CN218294439U

CN218294439U - Guide sealing device for piston rod

Info

Publication number: CN218294439U
Application number: CN202221026380.2U
Authority: CN
Inventors: 夏利民; 曼弗雷德; 徐亭; 陈顺; 董兴凯
Original assignee: Suzhou Puli Sealing Technology Co ltd
Current assignee: Suzhou Puli Sealing Technology Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2023-01-13
Anticipated expiration: 2032-04-28

Abstract

The utility model relates to a piston rod sealing technique field specifically is a piston rod is with direction sealing device, including hydro-cylinder, piston, movable rod, end cover, first dead slot, first expansion ring, second expansion ring and second dead slot, hydro-cylinder one end is provided with the end cover, the inside slidable mounting of hydro-cylinder has the piston, a piston side surface is provided with the movable rod, first dead slot has all been seted up to piston both sides inside, first dead slot edge all imbeds and installs first expansion ring, first dead slot has seted up first through-hole from one side inner wall mutually, the inside second dead slot of having seted up of end cover, second expansion ring is installed in the embedding of second dead slot edge, the second through-hole has been seted up to second dead slot one side inner wall. The utility model discloses at inside first expansion ring and the second expansion ring that is linked together with the hydro-cylinder that sets up of piston and end cover respectively, can increase piston and the inside sealed effect of end cover when hydraulic oil pump goes into the hydro-cylinder.

Description

Guide sealing device for piston rod

Technical Field

The utility model relates to a piston rod sealing technique field, concretely relates to piston rod is with direction sealing device.

Background

The piston rod is a connecting component for supporting the piston to do work, most of the piston rod is applied to an oil cylinder and an air cylinder movement executing component, and the piston rod is a movement component with frequent movement and high technical requirements.

Through massive search, the prior art is found, and the publication number is as follows: CN201093063Y, a piston rod seal for hydraulic reciprocating is disclosed. The problems of structural design, sealing material complementarity, high pressure resistance, short service life, liquid leakage and the like of the piston rod sealing element in the prior art are solved. A flange is arranged on the inner side and the outer side of the piston rod sealing element in the circumferential direction, a check ring with a rectangular cross section is embedded into the upper side of the inner circular surface on one side in the axial direction, and an O-shaped sealing ring is arranged in the middle of the other side in the axial direction. The utility model discloses following beneficial effect has: the novel pressure relief type plastic pipe adopts unique sealing materials and geometric shapes, and has the advantages of compact structure, overall stability, wear resistance, good sealing performance, low friction, excellent pressure relief resistance, extrusion resistance and wear resistance. The heavy-duty bidirectional piston sealing ring is widely applied under a high-pressure working condition, is particularly suitable for high pressure, and is mainly used in the mine industry.

The existing piston rod is usually involved in the sealing between the piston and the inner wall of the oil cylinder and between the piston rod and one end of the oil cylinder, the sealing effect of the two positions is particularly important, the moving effect of the piston and the driving force for affecting the movement of the piston rod can be affected, the sealing is usually performed by adopting a rubber ring mode, but after the sealing ring is used for a long time, the sealing ring made of a rubber material can be aged, the sealing ring is easy to crack after the sealing ring is aged, and the sealing effect of the sealing ring can be greatly affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a piston rod is with direction sealing device has solved above technical problem.

The utility model provides an above-mentioned technical problem's scheme as follows: the utility model provides a piston rod is with direction sealing device, includes hydro-cylinder, piston, movable rod, end cover, first dead slot, first expansion ring, second expansion ring and second dead slot, hydro-cylinder one end is provided with the end cover, the inside slidable mounting of hydro-cylinder has the piston, piston side surface is provided with and runs through the movable rod of end cover, first dead slot has all been seted up to piston both sides inside, first dead slot edge all imbeds and installs and runs through the first expansion ring of piston outer wall, first dead slot has seted up from one side inner wall back and has run through the first through-hole of piston both sides outer wall, the inside second dead slot that has seted up of end cover, second dead slot edge imbeds and installs and runs through the second expansion ring of end cover inner wall, second dead slot one side inner wall has seted up and has run through the second through-hole of end cover one side inner wall.

The utility model has the advantages that: the utility model discloses in the use, the inside hydraulic oil that lets in of hydro-cylinder, hydraulic oil can get into in first dead slot and the second dead slot through first through-hole and second through-hole respectively, make the pressure in first dead slot and the second dead slot increase, hydraulic oil accessible pressure extrusion recess inner wall, make first expansion ring and second expansion ring produce the expansion, can effectively improve the leakproofness between piston and hydro-cylinder inner wall and end cover and the movable rod, traditional sealing method compares, possess better sealed effect, effectively avoided the long-time back of using of hydro-cylinder, sealed measure is ageing and cause the problem that hydraulic oil was revealed, the in-service use effect is better.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, a first oil filling pipe and a second oil filling pipe are symmetrically arranged at two ends of the upper surface of the oil cylinder.

The beneficial effect of adopting the further scheme is that: the first oil injection pipe and the second oil injection pipe can respectively inject hydraulic oil into the two ends of the oil cylinder, so that the piston is driven to move in the oil cylinder, and the movable rod is driven to stretch.

Further, a first sealing ring positioned between the first expansion rings is embedded and installed on the surface of the piston.

The beneficial effect of adopting the further scheme is that: first sealing washer can carry out basic seal between piston and the hydro-cylinder inner wall for first expansion ring carries out inseparabler sealed effect.

Further, the second sealing washer that is installed with the embedding of end cover one end inner wall with the movable rod surface is laminated mutually.

The beneficial effect of adopting the further scheme is that: the second sealing ring can carry out foundation seal between end cover and the movable rod, also can reduce external greasy dirt and get into between end cover and the movable rod and influence the removal flexibility of movable rod.

Further, the second through hole faces the piston side.

The beneficial effect of adopting the further scheme is that: the second through hole can get into the second dead slot at the hydraulic oil in space between piston and the end cover, realizes expanding the second expansion ring.

Furthermore, the inner walls of the first expansion ring and the second expansion ring are provided with grooves.

The beneficial effect of adopting the further scheme is that: the groove can facilitate the expansion of the first and second expansion rings, thereby improving the sealing effect.

Further, the outer wall of the first expansion ring is attached to the inner wall of the oil cylinder, and the inner wall of the second expansion ring is attached to the outer wall of the movable rod.

The beneficial effect of adopting the further scheme is that: first expansion ring outer wall and the laminating of hydro-cylinder inner wall can play and carry out the basis between piston and the hydro-cylinder inner wall and seal, and first expansion ring receives hydraulic oil extrusion back, increases the outer wall diameter of first expansion ring, can improve the sealed effect between piston and the hydro-cylinder to second expansion ring receives hydraulic oil extrusion back, can improve the leakproofness between end cover and the movable rod.

Furthermore, the movable rod deviates from one end of the piston and is welded with a connecting block.

The beneficial effect of adopting the further scheme is that: the connecting block can be connected with external equipment, so that the movable rod drives the external equipment to perform reciprocating motion.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural diagram of a main cross-sectional view of an oil cylinder of a guide sealing device for a piston rod according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a main cross-sectional structure of a piston of a guide sealing device for a piston rod according to an embodiment of the present invention;

fig. 3 is a schematic side view of a piston of a guiding and sealing device for a piston rod according to an embodiment of the present invention;

fig. 4 is a schematic partial sectional structural view of an end cover of a guide sealing device for a piston rod according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an oil cylinder; 2. a piston; 3. a movable rod; 4. an end cap; 5. connecting blocks; 6. a first filler pipe; 7. a second filler pipe; 8. a first empty slot; 9. a first seal ring; 10. a first expansion ring; 11. a first through hole; 12. a groove; 13. a second seal ring; 14. a second expansion ring; 15. a second through hole; 16. a second empty slot.

Detailed Description

The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-4, the examples given are intended to illustrate the present invention and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in figures 1 to 4, the utility model provides a guide sealing device for a piston rod, which comprises an oil cylinder 1, a piston 2, a movable rod 3, an end cover 4, a first empty groove 8, a first expansion ring 10, a second expansion ring 14 and a second empty groove 16, wherein one end of the oil cylinder 1 is provided with the end cover 4, the piston 2 is arranged in the oil cylinder 1 in a sliding way, the movable rod 3 penetrating the end cover 4 is arranged on one side surface of the piston 2, the first empty groove 8 is arranged in both sides of the piston 2, the first expansion ring 10 penetrating the outer wall of the piston 2 is embedded and installed at the edge of the first empty groove 8, the first through hole 11 penetrating the outer walls of both sides of the piston 2 is arranged on the inner wall of the first empty groove 8 opposite to the inner wall of one side, the second empty groove 16 is arranged in the end cover 4, the second expansion ring 14 penetrating the inner wall of the end cover 4 is embedded and installed at the edge of the second empty groove 16, second slot 16 one side inner wall is seted up and is run through second through-hole 15 of end cover 4 one side inner wall, in the use, 1 inside hydraulic oil that lets in of hydro-cylinder, hydraulic oil can get into first slot 8 and second slot 16 through first through-hole 11 and second through-hole 15 respectively, make the pressure in first slot 8 and the second slot 16 increase, hydraulic oil accessible pressure extrusion recess 12 inner wall, make first expansion ring 10 and second expansion ring 14 produce the expansion, can effectively improve the leakproofness between piston 2 and 1 inner wall of hydro-cylinder and end cover 4 and the movable rod 3, traditional sealing method compares, possess better sealed effect, effectively avoided the long-time back of using of hydro-cylinder 1, the ageing and problem that causes hydraulic oil to reveal, the actual use effect is better.

Preferably, a first oil filling pipe 6 and a second oil filling pipe 7 are symmetrically arranged at two ends of the upper surface of the oil cylinder 1, and the first oil filling pipe 6 and the second oil filling pipe 7 can respectively inject hydraulic oil into two ends of the oil cylinder 1, so that the piston 2 is driven to move in the oil cylinder 1 to drive the movable rod 3 to stretch.

Preferably, the first sealing ring 9 between the first expansion rings 10 is embedded in the surface of the piston 2, and the first sealing ring 9 can perform basic sealing between the piston 2 and the inner wall of the oil cylinder 1, so that the first expansion rings 10 perform a tighter sealing effect.

Preferably, the second sealing washer 13 of laminating mutually with the movable rod 3 surface is installed in the embedding of 4 one ends inner wall of end cover, and second sealing washer 13 can carry out the basis between end cover 4 and the movable rod 3 and seal, also can reduce external greasy dirt and get into between end cover 4 and the movable rod 3 and influence the removal flexibility of movable rod 3.

Preferably, the second through hole 15 faces the side of the piston 2, and the second through hole 15 can allow hydraulic oil in the space between the piston 2 and the end cover 4 to enter the second empty groove 16 to expand the second expansion ring 14.

Preferably, the inner walls of the first expansion ring 10 and the second expansion ring 14 are both provided with a groove 12, and the groove 12 can facilitate the expansion of the first expansion ring 10 and the second expansion ring 14, so as to improve the sealing effect.

Preferably, the outer wall of first expansion ring 10 is laminated with 1 inner wall of hydro-cylinder mutually, the 14 inner walls of second expansion ring are laminated with 3 outer walls of movable rod mutually, the laminating of 10 outer walls of first expansion ring and 1 inner wall of hydro-cylinder can play and carry out the basis sealed between 1 inner wall of piston 2 and hydro-cylinder, first expansion ring 10 receives hydraulic oil extrusion back, increase the outer wall diameter of first expansion ring 10, can improve the sealed effect between piston 2 and hydro-cylinder 1, and second expansion ring 14 receives hydraulic oil extrusion back, can improve the leakproofness between end cover 4 and the movable rod 3.

Preferably, the movable rod 3 deviates from the end welding of the piston 2 and is provided with a connecting block 5, and the connecting block 5 can be connected with external equipment, so that the movable rod 3 drives the external equipment to perform reciprocating motion.

The utility model discloses a concrete theory of operation and application method do: in the use, 1 inside hydraulic oil that lets in of hydro-cylinder, hydraulic oil can get into first dead slot 8 and second dead slot 16 through first through-hole 11 and second through-hole 15 respectively, make the pressure in first dead slot 8 and the second dead slot 16 increase, hydraulic oil accessible pressure extrusion recess 12 inner wall, make first expansion ring 10 and second expansion ring 14 produce the expansion, can effectively improve the leakproofness between

piston

2 and 1 inner wall of hydro-cylinder and end cover 4 and the movable rod 3, compare traditional sealed mode, possess better sealed effect, effectively avoided the long-time back of using of hydro-cylinder 1, sealed measure is ageing and causes the problem that hydraulic oil revealed, the in-service use effect is better.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; all the persons skilled in the art can smoothly implement the present invention as shown in the attached drawings and described above; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a piston rod is with direction sealing device which characterized in that: including hydro-cylinder (1), piston (2), movable rod (3), end cover (4), first dead slot (8), first expansion ring (10), second expansion ring (14) and second dead slot (16), hydro-cylinder (1) one end is provided with end cover (4), hydro-cylinder (1) inside slidable mounting has piston (2), piston (2) side surface is provided with runs through movable rod (3) of end cover (4), first dead slot (8) have all been seted up to piston (2) both sides inside, all the embedding of first dead slot (8) edge is installed and is run through first expansion ring (10) of piston (2) outer wall, first dead slot (8) have seted up from one side inner wall back and have run through first through-hole (11) of piston (2) both sides outer wall, second dead slot (16) have been seted up to end cover (4) inside, second dead slot (16) edge embedding is installed and is run through second expansion ring (14) of end cover (4) inner wall, second dead slot (16) inner wall (15) have been seted up to one side inner wall.

2. The guide seal device for a piston rod as set forth in claim 1, wherein: and a first oil filling pipe (6) and a second oil filling pipe (7) are symmetrically arranged at two ends of the upper surface of the oil cylinder (1).

3. The guide seal for a piston rod of claim 1, wherein: and a first sealing ring (9) positioned between the first expansion rings (10) is embedded and mounted on the surface of the piston (2).

4. The guide seal device for a piston rod as set forth in claim 1, wherein: and a second sealing ring (13) which is attached to the surface of the movable rod (3) is embedded into the inner wall of one end of the end cover (4).

5. The guide seal device for a piston rod as set forth in claim 1, wherein: the second through hole (15) faces the side of the piston (2).

6. The guide seal device for a piston rod as set forth in claim 1, wherein: the inner walls of the first expansion ring (10) and the second expansion ring (14) are provided with grooves (12).

7. The guide seal device for a piston rod as set forth in claim 1, wherein: the outer wall of the first expansion ring (10) is attached to the inner wall of the oil cylinder (1), and the inner wall of the second expansion ring (14) is attached to the outer wall of the movable rod (3).

8. The guide seal device for a piston rod as set forth in claim 1, wherein: the movable rod (3) deviates from one end of the piston (2) and is welded with a connecting block (5).