CN210440576U

CN210440576U - Sealing structure for hydraulic machinery

Info

Publication number: CN210440576U
Application number: CN201920900165.2U
Authority: CN
Inventors: 李广连
Original assignee: Dalian Jinma Boron Science And Technology Group Co ltd
Current assignee: China Boron Technology Dalian Co ltd
Priority date: 2019-06-16
Filing date: 2019-06-16
Publication date: 2020-05-01
Anticipated expiration: 2029-06-16

Abstract

The utility model discloses a seal structure for hydraulic machine, which comprises a housin, one side fixed mounting of casing has first dust ring, first dust ring has the dust ring through screwed connection, the inside slidable mounting of casing has the piston rod, the outside cover that the inside of casing is located the piston rod is equipped with the sealing washer, be equipped with the oil sump before sealing washer and the casing, the inside of sealing washer is equipped with first sealed checkpoint, the sealed checkpoint of second and the sealed checkpoint of third, first sealed checkpoint, the sealed checkpoint of second and the sealed checkpoint of third are arranged by the equidistance in proper order, one side fixed position that the inside of casing is located the sealing washer has the second dust ring. A seal structure for hydraulic machine, realized multistage sealed and multistage dirt-proof effect, can increase leakproofness and dirt resistance to can wipe adnexed dust on the piston rod when the piston rod is retrieved, avoid the dust to be brought into in the oil sump.

Description

Sealing structure for hydraulic machinery

Technical Field

The utility model relates to a seal structure field, in particular to seal structure for hydraulic pressure machinery.

Background

The sealing structure for the hydraulic machinery is used for the hydraulic machinery, and the hydraulic machinery uses hydraulic oil to push the piston rod to move, so that the hydraulic oil can generate better pushing force only by ensuring that the hydraulic oil cannot leak, and the sealing effect is greatly required; the existing sealing structure for the hydraulic machinery only has one sealing barrier, the sealing effect is poor, the dustproof effect is poor, the function of cleaning dust is not achieved, a piston rod needs to move back and forth, the dust can be attached to the piston rod when the piston rod is in contact with air, the dust is brought into an oil bin through the piston rod, oil sludge is generated after the dust is mixed with hydraulic oil in the oil bin, and the service life of the hydraulic machinery is easily influenced.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a sealing structure for hydraulic machine, which can effectively solve the problems of poor sealing effect, poor dust-proof effect and no dust-removing function in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a sealing structure for hydraulic machinery comprises a shell, a first dustproof ring is fixedly arranged on one side of the shell, the first dust ring is connected with a dust ring through a screw, a piston rod is arranged in the shell in a sliding way, a sealing ring is sleeved outside the piston rod in the shell, an oil bin is arranged in front of the sealing ring and the shell, a first sealing barrier, a second sealing barrier and a third sealing barrier are arranged in the sealing ring, the first sealing checkpoint, the second sealing checkpoint and the third sealing checkpoint are arranged in sequence at equal intervals, a second dustproof ring is fixedly arranged at one side of the sealing ring in the shell, the inside fixed mounting of first sealed checkpoint has first check valve, the inside fixed mounting of the sealed checkpoint of second has the second check valve, the inside fixed mounting of the sealed checkpoint of third has the third check valve.

Preferably, one end of the first check valve is communicated to the first sealing gate, the other end of the first check valve is fixedly provided with a first connecting pipe, the first connecting pipe is communicated to the oil bin, one end of the second check valve is communicated to the second sealing gate, the other end of the second check valve is fixedly provided with a second connecting pipe, the second connecting pipe is communicated to the oil bin, one end of the third check valve is communicated to the third sealing gate, the other end of the third check valve is fixedly provided with a third connecting pipe, and the third connecting pipe is communicated to the oil bin.

Preferably, the dust cleaning ring consists of an outer ring and fiber cloth, and a bonding meter is arranged between the outer ring and the fiber cloth.

Preferably, the sealing ring and the second dust ring are fixedly connected with the shell through an adhesion meter.

Preferably, the first dustproof ring is composed of a first dustproof convex block and a second dustproof convex block, and a cavity is arranged between the first dustproof convex block and the second dustproof convex block.

Compared with the prior art, the utility model discloses following beneficial effect has: in the utility model, the multistage sealing effect can be realized through the first sealing barrier, the second sealing barrier and the third sealing barrier, when in use, the leakage condition of a certain barrier can be generated, the sealing effect of other barriers can not be influenced, the hydraulic machine can be normally used, moreover, a check valve is arranged in each sealing barrier, when hydraulic oil enters into the barriers, the hydraulic oil can flow back into an oil bin through the check valve, the pressure of the sealing barriers can not be too high, and other sealing barriers can not be influenced, through the arranged first dust ring, the structure of the first dust ring is similar to that of the sealing ring, two dust barriers are arranged through the first dust lug and the second dust lug, the multistage dustproof effect can be realized, the dustproof effect is better, through the arranged dust ring, the inside of the dust ring is provided with fiber cloth or cotton cloth, and the cleaning capability is better, when the piston rod is recovered, the dust ring can wipe off dust attached to the piston rod, the dust is prevented from being brought into the oil bin, the dust ring is fixed on the first dust ring through screws, and people can conveniently detach and clean the dust ring.

Drawings

Fig. 1 is a schematic view of an overall structure of a sealing structure for a hydraulic machine according to the present invention;

fig. 2 is a schematic view of an internal structure of a sealing structure for a hydraulic machine according to the present invention;

fig. 3 is an enlarged view of a in fig. 1 of a sealing structure for a hydraulic machine according to the present invention;

fig. 4 is the internal structure schematic diagram of the first dust ring of the sealing structure for hydraulic machinery of the present invention.

In the figure: 1. a housing; 2. a first dust ring; 3. a dust cleaning ring; 4. a screw; 5. a piston rod; 6. a seal ring; 7. an oil bin; 8. a first sealing barrier; 9. a second sealing barrier; 10. a third sealing barrier; 11. a second dust ring; 12. a first check valve; 13. a second check valve; 14. a third check valve; 15. a first connecting pipe; 16. a second connecting pipe; 17. a third connecting pipe; 18. a first dust-proof projection; 19. a second dust-proof bump; 20. a cavity.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, a seal structure for hydraulic machinery, includes casing 1, one side fixed mounting of casing 1 has first dust ring 2, first dust ring 2 is connected with dust ring 3 through screw 4, the inside slidable mounting of casing 1 has piston rod 5, the outside cover that the inside of casing 1 is located piston rod 5 is equipped with sealing washer 6, sealing washer 6 is equipped with oil bin 7 before with casing 1, the inside of sealing washer 6 is equipped with first sealed checkpoint 8, second sealed checkpoint 9 and third sealed checkpoint 10, first sealed checkpoint 8, second sealed checkpoint 9 and third sealed checkpoint 10 arrange in proper order equidistance, one side fixed mounting that the inside of casing 1 is located sealing washer 6 has second dust ring 11, the inside fixed mounting of first sealed checkpoint 8 has first check valve 12, the inside fixed mounting of second sealed checkpoint 9 has second check valve 13, a third check valve 14 is fixedly installed inside the third sealing barrier 10;

one end of the first check valve 12 is communicated to a first sealing gate 8, the other end of the first check valve 12 is fixedly provided with a first connecting pipe 15, the first connecting pipe 15 is communicated to the oil bin 7, one end of the second check valve 13 is communicated to a second sealing gate 9, the other end of the second check valve 13 is fixedly provided with a second connecting pipe 16, the second connecting pipe 16 is communicated to the oil bin 7, one end of the third check valve 14 is communicated to a third sealing gate 10, the other end of the third check valve 14 is fixedly provided with a third connecting pipe 17, and the third connecting pipe 17 is communicated to the oil bin 7; the dust wiping ring 3 consists of an outer ring and fiber cloth, an adhesion meter is arranged between the outer ring and the fiber cloth, the fiber cloth can play a role in wiping dust, the outer ring can play a role in fixing the fiber cloth, and the adhesion meter can play a role in fixed connection; the sealing ring 6 and the second dust ring 11 are fixedly connected with the shell 1 through an adhesion meter; the first dustproof ring 2 is composed of a first dustproof convex block 18 and a second dustproof convex block 19, and a cavity 20 is arranged between the first dustproof convex block 18 and the second dustproof convex block 19.

It should be noted that, the utility model relates to a sealing structure for hydraulic machine, when using, the first sealing level 8, the second sealing level 9 and the third sealing level 10 of the sealing ring 6, the multi-stage sealing effect is realized, when using, if a certain level has a leakage situation, the sealing effect of other levels will not be affected, hydraulic machine can also be used normally, and each of the first sealing level 8, the second sealing level 9 and the third sealing level 10 is respectively provided with the first check valve 12, the second check valve 13 and the third check valve 14, when a certain level enters hydraulic oil due to leakage, the hydraulic oil can flow back into the oil bin 7 from the first connecting pipe 15, the second connecting pipe 16 or the third connecting pipe 17 through the check valves, which will not cause the sealing level pressure to be too large and affect other sealing levels, and the first sealing ring 2 adopts the same sealing structure, first dustproof lug 18 and second dustproof lug 19 have formed the dustproof effect of two-stage, greatly increased dustproof effect, secondly when the piston rod 5 activity of making a round trip, the dust ring 3 can be wiped away the dust in the adnexed air of piston rod 5, has avoided the dust to be brought into in the oil sump 7 by piston rod 5 to the dust ring 3 is fixed on first dustproof ring 2 through screw 4, and it is also very convenient to dismantle the washing.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A kind of hydraulic machinery uses the hermetically-sealed construction, characterized by that: including casing (1), one side fixed mounting of casing (1) has first dust ring (2), first dust ring (2) are connected with dust ring (3) through screw (4), the inside slidable mounting of casing (1) has piston rod (5), the outside cover that the inside of casing (1) is located piston rod (5) is equipped with sealing washer (6), sealing washer (6) and casing (1) are equipped with oil bin (7) before, the inside of sealing washer (6) is equipped with first sealed customs (8), the sealed customs (9) of second and the sealed customs (10) of third, first sealed customs (8), the sealed customs (9) of second and the sealed customs (10) of third are arranged in proper order equidistance, one side position fixed mounting that the inside of casing (1) is located sealing washer (6) has second dust ring (11), the inside fixed mounting of first sealed customs (8) has first check valve (12), and a second check valve (13) is fixedly arranged in the second sealing barrier (9), and a third check valve (14) is fixedly arranged in the third sealing barrier (10).

2. A sealing structure for a hydraulic machine according to claim 1, wherein: the one end of first check valve (12) communicates to first sealed checkpoint (8), the other end fixed mounting of first check valve (12) has first connecting pipe (15), first connecting pipe (15) communicate to oil bin (7), the one end of second check valve (13) communicates to second sealed checkpoint (9), the other end fixed mounting of second check valve (13) has second connecting pipe (16), second connecting pipe (16) communicate to oil bin (7), the one end of third check valve (14) communicates to third sealed checkpoint (10), the other end fixed mounting of third check valve (14) has third connecting pipe (17), third connecting pipe (17) communicate to oil bin (7).

3. A sealing structure for a hydraulic machine according to claim 1, wherein: the dust cleaning ring (3) is composed of an outer ring and fiber cloth, and a bonding meter is arranged between the outer ring and the fiber cloth.

4. A sealing structure for a hydraulic machine according to claim 1, wherein: and the sealing ring (6), the second dust ring (11) and the shell (1) are fixedly connected through an adhesion meter.

5. A sealing structure for a hydraulic machine according to claim 1, wherein: the first dustproof ring (2) is composed of a first dustproof convex block (18) and a second dustproof convex block (19), and a cavity (20) is arranged between the first dustproof convex block (18) and the second dustproof convex block (19).