This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of shaft-mounted reducers. This standard is applicable to parallel shaft and involute cylindrical gear reducers with zigzag axis arrangement. JB/T 7337-1994 Shaft-mounted reducer JB/T7337-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Shaft-mounted reducer
Subject content and scope of application
JB/T 7337
Replaces ZB1101:
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of shaft-mounted reducers. This standard applies to parallel shaft and involute cylindrical gear reducers with zigzag axis arrangement (hereinafter referred to as "reducers"). 2 Reference standards
GB6404 Determination of sound power level of gear device noise GB9439 Grey cast iron parts
G10095 Involute cylindrical gears
GI3/T13306 Labels
GB/T 13384
General technical conditions for packaging of electromechanical products
3 Types and basic parameters
3.1 Types
Reducers are divided into unidirectional rotation (with check device) and bidirectional rotation according to the direction of output shaft rotation; they are divided into blind cover and through cover according to the end cover type; they are divided into key connection and expansion ring connection according to the connection force type; they are divided into left installation and right installation according to the input shaft assembly type: the types and codes of reducers are shown in Figure 1 and Table 1.
Rotation direction code
Output shaft end type code
Input shaft assembly type code
3.2 The basic parameters of the reducer shall comply with the provisions of Table 23
3.3 The shape and installation dimensions of the reducer shall comply with the provisions of Figure 2 and Table 3. Approved by the Ministry of Machinery Industry of the People's Republic of China on July 18, 19945
7995-07.01 Implementation
JB/T 7337—94
Rated output torque/(N·m)
Rated backstop torque/(V·m)
Mass/kg
Nominal transmission ratio
3.4 ​​Model indication method
Marking example
JB/T 7337
10.11.2,12.5,14.16.18,20.22.4.25.28.31.5.35.5.46Input shaft installation type code: Y-)
Right installation. ZLeft installation
Hollow output shaft end cover type code: M·Valve cover. T-·Through cover 2J633
Rotation direction code LTwo-way. S-Clockwise one-way. N· Counterclockwise one-way
Nominal transmission ratio
-1/10 of rated output torque
A shaft-mounted reducer code
Rated output torque is 1600N·m, nominal transmission ratio is 10. Clockwise one-way rotation, the output shaft end cover is a through cover, and the input shaft is right-mounted shaft-mounted reducer:
Reducer ZJ160-10ST-Y
JB/T 7337-94
4 Technical requirements
4.1 Working conditions
JB/T7337
Continued Table 3
125487
The working environment is 20～10 (): When the ambient temperature is lower than (, the lubricating oil should be heated before starting: a.
The maximum input speed is 1500r/min:
Can rotate in both directions or in one direction: 4.2 Front and rear casing
4.2.1 The cast iron parts of the front and rear casings shall comply with HT200 in (GB9439. 4.2.2 The front and rear casings shall be pulled to eliminate internal stress. 4.3 Gears and gear shafts||tt ||The tooth surface roughness Rα of gears and gear shafts shall comply with the provisions of Table 4. 4.3.1
Number/mm
Pitch circle true
Diameter/mm
2200-~400
4.3.2 Tooth surface hardness
The tooth surface hardness of gear shaft is 50～55HRC;
The tooth surface hardness of gear is 45～50HRC.
4.3.3 The gear accuracy shall comply with the provisions of Table 5, Table 5
Gear bite peripheral speed/(m/s)
Accuracy (G10095)
4.3.4 Gear pair contact spot: tooth height is not less than 35%. Its length is not less than 60%. 4.4 Performance in use
The rated output torque of the reducer under steady load and continuous operation shall not be less than that specified in Table 2. 4.4.2
The short-term overload capacity allowed by the reducer is 2.5 times the rated output torque. The efficiency of the reducer shall not be less than 0.94
The reducer shall meet the following requirements after idling: All connectors and fasteners shall not be loose;
No oil seepage at all seals and joints;
The operation shall be smooth and normal, without impact and abnormal noise, and the noise shall not be greater than that specified in Table 6, 180
Noise value
JB/T 7337--94
2163-23160
4.4.5 Under normal use conditions, the temperature rise of the lubricating oil of the reducer should not exceed 50 (. 4.4.6 The cleanliness of the reducer should not exceed the requirements of Table 7 Table 7
Impurity content Dong
4.4.7 For reducers with a check device, the check should be reliable. 4.5 Failure criteria for reducers
Gears have cracks and broken teeth;
Tooth surface wear exceeds 1/20 of the tooth thickness;
ZJ250-ZJ630
ctB(A)
The total area of ​​pitting on the tooth surface exceeds 10% of the effective area of ​​the tooth surface ; The maximum size of each pitting pit exceeds 3mm; The maximum width of the pitting zone exceeds 3m
4.6 The non-machined surface of the inner wall of the reducer casing should be painted with oil-resistant paint, and the exposed non-machined surface of the casing should be painted with one layer of primer and two layers of topcoat. The paint film should be uniform and must not have defects such as paint flow and paint leakage. 4.7 Quality Assurance
If the user complies with the storage, installation and use rules of the reducer, within 18 months from the date of shipment from the manufacturer, of which the use period does not exceed 12 months, if the product is damaged or cannot work normally due to manufacturing quality, the manufacturer shall replace or repair it for the user free of charge. 5 Test Methods
5.1 Cleanliness Determination
5.1.1 Filter Specifications The scale is 200 days/inch, the division value of the analytical balance is 1mg, and the cleaning liquid is solvent kerosene or gasoline. 5.1.2 Soak the filter in the cleaning liquid for 5 minutes and then take it out. After the cleaning liquid evaporates, put it in an oven with a temperature of 120C ± 5 (. Bake for 30~~40 minutes, take it out, put it in a desiccant and cool it for 15~20 minutes, and then weigh it. 5.1.3 Put the cleaning liquid into the reducer to the lowest oil level line, and the reducer will run forward and reverse at an input speed of 1000r/min (the reducer with a check device only runs in one direction) for 3 minutes, then stop and release the cleaning liquid. Add clean cleaning liquid again to rinse until oil drips intermittently.
Put the clean Filter the washing liquid with a filter, disassemble the casing, and check whether there are impurities in the dead corners and oil drain holes in the casing. After filtering, the filter with impurities shall be dried and weighed according to the provisions of 5.1.2. 5.1.5
The mass of impurities shall be calculated according to formula (1):
Am=m2-m;
+:Am—
The mass of impurities, mg;
·The mass of the filter, mg;
The mass of the filter with impurities, mg.
5.2 No-load test
After the reducer is assembled, each unit must be subjected to a no-load test with continuous operation of 1 force in both forward and reverse directions at the rated speed (those with a check device can only be operated in one direction).
5.2.1 Test the noise according to the provisions of GB6404. 5.2.2 The reducer with a backstop device shall be subjected to a load test according to the requirements of formula (2) for 100 backstop performance tests. The operation shall be reliable. FM/e
In the formula; - test load. N
JB/T 7337--94
M-rated backstop torque (see Table 2), N·me----the center distance from the output shaft hole to the tightening hole (see Figure 2) m. 5.3 Load test
After the no-load test is passed, the rated load of 25%, 50%, and 75% shall be tested at a rated speed of 750-1500r/min, and each level shall be operated for 1h. Then the test shall be carried out at 100% of the rated load until 2h after reaching thermal equilibrium. 5.3.1 Test requirements:
No damage to the machine parts:
h. Check the contact spots on the gear tooth surface. There should be no eccentric load. 5.3.2 Test the transmission efficiency of the reducer under rated load: The reducer is subjected to the rated output torque at an input speed of 1000r/min. When the housing temperature reaches thermal equilibrium, read the micro-strain value of the torque sensor from the strain gauge every 8 minutes. Measure 5 times in total and calculate the efficiency of each measurement according to formula (3): unki/(ukoin)
Wu Zhong:
are the micro-strain values ​​of the output and input torque sensors respectively; are the correction coefficients of the output and input torque sensors respectively:,…actual transmission ratio of the reducer;
-The efficiency of the support between the reducer and the output torque sensor is taken as 0.995, and the arithmetic mean of the 5 efficiency values ​​is taken as the efficiency of the reducer.
5.4 Overload test
After the load test is passed, an overload test is carried out. After running at 150% and 200% of the rated load for 1min, it is run at 250% of the rated load for .5min, and then stopped after unloading. All parts of the reducer are not damaged. 5.5 Fatigue life test wwW.bzxz.Net
The reducer runs at an input speed of 1000r/min, withstands the rated output torque, and the input shaft gear stress cycle number reaches 5×10° times. After unloading, the reducer is stopped and shall not fail. 6 Inspection rules
6.1 Factory inspection
6.1.1 The reducer shall be inspected and qualified by the manufacturing inspection department and a certificate of conformity shall be issued before it can be shipped. 6.1.2 Factory inspection items:
No-load test (including sealing):
Check performance;
Noise:
Cleanliness;
Contact spots of gear pair
Among them: Check performance, noise and cleanliness are random inspection items. Before each batch of reducers (divided by the production order number of the manufacturer) leaves the factory, 2% of the reducers shall be randomly sampled, but at least one shall be tested. If there are unqualified items in the random inspection, double re-inspection shall be carried out. If they are still unqualified after double re-inspection, they shall be tested one by one.
6.2 Type inspection
6.2.1 Type inspection shall be carried out in the following cases: a.
Trial production of new products;
When there are major changes in the materials and structures of major parts;
When there are major changes in the processing technology of major parts; When production is resumed after two years of suspension; e.
JB/T7337--94
When the national quality supervision agency puts forward the requirement of type inspection. Type inspection items
All inspection items:
Load test;
Overload test;
Fatigue life test.
Marking, packaging, purchase and storage
The reducer shall be fixed with product labels, rotation signs and lubrication signs in accordance with GB/T13306 in obvious positions. The content of the product label shall include:
Product model and name;
Rated output torque;
Product weight;
Manufacture date;
Production number;
Manufacturer name.
The packaging of the reducer shall comply with the provisions of GB/T13384. The random documents shall include the certificate of conformity, instruction manual and packing list. The random documents shall be sealed in a plastic bag and then placed in the packaging box. 7.3
The storage of the reducer shall be protected from moisture.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Zigong Conveying Machinery General Factory. The main drafter of this standard was Lv Zeying.
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