CN211082840U - Sealing device used between fixed shaft and rotating part - Google Patents
Sealing device used between fixed shaft and rotating part Download PDFInfo
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- CN211082840U CN211082840U CN201922245984.0U CN201922245984U CN211082840U CN 211082840 U CN211082840 U CN 211082840U CN 201922245984 U CN201922245984 U CN 201922245984U CN 211082840 U CN211082840 U CN 211082840U
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Abstract
The utility model discloses a sealing device that is used for fixed axle class and rotates between piece, sealing device sets up between fixed axle and rotation piece, sealing device includes the suit in fixed epaxial interior oil blanket seat, interior oil blanket seat inboard is provided with O type sealing washer, and O type sealing washer and fixed axle in close contact with, but interior oil blanket seat outer wall cover is equipped with the oil blanket of relative sliding, the outer wall of oil blanket and the shaft hole inner wall interference fit fixed mounting who rotates the piece rotate in the piece. The utility model discloses can prevent to rotate the phenomenon of piece lubricating grease liquefaction seepage, avoid the emergence of unnecessary potential safety hazard and accident, the oil blanket seat plays the fixed stay effect to O type seal ring in the while, has increased substantially the sealing performance of fixed axle, guarantees the radial seal of fixed axle.
Description
Technical Field
The utility model relates to an automobile parts technical field especially relates to a sealing device that is used for fixed axle class and rotates between piece.
Background
When a vehicle drive bridge part is assembled, in order to ensure that a rotating part operates stably and smoothly, calcium-based lubricating grease is generally added during the assembly of a drive axle, when a vehicle runs continuously, the calcium-based lubricating grease is converted from a solid state into a liquid state under the condition that the temperature of the rotating part is continuously increased, the liquid lubricating oil leaks through gaps between the assembled parts, and the potential safety hazard of the working and running of the vehicle is increased; on the other hand, when the sealing performance of the fixed shaft is insufficient, lubricating oil leaks, liquid lubricating oil permeates into a brake drum of the vehicle through a gap between the fixed shaft and an assembly part, the brake of the vehicle is realized by the contact friction between a brake shoe and the brake drum, and if the oil permeates into the brake drum, the brake of the vehicle is influenced, so that potential safety hazards are generated.
SUMMERY OF THE UTILITY MODEL
To above-mentioned defect or not enough, the utility model aims to provide a sealing device for fixed axle class and rotate between the piece can prevent to rotate the possibility of piece lubricating grease liquefaction seepage, the effectual sealing performance who improves the fixed axle simultaneously.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model provides a sealing device for between fixed axle class and rotation piece, sealing device sets up between fixed axle and rotation piece, sealing device is including suit in the fixed epaxial interior oil blanket seat, interior oil blanket seat inboard is provided with O type sealing washer, and O type sealing washer and fixed axle in close contact with, but interior oil blanket seat outside cover is equipped with the oil blanket of relative sliding, the outer wall of oil blanket and the shaft hole inner wall interference fit fixed mounting who rotates the piece rotate in.
The oil seal is a rotary shaft lip-shaped sealing ring.
And the inner lip of the rotary shaft lip-shaped sealing ring is in interference fit with the outer wall of the inner oil seal seat.
The inner oil seal seat and the fixed shaft are fixedly arranged on the fixed shaft in a clearance fit manner.
One side of the inner oil seal seat close to the fixed shaft is provided with a seal groove, and the seal groove is matched with the O-shaped seal ring.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a sealing device for between fixed axle class and rotation piece, because the setting of interior oil blanket seat and oil blanket sealing part, assemble on fixed axle class part through interior oil blanket seat, O type sealing washer assembles between interior oil blanket seat and fixed axle class part, play the grease seal effect, prevent that the grease of leakage from permeating to the vehicle brake drum through the gap of fixed axle and assembly part, make the braking of vehicle break down, avoid the emergence of potential safety hazard, simultaneously, interior oil blanket seat plays the fixed supporting role to O type sealing washer, increased the sealing performance of fixed axle by a wide margin, guarantee the radial seal of fixed axle; through installing the oil blanket on rotating an axle hole inner wall, play grease seal effect, can prevent to rotate the phenomenon of piece lubricating grease liquefaction seepage, prevent that grease liquefaction seepage from to the vehicle brake drum, make the braking of vehicle break down, avoid the emergence of unnecessary potential safety hazard and accident, in oil sealing device can prevent that external dust from invading the bearing that rotates the piece simultaneously, avoid rotating a piece trouble, it is further, oil sealing device can prevent to rotate the wearing and tearing of piece inner wall.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a portion of the enlarged structure of FIG. 1;
FIG. 3 is a schematic structural view of the inner oil seal seat of the present invention;
fig. 4 is a schematic structural view of the lip-shaped sealing ring of the rotating shaft according to the present invention;
FIG. 5 is a schematic view of the static seal of the rotary shaft seal ring of FIG. 3;
fig. 6 is a schematic view of the dynamic sealing principle of the rotary shaft sealing ring in fig. 3.
In the figure, 1-a fixed shaft; 2-O-ring seal; 3-inner oil seal seat; 4, oil sealing; 5, rotating the part; 41-sealing lip; 42-spring ring; 43-metal skeleton.
Detailed Description
The present invention will be described in detail with reference to the drawings, and it should be understood 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.
As shown in fig. 1-3, a sealing device for fixing shafts and rotating members, wherein the rotating member 5 is sleeved on the outer side of a fixing shaft 1 and rotates relatively, the sealing device is arranged between the fixing shaft 1 and the rotating member 5, the sealing device comprises an inner oil seal seat 3 sleeved on the fixing shaft 1, the inner oil seal seat 3 and the fixing shaft 1 are fixedly mounted on the fixing shaft 1 in a clearance fit manner, an O-shaped sealing ring 2 is arranged on the inner side of the inner oil seal seat 3, the O-shaped sealing ring 2 is in tight contact with the fixing shaft 1, a sealing groove is formed in one side of the inner oil seal seat 3 close to the fixing shaft 1, and the sealing groove is matched with the O-shaped sealing ring 2; but 3 outer wall covers of interior oil blanket seat are equipped with relative slip's oil blanket 4, the outer wall of oil blanket 4 and the shaft hole inner wall interference fit fixed mounting who rotates piece 5 rotate in 5.
Preferably, the oil seal 4 is a rotary shaft lip seal. And a sealing lip (inner side lip) of the rotary shaft lip-shaped sealing ring is in interference fit with the outer wall of the inner oil seal seat 3.
In the utility model, the inner oil seal seat 3 is assembled on the fixed shaft part, the O-shaped sealing ring 2 is assembled between the inner oil seal seat 3 and the fixed shaft part, the grease sealing function is realized, the leaked grease is prevented from permeating into a vehicle brake drum through the gap between the fixed shaft and the assembled part, the braking of a vehicle is in failure, the safety hidden danger is avoided, meanwhile, the inner oil seal seat 3 plays a role in fixing and supporting the O-shaped sealing ring 2, the sealing performance of the fixed shaft 1 is greatly improved, and the radial sealing of the fixed shaft 1 is ensured; the oil seal 4 is assembled between the inner oil seal seat 3 and the rotating part 5, plays a role in oil sealing, prevents that the calcium-based lubricating grease is converted into liquid from solid under the condition that the rotating part 5 is continuously heated when the vehicle is in continuous operation, prevents the leakage phenomenon of the liquid lubricating oil through gaps between assembling parts, prevents the grease from liquefying and leaking into a brake drum of the vehicle, makes the braking of the vehicle break down, and avoids the potential safety hazard of the working operation of the vehicle. Rotation axis lip seal can also prevent that external dust from invading in the bearing that rotates piece 5, avoids rotating the piece and breaks down, and is further, because rotation axis lip seal main part is made by rubber, can prevent to rotate the wearing and tearing of 5 inner walls to the extension rotates the life of piece 5.
It should be noted that the O-shaped sealing ring 2 is a national standard, and the selected specification is defined by the outer diameter of the fixed shaft 1; the inner oil seal seat 3 is a self-made piece, and the specification and the size are defined by the outer diameter of the fixed shaft 1 and the inner diameter of the oil seal 4; the oil seal 4 is a national standard part, and the matching specification is defined by the inner diameter of the shaft hole of the rotating part 5.
As shown in fig. 4-6, the working process and working principle of the present invention are as follows: the lip-shaped seal ring main body of the rotating shaft is made of rubber, one side of the lip-shaped seal ring main body, which is close to the rotating piece 5, is provided with a metal framework 43, and the metal framework 43 is used for enhancing the strength of the seal ring so as to be firmly installed on the rotating piece 5; one side of the oil seal seat close to the inner oil seal seat 3 is provided with an elastic seal lip 41 which is tightly contacted with the outer wall of the inner oil seal seat 3 under the action of a spring ring 42, so that the liquid lubricating oil is prevented from leaking through gaps between assembling parts.
The lip-shaped sealing ring of the rotating shaft has the functions of static sealing and dynamic sealing; static sealing, after the rotating shaft lip seal ring is assembled, the seal lip 41 generates a radial force F1 pressing towards the inner oil seal seat 3, and a radial resultant force F2 formed by the metal frame and the spring ring is added, so that the rotating shaft lip seal ring obtains the effect of static sealing; dynamic sealing, when the rotary shaft lip-shaped sealing ring starts to rotate along with the rotating piece 5, a narrow sliding sealing surface area is formed between the outer wall of the inner oil sealing seat 3 and the sealing lip 41, asymmetric stress distribution is generated on the contact surface due to the change of the geometric shape of the sealing lip, the friction state of the contact area is static friction at the moment, the static friction is converted into fluid dynamic friction through mixed friction, oil film is formed by the flow of oil, the necessary condition for sealing the rotary shaft lip-shaped sealing ring is that the flowing oil film generated at the lip of the sealing lip 41 just can contact with air to form a meniscus under the action of the surface tension of the liquid, and therefore the liquid flowing to the oil liquid side generates a transmission effect, so that the oil leakage is prevented, and the dynamic sealing effect of the rotary shaft lip-shaped.
It should be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and therefore, the modifications and changes that can be made by those skilled in the art to some parts of the present invention still embody the principles of the present invention, and the objects of the present invention are achieved, all falling within the scope of the present invention.
Claims (5)
1. The utility model provides a sealing device for fixed axle class and rotate between piece, a serial communication port, sealing device sets up between fixed axle (1) and rotation piece (5), sealing device is including suit interior oil seal seat (3) on fixed axle (1), interior oil seal seat (3) inboard is provided with O type sealing washer (2), and O type sealing washer (2) and fixed axle (1) in close contact with, but interior oil seal seat (3) outer wall cover is equipped with relative sliding's oil blanket (4), the outer wall of oil blanket (4) and the shaft hole inner wall interference fit fixed mounting who rotates piece (5) are in rotating piece (5).
2. A sealing arrangement according to claim 1, characterized in that the oil seal (4) is a rotary shaft lip seal.
3. A sealing arrangement according to claim 2, characterised in that the sealing lip of the rotary shaft lip seal is an interference fit with the outer wall of the inner oil seal holder (3).
4. The sealing arrangement according to claim 1, characterized in that the inner oil seal holder (3) is fixedly mounted on the stationary shaft (1) with a clearance fit with the stationary shaft (1).
5. The sealing device according to claim 1, wherein a sealing groove is formed in one side of the inner oil seal seat (3) close to the fixed shaft (1), and the sealing groove is matched with the O-shaped sealing ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245984.0U CN211082840U (en) | 2019-12-16 | 2019-12-16 | Sealing device used between fixed shaft and rotating part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245984.0U CN211082840U (en) | 2019-12-16 | 2019-12-16 | Sealing device used between fixed shaft and rotating part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211082840U true CN211082840U (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922245984.0U Active CN211082840U (en) | 2019-12-16 | 2019-12-16 | Sealing device used between fixed shaft and rotating part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211082840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321382A (en) * | 2021-12-23 | 2022-04-12 | 中国航发哈尔滨东安发动机有限公司 | Contact dynamic seal structure suitable for oil circuit between rotating piece and static piece |
-
2019
- 2019-12-16 CN CN201922245984.0U patent/CN211082840U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321382A (en) * | 2021-12-23 | 2022-04-12 | 中国航发哈尔滨东安发动机有限公司 | Contact dynamic seal structure suitable for oil circuit between rotating piece and static piece |
| CN114321382B (en) * | 2021-12-23 | 2024-05-28 | 中国航发哈尔滨东安发动机有限公司 | Contact dynamic seal structure suitable for oil circuit between rotating piece and static piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210624 Address after: No. 127, Baofu Road, Jintai District, Baoji City, Shaanxi Province Patentee after: Baoji Heli forklift Co.,Ltd. Address before: No. 127, Baofu Road, Baoji City, Shaanxi Province Patentee before: ANHUI HELI Co.,Ltd. BAOJI HELI FORKLIFT TRUCK PLANT |
|
| TR01 | Transfer of patent right |