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A plunger cylinder utilizing gap sealing

A technology of plunger cylinder and clearance, applied in the field of hydraulic cylinder, can solve the problems of reduced reliability of seals and systems, and achieve the effects of improving running stability, reducing processing cost and increasing guide length.

Active Publication Date: 2016-03-02
XCMG HYDRAULICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the conventional plunger cylinder structure, in order to realize signal detection, it is necessary to change the structure and add seals to realize the connection between the high-pressure chamber and the signal outlet. In this way, the seal must pass through the oil hole continuously, and the reliability of the seal and the system will be greatly reduced. Greatly reduced

Method used

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  • A plunger cylinder utilizing gap sealing
  • A plunger cylinder utilizing gap sealing
  • A plunger cylinder utilizing gap sealing

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Embodiment Construction

[0027] The following is a specific embodiment of the present invention, and the present invention will be further described in conjunction with the accompanying drawings.

[0028] Such as figure 1 with figure 2 As shown, a plunger cylinder utilizing gap sealing includes a cylinder 2, a piston rod 5 and a gland 1; a guide sleeve 3 is provided on the inner cylindrical surface of the left end of the cylinder 2, and the right end of the gland 1 compresses the guide sleeve 3 , so that the guide sleeve 3 is fixed on the inner cylindrical surface of the cylinder barrel 2; a pressure signal port 21 communicating with the inside and outside of the cylinder barrel 2 is opened on the cylindrical surface of the cylinder barrel 2, and a pressure signal port 21 communicating with the pressure signal port 21 is opened on the guide sleeve 3 Oil passage hole I31, on the piston rod 5, there is an oil inlet 51 connecting the high-pressure chamber of the cylinder barrel 2 and the oil passage ho...

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Abstract

The invention discloses a clearance seal plunger type cylinder and belongs to the technical field of hydraulic cylinders. The clearance seal plunger type cylinder comprises a cylinder barrel, a piston rod and a gland; a guide sleeve is fixed on the inner cylindrical surface of the cylinder barrel; a copper-base anti-abrasion oil-free bushing is mounted between the piston rod and the guide sleeve; an oil passage for communicating the outer side of the cylinder barrel with the high-pressure cavity of the cylinder barrel when the piston rod finishes traveling is opened in the plunger type cylinder, when the piston rod of the plunger type cylinder finishes traveling, the oil passage can output pressure oil and send a pressure signal to realize the logic control for a hydraulic system; a very small clearance is formed between the relatively moving surfaces of the copper-base anti-abrasion oil-free bushing and the piston rod to form clearance seal.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a plunger cylinder utilizing gap sealing. Background technique [0002] For the conventional plunger cylinder structure, in order to realize signal detection, it is necessary to change the structure and add seals to realize the connection between the high-pressure chamber and the signal outlet. In this way, the seal must pass through the oil hole continuously, and the reliability of the seal and the system will be greatly reduced. Greatly reduced. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a plunger cylinder that utilizes gap seals. After the plunger cylinder reaches the stroke, it can send a pressure signal to stop the hydraulic system that cooperates with the plunger cylinder from inputting hydraulic oil, so that the plunger cylinder The movement of the plug cylinder is stopped, and the pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/14F15B15/20F16J9/26
Inventor 张伟伟刘朋郭彦斌耿艳钞
Owner XCMG HYDRAULICS CO LTD
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