Hydraulically excited rotary directional valve

Abstract

The invention provides a hydraulic shock excitation rotation reversing valve. The hydraulic shock excitation rotation reversing valve adopts a coaxial double-valve-element structure with two cylinder oil cavities and one valve element in each cylinder, an oil receiving nozzle is arranged on the part, between each valve element and a cylinder movable sealing matching position, of the corresponding cylinder, another oil receiving nozzle is arranged on the part, between each valve element and a cylinder end cover, of the corresponding cylinder, a plurality of through oil grooves are evenly formed in the peripheral surface of each valve element in the axial direction, and the oil through grooves of the two valve elements are staggered by 1 / 2 per indexing central angle. According to the technical scheme, the axial loads on valve element shafts are eliminated, high stability and reliability of reversing operation are guaranteed, and the hydraulic shock excitation rotation reversing valve has the technical advantage of high shock excitation output efficiency.

Description

technical field [0001] The patent application of the present invention relates to a hydraulic reversing valve, in particular to a hydraulic rotary reversing valve that drives a hydraulic vibrator to reversing quickly and meets the output requirements of the excitation frequency. Background technique [0002] One of the main technical means of hydraulically excited vibration is piston valve-controlled follow-up, and its control reversing valve mainly includes a rotating reversing valve and a moving reversing valve. Since the reversing speed of the hydraulic rotary directional valve is higher than that of the mobile directional valve, it has the technical advantages of high output vibration frequency and easy structure. Therefore, the hydraulic exciter equipped with the rotary directional valve has a wider range of applications. At present, the typical structure of the hydraulic rotary reversing valve is a single spool structure. The spool is rotated and installed in the valve...

AI Technical Summary

Problems solved by technology

It can be seen from the above that the two sides of the spool bear hydraulic pressure of different heights, so a thrust bearing is added to one end of the spool shaft to bear the axial force, and the resulting technical problem is that the shaft drive increases and the shaft drive burden increases. large, and the energy consumption of the excitation drive is increased; another technical problem in the structure of the single-spool reversing valve is that the valve core is affected by the high pressure and low pressure of the oil chambers on both sides, which may easily lead to a gap between the circumferential surface of the valve core and the inner wall of the cylinder. seal leak

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