CN219282008U

CN219282008U - A kind of compressor

Info

Publication number: CN219282008U
Application number: CN202223216624.6U
Authority: CN
Inventors: 李洪滨; 杨通; 沈俊睿; 童章印; 张吉星; 王立明; 王坤; 郑世强
Original assignee: Ningbo Institute of Innovation of Beihang University
Current assignee: Ningbo Institute of Innovation of Beihang University
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-30
Anticipated expiration: 2032-12-01

Abstract

The compressor comprises a power driving part and an air compression part connected with the power driving part, wherein the power driving part comprises a casing with a hollow inside and a driving motor arranged in the casing, the driving motor comprises a stator assembly assembled in the casing and a rotor assembly arranged in the stator assembly, the rotor assembly comprises a rotating shaft, the air compression part comprises a volute with an air compression cavity inside and an impeller arranged in the air compression cavity, the volute is provided with a through hole communicated with the air compression cavity, and one end of the rotating shaft is in driving connection with the impeller after passing through the through hole on the volute; the method is characterized in that: the sealing structure comprises a sealing ring which is sealed and arranged outside the rotating shaft, and the sealing ring is also in sealing and fastening connection with the through hole of the spiral case and the side wall of the spiral case. The utility model has the advantages that: the tightness between the rotating shaft and the volute is ensured, no gas leakage exists, and the installation is convenient.

Description

A kind of compressor

Technical Field

The present utility model relates to a compressor.

Background

The compressor is used as common rotary electromechanical equipment, and mainly drives an impeller to rotate at the shaft end of a motor to compress low-pressure gas into required high-pressure gas. The compressor cavity mainly relates to the sealing of a stator and a rotor and the sealing between two parts of volutes. The gas in the compressor cavity has certain pressure, if the compressor cavity has air leakage and other conditions, the performance parameters such as the compression ratio of the compressor, the stability of the running of the impeller and the like can be directly influenced, and additional noise and the like can be brought; if the working medium gas is a harmful gas, a seal is more needed, and gas leakage is not allowed. At present, the existing sealing structures are all sealing rings, but the sealing performance of the sealing rings is insufficient, and gas leakage still exists.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a compressor with good sealing effect aiming at the prior art.

The technical scheme adopted for solving the technical problems is as follows: the compressor comprises a power driving part and an air compression part connected with the power driving part, wherein the power driving part comprises a casing with a hollow inside and a driving motor arranged in the casing, the driving motor comprises a stator assembly assembled in the casing and a rotor assembly arranged in the stator assembly, the rotor assembly comprises a rotating shaft, the air compression part comprises a volute with an air compression cavity inside and an impeller arranged in the air compression cavity, the volute is provided with a through hole communicated with the air compression cavity, and one end of the rotating shaft is in driving connection with the impeller after passing through the through hole on the volute; the method is characterized in that: the sealing structure comprises a sealing ring which is sealed and arranged outside the rotating shaft, and the sealing ring is also in sealing and fastening connection with the through hole of the spiral case and the side wall of the spiral case.

The sealing ring has multiple structures, and is preferable, the sealing ring include the interior sealing ring and with interior sealing ring fixed connection's outer sealing ring, the outer sealing ring is with whole interior sealing ring encirclement inside, and one side of outer sealing ring is formed with round annular and pastes the fender portion, interior sealing ring seal cover establishes outside the pivot, and interior sealing ring and outer sealing ring seal fix in the perforation of spiral case, and the annular of outer sealing ring paste fender portion and the lateral wall seal of spiral case hug closely and set up.

In order to enable the annular blocking part of the outer sealing ring to be in sealing and clinging arrangement with the side wall of the volute, the side wall of the volute in the air compression cavity is provided with a blocking step surface positioned on the perforated outer ring, and the annular blocking part of the outer sealing ring is in sealing and clinging arrangement with the blocking step surface.

In order to strengthen the tightness between the annular blocking part and the blocking step surface, a sealing groove is arranged on the surface of the annular blocking part, which is opposite to the blocking step surface, and a sealing ring is arranged in the sealing groove.

There are multiple connected modes between inner seal ring and the outer seal ring, as the preference, have grafting lug on the inner seal ring outside rampart, have on the inner side rampart of outer seal ring with grafting lug matched grafting recess, connect fixedly through grafting lug and grafting recess's grafting cooperation between inner seal ring and the outer seal ring.

The outer sealing ring has various structures, and is preferable, the outer sealing ring is formed by splicing a first outer sealing ring which is semi-circular and a second outer sealing ring which is semi-circular, and the first outer sealing ring and the second outer sealing ring are positioned through the spigot and are in fastening connection.

The first outer sealing ring and the second outer sealing ring have various structures positioned through the spigot, and as optimization, two sides of the bottom of a matching surface of the first outer sealing ring and the second outer sealing ring for spigot positioning are provided with convex spigot, and two sides of the bottom of the matching surface of the second outer sealing ring and the first outer sealing ring for spigot positioning are provided with concave spigot which is in limit fit with the convex spigot.

In order to strengthen the tightness between the first outer sealing ring and the second outer sealing ring, a rubber gasket is arranged between the fastening matching surfaces of the first outer sealing ring and the second outer sealing ring.

The volute is assembled in a plurality of modes, and preferably, the volute is formed by sealing and assembling a first volute and a second volute, and the first volute and the second volute are positioned through a spigot; the perforation is arranged on the first volute, and the shell is also fixedly connected with the first volute.

In order to prevent air leakage while enabling the first volute and the second volute to be matched in a positioning way, a sealing gasket is arranged in a gap between sealing surfaces corresponding to the first volute and the second volute.

Compared with the prior art, the utility model has the advantages that: the compressor comprises a sealing structure for carrying out gas sealing on the joint of the rotating shaft and the through hole of the volute, wherein the sealing structure comprises a sealing ring which is sealed and arranged outside the rotating shaft, and the sealing ring is also in sealing and fastening connection with the through hole of the volute and the side wall of the volute. Therefore, the tightness between the rotating shaft and the volute is ensured, no gas leakage exists, and the structure is simple and convenient to install.

Drawings

FIG. 1 is a schematic view of the overall structure of a compressor according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a compressor in an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of an inner seal ring, a first outer seal ring, and a second outer seal ring in an embodiment of the present utility model;

FIG. 4 is a schematic structural view of an inner seal ring and a second outer seal ring according to an embodiment of the present utility model;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a schematic perspective view of the outside view of the seal ring assembled with the first volute in accordance with an embodiment of the present utility model;

fig. 7 is a schematic perspective view of an inner side view of the seal ring assembled with the first volute in accordance with an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

The compressor as shown in fig. 1-2 and 6-7 comprises a power driving part and an air compressing part connected with the power driving part, wherein the power driving part comprises a casing 1 with a hollow inside and a driving motor arranged in the casing 1, the driving motor comprises a stator assembly 2 assembled in the casing and a rotor assembly 3 arranged in the stator assembly 2, the rotor assembly 3 comprises a rotating shaft 31, and the air compressing part comprises a volute with an air compressing cavity inside and an impeller 4 arranged in the air compressing cavity. The spiral case is formed by sealing and assembling a first spiral case 9 and a second spiral case 10, and the first spiral case 9 and the second spiral case 10 are positioned through a spigot; the gap between the sealing surfaces of the first volute 9 and the second volute 10 is provided with a sealing gasket 11, so that the first volute 9 and the second volute 10 can be matched in a positioning way and air leakage can be prevented. The first volute 9 is provided with a perforation communicated with the air compression cavity, and the side wall of the first volute 9 in the air compression cavity is provided with a resisting step surface 91 positioned on the outer ring of the perforation; the second volute 10 is provided with an air inlet A communicated with the air compression cavity, and an air outlet B is formed at the circumferential connection part of the outer sides of the first volute 9 and the second volute 10. The casing 1 is fixedly connected with the first volute 9, and one end of the rotating shaft 31 penetrates through a through hole in the first volute 9 and is in driving connection with the impeller 4. The air enters the air compression cavity from the air inlet A on the second volute 10, is rotationally compressed by the impeller 4 in the compressor cavity, flows out from the air outlet B, and is transferred to equipment needing compressed air through a pipeline.

In this embodiment, the compressor further includes a sealing structure for sealing the junction of the rotating shaft 31 and the through hole of the volute, and the sealing structure includes a sealing ring sealed and arranged outside the rotating shaft. The sealing ring comprises an inner sealing ring 5 and an outer sealing ring 6 fixedly connected with the inner sealing ring 5, the outer sealing ring 6 surrounds the whole inner sealing ring 5 inside, the inner sealing ring 5 is sealed and arranged outside the rotating shaft 31 and rotates together with the rotating shaft 31 at the same time, and the inner sealing ring 5 and the outer sealing ring 6 are fixed in the through holes of the volute in a sealing mode. One side of the outer sealing ring 6 is provided with a circle of annular blocking part 6A, the annular blocking part 6A of the outer sealing ring 6 is tightly and closely arranged with the blocking step surface 91, and is fixed on the blocking step surface 91 through countersunk bolts. The surface of the annular blocking part 6A, which is attached to the blocking step surface 91, is provided with a sealing groove, and a sealing ring 12 is arranged in the sealing groove to strengthen the tightness between the annular blocking part and the sealing groove and prevent gas from leaking between the outer sealing ring 6 and the first volute 9.

As shown in fig. 3-5, the outer side wall of the inner sealing ring 5 is provided with a plugging convex block 51, the inner side wall of the outer sealing ring 6 is provided with a plugging groove 52 matched with the plugging convex block 51, and the inner sealing ring 5 and the outer sealing ring 6 are fixedly connected through the plugging matching of the plugging convex block 51 and the plugging groove 52. The outer seal ring 6 is formed by splicing a first outer seal ring 61 having a semicircular shape and a second outer seal ring 62 having a semicircular shape, and the first outer seal ring 61 and the second outer seal ring 62 are positioned by the spigot and are connected by bolt fastening so as to enclose the whole inner seal ring 5 inside. Gaps exist among the inner sealing ring 5, the first outer sealing ring 6 and the second outer sealing ring 7 in the radial direction and the axial direction, convex rabbets 611 are formed on two sides of the bottom of the matching surface of the first outer sealing ring 61 and the second outer sealing ring 62 for rabbet positioning, concave rabbets 621 which are in limit fit with the convex rabbets 611 are formed on two sides of the bottom of the matching surface of the second outer sealing ring 62 and the first outer sealing ring 61 for rabbet positioning, and positioning in the radial direction and the axial direction can be realized. The rubber gasket 8 is arranged between the matching surfaces of the first outer sealing ring 61 and the second outer sealing ring 62, and the rubber gasket 8 is in a compressed state but is in transitional compression while being in bolt-on connection, so that the service life of the rubber gasket can be prolonged while the sealing performance is ensured.

Claims

1. The utility model provides a compressor, includes power drive portion and the air compression portion who is connected with power drive portion, wherein power drive portion includes inside hollow casing (1) and installs the driving motor in casing (1), driving motor includes stator module (2) and the rotor module (3) of setting in stator module (2) of assembly in casing inside, rotor module (3) include pivot (31), air compression portion includes inside the spiral case that is equipped with the air compression chamber and sets up impeller (4) in the air compression chamber, be equipped with on the spiral case with the perforation of air compression chamber intercommunication, the one end of pivot (31) pass behind the perforation on the spiral case with impeller (4) drive connection; the method is characterized in that: the sealing structure is used for sealing the joint of the rotating shaft (31) and the through hole of the volute, and comprises a sealing ring which is sealed and arranged outside the rotating shaft (31), and the sealing ring is also in sealing and fastening connection with the through hole of the volute and the side wall of the volute.

2. The compressor as set forth in claim 1, wherein: the sealing ring comprises an inner sealing ring (5) and an outer sealing ring (6) fixedly connected with the inner sealing ring (5), the outer sealing ring (6) surrounds the whole inner sealing ring (5) inside, one side of the outer sealing ring (6) is provided with a ring-shaped blocking part (6A), the inner sealing ring (5) is sealed and arranged outside the rotating shaft, the inner sealing ring (5) and the outer sealing ring (6) are fixed in the through holes of the spiral case in a sealing mode, and the ring-shaped blocking part (6A) of the outer sealing ring (6) is tightly attached to the side wall of the spiral case in a sealing mode.

3. The compressor as set forth in claim 2, wherein: the spiral case is equipped with on the lateral wall in the air compression chamber and is located keep out step face (91) of perforation outer lane, annular subsides of outer sealing ring (6) keep out portion (6A) with keep out step face (91) seal and hug closely the setting.

4. A compressor as claimed in claim 3, wherein: a sealing groove is arranged on the surface of the annular blocking part (6A) which is attached to the blocking step surface (91), and a sealing ring (12) is arranged in the sealing groove.

5. The compressor according to claim 2 or 3 or 4, wherein: the inner sealing ring (5) is provided with a plugging convex block (51) on the outer side annular wall, the inner side annular wall of the outer sealing ring (6) is provided with a plugging groove (52) matched with the plugging convex block (51), and the inner sealing ring (5) and the outer sealing ring (6) are fixedly connected through plugging matching of the plugging convex block (51) and the plugging groove (52).

6. The compressor as set forth in claim 5, wherein: the outer sealing ring (6) is formed by splicing a first semicircular outer sealing ring (61) and a second semicircular outer sealing ring (62), and the first outer sealing ring (61) and the second outer sealing ring (62) are positioned through a spigot and are fixedly connected.

7. The compressor as set forth in claim 6, wherein: the two sides of the bottom of the matching surface of the first outer sealing ring (61) and the second outer sealing ring (62) for spigot positioning are provided with convex spigot (611), and the two sides of the bottom of the matching surface of the second outer sealing ring (62) and the first outer sealing ring (61) for spigot positioning are provided with concave spigot (621) which is in limit fit with the convex spigot (611).

8. The compressor of claim 7, wherein: a rubber gasket (8) is arranged between the fastening matching surfaces of the first outer sealing ring (61) and the second outer sealing ring (62).

9. The compressor as set forth in claim 1, wherein: the spiral case is formed by sealing and assembling a first spiral case (9) and a second spiral case (10), and the first spiral case (9) and the second spiral case (10) are positioned through a spigot; the perforation is arranged on the first volute (9), and the shell (1) is also fixedly connected with the first volute (9).

10. The compressor as set forth in claim 9, wherein: a sealing gasket (11) is arranged in a gap between sealing surfaces corresponding to the first volute (9) and the second volute (10).