This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of cycloidal rotary valve full hydraulic power steering gear for tire loaders. This standard applies to cycloidal rotary valve full hydraulic steering gear for tire loaders (hereinafter referred to as steering gear). Other tire-type engineering machinery can refer to it. JB/T 7152.1-1993 Technical conditions for full hydraulic power steering gear for tire loaders JB/T7152.1-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 7152.1-93
Tire Loader
Technical Conditions for Full Hydraulic Power Steering Gear
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on March 1, 1994
Mechanical Industry Standard of the People's Republic of China
Tire Loader
Technical Conditions for Full Hydraulic Power Steering Gear
1 Subject Content and Scope of Application
JB/T 7152.1-93
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of cycloidal rotary full hydraulic power steering gear for tire loaders.
This standard applies to cycloidal rotary full hydraulic steering gear for tire loaders (hereinafter referred to as steering gear). Other tire-type engineering machinery may refer to it for adoption.
Cited standards
GB2828
GB/T13306
JB5120
JB/T5946
JB/T5947
JB/T7158
ZBT65002
3 Technical requirements
3.1 General requirements
Remote batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) Label
Cycloidal rotary valve type full hydraulic steering gear
General technical conditions for painting of construction machinery
General technical conditions for packaging of construction machinery
Method for determining the cleanliness of construction machinery parts Test method for cycloidal wide closed center hydrostatic steering gear 3.1.1 Steering gear shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures. 3.1.2 Parts should be inspected and qualified before they can be assembled or put into storage; outsourced parts and purchased parts should have inspection certificates and be inspected and qualified by the quality inspection department before they can be put into storage or assembled. 3.1.3 The joints of the external oil ports of the steering gear should be rust-proof, dust-proof and anti-corrosion, and the painted surface should comply with the provisions of JB/T5946.
3.2 Open-center steering gear
3.2.1 Basic parameters such as displacement, fluid volume and pressure are shown in Table 1. Table 1 Basic parameters of open-center steering gear
Nominal displacement
Nominal flow
Approved by the Ministry of Machinery Industry on November 21, 1993
Maximum inlet pressure
Rated working pressure
Maximum hourly back pressure
Continuous back pressure
Implemented on March 1, 1994
Nominal displacement
Nominal flow
JB/T7152.1-93
Continued Table 1
Maximum inlet pressure
Performance requirements and performance indicators are shown in Tables 2 and 3. Rated working pressure
Table 2 Performance requirements of open-heart steering gear
Nominal displacement
Air tightness
Sealing performance
Low working performance
High temperature working performance
Durability
External seepage, noise, vibration and temperature rise performance
Cleanliness
Pressure loss
The steering gear shall not have air leakage
No external leakage
Manual steering can be achieved
Maximum time pressure
No external leakage, normal rotation, no abnormality or phenomenon
Continuous back pressure
Reciprocating rotation for 200,000 times (including 1,000 manual rotations), after the test is completed, requirements a. Volumetric efficiency: the decrease of the specified value of the performance index shall not exceed 5%: b. Pressure swing: the increase of the specified value of the performance standard shall not exceed Greater than 0.5MPa, reliable steering, flexible return, the steering wheel returns to the center position within 35 after releasing the torque: d, the spring piece, the pin and the linkage shaft shall not be broken, there shall be no external leakage, noise, vibration, and temperature rise. There shall be no abnormal phenomenon. Maintain the pressure for 5 minutes under the rated pressure. There shall be no abnormal phenomenon such as source involvement and damage. The internal cleanliness of the steering gear shall not be greater than 125mg. Performance indicators of open-center steering gear
Power steering torque
Mechanical resistance torque
Manpower steering
mL/min
Description change rate
Nominal displacement
Pressure loss
P→+A
Note·P pressure oil port,
Closed-center steering gear
JB/T7152.1—93
Continued Table 3
Power steering torque range
T Withdrawal port| |tt||Mechanical resistance torque
Working oil port,
3.3.1 Basic parameters such as displacement, flow, pressure and speed are shown in Table 4. Manual steering
Not human
Power steering
Table 4 Basic parameters of closed-center steering gear
Nominal displacement
Nominal speed
Performance requirements and performance indicators are shown in Tables 5 and 6. Fixed pressure MPa
|12.5 or 16
Table 5 Performance requirements for closed-center steering gear
Air tightness
Steering function
Low humidity performance
High temperature performance
Durability
Observation test
Reading pressure
Clearness
Steering gear must not have back bubbles
mL/min
≤150||tt ||Nominal flow rate L/min
Flow rate change
When steering manually, the steering gear should steer reliably, position flexibly, without abnormal sound and sticking. After releasing the torque, the steering wheel should return to the middle position within 2:. When the steering gear is turned by the machine, it should steer reliably, position flexibly, without abnormal sound and sticking. The power steering torque meets the specified value. The pressure at port A (or port B) of the steering gear should meet the requirements. The steering gear should steer reliably without external leakage. The flow rate change rate should meet the specified value. After 300,000 times of endurance test, there should be no parts damage, the flow rate change rate should meet the specified value, no external leakage, and no abnormal noise, vibration and vibration. Maintain the pressure for 5 minutes at the rated pressure of 2, and there should be no leakage, damage and other abnormalities. The internal cleanliness of the steering gear should not be greater than 125mg3
4.Test method
Power steering torque
JB/T 7152. 193
Performance index of closed center steering gear
mL/min
4.1 Cleanliness determination method shall be in accordance with the provisions of JB/T7158. Pressure
4.2 The test method of open center steering gear shall be in accordance with the provisions of Chapter 6 and Chapter 8 of JB5120. 4.3 The test method of closed center steering gear shall be in accordance with the provisions of ZBT65002. 5 Inspection rules
5.1 Factory inspection
Manual steering
Low temperature
A port (
B port pressure
High degeneration
Energy flow
Rate of change
Factory inspection items are divided into full inspection and sampling inspection (see Table 7). Sampling inspection is carried out in accordance with GB2828. The qualified quality level (AQL) of the steering gear sampling inspection is 2.5, and the inspection level is the general inspection level. A single sampling plan is used. The sample size code is determined by the manufacturer according to the production batch according to Table 2 of GB2828 or by negotiation between the supply and demand parties. The user reviews the product quality, and the sampling plan can be negotiated and determined by the supply and demand parties. Table? Factory inspection items
Inspection items
Air quality
Internal leakage
Rough torque
Open steering gear
Cleanliness
Mechanical resistance torque
Power steering performance| |tt||Sealing
Pressure loss
External leakage, sound, alarm, rise
Road feel (and heart-responsive type)
5.2 Type inspection
Factory inspection
Sampling inspection
Full inspection
5.2.1 The converter shall be subject to type inspection in any of the following circumstances: a.
New trial products, modified products and transferred products: Old products that have been significantly improved shall be subject to type inspection before they are put into use. Before mass production: Inspection items
Air tightness
Mid-position leakage
End torque
Cleanliness
Mechanical resistance torque
Steering function
Pressure alarm
Pressure loss
Observation test
Factory inspection
Sampling inspection
Full inspection
Periodic and regular inspection of products.
JB/T 7152.193
5.2.2 See Table 8 for type inspection items.Inspection samples are taken from trial samples and batch products. The sampling batch should not be less than 20 units, and the number of samples should not be less than 3 units. One unit will be subject to full inspection, and the rest will not be subject to durability inspection. The type inspection is qualified only after all items are inspected and qualified.
Table 8 Type inspection items
Open-heart steering gear
Air tightness
Mechanical torque avoidance
Power steering performance
Sealing
End torque
Pressure loss
Internal leakage slip
Flow rate of change
Manual steering volumetric efficiency
Low temperature performance
High benefit performance
Durability
External leakage, noise, vibration and overflow
Cleanliness
Road feel (responsive type)
6 Marking, packaging and storage Storage
Closed-center steering gear
Air tightness
Mechanical resistance torque
Steering function
Pressure vibration
End torque
Mid-position leakage
Pressure loss
Static pressure gain
Manpower steering volumetric efficiency
Low-temperature performance
High-temperature performance
Durability
Observation test
Pan Jiedu
The steering gear sign should comply with the provisions of GB/T13306. The sign should be clearly written and fixedly installed in a conspicuous position of the steering gear. The sign should at least indicate the following:
Steering gear name and model:
Main parameters of steering gear:
Manufacturer name:bZxz.net
Manufacturing date (or number).
The packaging of the steering gear shall comply with the provisions of JB/T5947. The packaging type and protection method shall be determined by negotiation between the supplier and the supplier according to the storage and transportation conditions. The packaging shall have a packing list and a product certificate, which shall include the following contents: a.
Manufacturer name (or trademark) and address:
Steering gear name and specification code:
Signature and seal of the quality inspection department of the manufacturer;
Manufacture date (or production batch number).
6.3 The delivery mark on the outer package shall indicate the following contents: a
Name, specification and quantity of the steering gear:
Batch number and box number (or contract number);
Box size (length×width×height);
Net weight and gross weight:
Packing date:
Arrival station (port) and consignee:
Departure station (port) and consignor:
JB/T7152.1-93
Marked with words and signs such as "Handle with care" and "Avoid moisture". h.
The steering gear shall be stored in a ventilated and dry environment. The manufacturer shall ensure that the product will not be rusted, damaged or lose parts due to improper packaging within 12 months from the date of delivery under the conditions that meet the product storage and transportation requirements. Additional Notes:
This standard was proposed and managed by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Tianjin Engineering Machinery Research Institute. The main drafters of this standard were Wu Runcai and Yang Yaoxi.
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