CN217683234U - Oil seal with sticking reliability - Google Patents

Abstract

The utility model discloses an oil blanket with paste reliability relates to dynamic seal technical field. The oil seal comprises a framework, a lip piece and an adhesive layer. The framework comprises a horizontal section and a vertical section which surrounds the horizontal section and extends along the direction vertical to the horizontal section in the circumferential direction, and the horizontal section is provided with a shaft hole; the lip comprises an installation part and a sealing part, the installation part is fixedly arranged on one side of the horizontal section facing the vertical section, and the sealing part extends to the center of the shaft hole; paste the layer set up in the installation department with between the horizontal segment, paste the edge on layer and pass the installation department with follow between the vertical segment extends and forms the mistake proofing post. The oil seal can be used for detecting the sticking reliability under the condition of not damaging the lip, the cost is reduced, and the accuracy is high.

Description

Oil seal with sticking reliability

Technical Field

The utility model relates to a dynamic seal technical field especially relates to an oil blanket with paste reliability.

Background

The oil seal is a typical mechanical basic element, is widely applied to mechanical equipment, performs dynamic sealing on various rotating shafts, plays a role in preventing lubricating media of a mechanical device from leaking, and ensures the normal operation of the mechanical device.

The oil seal comprises a framework and a lip, rubber is arranged between the lip and the framework, the rubber and the lip are vulcanized to bond and fix the framework and the lip after the framework, the rubber and the lip are pressed tightly by a mold closing die of a vulcanization mold. The rubber filling condition between the lip and the oil seal framework directly determines the bonding firmness degree of the lip. And if the rubber is filled fully, the lip sheets are firmly bonded. However, the rubber is liable to move before vulcanization, and if the rubber is insufficiently filled or lacks, the lip adhesion strength is insufficient. Wherein, the rubber is most easy to move towards the center direction of the shaft hole, so that the rubber between the lip edge and the framework is not filled enough or is in short of rubber.

In order to confirm the filling state of the rubber of the rim-to-rim bonding surface, that is, the reliability of the adhesion of the rim, the detection was carried out only by a failure test. However, this method can only estimate the overall adhesion condition through several samples, which is costly and not accurate enough.

In view of the above problems, it is desirable to develop an oil seal with adhesion reliability to solve the problems of high cost and insufficient accuracy in detecting the adhesion reliability of a lip.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil blanket with paste reliability can paste the detection of reliability under the condition of not destroying the lip, reduce cost, and the rate of accuracy is high.

To achieve the purpose, the utility model adopts the following technical proposal:

an oil seal with adhesion reliability, comprising:

the framework comprises a horizontal section and a vertical section which surrounds the horizontal section and extends along the direction vertical to the horizontal section in the circumferential direction, and the horizontal section is provided with a shaft hole;

the lip comprises an installation part and a sealing part, the installation part is fixedly arranged on one side of the horizontal section facing the vertical section, and the sealing part extends to the center of the shaft hole;

paste the layer, paste the layer set up in the installation department with between the horizontal segment, the edge of pasting the layer passes the installation department with follow between the vertical segment extends and forms the mistake proofing post.

Preferably, the edge of pasting the layer is provided with a plurality ofly the mistake proofing post, and is a plurality of mistake proofing post is followed the circumference interval of installation department sets up.

Preferably, an included angle between connecting lines of circle centers of adjacent mistake proofing columns and the shaft hole is 45 degrees.

Preferably, the height of the mistake proofing column is 10-20mm.

Preferably, the width of the mistake proofing column is 8-13mm.

Preferably, the lip is integrally formed of PTFE.

Preferably, the sealing portion is inclined toward the center of the shaft hole in the extending direction of the vertical section.

Preferably, still include the dust lip, the dust lip is fixed set up in the horizontal segment, the dust lip towards the center extension in shaft hole.

Preferably, the dust lip is inclined toward the center of the shaft hole in a direction away from the seal portion.

Preferably, still include dustproof felt, dustproof felt fixed set up in the horizontal segment deviates from one side of vertical section.

The utility model has the advantages that:

the utility model provides an oil blanket with paste reliability. In this oil blanket, be provided with between the horizontal segment of skeleton and the installation department of lip and paste the layer, when pressurizeing skeleton and lip so that paste layer bonding fixed skeleton and lip, paste the layer and can flow in order to fill the clearance between the horizontal segment of skeleton and the installation department of lip. After the clearance between the horizontal segment of skeleton and the installation department of lip is filled up, paste the layer and can extend along vertical section along the clearance between vertical section and the installation department and form the mistake proofing post. The formation of the mistake proofing column shows that the filling condition of the area around the mistake proofing column between the horizontal section of the framework and the installation part of the lip is good, so that when the bonding reliability of the lip is detected, only the existence of the mistake proofing column needs to be observed.

The oil seal can be used for detecting the adhesion reliability under the condition of not damaging the lip, so that the cost is reduced, and the accuracy is high.

Drawings

Fig. 1 is a schematic structural diagram of an oil seal provided by the present invention;

fig. 2 isbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.

In the figure:

1. a framework; 2. a lip piece; 3. a pasting layer; 4. a dust lip; 5. a dust-proof felt;

11. a horizontal segment; 12. a vertical section; 21. an installation part; 22. a sealing part; 31. a mistake proofing column;

111. and the shaft hole.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 referred to must have a specific orientation, be constructed and operated in a specific orientation, 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. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first feature being in direct contact with the second feature, and may also include the recitation of the first feature being in contact with the second feature, but rather being in contact with the additional feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

The oil seal is a typical mechanical basic element, is widely applied to mechanical equipment, performs dynamic sealing on various rotating shafts, plays a role in preventing lubricating media of a mechanical device from leaking, and ensures the normal operation of the mechanical device.

The oil blanket includes skeleton 1 and lip 2, is provided with rubber between lip 2 and the skeleton 1, utilizes the vulcanization mould compound die to compress tightly skeleton 1, rubber and lip 2 back, vulcanizes rubber in order to bond fixed skeleton 1 and lip 2. The rubber filling condition between the lip 2 and the frame 1 directly determines the degree of adhesion firmness of the lip 2. However, the rubber is liable to play before vulcanization, and during vulcanization, the lip 2 pressing die continuously provides pressing force to the lip 2 so that the rubber will flow between the lip 2 and the carcass 1 to fill the gap. When the rubber is filled fully, the lip 2 is bonded firmly, and when the rubber is not filled enough or the rubber is not filled enough, the bonding strength of the lip 2 is not enough. Among them, the rubber is most likely to move toward the center of the shaft hole 111, so that the rubber between the edge of the lip 2 and the frame 1 is not sufficiently filled or is lacked, thereby affecting the bonding reliability.

In the prior art, in order to confirm the filling state of the rubber of the bonding surface of the lip 2 and the framework 1, namely the bonding reliability of the lip 2, the detection can be carried out only by a destructive experiment. This method can only estimate the overall adhesion condition by several samples, which is costly and not accurate enough.

In order to solve the above problem, the present embodiment provides an oil seal with adhesion reliability, which includes a framework 1, a lip 2, and an adhesion layer 3, as shown in fig. 1 and 2. Skeleton 1 includes horizontal segment 11 and surrounds vertical section 12 that 11 directions of horizontal segment 11 are followed to the circumference of horizontal segment 11 and are extended, and shaft hole 111 has been seted up to horizontal segment 11. The lip 2 includes an installation portion 21 and a sealing portion 22, the installation portion 21 is fixedly disposed on one side of the horizontal section 11 facing the vertical section 12, and the sealing portion 22 extends to the center of the shaft hole 111. Paste layer 3 and set up between installation department 21 and horizontal segment 11, the edge on pasting layer 3 passes between installation department 21 and the vertical segment 12 and extends along vertical segment 12 and forms mistake proofing post 31.

The vertical section 12 of the frame 1 is intended to be connected to a fixed structure of a mechanical device, the shaft passing through the shaft hole 111 and being in dynamic sealing connection with the sealing portion 22 of the lip 2. Specifically, the adhesive layer 3 is made of rubber. Before the vulcanization, place the living rubber strip between the horizontal segment 11 of skeleton 1 and the installation department 21 of lip 2, pressurize, vulcanize back to skeleton 1 and lip 2, the rubber can bond fixed skeleton 1 and lip 2, and in the vulcanization process, living rubber flows in order to fill the clearance between the horizontal segment 11 of skeleton 1 and the installation department 21 of lip 2.

When the gap between the horizontal section 11 of the frame 1 and the mounting portion 21 of the lip 2 is filled, the rubber flows and extends along the vertical section 12 along the gap between the vertical section 12 and the mounting portion 21 due to extrusion, and the error-proofing column 31 is formed. The formation of the error-proofing column 31 indicates that the area around the error-proofing column 31 between the horizontal section 11 of the frame 1 and the mounting portion 21 of the lip 2 is filled well, so that it is only necessary to observe whether the error-proofing column 31 is present or not when detecting the adhesion reliability of the lip 2.

The oil seal can be used for detecting the sticking reliability under the condition of not damaging the lip 2, the cost is reduced, and the accuracy is high.

It can be understood that the pressing die head of the lip 2 is attached to the vertical portion when pressing the mounting portion 21 of the lip 2, so as to ensure that no relative movement occurs between the structures of the oil seal under high pressure. In order to enable the rubber to penetrate through the lip 2 and be arranged between the lip 2 and the vertical section 12 of the framework 1 when being extruded in the vulcanization process, a cavity is formed in the side wall of the pressing die head of the lip 2, and the part, located at the cavity, of the mounting part 21 is in a virtual pressure state, so that the rubber can push the mounting part 21 at the position and slightly deform the mounting part, and then the rubber enters the cavity to form the error-proofing column 31.

Specifically, the circumferential edge of the mounting portion 21 is provided with an axially-through avoidance groove, and the rubber is extruded in the vulcanization process, so that the mistake proofing column 31 can be formed through the avoidance groove. The arrangement of the avoiding groove can avoid the deformation of the mounting part 21 due to the pushing of rubber, and the pasting effect is further improved.

Preferably, the edge of the adhesive layer 3 is provided with a plurality of error-proofing columns 31, and the error-proofing columns 31 are arranged at intervals along the circumferential direction of the mounting part 21. The formation of the error-proofing columns 31 can only indicate that the rubber is well filled at the positions near the error-proofing columns 31, and the plurality of error-proofing columns 31 can ensure that the rubber is well filled at a plurality of positions between the mounting part 21 and the horizontal section 11, thereby ensuring the reliability of the adhesion. Specifically, the included angle between the connecting lines of the adjacent mistake proofing columns 31 and the circle centers of the shaft holes 111 is 45 degrees, and the oil seals have eight mistake proofing columns 31 in total. Wherein, the quantity of mistake proofing post 31 can rationally set up according to the actual size of oil blanket.

Preferably, the height of the mistake-proofing columns 31 is 10-20mm. The filling condition of the rubber can be judged according to the height of the error-proof column 31, if the error-proof column 31 is higher, the filling is sufficient, and if the error-proof column 31 is lower, the filling is sufficient, but the possibility of lacking the rubber exists, and the raw rubber can be placed at a position where more rubber is placed, or the pressure of the compaction die head is adjusted. Here, the height of the error-proofing column 31 is the same as the depth of the cavity of the compression die, and the height thereof can be 11mm, 13mm, 15mm, 17mm and 19mm.

Preferably, the error-proofing columns 31 have a width of 8-13mm. If the mistake proofing post 31 is wide, the height of the mistake proofing post 31 is easily lowered, and an operator easily makes an erroneous judgment on the amount of rubber at the position. And the error-proofing column 31 is narrow, so that the error-proofing column is not visual enough, and the difficulty of observation of an operator is improved. The width of the mistake proofing column 31 is the same as the width of the cavity of the pressing die head, and the width can be 9mm, 10mm, 11mm and 12mm.

Preferably, the lip 2 is integrally formed of PTFE. PTFE is polytetrafluoroethylene, commonly known as "plastic king", and is a high molecular polymer prepared by polymerizing tetrafluoroethylene as a monomer. The sealing ring has the characteristics of excellent heat resistance and cold resistance, acid resistance, alkali resistance and various organic solvents resistance, can not be influenced by organic solvents such as cooling oil liquid and the like in the sealing process of a rotating shaft, and has long service life and low friction coefficient.

Preferably, the sealing portion 22 is inclined toward the center of the shaft hole 111 in the extending direction of the vertical section 12. When the rotary shaft passes through the shaft hole 111, the inclined sealing part 22 can elastically abut against the side wall of the rotary shaft, and the self elasticity provides the abutting force for sealing, so that the sealing effect is good.

Preferably, the oil seal further comprises a dust lip 4, the dust lip 4 is fixedly arranged on the horizontal section 11, and the dust lip 4 extends towards the center of the shaft hole 111. Dust entering between the lip 2 and the rotating shaft easily causes abrasion of the rotating shaft, thereby causing seal failure and even entering the inside of a mechanical device to cause damage to parts such as gears. The dust lip 4 extends towards the center of the shaft hole 111 and can abut against the side wall of the rotating shaft penetrating through the shaft hole 111, so that the dust-proof capability is provided for a mechanical device, and the service life of the oil seal and the mechanical device is prolonged. Preferably, the dust lip 4 and the adhesive layer 3 are integrally formed by vulcanization of rubber.

Further, the dust lip 4 is inclined toward the center of the shaft hole 111 in a direction away from the seal portion 22. The dust lip 4 extends in the opposite direction to the lip 2 in the circumferential direction, wherein the lip 2 is inclined inward of the machine and the dust lip 4 is inclined outward of the machine. The principle lies in that the lip 2 can prevent oil inside the mechanical device from flowing out, and most of the oil cannot be accumulated between the lip 2 and the rotating shaft. The dust lip 4 can prevent the entry of external dust, and most of the dust does not accumulate between the lip 2 and the rotary shaft.

In order to fix the dust lip 4, a part of the dust lip 4 is disposed on one side of the horizontal section 11 facing the vertical section 12, is located between the mounting portion 21 of the lip 2 and the horizontal section 11, and is fixed by rubber vulcanization.

Preferably, the oil seal further comprises a dustproof felt 5, and the dustproof felt 5 is fixedly arranged on one side, away from the vertical section 12, of the horizontal section 11. It is understood that although the dust is blocked by the dust lip 4, a part of the dust is accumulated between the dust lip 4 and the rotating shaft, and a part of the dust enters the inside of the mechanical device when the rotating shaft rotates. And the dustproof felt 5 can reduce the probability that external dust contacts the dustproof lip 4, thereby preventing the dust from being accumulated between the dustproof lip 4 and the rotating shaft and improving the dustproof effect. Specifically, the dustproof felt 5 is made of a non-woven fabric gasket, and the non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity, no irritation, rich colors, low price and recycling.

Preferably, the vertical section 12 is externally covered with an outer rubber coating, the dustproof felt 5, the dustproof lip 4, the lip 2 and the framework 1 are fixed through rubber vulcanization and adhesion, rubber is integrated, and after the framework 1 is covered with rubber, the outer rubber coating, the dustproof felt 5, the dustproof lip 4 and the lip 2 are placed at corresponding positions and then vulcanization processing is carried out.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. An oil seal with adhesion reliability, characterized by comprising:

the framework (1) comprises a horizontal section (11) and a vertical section (12) which surrounds the circumferential direction of the horizontal section (11) and extends along the direction vertical to the horizontal section (11), and the horizontal section (11) is provided with a shaft hole (111);

the lip piece (2) comprises an installation part (21) and a sealing part (22), the installation part (21) is fixedly arranged on one side, facing the vertical section (12), of the horizontal section (11), and the sealing part (22) extends to the center of the shaft hole (111);

paste layer (3), paste layer (3) set up in installation department (21) with between horizontal segment (11), the edge of pasting layer (3) passes installation department (21) with follow between vertical segment (12) extend and form mistake proofing post (31).

2. The oil seal with the adhesion reliability according to claim 1, wherein the edge of the adhesive layer (3) is provided with a plurality of the error-proofing columns (31), and the plurality of the error-proofing columns (31) are provided at intervals in the circumferential direction of the mounting portion (21).

3. The oil seal with the adhesion reliability as claimed in claim 2, wherein the angle between the connecting lines of the centers of the circle of the adjacent mistake-proof columns (31) and the shaft hole (111) is 45 °.

4. The oil seal with adhesion reliability as claimed in claim 1, wherein the height of the error-proofing column (31) is 10-20mm.

5. The oil seal with adhesion reliability as claimed in claim 1, wherein the error proofing column (31) has a width of 8-13mm.

6. The oil seal with the adhesion reliability as claimed in claim 1, wherein the lip (2) is integrally formed of PTFE.

7. The oil seal with the adhesion reliability according to any one of claims 1 to 6, wherein the sealing portion (22) is inclined toward the center of the shaft hole (111) in the extending direction of the vertical section (12).

8. The oil seal with the adhesion reliability according to claim 7, further comprising a dust lip (4), wherein the dust lip (4) is fixedly arranged on the horizontal section (11), and the dust lip (4) extends towards the center of the shaft hole (111).

9. The oil seal with the adhesion reliability according to claim 8, wherein the dust lip (4) is inclined toward the center of the shaft hole (111) in a direction away from the seal portion (22).

10. The oil seal with the adhesion reliability as claimed in claim 7, further comprising a dustproof felt (5), wherein the dustproof felt (5) is fixedly arranged on one side of the horizontal section (11) departing from the vertical section (12).

Images