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 cone-envelope 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 7847-1995 Vertical cone-envelope chrome cylindrical worm reducer JB/T7847-1995 Standard download decompression password: www.bzxz.net

JB/T7847
This standard is the first mechanical industry standard for vertical cone envelope cylindrical worm reducers formulated by China. The standard reducer adopts a cone envelope cylindrical worm transmission, so its load-bearing capacity reaches the advanced level of similar foreign products, which helps to eliminate the low performance and chaotic specifications of domestic products. In the process of formulating this standard, the main reference and reference to JB/T5559-91 and the relevant technical requirements and basic parameters of cone envelope cylindrical worm reducers 3 are cited. Appendix A of this standard is the standard's annex. This standard was proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery. This standard was drafted by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery. The main drafters of this standard are: Yang Jun, Zhao Liang, and Zhang Kai. 610
Machinery Industry Standard of the People's Republic of China
Vertical Conical Envelope Cylindrical Worm Reducerbzxz.net
1 Subject Content and Scope of Application
JB/T 7847...1995
This standard specifies the basic parameters, models, markings, dimensions, technical requirements and load-bearing capacity of vertical conical envelope cylindrical worm reducers (hereinafter referred to as 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 to +40°C, and the altitude does not exceed 1000m. When the working environment temperature is lower than 0°C, the lubricating oil must be heated to above 0°C before starting, or a lubricating oil with a low freezing point should be used. The reducer can run in both forward and reverse directions. 2 Reference 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. All parties using this standard should explore the possibility of using the latest versions of the following standards GB191-85 Packaging storage and transportation graphic symbols
GB 9439-881
Gray cast iron parts
GB10085-88 Basic parameters of cylindrical worm gear transmission GB 10087--881
Basic tooth profile of cylindrical worm
CB11544-89Dimensions of ordinary V-belts and narrow V-beltsGB/T13384-92General technical conditions for packaging of electromechanical productsZBK22007-88Technical conditions for Y series (IP44) three-phase asynchronous motorsJB 5558-91
Loading test method for worm reducers
Cylindrical worm reducers with cone envelope
JB/I 5559—91
3 Model, marking, and size
3.1 Model
The model of this reducer is represented by the letters LKW, where L indicates that the structure of the reducer is vertical, K indicates that the worm gear profile is K1-shaped, and W indicates a worm reducer.
3.2 Marking
3.2.1 Marking method
Standard number
Motor model
-Cooling method code
Nominal transmission ratio
-Reducer center distance
Approved by the Ministry of Machinery Industry of the People's Republic of China in 1995-1201 and implemented in 1996-07-01
3.2.2 Marking example
3.3 Model and size
JB/T7847..-1995
IB/T 7847
The type and size of the reducer shall comply with the provisions of Figure and Table 1. 0
Standard No.
Motor Model
-Fan Cooling
Nominal Transmission Ratio (1
-Reducer Center Distance c125mm
Vertical Conical Envelope Cylindrical Worm Reducer
JB/T 7847-1995
00 028
s-81-1
001 ~26
lo1so9s
astlots
osvols
JB/T7847
oto182
857662
926 1~982 1
128 19221
gurool
009099
4 Basic parameters
JB/T7847—1995
4.1 The center distance of the reducer shall comply with the provisions of Table 2. The nominal transmission ratio of the reducer shall comply with the provisions of Table 3. 4.27
4.3 The motor used for the reducer shall comply with the provisions of ZBK22007, and other types of motors may also be used according to user requirements. 4.4
The basic parameters of the reducer worm pair shall comply with the provisions of GB10085. 4.59
The tooth profile of the worm is K, and its basic tooth profile shall comply with the provisions of GB10087. Tooth profile parameters: tooth pre-height coefficient h: = ";
Top clearance coefficient = 0.2;
Grinding wheel production angle α = 20°.
Center distance u
Transmission ratio:
4.6The direction of the worm helix 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 (B11544, 225
5.1.2 The pulley material shall comply with the provisions of HT200 in GI39439. If other materials are used, their mechanical properties shall not be lower than the corresponding values ​​of 1T200.
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
5.2.1 The machine body and end cover materials 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 inclusions, shrinkage holes, looseness, cracks, etc. 5.2.3 The machine body and end cover shall be subjected to aging treatment. 5.2.4 The T-precision geometric tolerance and roughness of the machine body and end cover shall comply with the relevant provisions of JB/T5559. 5.2.5 The machine body shall not leak oil.
5.3 The materials, properties and processing accuracy of the worm, worm wheel and worm wheel shaft shall comply with the relevant provisions of JB/T5559. 5.4 The assembly and lubrication of the reducer shall comply with the relevant provisions of JB/T5559. 5.5 The load-bearing capacity of the reducer shall comply with the provisions of Appendix A (Appendix to the standard). 6 Test methods and inspection rules
6.1 Test methods
6.1.1 The test of the reducer shall be in accordance with JB5558 6.1.2 When the reducer is subjected to performance fatigue test, it is allowed to adopt 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 subjected to factory inspection before delivery, and the inspection items shall comply with the provisions of Table 4. 615
JB/T7847--1995
When one of the following situations occurs, the reducer shall be subjected to type inspection: trial production and identification of new and old products for production; a.
When there are major changes in product structure, materials and processes that may affect product performance; when the quality supervision agency of the country proposes a requirement for type inspection. The inspection items of type inspection are shown in Table 4.
Inspection items
Basic parameters||tt ||Structural dimensions
Main parts materials and accuracy
Assembly accuracy
No-load, running-in test
Performance test
Fatigue test
Note: "一\" means exempted items, "十" means mandatory items Inspection category
Export inspection
Type inspection
Chapter 4 of this standard
Chapter 3, 3 of this standard
Chapter 4 of this standard
Chapter 5 of this standard
JB53558
6.2.3 The sampling plan and judgment rules for the inspection of reducers shall be carried out in accordance with the relevant standards or the requirements of the type inspection unit. Packaging, transportation, storage
7.1 The outer surface of the reducer shaft extension and key 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, storage and transportation of the reducer shall comply with the provisions of GB/T13381 and GB191. 7.4 During transportation and storage, attention should be paid to waterproofing and corrosion prevention. The reducer should be kept 1m away from the heating device. 616
JB/T7847..1995
Appendix A
Carrying capacity of reducer
[Standard requirements)
The motor model, power P, V-belt model and output torque T of the reducer shall comply with the provisions of A1. A1
The allowable load at the end of the reducer output shaft and the determination method shall comply with the provisions of A4 in Appendix A of JB/T5559: A2
A3The actual transmission ratio of the reducer worm gear pair can be found in Table A1 in Appendix 8 of JB/T5559
Specification model
LKW100
Nominal transmission ratio||tt| |Motor power
Motor model
Y100L.1-4
Y9oS-4
Y802-4
Y132S-4
Y112M-4
1Y1001.24
Y1001.1-4
Pulley diameter
Output speed
Transmission speed
Specification model
1KW160
LKW180
Nominal transmission ratio
Motor power
JB/T 7847... 1995
Table A1 (continued)
Motor model
Y160M-4
Y132S-4
Y112M-4
Y1001.2-4
Y180M-4
Y160M-4
Y132M-4
Y132S-4
Y112M-4
Y180M-4
Y160M-4
Y132M-4
True pulley diameter
Output speed
Output rotation speed
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