High-pressure high-flow alternating-current servo direct-driven threaded flow valve

A technology of AC servo and AC servo motor, which is applied in the field of hydraulic valves, can solve the problems of sensitive oil pollution, etc., and achieve the effects of simple use, easy manufacture, and safe working performance

Inactive Publication Date: 2012-08-15
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a high-pressure and large-flow AC servo direct-drive threaded flow valve, which can realize simplification of structure and high efficiency of use, improve the stability of the system, and Applicability in environments such as , large flow, etc., especially overcoming the problem of being sensitive to oil pollution

Method used

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  • High-pressure high-flow alternating-current servo direct-driven threaded flow valve
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  • High-pressure high-flow alternating-current servo direct-driven threaded flow valve

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] refer to figure 1 , a high-pressure and large-flow AC servo direct-drive threaded flow valve, including a valve seat 1, an end cover 2, an AC servo motor 3, a ring 4, a harmonic reducer 5, a coupling 6, an input shaft 7, and a key 8 , spool 9, valve sleeve 10, the harmonic reducer 5 is fixed on the inner boss of the end cover 2 with screws through the ring 4, the AC servo motor 3 is fixed on the outer end surface of the end cover 2, the output of the AC servo motor 3 The shaft is connected with the input end of the harmonic reducer 5 with a coupling 6, the output end of the harmonic reducer 5 is connected with the input shaft 7 by screws, the input shaft 7 drives the spool 9 through threads, and the two keys 8 are respectively installed on the In the key grooves on both sides of the valve core 9, when the valve core 9 is inserted into the valve sleeve 10 by m...

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Abstract

Disclosed is a high-pressure high-flow alternating-current servo direct-driven threaded flow valve. An alternating-current servo motor directly drives a valve spool to open and close by the aid of transmission of threads, and the threads only need to transmit driving force on a single side during integral operation of the valve due to hydraulic force, and are selectively one-way transmission saw-toothed threads. The valve is simple in structure, accurate in control and convenient in use, can be directly digitally controlled by a computer and has excellent buffering and positioning performances, the requirement on positioning at an optional point can be met, a closed-loop system with an electrical feedback function can be realized, particularly, the problem that an original servo valve is sensitive to oil pollution can be effectively solved, and shortcomings that the original servo valve is used difficultly in high-pressure and high-flow environments and the like are also overcome. In addition, the valve is wide in working pressure range and high in flow, and can also work under extremely low oil supply pressure, the dynamic performance of the valve is rarely affected by the oil supply pressure, and the efficiency of a system can be improved due to the fact that intermediate transmission links are few.

Description

technical field [0001] The invention belongs to the technical field of hydraulic valves, in particular to a high-pressure and large-flow AC servo direct-drive threaded flow valve. Background technique [0002] The electro-hydraulic servo valve is a complex electro-hydraulic component. In the electro-hydraulic servo system, as a bridge connecting the electrical part and the hydraulic part, it is the core component of the electro-hydraulic servo control system. In recent years, with the rapid development of large-scale hydraulic equipment such as die-casting machines, the market demand for electro-hydraulic servo systems, especially electro-hydraulic servo valves, has increased, and higher technical requirements have been put forward for them. The widely used electro-hydraulic proportional throttle valves are mainly two-stage or three-stage nozzle flapper valves and jet pipe valves with pilot valves. Although the traditional hydraulic servo system has excellent performance, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 赵升吨李磊张琦范淑琴
Owner XI AN JIAOTONG UNIV
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