CN204387329U - The air-tight structure of main shaft - Google Patents
The air-tight structure of main shaft Download PDFInfo
- Publication number
- CN204387329U CN204387329U CN201420852430.1U CN201420852430U CN204387329U CN 204387329 U CN204387329 U CN 204387329U CN 201420852430 U CN201420852430 U CN 201420852430U CN 204387329 U CN204387329 U CN 204387329U
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- CN
- China
- Prior art keywords
- seal sleeve
- inner seal
- air drain
- ring air
- main shaft
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Abstract
The air-tight structure of main shaft, comprise axle core, outer seal sleeve, inner seal sleeve, outer seal sleeve is provided with the gas-entered passageway be communicated with the high-pressure air source in the external world, a first ring air drain be communicated with gas-entered passageway is provided with between the outer side wall of inner seal sleeve and outer seal sleeve, be provided with one second ring air drain between the top end of inner seal sleeve and outer seal sleeve, inner seal sleeve be evenly distributed with multiple tap hole, one end connection first ring air drain of the plurality of tap hole, the other end are communicated with the second ring air drain; Inner seal sleeve is evenly distributed with multiple pore, pore extends downward the lower end surface of inner seal sleeve by the second ring air drain, and inner seal sleeve lower end surface is provided with the circular groove multiple pore underpart being run through connection.The utility model enables pressurized gas be evenly distributed in the periphery of axle core, forms equally distributed high pressure sealing compression ring, thus improves the sealing effect of main shaft.
Description
Technical field
The utility model relates to a kind of air-tight structure of main shaft.
Background technique
The axle core that existing main shaft comprises body, utilizes bearing hinge joint in body, the end cap that the front end of axle core is fixing from body front end passes and is connected with handle of a knife, owing to there is gap between main shaft and end cap, carrying out adding man-hour for part, impurity can enter into main shaft inside from gap, especially enter in bearing, affect normal work and the working life of main shaft.In order to prevent impurity from entering, traditional way is the sealing joint strip of mounting strap ear on end cap or bearing support, and the ear of sealing joint strip contacts with axle core outer surface, although it can play the effect of sealing, owing to there is contact friction, increases the energy consumption of main shaft.
In order to overcome the defect of above-mentioned conventional seals mode, present stage, some main shafts adopt air-tight structure to prevent impurity from entering main shaft inside, particularly, at main shaft outer installment stuffing box gland, gas channel offered by stuffing box gland, utilize pressurized gas to blow to axle core side, realize hermetic seal, but, existing air-tight structure in use, because structure is reasonable not, cause gas can not be distributed in axle core periphery uniformly, the effect of hermetic seal is not ideal enough.
Model utility content
For the deficiencies in the prior art, the purpose of this utility model is intended to the air-tight structure providing a kind of main shaft, and pressurized gas can be uniformly distributed the periphery with axle core by it, improve the sealing effect of main shaft.
For achieving the above object, the utility model adopts following technological scheme:
The air-tight structure of main shaft, comprise axle core, be socketed on axle core outside and with the outer seal sleeve of axle core Spielpassung, and between outer seal sleeve and axle core and with the inner seal sleeve of axle core Spielpassung, outer seal sleeve is provided with the gas-entered passageway be communicated with the high-pressure air source in the external world, a first ring air drain be communicated with gas-entered passageway is provided with between the outer side wall of inner seal sleeve and outer seal sleeve, one second ring air drain is provided with between the top end of inner seal sleeve and outer seal sleeve, inner seal sleeve is evenly distributed with multiple tap hole, one end of the plurality of tap hole is communicated with first ring air drain, the other end is communicated with the second ring air drain, inner seal sleeve is evenly distributed with multiple pore, pore extends downward the lower end surface of inner seal sleeve by the second ring air drain, and inner seal sleeve lower end surface is provided with the circular groove multiple pore underpart being run through connection.
The cross section of circular groove is triangular in shape.
First ring air drain is surrounded by the first groove that the inwall of outer seal sleeve and inner seal sleeve outer side wall are offered; Second ring air drain is surrounded by the second groove that the inwall of outer seal sleeve and inner seal sleeve top end are offered.
The top end of inner seal sleeve is provided with a flange, and the inwall of outer seal sleeve is provided with one for holding the receiving groove of flange, and inner seal sleeve and outer seal sleeve are bolted to connection.
The beneficial effects of the utility model are:
Compared to prior art, the utility model, owing to repeatedly being circulated by pressurized gas, enables pressurized gas be evenly distributed in the periphery of axle core, forms equally distributed high pressure sealing compression ring, thus improves the sealing effect of main shaft.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the zoomed-in view at A place in Fig. 1;
Fig. 3 is the zoomed-in view at B place in Fig. 1;
Wherein: 10, outer seal sleeve; 11, gas-entered passageway; 12, receiving groove; 20, inner seal sleeve; 21, first ring air drain; 22, the second ring air drain; 23, pore; 24, circular groove; 25, tap hole; 26, flange; 30, axle core.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further:
As shown in Figure 1, 2, 3, for the air-tight structure of a kind of main shaft of the utility model, it comprises axle core 30, outer seal sleeve 10 and inner seal sleeve 20, wherein, outer seal sleeve 10 be socketed in axle core 30 outside and with axle core 30 Spielpassung, guarantee that the rotation of axle core 30 is by the interference of outer seal sleeve 10, inner seal sleeve 20 between outer seal sleeve 10 and axle core 30 and with axle core 30 Spielpassung, equally, guarantee that axle core 30 rotates not by the interference of inner seal sleeve 20; Outer seal sleeve 10 is provided with the gas-entered passageway 11 be communicated with the high-pressure air source in the external world; Be provided with a first ring air drain 21 be communicated with gas-entered passageway 11 between the outer side wall of inner seal sleeve 20 and outer seal sleeve 10, between the top end of inner seal sleeve 20 and outer seal sleeve 10, be provided with one second ring air drain 22; Inner seal sleeve 20 is evenly distributed with multiple tap hole 25, one end connection first ring air drain 21 of the plurality of tap hole 25, the other end are communicated with the second ring air drain 22; Inner seal sleeve 20 is evenly distributed with multiple pore 23, pore 23 extends downward the lower end surface of inner seal sleeve 20 by the second ring air drain 22, and inner seal sleeve 20 lower end surface is provided with the circular groove 24 multiple pore 23 underpart being run through connection.
The utility model in use, the pressurized gas in the external world are introduced into first ring air drain 21 by gas-entered passageway 11, pressurized gas are uniformly distributed to multiple tap hole 25 and enter into the second ring air drain 22 after first ring air drain 21 once circulates, pressurized gas are uniformly distributed to multiple pore 23 again after confluxing and circulate in the second ring air drain 22 inside, afterwards, carried by multiple pore 23 respectively and deliver the gas to circular groove 24, final form high pressure compression ring in circular groove 24 inner loop, then form hermetic seal at the periphery of axle core 30.In the utility model, owing to repeatedly being circulated by pressurized gas, enable pressurized gas be evenly distributed in the periphery of axle core 30, form equally distributed high pressure sealing compression ring.
The cross section of above-mentioned circular groove 24 is set to triangle, makes circular groove 24 form a balancing slit, strengthens sealing effect further.
For the ease of processing, above-mentioned first ring air drain 21 is surrounded by the first groove that the inwall of outer seal sleeve 10 and inner seal sleeve 20 outer side wall are offered; Second ring air drain 22 is surrounded by the second groove that the inwall of outer seal sleeve 10 and inner seal sleeve top 20 end face are offered; So, only need inner seal sleeve 20 outside to offer groove, after inner seal sleeve 20 and outer seal sleeve 10 being assembled, as long as at groove arranged outside seal ring, can ensure that first ring air drain 21 and the second ring air drain 22 are in sealing state.
For the ease of positioning when assembling, the top end of inner seal sleeve 20 is provided with a flange 26, the inwall of outer seal sleeve 10 is provided with one for holding the receiving groove 12 of flange 26, inner seal sleeve 20 and outer seal sleeve 10 are bolted to connection, when assembling, only need directed flange 26 and receiving groove 12, utilize bolt to carry out locking.
To one skilled in the art, according to technological scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection domain of the utility model claim.
Claims (4)
1. the air-tight structure of main shaft, it is characterized in that, comprise axle core, be socketed on axle core outside and with the outer seal sleeve of axle core Spielpassung, and between outer seal sleeve and axle core and with the inner seal sleeve of axle core Spielpassung, outer seal sleeve is provided with the gas-entered passageway be communicated with the high-pressure air source in the external world, a first ring air drain be communicated with gas-entered passageway is provided with between the outer side wall of inner seal sleeve and outer seal sleeve, one second ring air drain is provided with between the top end of inner seal sleeve and outer seal sleeve, inner seal sleeve is evenly distributed with multiple tap hole, one end of the plurality of tap hole is communicated with first ring air drain, the other end is communicated with the second ring air drain, inner seal sleeve is evenly distributed with multiple pore, pore extends downward the lower end surface of inner seal sleeve by the second ring air drain, and inner seal sleeve lower end surface is provided with the circular groove multiple pore underpart being run through connection.
2. the air-tight structure of main shaft as claimed in claim 1, it is characterized in that, the cross section of circular groove is triangular in shape.
3. the air-tight structure of main shaft as claimed in claim 1, is characterized in that, first ring air drain is surrounded by the first groove that the inwall of outer seal sleeve and inner seal sleeve outer side wall are offered; Second ring air drain is surrounded by the second groove that the inwall of outer seal sleeve and inner seal sleeve top end are offered.
4. the air-tight structure of main shaft as claimed in claim 1, it is characterized in that, the top end of inner seal sleeve is provided with a flange, and the inwall of outer seal sleeve is provided with one for holding the receiving groove of flange, and inner seal sleeve and outer seal sleeve are bolted to connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852430.1U CN204387329U (en) | 2014-12-26 | 2014-12-26 | The air-tight structure of main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852430.1U CN204387329U (en) | 2014-12-26 | 2014-12-26 | The air-tight structure of main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204387329U true CN204387329U (en) | 2015-06-10 |
Family
ID=53360051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420852430.1U Active CN204387329U (en) | 2014-12-26 | 2014-12-26 | The air-tight structure of main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204387329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538763A (en) * | 2018-12-28 | 2019-03-29 | 广州市威嘉机床有限公司 | A kind of spindle nose gas curtain seals structure |
| CN116587014A (en) * | 2023-07-18 | 2023-08-15 | 通用技术集团机床工程研究院有限公司 | Air sealing assembly for air-floating main shaft and ultra-precise machine tool |
-
2014
- 2014-12-26 CN CN201420852430.1U patent/CN204387329U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538763A (en) * | 2018-12-28 | 2019-03-29 | 广州市威嘉机床有限公司 | A kind of spindle nose gas curtain seals structure |
| CN116587014A (en) * | 2023-07-18 | 2023-08-15 | 通用技术集团机床工程研究院有限公司 | Air sealing assembly for air-floating main shaft and ultra-precise machine tool |
| CN116587014B (en) * | 2023-07-18 | 2023-10-31 | 通用技术集团机床工程研究院有限公司 | Air sealing assembly for air-floating main shaft and ultra-precise machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |