Hydraulic rotation valve with square-wave-shaped valve core
A technology of hydraulic rotation and valve core, applied in the field of hydraulic rotary valve, can solve the problems of high price and complex structure of hydraulic valve, and achieve the effect of reducing machining accuracy, simple structure and easy assembly
Inactive Publication Date: 2012-05-02
XI AN JIAOTONG UNIV
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Problems solved by technology
Existing hydraulic valves often require complex structures and high-precision processing to meet these requirements, resulting in high prices
Method used
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0017] Such as figure 1 As shown, the valve body includes an upper bonnet 1, a valve body 2, a sealing ring 3-8, a valve core 9, and a lower bonnet 10; the upper bonnet 1 and the lower bonnet 10 are firmly connected to the end face of the valve body 2 by screws , control the spool in the inner cavity of the valve to limit its axial movement. The spool 9 is made into a stepped shape at the junction with the bonnet, such as figure 1 In the enlarged view of detail A, the valve core is made into a stepped shape at the junction with the valve cover, and cooperates with the valve body and the valve cover to form two cavities 11, and the two cavities are connected through four axial holes 12. The valve core 9 is provided with a protrusion 13 on the periphery of its middle part, and the protrusion has a square wave structure, as shown in FIG. 2( a ).
[0018] As shown in ...
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The invention relates to an improved three-position four-way hydraulic rotation valve, which is mainly formed by an upper valve cover, a lower valve cover, a valve core, a valve body and a sealing ring. A P port and a T port of the valve body are made into rectangular shapes so that flow or pressure output of the valve is approximately in direct proportion with a relative corner formed by the valve core and the valve body. The middle portion of the valve core is made into a square-wave-shaped structure so as to divide a cavity of the valve body into four circulating areas. Four through holes are processed in the axial direction so that the upper end and the lower end of the valve core are communicated, simultaneously the combined end face of the valve core and the valve cover is made into stair shape, and T-port grooves at two ends of a traditional hydraulic valve structure are removed so that the length of the valve core is shortened. The hydraulic rotation valve can greatly reduce radial unbalanced force and axial unbalanced force, can bear higher oil pressure compared with a traditional hydraulic valve, simultaneously reduce processing accuracy of the valve core and lower production cost, and is simple in structure and convenient to use and maintain.
Description
Technical field: [0001] The invention belongs to the technical field of hydraulic control, and in particular relates to a hydraulic rotary valve with a square wave valve core. Background technique: [0002] Hydraulic valve is a key component used to control the pressure, flow and direction of fluid in fluid transmission. Its application fields are becoming wider and wider. The main technical requirements include high reliability, resistance to oil pollution, convenient use and maintenance, low cost and high precision. Quick response control liquid flow or pressure output. Existing hydraulic valves often require complex structures and high-precision processing to meet these requirements, resulting in high prices. With the research and development of new drivers, the development of mechanical design and manufacturing technology and microelectronics technology, the electro-hydraulic servo valve with direct drive structure has developed rapidly, such as literature (1) Zhang Gua...
Claims
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IPC IPC(8): F15B13/02
Inventor 庄健俞珏
Owner XI AN JIAOTONG UNIV