CN220118380U - Sealing structure of high-speed centrifugal vacuum pump - Google Patents
Sealing structure of high-speed centrifugal vacuum pump Download PDFInfo
- Publication number
- CN220118380U CN220118380U CN202322864727.1U CN202322864727U CN220118380U CN 220118380 U CN220118380 U CN 220118380U CN 202322864727 U CN202322864727 U CN 202322864727U CN 220118380 U CN220118380 U CN 220118380U
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- Prior art keywords
- vacuum pump
- speed centrifugal
- sleeve
- ring
- centrifugal vacuum
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 62
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 239000000565 sealant Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a high-speed centrifugal vacuum pump sealing structure, and belongs to the technical field of vacuum pump sealing. The novel rotary shaft sleeve comprises a shaft sleeve and a sleeve shell, wherein the shaft sleeve is sleeved on a rotary shaft, and a plurality of first lugs are arranged on the circumferential surface of the outer side of the shaft sleeve at intervals. The sleeve is sleeved outside the sleeve, the end of the sleeve is fixedly connected with the pump shell, a plurality of second lugs are arranged on the circumferential surface of the inner side of the sleeve at intervals, and the second lugs are inserted between two adjacent first lugs. The utility model performs shaft end sealing in a labyrinth sealing mode without adding an additional cooling system.
Description
Technical Field
The utility model belongs to the technical field of vacuum pump sealing, and particularly relates to a high-speed centrifugal vacuum pump sealing structure.
Background
The vacuum pump is a common industrial device and comprises a pump body and a driving part, wherein a rotating shaft inside the pump body penetrates through the outside of the pump body to be connected with the driving part. In order to improve the tightness of the pump body, a sealing device needs to be arranged at the position of the rotating shaft at the outlet of the pump body. The existing sealing device mostly adopts packing seal, but a cooling mechanism is needed to cool the packing seal in the working process of the packing seal.
Disclosure of Invention
The utility model aims to solve the technical problems that: the utility model provides a sealing structure of a high-speed centrifugal vacuum pump, which overcomes the defects of the prior art and performs shaft end sealing in a labyrinth sealing mode without adding an additional cooling system.
The utility model solves the problems that the technical proposal adopted is as follows:
the high-speed centrifugal vacuum pump sealing structure comprises a shaft sleeve and a casing, wherein the shaft sleeve is sleeved on a rotating shaft, and a plurality of first lugs are arranged on the circumferential surface of the outer side of the shaft sleeve at intervals.
The sleeve is sleeved outside the sleeve, the end of the sleeve is fixedly connected with the pump shell, a plurality of second lugs are arranged on the circumferential surface of the inner side of the sleeve at intervals, and the second lugs are inserted between two adjacent first lugs.
Preferably, a gap is arranged between the first lug and the second lug.
Preferably, the gap between the first tab and the second tab is less than 1mm.
Preferably, a gap is arranged between the first lug and the inner circumferential surface of the sleeve, and a gap is arranged between the second lug and the outer circumferential surface of the sleeve.
Preferably, the casing comprises an upper semicircular casing and a lower semicircular casing, and the two semicircular casings are fixedly connected through bolts.
Preferably, the rotating shaft is sleeved with a sealing ring, the sealing ring is fixedly connected with the pump shell, and the shaft sleeve is abutted with the sealing ring.
Preferably, a sealant or a sealing ring is arranged between the sealing ring and the pump shell.
Preferably, the inner diameter of the sealing ring is larger than the outer diameter of the rotating shaft.
Preferably, one side of the shaft sleeve facing the sealing ring is provided with a first graphite ring, one side of the sealing ring facing the shaft sleeve is provided with a second graphite ring, and the first graphite ring is abutted with the second graphite ring.
Preferably, the first graphite ring abutting surface is convexly provided with a convex ring, the second graphite ring abutting surface is provided with a groove, and the convex ring is inserted into the groove.
Compared with the prior art, the utility model has the beneficial effects that: the shaft end sealing function of the vacuum pump is realized through labyrinth sealing, so that heat generated by friction is reduced, and the sealing effect is optimized. Meanwhile, an additional cooling system is not needed, so that the cost is reduced, and the occupied area of the vacuum pump is reduced.
Drawings
The utility model will be further described with reference to the drawings and examples.
Figure 1 is an external structural view of a sealing structure of a high-speed centrifugal vacuum pump of the present utility model,
figure 2 is a cross-sectional view of a sealing structure of a high-speed centrifugal vacuum pump of the present utility model,
figure 3 is an enlarged view of a portion of figure 2 at a,
figure 4 is an enlarged view of a portion of figure 2 at B,
figure 5 is an exploded view of the shaft sleeve in the sealing structure of the high-speed centrifugal vacuum pump of the present utility model,
figure 6 is a structural view of the lower casing of the sealing structure of the high-speed centrifugal vacuum pump of the present utility model,
fig. 7 is an exploded view of a seal ring in the sealing structure of the high-speed centrifugal vacuum pump of the present utility model.
In the figure, the rotor comprises a 1-rotating shaft, a 2-pump shell, a 3-shaft sleeve, a 301-first lug, a 302-first graphite ring, a 303-convex ring, a 4-casing, a 401-second lug, a 5-sealing ring, a 501-bottom ring, a 502-second graphite ring and a 503-groove.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The drawings are preferred embodiments of the sealing structure of the high-speed centrifugal vacuum pump, and the utility model is further described in detail below with reference to the drawings.
The high-speed centrifugal vacuum pump sealing structure comprises a shaft sleeve 3 and a casing 4, wherein the shaft sleeve 3 is sleeved on a rotating shaft 1, no gap is reserved between the shaft sleeve 3 and the rotating shaft 1, and the shaft sleeve 3 can be sleeved on the rotating shaft 1 through a hot sleeve process.
A plurality of first lugs 301 are arranged on the circumferential surface of the outer side of the shaft sleeve 3 at intervals, a casing 4 is sleeved outside the shaft sleeve 3, the end part of the casing 4 is fixedly connected with the pump casing 2, a plurality of second lugs 401 are arranged on the circumferential surface of the inner side of the casing 4 at intervals, and the second lugs 401 are inserted between two adjacent first lugs 301.
A gap is provided between the first tab 301 and the second tab 401. The gap between the first tab 301 and the second tab 401 is less than 1mm.
A labyrinth seal is formed between the first protruding pieces 301 and the second protruding pieces 401, a gap is formed between the first protruding pieces 301 and the inner circumferential surface of the sleeve 4, and a gap is formed between the second protruding pieces 401 and the outer circumferential surface of the sleeve 3. In this way no friction and no heat is generated by friction during rotation, and no additional cooling system is needed as in a packing seal.
For convenience of installation, the casing 4 comprises an upper semicircular casing and a lower semicircular casing, and the two semicircular casings are fixedly connected through bolts. A sealing gasket or sealant is arranged between the upper semicircular shell abutting surface and the lower semicircular shell abutting surface of the shell 4, so that the sealing effect of the abutting surfaces is ensured. Meanwhile, the abutting position between the shell 4 and the pump shell 2 is also provided with sealant, so that the sealing effect is improved.
In order to further improve the sealing effect, the rotating shaft 1 is sleeved with a sealing ring 5, the sealing ring 5 is fixedly connected with the pump shell 2, and the shaft sleeve 3 is abutted with the sealing ring 5. And a sealant or a sealing ring is arranged between the sealing ring 5 and the pump shell 2. The inner diameter of the sealing ring 5 is larger than the outer diameter of the rotating shaft 1.
In order to reduce the heat generated during the rotation friction, the side of the shaft sleeve 3 facing the sealing ring 5 is provided with a first graphite ring 302, the sealing ring 5 comprises a hard bottom ring 501 and a second graphite ring 502 facing the side of the shaft sleeve 3, and the first graphite ring 302 is abutted against the second graphite ring 502.
The bottom ring 501 is fixedly connected with the pump shell 2 through screws, and the second graphite ring 502 is inlaid on the bottom ring 501 and is fixedly connected with the bottom ring 501. The first graphite ring 302 is inlaid on the shaft sleeve 3, and the first graphite ring and the shaft sleeve are fixedly connected.
Convex ring 303 is arranged on the abutting surface of first graphite ring 302 in a convex mode, groove 503 is arranged on the abutting surface of second graphite ring 502, and convex ring 303 is inserted into groove 503.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. High-speed centrifugal vacuum pump seal structure, its characterized in that:
comprises a shaft sleeve (3) and a casing (4), wherein the shaft sleeve (3) is sleeved on a rotating shaft (1), a plurality of first lugs (301) are arranged on the circumferential surface of the outer side of the shaft sleeve (3) at intervals,
the sleeve (3) is externally sleeved with a casing (4), the end part of the casing (4) is fixedly connected with the pump casing (2), a plurality of second lugs (401) are arranged on the circumferential surface of the inner side of the casing (4) at intervals, and the second lugs (401) are inserted between two adjacent first lugs (301).
2. The high-speed centrifugal vacuum pump sealing structure according to claim 1, wherein:
a gap is arranged between the first lug (301) and the second lug (401).
3. The high-speed centrifugal vacuum pump sealing structure according to claim 2, wherein:
the gap between the first tab (301) and the second tab (401) is less than 1mm.
4. A high-speed centrifugal vacuum pump sealing structure according to claim 1 or 2 or 3, wherein:
a gap is arranged between the first lug (301) and the inner circumferential surface of the sleeve (4), and a gap is arranged between the second lug (401) and the outer circumferential surface of the shaft sleeve (3).
5. A high-speed centrifugal vacuum pump sealing structure according to claim 1 or 2 or 3, wherein:
the casing (4) comprises an upper semicircular casing and a lower semicircular casing, and the two semicircular casings are fixedly connected through bolts.
6. The high-speed centrifugal vacuum pump sealing structure according to claim 5, wherein:
the rotating shaft (1) is sleeved with a sealing ring (5), the sealing ring (5) is fixedly connected with the pump shell (2), and the shaft sleeve (3) is abutted with the sealing ring (5).
7. The high-speed centrifugal vacuum pump sealing structure according to claim 6, wherein:
and a sealant or a sealing ring is arranged between the sealing ring (5) and the pump shell (2).
8. The high-speed centrifugal vacuum pump sealing structure according to claim 6 or 7, wherein:
the inner diameter of the sealing ring (5) is larger than the outer diameter of the rotating shaft (1).
9. The high-speed centrifugal vacuum pump sealing structure according to claim 8, wherein:
one side of the shaft sleeve (3) facing the sealing ring (5) is provided with a first graphite ring (302), one side of the sealing ring (5) facing the shaft sleeve (3) is provided with a second graphite ring (502), and the first graphite ring (302) is abutted with the second graphite ring (502).
10. The high-speed centrifugal vacuum pump sealing structure according to claim 9, wherein:
convex rings (303) are convexly arranged on the abutting surface of the first graphite ring (302), grooves (503) are formed in the abutting surface of the second graphite ring (502), and the convex rings (303) are inserted into the grooves (503).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322864727.1U CN220118380U (en) | 2023-10-25 | 2023-10-25 | Sealing structure of high-speed centrifugal vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322864727.1U CN220118380U (en) | 2023-10-25 | 2023-10-25 | Sealing structure of high-speed centrifugal vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220118380U true CN220118380U (en) | 2023-12-01 |
Family
ID=88888316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322864727.1U Active CN220118380U (en) | 2023-10-25 | 2023-10-25 | Sealing structure of high-speed centrifugal vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220118380U (en) |
-
2023
- 2023-10-25 CN CN202322864727.1U patent/CN220118380U/en active Active
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