GB/T 3871.2-1993 Test methods for agricultural wheeled and crawler tractors Part 2: Determination of parameters of complete machine GB/T3871.2-1993 Standard download decompression password: www.bzxz.net

UDC531.371 -629.114.2
National Standard of the People's Republic of China
GH/T3871. 1~3871. 12—93
Test methods for agricultural wheeled and tracklaying tractorsTest methods for agricultural wheeled and tracklaying tractors1993-03-03 Issued
1993.10-01 Issued
National Bureau of Technical Supervision of the People's Republic of China
Test methods for agricultural wheeled and tracklaying tractorsPart 2: Measurement of iractor parametersGB/T3871.2-93
Replaced GB 3271--H3
This standard refers to Part 6 of the test method for agricultural tractors, ISO 30789/G1982. 1 Main content and scope of application
This standard specifies the method for testing the whole agricultural wheeled and belted tractors. This standard applies to agricultural wheeled and belted tractors: 2 Referenced standards
GB/T3871: Test methods for agricultural wheeled and belted tractors 1. General requirements 3 Terminology
3.1 Clearance refers to the distance from the ground where the crop passes under the machine body during tillage operation. 2 Test equipment and accuracy 1.1 Test equipment
must have. lb production, rubbing pendulum test bench, steel ruler, closed level, single angle gauge, along the hammer, capacity and wheel pressure gauge,
center. 2 Multi-effect shop
tons meet the following requirements: distance height = 0.6%, center of mass ± .5%, force ± 1.55 and wheel center of air bed 5. 5 Test object wwW.bzxz.Net
5.1 The technical signature and test general requirements of the shop are as follows: GE1.1? Talk about the test on the pulling machine belt (including the single year and wheel filling). It should be the maximum quality specified by the manufacturer. S. When the machine is in the specified position, it should be placed on the horizontal position and in the state of pulling alone. The pull rod should be in the water-buying state. 5.4 The test rate is measured in the intermediate position. The driver is placed in the driver's seat with a mass of 6. E test method
according to the following parameters. 6. The whole size
of the tractor is measured in the state of belt distribution, mainly parallel to the center plane of the belt and the small size of the front and rear dry air filter force upward, and the total height of the vertical height of the middle part (excluding the belt puller). See the summary table and letter for the measurement. 6.2 Full filling volume
When measuring the overflow volume of each component listed in the new summary, the device shall receive the measured components and all the possible diameters of the tested components and their paths. Then their quality shall be calculated respectively.
Approved by the State Technical Supervision Bureau in 199303-03
Implementation in 1953-10-0
Full mass and center of mass coordinates G1/T 3871.2-93
The mass and center of mass coordinates of the tractor shall be determined in two states: without counterweight and with counterweight respectively. The actual measurement results show that the center of mass of the tractor is aligned with the actual pressure drop. See Figure 1 for the standard distance from the center of the driving wheel axis to the bottom of the engine (for those who connect the front door of the engine, the center of mass is half the center of the engine as the standard, and the center of mass is the standard for the engine store).
The tractor quality can be directly measured by various weighing devices, Figure 2, appropriate center of mass (and, is based on the lack of measurement results, 7, 1 case listed in the public I calculated. The center of mass coordinates are the reference for the measurement method of the machine center of mass height determination and reporting method), under the condition of the fuel weight, other suitable pressure methods can also be used, L
Figure 1 Tractor whole machine small intention
Pure kinetic energy center
Figure? Schematic diagram of the center of mass coordinates of the tractor 7 Test results and report
. The following formulas are used to calculate the tractor quality standard
7.1.1 Center of mass length 2
For grab tractors
For brand damage lifting machines
GB/T 3871. 2—93
Controlled tractor center of mass quotient driving wheel center of mass horizontal distance, mI
Wheel tractor front light ground vertical bearing reaction: tractor use quality.kR
Center flat plate single point about ground support force (with tractor), N: 2,
Special flat plate front point ground support reaction force (without signal 2N: continental force point fulcrum horizontal distance, mm
7.1.2 Center of mass some standards
For wheeled tractors (front and rear wheel track is similar) and single wheel tractors, the following formula is used: * The longitudinal center of mass of the tractor is 1/2 in mm, and the longitudinal center of mass of the tractor is 1/2 in mm; * The longitudinal center of mass of the tractor is 1/2 in mm, and the longitudinal center of mass of the tractor is 1/2 in mm; * The longitudinal center of mass of the tractor is 1/2 in mm, and the longitudinal center of mass of the tractor is 1/2 in mm. For three wheel tractors, the following formula is used to calculate the center of mass height of the tractor: 1.1.3 See Appendix A for the calculation formula of the center of mass height 1.7.2 Make a summary table of all the measurements and the record keeping stations, and write a single test report in accordance with the relevant provisions of G337.1. Summary table of the measurement results of the tension machine parameters Price standard location
Tire TA: front dead
Quality standard sheet;
Date
KLU energy,
Lucky element transfer
To exhaust craftsman
Test chamber number
Axle Institute.mtm||tt ||Model section technology [
Art Institute H..mE
Section small separation
The ground can be
Effective value-u:
Equipment
Injection volume standard meter:
Measurement item
Lingque government
Engine clean oil
Actuator along the lubricating oil
Integration and centroid measurement tool
All
GB/T 3871.2 93
The most dynamic
Liquid jade system sliding
The active method of the system
With counterweight
The heart sits
Measurement play
Front end release
Front single decision
Rear wheel axle decision
With insect
CB/T 3871.2-93
Attached scene A
Determination of tractor mass center height
(Learn to learn oxen)
On a special month test bench, its schematic diagram map A1. Focus on the support
sleep to know the test center
push the control with the new center
ban to open and close
Figure 1 The method of probing and shaking the bottle filling machine is to determine the height of the machine. The surrounding area is more determined by the type of the machine. The quality of the machine is measured by the north example. The center of mass is paid to the standard. And to the source of the swing frame on the level. Make the towing control Kai more heart! The center line of the multi-temperature end mold frame will surround the tractor, put the long section of the frame in the alarm state, and then make the whole frame sticky and rise, read the white slightly higher, and then remember the hot lift at this time, and then put down the exploration frame, so that it can be driven by the sound of the garbage sound, the above drive, and then measure the check and swing again. At this time, according to the formula (A1), the height coordinate point of the center of mass of the towing machine is calculated: 44a -.+m,iHi-H).
B=T(wR,TmH-TmRE+m,RH,)
C=ni.(TT)-K,(HH)
The more the test towing quality:
The first test of the safety cycle;
The test measured the grip cycle s
The required quality.kg!
GB/T3B71.293
1, H, H are the distances from the center of mass of the swing frame to the suspension frame during long and short swing, mm: H, - are the distances from the plane of the swing frame to the suspension frame during long and short swing, mmJ.— are the moment of inertia of the swing frame itself during long and short swing, kgnm. Additional remarks:
This standard is issued by the Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of the People's Republic of China. This standard is issued by the Machinery and Electronics Industry Ministry of China.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.