CN217492704U - Low-temperature-rise high-speed main shaft sealing structure - Google Patents
Low-temperature-rise high-speed main shaft sealing structure Download PDFInfo
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- CN217492704U CN217492704U CN202221573232.2U CN202221573232U CN217492704U CN 217492704 U CN217492704 U CN 217492704U CN 202221573232 U CN202221573232 U CN 202221573232U CN 217492704 U CN217492704 U CN 217492704U
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- main shaft
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Abstract
The utility model discloses a high-speed main shaft seal structure of low temperature rise that low temperature rises, including main shaft, oil blanket and seal cover, the fixed cover of seal cover is established on the main shaft, the front end of main shaft is equipped with sealing member installation boss, and sealing member installation boss is equipped with the annular groove, and the front end of seal cover is equipped with sealed boss, inside sealed boss stretched into the annular groove, the oil blanket inlays to be established in the annular groove, the oil blanket includes that the lower extreme of supporting part, sealing member and sealing, supporting part and sealing links together through the sealing member, and the sealing slope sets up and the upper end of sealing and supports the top with the lateral wall of sealed boss. Compared with the prior art, the utility model discloses can effectively reduce the main shaft when high-speed rotatory and the oil blanket between the frictional force that takes place, prevent to take place the phenomenon that main shaft wearing and tearing and main shaft generate heat.
Description
Technical Field
The utility model relates to a high-speed main shaft technical field, concretely relates to be a high-speed main shaft seal structure of low temperature rise.
Background
In the technical field of numerical control machining, a plurality of cutters are required to be mounted on a turret for alternative machining. The cutter needs to be connected to the cutter tower through a main shaft, and the main shaft is mostly sealed by an oil seal and a labyrinth seal. The existing main shaft sealing structure has the advantages that the oil seal is fixed when the main shaft rotates, the sealing pressure of the oil seal on the main shaft is constant all the time, severe friction can be generated between the oil seal and the inner wall of the main shaft when the main shaft rotates at a high speed, the temperature of the main shaft rises, the outer surface of the main shaft is abraded, the temperature of a cutter tower for fixing the main shaft rises, thermal expansion displacement is generated, the machining precision changes, the size cannot be accurately controlled, the shaft diameter of the outer sealing position is abraded, and the sealing function of the oil seal is disabled.
In order to avoid abrasion of the shaft diameter of the spindle seal, manufacturers generally attach a super-wear-resistant material to the outer surface of the spindle by spraying and electroplating. Although the processing mode can solve the problem of abrasion of the outer surface of the main shaft, the super wear-resistant material is expensive, so that the cost of the main shaft is greatly increased, and the problem of temperature rise of the main shaft cannot be solved.
In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.
Disclosure of Invention
A primary object of the present invention is to provide a high-speed spindle sealing structure with low temperature rise, which can effectively reduce the friction force between the spindle and the oil seal during high-speed rotation, and prevent the spindle from wearing and tearing and the spindle from temperature rise.
In order to achieve the above purpose, the solution of the present invention is:
the utility model provides a high-speed main shaft seal structure of low temperature rise, includes main shaft, oil blanket and seal cover, the fixed cover of seal cover is established on the main shaft, the front end of main shaft is equipped with sealing member installation boss, and sealing member installation boss is equipped with the annular groove, and the front end of seal cover is equipped with sealed boss, sealed boss stretches into inside the annular groove, the oil blanket inlays to be established in the annular groove, the oil blanket includes that the lower extreme of supporting part, sealing member and sealing, supporting part and sealing links together through the sealing member, and the sealing slope sets up and the upper end of sealing supports the top with the lateral wall of sealed boss.
Furthermore, the front side wall of the sealing sleeve is provided with a plurality of first sealing grooves.
Further, a second seal groove is formed between the support portion and the seal portion.
Furthermore, the lateral wall of supporting part is equipped with the oil blanket mounting groove.
Further, the oil seal is made of rubber materials.
Further, still include bearing frame and holding ring, the bearing frame is equipped with the holding chamber of holding bearing, the bearing frame passes through the bearing and connects on the main shaft, the front end and the seal cover fixed connection of bearing frame, the seal cover is equipped with the location boss, the holding ring have with location boss complex positioning groove, location boss and positioning groove clearance fit.
Furthermore, the rear end of the main shaft is sleeved with a spacer sleeve and a locking nut, and the spacer sleeve is arranged between the locking nut and the bearing seat.
After adopting above-mentioned structure, compare with prior art, beneficial effect lies in, this is novel when the main shaft is high-speed rotatory, drives the oil blanket and rotates together. Because the oil seal is made of rubber materials and is a flexible body, the sealing part expands outwards under the action of centrifugal force, the pressure of the oil seal on the main shaft is smaller, when the rotating speed of the main shaft is increased, the sealing part is separated from the mounting boss of the sealing element, and because the sealing part is not in contact with the main shaft part, no friction exists. The phenomenon that the main shaft generates heat and the phenomenon that the main shaft part is abraded due to friction are effectively avoided, and meanwhile, because the main shaft is in a high-speed rotating state, water or other dirt in the main shaft is thrown out by the shaft and cannot enter a sealing part. When the main shaft is in low speed or static state, the sealing part of the oil seal is reset to the initial state and is abutted against the sealing boss, the main shaft is sealed again, and a good static sealing effect is kept.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a partially enlarged view of the area a in fig. 1.
In the figure:
a main shaft-1; a sealing element mounting boss-11; an annular groove-12; oil seal-2; a support portion-21;
an oil seal mounting groove-211; a seal-22; a seal portion-23; a second seal groove-24;
a sealing sleeve-3; a sealing boss-31; a first seal groove-32; positioning a boss-33;
a bearing seat-4; an accommodating cavity-41; positioning ring-5; a positioning groove-51; spacer bush-6;
and (7) locking a nut.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
As shown in fig. 1-2, a high-speed spindle 1 sealing structure comprises a spindle 1, an oil seal 2 and a sealing sleeve 3, wherein the sealing sleeve 3 is fixedly sleeved on the spindle 1, a sealing element mounting boss 11 is arranged at the front end of the spindle 1, and a gap is formed between the rear side wall of the sealing element mounting boss 11 and the front side wall of the sealing sleeve 3. The sealing element mounting boss 11 is provided with an annular groove 12, the front end of the sealing sleeve 3 is provided with a sealing boss 31, and the sealing boss 31 extends into the annular groove 12. The sealing boss 31 is in clearance fit with the main shaft 1 and the sealing element mounting boss 11, so that water and dirt can be thrown out of the sealing part of the main shaft 1 through the fit clearance when the main shaft 1 rotates at a high speed. The upper side wall of the sealing boss 31 is a sealing contact surface. The oil seal 2 is embedded in the annular groove 12, the oil seal 2 comprises a supporting portion 21, a sealing piece 22 and a sealing portion 23, the lower ends of the supporting portion 21 and the sealing portion 23 are connected together through the sealing piece 22, the outer side wall of the supporting portion 21 is in abutting fit with the side wall of the annular groove 12, the sealing portion 23 is obliquely arranged, and the upper end of the sealing portion 23 abuts against the outer side wall of the sealing boss 31, so that sealing of a sealing contact surface is achieved.
Preferably, the front side wall of the sealing sleeve 3 is provided with a plurality of first sealing grooves 32, the first sealing grooves 32 are annularly arranged, and the side wall of the first sealing groove 32 is inclined towards the outside. A second seal groove 24 is formed between the support portion 21 and the seal portion 23, and the opening of the second seal groove 24 faces the outside of the seal attachment boss 11. After adopting above-mentioned structure, when main shaft 1 stopped, sealing 23 supported the top with the lateral wall of sealed boss 31 and sealed, if there is water and dirty entering main shaft 1, can flow into first seal groove 32 and second seal groove 24 earlier, when main shaft 1 began to rotate, water and dirty in first seal groove 32 and the second seal groove 24 can be thrown away main shaft 1 earlier under the effort of centrifugal force, get into in main shaft 1 when avoiding sealing 23 to strut, further improved this seal structure's sealing performance.
Preferably, the outer side wall of the support portion 21 is provided with a plurality of oil seal mounting grooves 211, and the oil seal mounting grooves 211 are disposed around the outer surface of the support portion 21. Adopt above-mentioned structure, can strengthen the frictional force between supporting part 21 and the annular groove 12, avoid main shaft 1 oil blanket 2 to take place to slide when high-speed rotatory, make the installation of oil blanket 2 more firm, further promoted the sealing performance of oil blanket 2.
Preferably, in the present embodiment, the oil seal 2 is made of a rubber material.
Preferably, still include bearing frame 4 and holding ring 5, bearing frame 4 is equipped with the holding chamber 41 of holding bearing, and a plurality of bearing is put to the holding intracavity 41, and bearing frame 4 passes through the bearing to be connected on main shaft 1, and the front end and the seal cover 3 fixed connection of bearing frame 4 are specific, can be through screw lock fixed connection. The sealing sleeve 3 is provided with a positioning boss 33, the positioning ring 5 is provided with a positioning groove 51 matched with the positioning boss 33, and the positioning boss 33 is in clearance fit with the positioning groove 51. After the structure is adopted, if water or dirt is generated in the accommodating cavity 41, when the main shaft 1 rotates at a high speed, the water or the dirt in the accommodating cavity 41 can be thrown outwards through the matching gap between the positioning boss 33 and the positioning groove 51. The rear end of main shaft 1 overlaps and is equipped with spacer 6 and lock nut 7, and spacer 6 sets up between lock nut 7 and bearing frame 4, can be with bearing frame 4 and spacer 6 fixed connection on main shaft 1 through lock nut 7.
After adopting above-mentioned structure, compare with prior art, beneficial effect lies in, this is novel when main shaft 1 is high-speed rotatory, drives oil blanket 2 and rotates together. Because the oil seal 2 is made of rubber material and has certain flexibility, the sealing part 23 expands outwards under the action of centrifugal force, the pressure of the oil seal 2 on the main shaft 1 is smaller, when the rotating speed of the main shaft 1 is increased, the sealing part 23 is separated from the sealing boss 31, and because the sealing part 23 is not in contact with the main shaft 1, no friction exists. The phenomenon that the main shaft 1 generates heat and the phenomenon that parts of the main shaft 1 are abraded due to friction are effectively avoided, and meanwhile, because the main shaft 1 is in a high-speed rotating state, water or other dirt in the main shaft 1 is thrown out by the shaft and cannot enter a sealing part. When the main shaft 1 is static, the sealing part 23 of the oil seal 2 is reset to the initial state and is abutted against the sealing boss 31, the main shaft 1 is sealed again, and a good static sealing effect is kept.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (7)
1. The utility model provides a high-speed main shaft seal structure of low temperature rise, its characterized in that, includes main shaft, oil blanket and seal cover, the fixed cover of seal cover is established on the main shaft, the front end of main shaft is equipped with sealing member installation boss, and sealing member installation boss is equipped with the annular groove, and the front end of seal cover is equipped with sealed boss, sealed boss stretches into inside the annular groove, the oil blanket inlays to be established in the annular groove, the oil blanket includes that the lower extreme of supporting part, sealing member and sealing part, supporting part and sealing part links together through the sealing member, and the upper end of sealing part slope setting and sealing part supports the top with the lateral wall of sealed boss.
2. A low temperature rise high speed spindle seal according to claim 1, wherein the front side wall of the gland is provided with a plurality of first seal grooves.
3. A low temperature rise, high speed spindle seal arrangement according to claim 1 wherein a second seal groove is formed between said support and seal portions.
4. A low temperature rise high speed spindle seal construction according to claim 3 wherein the outer side wall of said support portion is provided with an oil seal mounting groove.
5. The low temperature rise high speed spindle seal according to claim 4, wherein said oil seal is made of rubber material.
6. The low-temperature-rise high-speed main shaft sealing structure is characterized by further comprising a bearing seat and a positioning ring, wherein the bearing seat is provided with a containing cavity for containing a bearing, the bearing seat is connected to the main shaft through the bearing, the front end of the bearing seat is fixedly connected with a sealing sleeve, the sealing sleeve is provided with a positioning boss, the positioning ring is provided with a positioning groove matched with the positioning boss, and the positioning boss is in clearance fit with the positioning groove.
7. A low temperature rise high speed spindle sealing structure according to claim 6, wherein the rear end of the spindle is sleeved with a spacer and a lock nut, and the spacer is arranged between the lock nut and the bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221573232.2U CN217492704U (en) | 2022-06-22 | 2022-06-22 | Low-temperature-rise high-speed main shaft sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221573232.2U CN217492704U (en) | 2022-06-22 | 2022-06-22 | Low-temperature-rise high-speed main shaft sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217492704U true CN217492704U (en) | 2022-09-27 |
Family
ID=83339267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221573232.2U Active CN217492704U (en) | 2022-06-22 | 2022-06-22 | Low-temperature-rise high-speed main shaft sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217492704U (en) |
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2022
- 2022-06-22 CN CN202221573232.2U patent/CN217492704U/en active Active
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