CN210790537U - Electric main shaft air seal structure for numerically controlled grinder - Google Patents
Electric main shaft air seal structure for numerically controlled grinder Download PDFInfo
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- CN210790537U CN210790537U CN201921933615.4U CN201921933615U CN210790537U CN 210790537 U CN210790537 U CN 210790537U CN 201921933615 U CN201921933615 U CN 201921933615U CN 210790537 U CN210790537 U CN 210790537U
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- inner ring
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Abstract
The electric spindle gas seal structure for the numerical control grinding machine comprises a front cover, wherein a radial gas passage is formed in the front cover, the gas seal structure further comprises a gas seal cover, the gas seal cover consists of an outer ring piece and an inner ring piece fixed together with the outer ring piece, the inner ring piece is provided with an axial gas hole and a radial gas hole which are communicated with each other, an annular groove is formed in the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring, a plurality of radial gas distribution blind holes are formed in the peripheral surface of the inner ring piece, small holes communicated to the outer surface of the inner ring piece in the axial direction are formed in the bottoms of the gas distribution blind holes, a plurality of labyrinth seal annular grooves are formed in the surface, close to the center, of the inner ring, a seal cover is fixedly connected to the spindle through threads, and a labyrinth seal ring. The structure perfectly solves the problem of electric spindle sealing on the high-precision full-automatic grinding machine.
Description
Technical Field
The utility model relates to an electricity main shaft, in particular to last electricity main shaft's of numerically control grinder atmoseal structure belongs to mechanical technical field.
Background
The totally-enclosed automatic grinding machine is formed by a double-end permanent magnet main shaft used on a numerical control grinding machine, the working environment of the machine is very severe, the sealing requirement is particularly high, and a lot of problems in use are found to be related to sealing.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned problem that exists on present main shaft for the grinding machine, provide a double-end electricity main shaft atmoseal structure for numerically control grinder.
In order to realize the purpose of the utility model, the following technical proposal is adopted: the double-head electric spindle gas seal structure for the numerical control grinding machine comprises a front cover, wherein a radial gas passage is formed in the front cover, an axial gas passage is communicated with the radial gas passage, the gas seal structure further comprises a gas seal cover, the gas seal cover is fixedly connected to the front cover, the gas seal cover consists of an outer ring plate and an inner ring plate fixed together with the outer ring plate, an axial gas hole and a radial gas hole which are communicated are formed in the inner ring plate, the axial gas hole in the inner ring is communicated with the axial gas passage in the front cover, an annular groove is formed in the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring, the annular groove is communicated with the radial gas hole, the radial gas hole is a blind hole inwards in the radial direction, a plurality of radial gas distribution blind holes are formed in the peripheral surface of the inner ring plate, a small hole which is communicated to the outer surface of the inner ring plate in the axial direction is formed in the bottom of the gas distribution blind hole, the small hole is positioned in the sealing ring groove, the main shaft is fixedly connected with a sealing cover through threads, the sealing cover is positioned in the inner ring, the inner surface of the sealing cover is provided with a labyrinth sealing ring which is complementary with the labyrinth sealing ring grooves, a gap is formed between the sealing ring and the inner ring, and gas blown out of the small hole is blown out of the gap.
Further, the method comprises the following steps of; the number of the air distribution blind holes is 6.
Further, the method comprises the following steps of; the diameter of the small hole is 1-1.5 mm.
Further, the method comprises the following steps of; the clearance between the radial minimum part of the sealing cover and the radial maximum part of the inner ring is 0.3-0.4 mm.
The utility model discloses an actively beneficial technological effect lies in: firstly, the structure adopts multi-point gas distribution in the circumferential direction, so that the gas distribution is more uniform; and secondly, the air outlet part directly blows air in the radial direction opposite to the main shaft, but blows air in the axial direction to the labyrinth sealing ring of the sealing cover, the diameter of the sealing cover is larger than that of the main shaft, and then the convex-concave deformation of the labyrinth sealing ring can better realize the uniform distribution of sealing air in the rotating process, the air blowing direction is in the axial direction, and the sealing effect generated by the axial air blowing is proved to be far better than that of the radial air blowing by experiments. The structure perfectly solves the problem of electric spindle sealing on the high-precision full-automatic grinding machine.
Drawings
Fig. 1 is a schematic diagram of the present structure in a double-ended electric spindle.
Fig. 2 is a schematic cross-sectional view of the front cover.
Fig. 3 is a schematic cross-sectional view of the air-tight lid.
Fig. 4 is a front-rear direction schematic view of the air-packing cap.
Fig. 5 is a schematic view of a sealing cap.
Detailed Description
In order to explain the utility model more fully, the utility model provides an implementation example. These examples are merely illustrative of the present invention and do not limit the scope of the present invention.
The present invention is further explained in detail with reference to the accompanying drawings, the left and right directions in fig. 1 are the front and back directions of the present application, and the air seal structures at both ends of the double-ended electric spindle in fig. 1 are the same. The various references in the drawings are: 1: a front cover; 101, axial gas passage; 102: a radial gas passage; 2: sealing the cover in air; 3: a sealing cover; 4: an outer ring plate; 5: an inner ring sheet; 6: an annular groove; 61: a vertex line of the annular groove; 7: a radial air hole; 8: an axial air hole; 9: labyrinth sealing ring groove; 10: gas distribution blind holes; 11: a small hole; 12: labyrinth sealing ring.
As shown in the attached drawings, the double-head electric spindle gas seal structure for the numerical control grinding machine comprises a front cover 1, wherein a radial gas passage 102 is formed in the front cover, an axial gas passage 101 is communicated with the radial gas passage, the axial gas passage is also formed in the front cover, the gas seal structure also comprises a gas seal cover 2, the gas seal cover is fixedly connected on the front cover 1, the gas seal cover consists of an outer ring piece 4 and an inner ring piece 5 fixed with the outer ring piece, the outer ring piece and the inner ring piece can be tightly combined together by hot pressing, the combination of the outer ring piece and the inner ring piece aims to process a ring-shaped groove, the inner ring piece is provided with an axial gas hole 8 and a radial gas hole 7 which are communicated, the axial gas hole 8 in the inner ring is communicated with the axial gas passage 101 in the front cover, the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring is provided with a ring-shaped groove 6, and the ring-shaped groove, radial air holes are blind holes radially inwards, a plurality of radial air distribution blind holes are formed in the circumferential surface of the inner ring piece, and 10 is an air distribution blind hole, in the embodiment, the number of the air distribution blind holes is 6, as shown in fig. 4, the 6 air distribution blind holes are uniformly distributed, small holes 11 which are axially communicated to the outer surface of the inner ring piece are formed in the bottom of the air distribution blind holes, the diameter of each small hole is 1-1.5mm, a plurality of labyrinth seal annular grooves are formed in the surface, close to the center, of the inner ring piece, as shown in fig. 9, the small holes are located in the seal annular grooves, a seal cover 3 is fixedly connected to the main shaft through threads, the seal cover is located in the inner ring piece 5, and the gap between the radial minimum part of the seal cover and the radial maximum part of the inner ring piece is 0.3-0.; the sealing cover has on its inner surface a labyrinth sealing ring complementary to a plurality of labyrinth sealing ring grooves, as shown at 12, which is integral with the sealing cover with a gap between the sealing ring and the inner ring segment, through which gap the gas blown out from the small hole is blown out.
Among this sealing mechanism, high pressure gas footpath protecgulum gets into radial gas pocket through the axial gas pocket of inner ring piece, because radial gas pocket is inwards for the cecum, so gaseous to the annular groove direction flow, the annular groove actually forms the air chamber, get into in 6 gas distribution blind holes in the annular groove, finally blow off to the labyrinth seal department from the aperture, because sealed lid diameter is big and labyrinth seal ring department shape has the convex-concave, have better carrying effect to gaseous, make sealed gaseous make the upwards distributed evenly that makes, flow in the clearance between sealing ring and the sealed lid, realize good sealed effect. In the research of the applicant, the sealing cover is not adopted, the air distribution blind hole is radially opened, the air is radially blown to the main shaft, the multi-point air distribution is sealed by the rotation of the main shaft, the effect is better than that of single air inlet, but the whole sealing performance is poor. The scheme of the air distribution blind hole and the axial air outlet small hole formed at present (namely the scheme of the application) finds that the sealing performance is the best, can completely meet the use requirement of friction under severe working conditions, and is even superior to the sealing performance of similar products of certain foreign brands (but the price is much cheaper than that of foreign brands).
After the embodiments of the present invention have been described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.
Claims (4)
1. Numerical control is electric main shaft gas seal structure for grinding machine, including the protecgulum, seted up radial gas passage on the protecgulum, the intercommunication has axial gas passage, its characterized in that on the radial gas passage: the air sealing structure also comprises an air sealing cover fixedly connected on the front cover, the air sealing cover consists of an outer ring piece and an inner ring piece fixed together with the outer ring piece, the inner ring piece is provided with an axial air hole and a radial air hole which are communicated, the axial air hole on the inner ring piece is communicated with an axial air passage on the front cover, the outer peripheral surface of the inner ring piece or the inner peripheral surface of the outer ring piece is provided with an annular groove which is communicated with the radial air hole, the radial air hole is a blind hole inwards in the radial direction, the circumferential surface of the inner ring piece is provided with a plurality of radial air distribution blind holes, the bottom of each air distribution blind hole is provided with a small hole which is communicated to the outer surface of the inner ring piece in the axial direction, the surface of the inner ring piece close to the center is provided with a plurality of labyrinth sealing ring grooves, the small hole is positioned at the sealing ring groove, a sealing cover is fixedly connected on, the sealing cover is provided with a labyrinth sealing ring on the inner surface, the labyrinth sealing ring is complementary to a plurality of labyrinth sealing ring grooves, a gap is formed between the sealing ring and the inner ring plate, and gas blown out of the small hole is blown out of the gap.
2. The electric spindle gas seal structure for the numerically controlled grinder as claimed in claim 1, wherein: the number of the air distribution blind holes is 6.
3. The electric spindle gas seal structure for the numerically controlled grinder as claimed in claim 1, wherein: the diameter of the small hole is 1-1.5 mm.
4. The electric spindle gas seal structure for the numerically controlled grinder as claimed in claim 1, wherein: the clearance between the radial minimum part of the sealing cover and the radial maximum part of the inner ring sheet is 0.3-0.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933615.4U CN210790537U (en) | 2019-11-11 | 2019-11-11 | Electric main shaft air seal structure for numerically controlled grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933615.4U CN210790537U (en) | 2019-11-11 | 2019-11-11 | Electric main shaft air seal structure for numerically controlled grinder |
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| Publication Number | Publication Date |
|---|---|
| CN210790537U true CN210790537U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921933615.4U Active CN210790537U (en) | 2019-11-11 | 2019-11-11 | Electric main shaft air seal structure for numerically controlled grinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113427086A (en) * | 2021-06-28 | 2021-09-24 | 津上精密机床（浙江）有限公司 | Direct-drive power head structure, gear hobbing device and tool rest |
-
2019
- 2019-11-11 CN CN201921933615.4U patent/CN210790537U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113427086A (en) * | 2021-06-28 | 2021-09-24 | 津上精密机床（浙江）有限公司 | Direct-drive power head structure, gear hobbing device and tool rest |
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