The power steering pump is the power source of the hydraulic power steering system. The engine is used as the transmission medium to convert the mechanical energy into hydraulic energy. The steering oil converts the hydraulic energy into mechanical energy through the hydraulic oil output by the oil pump, thereby reducing the driver's operation intensity. Improve the maneuverability of the vehicle.

The internal pressure of the power steering pipeline is controlled by the pressure safety valve to ensure the safety of the steering system. 3. The flow control valve controls the flow of the steering system to ensure that the driver turns to feel when the vehicle is driving at a high speed. At present, the steering pump for automobiles is mostly a double-acting vane type steering pump, which is mainly composed of a common double-acting vane pump, a flow control valve and a pressure safety valve; the double-acting vane pump provides high-pressure oil, and the flow control valve ensures that the steering pump output is suitable for the whole vehicle. The required flow rate, the pressure relief valve controls the maximum output pressure of the steering pump, and for a gasoline engine with a small engine power, a pressure switch should also be provided.

Classification of power steering pumps

1.From the distribution of models, can be divided into: commercial vehicle steering pump and passenger car steering pump.

2.From the structural form, it can be divided into: vane type steering pump, gear type steering pump and plunger type steering pump; among them, double-acting vane type steering pump has various advantages such as small size, low noise and high volumetric efficiency. It is widely used.

3.From the drive form, can be divided into: gear-driven steering pump, pulley-driven steering pump, cross-slip (spline) type steering pump; wherein the pulley drive steering pump is mainly used to drive passenger cars with less torque Gear-driven and cross-slide keys are more common on commercial vehicles.