Detection device for valve element displacement of proportional direction valve
A proportional directional valve and detection device technology, which is applied in fluid pressure actuating devices, fluid pressure actuating system testing, mechanical equipment, etc., can solve the problem of low reliability of the flow micro-movement characteristic curve, large displacement increment, proportional directional valve Large flow error and other problems
Active Publication Date: 2020-09-22
WUHAN MARINE MACHINERY PLANT
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[0004] However, the displacement increment of the above method is large, and it is difficult to realize the control of the small incremental displacement of the valve core, which will make the flow error of the obtained proportional directional valve large, resulting in low reliability of the drawn flow micro-movement characteristic curve
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[0040] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0041] figure 1 is a cross-sectional view of a proportional directional valve provided by an embodiment of the present disclosure, such as figure 1As shown, the proportional directional valve includes a spool 110, a valve body 120 and two hydraulic control bonnets 130. The spool 110 is inserted in the valve body 120, and both ends of the spool 110 pass through the valve body 120. The valve cover 130 is arranged on one side of the valve body 120 and seals one end of the valve core 110 , and the other hydraulic control valve cover 130 is arranged on the other side of the valve body 120 and seals the other end of the valve core 110 . Each hydraulic control valve cover 130 is provided with a control oil inlet 131, and the hydraulic oi...
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The invention provides a detection device for valve element displacement of a proportional direction valve, and belongs to the technical field of hydraulic element testing. The detection device comprises an end cover, an adjusting rod and a limiting seat, the end cover is of a tubular structural piece, the end cover comprises an opening end and a sealing end, the opening end is used for being detachably installed on a valve body, an elastic piece is arranged in an inner cavity of the end cover, one side of the elastic piece is used for being fixed to one end of a valve element, and the other side of the elastic piece abuts against the sealing end. The adjusting rod is in sealing sliding fit with the sealing end, an adjusting nut sleeves the second end of the adjusting rod, and a mark is arranged on the peripheral wall of the adjusting nut. The limiting seat comprises a supporting plate and a limiting plate, the limiting plate is located on the supporting plate, the limiting plate is used for backstopping the adjusting nut, and the adjusting nut is located between the end cover and the limiting plate. Through the detection device for the valve element displacement of the proportional direction valve, the micro increment displacement of the valve element can be controlled, and thus the reliability of a flow micro dynamic characteristic curve is high.
Description
technical field [0001] The disclosure belongs to the technical field of hydraulic component testing, in particular to a detection device for the displacement of a spool of a proportional directional valve. Background technique [0002] Proportional directional valve is a hydraulic component that can control both oil direction and flow, and it is widely used in hydraulic control systems. [0003] Before the proportional directional valve leaves the factory, it needs to conduct a flow micro-movement characteristic test, that is, to control the small incremental displacement of the spool, and then draw a flow micro-movement characteristic curve from the measured spool displacement and flow rate to guide subsequent use. In the related art, the movement of the spool is driven by hydraulic pressure, thereby recording the displacement and flow rate of the spool, and finally realizing the drawing of the micro-movement characteristic curve. [0004] However, the displacement increme...
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Login to View More IPC IPC(8): F15B19/00
CPCF15B19/00
Inventor 汤波方敏吴建磊叶建刘琥铖
Owner WUHAN MARINE MACHINERY PLANT