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High-pressure and high-flow alternating-current servo direct-driven eccentric shaft type flow valve

An AC servo and AC servo motor technology, applied in the field of hydraulic valves, can solve problems such as oil pollution sensitivity, and achieve the effects of simple use, simple and reliable feedback coefficient adjustment, and simple overall structure

Inactive Publication Date: 2014-11-05
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 eccentric shaft flow valve, which can realize simplification of structure and high efficiency of use, improve the stability of the system, and Applicability in high pressure, large flow and other environments, especially overcoming the problem of sensitivity to oil pollution

Method used

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  • High-pressure and high-flow alternating-current servo direct-driven eccentric shaft type flow valve
  • High-pressure and high-flow alternating-current servo direct-driven eccentric shaft type flow valve

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] refer to figure 1 , a high-pressure and large-flow AC servo direct-drive eccentric shaft flow valve, including an AC servo motor 1, a harmonic reducer 2, a coupling 3, a bell housing 4, an end cover 5, a valve seat 6, a valve sleeve 7, Spool 8, connecting rod 9, bearing 10, eccentric crankshaft 11, bearing cover 12, cover plate 13, the output shaft of AC servo motor 1 is connected to the input end of harmonic reducer 2 through coupling 3, and the harmonic reducer The output end of 2 is connected with the eccentric crankshaft 11 by screws, and the eccentric part of the eccentric crankshaft 11 cooperates with the bearing shell of the connecting rod 9. The two shoulders of the eccentric crankshaft 11 are respectively provided with two pairs of four bearings 10, and the bearings 10 use a pair of two bearings in total. The cover 12 is fixed, the shoulder of the be...

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Abstract

The invention provides a high-pressure and high-flow alternating-current servo direct-driven eccentric shaft type flow valve. After the speed of an alternating-current servo motor is reduced through a harmonic speed reducer, the opening / closing motion of a valve core is driven through an eccentric crank shaft and a connecting rod mechanism; and the valve has the advantages of simple structure, accuracy for controlling and convenience for use. A computer can be directly used for carrying out digital control and the flow valve has good buffering and positioning performances, can meet the requirements of positioning at any point and can realize a closed-loop system through an electrical feedback; and particularly, the flow valve can better solve the problem that an previous electric liquid servo valve is sensitive to oil liquid, and also overcomes the disadvantages that the previous electric liquid servo valve is difficult to use in high-pressure and high-flow environments and the like; and the work pressure range of the valve is wide and the flow is high, so that the valve can work under a very low oil supplying pressure and the influences of the oil supplying pressure on a dynamic performance are very small; and a few of middle transmission links are used so that the efficiency of the system can be improved.

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 eccentric shaft flow valve. Background technique [0002] 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, its structure is complex and difficult to manufacture, and the intermediate links More, reducing the overall efficiency, especially the electro-hydraulic servo valve is particularly sensitive to oil pollution. The pollution of the working oil will ...

Claims

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Application Information

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Patent Type & Authority Patents(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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