JB/T 9827-1999 This standard is a revision and merger of NJ 380-85 "Technical Conditions for Tractor Transmission" and NJ 381-85 "Test Methods for Tractor Transmission Bench" (part). Compared with NJ 380-85, the following major technical contents have been changed: - The requirement that the transmission must be used for no less than 6000 hours before the first overhaul is cancelled; - A 1200-hour test is conducted according to the JB/T 9838-1999 rapid endurance test. This standard specifies the technical requirements, test methods, inspection rules, marking, transportation and storage of tractor mechanical gear transmissions. This standard applies to tractor mechanical gear transmissions, and gearboxes can be implemented as a reference. This standard was first issued on the date of year. JB/T 9827-1999 Technical Conditions for Tractor Transmissions JB/T9827-1999 Standard download decompression password: www.bzxz.net

IC5 65.060.10
Machinery Industry Standard of the People's Republic of China
JB/T9827-1999
Tractor transmission box
Technical conditions
Tractor transmissionSpecifications1999-08-06 Issued
State Machinery Industry Bureau
2000-01-01 Implementation
.HT The 9827 [999] standard is a combination and revision of the contents of N380-85: Technical Specifications for Tractor Transmission Boxes and NJ381-8: Test Methods for Tractor Transmission Boxes on Bench. This standard has the following changes from NJ380-85: The service life of the transmission box before the first overhaul should not be less than 600 hours: According to the JB.T9838-1999 rapid endurance test, the 1200-hour reverse test is carried out. This standard replaces the contents of N380-85 and N381-85 from the date of implementation. The standard was proposed by the National Machinery Standardization Technical Committee and the initiators of this standard are: Shanghai Excavator Gear Factory and Xiaoyang Tractor Research Institute. The main contributors to this standard are: Lin Jixing and Zhang Zhiqiang. Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Tractor TransmissionbzxZ.net
Tractor Transmission Specifications JHF9827-1999
N3885
This standard specifies the technical requirements, test methods, inspection rules, marking, transportation and storage of tractor transmissions. This standard applies to tractor transmissions, and gearboxes can be used as references. 2 Reference Standards
The provisions contained in the following standards are incorporated into the provisions of this standard by reference in this standard: This standard is valid at any time, and all minor versions are valid. All standards will be revised. The service provider using this standard should consider the possibility of using the latest version of the following standards. BT2828-198 Pallet-by-pallet inspection counting and sampling sequence and sampling table (applicable to continuous batch inspection GRT3871--1993 Clothing industry wheeled and belted tractor test piece method GE/T37851983
JB/T 5673-1991
JB/T8299-1999
J898381999
Electrical and production performance and test methods of sound and sound meter for agricultural tractors and their paint avoidance technical conditions for the maintenance of tractor transmission efficiency
Tractor transmission system speed durability test method Agricultural machinery product repair, replacement, return responsibility regulations 3 Technical requirements
3.1 The transmission box shall comply with the requirements of this standard, and its components shall be manufactured according to the drawings and technical specifications approved in the prescribed procedures, and comply with the provisions of relevant standards.
3.2 The transmission box shall comply with the provisions of IEC6005673. 3.3 The transmission box shall not have oil stagnation, and mud and water shall not fall into the transmission box. 3.4 The transmission box shall not have abnormal noise during operation. 3.5 The manual operating force during gear shifting shall not exceed 120N. 3.6 The gear shifting of the transmission box shall be flexible and reliable, and there shall be no belt jam, mismatch, or gear slippage. 3.7 The efficiency of the transmission box shall comply with the relevant standards. 3. Under the rated engine working conditions, the transmission box shall run continuously for 2 hours, and the oil temperature shall not exceed 10% of the factory specified value. 3.9 The noise level of the transmission box during air-conditioning operation shall not be greater than 88% (4) 3.10 The transmission box should be able to pass the 1210h rapid endurance test. No parts are allowed to be damaged after the test. 3.11 Under the conditions of installation, use, storage and transportation according to the requirements of the instruction manual, the warranty period of the transmission box of tractor with a capacity of 1kW or above is 2 years from the date of delivery, and 1.5 years for 1W and below. If the transmission box is damaged or cannot be used normally due to the manufacturer's negligence, the manufacturer shall bear the responsibility in accordance with the "Regulations on Repair, Replacement and Return of Agricultural Machinery Products". Approved by the Beijing Machinery Industry Bureau on August 6, 1999 and implemented on January 1, 2000
4 Test method
4.! Test conditions and requirements
JB/T9827—1999
4.1.1 The test sample must be a product that has passed the inspection. 4.1.2 The brand and commercial grade of the lubricating oil used in the transmission box shall comply with the requirements of the instruction manual. 4.1.3 Before the test, the reverse running-in shall be carried out in accordance with the provisions of GB 3871. 4.1.4 When there is a reduction device between the transmission box input and the engine, the transmission ratio, rotation direction and transmission efficiency shall be considered. 4..5 The recording and processing of the test data shall be accurate and reliable. 4.1. 6 Before the test, a test outline should be prepared. After the test, a test report should be written. 4.2 Oil temperature test
4. 2. 1 Test conditions
8) The test equipment shall be an open or closed test bench: 6) The temperature of the measuring device shall be measured with an accuracy of not less than 2.0%: c) The indoor air temperature of the test room shall not exceed 35, and no additional oil temperature regulating device shall be added 4.2.2 The input shaft input speed shall match the calibrated speed of the tractor engine. 4.2.3 The input shaft input torque shall match the calibrated torque of the tractor engine. 4.2.4 Transmission box position selection
a) For wheeled machines, the speedometer shall be close to 7km/h; b) For belt tractors, the speedometer shall be close to 5km/h; c) For tractors, the speedometer shall be close to 4km/h. 4.2.5 The temperature shall not be less than 2h during continuous operation (based on the temperature holding time) 4.2.6 The measuring plate shall be located on the inner side of the transmission box wall, and the thermometer probe shall be immersed in the lubricating medium 4.3 Original sound test
4.3. 1 Test system
4.3.1.1 The measuring site shall not allow any objects to be placed within 2m around the transmission box to be tested: if the surrounding area is outside 2m, such as noise, sound-receiving materials shall be placed to improve the measurement environment. 4.3.1.2 The transmission box shall be ensured to have sufficient installation rigidity. 4.3.1.3 The sound level meter shall be a municipal meter with an accuracy of 1 or above GBT3?85. 4.3.1.4 The accuracy of the speed measurement shall not be less than 1.0%. 4.3.2 The input shaft speed is the calibrated speed of the original tractor engine. 4.3.3 The test is carried out at no load and the calibrated torque of the engine. 4.3.4 During the measurement, the height of the microphone, the distance from the transmission case housing, and the measurement point layout are shown in Figure 1: In the figure, A, A, and A are the four measurement points of the microphone respectively. H is the height of the center line of the shaft from the ground, and the number is not less than 0.4m: A, A, and A are the measurement points on the same plane of the height H. A, and the measurement point is above the transmission case. 1 is half of the total length. The average distance between each measurement point and the transmission case housing is 4.3.5 This standard uses A-weighted network readings. The microphone is used at each measurement point to measure the transmission case. The reading of the sound level meter is taken as the average value of the needle movement within the period. The occasional large value or minimum value is not considered. 2
JB/T9827-1995
4.3,6 When measuring each point, the background noise of the disc should be measured first. The difference between the sound level measured during the transmission box test and the required sound pressure level of the outer bottom should be at least 6dBA, otherwise measures should be taken to meet this requirement. When the difference between the sound level measured during the transmission box test and the background noise sound pressure level is +10BA, the correction should be made according to Table 1. Table 1
The difference between the sound level measured during the test and the background noise pressure level is 6
4.4 Test results
4.4.1 Record the noise output value of each measuring point in each gear, the background sound peak value is invalid
1.4.2 Compare the noise values ​​recorded at each measuring point, and take the maximum value as the noise evaluation value of the transmission box. 4.5 Transmission efficiency test
Perform according to JB/T8299,
4.6 Rapid endurance test
Perform according to JB/T8299.
5 Inspection specifications
5.1 Each product must pass the factory quality inspection before it can be shipped! There should be documents proving the quality of the product. 5.2 Factory inspection is carried out according to 3.2~3.6. 5.3 Type inspection
5.3.1 Type inspection should be carried out in any of the following situations: a) New product trial production or old product transfer production; b) During formal production, the design, materials, and processes have changed significantly, which may affect the performance of the product; d) When the product is out of production for a long time and waiting to resume production. JO/T9827—1999
5.3.2 When the transmission is type tested in batches of quality products, two units shall be selected from the first batch of qualified products and tested in accordance with the provisions of Chapter 4. The test results shall comply with the provisions of Chapter 3.
5.3.3 The ordering unit has the right to conduct random inspections on the products received. The test items are optional. The sample size, quality and level of the inspection shall be determined in accordance with GB/T2828. The sampling rate and judgment rules can also be agreed upon by the supply and demand parties. 6 Marking, transportation and storage
6. [The product shall be marked with the following content on the assembly part (it is allowed to be omitted during manufacturing) a) Factory name, trademark and address;
b) Product model and name:
c! Manufacturing date and factory batch number:
6.2 The product shall be protected during shipment and shall be loaded and unloaded lightly to ensure that the surface of the chain and the number of parts and the external connection parts of the assembly are not damaged.
6.3 The product shall be placed in a ventilated and dry environment. Under normal storage conditions, there shall be no rust within 1 year from the date of shipment.
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