Multi-position five-way reversing valve without ring groove logic and with bidirectional throttling third working oil port
A working oil port, two-way throttling technology, used in fluid pressure actuating devices, fluid pressure actuating system components, servo motor components, etc. commutation etc.
Active Publication Date: 2020-12-11
QILU UNIV OF TECH +1
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Problems solved by technology
Slight clamping of the reversing valve will increase the frictional resistance of the valve stem when it moves, resulting in sluggish movement or even disordered movement; and severe hydraulic clamping will make the valve stem completely stuck and unable to move, which can be manifested as The reversing valve cannot be reversing
At the same time, due to the unbalanced pressure acting in the radial gap around the valve stem, the valve stem produces reversing vibration, which is easy to cause fatigue damage to the hydraulic components in the hydraulic system, reducing the reversing performance and the service life of the valve.
Method used
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[0029] Below in conjunction with accompanying drawing and embodiment, further elaborate the present invention. In the following detailed description, certain exemplary embodiments of the invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments can be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
[0030] Such as figure 1 , image 3 and Figure 4 As shown, the non-ring groove logic multi-position five-way reversing valve with two-way throttling of the third working oil port includes a valve body 11, and a valve cavity 12 is arranged in the valve body 11, and a valve cavity 12 is installed in the valve cavity 12. A valve stem 13, a valve stem return device is installed between one end of the valve stem 13 and the...
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The invention discloses a multi-position five-way reversing valve without ring groove logic and with a bidirectional throttling third working oil port. The multi-position five-way reversing valve comprises a valve body, a valve cavity and a valve rod, wherein one end of the valve rod is connected with a valve rod return device; seven valve body oil grooves are formed in the valve body; an oil return port, an oil inlet, a first working oil port, a second working oil port and the third working oil port are formed in the valve body; three bosses are arranged on the valve rod; two valve rod oil grooves are formed among the three bosses; the axial widths of the bosses are greater than those of the valve body oil grooves; a first radial oil hole and a second radial oil hole which communicate with the valve cavity are formed in the first boss; and a valve rod oil cavity communicating with the first radial oil hole and the second radial oil hole is formed in the valve rod. The multi-position five-way reversing valve is simple in structure; the valve body oil grooves and the valve rod have strict logic; the function of changing the flow direction of oil is realized through the logic; the multi-position five-way reversing valve is sensitive in transposition reaction, free of vibration and valve clamping phenomenon during reversing and high in reliability of a working device.
Description
technical field [0001] The invention relates to a hydraulic valve, in particular to a multi-position five-way reversing valve with no annular groove logic and a third working oil port with two-way throttling. Background technique [0002] The reversing valve is one of the key components in hydraulic systems such as construction machinery and agricultural machinery. At present, in the multi-channel hydraulic reversing valve widely used in the hydraulic system, the contact surface between the valve stem boss and the valve body is too small, and there is a phenomenon of clamping. Slight clamping of the reversing valve will increase the frictional resistance of the valve stem when it moves, resulting in sluggish movement or even disordered movement; and severe hydraulic clamping will make the valve stem completely stuck and unable to move, which can be manifested as The reversing valve cannot be reversing. At the same time, due to the unbalanced pressure acting in the radial g...
Claims
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IPC IPC(8): F15B13/02F15B21/00
CPCF15B13/02F15B21/00
Inventor 于凡翔李瑞川程懿
Owner QILU UNIV OF TECH