Power steering pump

Abstract

It is disclosed that a power steering pump. Which is characterized in that the front oil distributing plate is enclosed with front wall of the inner cavity of the pump body to form a front outlet cavity, a valve bore being formed at outer circumference side of the inner cavity of the pump body communicates with the front outlet cavity, a flow securing control valve is disposed within the valve bore, the front outlet cavity communicates with an oil outlet hole at the front portion of pump body through a high-pressure oil passage. The invention adopts a front high-pressure cavity configuration of the pump body to shorten the length of high-pressure oil passage, which hence avoids steering pump failure caused by aggressive overheating generated in the traditional configuration with excessive length of the flow passage and bending.

Description

Technical field [0001] The invention relates to an automobile hydraulic power steering booster pump, in particular to an automobile hydraulic power steering booster pump capable of reducing the temperature of the automobile steering system. Background technique [0002] In recent years, with the rapid development of my country's national economy and automobile industry, there has been an increasing demand for large-tonnage double front axle structures, mining and engineering vehicles. Due to the increase in the load of vehicles, driving the steering of the front wheels of vehicles is required. The torque corresponding to the increase in the steering gear needs to increase the cylinder diameter of the steering gear, and the required flow rate of the steering pump will increase. At the same time, the double-front axle vehicle adds a booster cylinder, which also needs to increase a certain flow rate. The flow rate is large, correspondingly, the temperature of the steering system is r...

AI Technical Summary

Problems solved by technology

[0004] (1) attached figure 2 In the medium-density section line display part, the three holes of the high-pressure oil flow channel need to be processed, and the processing process increases the cost, and the passage is not smooth, which affects the smooth operation of the high-pressure oil;

[0005] (2) If the flow path is long, there will be a loss in flow pressure. On the one hand, it cannot work according to the normal state, the direction cannot be moved or the steering is heavy. On the other hand, if the flow pressure does not reach the required value, the stability of the steering system will be affected. and life expectancy will be reduced;

[0006] (3) The flow path is long and complicated, which will cause the temperature of the oil to rise too fast, and the temperature of the entire system will be high (the oil temperature of engineering vehicles and mining vehicles can reach 100 ° C ~ 160 ° C), which will accelerate the aging of the seals. It is easy to cause oil leakage. Excessive oil temperature may also lead to a sharp decrease in the kinematic viscosity of the oil, and the wear of the internal parts of the steering system will increase, resulting in a greatly reduced service life of the entire steering system.

When overflowing at low speed, its opening is small, resulting in high overflow speed, easy to cause heat generation, and rapid oil temperature rise. At high temperature, the internal parts of the steering pump are easy to wear and reduce the service life of the steering pump.

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