Some standard content:
ICS65.060.10
Machinery Industry Standard of the People's Republic of China JB/T5183—2002
Replaces JB/T5183—1991
Test method of hydrostatic steering system for wheeled tractors tractors2002-12-27 Issued
2003-04-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Foreword
1 Scope,
2 Normative references
3 Terms and definitions
4 Test requirements
4.1 Test equipment and instruments
4.2 Test oil,
Test preparation,
4.4 Others
5 Test methods,
Determination of steering parameters
Steering wheel operating torque test
Internal leakage test.
Pressure loss test
Manpower steering Steering performance test
High temperature internal leakage test,
Low temperature manual steering performance test
Durability test
Appendix A (Normative Appendix) Test equipment Hydraulic system schematic diagram
Appendix B (Normative Appendix) Typical test curves of tractor static hydraulic steering system A.1
Hydraulic system schematic diagram
Figure B.1 Steering wheel-steering knuckle arm angle displacement curve B.2 Steering wheel operating torque characteristic curve
Table 1 Measurement accuracy
JB/T5183-2002
This standard replaces JB/T5183-1991 "Test method for static hydraulic steering system of wheeled tractors". Compared with JB/T5183-1991, the main changes of this standard are as follows: one section of definition is added;
JB/T5183-2002
The instrument measurement accuracy is renamed as measurement accuracy. The measurement accuracy values of each parameter in Table 1 adopt the same level, and the accuracy requirements of the speed are modified;
In the steering parameter determination test, steering wheel operating torque test, internal leakage test, and durability test, the pressure at the steering gear outlet is specified as the system specified back pressure;
In the steering wheel operating torque test, the speed of the hydraulic pump is modified. Appendix A and Appendix B of this standard are normative appendices. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Tractor Standardization. The drafting unit of this standard: Luoyang Tractor Research Institute. The main drafters of this standard: Li Xiqin and Qi Jinfeng. This standard was first issued in 1991.
1 Scope
Hydrostatic steering system for wheeled tractors
Test methods
This standard specifies the test methods for the hydrostatic steering system for wheeled tractors. This standard applies to open-center or closed-center hydrostatic steering systems for wheeled tractors. JB/T5183—2002
Note: The hydrostatic steering system for wheeled tractors consists of a hydraulic pump, a hydrostatic steering gear, a steering cylinder, a fuel tank, a filter, various control valves, a cooler, and connecting pipes. (Hereinafter referred to as the steering system) 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions shall apply to this standard. GB/T3766--2001 General technical conditions for hydraulic systems (eqvISO4413:1998) 3 Code for solid particle pollution level of hydraulic system working medium (eqvISO440G:1987) GB/T14039-1993
3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
maximumoperatingtorque
Maximum operating torque
The steering wheel operating torque when the pressure at the inlet of the steering gear is the rated working pressure and the steering torque begins to rise significantly (manual steering phenomenon occurs).
Steering large cycle wholesteeringcircle The process of the steering wheel from the system neutral position → right dead center → system neutral position → + left dead center → + system neutral position. 3.3
Steering small cycle smallsteeringcircle The process of the steering wheel from the system neutral position → right 180° → system neutral position → + left 180° → system neutral position. 4 Test requirements
4.1 Test equipment and instruments
4.1.1 Schematic diagram of the hydraulic system of the test equipment (see Appendix A). 4.1.2
The test instruments shall be calibrated by the calibration department and shall be within the calibration period. 4.1.3
The measurement accuracy shall comply with the provisions of Table 1.
Table 1 Measurement accuracy
Name of measurement parameter
Angular displacement
Measurement accuracy
JB/T51832002
4.2 Test oil
4.2.1 In the bench test, the kinematic viscosity of the test oil shall be (42~74) mm2/s or consistent with the oil used in the tractor of the tested system. 4.2.2 Oil temperature: (65±5)℃ (except for high and low temperature steering performance tests). 4.2.3 Cleanliness level: The solid particle pollution level code of the test oil shall not be higher than 19/16 specified in GB/T14039--1993.4.3 Test preparation
4.3.1 Install all parts of the tested steering system, such as hydraulic pump, hydrostatic steering gear, steering cylinder, various valves, filters, coolers, etc., on the test bench according to the requirements of relevant technical documents. According to the layout of the test bench, the hydraulic pipelines on the original tractor can be installed in whole or in part on the test bench, and the remaining pipelines can be added separately. It is allowed to replace the hydraulic pump on the original tractor with the hydraulic pump on the test bench. 4.3.2 After the tested steering system is installed on the test bench, the length of the pipeline on each steering component shall not be greater than twice the length of the pipeline on the original tractor. The diameter of the newly added pipeline should be the same as that on the original tractor. 4.3.3 After the tested steering system is installed on the test bench, it should be run-in according to the running-in specifications specified by the manufacturer. 4.4 Others
Other requirements refer to the provisions of GB/T3766--2001. 5 Test methods
5.1 Steering parameter determination
5.1.1 Test conditions
The speed of the hydraulic pump is 50% of the rated engine speed, the pressure at the steering gear inlet is the rated working pressure, the pressure at the steering gear outlet is the system specified back pressure, and the steering wheel speed is 60r/min. 5.1.2 Test steps
Under the above conditions, mechanically rotate the steering wheel shaft to make the tested steering system complete a large steering cycle, and at the same time measure the steering wheel angle and the corresponding steering knuckle arm angle (for the folding steering tractor, it is the relative deflection angle of the front and rear frames), and draw the steering wheel-steering knuckle arm angle displacement curve (see Figure B.1). According to the angular displacement curve, find the following parameters: a) total steering wheel rotation angle (°);
b) the difference between the steering wheel rotation angle from the neutral position to the left dead point and from the neutral position to the right dead point (°); c) the free travel of the steering wheel from the neutral position to the left and right (°). 5.2 Steering wheel operating torque test
5.2.1 Test conditions
The speed of the hydraulic pump is 50% of the rated engine speed. The pressure at the steering gear inlet is the rated working pressure, the pressure at the steering gear outlet is the system specified back pressure, and the steering wheel speed is 60r/min. 5.2.2 Test steps
Mechanically rotate the steering wheel shaft to make the steering system under test complete a large steering cycle, measure the steering wheel angle and steering wheel operating torque, and draw the steering wheel operating torque characteristic curve (see Figure B.2). Check according to the curve: a) whether the curve is smooth and whether there are sudden changes or peaks; b) whether the operating torque increases significantly when approaching the left or right dead point, and find out the maximum steering torque of the steering wheel. 5.3 Internal leakage test
5.3.1 Test conditions
The hydraulic pump speed is the hydraulic pump speed when it is 50% of the rated engine speed, and the pressure at the steering gear outlet is the system specified back pressure. 5.3.2 Test steps
Make the steering system under test stop at the left (right) dead point, adjust the steering wheel drive device, mechanically rotate the steering wheel shaft with the maximum operating torque measured in 5.2, measure the number of turns of the steering wheel per minute, and perform three times in each direction, and take the average value as the steering wheel creep amount. 5.4 Pressure loss testwwW.bzxz.Net
5.4.1 For the open center hydrostatic system, the speed of the hydraulic pump is the speed at the rated engine speed. 2
JB/T5183—2002
a) Make the steering system under test in the neutral position, and the steering wheel speed is 0, and measure the pressure difference between the steering gear P port → O port (this pressure difference is the pressure loss in the neutral position). (See Appendix A) Mechanically rotate the steering wheel shaft to make the steering system under test perform a 90% steering cycle, and the steering wheel speed is 60r/min. At the same time, adjust the loading valve 21 to make the pressure at the steering gear inlet the rated working pressure, and measure the pressure difference between P port → A port (P port - → B port) and B port → +O port (A port - → +O port) at this time (the sum of these two pressure differences is the pressure loss in steering). (See Appendix A) 5.4.2 For the closed-center hydrostatic steering system, the speed of the hydraulic pump is the speed at the rated speed of the engine, the pressure at the inlet of the steering gear is the rated working pressure, and the steering wheel speed is 60r/min. Under this working condition, the steering wheel shaft is mechanically rotated to make the tested steering system perform 90% steering large cycle operation. At the same time, the loading valve 21 is adjusted to gradually load the steering system until the steering operating torque reaches the maximum operating torque. At this time, the pressure difference between the steering gear P port → A port (P port → B port) and B port → O port (A port → O port) is measured (the sum of these two pressure differences is the pressure loss during steering). (See Appendix A) 5.5 Manual steering performance test
The hydraulic pump stops supplying oil, the steering wheel shaft is mechanically rotated to make its speed 10r/min, and the loading valve 21 is adjusted so that the maximum torque measured by the torque meter 26 is equal to the design value of the tractor steering resistance torque. Under this working condition, observe whether the steering is normal, measure the maximum torque of the steering wheel and convert it into the maximum steering force of the steering wheel. (See Appendix A)
5.6 High temperature internal leakage test
Except that the oil temperature is not lower than 90℃, the rest is the same as 5.3.5.7 Low temperature manual steering performance test
Except that the oil temperature is not higher than -20℃ and there is no requirement for the steering wheel speed, the rest is the same as 5.5.5.8 Endurance test
The hydraulic pump speed is the speed of the hydraulic pump when the engine rated speed is 50%, and the pressure at the steering gear outlet is the system specified back pressure. Adjust the loading valve 21 so that the maximum pressure at the steering gear inlet is the rated working pressure. Mechanically rotate the steering wheel shaft at a speed of 60r/min, turn left and right from the neutral position of the steering system, and perform a 90% steering large cycle after every 10 steering small cycles. The rotation in each direction is recorded once. After a cumulative rotation of 300,000 times, perform an internal leakage test according to 5.3 to check the performance degradation. JB/T5183—2002
DC motor: 2-
Tachometer: 3
—Tested steering gear: 9
AC motor; 15-
Appendix A
(Normative appendix)
Schematic diagram of hydraulic system of test equipment
Tested steering pump:
-Angular displacement meter; 10-
Steering trapezoid; 16-
Coarse filter:
Hydraulic motor: 11| |tt||Oil tank: 6
Solenoid reversing valve: 12-
Safety: 7-
Fine filter:
-Speed regulating valve: 13——
Quantitative oil pump:
Tested steering cylinder; 17-
Loading cylinder: 18-
-Check valve: 19-
Variable oil pump:
—Back pressure regulating valve: 23—Pressure gauge; 24—Loading shaft: 25-—Bracket; 26—Torque meter. 20-—Overflow valve: 21-Loading valve: 22-
Figure A.1 Schematic diagram of hydraulic system
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Appendix B
(Normative Appendix)
Typical test curves of hydrostatic steering system for tractors JB/T5183—2002
Steering wheel left《right》angle ()
Steering wheel-steering knuckle arm angle displacement curve
Steering wheel angle (“)
Medium value
Steering wheel operating torque characteristic curve
People's Republic of China
Mechanical industry standard
Hydrostatic steering system for wheeled tractors
JB/T5183—2002
Test method
Published by Machinery Industry Press Publishing and Distribution
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 100037
Format 890mm×1240mm1/16?0.75 printing sheet·14,000 words1st edition, 1st printing, April 2003
Price: 12.00 yuan
Book Number: 15111·7253
Website: http://www.cmpbook.comEditorial Office Tel: (010) 88379779
Direct Sales Center Tel: (010 88379693All copies without anti-counterfeiting label on the cover are pirated
Copyright reserved
Infringements will be investigated1 Schematic diagram of hydraulic system
[) (cow) pregnancy
Appendix B
(Normative Appendix)
Typical test curves of static hydraulic steering system for tractors JB/T5183—2002
Steering wheel left《right》angle ()
Steering wheel-steering knuckle arm angle displacement curve
Steering wheel angle (“)
Medium value
Steering wheel operating torque characteristic curve
People's Republic of China
Mechanical industry standard
Hydrostatic steering system for wheeled tractors
JB/T5183—2002
Test method
Published by Machinery Industry Press Publishing and Distribution
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 100037
Format 890mm×1240mm1/16?0.75 printing sheet·14,000 words1st edition, 1st printing, April 2003
Price: 12.00 yuan
Book Number: 15111·7253
Website: http://www.cmpbook.comEditorial Office Tel: (010) 88379779
Direct Sales Center Tel: (010 88379693All copies without anti-counterfeiting label on the cover are pirated
Copyright reserved
Infringements will be investigated1 Schematic diagram of hydraulic system
[) (cow) pregnancy
Appendix B
(Normative Appendix)
Typical test curves of static hydraulic steering system for tractors JB/T5183—2002
Steering wheel left《right》angle ()
Steering wheel-steering knuckle arm angle displacement curve
Steering wheel angle (“)
Medium value
Steering wheel operating torque characteristic curve
People's Republic of China
Mechanical industry standard
Hydrostatic steering system for wheeled tractors
JB/T5183—2002
Test method
Published by Machinery Industry Press Publishing and Distribution
No. 22 Baiwanzhuang Street, Beijing
Postal Code: 100037
Format 890mm×1240mm1/16?0.75 printing sheet·14,000 words1st edition, 1st printing, April 2003
Price: 12.00 yuan
Book Number: 15111·7253
Website: http://www.cmpbook.comEditorial Office Tel: (010) 88379779
Direct Sales Center Tel: (010 88379693All copies without anti-counterfeiting label on the cover are pirated
Copyright reserved
Infringements will be investigated
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