CN217421615U - Sealing structure of main shaft and impeller of air compressor - Google Patents
Sealing structure of main shaft and impeller of air compressor Download PDFInfo
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- CN217421615U CN217421615U CN202221568595.7U CN202221568595U CN217421615U CN 217421615 U CN217421615 U CN 217421615U CN 202221568595 U CN202221568595 U CN 202221568595U CN 217421615 U CN217421615 U CN 217421615U
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Abstract
The utility model relates to the technical field of air compressors, in particular to a sealing structure of a main shaft and an impeller of an air compressor, which comprises a main shaft, a back plate, an impeller and a volute covering the impeller, wherein the back plate and the impeller are sequentially sleeved on the main shaft, and a shaft sleeve is arranged between the back plate and the main shaft; an inner hole sealing tooth is arranged in an inner hole of the back plate, an end face sealing tooth is arranged on one end face of the back plate, an auxiliary blade is arranged on the back face of the impeller, a back face sealing tooth is arranged on the auxiliary blade, and a first comb tooth seal is formed between the inner hole sealing tooth and the shaft sleeve; the end face sealing teeth and the back face sealing teeth are matched to form second comb tooth sealing. The utility model discloses seal structure sets up sealed tooth and backplate end face seal tooth at the impeller back and forms the broach sealed, also forms the broach sealed between backplate hole seal tooth and the axle sleeve, and the centrifugal force that vice blade produced lets wheel back department air current to the impeller runner, and the broach is sealed and centrifugal force combined action prevents that impeller runner high-pressure gas from leaking the wheel back dorsal part through the wheel back clearance, improves the pneumatic efficiency of unit.
Description
Technical Field
The utility model relates to an air compressor machine technical field specifically is a seal structure of air compressor machine main shaft and impeller.
Background
In the working process of the air compressor, the air is usually worked by means of the impeller, unnecessary leakage is prevented in the air compression process, and the internal sealing of the air compressor is a means which is relatively wide in application. In the existing air compressor, the sealing among all areas on a shaft system is realized by using parts of a radial sealing structure, and basically, the radial sealing structure is formed by uniformly arranging and distributing comb teeth, but for the fuel cell air compressor, due to the structural limitation of weight and axial size, the shaft system cannot provide enough axial space for the distribution of the comb teeth, so that the requirement of discharge capacity cannot be met, and the improvement of the efficiency and performance of the fuel cell air compressor is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the technical problem in the background art, a broach seal structure between air compressor machine main shaft and the impeller is provided.
In order to achieve the purpose, the utility model provides a sealing structure of a main shaft and an impeller of an air compressor, which comprises a main shaft, a back plate, the impeller and a volute casing covered on the impeller,
the back plate and the impeller are sequentially sleeved on the main shaft, and a shaft sleeve is arranged between the back plate and the main shaft;
the inner hole of the back plate is provided with inner hole sealing teeth, the end surface of the back plate close to one end of the impeller is provided with end surface sealing teeth,
the back of the impeller is provided with a group of auxiliary blades, the group of auxiliary blades are provided with back sealing teeth,
a first comb seal is formed between the inner hole seal teeth and the shaft sleeve; the end face sealing teeth and the back face sealing teeth are matched to form second comb tooth sealing.
Further, a group of the auxiliary blades are evenly distributed at intervals along the circumferential direction of the impeller.
Preferably, the number of secondary blades in a set is 6.
Further, a set of the auxiliary blades comprises a plurality of first auxiliary blades and second auxiliary blades, the length of the second auxiliary blades is smaller than that of the first auxiliary blades, and the first auxiliary blades and the second auxiliary blades are arranged alternately.
Preferably, the number of the first secondary blades is 6, and the number of the second secondary blades is equal to the number of the first secondary blades.
The utility model has the advantages that: the utility model discloses a seal structure of air compressor machine main shaft and impeller sets up isometric or the seal tooth that varies length at the impeller back, and it is sealed to form the broach with backplate end face seal tooth, also forms the broach between backplate hole seal tooth and the axle sleeve and seals, and the auxiliary vane is rotatory along with the impeller, and the centrifugal force that the auxiliary vane produced lets wheel back department air current to the impeller runner, and the broach is sealed and centrifugal force combined action prevents that impeller runner high-pressure gas from leaking the wheel back dorsal part through wheel back clearance, improves the pneumatic efficiency of unit.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a sectional view of the combined structure of the casing and the stator of the air compressor of the present invention;
fig. 2 is a schematic structural diagram of the back of the air compressor impeller according to one embodiment of the present invention;
fig. 3 is a schematic structural view of the back of an air compressor impeller according to another embodiment of the present invention;
in the figure: 1-main shaft, 2-shaft sleeve, 3-back plate, 4-impeller, 5-volute, 31-inner hole sealing tooth, 32-end face sealing tooth, 41-auxiliary blade, 42-back face sealing tooth, 411-first auxiliary blade and 412-second auxiliary blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In a specific embodiment of the present invention, as shown in fig. 1 to 2, a sealing structure for a main shaft and an impeller of an air compressor comprises a main shaft 1, a back plate 3, an impeller 4, and a volute 5 covering the impeller 4, wherein the back plate 3 and the impeller 4 are sequentially sleeved on the main shaft 1, and a shaft sleeve 2 is arranged between the back plate 3 and the main shaft 1; an inner hole sealing tooth 31 is arranged in an inner hole of the back plate 3, an end face sealing tooth 32 is arranged on the end face of the back plate 3 close to the impeller 4, a group of auxiliary blades 41 are arranged on the back face of the impeller 4, back face sealing teeth 42 are arranged on the group of auxiliary blades 41, and a first comb tooth seal is formed between the inner hole sealing tooth 31 and the shaft sleeve 2; the end face seal teeth 32 cooperate with the back face seal teeth 42 to form a second comb seal.
Preferably, the number of the secondary blades 41 in one set is 6 and the secondary blades are uniformly spaced in the circumferential direction of the impeller 4.
In another preferred embodiment of the present invention, as shown in fig. 1 and 3, a set of said secondary blades 41 comprises a plurality of first secondary blades 411 and second secondary blades 412, said first secondary blades 411 are 6 in number, and said second secondary blades 412 are equal in number to said first secondary blades 411. The length of the second auxiliary blade 412 is smaller than that of the first auxiliary blade 411, and the first auxiliary blade 411 and the second auxiliary blade 412 are alternately arranged at equal intervals along the circumferential direction of the impeller 4.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (5)
1. A sealing structure of a main shaft and an impeller of an air compressor is characterized by comprising a main shaft (1), a back plate (3), an impeller (4) and a volute (5) covered on the impeller (4),
the back plate (3) and the impeller (4) are sequentially sleeved on the main shaft (1), and a shaft sleeve (2) is arranged between the back plate (3) and the main shaft (1);
the inner hole of the back plate (3) is provided with inner hole sealing teeth (31), the end face of one end of the back plate (3) close to the impeller (4) is provided with end face sealing teeth (32),
a group of auxiliary blades (41) are arranged on the back of the impeller (4), back sealing teeth (42) are arranged on the auxiliary blades (41),
a first comb tooth seal is formed between the inner hole sealing teeth (31) and the shaft sleeve (2); the end face sealing teeth (32) and the back face sealing teeth (42) are matched to form second comb tooth sealing.
2. The sealing structure for the main shaft and the impeller of the air compressor according to claim 1, wherein a group of the secondary blades (41) are uniformly spaced along the circumferential direction of the impeller (4).
3. The sealing structure for the main shaft and the impeller of the air compressor according to claim 2, wherein the number of the set of the auxiliary blades (41) is 6.
4. The sealing structure of main shaft and impeller of air compressor according to claim 2, characterized in that a set of said secondary blades (41) comprises a plurality of first secondary blades (411) and second secondary blades (412), said second secondary blades (412) have a length smaller than that of the first secondary blades (411), said first secondary blades (411) and second secondary blades (412) are arranged alternately.
5. The sealing structure of main shaft and impeller of air compressor according to claim 4, characterized in that the number of said first auxiliary blades (411) is 6, and the number of said second auxiliary blades (412) is equal to the number of said first auxiliary blades (411).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221568595.7U CN217421615U (en) | 2022-06-22 | 2022-06-22 | Sealing structure of main shaft and impeller of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221568595.7U CN217421615U (en) | 2022-06-22 | 2022-06-22 | Sealing structure of main shaft and impeller of air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217421615U true CN217421615U (en) | 2022-09-13 |
Family
ID=83173691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221568595.7U Active CN217421615U (en) | 2022-06-22 | 2022-06-22 | Sealing structure of main shaft and impeller of air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217421615U (en) |
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2022
- 2022-06-22 CN CN202221568595.7U patent/CN217421615U/en active Active
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