HG/T 3139.3-2001 Vertical reducer for kettle LC series cylindrical gear reducer HG/T3139.3-2001 standard download decompression password: www.bzxz.net

1 Scope
Chemical Industry Standard of the People's Republic of China
Vertical reducer for tank
Series LC cylindrical gears reducerHG/T 3139. 3-2001
Replaces HG/T3141--1978
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of LC series two-stage coaxial cylindrical gear reducers (hereinafter referred to as reducers). This standard is applicable to mixing reducers for tanks in petrochemical, metallurgical mining, light industry food, pharmaceutical and sewage treatment, and vertical reducers for other purposes.
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T10951979 Flat key Key and key face dimensions GB/T1184—1996 Shape position tolerance tolerance value GB/T3077-1988 Technical conditions for alloy structural steel GB5903—1995 Industrial gear oil
GB/T9439—1988 Grey cast iron parts
GB/T10095—1988 Involute cylindrical gear accuracy JB/T 9050.3—1999
3 Product classification
Cylindrical gear reducer loading test method
3. 1LC type
! "1. Vertical self-connected reducer.
3.2 FLC type -
Vertical non-direct-connected reducer.
3.3 SLC type - vertical double-shaft reducer.3.4 Model representation method and example:
Approved by the State Economic and Trade Commission on January 24, 2002 and implemented on July 1, 2002
Structural type
Stop-connected type
Non-direct-connected type
Dual-shaft type
Calibration symbol
Motor code
HG/T 3139.3-2001
Type code
LC indicates
Two-stage gear reducer
Machine model
Motor type (double-shaft type omitted)
Motor name
Asynchronous motor
Explosion-proof safety asynchronous motor
Explosion-proof asynchronous motor
Brake asynchronous motor (additional brake) Multi-speed asynchronous motor
P/n code
This table 1 (can also be connected
Note P and n Value)
Calibration symbol Motor code
Output shaft extension
Structure code
1 Clamp shell type
Ordinary type
Motor name
Flameproof multi-speed asynchronous motor
Electromagnetic speed regulation asynchronous motor
Flameproof electromagnetic speed regulation asynchronous motor
Explosion-proof brake asynchronous motor (additional brake) Variable frequency speed regulation special motor
The transmission ratio, output speed, input power and output shaft allowable torque of the reducer shall comply with the provisions of Table 1. Table 1
Transmission ratio1
Output speedn
Motor power
j750 r/min
Transmission ratio, output speed, input power and output allowable torque10
1000 r/min
4-pole motor
1 500 r/min
P/n code
Zhengsu machine
Output shaft
Permissible torque
LC125A
Transmission ratio:
Output speed #
Motor power P
750x/min
1000r/min
1In the table, "" indicates non-selection area, and the others are selection areas HG/T3139.3-—2001
Table 1 (end)
Motor
P/n code
4-pole motor
1500 t/tmin
2Those with "*\ should use non-direct-connection type, especially LC200A, LC250A, LC325A with \×\ must use non-direct-connection type. 3 LCA type adopts forced lubrication and adds sealing device. The installation and overall dimensions of the speed reducer shall comply with the requirements of Figure 1 and Table 2. 3.6
Reducer
Permissible torque
IC200A3283
LC325A
J1 type shaft
Machine model
Machine model
Center distance a
Direct connection type
Shaft diameter
5055)k6
65(70)m6
1301n6
IG/T 3139.3--2001
I-type shaft
Non-straight type
Figure 1I.C type two-stage gear reducer appearanceFigure 2 Reducer installation and appearance dimensions
Bearing spacing
Note: 11 and H values ​​are calculated based on the Y motor height of 4-pole motor ≥218.5kW and 6-pole motor ≥15kW. If other series of motors are used, H and H values ​​should be changed accordingly. 56
Outer dimensions
582-~622
681~~816
B68-~1148
1090--1370
1159--1749||t t||1683--2108
2300~-2500
effective sheath type
72G--760
818-981
1026---1 346
1 290--1570
1679-1999
1 973-~-2 398
2 690-~2 890
VI type motor height gauge Others are Y series BS type. IC type size also applies to small corresponding IC (A) type 4 requirements.
4. 1 Working conditions
HG/T3139.3—2001
4.1.1 The working environment temperature of the reducer is -40～40℃. Under rated load and rated speed, the oil pool temperature of the reducer shall not exceed 45℃, and the maximum oil temperature shall not exceed 85℃. When the ambient temperature of LC(A) reducer is below 0℃, the lubricating oil shall be preheated to above 0℃ before starting.
4.1.2 The rated voltage of the motor power supply is 380V and the rated frequency is 50Hz.4.1.3 This standard The included reducers are suitable for continuous working and allow forward and reverse operation. 4.1.4 Input speed should not exceed 1500r/min4.2 Housing and upper seat [motor connection frame 1. Middle seat 4.2.1 The mechanical properties of the housing, upper seat and middle seat materials shall comply with the provisions of HT200 in G3/十9439. 4.2.2 Castings shall be aged or annealed, and the surface after processing shall not have defects such as cracks, pores, shrinkage and slag inclusions, and other parts shall not have defects that affect the performance of the castings. 4.2.3 The center distance limit deviation fa of the housing gear bearing hole shall comply with the provisions in Table 3. Table 3
Center distance limit deviation fa
Machine model
Center distance limit deviation fa
±0. 0445
4.2.4 The tolerances fx and fy of the axis parallelism of the gear bearing hole of the housing shall comply with the provisions of the medium & grade accuracy of GI3/T10095. 4.2.5 The main dimensional accuracy, form and position tolerance accuracy grade and surface roughness of the housing, upper seat and middle seat shall comply with the provisions in Table 4. The grade and tolerance value of form and position tolerance shall comply with the provisions of GI3/TI184. Table 4 Main dimensional accuracy, geometric tolerance and surface roughness of the box body, upper seat and middle seat Structural parts
Each bearing hole
Upper end inner diameter and end face
Lower end outer diameter and end face
Upper seat (box cover) Lower boss outer diameter
Middle seat upper stop inner diameter and end face
4.3 Gears, gear shafts
Match tolerance grade
Tolerance zone Mating parts tolerance zone
Geometric tolerance accuracy grade
Parallelism
Coaxiality
Verticality
4.3.1 The tooth surface is allowed to be hardened by ion nitriding or finished by carburizing and tumbling. Relative to the base
Input shaft hole axis
To the lower end
Input bearing hole axis
To the bearing hole centerline
To the shaft hole axis
To the bearing hole axis
Surface roughness
4.3.1.1 Ion nitriding process: The material is 38CrMoA1. The mechanical properties shall comply with the provisions of GB/T3077. It is allowed to replace it with 42CrMo material, and the mechanical properties shall also comply with the provisions of GB3/T3077. 4.3.1.2 Carburizing and tumbling process: The material is 20CrMnTi or 20CrMmMo. The mechanical properties shall comply with the provisions of GB/T3077. 4.3.2 The gear is forged by forging process and normalized after forging. 4.3.3 The ion nitriding tooth surface nitriding layer depth and hardness shall comply with the requirements of Table 5 and Table 6. 57
38CrMoAi
42CrMo
Modulus, mm
1. 5 ~ 2. 5
HG/T 3139. 3—2001
Selection of gear nitriding layer depth
Table 6 Gear quenching and nitriding hardness range
Original condition
Pretreatment
The nitriding tooth surface is not allowed to have defects such as cracks, punctures, fragmentation, bright spots, etc. Hardness, HB
241--285
Depth range.mr
0. 25-~ 0. 40
0. 35~0. 50
0. 45~~0. 55
Surface hardness of steel
900~-1100
550~700
4.3.5 The effective carburizing layer depth, tooth surface hardness, core hardness and carbon concentration of carburizing layer of carburized gears are recommended in Table 7: Table? Carburized layer depth, tooth surface hardness, core hardness and carburized layer carbon concentration modulus, tri
Effective carburized layer depthwww.bzxz.net
Carburized layer carbon concentration
Tooth surface hardness
Core degree
1~1, 5
0. 2--0. 5
0. 4.~0. 7
Carburized and annealed gears are finished T, and hair-like cracks are not allowed on the tooth surface, >2. 75~1
0. 8-~1. 2
4.3.7 The manufacturing accuracy of gears and gear shafts shall not be lower than Grade 8 accuracy in GB/T10095, and the radial and end face runout tolerances of the tooth reference surface shall comply with the provisions of Table 8. 4.3.8
Table 8 Radial and end face runout tolerance of tooth reference surface Indexing national diameter
≥4~6
1. 2 --1. 7
Gear accuracy grade
Grade 1 and 8
29--10
1. 3-- 2. 0
4.3.9 The main dimensional accuracy, form and position tolerance accuracy grade and surface roughness of gears and gear shafts shall comply with the provisions of Table 9, and the form and position tolerance accuracy grade and tolerance value shall comply with the provisions of G13/T1184. Table 9 Dimensional accuracy, geometric tolerance accuracy grade and surface roughness Structure Part
Aperture of large gear
Aperture of secondary gear
Fit tolerance grade
Form tolerance accuracy grade
Tolerance zone Tolerance zone of matching part Coaxiality
Cylinder
Relative accuracy
Surface roughness
Structural part
Shaft structure matched with shaft tension
Neck matched with coupling
Second gear aperture (used in direct connection type)
Neck matched with bearing
Second gear
Neck matched with gear
4.4 Output shaft
HG/T 3139.3—2001
Table 9 (complete)
Match tolerance grade
: Mating parts tolerance zone
Tolerance zone
4.4.1 Material is 45# steel, quenched and tempered 217~255H13 Form and position tolerance accuracy grade
Coaxiality Cylindricity
Relative base thrust
To the axis
To the axis
To the axis
To the axis
To the axis
To the axis
To the axis
To the axis
To the axis
To the axis
4.4.2 The tolerance zone of the axis at the matching with the bearing is k6, and the tolerance zone of the shaft head matching with the gear is k6, and the coaxiality is the 6th grade accuracy in GB/T1184.
The key on the cylindrical shaft extension shall comply with the provisions of GB/T1095. 4.5 Assembly
4.5.1 The inner ring of the bearing must be close to the shaft shoulder or the distance ring. Check with a 0.05mm feeler gauge to ensure that it is not inserted. 4.5.2 The axial clearance of the tapered roller bearing (contact angle 310°～16°) shall comply with the provisions of Table 10. Turn the shaft by hand, and the bearing must run lightly and flexibly.
Table 10 Axial clearance of tapered roller bearings
Bearing inner diameter
>30--50
80~120
>120~180
>180-~260
4.5.3 The minimum normal tooth side clearance of the gear pair shall comply with the provisions of Table 11 Axial clearance
Minimum normal tooth clearance of the gear pairj.
Center distance a, mm
nnin -um
400400~500≥500~630>630~71g
*80--125 125--180180~250250~315/315--140
4.5.4 The height of the contact spot (contact rate) on the gear surface shall not be less than 40%, and the length shall not be less than 50%. The distribution position of the contact spot should be close to the middle of the tooth surface, and the teeth and the edges of the two ends are not allowed to contact. It is allowed to inspect the contact spots by the no-load running-in gloss method. 4.5.5 The inner and outer surfaces of the parts must be cleaned of burrs, chips, rust, residual sand and dirt before assembly. The surface of the casting without T should be painted with primer and then painted, and the inner surface without machining should be painted with red oil-resistant paint. 59
HG/T3139.3—2001
4.5.6 There should be no oil leakage on the shaft oil seal and other sealing surfaces. 4.5.7 The appearance of the reducer should be neat, the paint layer should be uniform, and the surface should be free of damage. 4.6 Reducer lubrication and selection of lubricating oil 4.6.1 The lubrication of the reducer gear adopts oil bath lubrication and natural cooling. 4.6.2 The LCA type adopts circulating oil injection forced lubrication. 4.6.3 The selection of reducer oil should be based on the ambient temperature and the pitch line speed of the low-speed gear. Select different brands of gear oil of GB5903L-CKC.
4.6.4 Bearing lubrication:
a) Use fly condensate lubrication. The oil is the same as the gear lubricating oil. b) All bearings lubricated with grease can use general lithium-based grease. .5 Test method
5.1 No-load test
The reducer must be tested with no-load. Before the test, sufficient lubricant should be added according to the specified oil level. During the test, the gearbox should be operated for 1 hour in each direction at the rated speed. The no-load test should meet the following requirements: a) All connecting parts and fasteners should not be loose. b) All seals and joints should not leak oil. c) The operation should be smooth and normal, without impact and abnormal noise. d) The oil temperature rise should not exceed 25℃ and the lubrication should be sufficient. e) The contact spots on the tooth surface should meet the requirements of 4.5.4. If it does not meet the requirements, it is allowed to continue running for 1 hour. 5.2 Load test
5.2.1 After the no-load test is qualified, the load test can be carried out. At the rated speed, the load test is carried out in four steps, with 25% of the rated power loaded each time. After the oil temperature reaches the level for 1 hour, the load test is increased by one level. 5.2.2 The load test should meet the following requirements: a) All seals and joints should not leak oil. b) The contact spots on the tooth surface shall meet the requirements of 4.5.4. c) The reducer shall run smoothly and normally without impact and abnormal ah sound. d) The temperature rise of the lubricating oil in the reducer housing shall not exceed 45℃, and the maximum oil temperature shall not exceed 85℃. e) The maximum noise measured 1m away from the reducer housing shall not exceed 85dB(A). When the power P is greater than or equal to 75kW, the noise shall not exceed 90dB(A).
5.3 Full load test
The full load test shall be loaded to 90% of the rated power and run continuously for more than 21h. The test results shall meet the requirements of 5.2.2. This test is allowed to be carried out at the main site and according to the requirements of the host. 5.4 Overload test
5.4.1 The overload test shall be carried out after the load test is qualified. The overload test shall be carried out at the rated speed, and the rated power shall be operated for 1min at 120% and 1min at 150%; and 0.5min at 180%. 5.4.2 After the overload test, the reducer shall meet the requirements of 5.2.2 and shall be able to operate normally. This test is allowed to be carried out at the host site and according to the host's requirements.
5.5 Fatigue life test
5.5.1 The fatigue life test is mainly aimed at the assessment of the fatigue life of the gear. It can be tested on the factory load test bench 1:. It is also allowed to use industrial application test instead of fatigue life test, but the fatigue test must be carried out according to the equivalent load cycle number under the actual load of industrial application, and there must be accurate H records. The test time is not less than 3600h. 5.5.2 The fatigue life test must be carried out after the tests of 5.1 and 5.2 are passed. The test should be carried out under rated load. The stress cycle number of the high-speed gear should reach 2×10% of the second. The operation time of the number of times, and the load test should be carried out according to this time. 5.5.3 The fatigue life test or industrial application test under rated load shall be no less than 3600h. The integrity requirements of the reducer are as follows: a) There is no breakage between the gear and the machine parts. b) There is no bonding or scratching on the tooth surface. c) The wear thickness of the tooth surface, measured near the tooth root, shall not exceed 4% of the gear module value. d) The limit of the pitting area on the tooth surface shall be calculated according to the formula in JB/T9050.3. 6 Inspection rules 6.1 Inspection and testing Products shall be inspected and qualified one by one before leaving the factory. Factory inspection shall be carried out in accordance with the requirements of 5.1 and shall comply with the requirements of Chapter 4. 6.2 Sampling inspection and testing 6.2. 1 Sampling inspection and testing shall be carried out in the following cases: a) For various machine models with an annual cumulative output of more than 100 units, sampling inspection shall not be less than once a year. For those with less than 100 units, the sampling inspection shall not be less than times within the period when the cumulative production reaches 100 units. b) When evaluating or certifying product quality.
c) When the main technical performance fails to meet the standards. 6.2.2 Sampling method: When the batch of the reducer to be inspected is greater than 10 units, 10% shall be inspected, and when each batch is less than 10 units, one unit shall be inspected. If the sampling inspection fails, double the sampling inspection, and if it still fails, each unit shall be inspected. 6.2.3 The items of sampling inspection shall be carried out in accordance with the requirements of 5.1, 5.2, and 5.4, and it is also allowed to be carried out in accordance with the requirements of 5.1, 5.3, and 5.4. 6.3 Type inspection
6.3.1 In any of the following cases, type inspection shall be carried out; 2) Finalization identification before the new product is put into production,
h) After the formal production, if the design, process or material of the product has changed significantly enough to cause changes in certain characteristics and parameters. e) When the product is newly put into production after a long period of suspension. d) When the user proposes and has special requirements. 6.3.2 Type inspection shall be carried out in accordance with 5.5.
7 Marking, packaging, transportation and storage
7.1 Each reducer shall be fixed with a product nameplate in the position specified on the product drawing. The nameplate shall be separated from the base body by a paint layer when installed. The content of the product nameplate is as follows:
a) Product name,
h) Product model,
c) Transmission ratio.
d) Rated output torque.
e) Rated power.
Weight.
No.) Product number.
h) Date of manufacture.
i) Manufacturer name.
7.2 The outer surfaces of the reducer shaft extension and key should be coated with anti-rust grease and tightly wrapped with plastic cloth, or other protective measures should be taken. Other exposed surfaces should also be coated with anti-rust oil.
7.3 The technical documents provided with the product include:61
a) Product certificate and packing list.
b) Product instruction manual.
HG/T 3139. 3-2001
Technical documents should be placed in plastic bags and fixed on the inner wall of the box. 7.4 Products should be packed and shipped, and should be fixed in the box, and should be suitable for land and water transportation and loading requirements. Waterproof materials should be laid in the packaging box.
7.5 The outer wall of the packaging box should have obvious text markings. The text markings should be clear and neat, and ensure that they will not be blurred by rain erosion: The content includes:
a) Receiving unit and address.
b) Product manufacturer, product name, model. c) Net weight, gross weight, box dimensions and factory number. 7.6 During transportation and lifting, it should be stably lifted and placed, placed upright, and not inverted. 7.7 The reducer should be purchased and stored in a clean place that can prevent rain, snow and water from intrusion and cracking. 62
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