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A cartridge valve opening limit adjustment device

A technology of adjusting device and opening limit, applied in the field of hydraulic valve, can solve the problems of incomplete balance of hydraulic pressure, easy wear and lock of threaded transmission pair, etc.

Active Publication Date: 2017-01-18
HANGZHOU FINE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that only a part of the limit ejector rod is submerged in the hydraulic chamber connected to the control chamber of the cartridge valve core, and the hydraulic pressure received is not completely balanced, so when the oil pressure in the control chamber of the cartridge valve is relatively high When the ejector pin bears a large axial force, the axial force directly acts on the thread pair for transmission, resulting in an increase in the rotation resistance of the limit ejector pin, and the threaded drive pair is easy to wear and lock, which is not suitable for use. Motor drive, unable to realize automatic control

Method used

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  • A cartridge valve opening limit adjustment device
  • A cartridge valve opening limit adjustment device

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the present invention is further analyzed.

[0019] Such as figure 1 , figure 2 As shown, the device of the present invention includes a housing, a driving mechanism 1, a main shaft 2, a limit ejector rod 3, a valve core 4, and a valve sleeve 5;

[0020] The housing of the device of the present invention is composed of the mounting bracket 6, the bell housing 7 and the bottom plate 8, which are fixedly connected from top to bottom; the main shaft 2, the limit ejector rod 3, and the output shaft of the driving mechanism 1 are sequentially arranged in the housing from top to bottom. It is fixedly connected with one end of the main shaft 2, and the other end of the main shaft 2 is connected with one end of the limit ejector rod 3 through a threaded transmission pair, and the other end of the limit ejector rod 3 is inserted into the control chamber 9 of the spool 4 for limiting the Maximum stroke relative to valve sleeve 5....

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Abstract

The invention relates to a limiting adjusting device for the opening of a cartridge valve. The limiting adjusting device for the opening of the cartridge valve comprises a shell, a driving mechanism, a main shaft, a limiting ejector rod, a valve plug and a valve sleeve, wherein the driving mechanism is fixedly connected with one end of the main shaft, the other end of the main shaft is connected with one end of the limiting ejector rod through a thread transmission pair, the other end of the limiting ejector rod is inserted into a control cavity of the valve plug, and a rotation stopping mechanism is arranged between the shell and the limiting ejector rod. Pilot hydraulic oil enters the control cavity of the valve plug through an oil circuit on the shell, the limiting ejector rod is completely immersed in the hydraulic oil in the control cavity of the cartridge valve, and the borne hydraulic pressure can automatically achieve the balance; all bearings and the thread transmission pair arranged between the main shaft and the limiting ejector rod are immersed in the oil, self lubrication is achieved, the service life of the components is prolonged, and adjusting accuracy of the components is improved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic valves, and relates to an opening limit adjustment device for a cartridge valve. Background technique [0002] The traditional cartridge valve stopper rod is directly threaded to the cartridge valve cover plate, and its position relative to the cartridge valve core is adjusted by rotating the stopper rod, thereby changing the maximum opening of the cartridge valve. The disadvantage of this method is that only a part of the limit ejector rod is submerged in the hydraulic chamber connected to the control chamber of the cartridge valve core, and the hydraulic pressure received is not completely balanced, so when the oil pressure in the control chamber of the cartridge valve is relatively high When the ejector pin bears a large axial force, the axial force directly acts on the thread pair for transmission, resulting in an increase in the rotation resistance of the limit ejector pin, and the threaded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K37/00
CPCF16K1/126F16K1/523
Inventor 孔晓武
Owner HANGZHOU FINE TECH
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