Multi-way valve and engineering machinery
A multi-way valve and valve body technology, applied in the field of multi-way valve, can solve the problems of large temperature influence, slow start response, and the actuator cannot start smoothly, so as to reduce impact and avoid slow response.
Pending Publication Date: 2020-10-02
SUOTE TRANSMISSION EQUIP
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Problems solved by technology
[0007] The purpose of the present invention is to provide a multi-way valve and construction machinery, so as to alleviate the problem that the orifice of the check valve core of the existing multi-way valve is greatly affected by temperature, and the startup response is slow, and the actuator cannot start smoothly. technical issues
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[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] like Figure 2 to Figure 8 As shown, the multi-way valve provided by this embodiment includes a valve body 1, a main valve core 2 and a retaining sleeve 6; both ends of the valve body 1 are provided with end caps 4, and the main valve core 2 is arranged on the main valve body 1. In the spool hole 3, the retaining sleeve 6 is set on the end of the main valve core 2, the end cover 4, the retaining sleeve 6 and the end face of the valve body 1 enclose the first cavity A, the main valve core 2 and the retaining sleeve...
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The invention provides a multi-way valve and engineering machinery, and relates to the technical field of multi-way valves. The multi-way valve comprises a valve body, a main valve element and a spacer sleeve, a first cavity is defined by an end cover, the spacer sleeve and the end face of the valve body, a second cavity is defined by the main valve element and the inner side wall of the spacer sleeve, a fixed throttling hole and a pressure relief structure are arranged between the first cavity and the second cavity, the fixed throttling hole and the pressure relief structure are used for making the first cavity communicate with the second cavity correspondingly, and the pressure relief structure can be opened and closed so that the moving speed of the main valve element can be adjusted. When the main valve element returns to the neutral position, liquid in the second cavity can communicate with the first cavity through the fixed throttling hole and the pressure relief structure, the main valve element can move rapidly, and the liquid in the second cavity can only flow to the first cavity through the fixed throttling hole as the main valve element gets close to the neutral position, so that the speed of the main valve element is reduced, response delay during starting of an executing mechanism is avoided, and impact during deceleration stop can be relieved.
Description
technical field [0001] The invention relates to the technical field of multi-way valves, in particular to a multi-way valve and engineering machinery. Background technique [0002] The structure of the existing multi-way valve is as follows: figure 1 As shown, there is a main spool hole 03 on the valve body 01, the main spool hole 03 is equipped with the main spool 02, the two ends of the main spool hole 03 are equipped with end caps 04, and the end caps 04 and the end faces of the valve body 01 A closed oil chamber 0A is formed, and a spring 05 and a stopper 06 are installed in the closed oil chamber 0A. When the hydraulic excavator equipped with the main valve of this structure is operated, the pilot pressure oil enters the closed oil chamber 0A formed by the end cover 04 and the valve body 01, so that the main valve core 02 moves to the other end, and the pressure oil at the other end In this process, once the main spool 02 returns to the neutral position, under the con...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B13/02
CPCF15B13/02F15B13/024
Inventor 松本哲祁志强杨密密
Owner SUOTE TRANSMISSION EQUIP