JB/T 5120-2000 Cycloid rotary valve type full hydraulic steering gear
Some standard content:
ICS23.100.01
Machinery Industry Standard of the People's Republic of China
JB/T5120-2000
Cycloid rotary valve full-hydraulic
Hydrostatic steering control units2000-08-31Promulgated
State Machinery Industry Bureau
2000-12-01Implementation
JB/T51202000
Foreword
This standard is a revision of JB/T5120-91 "Cycloid rotary valve residual hydraulic steering gear". Compared with JB/T5120-91, this standard has some changes in the following major technical contents: the displacement is expanded from the original 80~800mL/ to 80~1000mL/r; the maximum population pressure is expanded from the original 12.5MPa to 12.5MPa and 16MPa; the sampling method and judgment rules for steering gear product inspection adopt GB/T2828: - The cleanliness assessment method for steering gear products adopts JB/T78581995. This standard replaces JB/T5120-91 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Hydraulic and Pneumatic Standardization Technical Committee. The drafting units of this standard: China Agricultural Mechanization Science Research Institute, Zhenjiang Hydraulic Parts Factory, Beijing Hongke Hydraulic Parts Factory, Shandong Jining Li Ke Hydraulic Parts Factory, Heilongjiang Hydraulic Parts Factory, Beijing Zhongkeyuan Hydraulic Parts Factory, Siping Combine Harvester Factory. The main drafters of this standard are Yang Linxing, Yan Xinyuan, Shen Geguang, Wang Yanzhu, Li Guizhen, Zhao Xinhua and Yang Yugui. This standard was first issued in May 1991.
1 Scope
Mechanical Industry Standard of the People's Republic of China
Cyeloid rotary valve full-
Hydrostatic steering control unitsJB/T51202000
Replaces JB/T 5120-91
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking and packaging of cycloid rotary valve full-hydraulic steering control units (open-heart type) (hereinafter referred to as steering control units). This standard is applicable to steering control units with hydraulic oil or other mineral oils of equivalent performance as working medium. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2346—1988
GB/T 2347—1980
GB/T2828—1987
GB/T 2878-1993
GB/T 79351987
GB/T14039—1993
JB/T 78581995
3 Definitions, symbols and units
3.1 Definitions
Hydraulic and pneumatic systems and components Nominal pressure series Nominal displacement series of hydraulic pumps and motors
Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) Types and sizes of threaded connection ports of hydraulic components General technical conditions for hydraulic components
Hydraulic system working medium solid particle contamination level code Hydraulic component cleanliness assessment method and hydraulic component cleanliness index This standard adopts the following definitions.
3.1.1 Maximum inlet pressure
The maximum input pressure when the steering gear is continuously operated within the specified speed range and is guaranteed not to be damaged. Rated working pressure
The maximum input pressure when the steering gear is continuously operated within the specified speed range and is guaranteed to have actual service life. 3.1.33
No-load pressure
The input pressure of the steering gear shall not exceed 10% of the maximum working pressure: Maximum instantaneous back pressure
The maximum back pressure when the steering gear is continuously and normally operated within the rated working pressure and the specified speed range for a short period of time. 3.1.5 Power loss
The difference between the input pressure and the output pressure of the steering gear. 3.1.6 Displacement
Approved by the State Machinery Industry Bureau on August 31, 2000 and implemented on December 1, 2000
The volume of liquid output per rotation of the steering gear shaft. No-load displacement
The actual output displacement measured under no-load pressure. Effective displacement
JB/T5120-2000
The actual output displacement measured at the set pressure. 3. 1.9
Power steering torque
The torque applied to the steering gear shaft when the steering gear is in the bed force oil supply condition. 3.1.10Manpower steering
When the steering gear is in the non-pressure oil supply condition, steering is achieved by manpower. 3.1.11
End torque
The torque applied to the steering gear shaft when the oil ports (A and B ports) of the steering gear leading to the actuator are closed. 3.1.12
Mechanical resistance torque
The torque applied to the steering gear shaft when the four oil ports (P, A, B, T) of the steering gear are fully opened in the T condition. 3.1.13
Pressure swing
When the steering gear rotates under the conditions of pressure supply (P port) and specified back pressure (T port), the pressure swing value of the T oil port (A or B port).
3.2 Quantity, symbol and unit
The symbols and units used in this standard are shown in Table 1. Table! Quantity, symbol and unit
Name of reference
Number of plates
Kinematic viscosity
Volume efficiency
4.1 Classification
The structural type of steering gear is divided into open-circuit non-responsive and open-circuit responsive. The symbols are shown in Figure 1. Single
4.2 Model marking
Marking example:
a) Open-circuit non-responsive
JB/T5120—2000
Fig.! Steering gear symbol
Steering column shaft head connection type
b) Open-heart reaction
A-Cross connection (can be omitted): B-Spline connection Displacement, mL/
Maximum inlet pressure, MPa
D-12.5 (can be omitted); E-16
Structural code
1 Open-heart non-reaction: 2-Open-heart reaction
Cycloidal rotary valve type full hydraulic steering gear
Cycloidal rotary valve type full hydraulic steering gear, open-heart non-reaction, maximum inlet pressure 12.5MPa, displacement 80mL/r, cross connection: BZZ1-80
5 Basic parameters and connection dimensions
5.1 Basic parameters
The basic parameters of the steering gear shall comply with the requirements of Table 2. Table 2 Basic parameters of cycloid rotary valve full hydraulic steering gear Dream number
BZZ1-80
BZZ1-100
BZZ1-125
BZZ1-160
BZZ1-200
BZZ1-250
BZZ1-315
BZZ1-400
Nominal arrangement
Nominal flow
Liariu
Maximum population pressure
Amount Rated operating pressure
Maximum back pressure
Continuous back pressure
BZZ1-500
BZZ1-630
BZZ1-800
BZZ1-1000
BZZ2-80
BZZ2-100
BZZ2-125
BZ72-160
BZZ2-200
Nominal displacement
Nominal flow
5B/ 51202000
Table 2 (End)
Teaching adults how much force
12.5, 16
Rated working force
10, 12.5
10, 12.5
1 The nominal flow rate of the steering gear with displacement of 80-630mL/r refers to the flow rate when the steering wheel is at 1.25 times of 60r/min. 2 The nominal flow rate of the steering gear with displacement of 800.1000mL/r refers to the flow rate when the steering wheel is at 1.25 times of 50r/min. 5.2 Connection size
The recommended connection size of the steering gear is shown in Figure 2.
4XMDX15-60
XM1--60
Note: Old product D=20: New product D=22 Figure 2 Connection dimensions
Maximum instantaneous backlash
Continuous backlash
6 Technical requirements
6.1 General technical requirements
JBT51202000
6.1.1 The nominal pressure series shall comply with the provisions of GB/T2346.6.1.2 The nominal displacement series shall comply with the provisions of GB/T2347. 6.1.3 The type and size of the threaded oil port shall comply with the provisions of GB/T2828. 6.1.4 Other technical requirements shall comply with the provisions of 1.2 to 1.4 in GB/T79351987. 6.2 Performance
6.2.1 Mechanical resistance torque
The mechanical resistance torque of the steering gear shall comply with the provisions of Table 3. Table 3 Steering gear performance indicators
BZZI-80
BZZ1-100
BZZ1-125
BZZ1--160
BZZ1-200
BZZ1-250
BZZ1-315
BZZ1-400
BZZ1-500
BZZ1-630
B221-800
BZZ1-1000
BZZ2-80||tt| |B7Z2-100
B7Z2-125
BZ22-160
BZZ2-200
6.2.2 Turning performance
Power loss
≤0.5≤t.8
≤0.11≤0.3
Power steering torque
Manpower steering
Internal surface
mL/min
≤125
≤150
The steering gear should be reliable in steering and flexible in returning to its original position, without abnormal sound or jamming. In case of manual steering, the steering wheel should return to the middle position within 35 after releasing the torque; in case of mechanical steering, the power steering torque should meet the requirements of Table 3. 5
6.2.3 Pressure swing
The pressure swing of the steering gear shall comply with the provisions of Table 3. 6.2.4 End torque
The end torque of the steering gear shall comply with the provisions of Table 3. 6.2.5 Internal leakage
JB/T5120-2000
The internal leakage plate of the steering gear in the middle position shall comply with the provisions of Table 3. 6.2.6 Pressure loss
The pressure loss of the P-→T port and P→A (B) port of the steering gear and the difference in pressure loss between the P→A port and the P→B port shall comply with the provisions of Table 3. 6.2.7 Flow rate change
The flow rate change rate of the steering gear shall comply with the provisions of Table 3. 6.2.8 Manual steering volumetric efficiency
The manual steering volumetric efficiency of the steering gear shall comply with the provisions of Table 3. 6.2.9 Starting pressure
The starting pressure of the steering gear shall comply with the provisions of Table 3. 6.2.10 Sealing
There shall be no external leakage at the joints of the steering gear. 6.2.11 Low temperature performance
When the temperature of the steering gear and the input oil is not higher than -20℃, manual steering should be achieved. 6.2.12 High temperature performance
When the temperature of the steering gear and the input oil is not lower than 90℃, the steering is reliable and there is no external leakage. 6.2.13 Durability
After the steering gear test, the following requirements are required: a) Volumetric efficiency: the decrease is not more than 5% compared with the specified value of the performance index; b) Pressure swing: the increase is not more than 0.5MPa compared with the specified value of the performance index; c) Steering is reliable and the return is flexible. The steering wheel returns to the middle position within 3s after the torque is released; d) The spring sheet, the pin and the linkage shaft shall not be deformed or broken. 6.2.14 Noise, vibration and temperature rise
When the steering gear is working normally, there shall be no abnormal noise, vibration and temperature rise. 6.3 Assembly quality
The technical requirements for component assembly shall comply with the provisions of 1.5-1.8 in GB/T7935-1987. 6.3.1 Air tightness inspection
When the inner cavity of the tested steering gear is filled with 0.16MPa clean gas, there shall be no gas leakage such as gastric bubbles. 6.3.2 Internal cleanliness
The internal cleanliness assessment method shall comply with the provisions of JB/T7858, and the cleanliness index shall comply with the provisions of Table 4. 6.4 Appearance requirements
The appearance requirements shall comply with the provisions of 1.9~1.10 in GB/T7935-1987. 6
Steering gear specifications
Cleanliness index
Test device and test conditions
7.1 Test device
JB/T5120—2000
Cleaning index of cycloid rotary valve type full-liquid steering gear Table 4:
Displacement mL/r
80-400
The system principle of the test shall comply with the provisions of Appendix A (Appendix of the standard). 7.2 Position of measuring points
5001000
7.2.1The pressure measuring point shall be set at (2~4)d (d is the pipe diameter) from the input and output ports of the tested steering gear. During the steady-state test, it is allowed to move the measuring point farther from the tested steering gear, but the actual pressure loss of the pipeline shall be considered. 7.2.2The temperature measuring point shall be set at (2~4)d upstream of the pressure measuring point. 7.3 Test oil
7.3.1 Viscosity: Kinematic viscosity is 42~74mm/s. 7.3.2 Oil temperature: Unless otherwise specified, type tests shall be conducted at (50±2)℃, and factory tests shall be conducted at (50±4)℃. 7.3.3 Cleanliness level: The solid particle contamination level code of the test oil shall not be higher than 19/16 specified in GB/T14039. 7.4 Steady-state condition
Steady-state condition refers to the case where the variation range of the average display value of each parameter meets the requirements of Table 5. Under steady-state condition, each parameter (pressure, flow plate, torque, speed, etc.) at each set point shall be measured simultaneously. Table 5 Variation range of average display value of parameter
Measurement parameter
Power (gauge pressure p<0.2MPa)
Pressure (gauge pressure p≥0.2MPa)
Measurement accuracy level
Note: Type test shall not be lower than Class B measurement accuracy: Factory test shall not be lower than Class C measurement accuracy, 7.5 Measurement accuracy
Measurement accuracy is divided into three levels: A, B, and C. The allowable system error of the measurement system is specified in Table 6. c9 Starting pressure
The starting pressure of the steering gear shall comply with the provisions of Table 3. 6.2.10 Sealing
There shall be no external leakage at the joints of the steering gear. 6.2.11 Low temperature performance
When the temperature of the steering gear and the input oil is not higher than -20℃, manual steering shall be achieved. 6.2.12 High temperature performance
When the temperature of the steering gear and the input oil is not lower than 90℃, the steering shall be reliable and there shall be no external leakage. 6.2.13 Durability
After the steering gear test, the following requirements shall be met: a) Volumetric efficiency: the decrease shall not exceed 5% compared with the specified value of the performance index; b) Pressure swing: the increase shall not exceed 0.5MPa compared with the specified value of the performance index; c) Steering is reliable and the return is flexible. The steering wheel returns to the middle position within 3s after the torque is released; d) The spring sheet, the pin and the linkage shaft shall not be deformed or broken. 6.2.14 Noise, vibration and temperature rise
When the steering gear is working normally, there shall be no abnormal noise, vibration and temperature rise. 6.3 Assembly quality
The technical requirements for component assembly shall comply with the provisions of 1.5-1.8 in GB/T7935-1987. 6.3.1 Air tightness inspection
When the inner cavity of the tested steering gear is filled with 0.16MPa clean gas, there shall be no gastric bubbles or other air leakage. 6.3.2 Internal cleanliness
The internal cleanliness assessment method shall comply with the provisions of JB/T7858, and the cleanliness index shall comply with the provisions of Table 4. 6.4 Appearance requirements
The appearance requirements shall comply with the provisions of 1.9~1.10 in GB/T7935-1987. 6
Steering gear specifications
Cleanliness index
Test device and test conditions
7.1 Test device
JB/T5120—2000
Cleaning index of cycloid rotary valve type full-liquid steering gear Table 4:
Displacement mL/r
80-400
The system principle of the test shall comply with the provisions of Appendix A (Appendix of the standard). 7.2 Position of measuring points
5001000
7.2.1The pressure measuring point shall be set at (2~4)d (d is the pipe diameter) from the input and output ports of the tested steering gear. During the steady-state test, it is allowed to move the measuring point farther from the tested steering gear, but the actual pressure loss of the pipeline shall be considered. 7.2.2The temperature measuring point shall be set at (2~4)d upstream of the pressure measuring point. 7.3 Test oil
7.3.1 Viscosity: Kinematic viscosity is 42~74mm/s. 7.3.2 Oil temperature: Unless otherwise specified, type tests shall be conducted at (50±2)℃, and factory tests shall be conducted at (50±4)℃. 7.3.3 Cleanliness level: The solid particle contamination level code of the test oil shall not be higher than 19/16 specified in GB/T14039. 7.4 Steady-state condition
Steady-state condition refers to the case where the variation range of the average display value of each parameter meets the requirements of Table 5. Under steady-state condition, each parameter (pressure, flow plate, torque, speed, etc.) at each set point shall be measured simultaneously. Table 5 Variation range of average display value of parameter
Measurement parameter
Power (gauge pressure p<0.2MPa)
Pressure (gauge pressure p≥0.2MPa)
Measurement accuracy level
Note: Type test shall not be lower than Class B measurement accuracy: Factory test shall not be lower than Class C measurement accuracy, 7.5 Measurement accuracy
Measurement accuracy is divided into three levels: A, B, and C. The allowable system error of the measurement system is specified in Table 6. c9 Starting pressure
The starting pressure of the steering gear shall comply with the provisions of Table 3. 6.2.10 Sealing
There shall be no external leakage at the joints of the steering gear. 6.2.11 Low temperature performance
When the temperature of the steering gear and the input oil is not higher than -20℃, manual steering shall be achieved. 6.2.12 High temperature performance
When the temperature of the steering gear and the input oil is not lower than 90℃, the steering shall be reliable and there shall be no external leakage. 6.2.13 Durability
After the steering gear test, the following requirements shall be met: a) Volumetric efficiency: the decrease shall not exceed 5% compared with the specified value of the performance index; b) Pressure swing: the increase shall not exceed 0.5MPa compared with the specified value of the performance index; c) Steering is reliable and the return is flexible. The steering wheel returns to the middle position within 3s after the torque is released; d) The spring sheet, the pin and the linkage shaft shall not be deformed or broken. 6.2.14 Noise, vibration and temperature risewww.bzxz.net
When the steering gear is working normally, there shall be no abnormal noise, vibration and temperature rise. 6.3 Assembly quality
The technical requirements for component assembly shall comply with the provisions of 1.5-1.8 in GB/T7935-1987. 6.3.1 Air tightness inspection
When the inner cavity of the tested steering gear is filled with 0.16MPa clean gas, there shall be no gastric bubbles or other air leakage. 6.3.2 Internal cleanliness
The internal cleanliness assessment method shall comply with the provisions of JB/T7858, and the cleanliness index shall comply with the provisions of Table 4. 6.4 Appearance requirements
The appearance requirements shall comply with the provisions of 1.9~1.10 in GB/T7935-1987. 6
Steering gear specifications
Cleanliness index
Test device and test conditions
7.1 Test device
JB/T5120—2000
Cleaning index of cycloid rotary valve type full-liquid steering gear Table 4:
Displacement mL/r
80-400
The system principle of the test shall comply with the provisions of Appendix A (Appendix of the standard). 7.2 Position of measuring points
5001000
7.2.1The pressure measuring point shall be set at (2~4)d (d is the pipe diameter) from the input and output ports of the tested steering gear. During the steady-state test, it is allowed to move the measuring point farther from the tested steering gear, but the actual pressure loss of the pipeline shall be considered. 7.2.2The temperature measuring point shall be set at (2~4)d upstream of the pressure measuring point. 7.3 Test oil
7.3.1 Viscosity: Kinematic viscosity is 42~74mm/s. 7.3.2 Oil temperature: Unless otherwise specified, type tests shall be conducted at (50±2)℃, and factory tests shall be conducted at (50±4)℃. 7.3.3 Cleanliness level: The solid particle contamination level code of the test oil shall not be higher than 19/16 specified in GB/T14039. 7.4 Steady-state condition
Steady-state condition refers to the case where the variation range of the average display value of each parameter meets the requirements of Table 5. Under steady-state condition, each parameter (pressure, flow plate, torque, speed, etc.) at each set point shall be measured simultaneously. Table 5 Variation range of average display value of parameter
Measurement parameter
Power (gauge pressure p<0.2MPa)
Pressure (gauge pressure p≥0.2MPa)
Measurement accuracy level
Note: Type test shall not be lower than Class B measurement accuracy: Factory test shall not be lower than Class C measurement accuracy, 7.5 Measurement accuracy
Measurement accuracy is divided into three levels: A, B, and C. The allowable system error of the measurement system is specified in Table 6. c
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