CN219888673U - Main shaft with seal structure - Google Patents
Main shaft with seal structure Download PDFInfo
- Publication number
- CN219888673U CN219888673U CN202320466244.3U CN202320466244U CN219888673U CN 219888673 U CN219888673 U CN 219888673U CN 202320466244 U CN202320466244 U CN 202320466244U CN 219888673 U CN219888673 U CN 219888673U
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- CN
- China
- Prior art keywords
- sealing
- end cover
- spindle
- sealing ring
- seal structure
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 162
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004519 grease Substances 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Abstract
The utility model discloses a main shaft with a sealing structure, and belongs to the technical field of processing machine tool equipment. The utility model relates to a main shaft with a sealing structure, which comprises a shaft core, a shaft sleeve and an end cover, wherein the shaft core and the shaft sleeve are rotatably connected through a bearing; the outer side of the end cover is connected with a sealing ring, the end part of the shaft core is connected with a water throwing disc, and the water throwing disc is positioned at the outer side of the sealing ring; a first sealing structure is formed between the sealing ring and the end cover, a second sealing structure is formed between the end cover and the water throwing disc, the second sealing structure is located on the outer side of the first sealing structure, and sealing performance of the sealing structure is improved through mechanical sealing between the first sealing structures and air curtain sealing of the second sealing structure.
Description
Technical Field
The utility model relates to the technical field of processing machine tool equipment, in particular to a main shaft with a sealing structure.
Background
In the related art, since a large amount of fluid grease is contained inside a bearing, the bearing is sealed in order to prevent leakage of the grease during operation of the bearing, which is the beginning of bearing sealing. Later in production and life, bearings are often found to be used in highly contaminated, dust and humid environments, and contaminants can cause wear of the bearings and moisture can rust the bearings, so sealing plays an increasingly important role therein.
From the contact aspect, the seal is largely divided into two types, contact and non-contact. The non-contact type seal is adopted, and the sealing ring is not in direct contact with the rolling body and is filled with lubricant, so that the non-contact type seal is more suitable for a high-rotation-speed scene; the contact seal is directly pressed on the shaft, the tightness is better, but the friction moment and the temperature rise are higher due to the direct contact, in addition, the type of the contact seal determines the maximum allowable rotating speed of the sealing part due to the contact rotation of the lip part and the shaft, and the larger the contact surface is, the lower the rotating speed is, the higher the rotating speed is, and the sealing failure can be caused.
For example, chinese patent publication No. CN109797746a discloses a bearing sealing structure including a lower cover, a locking member, and a protective cover, and an electric spindle including the sealing structure; the locking piece is connected with the protective cover to form a rotating assembly, and a clearance channel is arranged between the lower cover and the rotating assembly; the lower cover is provided with a plurality of inclined channels, the inclined channels extend towards the side close to the second side surface, the side close to the second side surface of the inclined channels is provided with a first air outlet, and the first air outlet is communicated with the clearance channel; the rotating assembly is provided with a chute, the chute is provided with a notch and a side groove surface, the side groove surface extends obliquely towards the direction approaching the protective cover, and the notch is communicated with the clearance channel.
However, the sealed air passage air inlet of the above proposal is arranged radially. On the one hand, after the high-pressure gas is blown in, most of the high-pressure gas can flow outwards along the axial direction of the main shaft and leave the main shaft, and a small part of the high-pressure gas can flow inwards along the axial direction of the main shaft and blow towards the bearing, so that lubricating grease in the bearing is more easily dried; on the other hand, under the poor condition of main shaft operating mode, high-pressure gas still can carry moisture to blow to the bearing, destroys the lubrication function of lubricating grease, has improved bearing corrosion, scaling up's possibility simultaneously. Both of the above conditions can reduce the service life of the bearing.
Disclosure of Invention
The utility model aims to overcome the defect that the service life of a bearing is lower due to poor sealing effect of a sealing structure in the prior art, and provides a main shaft with the sealing structure.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
the utility model relates to a main shaft with a sealing structure, which comprises a shaft core, a shaft sleeve and an end cover, wherein the shaft core and the shaft sleeve are rotatably connected through a bearing; the outer side of the end cover is connected with a sealing ring, the end part of the shaft core is connected with a water throwing disc, and the water throwing disc is positioned at the outer side of the sealing ring; a first sealing structure is formed between the sealing ring and the end cover, a second sealing structure is formed between the end cover and the water throwing disc, and the second sealing structure is located on the outer side of the first sealing structure.
Further, a third sealing structure is formed among the shaft core, the shaft sleeve and the end cover, and the third sealing structure is positioned on the inner side of the first sealing structure.
Further, a first sealing element and a second sealing element are arranged in the shaft sleeve, the second sealing element is sleeved on the shaft core, the first sealing element is sleeved on the second sealing element, and the outer ring of the first sealing element is in contact with the inner side of the shaft sleeve 200 to form the third sealing structure.
Further, a plurality of grooves are formed in the inner side of the end cover, the grooves are formed in the circumferential direction, a plurality of protrusions are formed in the second sealing piece, and the protrusions on the second sealing piece are matched with the grooves in the end cover to form the third sealing structure.
Further, a first air channel is formed in the shaft sleeve, a second air channel is formed in the end cover, the second air channel is communicated with the first air channel, and high-pressure gas is blown out of the second air channel, passes through a gap between the end cover and the sealing ring, and is blown out of a gap between the water throwing disc and the sealing ring.
Further, the second air duct comprises an axial air duct, a radial air duct and a circumferential air duct which are sequentially communicated, the axial air duct is communicated with the first air duct, and the Zhou Xiangfeng duct surrounds the sealing ring.
Further, a sealing groove and a containing groove are sequentially formed in the outer side of the end cover along the axial direction of the end cover, and the water throwing disc is contained in the containing groove; the groove wall of the sealing groove is provided with a plurality of first sealing teeth, the first sealing teeth are equidistantly arranged around the circumference of the sealing ring, and the sealing ring is provided with second sealing teeth matched with the first sealing teeth; when the sealing ring is connected in the end cover, the second sealing teeth are filled in gaps between two adjacent first sealing teeth.
Further, the number of the first seal teeth is between 100 and 300.
Further, a first inclined plane is formed in the outer side of the accommodating groove, and a second inclined plane in clearance fit with the first inclined plane is formed in the outer side of the water throwing disc.
Further, the inclination of the first inclined plane is the same as that of the second inclined plane, and an angle formed between the first inclined plane and the axial direction of the shaft sleeve is 30-60 degrees.
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
(1) The utility model relates to a main shaft with a sealing structure, which comprises a shaft core, a shaft sleeve and an end cover, wherein the shaft core and the shaft sleeve are rotatably connected through a bearing; the outer side of the end cover is connected with a sealing ring, the end part of the shaft core is connected with a water throwing disc, and the water throwing disc is positioned at the outer side of the sealing ring; a first sealing structure is formed between the sealing ring and the end cover, a second sealing structure is formed between the end cover and the water throwing disc, the second sealing structure is located on the outer side of the first sealing structure, and sealing performance of the sealing structure is improved through mechanical sealing between the first sealing structures and air curtain sealing of the second sealing structure.
(2) According to the utility model, the first air channel is formed in the shaft sleeve, the second air channel is formed in the end cover and is communicated with the first air channel, and high-pressure gas is blown out from the second air channel, passes through the gap between the end cover and the sealing ring and is blown out from the gap between the water throwing disc and the sealing ring, and the high-pressure gas blown out from the second air channel is directly blown out from the gap between the end cover and the sealing ring and the gap between the water throwing disc and the sealing ring, so that the high-pressure gas cannot be blown to the bearing, the lubricating grease of the bearing is prevented from being blown dry, and the water and air carried by the high-pressure gas are prevented from being blown to the bearing, so that the service life of the bearing is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of a spindle configuration of the present utility model;
FIG. 2 is a schematic structural view of a seal structure of the present utility model;
FIG. 3 is a schematic diagram of the structure of the first air passage and the second air passage according to the present utility model;
FIG. 4 is a schematic view of the end cap of the present utility model;
FIG. 5 is a schematic view of a first air passage according to the present utility model;
FIG. 6 is a schematic view of a seal ring according to the present utility model;
FIG. 7 is a schematic view of a water slinger according to the present utility model;
FIG. 8 is a schematic diagram of the structure of the second inclined plane in the present utility model.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
The present embodiment provides a main shaft, which includes a shaft core 100, a shaft sleeve 200 and an end cover 300, and a plurality of sealing structures are disposed between the shaft core 100, the shaft sleeve 200 and the end cover 300. More specifically, an end of the sleeve 200 may be provided with an end cap 300, and an end of the shaft core 100 may be provided to penetrate the end cap 300; the outside of the end cap 300 may be connected with a sealing ring 400, the end of the shaft core 100 may be connected with a water-fling disc 500, and the water-fling disc 500 may be located outside the sealing ring 400. A first sealing structure is formed between the sealing ring and the end cover, a second sealing structure is formed between the end cover and the water throwing disc, and the second sealing structure is located outside the first sealing structure.
In order to further prevent high pressure gas from blowing toward the bearing 600, the shaft core 100, the shaft sleeve 200 and the end cap 300 may be further provided with a third sealing structure provided at the inner end of the end cap 300 at the outer end of the bearing 600. Specifically, referring to fig. 1, a first sealing member 210 and a second sealing member 220 may be disposed in the shaft sleeve 200, the second sealing member 220 is sleeved on the shaft core 100, the first sealing member 210 is sleeved on the second sealing member 220, and an outer ring of the first sealing member 210 contacts with an inner side of the shaft sleeve 200; the inner side of the end cover 300 is provided with a plurality of grooves which are formed in the circumferential direction, the second sealing element 220 is provided with a plurality of protrusions, and the protrusions on the second sealing element 220 are matched with the grooves on the end cover 300 to form a labyrinth-shaped sealing structure.
The first sealing structure and the second sealing structure may be disposed between the shaft core 100, the shaft sleeve 200 and the end cap 300 of the main shaft, for sealing a gap between the shaft core 100, the shaft sleeve 200 and the end cap 300, thereby preventing the lubricating grease on the bearing 600 between the shaft core 100 and the shaft sleeve 200 from being dried, and further improving the service life of the bearing 600.
Specifically, referring to fig. 1 to 3, the shaft core 100 and the shaft sleeve 200 may be rotatably connected through a bearing 600, specifically, a bearing inner ring 620 is disposed on the shaft core 100, a bearing outer ring 610 is disposed on the shaft sleeve 200, and rotatable connection is achieved through cooperation of the bearing outer ring 610 and the bearing inner ring 620. The end of the sleeve 200 may be provided with an end cap 300, and the end of the shaft core 100 may be provided to penetrate the end cap 300; the outside of the end cap 300 may be connected with a sealing ring 400, the end of the shaft core 100 may be connected with a water-fling disc 500, and the water-fling disc 500 may be located outside the sealing ring 400.
The shaft sleeve 200 can be provided with a first air duct 230, the end cover 300 can be provided with a second air duct 340, the second air duct 340 can be communicated with the first air duct 230, and high-pressure gas can be blown out from the second air duct 340, firstly through a gap between the end cover 300 and the sealing ring 400 and then blown out from a gap between the water throwing disc 500 and the sealing ring 400.
Therefore, the sealing performance of the main shaft is improved through the mechanical sealing of the first sealing structure and the air curtain sealing of the second sealing structure; in addition, the high-pressure gas blown out by the second air duct 340 is directly blown out from the gap between the end cover 300 and the sealing ring 400 and the gap between the water throwing disc 500 and the sealing ring 400, so that the high-pressure gas cannot be blown to the bearing 600, the lubricating grease of the bearing 600 is prevented from being blown to the bearing 600, and the water carried by the high-pressure gas is also prevented from being blown to the bearing 600, so that the service life of the bearing 600 is greatly prolonged.
Referring to fig. 4, as a specific embodiment, the end cap 300 may include an end cap body 310, and the end cap body 310 may be provided with a second air duct 340. Specifically, referring to fig. 5, the second air duct 340 may include an axial air duct 341, a radial air duct 342, and a circumferential air duct 343 that are sequentially communicated, the axial air duct 341 is communicated with the first air duct 230, and the circumferential air duct 343 is disposed around the sealing ring 400. After the high-pressure gas is blown in from the first air channel, the high-pressure gas passes through the axial air channel 341 and the radial air channel 342 in sequence, is blown in Zhou Xiangfeng channels 343, and is blown in from the circumferential air channel 343 into the gap between the sealing ring 400 and the end cover 300.
With continued reference to fig. 5, more specifically, the outer side of the end cover 300 may be sequentially provided with a sealing groove 320 and a receiving groove 330 along the axial direction of the end cover 300, and the water-throwing disc 500 is received in the receiving groove 330; the groove wall of the sealing groove 320 may be provided with a plurality of first sealing teeth 321, and the plurality of first sealing teeth 321 may be equidistantly disposed around the circumference of the sealing ring 400. The seal ring 400 may include a seal ring body 410, and the seal ring body 410 may be provided with second seal teeth 420 that cooperate with the first seal teeth 321; when the seal ring 400 may be coupled within the end cap 300, the second seal teeth 420 may fill in the gaps between adjacent two first seal teeth 321.
As a further optimization of this embodiment, referring to fig. 6, the number of first seal teeth 321 may be between 100 and 300, and the number of second seal teeth 420 may be the same as the number of first seal teeth 321. Therefore, when the number of the first seal teeth 321 is between 100 and 300, the second seal teeth 420 are disposed around the seal ring 400 at a higher density, and at the same time, the first seal teeth 321 and the second seal teeth 420 are uniformly disposed around the end cover 300, so that high-pressure gas can be uniformly blown out from the second air duct 340 and out from the gap between the water slinger 500 and the seal ring 400, thereby improving the sealing effect of the air curtain seal.
As still further optimization, the seal ring 400 and the end cover 300 may be in interference fit, so that a tight fit is formed between the first seal tooth 321 and the second seal tooth 420, and when the high-pressure gas blows between the first seal tooth 321 and the second seal tooth 420, the pressure of the high-pressure gas is further increased, so that the strength of the air curtain is improved, and the sealing effect is improved.
In addition, the outer end of the first sealing tooth 321 may extend to the junction of the sealing groove 320 and the receiving groove 330, and the inner end of the first sealing tooth 321 is located within the axial range of the Zhou Xiangfeng channel 343, so that high-pressure gas is blown out from between the first sealing tooth 321 and the second sealing tooth 420 without being blown into the inside of the sleeve 200 from between the sealing ring 400 and the end cap 300 in a tight fit condition of the sealing ring 400 and the end cap 300, thereby functioning as a seal.
Referring to fig. 7, as a specific embodiment of the water slinging disc 500, the water slinging disc 500 may include a water slinging disc body 510, at least two connection lugs 520 may be provided on the water slinging disc body 510, at least two connection lugs 520 may be equally spaced around the circumference of the water slinging disc 500, connection holes 521 may be provided on the connection lugs 520, and the water slinging disc 500 may be connected to the shaft core 100 through the connection holes 521.
As a further optimization, the outer side of the accommodating groove 330 may be provided with a first inclined plane 331, and the outer side of the water throwing disc 500 may be provided with a second inclined plane 511 in clearance fit with the first inclined plane 331. The inclination of the first inclined surface 331 may be the same as that of the second inclined surface 511, and the first inclined surface 331 may form an angle of 30 ° to 60 ° with the axial direction of the sleeve 200.
Therefore, when the shaft core 100 and the shaft sleeve 200 rotate at a relatively high speed, after the high-pressure gas blows on the first inclined surface 331, the high-pressure gas forms a conical surface air curtain, and moisture carried in the high-pressure gas is quickly thrown away from the end cover 300, so that the sealing effect of the air curtain sealing is further improved.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model. The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. A main shaft with seal structure, its characterized in that: the shaft sleeve is rotatably connected with the shaft core through a bearing, the end part of the shaft sleeve is provided with an end cover, and the end part of the shaft core penetrates out of the end cover to be arranged; the outer side of the end cover is connected with a sealing ring, the end part of the shaft core is connected with a water throwing disc, and the water throwing disc is positioned at the outer side of the sealing ring; a first sealing structure is formed between the sealing ring and the end cover, a second sealing structure is formed between the end cover and the water throwing disc, and the second sealing structure is located on the outer side of the first sealing structure.
2. A spindle with seal structure according to claim 1, wherein: and a third sealing structure is formed among the shaft core, the shaft sleeve and the end cover, and is positioned on the inner side of the first sealing structure.
3. A spindle with seal structure according to claim 2, wherein: the novel sealing structure is characterized in that a first sealing element and a second sealing element are arranged in the shaft sleeve, the second sealing element is sleeved on the shaft core, the first sealing element is sleeved on the second sealing element, and the outer ring of the first sealing element is contacted with the inner side of the shaft sleeve to form the third sealing structure.
4. A spindle with seal structure according to claim 3, wherein: the inner side of the end cover is provided with a plurality of grooves which are formed in the circumferential direction, the second sealing piece is provided with a plurality of protrusions, and the protrusions on the second sealing piece are matched with the grooves on the end cover.
5. A spindle with seal structure according to claim 1, wherein: the shaft sleeve is provided with a first air channel, the end cover is provided with a second air channel, the second air channel is communicated with the first air channel, and high-pressure gas is blown out from the second air channel, passes through a gap between the end cover and the sealing ring, and is blown out from a gap between the water throwing disc and the sealing ring.
6. A spindle with seal structure according to claim 5, wherein: the second air duct comprises an axial air duct, a radial air duct and a circumferential air duct which are sequentially communicated, the axial air duct is communicated with the first air duct, and the Zhou Xiangfeng duct surrounds the sealing ring.
7. A spindle with seal structure according to claim 6, wherein: the outer side of the end cover is sequentially provided with a sealing groove and a containing groove along the axial direction of the end cover, and the water throwing disc is contained in the containing groove; the groove wall of the sealing groove is provided with a plurality of first sealing teeth, the first sealing teeth are equidistantly arranged around the circumference of the sealing ring, and the sealing ring is provided with second sealing teeth matched with the first sealing teeth; when the sealing ring is connected in the end cover, the second sealing teeth are filled in gaps between two adjacent first sealing teeth.
8. A spindle with seal structure according to claim 7, wherein: the number of the first seal teeth is between 100 and 300.
9. A spindle with seal structure according to claim 7, wherein: the outer side of the accommodating groove is provided with a first inclined plane, and the outer side of the water throwing disc is provided with a second inclined plane which is in clearance fit with the first inclined plane.
10. A spindle with seal structure according to claim 9, wherein: the inclination of the first inclined plane is the same as that of the second inclined plane, and the angle formed between the first inclined plane and the axial direction of the shaft sleeve is 30-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320466244.3U CN219888673U (en) | 2023-03-13 | 2023-03-13 | Main shaft with seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320466244.3U CN219888673U (en) | 2023-03-13 | 2023-03-13 | Main shaft with seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219888673U true CN219888673U (en) | 2023-10-24 |
Family
ID=88403668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320466244.3U Active CN219888673U (en) | 2023-03-13 | 2023-03-13 | Main shaft with seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219888673U (en) |
-
2023
- 2023-03-13 CN CN202320466244.3U patent/CN219888673U/en active Active
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