Auto Power Steering Pump Guide
Car power steering pump and steering rack together to form a car power steering system to drive the car steering wheel to achieve the car steering function.
The role of the car power steering pump is to provide the required power source for the steering system, and the internal security valve has a role in safe protection for the steering system.
A good steering system should have timely response and accurate road feel.
Classification
1. According to the type of vehicle, it can be divided into: Commercial vehicle power steering pump and passenger vehicle power steering pump.
2. According to the structural form, it can be divided into: Vane type power steering pump, gear type power steering pump, plunger type power steering pump; among them, the vane type power steering pump is widely used in various models due to its small size, low noise, high volumetric efficiency and other advantages.
3. According to the driving form, it can be divided into: Gear-driven power steering pump, pulley-driven power steering pump, spline-driven power steering pump; among them, the pulley-driven power steering pump is mainly used to drive passenger cars with small torque, and the gear-driven and cross-sliding key types are more common in commercial vehicles.
Working Principle
The working principle of Power Steering Pump is based on the transmission of hydraulic force, which is mainly divided into two stages: oil suction stroke and oil pressure stroke.
The working principle of Power Steering Pump is to realize the steering function of the vehicle through the transmission of hydraulic force. In the oil suction stroke, the hydraulic oil is pumped into the chamber of the pump body; in the oil pressure stroke, the hydraulic oil is compressed and guided to the steering device through the distribution plate, pushing the steering mechanism to rotate and realize the steering of the vehicle.
- Oil suction stroke: When the engine is running, the gear drives the rotor to rotate. Under the action of the rotor, the hydraulic oil enters the spiral chamber of the pump body from the oil inlet. At the same time, the distribution plate will guide the hydraulic oil from the chamber to the oil outlet as it rotates. In this process, the chamber between the pump body and the distribution plate will gradually enlarge, so that the hydraulic oil generates suction and is pumped into the chamber. When the distribution plate is turned to a certain position, the hydraulic oil will enter the oil pressure stroke.
- Oil pressure stroke: After the hydraulic oil is sucked into the chamber, when the distribution plate continues to rotate, the hydraulic oil is compressed and guided to the steering device through the groove on the distribution plate. The piston in the steering device will be affected by the pressure of the hydraulic oil, generating thrust, thereby driving the steering mechanism to rotate and realize the steering of the vehicle.
Power Steering Pump With Gear
Power Steering Pump With Gear is an important component in the hydraulic steering system of automobiles. It achieves the suction, compression and pushing of liquid through the rotation and mutual meshing of gears, thereby providing the necessary hydraulic power for the steering system of the vehicle.
Basic Structure
Driving gear: connected to the engine through a belt, chain or direct connection to receive the power of the engine.
Driven gear: meshes with the driving gear to form the working chamber of the gear pump.
Pump body: accommodates and supports the rotation of the gear, and forms a sealed hydraulic working chamber.
Oil seal and seal: ensure that the hydraulic oil inside the pump body does not leak to the outside.
Inlet and outlet ports: used for the suction and discharge of hydraulic oil respectively.
Working Principle
When the engine is running, power is transmitted to the driving gear through a belt, chain or direct connection. The driving gear starts to rotate and drives the driven gear meshing with it to rotate together. The rotation of the gears causes the volume of the working chamber inside the pump body to change periodically: when the two gears gradually mesh, the volume of the working chamber decreases, the oil pressure increases, and the hydraulic oil is discharged; when the two gears gradually separate, the volume of the working chamber increases, forming a negative pressure, and the hydraulic oil is sucked in. In this way, the hydraulic oil is continuously sucked in and discharged, forming a continuous hydraulic flow to provide power for the steering system.
Application Characteristics
- Efficient and stable: The gear pump has a simple structure, stable operation, and can provide a relatively stable hydraulic output.
- Strong self-priming ability: The gear pump has a certain self-priming ability and can achieve self-priming at a certain height, reducing the need for external auxiliary equipment.
- Strong anti-pollution ability: It can adapt to relatively harsh working environments, such as liquids containing impurities or particles.
- Strong load-bearing capacity: It can withstand a certain impact load. It is suitable for occasions that require frequent starting and stopping.
Power Steering Pump With Pulley
Power Steering Pump With Pulley is a Power Steering Pump that is connected to the engine crankshaft through a pulley and driven by the power of the engine. This pump is usually used in passenger cars with low driving torque and is an important part of the hydraulic power steering system.
Basic structure
Pulley: connected to the engine crankshaft to transmit the power of the engine.
Pump body: contains and supports the internal components of the pump to form a sealed working chamber.
Rotor and blades: The rotor rotates in the pump body, and the blades rotate with the rotor. The hydraulic oil is sucked in and discharged by the change of the gap between the blades and the pump body.
Oil distribution plate: located on both sides of the rotor to control the inlet and outlet of the hydraulic oil.
Combination valve: includes overflow valve and safety valve, which are used to limit the maximum output flow and pressure of the steering oil pump to protect the safety of the system.
Working Principle
When the engine is running, power is transmitted to the Power Steering Pump through the pulley. The rotor in the pump body begins to rotate, and the blades are close to the inner wall of the pump body under the action of centrifugal force. As the rotor rotates, the gap between the blades and the pump body changes, forming a working chamber. When the volume of the working chamber increases, negative pressure is generated and hydraulic oil is sucked in; when the volume of the working chamber decreases, the pressure increases and the hydraulic oil is discharged. In this way, the hydraulic oil is continuously sucked in and discharged, forming a continuous hydraulic flow to provide power for the steering system.
Application Features
- Small driving torque: Power Steering Pump With Pulley is usually used to drive passenger cars with small torque. Since the engine power of passenger cars is relatively small, the use of pulley drive can reduce the impact on the engine power output.
- Simple structure: The pulley drive method makes the structure of the pump body relatively simple, and installation and maintenance are also more convenient.
- Smooth transmission: Belt drive has buffering and shock absorption effects, which can make the pump body more stable during operation and reduce vibration and noise.
Power Steering Pump With Spline
Power Steering Pump With Spline is an important pump type in the automotive hydraulic power steering system. It is connected to the engine or other power source through Spline to achieve power transmission and conversion.
Basic structure
Spline connection: Power Steering Pump With Spline uses Spline connection to connect the input shaft of the pump to the engine or other power source to achieve power transmission.
Pump body: The pump body contains key components such as rotors and blades to form a sealed working chamber for the suction and discharge of hydraulic oil.
Control valve: The pump body may also be equipped with a control valve to adjust the flow and pressure of hydraulic oil to ensure the stable operation of the steering system.
Working Principle:
When the engine is running, power is transmitted to the input shaft of the Power Steering Pump through the Spline connection.
The input shaft drives the rotor in the pump body to rotate, and the blades on the rotor rotate accordingly, sucking and discharging hydraulic oil through the change in the gap between the blades and the pump body.
The hydraulic oil is continuously sucked in and discharged after pressurization, forming a continuous hydraulic flow to provide the necessary power for the steering system.
Application Features
- Stable transmission: The Spline connection device has high stability and reliability, which can ensure the continuity and accuracy of power transmission.
- Strong adaptability: This pump type is suitable for a variety of vehicle models and power sources. It can meet the needs of different vehicles for steering systems.
- High durability: Spline and other parts inside the pump body are usually made of wear-resistant and corrosion-resistant materials, with high durability and service life.