CN212318784U - Shaft end sealing structure of stirring equipment - Google Patents
Shaft end sealing structure of stirring equipment Download PDFInfo
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- CN212318784U CN212318784U CN202020438779.6U CN202020438779U CN212318784U CN 212318784 U CN212318784 U CN 212318784U CN 202020438779 U CN202020438779 U CN 202020438779U CN 212318784 U CN212318784 U CN 212318784U
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Abstract
The utility model discloses a stirring equipment axle head seal structure, including main shaft, bearing, labyrinth seal spare and bearing frame, bearing, labyrinth seal spare cup joint on the main shaft, bearing frame and bearing inner race cooperation, bearing frame and labyrinth seal spare clearance fit are formed with labyrinth seal structure, if there is powder granule to leak, the powder granule can be discharged outside the main shaft through labyrinth seal structure. The utility model discloses can improve sealed effect, avoid the bearing to damage, be favorable to improving production efficiency and reduce the operation cost of enterprise.
Description
Technical Field
The utility model relates to a agitated vessel especially relates to an agitated vessel axle head seal structure.
Background
The shaft end sealing structure in the existing powder stirring equipment has the overall requirements of reliable sealing, high maintainability and low use cost. At present, a sealing structure of powder stirring equipment generally adopts a packing sealing structure, and although the sealing structure has the characteristics of mature technology, reliable sealing and the like, the following problems in long-term use cannot be avoided. For example, the packing sealing is adopted, the requirements on the outer diameter of the matching part of the moving shaft and the coaxiality processing precision of bearing seats at two ends of the moving shaft are met, and the axial positioning of the packing is realized by the axial compression of the end cover, so that the packing force along the axial direction is not uniform, the abrasion of the packing along the axial direction is not uniform, a powder material easily enters a sealing structure after being subjected to a certain extrusion force and easily enters a bearing raceway at the shaft end to damage a bearing, the grinding condition that powder particles are in contact with a sealing element is generated, the sealing function is damaged, the abrasion of the sealing element is intensified, the leakage is generated, the sealing failure is caused, the service life of the packing sealing is greatly reduced, the packing sealing is replaced at a high frequency, the production efficiency of equipment is.
In order to solve the problems, a shaft end sealing structure of the stirring equipment is urgently needed to be developed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an agitated vessel axle head seal structure can improve sealed effect, avoids the bearing to damage, is favorable to improving production efficiency and reduces the operation cost of enterprise.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides a stirring equipment axle head seal structure, includes main shaft, bearing, labyrinth seal and bearing frame, bearing, labyrinth seal cup joint on the main shaft, bearing frame and bearing inner race cooperation, the bearing frame is formed with labyrinth seal structure with labyrinth seal clearance fit, and the powder granule of leakage can pass through labyrinth seal structure discharges to in the stirring chamber.
Further, labyrinth seal structure includes labyrinth seal tooth and row's material through-hole, labyrinth seal tooth is located on the labyrinth seal spare, be equipped with the mounting groove on the bearing frame, labyrinth seal tooth and mounting groove clearance fit, it sets up on the bearing frame to arrange the material through-hole, it can be used for observing whether there is powder granule between labyrinth seal spare and the bearing frame to arrange the material through-hole, and makes the powder granule of leaking can pass through arrange the material through-hole and discharge to the stirring chamber in.
Further, the labyrinth seal teeth are arranged axially or radially.
Further, the central axis of the discharge through hole is perpendicular to the axis of the main shaft, or the central axis of the discharge through hole is inclined to the axis of the main shaft, and the inclination angle is greater than zero.
Further, labyrinth seal structure still includes spiral seal portion, spiral seal portion locates on labyrinth seal keeps away from the one end of bearing, just spiral seal portion extends to in the stirring chamber, the labyrinth seal tooth is located labyrinth seal near one end of bearing.
Furthermore, an air sealing channel is arranged on the bearing seat and used for introducing sealing air into a gap between the labyrinth sealing element and the bearing seat.
Further, agitated vessel axle head seal structure still includes the skeleton oil blanket, the skeleton oil blanket is located between labyrinth seal and the bearing frame for prevent that sealed gas from leaking.
Further, the shaft end sealing structure of the stirring equipment further comprises a shaft end cover, wherein the shaft end cover is fixedly connected to the bearing seat, an inner hole is formed in the shaft end cover, and the framework oil seal is installed in the inner hole.
Furthermore, a locking nut is mounted on the main shaft and used for locking the bearing and the labyrinth seal on the main shaft.
Furthermore, the shaft end sealing structure of the stirring equipment further comprises a positioning bearing seat, and the bearing seat is fixedly connected to the positioning bearing seat.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses agitated vessel axle head seal structure includes the main shaft, the bearing, labyrinth seal spare and bearing frame, wherein, be formed with labyrinth seal structure through bearing frame and labyrinth seal spare clearance fit, be favorable to improving sealed effect, moreover, if there is powder granule to leak, the powder granule can be discharged outside the main shaft through labyrinth seal structure, and can collect and make it get back to the stirring intracavity, can effectively avoid the powder granule to get into the bearing and lead to the bearing to damage, be favorable to prolonging axle head seal structure's life, improve production efficiency and reduce the operation cost of enterprise.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic structural view of a labyrinth seal according to the present invention;
FIG. 3 is a schematic structural view of the bearing seat of the present invention;
in the figure: 1. a main shaft; 2. a labyrinth seal; 201. a spiral seal portion; 202. labyrinth seal teeth; 3. a stirring chamber; 4. positioning a bearing seat; 5. a bearing seat; 501. an air-tight seal channel; 502. a discharge through hole; 503. mounting grooves; 6. a bolt; 7. framework oil seal; 8. a shaft end cover; 9. and a bearing.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1-3, a shaft end sealing structure of a stirring device comprises a main shaft 1, a bearing 9, a labyrinth sealing element 2 and a bearing seat 5, wherein the bearing 9 and the labyrinth sealing element 2 are sleeved on the main shaft 1, the bearing seat 5 is matched with an outer ring of the bearing 9, the bearing seat 5 is in clearance fit with the labyrinth sealing element 2 to form the labyrinth sealing structure, and if powder particles leak, the powder particles can be discharged out of the main shaft 1 through the labyrinth sealing structure and then return to a stirring cavity 3.
The utility model discloses agitated vessel axle head seal structure includes main shaft 1, bearing 9, labyrinth seal spare 2 and bearing frame 5, wherein, be formed with labyrinth seal structure through bearing frame 5 and 2 clearance fit of labyrinth seal spare, be favorable to improving sealed effect, moreover, powder granule can discharge outside main shaft 1 through labyrinth seal structure, can make it get back to in stirring chamber 3 through collecting, can effectively avoid powder granule to get into bearing 9 and lead to the bearing 9 to damage, be favorable to prolonging axle head seal structure's life, improve production efficiency and reduce the running cost of enterprise.
As a preferred implementation manner in this embodiment, the labyrinth seal structure includes labyrinth seal tooth 202 and discharge through hole 502, labyrinth seal tooth 202 is disposed on labyrinth seal 2, bearing seat 5 is provided with mounting groove 503, labyrinth seal tooth 202 and mounting groove 503 are in clearance fit, discharge through hole 502 is disposed on bearing seat 5, discharge through hole 502 can be used for observing whether there are powder particles between labyrinth seal 2 and bearing seat 5, if there is powder particle leakage, powder particles can be discharged to the outside of spindle 1 through discharge through hole 502, so, powder particle accumulation can be reduced, and bearing 9 is protected from being damaged.
It should be noted that, the labyrinth seal teeth 202 are disposed axially or radially, in this embodiment, the labyrinth seal teeth 202 are disposed radially, and the number thereof may be one or more.
It should be emphasized that the central axis of the discharge through hole 502 is perpendicular to the axis of the main shaft 1, or the central axis of the discharge through hole 502 is inclined to the axis of the main shaft 1, and the inclination angle is greater than zero. In addition, the number of the discharge through holes 502 may be one or more, and the cross-sectional shape may be round, oval, square or other irregular shapes.
It is worth mentioning that the labyrinth seal structure further comprises a spiral seal part 201, the spiral seal part 201 is arranged at one end of the labyrinth seal 2 far away from the bearing 9, the spiral seal part 201 extends out of the main shaft 1 and is directly communicated with the stirring cavity 3, and the labyrinth seal teeth 202 are arranged at one end of the labyrinth seal 2 close to the bearing 9.
In a preferred embodiment, the bearing housing 5 is provided with a gas-tight channel 501 for introducing a sealing gas into the gap between the labyrinth seal 2 and the bearing housing 5. Specifically, the airtight channel 501 is communicated with the stirring chamber 3, the central axis of the airtight channel 501 is perpendicular to, horizontal to or at a certain inclination angle with the axis of the main shaft 1, the cross section of the airtight channel 501 can be designed to be round, oval or square, and other shapes, and the number of the airtight channels can be one or more.
Preferably, the shaft end sealing structure of the stirring device further comprises a framework oil seal 7, wherein the framework oil seal 7 is arranged between the labyrinth seal 2 and the bearing seat 5 and is used for preventing sealing gas from leaking towards the outer side of the stirring cavity 3.
In addition, the shaft end sealing structure of the stirring equipment further comprises a shaft end cover 8, the shaft end cover 8 is fixedly connected to the bearing block 5, an inner hole is formed in the shaft end cover 8, and the framework oil seal 7 is installed in the inner hole. Preferably, the end cap 8 is screwed to the bearing seat 5.
Specifically, a lock nut is mounted on the main shaft 1, and the lock nut is used for locking the bearing 9 and the labyrinth seal 2 on the main shaft 1.
In addition, the shaft end sealing structure of the stirring device further comprises a positioning bearing seat 4, and the bearing seat 5 is fixedly connected to the positioning bearing seat 4. Preferably, the bearing block 5 is screwed to the positioning bearing block 4.
During the installation, labyrinth seal 2, bearing 9 is packed into on main shaft 1, lock nut locking labyrinth seal 2 and bearing 9, bearing frame 5 and the cooperation of bearing 9 outer lane, mounting groove 503 on the bearing frame 5 keeps little clearance fit with labyrinth seal tooth 202 on labyrinth seal 2 and plays radial seal effect, skeleton oil blanket 7 is packed into in the hole on bearing frame 5 and the axle head end cover 8, bearing frame 5 fixes a position through location bearing frame 4, reuse bolt 6 locking bearing frame 5, lock axle head end cover 8 on bearing frame 5 with bolt 6 at last, thereby form axle head seal structure.
The working principle is as follows: the stirring equipment is placed in the stirring cavity 3, before the stirring equipment works, a compressed gas switch on the equipment is turned on, sealing gas with certain pressure is introduced into a gas sealing channel 501 on the bearing seat 5, the pressure of the sealing gas is larger than the pressure in the stirring cavity 3, and the gas sealing is the first sealing of the whole shaft end sealing structure. The framework oil seal 7 adjacent to the airtight sealing passage 501 functions to prevent leakage of the sealing gas.
The spiral sealing part 201 on the labyrinth sealing part 2 is a second sealing, and under the condition that the first sealing fails, if powder particles enter the labyrinth sealing part 2, the powder particles are pushed into the stirring cavity 3 under the action of the spiral sealing part 201.
Under the condition that first, second seal all became invalid, if when powder granule entered into labyrinth seal 2 on, under labyrinth seal tooth 202's effect, play radial seal effect, here play the third seal effect, still can discharge the powder granule that leaks through arranging material through-hole 502 on the bearing frame 5 simultaneously, arrange material through-hole 502 on the bearing frame 5 and still have simultaneously can in time through this hole observation axle head whether have the effect that powder granule leaked. If the powder particles are not discharged completely through the discharge through hole 502 on the bearing seat 5 and slightly remain, the skeleton oil seal 7 close to the labyrinth seal teeth 202 plays the last sealing role, so that the powder particles can be effectively prevented from entering the bearing 9, and the bearing 9 is protected from being damaged.
Through first, two, three sealed designs and the row's on the bearing frame 5 material through-hole 502, will prevent effectively that powder granule from getting into bearing 9, avoid damaging bearing 9, destroy the sealing machine function, the aggravation axle head seal structure wearing and tearing, produce the leakage, make sealed inefficacy.
To sum up, compare with current adoption technique, the utility model discloses can solve current agitated vessel axle head seal structure and have life short excessively, reliability and maintainability low, the high scheduling problem of use cost, indirectly improve the production efficiency of enterprise, reduce the operation cost of enterprise.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a stirring equipment axle head seal structure which characterized in that: including main shaft, bearing, labyrinth sealing member and bearing frame, bearing, labyrinth sealing member cup joint on the main shaft, bearing frame and bearing inner race cooperation, bearing frame and labyrinth sealing member clearance fit are formed with labyrinth seal structure, and the powder granule of leaking can be passed through labyrinth seal structure discharges to in the stirring chamber.
2. The axial end sealing structure of a stirring device as recited in claim 1, wherein: labyrinth seal structure includes labyrinth seal tooth and arranges the material through-hole, labyrinth seal tooth is located on the labyrinth seal spare, be equipped with the mounting groove on the bearing frame, labyrinth seal tooth and mounting groove clearance fit, it sets up on the bearing frame to arrange the material through-hole, it can be used for observing whether there is powder granule between labyrinth seal spare and the bearing frame to arrange the material through-hole, and makes the powder granule of leaking can warp arrange the material through-hole and discharge to the stirring chamber in.
3. The axial end sealing structure of a stirring device as recited in claim 2, wherein: the labyrinth seal teeth are axially arranged or radially arranged.
4. The axial end sealing structure of a stirring device as recited in claim 2, wherein: the central axis of the discharge through hole is perpendicular to the axis of the main shaft, or the central axis of the discharge through hole is obliquely arranged with the axis of the main shaft, and the inclination angle is larger than zero.
5. A stirring apparatus shaft end sealing structure as recited in any one of claims 2-4, wherein: labyrinth seal structure still includes spiral seal portion, spiral seal portion locates labyrinth seal spare and keeps away from one of bearing on one, just spiral seal portion extends to in the stirring chamber, the labyrinth seal tooth is located labyrinth seal spare and is close to one of bearing and serve.
6. The axial end sealing structure of a stirring device as recited in claim 1, wherein: and the bearing seat is provided with an air sealing channel for introducing sealing air into a gap between the labyrinth sealing element and the bearing seat.
7. The axial end sealing structure of a stirring device as recited in claim 1, wherein: the shaft end sealing structure of the stirring equipment further comprises a framework oil seal, and the framework oil seal is arranged between the labyrinth sealing element and the bearing seat and used for preventing sealing gas from leaking.
8. The axial end sealing structure of a stirring device as recited in claim 7, wherein: the stirring equipment shaft end sealing structure further comprises a shaft end cover, the shaft end cover is fixedly connected to the bearing block, an inner hole is formed in the shaft end cover, and the framework oil seal is installed in the inner hole.
9. The axial end sealing structure of a stirring device as recited in claim 1, wherein: and the main shaft is provided with a locking nut which is used for locking the bearing and the labyrinth sealing element on the main shaft.
10. The axial end sealing structure of a stirring device as recited in claim 1, wherein: the shaft end sealing structure of the stirring equipment further comprises a positioning bearing seat, and the bearing seat is fixedly connected to the positioning bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438779.6U CN212318784U (en) | 2020-03-30 | 2020-03-30 | Shaft end sealing structure of stirring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020438779.6U CN212318784U (en) | 2020-03-30 | 2020-03-30 | Shaft end sealing structure of stirring equipment |
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| Publication Number | Publication Date |
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| CN212318784U true CN212318784U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020438779.6U Active CN212318784U (en) | 2020-03-30 | 2020-03-30 | Shaft end sealing structure of stirring equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984118A (en) * | 2021-03-02 | 2021-06-18 | 湖南宏工智能科技有限公司 | Shaft end sealing structure |
| CN115041082A (en) * | 2022-06-10 | 2022-09-13 | 中南大学 | Shaft end sealing device of powder mixing equipment and mounting method thereof |
-
2020
- 2020-03-30 CN CN202020438779.6U patent/CN212318784U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984118A (en) * | 2021-03-02 | 2021-06-18 | 湖南宏工智能科技有限公司 | Shaft end sealing structure |
| CN112984118B (en) * | 2021-03-02 | 2023-11-17 | 湖南宏工智能科技有限公司 | Shaft end sealing structure |
| CN115041082A (en) * | 2022-06-10 | 2022-09-13 | 中南大学 | Shaft end sealing device of powder mixing equipment and mounting method thereof |
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