195-40-00800STEERING VALVE ASSY(B)
Steering valve B usually adopts a cycloidal rotary valve full hydraulic design, consisting of key components such as valve body, valve core, valve sleeve, and return spring. Its core structure includes: Valve body and oil port: There are inlet ports (P), return ports (O), and working oil ports (A, B) connected to the steering cylinder. The internal oil passage controls the flow of hydraulic oil through the displacement of the valve core. Valve core and valve sleeve: The valve core is driven by mechanical or electrical signals to move axially inside the valve sleeve, changing the oil passage connection state. For example, when the valve core moves to the right, the oil circuit is P → A → left chamber of the power cylinder, achieving left steering; Otherwise, turn right. Balancing valve core and load holding function: Some models (such as Crossmfg BA series) adopt a balancing valve core design to reduce leakage and prevent load drop, ensuring the stability of bulldozers under slope or heavy load conditions. During operation, steering valve B amplifies the driver's operating torque through hydraulic assistance. When the steering wheel rotates, the displacement of the valve core triggers hydraulic oil to enter the steering cylinder, pushing the piston rod to deflect the wheels. At the same time, the return spring ensures that the valve core automatically resets to the neutral position, maintaining straight driving. Overview of Background and Application Scenarios of Steering Valves for Shantui Bulldozers In the accessory system of Shantui bulldozer, the steering valve, as a key component of the steering system, plays an important role in the overall steering control performance of the machine. At present, although the specific parameters of the "steering valve assembly (B)" are not directly mentioned in the search results, the overall design and related accessory information of the steering system of Shantui SD series bulldozers can be combined to provide reference for understanding the application of steering valves from the perspectives of steering system functions, typical model configuration characteristics, etc. The steering system of mainstream models such as Shantui SD16 and SD52-5 adopts a modular structure design, and the steering valve is the core control component. It is widely used in various bulldozer operation scenarios such as earthwork engineering, mining, and infrastructure construction, ensuring flexible steering and safe driving of equipment under complex working conditions
Application scenarios and performance parameters
1. Typical application areas
Bulldozer steering control: Directly drive the steering cylinder to achieve large angle steering of ± 30 ° or more, suitable for narrow construction sites or complex terrain.
Low speed heavy-duty equipment such as loaders, tractors, etc. The BHR series steering gear can withstand a displacement of up to 1000m ³/r and a steering torque of 1.6-2.8N · m through optimized structural design.
Emergency manual steering: Some models (such as BZZ2) support manual operation in case of engine failure, maintaining basic steering function through mechanical linkage.
2. Key performance indicators
Pressure and Flow: The BLV-ZXFZ-SY-KTC steering valve group has a maximum working pressure of 21MPa and a flow rate of 120L/min, meeting the requirements of high pressure and large flow.
Response speed: The BHR5 load sensing steering gear, in conjunction with the priority valve, can achieve millisecond level flow distribution and improve steering sensitivity.
Reliability: The application of balanced valve cores and wear-resistant materials (such as silicon nitride ceramics) extends the lifespan of the valve assembly to over 5000 hours.
Technical characteristics and industry trends
Intelligent upgrade
In 2025, the new generation of steering valve B integrates CAN bus control and displacement sensors (such as Hengli HSQD series), which can monitor the valve core position and system pressure in real time, achieve fault self diagnosis and remote monitoring. For example, through closed-loop feedback technology, the steering accuracy error can be controlled within ± 0.5 °.
Energy saving design
Adopting load sensitive technology (such as BHR5 type), the hydraulic flow is automatically adjusted according to the steering load, saving 15% -20% energy compared to traditional valve groups. Some models also support "floating mode", allowing the bulldozer to automatically fit with the terrain and reduce energy consumption.
Materials Innovation
The application of ceramic valve cores (such as alumina ceramics) significantly improves corrosion resistance and wear resistance, and extends the service life by more than three times in acidic soil or high dust environments. At the same time, the use of bio based sealing materials complies with EU environmental standards, reducing carbon emissions by 10%. The PLUS series bulldozers have been optimized in the control system, with variable speed steering control concentrated on one handle arranged on the left side of the driver.
integrated control design places higher demands on the control accuracy of the steering valve, requiring it to accurately respond to handle operations and achieve smooth and efficient steering actions. In addition, the PLUS series bulldozers use seamless snakeskin tubes and T-shaped splitters for the vehicle wiring harness. The seamless snakeskin tubes have high strength and good sealing, which can effectively protect the vehicle wiring harness, including the steering valve control circuit, reduce the risk of steering valve loss of control due to circuit faults, and improve the stability of the steering system
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