Energy-saving vibration-reduction type flux amplification valve

Abstract

The present invention provides an energy-saving damping type amplificative valve. Four throttling groove groups are symmetrical with midline of the main valve core 5, the throttling groove groups on two sides of midline comprise a first oil trough 5a, a second oil trough 5b, a third oil trough 5c and a fourth oil trough 5d in pair respectively, the other two throttling groove groups comprise a first oilreturning groove 5e, a second oilreturning groove 5f, a third oilreturning groove 5g and a fourth oilreturning groove 5h in pair respectively, four throttling groove groups form four main valve port respectively with the first oil intake throttling edge 12a, the second oil intake throttling edge 12b, the first oilreturning throttling edge 12c, the second oilreturning throttling edge 12d, the pilot valve throttling grooves 5i on two ends of the main valve core 5 form two pilot valve port with the first pilot valve throttling edge 12e and the second pilot valve throttling edge 12f on two ends of valve body 12 respectively, the first ring groove 5m and the second ring groove 5n are provided on the left of the main valve core 5, an oil guide ring groove 12k are arranged on the corresponding position of the valve body 12, the first unloading edge 12g and the second unloading edge 12h are provided on the valve body 12 corresponding the position of the first ring groove 5m, seven external connection oil ports are provided on the valve body 12.

Description

technical field [0001] The invention relates to a hydraulic proportional reversing valve, in particular to a flow amplifying valve. Background technique [0002] The hydraulic flow amplification valve is widely used in the steering hydraulic system of medium and large construction machinery. Its function is to amplify the flow and hydraulic power of the pilot control flow output by the steering gear according to a certain amplification factor, and control the movement of the hydraulic actuator. At present, the steering hydraulic system has problems such as vibration at start time, crawling vibration, and vibration at stop time, which lead to poor operating comfort of construction machinery; at the same time, the steering hydraulic pump cannot be effectively unloaded, resulting in high energy consumption of the system, temperature rise, The main reason for the above problems is the poor performance of the flow amplification valve. Foreign companies such as Kawasaki Heavy Ind...

AI Technical Summary

Problems solved by technology

At present, the steering hydraulic system has problems such as vibration at start time, crawling vibration, and vibration at stop time, which lead to poor operating comfort of construction machinery; at the same time, the steering hydraulic pump cannot be effectively unloaded, resulting in high energy consumption of the system, temperature rise, The main reason for the above problems is the poor performance of the flow amplification valve.

Foreign companies such as Kawasaki Heavy Industries, DANFOSS, Carter and other companies have developed some flow amplification valves with better performance, but their structures are more complicated and expensive.

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