Valve element sealing structure of control valve of excavator
A sealing structure and control valve technology, which is applied to the sealing of engines, soil movers/shovels, valve devices, etc., can solve the problems of reduced service life of control valves, affecting the sealing of control valves, hydraulic oil leakage, etc., to achieve Effect of increasing sealing performance and improving sealing performance
Pending Publication Date: 2020-11-24
滁州市同乐机械制造有限公司
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Problems solved by technology
Since the valve core needs to frequently move along the valve hole during work, and the working environment of the excavator is often very harsh, the external dust and particles often enter the valve body along the gap between the valve core and the valve hole. Destroying the sealing structure of the sealing ring will affect the sealing performance of the entire control valve, which will lead to a sharp decrease in the service life of the control valve and easily cause hydraulic oil leakage in the valve body
Method used
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Embodiment Construction
[0018] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.
[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer" etc. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.
[0020] Such as Figure 1 to Figure 2 As shown,...
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The invention provides a valve element sealing structure of a control valve of an excavator. The valve element sealing structure comprises a valve body, a valve element and a sealing mechanism. A valve hole is formed in the valve body. The sealing mechanism comprises a sleeve, a first seal ring, a first positioning ring, a spring, a gasket, a second seal ring and a second positioning ring. A regular hexagon-shaped block is fixedly arranged at the top end of the sleeve. A through hole is formed in the middle of the regular hexagon-shaped block, the first seal ring, the first positioning ring, the spring, the gasket, the second seal ring and the second positioning ring are successively arranged in the sleeve from top to bottom, the second positioning ring is in threaded connection to the sleeve, two ends of the spring lean against the first positioning ring and the gasket, separately, the sleeve is mounted on the upper part of the valve hole in a threaded connection manner, the first positioning ring is fixedly connected to the valve element, an annular slot is formed in the inner wall of the through hole, a dust ring is arranged in the annular slot, and the dust ring is arranged onthe valve element in a sleeving manner. The valve element sealing structure provided by the invention can improve sealing performance between the valve element and the valve hole, prevent dust and particulate matters from entering the valve body and prevent leakage of hydraulic oil in the valve body.
Description
technical field [0001] The invention belongs to the technical field of excavator control valves, and in particular relates to a valve core sealing structure of an excavator control valve. Background technique [0002] Excavator pilot hydraulic system is an important part of excavator hydraulic system. The handle valve and foot valve are the main components of the pilot hydraulic system of the excavator. The sealing of the valve core seriously affects the service life of the control valve, affects the overall image of the excavator, and reduces the user's trust in the machine and the brand. Spend. [0003] The control valve of the traditional excavator is often provided with a valve hole, a movable valve core is arranged in the valve hole, and a sealing ring is arranged between the valve core and the valve hole. Since the valve core needs to frequently move along the valve hole during work, and the working environment of the excavator is often very harsh, the external dust ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B13/02F16J15/16F16K51/00E02F9/22
CPCF15B13/021F16J15/16F16K51/00E02F9/2267
Inventor 李震
Owner 滁州市同乐机械制造有限公司