CN213088375U

CN213088375U - Hydraulic oil cylinder capable of preventing low-speed crawling

Info

Publication number: CN213088375U
Application number: CN202021830107.6U
Authority: CN
Inventors: 孔思佳
Original assignee: Changzhou Haocheng Machinery Co ltd
Current assignee: Changzhou Haocheng Machinery Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-30
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a prevent hydraulic cylinder that low-speed crawled, including the hydro-cylinder pipe, the spiro union is located the intraductal piston of hydro-cylinder and piston rod in the rear end cap of the front end housing of hydro-cylinder pipe one end and the other end, piston rod one end and piston connection, the other end run through the front end housing and are connected with power device, install first Y type sealing washer and hole and use the steckel seal on the piston, install second Y type sealing washer and axle on the inside wall of front end housing and use the steckel seal, still be equipped with on the front end cap with the intraduct communicating oil inlet of hydro-cylinder. The utility model has the advantages of through selecting suitable sealing washer, can enough guarantee the inside leakproofness of hydro-cylinder, produce noise and vibrations when avoiding piston rod and piston motion again, the quality of hydro-cylinder has obtained effective assurance.

Description

Hydraulic oil cylinder capable of preventing low-speed crawling

Technical Field

The utility model relates to a hydraulic cylinder technical field specifically is a prevent hydraulic cylinder of low-speed crawling.

Background

The hydraulic cylinder is a conversion device for converting hydraulic pressure into mechanical energy, the sealing of relative motion parts between a piston and the inner wall of the hydraulic cylinder and between a piston rod and a cylinder cover hole is a difficult point and a key point of the design of the hydraulic cylinder, and in actual production, the problems of internal leakage, creeping, grinding damage, poor pressure maintaining performance and the like are caused due to poor sealing of the hydraulic cylinder, so that the stability, the reliability and the service life of hydraulic equipment are seriously influenced. Therefore, the sealing problem of the hydraulic cylinder needs to be carefully analyzed and improved.

In the current market, sealing rings are adopted for sealing in order to ensure that the hydraulic cylinder is sealed, but the sealing effect is poor due to too few mounted sealing rings, leakage is generated, and the pressure maintaining performance of the oil cylinder is affected; the excessive quantity of the oil cylinder sealing rings can cause overlarge friction force between the oil cylinder sealing rings and the inner wall of the hydraulic cylinder and between the oil cylinder sealing rings and the piston rod; at low speeds, noise and vibration are generated. Therefore, in order to ensure the sealing performance and prevent the creeping, the selection, hardness and number of the sealing rings are considered comprehensively to solve the problem.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a prevent hydraulic cylinder that low-speed crawled, includes the hydro-cylinder pipe, spiro union in the front end housing of hydro-cylinder pipe one end and the rear end housing of the other end, locates the inside piston and the piston rod of hydro-cylinder pipe, piston rod one end and piston connection, still be equipped with the end cover hole on the front end cover, the piston rod other end passes the end cover jogged joint and has power device, install first Y type sealing washer and hole and use the steckel seal on the piston, install second Y type sealing washer and axle on the end cover hole lateral wall and use the steckel seal, still be equipped with on the front end cover with the inside communicating oil inlet of hydro-cylinder pipe.

Preferably, a muffler exhaust port is installed at the middle position of the rear end cover.

Preferably, the piston is further provided with a first guide strip, and the first guide strip is positioned between the first Y-shaped sealing ring and the bore Steve seal.

Preferably, the shaft end cover further comprises an end cover hole, a second guide belt is mounted on the side wall of the end cover hole, and the second guide belt is located at the bottom of the second Y-shaped sealing ring and the shaft stet seal.

Preferably, the front end cover is sleeved with a flange and connected through a bolt.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a for between piston and the hydro-cylinder inside pipe wall and all choose a Y type sealing washer and a steckel separately for use as the sealing member between piston rod and the cylinder cap hole, Y type sealing washer is made by butyl cyanide rubber, it is reliable to have a sealing performance, frictional resistance is little, steady and simple structure moves, the advantage of low price, steckel is formed by a rubber O type circle and the combination of polytetrafluoroethylene circle, O type circle is force application component, provide sufficient sealing force, and play the compensatory action to the polytetrafluoroethylene circle, steckel has frictional force low, no crawling, the starting force is little, high pressure resistant advantage. By selecting the combination of the Y-shaped sealing ring and the Stent seal, the gas leakage amount can be controlled to be in an excellent condition under the condition of low friction resistance, the sealing effect is ensured, large friction force cannot be generated, the oil cylinder can crawl, and the device also has the advantages of low price and enterprise cost saving.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a piston structure;

fig. 3 is a front end cap structure view.

In the figure: 1. a cylinder tube; 2. a front end cover; 3. a rear end cap; 4. a piston; 5. a piston rod; 6. an end cap aperture; 7. a first Y-shaped seal ring; 8. the hole is sealed with a stent; 9. a second Y-shaped seal ring; 10. the shaft is sealed with a stent; 11. an oil inlet; 12. a muffler exhaust port; 13. a first guide belt; 14. a second guide belt; 15. and (4) a flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a hydraulic cylinder for preventing low-speed crawling comprises a cylinder tube 1, a front end cover 2 screwed on one end of the cylinder tube 1, a rear end cover 3 screwed on the other end of the cylinder tube 1, a piston 4 and a piston rod 5 arranged inside the cylinder tube 1, one end of the piston rod 5 is connected with the piston 4, an end cover hole 6 is further formed in the front end cover 2, the other end of the piston rod 5 penetrates through the end cover hole 6 to be connected with a power device, a first Y-shaped sealing ring 7 and a hole-used stet seal 8 are installed on the piston 4, a second Y-shaped sealing ring 9 and a shaft-used stet seal 10 are installed on the side wall of the end cover hole 6, and the Y-shaped sealing ring 7 is attached to a coupling surface of a. In the absence of internal pressure, only a small contact pressure is generated by the deformation of the lip tip. In the case of sealing, at every point of contact with the sealing medium there is a normal pressure equal to the pressure of the medium, so that the bottom of the lip ring will be compressed axially, the lip will be compressed circumferentially, the contact with the sealing surface will be widened and the contact stress will increase. When the internal pressure rises again, the distribution form and the size of the contact pressure are further changed, the lip part is matched with the sealing surface more tightly, so the sealing performance is better, but only one Y-shaped sealing ring cannot completely ensure the air tightness in the cylinder body, and once gas leakage occurs, serious consequences can be caused, therefore, in order to ensure the sealing performance and avoid generating larger friction force, a corresponding stet seal is also added to each of the piston 4 and the piston rod 5, and the stet seal is formed by combining a rubber O-shaped ring and a polytetrafluoroethylene ring. The O-shaped ring is a force application element, provides enough sealing force, has a compensation effect on the polytetrafluoroethylene ring, is matched with the Y-shaped sealing ring, enables the leakage amount to be controlled to be in an excellent state even under the condition of low friction resistance of the whole sealing element, can almost reach the completely sealed state by matching with the Stent seal, and has low price and low cost. The front end cover 2 is further provided with an oil inlet 11 communicated with the interior of the oil cylinder pipe 1, a silencer exhaust port 12 is installed in the middle of the rear end cover 3, the silencer exhaust port 12 has the advantages of being convenient to install, good in noise elimination effect and long in service life, noise generated when the hydraulic oil cylinder works and exhausts can be eliminated, a first guide belt 13 is further installed on the piston 4, the first guide belt 13 is located between the first Y-shaped sealing ring 7 and the hole-used Stent seal 8, a second guide belt 14 is installed on the side wall of the end cover hole 6, the second guide belt 14 is located at the bottom of the second Y-shaped sealing ring 9 and the shaft-used Stent seal 10, the guide belts have guiding and sealing functions on the piston 4 and the piston rod 5, and the front end cover 2 is sleeved with a flange 15 and connected through bolts. Utility model through give between piston and the hydro-cylinder inside pipe wall and all choose a Y type sealing washer and a steckel separately for use between piston rod and the cylinder cap hole as the sealing member, both guaranteed sealed effect and can not produce great frictional force and make piston device move slowly yet.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent hydraulic cylinder of low-speed crawl which characterized in that: the oil cylinder pipe comprises an oil cylinder pipe (1), a front end cover (2) screwed to one end of the oil cylinder pipe (1) and a rear end cover (3) at the other end of the oil cylinder pipe, a piston (4) and a piston rod (5) are arranged inside the oil cylinder pipe (1), one end of the piston rod (5) is connected with the piston (4), the other end of the piston rod penetrates through the front end cover (2) to be connected with a power device, a first Y-shaped sealing ring (7) and a hole-used Stent seal (8) are installed on the piston (4), a second Y-shaped sealing ring (9) and a shaft-used Stent seal (10) are installed on the inner side wall of the front end cover (2), and an oil inlet (11) communicated with the inside of the oil cylinder pipe (1) is further.

2. The hydraulic cylinder of claim 1 for preventing low speed creep, wherein: and a silencer exhaust port (12) is arranged in the middle of the rear end cover (3).

3. The hydraulic cylinder of claim 1 for preventing low speed creep, wherein: and a first guide belt (13) is further installed on the piston (4), and the first guide belt (13) is positioned between the first Y-shaped sealing ring (7) and the Stent seal (8) for the hole.

4. The hydraulic cylinder of claim 1 for preventing low speed creep, wherein: still include end cover hole (6), install second guiding strip (14) on end cover hole (6) lateral wall, second guiding strip (14) are located the bottom of second Y type sealing washer (9) and axle with stet seal (10).

5. The hydraulic cylinder of claim 1 for preventing low speed creep, wherein: the front end cover (2) is sleeved with a flange (15) and connected through bolts.