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Directly operated type proportional overflow valve

A proportional relief valve, direct-acting technology, used in fluid pressure actuation devices, servo motor components, mechanical equipment, etc., can solve vibration and impact, affect the accuracy of output oil, reduce the service life of proportional relief valve, etc. problems, to improve accuracy, reduce vibration and shock

Inactive Publication Date: 2015-04-08
SUZHOU FURUN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing direct-acting proportional relief valve consists of two parts: a proportional electromagnet and a direct-acting relief valve, in which the poppet spool changes with the change of the input electrical signal parameters, resulting in a constant gap between the poppet spool and the valve seat. Vibration and impact not only affect the accuracy of the output oil, but also reduce the service life of the proportional relief valve

Method used

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  • Directly operated type proportional overflow valve

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Effect test

Embodiment approach

[0018] The first type: the buffer device is a buffer spring 8 that is arranged on the valve seat 9 and can be inserted into the cone valve core 7, such as figure 1 shown in .

[0019] The second type: the buffer device is a cylindrical rubber ring arranged on the valve seat 9 .

[0020] The third type: the buffer device is a buffer layer arranged on the cone valve core 7 . Can be a rubber layer or a silicone layer.

[0021] When the coil 4 is energized to generate suction, the push rod 5 pushes the spring 6 so that the cone valve core 7 changes proportionally with the change of the input electrical signal parameter (current). When the hydraulic pressure on the bottom surface of the cone valve core 7 is greater than the electromagnetic suction force, the cone valve core 7 The spool 7 is opened, the pressure oil overflows back to the flow tank, and the magnitude of the control current is continuously changed to continuously control the working pressure of the overflow valve pr...

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Abstract

The invention discloses a directly operated type proportional overflow valve. The directly operated type proportional overflow valve comprises a valve body, wherein an oil return opening and an oil inlet are formed in the valve body; the directly operated type proportional overflow valve is characterized in that a valve seat and a movable iron core are respectively arranged on the two sides of a cavity of the valve body; the movable iron core is connected with a push rod; the push rod is connected with a conical valve element through a spring; a coil is arranged on the outer side of the movable iron core; a damping device for reducing vibration and impact between the conical valve element and the valve seat is arranged between the conical valve element and the valve seat; one side of the valve seat is communicated with the oil inlet; one side of the push rod is communicated with the oil return opening. The directly operated type proportional overflow valve is formed by improving the structure of the existing directly operated type proportional overflow valve, so that the vibration and the impact between the conical valve element and the valve seat can be reduced, the precision of outputting oil liquid can be improved, and the service life of the proportional overflow valve can be prolonged.

Description

technical field [0001] The invention relates to a direct-acting proportional overflow valve. Background technique [0002] The proportional relief valve is a hydraulic control valve that can make the parameter (pressure) of the output oil change proportionally with the change of the input electrical signal parameter (current or voltage). These valves work in conjunction with an electronic amplifier that supplies the appropriate drive current to the proportional valve to calibrate the valve adjustment to correspond to the input signal to the amplifier. [0003] The existing direct-acting proportional relief valve consists of two parts: a proportional electromagnet and a direct-acting relief valve, in which the poppet spool changes with the change of the input electrical signal parameters, resulting in a constant gap between the poppet spool and the valve seat. Vibration and impact not only affect the accuracy of the output oil, but also reduce the service life of the proport...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 张国红
Owner SUZHOU FURUN MACHINERY