DESIGN AND RESEARCH IN THOERY ABOUT
STEERING PUMPS OF POWER-SAVING TYPE
ABSTRACT
The quality of power assisted steering pump influences the automobile steering systematic normal running directly. The double action vane pump using extensively at present has great energy waste; however the single action vane pump, owing to output flow varying with load, can reduce energy waste. So text adopted single action vane pump to replace double action this vane pump, optimized port plate design and emulated its distributing flow characteristic. The result indicated that this steering pump nicer boosting and unloading pressure ability in advance . This text studied the pump's flow characteristic and mechanics characteristic of its stator and drawed the conclusion that vane number is odd or even number has no relation with flow pulses when vane number is even number, force the stator suffering along the X anxis is less than when vane number is neighboring odd number and its direction is constant. These Center-open EHPS system, Center-closed EHPS system Though analyzing and comparing, it can be proved that the EHPS system will be dominant and developed mainly in the future. The variable speed control hydraulic technology is a new kind of energy saving transmission technique. In this paper, a new variable speed control hydraulic power unit is developed. In addition, this text used the software PRO/E to build the three-dimensional model of the steering pump, thereby avoiding the waste and loss of manpower, material resources, financial resources in the course of processing and assembling in the future.
In a word, this text has certain actual meanings in solving the vehicle energy consumption problem. At the same time, there is important reference value to the fictitious design of the complicated hydraulic pressure component.
KEY WORDS：Electro-Hydraulic Power Steering(EHPS) of the pump, Center-open, Center-closed, Frequency conversion motor, Three-dimensional modeling
