CN218953855U - Bearing oil seal structure - Google Patents
Bearing oil seal structure Download PDFInfo
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- CN218953855U CN218953855U CN202320113256.8U CN202320113256U CN218953855U CN 218953855 U CN218953855 U CN 218953855U CN 202320113256 U CN202320113256 U CN 202320113256U CN 218953855 U CN218953855 U CN 218953855U
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Abstract
The utility model discloses a bearing oil seal structure, which comprises a bearing body, a shaft and a bearing cover, wherein a baffle ring is arranged at one end, close to a bearing, of the bearing cover and positioned at the edge of a bearing cover hole, and a small clearance seal is formed between the inner circumferential surface of the baffle ring and the shaft so as to form an annular oil cavity between the baffle ring and a shaft seal shaft sleeve and used for storing leaked lubricating oil; an oil return gap penetrating the annular oil cavity and the oil storage cavity is formed in the end face of the baffle ring, and the oil return gap is close to the bottom of the annular oil cavity, so that lubricating oil in the annular oil cavity flows back to the oil storage cavity. According to the utility model, the baffle ring is arranged on the bearing cover, a small gap seal is formed between the baffle ring and the shaft, and most of lubricating oil thrown up by high-speed rotation of the bearing and the like can be prevented from entering the annular oil cavity after the baffle ring by the baffle ring; meanwhile, the annular oil cavity is communicated with the oil storage cavity through the oil return notch, so that lubricating oil entering the annular oil cavity is led back into the oil storage cavity, leakage of the lubricating oil is prevented, and the sealing effect is improved.
Description
Technical Field
The utility model relates to the technical field of bearing sealing, in particular to a bearing oil seal structure.
Background
The prior bearing oil seal structure is shown in fig. 1 and 2, and comprises a bearing body 1, a shaft 2 and a bearing cover 3, wherein a bearing hole is formed in the bearing body, the shaft 2 is arranged in the bearing hole of the bearing body through a bearing 4, and the end part of the shaft extends out of the bearing body; the bearing cover 3 is provided with a bearing cover hole, the bearing cover is sleeved on the shaft through the bearing cover hole and is fastened with the bearing body through a fastener, and an oil storage cavity 5 is formed between the bearing cover 3 and the bearing 4 and used for storing lubricating oil; shaft cover grooves 31 are circumferentially formed in the wall of the bearing cover hole of the bearing cover 3, a plurality of shaft cover grooves are uniformly formed in the shaft cover holes at axial intervals, shaft cover teeth 32 are formed between adjacent shaft cover grooves, and oil return groove notches 33 which penetrate through all the shaft cover grooves and the oil storage cavity are formed in one end, close to the bearing, of the bearing cover; the shaft 2 is sleeved with a shaft seal shaft sleeve 6, shaft sleeve grooves corresponding to the shaft cover grooves one by one are formed in the outer circumferential surface of the shaft seal shaft sleeve, shaft sleeve teeth are formed between adjacent shaft sleeve grooves, all shaft sleeve grooves on the shaft seal shaft sleeve are opposite to the shaft cover groove openings one by one, a seal groove area is formed between the shaft sleeve grooves and the shaft cover grooves, and the shaft seal shaft sleeve is fastened with the shaft through a locking piece so that the shaft seal shaft sleeve rotates synchronously with the shaft.
According to the bearing oil seal structure, the plurality of shaft cover grooves are uniformly formed in the bearing cover hole of the bearing cover at axial intervals, the shaft sleeve grooves corresponding to the shaft cover grooves one to one are formed in the outer peripheral surface of the shaft seal shaft sleeve, a sealing groove area is formed between the shaft sleeve grooves and the shaft cover grooves, when lubricating oil enters the sealing groove area, the lubricating oil is prevented from leaking by blocking, the sealing effect is achieved through rotation of the shaft during running, and moisture, dust and the like are prevented from entering the bearing body. However, the oil return groove notch is formed in the bearing cover, so that the sealing effect of the sealing groove area is weakened, sealing resistance is reduced, lubricating oil is accumulated in the groove of the shaft cover under the action of centrifugal force when the shaft rotates at a high speed, and the risk that the lubricating oil is thrown out continuously along the shaft exists, so that the lubricating oil leaks, the waste of the lubricating oil is caused, and the surrounding environment is polluted. Therefore, the sealing effect of the existing bearing oil seal structure is poor, and lubricating oil leakage cannot be prevented.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: how to provide a bearing oil seal structure, solve how to further improve sealed effect, prevent the problem that lubricating oil leaked.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the bearing oil seal structure comprises a bearing body, a shaft and a bearing cover, wherein a bearing hole is formed in the bearing body, the shaft is arranged in the bearing hole of the bearing body through a bearing, and the end part of the shaft extends out of the bearing body; the bearing cover is provided with a bearing cover hole, the bearing cover is sleeved on the shaft through the bearing cover hole and is fastened with the bearing body through a fastener, and an oil storage cavity is arranged between the bearing cover and the bearing and used for storing lubricating oil; shaft cover grooves are circumferentially formed in the wall of the bearing cover hole of the bearing cover, the shaft cover grooves are formed in a plurality of axially-spaced and uniformly-formed mode, and shaft cover teeth are formed between adjacent shaft cover grooves; the shaft is sleeved with a shaft seal shaft sleeve, shaft sleeve grooves which are in one-to-one correspondence with shaft cover grooves are formed in the outer circumferential surface of the shaft seal shaft sleeve, shaft sleeve teeth are formed between adjacent shaft sleeve grooves, all shaft sleeve grooves on the shaft seal shaft sleeve are opposite to shaft cover groove openings one by one, a sealing groove area is formed between the shaft sleeve grooves and the shaft cover grooves, the shaft seal shaft sleeve is fastened with the shaft through a locking piece so as to enable the shaft seal shaft sleeve to synchronously rotate along with the shaft, a baffle ring is arranged at one end, close to the bearing, of the bearing cover and positioned at the edge of a bearing cover hole, the inner circumferential surface of the baffle ring is sealed with the shaft in a clearance manner, and an annular oil cavity is formed between the baffle ring and the shaft seal shaft sleeve and used for storing leaked lubricating oil; an oil return gap which penetrates through the annular oil cavity and the oil storage cavity is axially formed in the end face of the baffle ring, and the oil return gap is close to the bottom of the annular oil cavity, so that lubricating oil in the annular oil cavity flows back to the oil storage cavity.
Further, an oil return hole which penetrates through the bottom of the shaft cover groove and the oil storage cavity is axially formed in one end, close to the bearing, of the bearing cover, and an oil return hole outlet is close to the oil return gap so as to guide lubricating oil in the shaft cover groove back to the oil storage cavity.
Further, an annular groove is formed in the circumferential direction of the inner circumferential surface of the shaft cover tooth, so that oil film blocking is formed between the annular groove and the shaft sleeve tooth by lubricating oil.
Further, the cross section of the annular groove is one of V-shaped, rectangular and U-shaped structures.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the baffle ring is arranged on the bearing cover, and forms a small gap seal with the shaft, so that most of lubricating oil thrown up by high-speed rotation of the bearing and the like can be prevented from entering the annular oil cavity after the baffle ring by the baffle ring; meanwhile, the annular oil cavity is communicated with the oil storage cavity through the oil return notch, so that lubricating oil entering the annular oil cavity is led back to the oil storage cavity, leakage of the lubricating oil is prevented, and the sealing effect is improved.
2. The bearing cover is axially provided with an oil return hole which penetrates through the bottom of the shaft cover groove and the oil storage cavity, so that lubricating oil leaked to the sealing groove area can be led back to the oil storage cavity, and leakage caused by accumulation of the lubricating oil in the shaft cover groove is prevented.
3. The annular groove is formed in the shaft cover teeth of the bearing cover, so that leaked lubricating oil can be stored and matched with the shaft sleeve teeth of the shaft seal shaft sleeve for use, and an oil film is formed to block when the shaft rotates at a high speed, so that the sealing effect can be further improved.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a conventional bearing oil seal structure;
FIG. 2 is a schematic view of the bearing cap of FIG. 1;
FIG. 3 is a schematic view of a bearing oil seal structure according to the present utility model;
FIG. 4 is a schematic view of a bearing cap according to the present utility model;
fig. 5 is an enlarged schematic view at a in fig. 4.
In the figure: 1. a bearing body; 2. a shaft; 3. a bearing cap; 4. a bearing; 5. an oil storage chamber; 6. shaft seal sleeve; 7. a baffle ring;
8. an annular oil chamber; 9. an oil return notch; 10. an oil return hole; 11. an annular groove;
31. a shaft cover groove; 32. shaft cover teeth; 33. and an oil return groove notch.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 3 and 4, in this embodiment, a bearing oil seal structure is provided, which includes a bearing body 1, a shaft 2 and a bearing cover 3, wherein a bearing hole is formed in the bearing body, the shaft 2 is installed in the bearing hole of the bearing body through a bearing 4, and the end of the shaft extends out of the bearing body; the bearing cover 3 is provided with a bearing cover hole, the bearing cover is sleeved on the shaft through the bearing cover hole and is fastened with the bearing body through a fastener, and an oil storage cavity 5 is arranged between the bearing cover and the bearing and used for storing lubricating oil; shaft cover grooves are circumferentially formed in the wall of the bearing cover hole of the bearing cover 3, the shaft cover grooves are formed in a plurality of axially-spaced and uniformly-formed manner, and shaft cover teeth are formed between adjacent shaft cover grooves; the shaft 2 is sleeved with a shaft seal shaft sleeve 6, shaft sleeve grooves corresponding to the shaft cover grooves one by one are formed in the outer circumferential surface of the shaft seal shaft sleeve, shaft sleeve teeth are formed between adjacent shaft sleeve grooves, all shaft sleeve grooves on the shaft seal shaft sleeve are opposite to the shaft cover groove openings one by one, a seal groove area is formed between the shaft sleeve grooves and the shaft cover grooves, and the shaft seal shaft sleeve is fastened with the shaft through a locking piece so that the shaft seal shaft sleeve rotates along with the shaft.
The baffle ring 7 is arranged at one end of the bearing cover 3 close to the bearing and positioned at the edge of the bearing cover hole, the inner diameter of the baffle ring is the same as the diameter of the shaft, or the inner diameter of the baffle ring is larger than the diameter of the shaft and smaller than the inner diameter of the bearing cover hole, or a gap seal is formed between the inner circumferential surface of the baffle ring and the shaft, so that an annular oil cavity 8 is formed between the baffle ring and the shaft seal shaft sleeve and used for storing leaked lubricating oil in the oil storage cavity. Therefore, the baffle ring is arranged on the basis of the existing bearing cover, so that most of lubricating oil thrown up by the rotation of the bearing and other parts can be prevented from entering the annular oil cavity from a gap between the baffle ring and the shaft. However, when the lubricating oil in the annular oil cavity is accumulated to a certain extent, the lubricating oil is accumulated in the shaft cover groove under the action of centrifugal force, so that the lubricating oil leakage time can only be prolonged, and the lubricating oil leakage cannot be prevented.
Therefore, in this embodiment, an oil return gap is further provided, so that the annular oil cavity is communicated with the oil storage cavity, and lubricating oil in the annular oil cavity flows back to the oil storage cavity, so that the lubricating oil can flow circularly. Specifically, an oil return gap 9 which penetrates through the annular oil cavity and the oil storage cavity is axially formed in the end face of the baffle ring 7, and the oil return gap is close to the bottom of the annular oil cavity, so that accumulation of lubricating oil in the annular oil cavity is reduced. Or an oil return gap with two ends penetrating through the annular oil cavity and the oil storage cavity is formed on the hole wall of the bearing cover hole.
Like this, after the rotatory lubricating oil that gets rid of the axle gets into annular oil pocket through the clearance of baffle ring and axle, return oil storage chamber with the lubricating oil of annular oil pocket through the oil return breach to make lubricating oil circulate at annular oil pocket and oil storage chamber, avoid lubricating oil to pile up in the axle cap inslot, thereby prevent that lubricating oil from leaking, improve sealed effect.
Referring to fig. 5, in order to avoid weakening the sealing effect of the sealing groove region and simultaneously prevent leakage of lubricating oil after accumulation in the shaft cover groove, in this embodiment, oil return holes penetrating through the bottoms of all shaft cover grooves and the oil storage cavity are axially formed at one end of the bearing cover, close to the bearing, and oil return hole outlets are close to the oil return notch, so that lubricating oil in the shaft cover groove is led back to the oil storage cavity, so that the lubricating oil circularly flows in the shaft cover groove and the oil storage cavity, further preventing leakage of the lubricating oil and improving the sealing effect. Or the bottom of the shaft cover groove 31 is obliquely provided with an oil return hole communicated with the oil storage cavity 5, and the outlet of the oil return hole is close to the oil return notch, namely, the oil return hole and the oil return notch are positioned at the same position in the circumferential direction of the bearing cover so as to lead lubricating oil in the shaft cover groove back to the oil storage cavity, and prevent the lubricating oil from leaking after being accumulated in the shaft cover groove.
Like this, replace current oil return groove breach through the oil gallery, when can leading lubricating oil back to the oil storage chamber, can also avoid causing too much damage to the structure of axle cap groove, axle cap tooth to avoid weakening the sealed effect in seal groove area.
In order to further improve the sealing effect, in this embodiment, an annular groove 11 is formed in the circumferential direction of the inner circumferential surface of the shaft cover teeth 32. On the one hand, this way, leaked lubricating oil can be stored via the annular groove; on the other hand, when the shaft seal shaft sleeve rotates along with the shaft, an oil film can be formed between the annular groove and the shaft sleeve teeth through lubricating oil to block, so that the sealing effect can be further improved.
Further, the cross section of the annular groove 11 may be one of V-shaped, rectangular and U-shaped structures, or others; to facilitate the opening on the shaft cover teeth 32, the cross section of the annular groove is V-shaped in this embodiment.
It should be further noted that, in this embodiment, the baffle ring, the oil return hole and the annular groove may be separately disposed on the bearing cover, or may be disposed on the bearing cover in a combination of two pairs, specifically may be determined according to the sealing requirement. The baffle ring and the bearing cover are of an integrated structure.
When the bearing cover 3 is fastened with the bearing body 1 through a fastener (bolt), an oil return hole and an oil return notch on the bearing cover need to be close to the ground so as to guide lubricating oil back into the oil storage cavity.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the utility model, and that those skilled in the art will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. The bearing oil seal structure comprises a bearing body (1), a shaft (2) and a bearing cover (3), wherein a bearing hole is formed in the bearing body, the shaft is arranged in the bearing hole of the bearing body through a bearing (4), and the end part of the shaft extends out of the bearing body; a bearing cover hole is formed in the bearing cover (3), the bearing cover is sleeved on the shaft through the bearing cover hole and is fastened with the bearing body through a fastener, and an oil storage cavity (5) is formed between the bearing cover and the bearing and used for storing lubricating oil; shaft cover grooves (31) are circumferentially formed in the wall of the bearing cover hole of the bearing cover (3), a plurality of shaft cover grooves are uniformly formed in the axial direction at intervals, and shaft cover teeth (32) are formed between every two adjacent shaft cover grooves; the bearing is characterized in that a baffle ring (7) is arranged at one end, close to the bearing (4), of the bearing cover (3) and positioned at the edge of a bearing cover hole, a gap between the inner circumferential surface of the baffle ring and the shaft is sealed, and an annular oil cavity (8) is formed between the baffle ring and the bearing cover and used for storing leaked lubricating oil; an oil return gap (9) which penetrates through the annular oil cavity and the oil storage cavity is axially formed in the end face of the baffle ring (7), and the oil return gap is close to the bottom of the annular oil cavity, so that lubricating oil in the annular oil cavity flows back to the oil storage cavity.
2. The bearing oil seal structure according to claim 1, wherein an oil return hole (10) penetrating through the bottom of the shaft cover groove and the oil storage cavity is axially formed in one end, close to the bearing, of the bearing cover (3), and an outlet of the oil return hole is close to the oil return notch so as to guide lubricating oil in the shaft cover groove back to the oil storage cavity.
3. Bearing oil seal structure according to claim 1 or 2, characterized in that an annular groove (11) is circumferentially provided in the inner circumferential surface of the shaft cover teeth (32) so that the lubricating oil forms an oil film barrier between the annular groove and the shaft sleeve teeth.
4. A bearing oil seal structure according to claim 3, wherein the annular groove (11) has a cross section of one of V-shaped, rectangular and U-shaped configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320113256.8U CN218953855U (en) | 2023-01-16 | 2023-01-16 | Bearing oil seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320113256.8U CN218953855U (en) | 2023-01-16 | 2023-01-16 | Bearing oil seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218953855U true CN218953855U (en) | 2023-05-02 |
Family
ID=86141083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320113256.8U Active CN218953855U (en) | 2023-01-16 | 2023-01-16 | Bearing oil seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218953855U (en) |
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2023
- 2023-01-16 CN CN202320113256.8U patent/CN218953855U/en active Active
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