CN115596685A - Centrifugal compressor - Google Patents
Centrifugal compressor Download PDFInfo
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- CN115596685A CN115596685A CN202211620310.4A CN202211620310A CN115596685A CN 115596685 A CN115596685 A CN 115596685A CN 202211620310 A CN202211620310 A CN 202211620310A CN 115596685 A CN115596685 A CN 115596685A
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- volute
- assembly
- end plate
- centrifugal compressor
- impeller
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000005489 elastic deformation Effects 0.000 claims abstract description 7
- 230000000670 limiting effect Effects 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 21
- 230000006835 compression Effects 0.000 description 16
- 238000007906 compression Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 13
- 238000009434 installation Methods 0.000 description 13
- 230000007704 transition Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A centrifugal compressor includes a volute assembly and a flow directing assembly. The first side of the volute component is used for being connected with a motor of the centrifugal compressor, the flow guide component is arranged on the second side of the volute component and is provided with an airflow conduction channel guiding the flow to the volute component, and the flow guide component is provided with a vibration release portion used for releasing vibration energy through elastic deformation. The vibration energy that arouses by the motor operation can be released through the elastic deformation of the vibration release portion that sets up on the water conservancy diversion subassembly to reduce the problem that the leakproofness of each part junction that arouses by the vibration descends, and prolonged the life of each part, and then improved centrifugal compressor's efficiency, and simple structure, easy dismounting.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a centrifugal compressor.
Background
The working principle of the centrifugal compressor is as follows: when the impeller rotates at a high speed, the gas is driven to rotate along with the impeller, the gas is thrown into the diffuser under the action of centrifugal force, a vacuum zone is formed at the impeller, external fresh gas is continuously absorbed and enters the impeller, and the diffuser converts the kinetic energy of the gas into static pressure energy. The centrifugal compressor has the advantages of compact structure, small size, light weight, continuous and uniform exhaust, small vibration and the like.
As shown in fig. 1 and 2, the conventional centrifugal compressor includes an impeller 10, a diffuser 20, a first volute split body 30, a second volute split body 40, a flow guide cover plate 50, a flow guide pipe 60, an impeller cover plate 70, a motor 80, and the like, which are hermetically combined together to form a gas flow passage and compress gas. The components of the existing centrifugal compressor are independent from each other, the constraint is less, the installation is free, and the vibration energy between the components cannot be released under the working state, so that the service life of the centrifugal compressor is shortened, and the energy efficiency is reduced.
Therefore, how to release the vibration energy of the centrifugal compressor and further improve the energy efficiency of the centrifugal compressor is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a centrifugal compressor, which can release the vibration energy of the centrifugal compressor, thereby improving the energy efficiency of the centrifugal compressor.
In order to achieve the purpose, the invention provides the following technical scheme:
a centrifugal compressor comprising:
a volute assembly, a first side of the volute assembly for connection with a motor of the centrifugal compressor;
the flow guide assembly is arranged on the second side of the volute assembly and is provided with an airflow conduction channel for guiding the flow of the volute assembly, and the flow guide assembly is provided with a vibration release part for releasing vibration energy through elastic deformation.
Preferably, in the centrifugal compressor described above, the flow guide assembly includes at least:
the first end of the impeller cover plate is connected to the second side of the volute component, the second end of the impeller cover plate is provided with an impeller end plate, the impeller end plate is provided with a vibration release groove, and the impeller cover plate is provided with an impeller channel;
the honeycomb duct, the first end of honeycomb duct be provided with be used for with the first water conservancy diversion end plate of impeller end plate laminating, first water conservancy diversion end plate has and is used for the embedding vibration release portion in the vibration release groove, just the honeycomb duct have with the water conservancy diversion pipeline of impeller passageway intercommunication, air current conduction passageway includes impeller passageway with the water conservancy diversion pipeline.
Preferably, in the centrifugal compressor, the vibration releasing portion extends from the vibration releasing groove and abuts against the volute assembly to form a vibration energy conduction path between the volute assembly and the flow guide assembly.
Preferably, in the centrifugal compressor, the outer peripheral surface of the impeller end plate is provided with a flow guide pipe radial limiting portion, the flow guide pipe radial limiting portion defines a channel embedding groove, and the first flow guide end plate is used for being embedded in the channel embedding groove.
Preferably, in the centrifugal compressor described above, the vibration release groove is provided in the draft tube radial direction restricting portion.
Preferably, in the centrifugal compressor, the flow guide assembly further includes a flow guide cover plate disposed at the second end of the flow guide pipe, the flow guide cover plate is connected to the volute assembly, and a flow guide plate channel communicated with the flow guide pipe is disposed on the flow guide cover plate, and the air flow conduction channel includes the flow guide plate channel;
the second end of honeycomb duct is provided with second water conservancy diversion end plate, the outer peripheral face of second water conservancy diversion end plate is provided with the radial spacing portion of first water conservancy diversion apron, the radial spacing portion of first water conservancy diversion apron encloses into water conservancy diversion embedded groove, the water conservancy diversion apron is provided with and is used for imbedding the water conservancy diversion embedded groove's water conservancy diversion portion of inlaying.
Preferably, in the centrifugal compressor, the volute assembly is provided with a second end plate, and the first end of the impeller cover plate is provided with a volute axial direction limiting portion for being embedded in the second end plate.
Preferably, in the centrifugal compressor described above, the scroll assembly includes:
the first volute unit comprises a first end plate and an end plate connecting part, wherein the first end plate is used for being connected with the motor, and the end plate connecting part is arranged at one end, far away from the motor, of the first end plate;
the second volute unit comprises a second end plate and a volute radial limiting part arranged at the first end of the second end plate, the volute radial limiting part is used for being matched with the end plate connecting part in an embedded mode, and the flow guide assembly is arranged at the second end of the second end plate.
Preferably, in the centrifugal compressor, a volute connecting portion is surrounded at one end of the flow guide assembly, and a second end of the second end plate is provided with a second flow guide cover plate radial limiting portion for being embedded in the volute connecting portion.
Preferably, in the centrifugal compressor, the volute assembly and the flow guide assembly are connected through bolts.
The invention provides a centrifugal compressor which comprises a volute assembly and a flow guide assembly. The first side of the volute component is used for being connected with a motor of the centrifugal compressor, the flow guide component is arranged on the second side of the volute component and is provided with an airflow conduction channel guiding the airflow to the volute component, and the flow guide component is provided with a vibration releasing portion used for releasing vibration energy. The vibration energy caused by the operation of the motor can be released through the elastic deformation of the vibration release part arranged on the flow guide assembly, so that the problem of the reduction of the sealing property of the joint of each component caused by vibration is reduced, and the service life of each component is prolonged. Compared with the prior art, the centrifugal compressor provided by the invention is provided with the vibration release part, so that vibration energy can be released, the service life of the centrifugal compressor is prolonged, the energy efficiency of the centrifugal compressor is further improved, and the centrifugal compressor is simple in structure and convenient to assemble and disassemble.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional centrifugal compressor;
FIG. 2 is a schematic view of a vibration energy transfer path of a prior art centrifugal compressor;
FIG. 3 is a schematic view of a partial structure of a centrifugal compressor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a flow guide assembly according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a draft tube according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an impeller cover plate disclosed in the embodiment of the present invention;
FIG. 7 is a schematic view of a vibration energy transfer path of a centrifugal compressor according to an embodiment of the present disclosure;
FIG. 8 is a cross-sectional view of a centrifugal compressor according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a centrifugal compressor according to an embodiment of the present invention.
The system comprises a shell, a volute, a guide pipe, a guide cover plate, a guide pipe, an impeller cover plate and a motor, wherein 10 is the impeller, 20 is the diffuser, 30 is the first volute split body, 40 is the second volute split body, 50 is the guide cover plate, 60 is the guide pipe, 70 is the impeller cover plate, and 80 is the motor;
100 is a motor, 110 is an output shaft, 120 is a compression impeller, 130 is a diffuser, and 140 is a guide nose cap;
200 is a volute component, 201 is a volute chamber, 210 is a first volute unit, 211 is a first end plate, 212 is an end plate connecting part, 213 is a first output shaft through hole, 220 is a second volute unit, 221 is a second end plate, 222 is a volute radial limiting part, 223 is a second output shaft through hole, 224 is a second flow guide cover plate radial limiting part, and 225 is a sealing ring clamping groove;
300 is a flow guide component, 301 is an air flow conduction channel, 310 is a flow guide cover plate, 320 is a flow guide pipe, 321 is a vibration release part, 322 is a flow guide pipeline, 323 is a flow guide embedded groove, 324 is a first flow guide cover plate radial limiting part, 325 is a second flow guide end plate, 330 is an impeller cover plate, 331 is a channel embedded groove, 332 is a vibration release groove, 333 is an impeller channel, 334 is a volute axial limiting part, 335 is an impeller end plate, and 336 is a flow guide pipe radial limiting part.
Detailed Description
The core of the invention is to disclose a centrifugal compressor to release the vibration energy of the centrifugal compressor, thereby improving the energy efficiency of the centrifugal compressor.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
With reference to fig. 3 to 8, a centrifugal compressor according to an embodiment of the present invention includes a volute assembly 200 and a flow guiding assembly 300. The first side of the volute assembly 200 is used for being connected with the motor 100 of the centrifugal compressor, the guide assembly 300 is disposed at the second side of the volute assembly 200 and has an airflow conduction channel 301 guiding airflow to the volute assembly 200, and the guide assembly 300 is provided with a vibration releasing portion 321 for releasing vibration energy through elastic deformation. The vibration energy caused by the operation of the motor 100 can be released by the elastic deformation of the vibration releasing portion 321 provided on the guide assembly 300, so as to reduce the problem of the decrease of the sealing property at the joints of the respective components caused by the vibration and to extend the service lives of the respective components.
Compared with the prior art, the centrifugal compressor disclosed by the embodiment of the invention is provided with the vibration release part 321, so that vibration energy can be released, the service life of the centrifugal compressor is prolonged, the energy efficiency of the centrifugal compressor is further improved, and the centrifugal compressor is simple in structure and convenient to disassemble and assemble.
In one embodiment, the flow directing assembly 300 includes at least an impeller cover plate 330 and a flow directing tube 320. Referring to fig. 5, a first end of the impeller cover plate 330 is connected to a second side of the scroll assembly 200, and a second end of the impeller cover plate 330 is provided with an impeller end plate 335, and in order to better achieve the release of the vibration energy, a vibration release groove 332 is formed on the impeller end plate 335. The first end of the draft tube 320 is provided with a first flow guide end plate for being attached to the impeller end plate 335, the first flow guide end plate is provided with a vibration release portion 321 for being embedded into the vibration release groove 332, the vibration transmission between the draft tube 320 and the impeller cover plate 330 can be realized by attaching the first flow guide end plate to the impeller end plate 335, and the vibration release portion 321 can realize the release of vibration energy.
And the impeller cover plate 330 is provided with an impeller passage 333, the draft tube 320 has a guide duct 322 communicating with the impeller passage 333, and the gas flow conducting passage 301 includes the impeller passage 333 and the guide duct 322 for guiding the gas to the volute assembly 200.
As shown at D in fig. 3, the vibration releasing portion 321 extends from the vibration releasing slot 332 and abuts against the volute assembly 200 to form a vibration energy conduction path between the volute assembly 200 and the flow guide assembly 300, so that the vibration energy transmitted from the motor 100 can be transmitted through the vibration releasing portion 321 in addition to the connection between the flow guide assembly 300 and the volute assembly 200, a multi-path energy transmission manner is formed, the transmission efficiency of the vibration energy between the two is improved, and the vibration energy can be released from the vibration releasing portion 321.
As shown in fig. 7 (the two-way arrows indicate two-way transmission lines, and the one-way arrows indicate one-way transmission), the vibration energy of the centrifugal compressor disclosed in the embodiment of the present invention can be transmitted from the motor 100 to the volute assembly 200, and then transmitted to the flow guide cover plate 310, the flow guide pipe 320, and the impeller cover plate 330 via the volute assembly 200. Wherein the motor 100 transmits vibration energy to the volute assembly 200 in one direction, and the transmission of vibration energy between the volute assembly 200 and the flow guide cover plate 310, the flow guide tube 320 and the impeller cover plate 330 is performed in two directions.
Compared with the vibration energy transmission path in the prior art, the vibration release portion 321 of the embodiment of the present invention increases the bidirectional vibration energy transmission path between the volute component 200 and the draft tube 320, and distributes the vibration energy transmitted by the volute component 200 (in the prior art, the flow guide cover plate 50, the flow guide tube 60, and the impeller cover plate 70 absorb about 1/6 of the vibration energy of the motor, and the flow guide cover plate 310, the flow guide tube 320, and the impeller cover plate 330 disclosed in the embodiment of the present invention absorb about 1/8 of the vibration energy of the motor), so that the received vibration energy of each component is less and uniform, and meanwhile, the damping mechanism between the flow guide tube 320 and the impeller cover plate 330 is added, so that the vibration between the two components can be released, thereby ensuring the stability and the tightness of the overall structure of the centrifugal compressor, and prolonging the service life of the centrifugal compressor.
As shown in fig. 3E, the guide pipe radial limiting portion 336 is disposed on the outer circumferential surface of the impeller end plate 335, the guide pipe radial limiting portion 336 encloses a channel embedding groove 331, the channel embedding groove 331 can axially guide the first guide end plate, so that the first guide end plate is embedded in the channel embedding groove 331 when being installed, and the impeller cover plate 330 is connected with the guide pipe 320.
Further, the vibration release groove 332 may be opened at the radial position-limiting portion 336 of the draft tube, so that the vibration release portion 321 may extend from the vibration release groove 332 and abut against the scroll assembly 200 to transmit the vibration energy.
In a specific embodiment, the vibration releasing portion 321 includes 4 thin-walled plates extending from the vibration releasing slot 332 and abutting against the volute assembly 200, the 4 thin-walled plates are uniformly arranged along the circumference of the airflow conducting channel 301, and the contact surface for abutting against the volute assembly 200 is a surface abutting against the volute assembly 200, and the thin-walled plates can release the absorbed vibration energy. The number, type, and position of the vibration releasing portions 321 may be designed according to actual conditions.
Further, the draft tube 320 and the impeller cover plate 330 are thin-walled members, and have absorbing and buffering effects on absorbed vibration energy. The portion of the volute assembly 200 abutting the vibration release portion 321 also has certain rigidity and elasticity, and can absorb and buffer vibration.
The flow guiding assembly 300 further includes a flow guiding cover plate 310 disposed at the second end of the flow guiding pipe 320, the flow guiding cover plate 310 is connected to the volute assembly 200 and fixed by bolts, the airflow conducting channel 301 includes a flow guiding plate channel disposed on the flow guiding cover plate 310, and two ends of the flow guiding plate channel are respectively communicated with the external environment and the flow guiding pipe 322 for introducing the external gas into the volute assembly 200.
In order to improve the reliability of the installation between the draft tube 320 and the impeller cover plate 330, as shown in fig. 3 at C, the second end of the draft tube 320 is provided with a second draft end plate 325, the outer peripheral surface of the second draft end plate 325 is provided with a first draft cover plate radial limiting portion 324, the first draft cover plate radial limiting portion 324 encloses a draft embedding groove 323, the draft cover plate 310 is provided with a draft embedding portion for embedding into the draft embedding groove 323, a sealing ring for sealing is arranged between the draft embedding portion and the draft embedding groove 323, and a sealing ring clamping groove for embedding the sealing ring can be arranged on the end surface of any one of the draft embedding portion and the draft embedding groove 323 for bonding.
In order to improve the reliability of the installation between the volute assembly 200 and the impeller cover plate 330, as shown at F in fig. 3, the volute assembly 200 is provided with the second end plate 221, the first end of the impeller cover plate 330 is provided with a volute axial limiting portion 334 for being embedded with the second end plate 221, and the axial positioning between the second end plate 221 and the volute axial limiting portion 334 improves the reliability of the connection. As shown in fig. 6, the impeller cover plate 330 further includes a curved surface forming portion formed along the blade surface of the compression impeller 120, and the curved surface forming portion is connected to the volute axial direction stopper 334.
To facilitate the disassembly and assembly of the volute assembly 200, the volute assembly 200 includes a first volute unit 210 and a second volute unit 220.
The first volute unit 210 includes a first end plate 211 for connecting with the motor 100 and an end plate connecting portion 212 disposed at an end of the first end plate 211 away from the motor 100, and the second volute unit 220 includes a second end plate 221 and a volute radial direction limiting portion 222 disposed at a first end of the second end plate 221. As shown in fig. 3 a, the volute radial limiting portion 222 is configured to be fitted into the end plate connecting portion 212 and to achieve radial positioning, and the flow guiding assembly 300 is disposed at the second end of the second end plate 221. The radial limitation between the second volute unit 220 and the first volute unit 210 is increased by the embedded structure of the volute radial limiting part 222 and the end plate connecting part 212, so that the positioning between the two is more accurate, the contact area is increased, and the transmission efficiency of vibration energy is improved.
In a specific embodiment, the second end plate 221 is connected to the end plate connection portion 212 by bolts, and the connection reliability is improved by the fitting of the radial volute limiting portion 222 and the end plate connection portion 212.
With reference to fig. 3, in order to improve the sealing performance of the centrifugal compressor and reduce the leakage of gas in the circulation process of the gas flow conducting channel 301, a sealing ring clamping groove 225 is provided on the side wall of the volute radial limiting portion 222, which is attached to the end plate connecting portion 212, and a sealing ring for sealing is provided in the sealing ring clamping groove 225.
As shown at B in fig. 3, one end of the flow guiding assembly 300 is surrounded by a volute connecting portion, and a second end of the second end plate 221 is provided with a second flow guiding cover plate radial limiting portion 224 for being embedded in the volute connecting portion. Specifically, the volute connection portion is disposed at an end of the flow guide cover plate 310 close to the flow guide tube 320. The embedded structure between the second diversion cover plate radial limiting part 224 and the diversion cover plate 310 provides axial guidance during installation, and installation and positioning are facilitated; meanwhile, the contact area is increased, and the transmission efficiency of the vibration energy is improved.
A sealing ring clamping groove is formed in the end face of any one of the second end plate 221 and the volute connecting portion for attachment, and a sealing ring for sealing is arranged in the sealing ring clamping groove.
In order to improve the reliability of the connection between the volute assembly 200 and the flow guide assembly 300, the volute assembly and the flow guide assembly are connected through bolts. It should be noted that the bolt connection is only one connection method disclosed in the embodiments of the present invention, and the existing connection methods such as pin connection and snap connection can be used.
Referring to fig. 9, in a specific embodiment of the present disclosure, a centrifugal compressor includes a motor 100, a volute assembly 200, a diffuser 130, and a flow guide assembly 300. The motor 100 comprises an output shaft 110 for outputting power, a first end of the volute assembly 200 is connected with the motor 100, the output shaft 110 penetrates through the volute assembly 200 and is in transmission connection with the compression impeller 120, and the volute assembly 200 is provided with a volute chamber 201 for accommodating gas, so that the power of the motor 100 can be transmitted to the compression impeller 120 through the output shaft 110 and drives the compression impeller 120 to rotate, so as to throw the gas at the compression impeller 120 into the volute chamber 201. Guide vane passages are formed among the vanes of the compression impeller 120, the diffuser 130 is disposed at an inlet of the volute chamber 201, and two ends of the diffuser 130 are respectively communicated with the volute chamber 201 and the guide vane passages, so as to convert kinetic energy of the gas thrown out by the compression impeller 120 into static pressure energy, and introduce the converted gas into the volute chamber 201. The guide assembly 300 is disposed at the second end of the volute assembly 200, and has an airflow conduction channel 301 communicated with the guide vane channel, the airflow conduction channel 301 is communicated with the external environment, so that the energy source of the compression impeller 120 continuously attracts gas to perform gas compression, and the guide assembly 300 is provided with a vibration release portion 321 for releasing vibration energy, so that vibration caused by operation of the motor 100 can be released at the vibration release portion 321, thereby reducing the problem of decreased sealing performance at the joints of the components caused by vibration and reducing the influence on the service life of the components.
Further, the first end plate 211 is opened with a first output shaft through hole 213 for the output shaft 110 of the power supply 100 to pass through. The end plate connection 212 may be arranged in an axial direction of the first end plate 211 and form a volute chamber 201 that may accommodate compressed gas together with the first end plate 211 and the second volute unit 220. The second end plate 221 is provided with a second output shaft through hole 223 for the output shaft 110 to pass through, the second output shaft through hole 223 is communicated with the airflow conduction channel 301, the compression impeller 120 is arranged at the tail end of the airflow conduction channel 301 and is in transmission connection with the output shaft 110, and the flow guide assembly 300 is arranged at the second end of the second end plate 221 and is used for guiding the airflow to the compression impeller 120.
Further, one end of the compression impeller 120 close to the guide assembly 300 is provided with a guide nose cap 140 for guiding the gas to flow, and the guide nose cap 140 and the compression impeller 120 are coaxially arranged, so that the influence of the gas flow impact on the end surfaces of the output shaft 110 and the compression impeller 120 can be reduced.
In a specific embodiment of the present disclosure, when assembling a centrifugal compressor, the following installation steps are included:
the first volute unit 210 is first mounted on the end flange of the motor 100, and then the diffuser 130, the compression impeller 120 and the guide nose cap 140 are mounted and constrained.
The dimensions of the installation positions (a position in fig. 3) of the first volute unit 210 and the second volute unit 220 are measured and recorded for multiple times, so that the maximum value and the minimum value of the circumferences of the end plate connecting part 212 and the volute radial limiting part 222 are both within the tolerance grade range of transition fit, and the second volute unit 220 is installed and fixed by bolts after the sealing rings are added.
The dimensions of the mounting positions (F in fig. 3) of the second volute unit 220 and the impeller cover plate 330 are measured and recorded for multiple times, so as to ensure that the maximum value and the minimum value of the second output shaft through hole 223 and the circumference of the volute axial limiting part 334 are both within the tolerance grade range of transition fit, and the impeller cover plate 330 is fixed by bolts after being mounted.
The dimensions of the installation positions (positions C in the figure 3) of the flow guide cover plate 310 and the flow guide pipe 320 are measured and recorded for multiple times, so that the maximum value and the minimum value of the circumferences of the flow guide embedding part and the flow guide embedding groove 323 are both in the tolerance grade range of transition fit, and the installation between the flow guide cover plate 310 and the flow guide pipe 320 is completed.
The dimensions at which the second volute unit 220 and the draft tube 320 are installed (at D in fig. 3) are measured and recorded a plurality of times to ensure that the maximum and minimum values of the circumferences of the abutting portions of the fitting groove and the vibration releasing portion 321 of the second volute unit 220 are within the tolerance level range of the transition fitting. The dimensions of the installation positions (E positions in fig. 3) of the impeller cover plate 330 and the draft tube 320 are measured and recorded for a plurality of times to ensure that the maximum value and the minimum value of the circumferences of the embedding parts of the passage embedding groove 331 and the vibration releasing part 321 are within the tolerance grade range of transition fit, and the installation between the impeller cover plate 330 and the assembly body of the draft tube cover plate 310 and the draft tube 320 is completed.
The dimensions of the installation positions (positions B in fig. 3) of the diversion cover plate 310 and the second volute unit 220 are measured and recorded for multiple times, so that the maximum value and the minimum value of the circumferences of the embedding groove of the diversion cover plate 310 and the second diversion cover plate radial limiting portion 224 are both within the tolerance grade range of transition fit, and the assembly is completed after the upper sealing ring is added. And finishing the assembly of the whole structure.
It should be noted that the measurement of the dimensions of the above-mentioned installation sites (in fig. 3, sites a, B, C, D, E and F) can be performed in advance, and the tolerance level of the transition fit can be designed according to actual requirements.
After the centrifugal compressor is assembled, the centrifugal compressor can run in a no-load mode to check whether the problems of part friction, stud looseness, good sealing performance and the like exist, so that the centrifugal compressor meets the requirements of manufacturing processes of modern industries and can be normally used after being confirmed to be free of errors.
The material of each part of the centrifugal compressor disclosed by the embodiment of the invention can be one or more of aluminum alloy, high-carbon steel, low-carbon steel and titanium alloy so as to meet different production requirements. Compared with the connecting structure in the prior art which only has axial positioning, the connecting structure shown in A, B, C, E and F in the figure 3 increases radial positioning, improves the reliability and safety of connection, reduces relative movement among all the parts, increases the constraint among all the parts, can ensure that all the parts are combined together in a sealing way, ensures the leakage-free circulation of gas, and can properly reduce the thickness of part of the parts on the basis, thereby reducing the total weight of the compressor.
The connection mode structure of the mutual constraint is ingenious, the contact area between each part is increased, the transmission efficiency of vibration is improved, the vibration energy transmitted by the motor 100 can be shared and absorbed together, the disassembly and assembly difficulty cannot be influenced, and the service life of the centrifugal compressor is prolonged.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A centrifugal compressor, comprising:
a volute assembly (200) having a first side of the volute assembly (200) for connection with a motor (100) of the centrifugal compressor;
the flow guide assembly (300) is arranged on the second side of the volute assembly (200) and is provided with an airflow conduction channel (301) guiding the flow of the air to the volute assembly (200), and the flow guide assembly (300) is provided with a vibration releasing portion (321) used for releasing vibration energy through elastic deformation.
2. The centrifugal compressor of claim 1, wherein the flow directing assembly (300) comprises:
an impeller cover plate (330), a first end of the impeller cover plate (330) is connected to a second side of the volute component (200), a second end of the impeller cover plate (330) is provided with an impeller end plate (335), a vibration release groove (332) is arranged on the impeller end plate (335), and the impeller cover plate (330) is provided with an impeller channel (333);
honeycomb duct (320), the first end of honeycomb duct (320) be provided with be used for with the first water conservancy diversion end plate of impeller end plate (335) laminating, first water conservancy diversion end plate has and is used for the embedding in vibration release groove (332) vibration release portion (321), just honeycomb duct (320) have with water conservancy diversion pipeline (322) of impeller passageway (333) intercommunication, air current conduction passageway (301) include impeller passageway (333) with water conservancy diversion pipeline (322).
3. The centrifugal compressor of claim 2, wherein the vibration relief portion (321) extends from the vibration relief slot (332) and abuts the volute assembly (200) to form a vibration energy conduction path between the volute assembly (200) and the flow directing assembly (300).
4. The centrifugal compressor according to claim 2, wherein the outer peripheral surface of the impeller end plate (335) is provided with a flow guide tube radial direction limiting portion (336), the flow guide tube radial direction limiting portion (336) defines a passage insertion groove (331), and the first flow guide end plate is adapted to be inserted into the passage insertion groove (331).
5. The centrifugal compressor according to claim 4, wherein the vibration relief groove (332) opens to the draft tube radial direction stopper portion (336).
6. The centrifugal compressor according to claim 2, wherein the flow directing assembly (300) further comprises a flow directing cover plate (310) disposed at the second end of the flow directing tube (320), and the flow directing cover plate (310) is connected to the volute assembly (200) and is provided with a flow directing plate channel in communication with the flow directing conduit (322), the flow conducting channel (301) comprising the flow directing plate channel;
the second end of honeycomb duct (320) still is provided with second water conservancy diversion end plate (325), the outer peripheral face of second water conservancy diversion end plate (325) is provided with radial spacing portion of first water conservancy diversion apron (324), water conservancy diversion inlay groove (323) is enclosed into in radial spacing portion of first water conservancy diversion apron (324), water conservancy diversion apron (310) are provided with and are used for imbedding water conservancy diversion inlay portion in the water conservancy diversion inlay groove (323).
7. The centrifugal compressor according to claim 2, wherein the volute assembly (200) is provided with a second end plate (221), and the first end of the impeller cover plate (330) is provided with a volute axial direction restricting portion (334) for fitting with the second end plate (221).
8. The centrifugal compressor according to claim 1, wherein the volute assembly (200) comprises:
a first volute unit (210) comprising a first end plate (211) for connection with the motor (100) and an end plate connection (212) arranged at one end of the first end plate (211) remote from the motor (100);
the second volute unit (220) comprises a second end plate (221) and a volute radial limiting part (222) arranged at the first end of the second end plate (221), the volute radial limiting part (222) is used for being matched with the end plate connecting part (212) in an embedded mode, and the flow guide assembly (300) is arranged at the second end of the second end plate (221).
9. The centrifugal compressor according to claim 8, wherein one end of the flow guiding assembly (300) is surrounded by a volute connection portion, and a second end of the second end plate (221) is provided with a second flow guiding cover plate radial limiting portion (224) for being embedded in the volute connection portion.
10. The centrifugal compressor according to any one of claims 1 to 9, wherein the volute assembly (200) and the flow guide assembly (300) are connected by bolts.
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| CN202211620310.4A CN115596685B (en) | 2022-12-16 | 2022-12-16 | Centrifugal compressor |
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|---|---|
| CN115596685B (en) | 2023-03-14 |
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Denomination of invention: A centrifugal compressor Granted publication date: 20230314 Pledgee: Industrial and Commercial Bank of China Limited Hefei Luyang Branch Pledgor: RUNA SMART EQUIPMENT Co.,Ltd. Registration number: Y2024980010725 |