. 004. 42
24. 42~-4. 92
≥4. 92 ~~5. 51
25. 51~6. 33
≥6. 33~7. 00
21.00~4.42
*4. 42--4. 92
-4.92-5. 51
>5. 51~6. 33
6. 33~7. 00
Note: () Key and keyway dimensions are in accordance with GB1095 JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical requirements
General requirements
4.1.1 The design and manufacture of the gearbox must follow the following principles: Under the specified operating conditions, it can operate normally for three years. 4.1.2 The gearbox should operate safely within the specified value of the maximum speed limit of the connected unit. b
4.2 Box
4.2.1 The gearbox box is a cast structure or a welded structure. When using a casting structure, the mechanical properties of cast iron shall not be lower than the performance requirements of medium gray cast iron HT250 in GB9439, and stress relief treatment shall be carried out after casting; when using a welded structure, the material shall be carbon structural steel or low alloy structural steel with a tensile strength of not less than 375N/mm\, and the basic type and basic size of the welding slope shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box body shall meet the technical requirements of JB/ZQ4000.3. 4.2.2 The box body shall generally be tested for kerosene leakage, and no leakage shall be found. 4.2.3 The upper and lower boxes shall be tightly fitted after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to plug the center joint surface, and the plugged part shall not exceed one-third of the width of the joint surface. No joint surface of the box body shall leak oil. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange by (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat and smooth. Except for the user's requirements, the inside of the box body shall not be coated with permanent coating or paint. The paint on the outer surface of the box body shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, leak or peel. There shall be no rust, scratches or other phenomena on the surface.
4.2.6 The joint surface between the box body and the base is generally located with two locating pins. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2.7 The gearbox should generally be equipped with a ventilation device, which should comply with the provisions of 2.2.2.8 in GB8512. 4.2.8 The gearbox should be equipped with an inspection hole and a starter hole. Lifting lug (hole). 4.3 Gearbzxz.net
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to ZB/TJ17006 based on the gear geometry, material, process, precision and other specific conditions. Appendix A (supplement) of this standard provides a gearbox power rating table (the gear is carburized and ignited). The safety factor of the gear shall meet the user's requirements, or be determined by consultation between the designer and the user. The reference value of the minimum safety factor when the failure probability is less than 1 time is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with grades 4 to 6 specified in GB10095. 4.3.3 The gear tooth surface roughness shall be in accordance with GB1031.Ra0.8um. 4.3.4 Gear material
4.3.4.1 Gear Alloy structural steel should be used, and the material selection principles and quality control shall comply with the provisions of B/T5078. Its chemical composition and mechanical properties shall comply with the provisions of GB3077 or J3/ZQ4290. When the steel grades are similar, GB3077 shall prevail. 4.3.4.2 The gears shall be subjected to carburizing, nitriding or similar heat treatments. 4.3.4.3 The quality control of gear materials and heat treatment shall comply with the provisions of JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Particularly important gears shall be inspected according to ME grade.
4.3.4.4 The small gear and the shaft shall generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft shall adopt an interference fit structure, and the interference fit It should be ensured that there is no looseness in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth profile and tooth direction need to be modified. The tooth profile and tooth direction inspection should meet the design requirements.
4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru=).8μm 4.5 Dynamic characteristics
4.5.1 The gear rotor should be subjected to lateral critical speed analysis, and the elastic support should be considered during the analysis. 4.5.2 The gear rotor must be subjected to a dynamic balancing test after all parts are assembled. The test method is carried out according to (136557. The residual unbalance shall comply with the requirements of 2.2.6.2 of GB138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of GB38543. 4.5.3.2 When measuring the vibration on the gear journal, the limit value shall comply with the provisions of GB8512 2.2.6.3; when measuring the vibration of the gearbox body L, the sensor shall be installed as close to the bearing seat as possible, and the limit value shall be the subjective evaluation value B in Appendix C of GB8543 or agreed upon by the manufacturer and the user.
4.5.3.3 The noise level of the gearbox shall comply with the provisions of GB8542 2.1.2. 4.6 Bearings
Bearing design shall comply with the provisions of GB138542 2.2.7. 4.7 Bearing box and shaft seal
Bearing box and shaft seal shall comply with the provisions of GB8542 2.2.8 19200, the structural dimensions shall be determined by the manufacturer and the user through negotiation. (D) D) I, D) are the outer diameters of the flanges of the gearbox oil inlet and return pipes. Table 5
21.00~3. 90
3.90~4.85
>4.85~~5.51
25.515.70
>5. 70~-6. 40
≥6. 40~~7. 00
21. 00-3.90|| tt | 92 | 00~5. 51
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4. 75
4. 75~5. 51
>5. 51~-6 55
76.55--7.00
21. 004. 42
24. 42~-4. 92
≥4. 92 ~~5. 51
25. 51~6. 33
≥6. 33~7. 00
21.00~4.42
*4. 42--4. 92
-4.92-5. 51
>5. 51~6. 33
6. 33~7. 00
Note: () Key and keyway dimensions are in accordance with GB1095 JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical requirements
General requirements
4.1.1 The design and manufacture of the gearbox must comply with the following principles: Under the specified operating conditions, it can operate normally for three years. 4.1.2 The gearbox should operate safely within the specified value of the maximum speed limit of the connected unit. b
4.2 Box
4.2.1 The gearbox box is a cast structure or a welded structure. When using a casting structure, the mechanical properties of cast iron shall not be lower than the performance requirements of medium gray cast iron HT250 in GB9439, and stress relief treatment shall be carried out after casting; when using a welded structure, the material shall be carbon structural steel or low alloy structural steel with a tensile strength of not less than 375N/mm\, and the basic type and basic size of the welding slope shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box body shall meet the technical requirements of JB/ZQ4000.3. 4.2.2 The box body shall generally be tested for kerosene leakage, and no leakage shall be found. 4.2.3 The upper and lower boxes shall be tightly fitted after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to plug in the middle joint surface, and the plugged part shall not exceed one-third of the width of the joint surface. No joint surface of the box body shall leak oil. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange by (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat and smooth. Except for the user's requirements, the inside of the box body shall not be coated with permanent coating or paint. The paint on the outer surface of the box body shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, leak or peel. There shall be no rust, scratches or other phenomena on the surface.
4.2.6 The joint surface between the box body and the base is generally located with two locating pins. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2.7 The gearbox should generally be equipped with a ventilation device, which should comply with the provisions of 2.2.2.8 in GB8512. 4.2.8 The gearbox should be equipped with an inspection hole and a starter hole. Lifting lug (hole). 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to ZB/TJ17006 based on the gear geometry, material, process, precision and other specific conditions. Appendix A (supplement) of this standard provides a gearbox power rating table (the gear is carburized and ignited). The safety factor of the gear shall meet the user's requirements, or be determined by consultation between the designer and the user. The reference value of the minimum safety factor when the failure probability is less than 1 time is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with grades 4 to 6 specified in GB10095. 4.3.3 The gear tooth surface roughness shall be in accordance with GB1031.Ra0.8um. 4.3.4 Gear material
4.3.4.1 Gear Alloy structural steel should be used, and the material selection principles and quality control shall comply with the provisions of B/T5078. Its chemical composition and mechanical properties shall comply with the provisions of GB3077 or J3/ZQ4290. When the steel grades are similar, GB3077 shall prevail. 4.3.4.2 The gears shall be subjected to carburizing, nitriding or similar heat treatments. 4.3.4.3 The quality control of gear materials and heat treatment shall comply with the provisions of JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Particularly important gears shall be inspected according to ME grade.
4.3.4.4 The small gear and the shaft shall generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft shall adopt an interference fit structure, and the interference fit It should be ensured that there is no looseness in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth profile and tooth direction need to be modified. The tooth profile and tooth direction inspection should meet the design requirements.
4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru=).8μm 4.5 Dynamic characteristics
4.5.1 The gear rotor should be subjected to lateral critical speed analysis, and the elastic support should be considered during the analysis. 4.5.2 The gear rotor must be subjected to a dynamic balancing test after all parts are assembled. The test method is carried out according to (136557. The residual unbalance shall comply with the requirements of 2.2.6.2 of GB138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of GB38543. 4.5.3.2 When measuring the vibration on the gear journal, the limit value shall comply with the provisions of GB8512 2.2.6.3; when measuring the vibration of the gearbox body L, the sensor shall be installed as close to the bearing seat as possible, and the limit value shall be the subjective evaluation value B in Appendix C of GB8543 or agreed upon by the manufacturer and the user.
4.5.3.3 The noise level of the gearbox shall comply with the provisions of GB8542 2.1.2. 4.6 Bearings
Bearing design shall comply with the provisions of GB138542 2.2.7. 4.7 Bearing box and shaft seal
Bearing box and shaft seal shall comply with the provisions of GB8542 2.2.8 19251
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4 . 75
4. 75~5. 51
>5. 51~-6. 55
76.55--7.00
21. 004. 42||tt ||24. 42~-4. 92
≥4. 92 ~~5. 51
25. 51~6. 33
≥6. 33~7. 00| |tt||21.00~4.42
*4. 42--4.92
-4.92-5.51
>5.51~6.33
6.33~7.00
Note: ( ）The dimensions of key and keyway shall be in accordance with GB1095. JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical Requirements
General Requirements
4.1.1 The design and manufacture of the gearbox must comply with the following principles: it can operate normally for three years under the specified operating conditions; 4.1.2 The gearbox should be within the specified maximum speed limit of the connected unit. Safe operation. b
4.2 Housing
4.2.1 The gearbox housing is a casting structure or a welded structure. When using a casting structure, the mechanical properties of cast iron should not be lower than the performance requirements of gray cast iron HT250 in GB9439, and stress relief treatment should be carried out after casting; when using a welded structure, the material should be carbon with a tensile strength of not less than 375N/mm\ For plain structural steel or low alloy structural steel, the basic type and basic size of the welding slope [I shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box shall comply with the technical requirements of JB/ZQ4000.3. 4.2.2 The box should generally be tested for kerosene leakage and no leakage should be found. 4.2.3 The upper and lower boxes should be tightly closed after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to insert a feeler gauge at the center joint surface. The man-portion shall not exceed one third of the width of the joint surface. No oil shall seep from any joint surface of the box. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat. Smooth and clean. Except for the user's requirements, the inside of the box shall not have permanent coating or paint. The paint on the outer surface of the box shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, miss or peel. There is no rust or scratch on the surface.
4.2.6 Two locating pins are usually used to locate the joint surface between the housing and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2. 7 Gearboxes should generally be equipped with ventilation devices, which should comply with the provisions of 2.2.2.8 of GB8512. 4.2.8 Gearboxes should be equipped with inspection holes and 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to the gear geometry, material, process, precision and other specific conditions in accordance with ZB/TJ17006. Appendix A (Supplement) provides the gearbox power rating table (gears are carburized and fire treated). The safety factor of the gear should meet the user's requirements, or be determined by the designer and the user after consultation, with a failure probability of less than 1 The reference value of the minimum safety factor is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 grades specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear materials
4.3.4.1 Gear Alloy structural steel shall be used. The material selection principle and quality control shall be in accordance with B/T5078. Its chemical composition and mechanical properties shall comply with GB3077 or J3/ZQ4290. When the steel grade is different, GB3077 shall prevail. 4.3.4.2 Gears shall be Carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall be in accordance with JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Especially important gears shall be carried out in accordance with ME grade. ||tt| |4.3.4.4 The small gear and the shaft should generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft adopt an interference fit structure. It should be ensured that it does not loosen in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth shape and tooth direction need to be modified. The tooth shape and tooth direction should meet the design requirements. |tt||4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru =). 8 μm 4.5 Dynamic characteristics || tt || 4.5.1 The gear rotor should be analyzed for lateral critical speed, and the analysis should be considered as elastic support. 4.5.2 The gear rotor should be analyzed for all After the parts are assembled, they must be subjected to a dynamic balancing test together. The test method is as follows (136557). The residual unbalance shall comply with the requirements of 2.2.6.2 of G138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of G38543. 4.5.3.2 Vibration measurement on the gear journal When measuring the vibration of the gear housing L, the sensor should be installed as close to the bearing seat as possible, and the limit value should be the subjective evaluation value B in Appendix C of GB8543 or the value determined by the manufacturer. The factory and the user shall agree on this.
4.5.3.3 The noise level assessment of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft Seal
Bearing box and shaft seal should comply with (38542 2.2.8 19251
25. 51~6. 15
>6. 15 -~-7. 00
21. 00~3. 73
23. 73~4 . 75
4. 75~5. 51
>5. 51~-6. 55
76.55--7.00
21. 004. 42||tt ||24. 42~-4. 92
≥4. 92 ~~5. 51
25. 51~6. 33
≥6. 33~7. 00| |tt||21.00~4.42
*4. 42--4.92
-4.92-5.51
>5.51~6.33
6.33~7.00
Note: ( ）The dimensions of key and keyway shall be in accordance with GB1095. JB/T 7514
Continued Table 5
②) 127.00, the structural dimensions shall be agreed upon by the manufacturer and the user. 4 Technical Requirements
General Requirements
4.1.1 The design and manufacture of the gearbox must comply with the following principles: it can operate normally for three years under the specified operating conditions; 4.1.2 The gearbox should be within the specified maximum speed limit of the connected unit. Safe operation. b
4.2 Housing
4.2.1 The gearbox housing is a casting structure or a welded structure. When using a casting structure, the mechanical properties of cast iron should not be lower than the performance requirements of gray cast iron HT250 in GB9439, and stress relief treatment should be carried out after casting; when using a welded structure, the material should be carbon with a tensile strength of not less than 375N/mm\ For plain structural steel or low alloy structural steel, the basic type and basic size of the welding slope [I shall comply with the provisions of CB985. Stress relief treatment shall be carried out after welding, and the welded box shall comply with the technical requirements of JB/ZQ4000.3. 4.2.2 The box should generally be tested for kerosene leakage and no leakage should be found. 4.2.3 The upper and lower boxes should be tightly closed after being assembled. Before tightening the screws, use a 0.05mm feeler gauge to insert a feeler gauge at the center joint surface. The man-portion shall not exceed one third of the width of the joint surface. No oil shall seep from any joint surface of the box. 191
JB/T 7514--- 94
4.2.4 The periphery of the joint surface of the box body should be flat, and the upper box body flange is allowed to exceed the lower box body flange (3mm.4.2.5 The inner and outer surfaces of the box body should be sandblasted to make it flat. Smooth and clean. Except for the user's requirements, the inside of the box shall not have permanent coating or paint. The paint on the outer surface of the box shall comply with the provisions of (GB3181 or according to the user's requirements, and the paint shall not sag, miss or peel. There is no rust or scratch on the surface.
4.2.6 Two locating pins are usually used to locate the joint surface between the housing and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2. 7 Gearboxes should generally be equipped with ventilation devices, which should comply with the provisions of 2.2.2.8 of GB8512. 4.2.8 Gearboxes should be equipped with inspection holes and 4.3 Gear
4.3.1 The gear load capacity calculation shall be carried out by the manufacturer according to the gear geometry, material, process, precision and other specific conditions in accordance with ZB/TJ17006. Appendix A (Supplement) provides the gearbox power rating table (gears are carburized and fire treated). The safety factor of the gear should meet the user's requirements, or be determined by the designer and the user after consultation, with a failure probability of less than 1 The reference value of the minimum safety factor is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 grades specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear materials
4.3.4.1 Gear Alloy structural steel shall be used. The material selection principle and quality control shall be in accordance with B/T5078. Its chemical composition and mechanical properties shall comply with GB3077 or J3/ZQ4290. When the steel grade is different, GB3077 shall prevail. 4.3.4.2 Gears shall be Carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall be in accordance with JB/T5078, and the specific inspection items shall be carried out in accordance with GB85391MQ grade. Especially important gears shall be carried out in accordance with ME grade. ||tt| |4.3.4.4 The small gear and the shaft should generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft adopt an interference fit structure. It should be ensured that it does not loosen in the working state. 4.3.5 Considering the thermal deformation, elastic deformation and manufacturing error of the gear, the gear tooth shape and tooth direction need to be modified. The tooth shape and tooth direction should meet the design requirements. |tt||4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of shaft diameter is selected according to (6403.5 and .113/ZQ4238 4.4.3 The surface roughness of the journal is Ru =). 8 μm 4.5 Dynamic characteristics || tt || 4.5.1 The gear rotor should be analyzed for lateral critical speed, and the analysis should be considered as elastic support. 4.5.2 The gear rotor should be analyzed for all After the parts are assembled, they must be subjected to a dynamic balancing test together. The test method is as follows (136557). The residual unbalance shall comply with the requirements of 2.2.6.2 of G138542. 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gearbox shall be measured in accordance with the provisions of G38543. 4.5.3.2 Vibration measurement on the gear journal When measuring the vibration of the gear housing L, the sensor should be installed as close to the bearing seat as possible, and the limit value should be the subjective evaluation value B in Appendix C of GB8543 or the value determined by the manufacturer. The factory and the user shall agree on this.
4.5.3.3 The noise level assessment of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft Seal
Bearing box and shaft seal should comply with (38542 2.2.8 1925. The inner and outer surfaces of the box should be sandblasted to make them smooth and clean. Unless required by the user, no permanent coating or paint layer shall be applied inside the box. The paint on the outer surface of the box should comply with the provisions of (GB3181 or according to the user's requirements, and the paint should not sag, leak or peel. There should be no rust, scratches or other phenomena on the surface.
4.2.6 Two locating pins are generally used to locate the joint surface between the box body and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2.7 The gearbox should generally be equipped with a ventilation device, which should comply with the provisions of 2.2.2.8 in GB8512. 4.2.8 The gearbox should be equipped with inspection holes and lifting ears (holes). 4.3 Gear
4.3.1 The bearing capacity of the gear should be calculated by the manufacturer according to the specific conditions such as gear geometry, material, process, precision, etc. in accordance with ZB/TJ17006. Appendix A (supplement) of this standard provides a gearbox rated power table (the gear is carburized and ignited). Safety system of the gear The number should meet the user's requirements, or be determined by the designer and the user after consultation. The reference value of the minimum safety factor when the failure probability is less than 1 time is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 levels specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear material
4.3.4.1 Gears shall be made of alloy structural steel. The material selection principles and quality control shall comply with the provisions of B/T5078. The chemical composition and mechanical properties shall comply with the provisions of GB3077 or J3/ZQ4290. When the steel grades are similar, GB3077 shall prevail. 4.3.4.2 Gears shall undergo carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall comply with the provisions of JB/T5078 , the specific inspection items shall be carried out according to GB85391MQ level. Particularly important gears shall be inspected according to ME level.
4.3.4.4 The small gear and the shaft shall generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft shall adopt an interference fit structure, and the interference fit shall ensure that they will not loosen under working conditions. 4.3.5 Taking into account the thermal deformation, elastic deformation and manufacturing errors of the gears, the gears need to be modified in tooth profile and tooth direction. The tooth profile and tooth direction inspection shall meet the design requirements.
4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of the shaft diameter shall be selected according to (6403.5 and .113/ZQ4238) 4.4.3 The surface roughness of the journal is Ru= ).8μm4.5 Dynamic characteristics
4.5.1 The gear rotor shall be subjected to lateral critical speed analysis, and the analysis shall be considered as elastic support. 4.5.2 The gear rotor must be subjected to dynamic balancing test after all parts are assembled. The test method shall be carried out in accordance with (136557. The residual unbalance shall comply with the requirements of 2.2.6.2 of (G138542). 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gear box shall be measured in accordance with (G38543. 4.5.3.2 When measuring vibration on the gear journal, its limit value shall comply with the provisions of 2.2.6.3 of GB8512; when measuring vibration on the gear box body L, the sensor shall be installed as close to the bearing seat as possible for measurement, and its limit value shall be the subjective evaluation value B in Appendix C of GB8543 or agreed upon by the manufacturer and the user.
4.5.3.3 The noise level of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft seal
Bearing box and shaft seal shall comply with the provisions of 2.2.8 of (38542)1925. The inner and outer surfaces of the box should be sandblasted to make them smooth and clean. Unless required by the user, no permanent coating or paint layer shall be applied inside the box. The paint on the outer surface of the box should comply with the provisions of (GB3181 or according to the user's requirements, and the paint should not sag, leak or peel. There should be no rust, scratches or other phenomena on the surface.
4.2.6 Two locating pins are generally used to locate the joint surface between the box body and the base. The locating pins should be as close as possible to the bottom of the pinion axis. 4.2.7 The gearbox should generally be equipped with a ventilation device, and the ventilation device should comply with the provisions of 2.2.2.8 in GB8512. 4.2.8 The gearbox should be equipped with inspection holes and lifting ears (holes). 4.3 Gear
4.3.1 The bearing capacity of the gear should be calculated by the manufacturer according to the specific conditions such as the gear geometry, material, process, precision, etc. in accordance with ZB/TJ17006. Appendix A (supplement) of this standard provides a gearbox rated power table (the gear is carburized and ignited). Safety system of the gear The number should meet the user's requirements, or be determined by the designer and the user after consultation. The reference value of the minimum safety factor when the failure probability is less than 1 time is shown in Appendix B (reference).
4.3.2 The gear accuracy shall comply with the 4 to 6 levels specified in GB10095. 4.3.3 The gear tooth surface roughness shall comply with GB1031.Ra0.8um. 4.3.4 Gear material
4.3.4.1 Gears shall be made of alloy structural steel. The material selection principles and quality control shall comply with the provisions of B/T5078. The chemical composition and mechanical properties shall comply with the provisions of GB3077 or J3/ZQ4290. When the steel grades are similar, GB3077 shall prevail. 4.3.4.2 Gears shall undergo carburizing, nitriding or similar heat treatment. 4.3.4.3 The quality control of gear materials and heat treatment shall comply with the provisions of JB/T5078 , the specific inspection items shall be carried out according to GB85391MQ level. Particularly important gears shall be inspected according to ME level.
4.3.4.4 The small gear and the shaft shall generally be an integral forging structure. 4.3.4.5 The large gear can be forged as a whole or separately from the shaft. When forged separately, the large gear and the shaft shall adopt an interference fit structure, and the interference fit shall ensure that they will not loosen under working conditions. 4.3.5 Taking into account the thermal deformation, elastic deformation and manufacturing errors of the gears, the gears need to be modified in tooth profile and tooth direction. The tooth profile and tooth direction inspection shall meet the design requirements.
4.4.1 The shaft is generally made of quenched and tempered steel and is quenched and tempered. 4.4.2 In order to reduce stress concentration, the transition fillet radius of the stepped shaft at the change of the shaft diameter shall be selected according to (6403.5 and .113/ZQ4238) 4.4.3 The surface roughness of the journal is Ru= ).8μm4.5 Dynamic characteristics
4.5.1 The gear rotor shall be subjected to lateral critical speed analysis, and the analysis shall be considered as elastic support. 4.5.2 The gear rotor must be subjected to dynamic balancing test after all parts are assembled. The test method shall be carried out in accordance with (136557. The residual unbalance shall comply with the requirements of 2.2.6.2 of (G138542). 4.5.3 Vibration and noise
4.5.3.1 The vibration of the gear box shall be measured in accordance with (G38543. 4.5.3.2 When measuring vibration on the gear journal, its limit value shall comply with the provisions of 2.2.6.3 of GB8512; when measuring vibration on the gear box body L, the sensor shall be installed as close to the bearing seat as possible, and its limit value shall be the subjective evaluation value B in Appendix C of GB8543 or agreed upon by the manufacturer and the user.
4.5.3.3 The noise level of the gearbox shall comply with the provisions of 2.1.2 of GB8542. 4.6 Bearings
Bearing design shall comply with the provisions of 2.2.7 of G138542. 4.7 Bearing box and shaft seal
Bearing box and shaft seal shall comply with the provisions of 2.2.8 of (38542)192
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