GB/T 3871.3-1993 Test methods for agricultural wheeled and crawler tractors Part 3: Power take-off shaft power test GB/T3871.3-1993 Standard download decompression password: www.bzxz.net

UDC531.371 629.114.2
National Standard of the People's Republic of China
GB/T 3871. 1~3871. 1293
Test methods for agricultural wheeled and tracklaving tractors1993-03-03 Issued
1993.10-01 Issued
National Standard of the People's Republic of China
Test methods for agricultural wheeled and tracklaving tractorsPart 3: Power take-off shaft power test
Test mcthuds for dprieuliural wheelel and tracklaring traclorsPnri 3:FTO Fower tesls
GBT 387:3-93bZxz.net
GEST:
Power output shaft
This standard refers to the International Standard 150789/11990 Agricultural tractor test method, etc. Part 1
1 Subject content and scope of application
This standard specifies the test method for the performance of the output shaft of agricultural wheeled tractors. This standard is applicable to agricultural crawler and crawler tractors. Reference standards
Agricultural tractor output shaft
GH371.1 Agricultural tractor and crawler tractor test method Part 1 Requirements 3 Test equipment and measurement accuracy 3.1 Test equipment
Mainly include: power consumption meter, tachometer, timer, thermometer, temperature meter, gas meter, etc. 3.2 Parameters of test length deformation
should meet the following requirements: 1.5% to 1.1% return time = 1.2%, 0.6% to 0.6%, flame retardancy: 2.C, wet bulb temperature ±.5, air pressure 0.2ka4 Test condition
4 1 The recommended conditions for test tension and the general deformation conditions for test should comply with all relevant provisions of GB 361.1. 4.2 During the test, the towing engine should be stopped or stored with water. The towing engine should be on the ground. The transmission shaft connected to the dynamometer should be raised at any point. 4.3 The ambient temperature of the test site should be 23 ± 7. The positive force should not be less than 9i, kPa. When the engine height is limited and the pressure requirement cannot be met, it is allowed to adjust the oil slightly to improve the engine working condition, but the adjustment condition should be A. 4.4 If the towing engine under test is connected to the test cabinet with the air change function, the device should not inquire about the engine's crime. 4.5 Any driver can increase the engine power without any tools during operation. 4.6 During the whole test, the fuel source should be about the same as the temperature of the machine under the condition of oil supply from the tank after 2h of the test, and the test time may be changed.
4.7 The determination of various temperatures is stipulated as follows: a. Open ambient temperature, with the tractor in front of the fan outlet, 2m outside the tractor, 1.5m high at both ends. Approved by the State Administration of Technical Supervision on March 3, 1993, implemented on October 1, 1993.
CB/T 3871.3 93
The fuel flow and the flow at the mass flow rate are measured to C. The lubrication temperature has a depth of oil in the engine oil bottom: d. The cooling volume wave is measured at the engine water 1: (for the risk engine. Dust factory power designated location is convenient): the air temperature: the vehicle leaves the engine or the engine air filter 5cm inlet A surface air according to the measurement basis, the temperature sensor should have a large flow feather heat installation.
5 Test and method
-to.4 The current items of the test, usually should be added, 5.: Uneven vehicle test
The engine door will open, the power output shaft is continuously and steadily increased Load. Make it reach the maximum power condition, and continuously run under this condition, and then slide for 2r: measure the following valley fraction, speed, fuel consumption, fuel temperature, lubricating oil temperature, cooling filter temperature, intake air temperature, wind temperature, relative change of atmospheric pressure, etc.
If the result of each power measurement is compared with the average value, and the change exceeds ±2%, the whole test is repeated. If the result is still different from the result of the re-test, the difference should be included in the report. E.2 Full load variable seat test
The engine is fully opened, the load is 5, and the working condition is increased by one level until the maximum torque point is obtained. Each time the load is increased, wait for T. After washing, measure the parameters listed in 5.1 once. Pay attention to the engine speed as much as possible, and make sure that the engine speed is about 1% lower than the maximum speed. 5.3 Test the engine with full oil, and make sure that the following working conditions are met. Each working condition should be stable and run for 2mr. Measure the parameters listed in 5.1 once, and take the half-mean value of each time. The maximum power-free working condition of the rated speed:
b, 85K of the rated speed:
e. 5 specific conditions: 75:
additional distance of
e, item b: 25 :
【, the test device shall be disengaged if the torque is greater than the specified speed range) 5.4 When the engine is in controlled rotation or the output shaft speed is not the standard speed, the engine shall become a unique load and make the power auxiliary shaft output speed conform to the standard speed (4G or 1500r/mi at high power 1.ratio: 1. Special or.-series number in GB152. At this throttle opening, follow the provisions of Article 5.3 to carry out the load change test and change the item working condition to the power reduction speed. ". For a certain force output shaft, the thrust should be appropriate to its power level (see GB15). 5. For a tractor without a power section, the power output test is changed to an engine bench test. The engine shaft is connected to the measuring device, and the engine accessories (air filter, air muffler, water tank, etc.) should be installed when the engine is working. Then the test specified in Articles 1 to 5.3 is carried out. 6 Test results and report 5.1 According to the "test plan" formula, do not change the atmospheric conditions. Engine single speed
In the above formula: n
Engine crankshaft speed:
CB/T 387:3—93
Motor drive transmission:
n—power output shaft rotation, r/min.
b. Power output power
Where:
Power output shaft speed, kw,
Engine equivalent shaft torque
or:
Engine equivalent crankshaft torque.·n
d. Hourly consumption basis
Where: C—Engine hourly fuel consumption, kg/h.—fixed time.9 :
—the fuel consumed in a given time.
e. Fuel consumption rate of power output shaft
Where:
Power output shaft fuel consumption rate·g/kw·F. Torque duty coefficient
The reserve coefficient,
The power output shaft can work at rated speed for 1 hour: The average fuel consumption of the special load is H
x1 oco
, multi*
power output shaft variable load average lubrication rate /W·l: 1.3 medium variable load test measured small inch fuel consumption and, kR -- 3 medium variable load test measured power output beats square book, k penalty per thousand oil workshop
:,
vehicle fuel sleeve movement, kw.h..:
Fudian is C when the temperature is m
1OGGXY
6.2, calculate the average of the results of the preparation of 1, and use this as the test sales record summary, the test time and other parameters are also recorded, the output is as shown in the power The characteristic curve is obtained. Finally, the relevant current regulations of G ratio 3871.1 are used for the test.
6.3 does not violate the test of 5., and is handled in accordance with the new provisions of 6.1 and 6.2. The difference is that the power output shaft power P, engine equivalent torque T and power output shaft fuel consumption rate are respectively replaced by engine power F, engine speed T, and engine fuel consumption rate. 11
Above point
Maximum speed 2h
Change the test time
a. The maximum value of the calibration characteristic
b Average speed cabinet
Eb item torque
GH/T 3871.3-93
Power output acid test result summary table
Test date
Test coupon number
Type and speed (15 center)
Speed-F/min
Engine
: impulse test 15 or 1Xmi)
i. Maximum power
6.\Current enzyme determination
, the condition
and other standard transfer small plug-in power technology can be used under the annual efficiency curve auxiliary cabinet equivalent curve extraction control torque
local people and other happy curve independent control short engine speed||tt| |The maximum speed after the engine is set and the relative speed after the engine is set
The average air flow of the test wire:
Average speed
Please check the latest standard during the test
Atmospheric power
Reject wet sequence
Engine lubricating oil
6/kw+h
k/kw·h
Remarks:
Name of the responsible unit
Additional instructions:
GB/T 387.3-53
Engine use, (r/?
Village on the river
Fuel brand
This standard is proposed by the Ministry of Industry of the People's Republic of China and the Ministry of Machinery Industry. This standard is completed by the Ma Shi Machinery Standardization Technical Committee. Test B period
Average lubricating oil bullet number
Mu standard Shan Machinery Fuel Electronic Industry Tribe Yang Excavator Research Institute is responsible for the starting point of the world. It is called the crown of the people. Qian Jin. Shang Wang year.
（·/）5*
Test him!
Test the door
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