Hydraulic servo proportional valve

A hydraulic servo and proportional valve technology, applied in the field of hydraulic valves, can solve the problems affecting adjustment accuracy and response speed, small flow adjustment range, complex structure, etc. Effect

Active Publication Date: 2021-05-28
HANGZHOU REBOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a servo proportional flow valve not only has a complex structure and a relatively large volume, but also generates unnecessary pressure drop after passing through the flow channel of the valve body, which affects the adjustment accuracy and response speed; in addition, the existing servo proportional flow valve adopts the form of a slide valve , the flow adjustment by opening a throttling groove on the slide valve not only has a small flow adjustment range, but also has low precision.

Method used

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] combine Figure 1 to Figure 6 As shown, the hydraulic servo proportional valve in this embodiment includes a valve body 1 , a first valve core 2 and a second valve core 3 .

[0027] The valve body 1 is provided with a first working port 11 , a second working port 12 and a pressure relief port 13 . The first spool 2 and the second spool 3 are both arc-shaped spools, and are coaxially fixed in the same plane in the valve body 1 with the positional relationship that the first spool 2 is sleeved outside the second spool 3 , At the same time, the first valve core 2 and the second valve core 3 can respectively perform reciprocating rotation relative to the valve body 1 .

[0028] Wherein, along the reciprocating rotation direction of the second valve core 3 relative to the valve body 1 , the two ends of the second...

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Abstract

The invention belongs to the technical field of hydraulic valves and discloses a hydraulic servo proportional valve. The hydraulic servo proportional valve comprises a valve body, a first valve element and a second valve element; the valve body is provided with a first working opening, a second working opening and a pressure relief opening; the first valve element and the second valve element are located in the valve body and can do reciprocating motion relative to the valve body; the two ends of the second valve element are located in a first control cavity and a second control cavity respectively in the reciprocating motion direction of the second valve element relative to the valve body, the first working opening and the pressure relief opening are selectively communicated with the first control cavity, and compared with the pressure relief opening, the first working opening is closer to the terminal position of the first control cavity; the second control cavity is communicated with the second working opening; and the first valve element is provided with a communicating groove, and the communicating groove is located in the position, between the first working opening and the second control cavity, in the first valve element so as to control the communicating relation between the first working opening and the second control cavity. The hydraulic servo proportional valve is simple in structure, small in size and higher in adjusting precision.

Description

technical field [0001] The invention belongs to the technical field of hydraulic valves, in particular to a hydraulic servo proportional valve. Background technique [0002] The electro-hydraulic servo / proportional control system is widely used in aerospace, weapons, ships, large power stations and material testing machines due to its core advantages of high power-to-weight ratio, fast dynamic response and convenient signal transmission and processing after integration with electronic technology. field has been widely used. [0003] The servo proportional valve is the core control element in the hydraulic servo / proportional control system. Among them, the electro-hydraulic servo proportional flow valve can realize a constant pressure difference between the inlet and outlet and is not affected by load fluctuations. The opening of the valve port is related, so that the proportional control of the flow rate can be realized without being affected by the fluctuation of the load ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 熊熙程
Owner HANGZHOU REBOTECH
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