Hydraulic cylinder with sealing follow-up device

A technology of follower device and hydraulic cylinder, applied in the field of hydraulic cylinder, can solve the problems of poor continuous working ability, low working pressure and short life, and achieve the effect of good sealing effect, increased pressure and enhanced sealing ability

Active Publication Date: 2015-01-07
TIANJIN HEAVY EQUIP ENG RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known ultra-high pressure hydraulic cylinders are designed based on general design methods, with low working pressure (general working pressure does not exceed 70MPa, a few reach 200MPa), short life, poor continuous working ability, and serious leakage after working for a long time

Method used

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  • Hydraulic cylinder with sealing follow-up device
  • Hydraulic cylinder with sealing follow-up device
  • Hydraulic cylinder with sealing follow-up device

Examples

Experimental program
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Embodiment Construction

[0023] exist figure 1 - figure 2 In the shown embodiment, the piston guide ring 8 is installed in the piston annular groove 23 on the piston 1, the sealing follower ring 11 is installed on the rodless side of the piston 1, fixed with a snap ring 12, and the frustum of a cone on the sealing follower ring 11 24 and the outer conical surface of the piston 1 form a sealing follower ring inner pressure oil chamber 19, and form a sealing pressure cone angle 28, the sealing pressure cone angle 28 is less than 90 degrees, and the seal will be pressed into the pressure cone angle when it is under pressure Inside, the positive pressure bearing area will decrease to protect the seal, because of the existence of the pressure cone angle, the side pressure will increase, making the sealing effect of the seal better. At the same time, the design of the pressure cone angle will cause the seal to be in the alternating process of forward compression and reverse compression when pressurizing a...

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Abstract

A hydraulic cylinder with a sealing follow-up device comprises a piston, a sealing follow-up ring, a clamp ring and a hydraulic cylinder. The sealing follow-up ring is fixed onto the piston by the clamp ring, a cone frustum hole with a seam allowance is arranged at one end of an inner hole of the sealing follow-up ring, a cylindrical hole with a spiral oil groove is disposed at the other end of the inner hole of the sealing follow-up ring, a sealing ring groove is arranged on an outer circle of the sealing follow-up ring, a plurality of sealing follow-up ring oil inlet holes are arranged on a flange on the side, which is opposite to the cone frustum hole, of the sealing ring groove, a sealing follow-up ring internal pressure oil cavity is formed between the cone frustum hole and an outer conical surface of a rodless side of the piston, the sealing ring follow-up internal pressure oil cavity is connected with an oil cavity of a rodless side of the hydraulic cylinder by the spiral oil groove, an L-shaped seal is mounted in the sealing ring groove is disposed on the outer circle of the sealing ring follow-up ring, and an L-shaped sealing inner O-shaped seal is mounted between an inner circle of the L-shaped seal and the sealing ring groove.

Description

technical field [0001] The invention relates to a hydraulic cylinder with a sealing follower, in particular to an ultra-high pressure hydraulic cylinder with a working pressure above 200 MPa, and belongs to the technical field of ultra-high pressure hydraulic cylinder design. Background technique [0002] At present, with the development of new technologies, the demand for ultra-high pressure hydraulic cylinders with high precision, long life and continuous operation is becoming more and more extensive. Known ultra-high pressure hydraulic cylinders are designed based on general design methods, with low working pressure (generally no more than 70MPa, a few up to 200MPa), short service life, poor continuous working ability, and serious leakage after working for a long time. Contents of the invention [0003] In order to overcome the above-mentioned technical deficiencies, the present invention provides an ultra-high pressure hydraulic cylinder, which not only has a working p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/48
Inventor 李大海金海燕
Owner TIANJIN HEAVY EQUIP ENG RES
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