This standard is formulated for the first time. This standard specifies the basic parameters, models, markings, dimensions, technical requirements and load-bearing capacity of vertical arc cylindrical worm reducers. The reducers specified in this standard are mainly suitable for chemical, pharmaceutical, construction, food, light industry and other industries. The working environment temperature of the reducer is -15~40℃, and the altitude does not exceed 1000m. When the working environment temperature is below 0℃, the lubricating oil must be heated to above 0℃ before starting, or a lubricating oil with a low freezing point should be used. The reducer can run in forward and reverse directions. JB/T 7848-1995 Vertical Arc Cylindrical Worm Reducer JB/T7848-1995 Standard download decompression password: www.bzxz.net

JB/T7848
This standard is the first vertical arc cylindrical worm reducer mechanical industry standard formulated in my country. The standard reducer uses advanced performance arc cylindrical worm transmission, so its load-bearing capacity reaches the advanced level of similar foreign products, which helps to eliminate the current situation of low performance and confusing specifications of such products in China.
During the formulation of this standard, GB9147 parameters were mainly referenced and quoted.
Appendix A of this standard is the appendix of the standard.
This standard was proposed and drafted by Xi'an Heavy Machinery Research Institute of the Ministry of Machinery. The relevant technical requirements and basic standards of "Arc Cylindrical Worm Reducer" are mainly drafted by: Yang Jun, Zhang Kai, Zhao Yuliang, Sun Changfa, Dong Jianfeng, 620
Machinery Industry Standard of the People's Republic of China
Vertical Arc Cylindrical Worm Reducer
Subject Content and Scope of Application
JB/T7848
This standard specifies the basic parameters, models, markings, dimensions, technical requirements and load-bearing capacity of vertical arc cylindrical worm reducers (hereinafter referred to as reducers).
The reducers specified in this standard are mainly suitable for chemical, pharmaceutical, construction, food, light and other industries. The working environment temperature of the reducer is -15~+40℃, and the altitude does not exceed 1000m. When the working environment temperature is lower than 0℃, the lubricating oil must be heated to above 0℃ before starting, or a lubricating oil with a low freezing point can be used. The reducer can run in both forward and reverse directions.
2 Referenced standards
The provisions contained in the following standards constitute 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, and the parties using this standard should explore the possibility of using the latest versions of the following standards. G13191·-85 Packaging storage and transportation graphic label
GB914788
G3 9439--88
C 11544--89
Circular arc worm reducer
Grey cast iron
Dimensions of ordinary V-belts and narrow V-belts
GB/T 13384-92
General technical conditions for packaging of electromechanical products
--88Y ​​series (IP44) three-phase asynchronous motor technical conditions ZB K22 007-
Loading test method for worm reducer
JB 5558--91
3 Model, marking, size
3.1 Model
The model of this reducer is represented by the letters LCW, where I. indicates that the structure of the reducer is vertical, and W indicates that the worm tooth profile is (! shape).
3.2 Marking
3.2.1 Marking method
Standard number
-Motor control number
Cooling method code
Nominal transmission ratio
Reducer center distance
Approved by the Ministry of Machinery Industry of the People's Republic of China on December 1, 1995 and implemented on July 1, 1996
3.2.2 Marking example
125—
3.3 Type and sizeWww.bzxZ.net
F... Y132M
JB/T 7848--1995
JB/T 7848—1995
The type and size of the reducer shall comply with the provisions of Figure 1 and Table 1. Figure 1
-Standard No.
Motor Model
Fan Cooling
Nominal Transmission Ratio 1=10
Reducer Center Distance u125mm
Vertical Circular Cylindrical Worm Reducer
78481995
811~86
619 7 -65t 1
[～f{
001 1~526
106099
099009
218-09
589-38
：596
：009059
4 Basic parameters
4.1 The center distance of the reducer shall comply with the provisions of Table 2 JB/T7848—1995
4.2 The nominal transmission ratio of the reducer shall comply with the provisions of Table 3. 4.3 The motor used for the reducer shall comply with the provisions of ZBK22007, and other types of motors can also be used according to user requirements 4.4 The tooth profile of the worm is C1, and its reference tooth shall comply with the provisions of Appendix A in GB9147. Table 2
Transmission ratio:
4.5 The helical direction of the worm is right-handed.
5 Technical requirements
5.1 V-belt and pulley
5.1.1 The reducer is driven by a motor through a narrow V-belt. The model and size of the V-belt shall comply with the provisions of GB11544. 223
5.1.2 The material of the pulley shall comply with the provisions of HT200 in GB9439. If other materials are used, their mechanical properties shall not be lower than the corresponding values ​​of HT200.
5.1.3 The pulley shall not have casting defects such as slag inclusion, shrinkage, looseness, cracks, etc. 5.2 Machine body and end cover
The material of the machine body and end cover shall comply with the provisions of HT200 in GB9439: If other materials are used, their mechanical properties shall not be lower than the corresponding values ​​of HT200.
5.2.2 The machine body and end cover shall not have casting defects such as slag inclusion, shrinkage, looseness, cracks, etc. 5.2.3 The body and end cover shall be subjected to aging treatment. 5.2.4 The machining accuracy, geometric tolerance and surface roughness of the body and end cover shall comply with the relevant provisions of GB9147. 5.2.5 The body shall not leak oil.
5.3 The materials, properties and machining accuracy of the worm, worm wheel and worm wheel shaft shall comply with the relevant provisions of GB9147. 5.4 The assembly and lubrication of the reducer shall comply with the provisions of the precision clauses in GB9147. The load-bearing capacity of the reducer shall comply with the provisions of Appendix A (Appendix to the standard). 5.5
6 Test methods and inspection rules
6.1 Test methods
6.1.1 The test of the reducer shall be carried out in accordance with J35558. 6.1.2 When the reducer is subjected to performance and fatigue tests, it is allowed to use an installation type that is compatible with the test conditions and has equivalent performance instead. 6.2 Inspection rules
6. 2.1 All reducers shall be subject to factory inspection before delivery, and the inspection items shall comply with the provisions of Table 4. 6.2.2 Type inspection of reducers shall be carried out when one of the following situations occurs: a) trial production and identification of new and old products for transfer production; b) when there are major changes in product structure, materials, and processes that may affect product performance; c) when the national quality supervision agency proposes a requirement for type inspection. 525
The inspection items for type inspection are shown in Table 4.
Inspection items
Basic parameters
Structural dimensions
Main parts materials and accuracy
Assembly accuracy
No-load and treadmill tests
Performance tests
Fatigue tests
Note: "two" means items exempt from inspection, and "ten" means items required for inspection. JB/T 7848
Factory inspection
Type inspection
Technical requirements
Chapter 1 of this standard
Chapter 3 of this standard
Chapter 5 of this standard
6.2.3 The sampling plan and judgment rules for the inspection of reducers shall be packaged, transported and stored in accordance with the relevant standards or the requirements of the type inspection unit
7.1 The outer surfaces of the reducer shaft extension and keys shall be coated with anti-rust grease and shall be tightly wrapped and bundled. 7.2 The transmission parts of the reducer shall be coated with lubricating grease. 7.3 The packaging and transportation of reducers shall comply with the provisions of GB/T13384 and GB191. 7.4 During transportation and storage, attention should be paid to waterproofing and anti-corrosion, and the reducer should be kept 1m away from heating devices. 626
JB/T784 8
—1995
Appendix A
Carrying capacity of reducer
(Appendix of standard)
The motor model, power P1, V-belt model and output torque T of the reducer shall comply with the provisions of Table AI. A1
The allowable load at the end of the output shaft of the reducer and the determination method shall comply with the provisions of C4 in Appendix C of GB9147. A3The actual transmission ratio of the reducer worm gear pair can be found in Appendix B of G139147, Table Al
Nominal transmission ratio
Specification model
Lew100
Motor power
Motor model
Y112M-4
Y1001.2-4
Y1001.1-4
Y90S-4
Y802-4
Y132S-4
Y112M-4
YI00L1-4
Pulley diameter
Output speed
Output rotation year
Specification model
ICWI60
Nominal transmission ratio
Motor power
JB/T 7848
Table A1 (continued)
Motor model
Y160M-4
Y132M-4
Y132S-8
Y112M4
Y180M-4
Y160L-4
Y160M-4
Y132M-4
Y132S-4
Y200L-4
Y180M-4
Y160M-4
Y132M-4
True pulley diameter
Output speed
r/rnin
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