High-flow plug-in mounting type three-position four-way electro-hydraulic servo valve and control method thereof
A plug-in, servo valve technology, applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problem of frequency response reduction and achieve good response performance and wide application prospects
Active Publication Date: 2015-10-28
HUAZHONG UNIV OF SCI & TECH
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[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a large-flow plug-in three-position four-way electro-hydraulic servo valve and its control method, the purpose of which is to solve the problem of the existing electro-hydraulic servo valve with the increase of flow rate. , a technical problem with reduced frequency response
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[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0057] The structural principle of the large-flow plug-in three-position four-way functional electro-hydraulic servo valve provided by the embodiment is as follows: figure 1 As shown, it includes the first cartridge type two-way servo valve I, the second cartridge type two-way servo valve II, the third cartridge type two-way servo valve III, the fourth cartridge type two-way servo valve IV, and ...
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Disclosed is a high-flow plug-in mounting type three-position four-way electro-hydraulic servo valve. The high-flow plug-in mounting type three-position four-way electro-hydraulic servo valve comprises a control unit and four plug-in mounting type two-way servo valves. Four signal output ports of the control unit are connected with control signal input ports of the plug-in mounting type two-way servo valves respectively, and four signal input ports of the control unit are connected with valve plug displacement signal output ports of the plug-in mounting type two-way servo valves respectively. Every two plug-in mounting type two-way servo valves are connected in series, an oil outlet of one of every two connected plug-in mounting type two-way servo valves is connected with an oil inlet of the other plug-in mounting type two-way servo valve, so that two series-connected dual-valves are formed. Oil outlets of the series-connected dual-valves are used for being connected with an oil tank, oil inlets of the series-connected dual-valves are used for being connected with a hydraulic oil source, equivalently, the series-connected dual-valves are connected in parallel, so that a bridge type loop is formed, and the high-flow plug-in mounting type electro-hydraulic servo valve with a three-position four-way function is formed. The plug-in mounting type two-way servo valves are controlled by the control unit to change the opening degrees of valve ports so that changes of the flow direction and the flow quantity of oil can be achieved. The contradiction between the high flow and the high frequency response of an existing electro-hydraulic servo valve is effectively overcome, and the high-flow plug-in mounting type three-position four-way electro-hydraulic servo valve has the technical characteristics of the high flow and the high frequency response.
Description
technical field [0001] The invention belongs to the field of fluid transmission and control, and more specifically relates to a large-flow plug-in three-position four-way electro-hydraulic servo valve and a control method thereof. Background technique [0002] The electro-hydraulic servo system is widely used in the field of industrial control because of its advantages of large output power, high control precision and compact structure. With the continuous development of the industrial application field of electro-hydraulic servo system, the requirements for electro-hydraulic servo system are getting higher and higher. The electro-hydraulic servo valve, as the connection hub between the electrical unit and the hydraulic unit in the electro-hydraulic servo system, is a key control element in the system, and its requirements are getting higher and higher accordingly. In the large-scale hydraulic damper high-frequency electro-hydraulic loading test bench, the servo system is r...
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IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 杨钢李宝仁杜经民傅晓云高隆隆高磊石邦凯
Owner HUAZHONG UNIV OF SCI & TECH
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