CN220168564U - Sealing device of low-speed rotating shaft - Google Patents
Sealing device of low-speed rotating shaft Download PDFInfo
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- CN220168564U CN220168564U CN202321444114.6U CN202321444114U CN220168564U CN 220168564 U CN220168564 U CN 220168564U CN 202321444114 U CN202321444114 U CN 202321444114U CN 220168564 U CN220168564 U CN 220168564U
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- shaft
- rotating shaft
- sealing
- opening sliding
- sealing device
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- 238000007789 sealing Methods 0.000 title claims abstract description 120
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 6
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 18
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The utility model discloses a sealing device of a low-speed rotating shaft, which is arranged between the rotating shaft and a shaft seat, wherein the sealing device comprises a sealing ring and an opening sliding shaft sleeve, the shaft seat is provided with a shaft hole, the rotating shaft penetrates through the shaft hole and extends out of the shaft seat at two ends, the sealing device is respectively arranged between the rotating shaft and the shaft hole walls close to the two ends of the shaft seat, the sealing ring and the opening sliding shaft sleeve are arranged on the rotating shaft, the sliding shaft sleeve is positioned outside the sealing ring, and when the rotating shaft rotates, the rotating shaft drives the sealing ring and the opening sliding shaft sleeve to rotate together, and an oil cavity is formed among the rotating shaft, the shaft seat and the two opening sliding shaft sleeves. After assembly, the shaft sealing ring slightly expands the opening sliding shaft sleeve, the outer circle of the opening sliding shaft sleeve and the inner hole of the shaft seat form an infinitely close to 0 clearance fit, and an oil film can be formed between the outer circle of the opening sliding shaft sleeve and the inner hole wall of the shaft seat due to the lubricating effect of the oil cavity. Therefore, the sealing device has almost no abrasion, the sealing performance is not reduced due to long-time use, and the reliability is high.
Description
Technical Field
The utility model relates to the technical field of shaft sealing, in particular to a sealing device of a low-speed rotating shaft.
Background
Seals for rotating shafts in general can be divided into seals for high speed shaft rotating shafts and seals for low speed rotating shafts. For example, as shown in fig. 2, the engine crankshaft needs to extend from the inside of the engine body 101 to do work, generally, a labyrinth type oil seal 103 is adopted, a small amount of oil is arranged at the oil seal, when the crankshaft 102 rotates at a high speed, the engine oil attached to the crankshaft 102 forms centrifugal force, and an oil stem 104 is formed at a slit of the oil seal, so that a better sealing effect is further achieved. However, the crank shaft rotates at a high speed to form an oil stalk, and the centrifugal force is small when the shaft rotates at a low speed, so that the structure cannot be adopted.
In the prior art, no-clearance sealing is usually adopted between a shaft and a shaft hole wall, and radial sealing in which an elastic material or felt is generally adopted to directly contact with a rotating shaft is generally adopted, as shown in fig. 3, a sealing ring 203 is arranged between the rotating shaft 201 and a sealing seat 202, clearance fit is adopted between the rotating shaft 201 and the sealing seat 202, and the no-clearance sealing between the rotating shaft 201 and the sealing seat 202 is easy to wear due to friction pair, so that in the wearing process, the sealing performance is reduced, even the sealing is invalid, the reliability of a product is affected, and the service life of a sealing piece is shortened.
Therefore, there is a need to devise a sealing device for a low speed shaft that ensures reliable sealing of the shaft at low speeds without rapid wear of the components.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the utility model is to provide the sealing device for the low-speed shaft, so that the sealing reliability of the shaft can be ensured under the condition of low rotation speed, and the rapid abrasion of parts is avoided.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a sealing device of low-speed rotation axis, sets up between rotation axis and axle bed, its characterized in that:
the sealing device comprises a sealing ring and an opening sliding shaft sleeve, the shaft seat is provided with a shaft hole, the rotating shaft penetrates through the shaft hole and two ends of the rotating shaft extend out of the shaft seat, the sealing device is arranged between the rotating shaft and the shaft hole walls close to two ends of the shaft seat respectively, the sealing ring and the opening sliding shaft sleeve are installed on the rotating shaft, the sliding shaft sleeve is located outside the sealing ring, when the rotating shaft rotates, the rotating shaft drives the sealing ring and the opening sliding shaft sleeve to rotate together, and an oil cavity is formed between the rotating shaft, the shaft seat and the two opening sliding shaft sleeves.
Preferably: the opening part of the opening sliding shaft sleeve comprises an arc inner baffle and an arc outer baffle, and the arc inner baffle and the arc outer baffle are overlapped and lapped, and a slit is arranged between the arc inner baffle and the arc outer baffle.
Preferably: the inner angle of the arc inner baffle is set to be a chamfer angle, and the outer angle of the arc outer baffle is set to be a chamfer angle.
Preferably: and a gap between the arc-shaped inner baffle and the arc-shaped outer baffle is Z-shaped when seen from the end part of the opening sliding shaft sleeve.
Preferably: the opening of the opening sliding shaft sleeve is formed by processing through a linear cutting process.
Preferably: the gap fit of H7/g6 is adopted between the opening sliding shaft sleeve and the shaft hole wall of the shaft seat.
Preferably: the rotary shaft is provided with a sealing ring groove, and the sealing ring is arranged at the sealing ring groove.
Preferably: the rotary shaft and the shaft seat are further provided with limiting devices for preventing the sealing devices from falling out, the sealing devices comprise first sealing devices and second sealing devices, the limiting devices comprise positioning spigots positioned on the rotary shaft and upper shaft shells sleeved outside the rotary shaft, the positioning spigots limit the first sealing devices to move downwards, and the upper shaft shells limit the opening sliding shaft sleeves to move upwards.
After the technical scheme is adopted, the utility model has the beneficial effects that:
the sealing device of the low-speed rotating shaft is arranged between the rotating shaft and the shaft seat, the sealing device comprises a sealing ring and an opening sliding shaft sleeve, the shaft seat is provided with a shaft hole, the rotating shaft penetrates through the shaft hole and two ends of the shaft hole extend out of the shaft seat, the sealing device is respectively arranged between the rotating shaft and the shaft hole walls close to the two ends of the shaft seat, the sealing ring and the opening sliding shaft sleeve are arranged on the rotating shaft, the sliding shaft sleeve is positioned outside the sealing ring, and when the rotating shaft rotates, the rotating shaft drives the sealing ring and the opening sliding shaft sleeve to rotate together, and an oil cavity is formed among the rotating shaft, the shaft seat and the two opening sliding shaft sleeves.
After the sealing ring and the opening sliding shaft sleeve are assembled with the rotating shaft, the opening sliding shaft sleeve can be slightly spread by the shaft sealing ring, the excircle of the opening sliding shaft sleeve and the inner hole of the shaft seat form an infinite fit close to 0 clearance, when the rotating shaft rotates, the opening sliding shaft sleeve is driven to rotate together due to the tension action of the sealing ring, and meanwhile, an oil film can be formed between the excircle of the opening sliding shaft sleeve and the inner hole wall of the shaft seat due to the lubrication action of the oil cavity. The sliding shaft sleeve with the opening is not directly worn unless the sealing ring is aged, and the sealing ring is only required to be replaced, so that the aging time of the sealing ring is more than 15000 hours in general, and the dismounting time of the sealing device is prolonged. And is simpler in construction than conventional sealing devices. The sealing device has little abrasion consumption, so that the sealing performance is not reduced due to long-time use, and the reliability is high.
In summary, the sealing device for the low-speed shaft ensures the sealing reliability of the shaft under the condition of low rotation speed, and avoids rapid abrasion of parts.
Drawings
FIG. 1 is a schematic illustration of a seal arrangement for a high speed shaft rotating shaft;
FIG. 2 is a schematic view of a sealing structure of a low speed shaft rotary shaft in the prior art;
FIG. 3 is a schematic view of a seal arrangement for a low speed rotating shaft in accordance with the present utility model;
FIG. 4 is a schematic view of the split sliding sleeve of FIG. 3;
FIG. 5 is an enlarged schematic view of the structure at C in FIG. 4;
in the figure: 1. a rotation shaft; 1001. positioning the spigot; 2. a shaft seat; 3. a seal ring; 4. an open sliding sleeve; 41. an arc inner baffle; 42. an arc-shaped outer baffle; 410. chamfering; 5. a seal ring groove; 6. an oil chamber; A. a first sealing device; B. a second sealing device; D. a slit.
Detailed Description
The following detailed description of the present utility model is provided with reference to the accompanying drawings and specific embodiments, so as to further understand the purpose, the scheme and the effects of the present utility model, but not to limit the scope of the appended claims.
The embodiment of the utility model discloses a sealing device of a low-speed rotating shaft, which is shown in fig. 3, and is arranged between a rotating shaft 1 and a shaft seat 2, wherein the sealing device comprises a sealing ring 3 and an opening sliding shaft sleeve 4, the shaft seat 2 is provided with a shaft hole, the rotating shaft 1 penetrates through the shaft hole and two ends of the shaft seat 2 extend out of the shaft seat 2, the sealing device is respectively arranged between the rotating shaft 1 and shaft hole walls close to two ends of the shaft seat 2, the sealing ring 3 and the opening sliding shaft sleeve 4 are arranged on the rotating shaft 1, the sliding shaft sleeve is positioned outside the sealing ring 3, when the rotating shaft 1 rotates, the rotating shaft 1 drives the sealing ring 3 and the opening sliding shaft sleeve 4 to rotate together, an oil cavity 6 is formed among the rotating shaft 1, the shaft seat 2 and the two opening sliding shaft sleeves 4, and grease is injected into the oil cavity, so that gaps of the opening end face parts can be filled due to high viscosity of the grease.
As shown in fig. 4 and 5, the opening of the sliding sleeve 4 includes an inner arc-shaped block 41 and an outer arc-shaped block 42, and the inner arc-shaped block 41 and the outer arc-shaped block 42 overlap and overlap with a slit D therebetween. The opening of the opening sliding sleeve 4 is formed by a wire cutting process.
The gap between the arc-shaped inner rail 41 and the arc-shaped outer rail 42 is zigzag-shaped as seen from the end of the opening sliding sleeve 4. The inner angle of the arc-shaped inner baffle 41 is set as a chamfer 410, and the outer angle of the arc-shaped outer baffle 42 is set as a chamfer 410, which is beneficial for the oil film to uniformly enter a gap close to 0 and effectively lubricate.
The opening sliding shaft sleeve 4 is processed into a Z-shaped opening by using a linear cutting process, and a complete fitting ring is formed under the tension action of the sealing ring 3, so that the sealing performance is ensured.
The gap fit of H7/g6 is adopted between the opening sliding shaft sleeve 4 and the shaft hole wall of the shaft seat 2. After the sealing ring 3, the opening sliding shaft sleeve 4 and the rotating shaft are assembled, the opening sliding shaft sleeve 4 can be slightly spread under the action of the shaft sealing ring 3, the outer circle of the opening sliding shaft sleeve 4 and the inner hole of the shaft seat 2 form an infinitely close to 0 clearance fit, and meanwhile, an oil film can be formed between the outer circle of the opening sliding shaft sleeve 4 and the inner hole wall of the shaft seat 2 under the lubrication action of the oil cavity. When the rotary shaft 1 rotates, the opening sliding shaft sleeve 4 is driven to rotate together under the tension action of the sealing ring 3.
A sealing ring groove 5 is formed in the rotating shaft 1, and the sealing ring 3 is installed at the sealing ring groove 5.
The rotary shaft 1 and the shaft seat 2 are further provided with limiting devices for preventing the sealing devices from falling out, the sealing devices comprise a first sealing device A and a second sealing device B, the limiting devices comprise positioning spigots 1001 arranged on the rotary shaft 1 and upper shaft shells 7 sleeved outside the rotary shaft, the positioning spigots 1001 limit the first sealing devices to move downwards, and the upper shaft shells limit the opening sliding shaft sleeves 4 to move upwards.
The sealing device of the low-speed rotating shaft has the advantages that the service life of the low-speed or rotating lower opening sliding shaft sleeve 4 is more than 50000 hours under the action of lubricating oil, the sealing device is almost synchronous with the service life of a common machine, the machine life cycle does not need to be replaced, and the sealing device can be used for periodically filling oil.
An oil film is formed between the outer circle of the opening sliding shaft sleeve 4 and the inner hole wall of the shaft seat 2, the opening sliding shaft sleeve 4 is not directly worn, the sealing ring needs to be replaced unless the sealing ring is aged, the aging time of the sealing ring is generally more than 15000 hours, and the dismounting time of the sealing device is prolonged. And is simpler in construction than conventional sealing devices. The sealing device has little abrasion consumption, so that the sealing performance is not reduced due to long-time use, and the reliability is high.
In summary, the sealing device for the low-speed shaft ensures the sealing reliability of the shaft under the condition of low rotation speed, and avoids rapid abrasion of parts.
The present utility model is not limited to the above-described embodiments, and all modifications based on the concept, principle, structure and method of the present utility model are within the scope of the present utility model.
Claims (8)
1. The utility model provides a sealing device of low-speed rotation axis, sets up between rotation axis and axle bed, its characterized in that:
the sealing device comprises a sealing ring and an opening sliding shaft sleeve, the shaft seat is provided with a shaft hole, the rotating shaft penetrates through the shaft hole and two ends of the rotating shaft extend out of the shaft seat, the sealing device is arranged between the rotating shaft and the shaft hole walls close to two ends of the shaft seat respectively, the sealing ring and the opening sliding shaft sleeve are installed on the rotating shaft, the sliding shaft sleeve is located outside the sealing ring, when the rotating shaft rotates, the rotating shaft drives the sealing ring and the opening sliding shaft sleeve to rotate together, and an oil cavity is formed between the rotating shaft, the shaft seat and the two opening sliding shaft sleeves.
2. A sealing device for a low speed rotating shaft as claimed in claim 1, wherein: the opening part of the opening sliding shaft sleeve comprises an arc inner baffle and an arc outer baffle, and the arc inner baffle and the arc outer baffle are overlapped and lapped, and a slit is arranged between the arc inner baffle and the arc outer baffle.
3. A sealing device for a low speed rotating shaft as claimed in claim 2, wherein: the inner angle of the arc inner baffle is set to be a chamfer angle, and the outer angle of the arc outer baffle is set to be a chamfer angle.
4. A sealing device for a low speed rotating shaft as claimed in claim 2, wherein: and a gap between the arc-shaped inner baffle and the arc-shaped outer baffle is Z-shaped when seen from the end part of the opening sliding shaft sleeve.
5. A sealing device for a low speed rotating shaft as claimed in claim 1, wherein: the opening of the opening sliding shaft sleeve is formed by processing through a linear cutting process.
6. A sealing device for a low speed rotating shaft as claimed in claim 1, wherein: the gap fit of H7/g6 is adopted between the opening sliding shaft sleeve and the shaft hole wall of the shaft seat.
7. A sealing device for a low speed rotating shaft as claimed in claim 1, wherein: the rotary shaft is provided with a sealing ring groove, and the sealing ring is arranged at the sealing ring groove.
8. A sealing device for a low speed rotating shaft as claimed in claim 1, wherein: the rotary shaft and the shaft seat are further provided with limiting devices for preventing the sealing devices from falling out, the sealing devices comprise first sealing devices and second sealing devices, the limiting devices comprise positioning spigots positioned on the rotary shaft and upper shaft shells sleeved outside the rotary shaft, the positioning spigots limit the first sealing devices to move downwards, and the upper shaft shells limit the opening sliding shaft sleeves to move upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321444114.6U CN220168564U (en) | 2023-06-07 | 2023-06-07 | Sealing device of low-speed rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321444114.6U CN220168564U (en) | 2023-06-07 | 2023-06-07 | Sealing device of low-speed rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220168564U true CN220168564U (en) | 2023-12-12 |
Family
ID=89056954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321444114.6U Active CN220168564U (en) | 2023-06-07 | 2023-06-07 | Sealing device of low-speed rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220168564U (en) |
-
2023
- 2023-06-07 CN CN202321444114.6U patent/CN220168564U/en active Active
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