JB/T 9839-1999 Technical requirements for cycloid rotary valve closed center hydrostatic steering gear
Some standard content:
ICS 65.060.10
Machinery Industry Standard of the People's Republic of China
JB/T9839-1999
Technical specificatians for orbit hydrostatic steering gear with closed-center 1999-08-06 release
National Machinery Industry Bureau
2000-01-01 implementation
JB/T9839-1999
After the non-standard, the July T6500-90 (Swing bag rotary net type closed center static liquid rear rotary device technical conditions) and ZBT65002-90 auxiliary line rotary type closed center static liquid steering device test force method merger and revision: Compared with ZT65001-90 and 2BT65002-90, this standard has some changes in the following main technical contents 1: Supplementary study of the leakage detection method ,
-- The steering gear structure size is cancelled
This standard replaces ZBT65001-90 and FT65002-90 from the date of implementation. Category A of this standard is indicative,
This standard is proposed and approved by the National Technical Committee for Standardization of Traction Standards. The issuing unit of this standard: Luoyang Tractor Research Institute. The main authors of this standard: Li Qinfeng, Nian Yanqing, Yan Gua. Scope
Machinery Industry Standard of the People's Republic of China
Technical conditions for arbic hydrostatic steering gear with elused- eeuter This standard specifies the type, symbol, specification, technical requirements, test method, inspection and marking, installation and storage of rotary valve type closed center non-return static hydraulic steering gear. This standard is applicable to rotary valve type closed center non-return static hydraulic steering gear (hereinafter referred to as steering gear) of agricultural and forestry tractors and self-propelled agricultural machinery and engineering machinery. The provisions of this standard that are divided into this standard are valid at the time of publication. All standards are subject to revision. All parties using this standard shall use the latest version of the following standards: GB/T2828-1987 Remote batch inspection counting and sample table (applicable to the inspection of continuous batches) 3 Type, symbol and specification
3.1 Type
The steering gear structure is closed and non-reactive, and its symbol is simplified as shown in Figure 1. Figure
Approved by the State Machinery Industry Bureau on August 6, 1999, January 1, 2000 3.2 Model designation method 3.3 Marking example JB/T9839—1999 Rated pressure C=12.5MPaL-16.0MPa Nominal displacement, mL/r Rotary valve type closed center non-reactive hydrostatic cycloid type closed center non-reactive static filter steering group, nominal displacement 100mLt, rated pressure 16MPa, marked as: BZZ100D 3. *Specifications
Steering gear specifications shall comply with the provisions of Table 1.
Model
BZZ,-80
BZZ,-100
BZZ,125
Bzz,-160
R77,200
Technical requirements
Nominal speed
4.1 Steering gear shall be manufactured according to drawings and technical documents approved by prescribed procedures. 4.2 Steering gear shall comply with the following provisions, and its test methods shall be carried out in accordance with the provisions of Chapter 5. 4.2.! Air tightness; Steering gear shall not have bubbles. 4.2.2 Mechanical resistance torque: The mechanical resistance torque of the steering gear shall comply with the provisions of Table 2. Table 2
BZZ,-B0
RZ2,160
BZ7,-125
BZZ,-1G0
BZZ,-200
Anti-torque
Power steering torque
Rated pressure
12.5 or 16
Pressure grip
End torque
JE/T 9839 1999
4.1.3 Steering performance: When turning manually, the steering gear should turn reliably and return flexibly without abnormal force and downward movement. The steering wheel should return to the middle position within 2:00 after releasing the force. When the steering gear is mechanically turned, the steering should turn reliably and return flexibly without stagnating or sticking. The power steering speed should meet the requirements of Table 2.
4.2.4 Pressure swing: The steering gear torque swing reduction shall comply with the provisions of Table 2. 4.2.5 Full-point steering: The steering gear end torque shall comply with the provisions of Table 2. 4.2.6 Intermediate position leakage: The intermediate position leakage of the steering gear shall comply with the provisions of Table 3. 4.2.7 Power loss: The power loss of the steering gear shall comply with the provisions of Table 3. 4.2. Static pressure difference: The static pressure difference between the two working ports A and B (hereinafter referred to as ports) of the steering gear shall comply with the provisions of Table 3. 4.2.9 Flow change adjustment: The flow rate change rate of the steering gear shall comply with the provisions of Table 3. Table
BZ-160
B77,-200
Intermediate position torque
mtumin
Positive force fire
4.2.10 Manual steering volumetric efficiency: The manual steering volumetric efficiency of the steering gear shall comply with the provisions of Table 4. Temperature performance: Steering gear 4 (or B) pressure should meet the requirements of Table 4. 4.2.11
Avoidance change
4.2.12 High-speed performance: Steering gear should be reliable and free from external movement. Flow rate should meet the requirements of Table 4. 4.2.13 Durability: All parts of the steering gear should not be damaged, and the flow rate should meet the requirements of Table 4. Table 4
BZ7,80
BZZ,-100
R72.,-125
BZZ,[60
BZZ,200
Artificial steering
Rate efficiency
Low energy
A(load B) force
4.7.14 Observation test: The steering gear shall not have any oil leakage, and there shall be no abnormal sound, vibration and temperature rise. High performance
Flow rate
4.3 The steering gear valve body is tested for resistance to currency, and can also be assembled and then tested. The test pressure is 2 times the rated pressure. There should be no leakage and damage for 5 minutes.
4.4 All parts of the steering gear must be inspected and qualified before assembly. Outsourced parts and purchased parts must have inspection certificates. 3
.1R/T9839—1999
4.5 Before assembly, the parts must be cleaned and the cleanliness of the steering gear internal must not be greater than 125mg. 4.6 Product appearance quality requirements
4.6.1 The joint surface between the body and the front cover, the body and the partition plate shall not be greater than 1.5mm. 4.6.2 The surface of the steering wheel should be smooth, without flash and burrs. 4.6.3 The signs should be clear, half-finished, correct and firmly fixed. 4.6.4 All external ports of the steering gear should be sealed with plastic plugs. 4.65 The exposed surface of the valve core should be greased, and other external surfaces should be coated with oil. The coating thickness and color should be uniform, the appearance should be smooth and even, and there should be no small defects such as marks.
≤Test method
5.1 Test conditions
5.1.1 Test fluid
5.1.1.1 The kinematic viscosity of the test fluid at the temperature of G5 is 25-35mm/s (special requirements). The engine fluid card should be used instead, and the transmission dual-purpose oil is 1 million.
5.1.1.2 The test oil temperature is 65+2T for type inspection and 65:+45 for output oil, except where otherwise specified.1.1.3 The filter and lubricating fluid shall not be lower than 20±m5.1.2 Test settings and equipment
5.1.2.1 The precision connection shall comply with the requirements of requirement 5. The test instruments shall be calibrated by the relevant departments and used within the specified period. Table s
Hazard category
By name
Pressure gauge
Flow meter
Tachometer
Short gauge
Type test supervision
5.1.2.2 Test equipment Concentration system Original reference number Appendix A (Appendix for reference) 5.1.3 Measurement point position
Factory test chamber
± 1 0%
5.1.3.1 The pressure measurement point should be set at (2-4)d (4 is the pipe diameter) away from the tested steering gear oil. During steady-state test, it is allowed to move the measurement point farther from the tested steering gear, but the actual loss of the channel should be taken into consideration. 5.1.3.2 The temperature measurement point should be set at (2-4)4 away from the pressure measurement point. 5.1.4 Stable conditions for parameter measurement
During the test, each parameter of each set point is measured. The measured parameter is stable under each test state. , the deviation from the control value is in accordance with the provisions of the table.
52 Ten calculation formulas
5.2.1 Flow change rate
Flow change rate formula (1 calculation:
JB/T9839—1999
Micro-wall change rate = 21-α×100%
No-load flow, that is, the flow when the steering gear A (or B) pressure is no-load, that is, the flow when the steering gear A (or B port pressure is full negative pressure. Table 6
|Number of tested devices
Note: R-level accuracy is used for type test, C-level accuracy is used for small factory test. 5.2.2 Human-powered transfer volumetric efficiency
Human-powered transfer volumetric efficiency single core formula (2) calculation: Human-powered transfer volumetric efficiency
Wu Zhong:
No-load flow, that is, the flow difference of the transfer device (or day) at the no-load outlet
refers to the load flow and, that is, the flow when the transfer device A (or B) is the specified output, 5.2.3 Pressure loss calculation formula
Left Steering pressure difference = (P,-,) + (m-) wwW.bzxz.Net
Right turn positive pressure difference [) (
Wherein: Road
Steering pressure at P port, MPa;
Steering gear A, MPa;
-Steering gear R port pressure, MPa
Steering gear Q port pressure, MPa
5.2.4 Static pressure difference calculation formula
Static pressure difference = -
Wherein: Steering pressure at A port, MPa;
Steering gear R Pressure, MPa.
5.3 Air tightness test
Put the steering gear in water, fill the steering gear with compressed gas, the gas pressure should not be less than U.16MPu, keep it for more than 3min, observe whether there is gas in the water,
5.4 Mechanical resistance torque test
The four oil ports of the steering gear are not connected to the pipeline. When the speed is 30r/min±5r/mn, measure the mechanical resistance torque of the steering gear: 5.5 Steering function test
JH/T9839—1999
The hydraulic pump 1 supplies the oil to the nominal flow rate of the main core, and the pressure at the steering gear port P is set to adjust the throttle valve 10, so that the back pressure of the special steering group)[1 is 0.6 3MPa and 6.1MPa, adjust the throttle valve to make the steering gear at full load pressure, that is, gradually increase the pressure on A (or B) port until the power steering shows an obvious upward trend, use the steering wheel to turn left 5 times, measure the steering return, check whether the steering is reliable, the position is flexible, and there is no calculation and jamming; then, mechanically rotate the steering gear at a speed of /m, turn left, measure the power steering torque, check whether the steering is reliable, the return is flexible, and there is no abnormal sound and jamming. 5.6 Pressure test
The hydraulic oil pump supplies oil to the nominal value of the steering gear. The pressure at the P port of the steering gear is the rated pressure. The valve is adjusted 10 times to make the steering back pressure 0.63MFa. Adjust the flow 6, make the steering A (or B! port pressure is negative pressure, the machine turns the steering: the speed is 60rmin, the pressure vibration modulus of A and B1 is measured for left and right steering. 5.7 End torque test
Practice pressure 1 The supply tank is the nominal flow of soft return strength, the pressure of steering gear P11 is its rated pressure, the steering gear A and B1 are blocked, the machine plate rotates the steering gear, the speed does not exceed 5r/mn, and the left nominal steering is used to measure the end torque of the steering gear. 5.8 Intermediate position leakage test
Liquid stop recording! The oil supply plate is the nominal flow plate of the steering gear, the pressure of the steering gear P port is its rated force, the A and B ports are connected into a loop, and the leakage of the world port Imin is measured.
5.9 Pressure loss test
The supply tank volume of the hydraulic pump 1 is the nominal flow volume of the steering gear, and the positive force of the steering pedal P port is the rated pressure. Adjust the throttle valve 1 0, so that the back pressure of the steering gear at the 0-port is 0.63MPa, the machine rotates the steering gear, the speed is 60r/min, and the throttle is adjusted to 6, so that the steering gear is fully loaded. Measure the sum of the force losses between P→A (or B) and B (or A)-port (that is, the internal force of the steering gear). 5.10 Static difference test
The hydraulic pump 1 supplies oil and is the nominal flow of the steering gear, and the steering pressure is its rated value. Close the A and B ports of the steering gear, the steering gear is in the middle position, and measure the static pressure difference between the A and B ports. 5.11 Flow rate change rate test
Connect the hydraulic pump 1 to estimate the nominal flow of the steering gear, the P pressure of the steering gear is its rated pressure, adjust the throttle to 10, so that the back pressure of the steering gear at the 0-port is 0.63MPa, the machine rotates the steering gear, the speed is 60c/min, and adjust the throttle to 10. 6, make the steering gear full load force and no-load force (throttle valve 6 fully open) to turn left and right, and measure its flow rate change rate. S.12 Manual steering volumetric efficiency test
The hydraulic pump 1 stops supplying oil, and the light driver is rotated at a speed of 30rmn. Adjust the throttle valve 6 to make the steering gear A (or B) 1 manual steering no-load force and pressure, and measure its flow. Specified pressure is shown in Table 7, the nominal non-positive force of the steering gear
Specified H force
5.[3 Low temperature test
JB.T9839—1999
The temperature of the steering gear pool is not higher than ~20℃, the steering wheel is mechanically rotated, and the maximum operating force is not more than 600N. The steering remote is fully cut off, and the pressure of the steering gear A (or B) I is measured.
514 High temperature test|| tt||Hydraulic pressure 1 The oil supply plate is the nominal flow of the steering gear, the pressure of the steering gear port P is its rated pressure, adjust the throttle valve 10, and make the back pressure of the steering gear port O be 0.63MP. Adjust the throttle valve 6, and then the pressure of A (minus B) is the full load pressure, the steering gear and oil temperature are not less than 90, the oil viscosity is not less than 10mm/g, and the steering gear is rotated by the machine, the speed is 60f/aim, and the left and right directions are 30min each. Observe whether the steering can be frosted and whether there are any abnormalities and paint leakage, and measure the rate of change of the sludge. 5.15 Durability test
Filter pressure The oil supply plate is the nominal flow plate of the steering gear, the pressure of the steering gear port P is its rated pressure, adjust the throttle valve 10, the back pressure of the steering gear port is 0.6MP, turn the steering gear left and right, the speed is 60m, adjust the throttle period, and the A (day) port pressure is full load. A total of 30×10* turns (1 turn left or right, each counts as 1 change of steering. After the endurance test is completed, 5.1 Carry out flow rate change test
5, 16 observation test
During the whole process of the above tests, observe whether there are abnormal phenomena such as paint leakage, noise, vibration and temperature rise, 5. Cleanliness test
a) Pollutant collection part: steering gear inner cavity. b) Cleaning leakage: No. 120 solvent gasoline.
c) Testing equipment: 202 type medium-speed quantitative scale, balance with one ten-thousandth accuracy, warm dry box, 2 culture IIIs, one container,
Preparation before testing: Filter the No. 120 solvent gasoline with a filter membrane with an accuracy of 1.2 μm. All testing layers and the outside of the steering gear to be tested should be cleaned before testing. Put two pieces of paper in two culture dishes respectively, put them into the drying sieve in a half-covered state, dry them at 1059 for 0.5h, take them out, close the covers when taking them out, weigh them to a constant weight and record them, put them in a desiccator for future use. e) Detection operation process: disassemble the inspection transfer device, put it in a container and clean it with a white cloth, then pass the cleaning filter in the container through the spare double-layer paper, and use another 50ml of cleaning solution to rinse the filter paper to remove the dirt, put the upper and lower layers of filter paper in two culture containers respectively, half-cover them. Put them into a ten-centimeter tube and bake them at a humidity of 105°C for 2 hours. When taking them out, close the lid and weigh them to a constant weight and record it. From this mass, subtract the filter paper disc that was baked before baking, and the sum of the mass differences is the total mass of the pollutants. 6 Inspection schedule
6.1 Factory inspection
6.1.1 Factory inspection covers 4.1-4.2.6, 4.3-4.66.1.2 Each converter must be inspected and qualified by the inspection department before the certificate of conformity can be issued and allowed to leave the factory. 6.4 Type test
6.2.1 Type test shall be conducted in any of the following special conditions: a) Test and verification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and technology, which may affect the performance of the steering gear; at least once every three years during regular production; d) When the production of the steering gear is resumed after a long-term suspension; e) When there is a significant difference between the factory test results and the last type test. 6.2.2 The samples for type test must be taken from the batch of products (except for new products). The batch of samples should not be less than 20 sets. 6.2.3 The number of steering screens for type test shall not be less than 3 sets, of which 1 set shall be tested for the whole day, and the others shall not be subjected to durability test. Only after the test items are qualified can the type test be qualified.
6.2.4 After the type test is qualified, the competent department shall issue a document certifying the qualification. .3 The designated unit intends to conduct random inspection on the received products, and the test items can be selected at will. The sample size, quality level and inspection level of random inspection shall be in accordance with the provisions of G/T2828. The specific sampling plan and judgment rules can be agreed upon by the supply and demand parties. 7 Marking, packaging, storage technology. 1 Each steering gear should be equipped with product markings, which include: a) manufacturer's name or trademark; b) product name and code; c) manufacturing date and production batch number; d) nominal pressure and nominal displacement; c) validity period; 7.2 When packing out of the factory, each steering gear is accompanied by a product certificate and instruction manual. 7.3 The product logo should include the address of the manufacturer, the standards implemented by the enterprise, and the production license number. 7.4 When packing, the specified sealing ring and spring should be packed in the same box: 5. The initial packaging material should be moisture-proof, and the packaging should be reliable and reliable. 6. The packaging surface should be marked with: a) manufacturer name or trademark; b) product name and model; d) departure station, arrival station, consignee, address; d) steering gear plate, weight and gross weight; 3. "Handle with care" and "Handle with care" and other words and signs. 7. The finished products should be stored in a well-ventilated, dry and clean place, and should not be placed together with corrosive materials to ensure that the surface of the processing is not rusted.
7.8 Under the premise that the user complies with the product use and storage rules, if the product cannot be used normally due to manufacturing quality problems within 1.5 years from the date of delivery, the manufacturer shall be responsible for free repair or replacement. JBT9839-1999
(report time)
Principle of static test equipment filter pressure system
1-pressure variable flow: 2-certified converter, 3-torque sensor; 4-speed sensor; 5-one-way group: 6, 1 heart-section application; 7.9.11-electrical exchange room smoke, -submersible motor: 12-transmission flash: 13-flow shock: 14-quantitative increase diagram Al
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