JB/T 8853—2001 JB/T 8853-2001 Cylindrical gear reducer JB/T8853-2001 Standard download decompression password: www.bzxz.net

JB/T8853-2001
This standard is a revision of JB/T8853.--1999 (ZBJ190041988) "Cylindrical Gear Reducer". The main differences in technical content between this standard and JB/T8853--1999 are: the selection method and selection coefficient of reducer have been revised; the provisions for medium hardened gear reducer have been cancelled. This standard replaces IB/T8853--1999 from the date of implementation. Appendix A of this standard is the appendix of the standard.
Appendix 1, Appendix (, Appendix I) and Appendix E of this standard are all indicative appendices. This standard was proposed and assigned by the Mechanical Industry Metallurgical Equipment Standardization Technical Committee. This standard was drafted by: Xi'an Heavy Machinery Research Institute, Jiangyin Gearbox Manufacturing Company, Jiangsu Province Reducer), Dawanxin Reducer Factory, Shanxi Pingyao Reducer Factory, Jiangsu Taixing Reducer Factory, Ma'anshan Transmission Machinery Factory, Jiangsu Tailong Reducer Factory. The main drafters of this standard are: Xu Honggou, Chen Yawen, Sun Junli, Sun Changfa, and Fan Shiyao. The previous versions of the standards replaced by this standard are: JB 1130---1970.ZB J19 004---1988, JB/T 885320G
1 Scope
Mechanical Industry Standard of the People's Republic of China
Cylindrical Gear Reducer
Reduction Cylindrical Gear UnitsJB/T 8853-:2007
Replaces JHT88339
This standard specifies the basic parameters, types, dimensions, technical requirements, load bearing capacity, selection methods, etc. of cylindrical gear reducers (hereinafter referred to as reducers).
The reducers specified in this standard are applicable to the transmission of various mechanical equipment in industries such as metallurgy, mining, transportation, cement, construction, chemical industry, textile, light industry and energy.
The speed of the high-speed shaft of the reducer shall not exceed 1500r/min. The circumferential speed of the gear transmission of the reducer shall not exceed 20m/s. The working environment temperature of the reducer is 40~+45℃. When the working environment filtration is lower than 0℃, the lubricating oil must be heated to 0℃ before starting. When the working environment temperature is higher than 45℃, insulation and cooling measures must be taken. 2 Reference standards
The provisions contained in the following standards are constituted as the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid: All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards GB/T1184-1996 Shape and position tolerances Unmarked tolerance values ​​GB/T1356--1988 Involute cylindrical gear basic teeth GB/T1357--1987 Involute cylindrical gear module GB/T1569-1990 Cylindrical shaft extension
G13/T 9439 1988
Gray iron castings
GBT10095—1988Precision of involute cylindrical gearsJ13/『5000.13--1998General technical conditions for heavy machineryIB/T 6395 -- 1992
Large gear ring forgings
JB/T 7929 ---1999
3 Type, marking and size
3.1 Type
Cleanliness of gear transmission device
The reducer model is represented by IZDY, ZIY, ZSY; reducer 71)Y represents a single-stage cylindrical gear reducer; reducer Z1.Y represents a two-stage cylindrical gear reducer; reducer ZSY represents a three-stage cylindrical gear reducer. 3.2 Marking
Approved by China Machinery Industry Federation on 200108-23 and implemented on 2001-12-01
3.2.1 Marking method
3.2.2 Marking example
JB/T 8853-- 2001
-Standard No.
Assembly Type
Nominal Transmission Ratio
Specification (Final Stage Center Distance).mm
560-11.21
JB/T 8853---2001
Standard No.
First Type of Assembly
Nominal Transmission Ratio ７=11.2
Specification (Wooden Stage Center Distance) α560mm
Model: Two-stage Cylindrical Gear Reducer 3.3 Types and Dimensions of Reducers
3.3.1 The assembly type and overall dimensions of ZDY reducers shall comply with the provisions of Figure 1 and Table 1. 3.3.2 Z1.Y Reducer The assembly type and external dimensions of the reducer shall comply with the provisions of Figure 2 and Table 2. 3.3.37SY The assembly type and external dimensions of the reducer shall comply with the provisions of Figure 3 and Table 3nxd.
Assembly type
175260
1150:645
11290710
090450
1360560
(m6）
JB/T 8853 -2001
/ - 1. 25~2. 8
210：150
385 : 470
142：
=3. 15-4.
247.6207..
Bolt hole
7501065765|| tt||JB/T 8853-—2001
Assembly type
16. 3~11. 2
1 - 12. 5~20
JB/T 8853 --2001
Continued Table 2
165.5137.
252.5192.5
265 215
117.5317.
Assembly type
Anchor bolt hole
Sanxuerun
Huazhijing
1160570
280600
13201240
103014801395
116016551565:120
JB/T 8853
= 22. 471
i=22.4～35.5
1- 80-100
i= 50～90
130：590
Anchor bolt hole
200:110
200847
240530
2801640
1301010
Reference lubrication
lubricating oil quantity
3.3.4 Input and output shaft extension of reducer JB/T8853—.
The input and output shaft extension of the reducer shall comply with the provisions of GB/T1569. Basic parameters
4.1 Center distance of gear transmission of reducer
4.1.1Z1)Y The center distance of the reducer shall comply with the provisions of Table 4 Table 4
Center distance.
21.Y The center distance α of the reducer shall comply with the provisions of Table 5. Table 5
Low speed grade
High speed grade
Total center
ZSY The center distance of the reducer shall comply with the provisions of Table 6. Table 6
Low speed grade:
Intermediate grade &
High speed grade.
Total center distance
Low speed grade u:
Intermediate grade t
High speed grade
Total center distance
Nominal transmission ratio of the reducer
ZI) The nominal transmission ratio i of the reducer shall comply with the provisions of Table 7. 4. 2. 1
Nominal transmission ratio
ZI.Y The nominal transmission ratio i of the reducer shall comply with the provisions of Table 8. Table 8
Nominal transmission ratio,
JB/T8853--2001
4.2.3 Nominal transmission ratio of ZSY reducer: It should comply with the provisions of Table 9. Table 9
Nominal transmission ratio:
4.3 The relative error between the actual transmission ratio of the reducer and the nominal transmission ratio ZY reducer shall not exceed 3%;
ZLY reducer shall not exceed 4%;
ZSY reducer shall not exceed 5%.
4.4 Tooth width coefficient and tooth width of reducer gear 31.5
Tooth width coefficient b of reducer gear: -0.35. Tooth width h=hα. α is the center distance of the inter-gear transmission 4.5 Reducer gear module m
The module m of the reducer gear shall comply with the provisions of GB/T1357. 4.6 Basic tooth profile of reducer gear
The basic tooth profile of reducer gear shall comply with the provisions of (GB3/T1356, 5 Technical requirements
5.1 Body and cover
5.1.1 Cast iron parts shall be used, and their mechanical properties shall not be lower than IIT200 in GB/T5675. Welded parts are allowed. After the body and cover are assembled, the flange of the cover is 0.4mm wider than the flange of the body. 5.1.2
5.1.3 Aging (or annealing) treatment shall be carried out. 5.1.4
·
The surface roughness of the separation and assembly surface shall be Ra3.2μm, and the parallelism with the bottom plane shall not be lower than GB /T1184 Grade 8
The body and cover should fit tightly when free joints are included. The depth of the joint should not exceed the width of the joint surface when checked with a 0.051mm ruler. The bearing hole size tolerance is H7. The surface roughness is Ra3.2μm. The cylindricality of the bearing hole is not less than Grade 7 in GB/T1184. The verticality of the end face and the bearing hole is not less than Grade 8 in G1B/T1184. The center distance limit deviation of the bearing hole should comply with the provisions of Table 10. Table 10
Center distance
Limit deviation
Bearing hole center line parallelism tolerance · Measured on the bearing span is not greater than the value specified in Table 11 5. 1. 10
Bearing span
Parallelism inspection
125-280
2280560
JB/T8853
5.1.11 The center line of the bearing hole should be written with the facets coincident, and the error is not greater than 0.3mml5.1.12 The body is not allowed to leak oil,
5.2 Gears, gear shafts and shafts
5.2.1 Gears and gear shafts are forged, and the materials and heat treatment are shown in Table 12. It is allowed to use materials with equivalent or higher mechanical properties. The effective hardened layer depth of the gear tooth surface after carburizing fire finishing is selected according to the module. When m=1.5~6 When m is 7~18, it is (0.15~0.25) mm. The material of the shaft without cracks is -12℃ rMo. Its mechanical properties are shown in Table 12. It is allowed to use materials with equivalent or higher mechanical properties. Table 12
Material brand
17G12Ni2Mo
206rMnMo
Heat treatment
Carburizing quenching and temperingbZxz.net
Carburizing quenching and tempering
For shaft quenching and tempering
Material standard number
JB/T6395---1992
(57+ 4) HRC:
30*- 12 HR(
255~ 286 HB
The machining dimension tolerance zone, shape and position tolerance and surface roughness of the gear reference hole and reference end face shall comply with the provisions of Table 13. Table 13
Gear reference hole
Gear reference end face
Dimension tolerance zone
Cylindricity
GB/T1184
End face runout
GB/T 10095
Surface roughness R
5.2.3 The dimension tolerance zone, shape and position tolerance and surface roughness of the reference journal and shoulder of the gear shaft and the shaft and bearing shall comply with the provisions of Table 14.
Reference shaft pre
provisions.
Dimension tolerance zone
GB/T 1184
End face runout
GB/T 1184
Surface roughness R
The shaft extension diameter, shoulder machining dimension tolerance zone, shape and position tolerance and surface roughness of gear shafts and shafts shall conform to Table 15 including Table 15
Shaft extension diameter
Shaft extension shaft
Dimension tolerance zone
GB/T 1184
End face runout
G3/T 1184
Surface roughness R
JB/T8853---2001
5.2.5 The fit between gears and shafts shall conform to the provisions of Table 16. Nominal diameter
50～80
2-120~400
Shaft and gear matching journal and shoulder shape position tolerance, surface roughness shall comply with the provisions of Table 17Table 17
Shaft and gear matching journal
Shaft and gear matching shoulder
Cylindricity
GB/T 1184
Coaxiality with bearing journal
GB/T 1184
End face runout
GB/T 1184
The plus 1 dimensional accuracy, shape and position tolerance and surface roughness of the keyway shall comply with the provisions of Table 18 Table 18
Keyway width tolerance zone
The symmetry of the keyway width relative to the axis
Not less than Grade 9 in GB/T1184
5.2.7 The deviation of the diameter of the gear and gear shaft shall be taken as h11. 5.2.8 The accuracy of the gear shall comply with the provisions of GB/T10095: When the pitch circle diameter d≤125mm, it is 6JI.; when 125 mmThe size tolerance zone, shape and position tolerance and surface roughness shall comply with the requirements of Table 14.
Preliminary axis
Requirements.
Dimension tolerance zone
GB/T 1184
End face runout
GB/T 1184
Surface roughness R
The shaft extension diameter, shoulder machining dimension tolerance zone, shape and position tolerance and surface roughness of gear shafts and shafts shall conform to Table 15 including Table 15
Shaft extension diameter
Shaft extension shaft
Dimension tolerance zone
GB/T 1184
End face runout
G3/T 1184
Surface roughness R
JB/T8853---2001
5.2.5 The fit between gears and shafts shall conform to the provisions of Table 16. Nominal diameter
50～80
2-120~400
Shaft and gear matching journal and shoulder shape position tolerance, surface roughness shall comply with the provisions of Table 17Table 17
Shaft and gear matching journal
Shaft and gear matching shoulder
Cylindricity
GB/T 1184
Coaxiality with bearing journal
GB/T 1184
End face runout
GB/T 1184
The plus 1 dimensional accuracy, shape and position tolerance and surface roughness of the keyway shall comply with the provisions of Table 18 Table 18
Keyway width tolerance zone
The symmetry of the keyway width relative to the axis
Not less than Grade 9 in GB/T1184
5.2.7 The deviation of the diameter of the gear and gear shaft shall be taken as h11. 5.2.8 The accuracy of the gear shall comply with the provisions of GB/T10095: When the pitch circle diameter d≤125mm, it is 6JI.; when 125 mmThe size tolerance zone, shape and position tolerance and surface roughness shall comply with the requirements of Table 14.
Preliminary axis
Requirements.
Dimension tolerance zone
GB/T 1184
End face runout
GB/T 1184
Surface roughness R
The shaft extension diameter, shoulder machining dimension tolerance zone, shape and position tolerance and surface roughness of gear shafts and shafts shall conform to Table 15 including Table 15
Shaft extension diameter
Shaft extension shaft
Dimension tolerance zone
GB/T 1184
End face runout
G3/T 1184
Surface roughness R
JB/T8853---2001
5.2.5 The fit between gears and shafts shall conform to the provisions of Table 16. Nominal diameter
50～80
2-120~400
Shaft and gear matching journal and shoulder shape position tolerance, surface roughness shall comply with the provisions of Table 17Table 17
Shaft and gear matching journal
Shaft and gear matching shoulder
Cylindricity
GB/T 1184
Coaxiality with bearing journal
GB/T 1184
End face runout
GB/T 1184
The plus 1 dimensional accuracy, shape and position tolerance and surface roughness of the keyway shall comply with the provisions of Table 18 Table 18
Keyway width tolerance zone
The symmetry of the keyway width relative to the axis
Not less than Grade 9 in GB/T1184
5.2.7 The deviation of the diameter of the gear and gear shaft shall be taken as h11. 5.2.8 The accuracy of the gear shall comply with the provisions of GB/T10095: When the pitch circle diameter d≤125mm, it is 6JI.; when 125 mm
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