Steering pump device of double-acting variable vane

Abstract

The invention discloses a steering pump device of a double-acting variable vane, comprising a stator, a rotor and a vane. The vane is installed in a vane groove on the rotor. A sliding groove is arranged between every two vane grooves on the rotor. The inside of the sliding groove is equipped with a sliding block. A spring groove is opened within the rotor to mount a single-leaf spring. The single-leaf spring is connected with the sliding block through a long-pole screw. The sliding block is slidable vertically within the groove. The sliding of the sliding block is limited through the sliding groove. By adopting the steering pump of the invention in the technical scheme, a state that the displacement of the steering pump is increased with the increasing of an engine speed is changed through arranging the sliding groove between the two vanes of the rotor, which effectively reduces the output of excess flow within the steering pump, and the energy loss caused by the excess flow generated by throttling an overflow valve.

Description

Technical field [0001] The invention relates to a power source device of a hydraulic steering system, and is particularly applied to a vane type steering pump device in a hydraulic power steering system of a medium and heavy-duty automobile. Background technique [0002] At present, as international crude oil prices continue to rise, reducing crude oil consumption is increasingly being valued by countries all over the world, and "energy saving and emission reduction" has become the world's lingua franca. Most commercial vehicles and cars use hydraulic power steering, but hydraulic power steering requires a certain amount of energy. After research, it is found that the current hydraulic power steering system consumes about 3% of the energy of the prime mover, but the actual steering consumes less than 40% of the energy. The other 60% of the energy is not only wasted, but also Increase the heating of the hydraulic system, reduce the service life of the system, generate noise and i...

AI Technical Summary

Problems solved by technology

During the driving process of the car, the engine runs at a speed range higher than the idle speed most of the time, and more than 80% of the time is in a straight line or waiting state without turning, so most of the oil output by the oil pump passes through the flow control valve and the steering control valve. Flow back into the storage tank, causing a lot of damage

[0003] The hydraulic steering pumps currently used in China are composed of fixed-difference pumps and fixed-difference relief valves. In practical applications, when the hydraulic pump is running at medium and high speeds, the excess output flow in the pump is overflowed by the relief valve, resulting in a huge pump loss. Energy loss, increasing the fuel consumption of the car

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