CN117536896A - Multistage centrifugal compressor and compressor unit - Google Patents
Multistage centrifugal compressor and compressor unit Download PDFInfo
- Publication number
- CN117536896A CN117536896A CN202311512922.6A CN202311512922A CN117536896A CN 117536896 A CN117536896 A CN 117536896A CN 202311512922 A CN202311512922 A CN 202311512922A CN 117536896 A CN117536896 A CN 117536896A
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- China
- Prior art keywords
- compression
- medium
- cooling
- centrifugal compressor
- multistage centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001816 cooling Methods 0.000 claims abstract description 108
- 238000007906 compression Methods 0.000 claims abstract description 106
- 230000006835 compression Effects 0.000 claims abstract description 105
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
Classifications
-
- 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
- F04D17/12—Multi-stage pumps
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
Abstract
The application provides a multistage centrifugal compressor and a compressor unit, wherein the multistage centrifugal compressor comprises a first compression assembly, a second compression assembly, a connecting channel and a built-in cooling piece, and the first compression assembly is used for compressing a medium into a first compression medium; the second compression assembly is used for compressing the first compression medium; the connecting channel is used for connecting the first compression assembly and the second compression assembly so as to transfer the first compression medium to the second compression assembly; the built-in cooling piece is arranged close to the connecting channel and can absorb heat of the first compression medium in the connecting channel. When the medium is compressed by the first compression component to form a first compression medium, and when the first compression medium flows to the second compression medium, the first compression medium is cooled by the built-in cooling piece, and the compressed first compression medium flows to the second compression component through the internal flow passage of the casing, so that the pressure loss in the medium circulation process is reduced, the flow path is reduced, the flow resistance is reduced, and meanwhile, the power consumption and the noise are reduced.
Description
Technical Field
The application relates to the technical field of compressors, in particular to a multistage centrifugal compressor and a compressor unit.
Background
In a multistage centrifugal compressor, gas to be compressed flows into an external intercooler through a connecting pipeline after being compressed in a first stage, flows back to a next stage for compression after being cooled by the external intercooler, and needs a pipeline to lead out the gas for each compression, flows to the external intercooler for cooling, and then flows to the next stage for compression. This structure is relatively large and results in a large pressure loss and a large flow resistance, and at the same time, relatively high power consumption and noise are brought about.
Disclosure of Invention
In view of this, the present application provides a multistage centrifugal compressor, which solves the problems of larger pressure loss and larger flow resistance in the compression process of the compressor, and simultaneously brings higher power consumption and noise. The application also provides a compressor unit comprising the multistage centrifugal compressor.
In order to achieve the above purpose, the present application provides the following technical solutions:
a multi-stage centrifugal compressor comprising:
a first compression assembly for compressing a medium into a first compressed medium;
a second compression assembly for compressing the first compression medium;
a connecting passage for connecting the first compression assembly and the second compression assembly to transfer the first compression medium to the second compression assembly;
and the built-in cooling piece is arranged close to the connecting channel and can absorb heat of the first compression medium in the connecting channel.
Optionally, the built-in cooling piece is a spiral cooling pipe, and a cooling medium is guided in the spiral cooling pipe.
Optionally, the multistage centrifugal compressor further comprises a motor disposed adjacent to and thermally conductive with the built-in cooling element.
Optionally, the motor is located inside the spiral cooling tube, and the connection channel is located outside the spiral cooling tube.
Optionally, the side wall of the connecting channel is a heat conducting shell.
Optionally, a vane guiding the first compressed medium to flow spirally is disposed in the connection channel.
Optionally, the connecting channel is of an integral structure.
Optionally, the multistage centrifugal compressor further comprises a cooling fan for cooling the first compression medium in the connection channel and the motor of the multistage centrifugal compressor.
A compressor package comprising an external cooling element and a multistage centrifugal compressor as claimed in any one of the preceding claims.
Optionally, the external cooling piece is connected with the multistage centrifugal compressor, and the external cooling piece is used for cooling the medium compressed by the second compression assembly.
The utility model provides a multistage centrifugal compressor through setting up built-in cooling spare in multistage centrifugal compressor, forms first compression medium after the medium compresses through first compression subassembly, when first compression medium flows to second compression medium, through built-in cooling spare cooling first compression medium, first compression medium after the compression passes through casing inside runner flow direction second compression subassembly, gas can be cooled by built-in cooling spare when flowing in the runner, intercooler and too much connecting tube between each stage before having cancelled to reduce the pressure loss of medium circulation in-process, thereby reduce the circulation route and reduce flow resistance, reduce consumption and noise simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
Fig. 1 is a sectional view of a compressor unit provided in the present embodiment;
FIG. 2 is an enlarged view of a portion of a multistage centrifugal compressor;
FIG. 3 is a front view of the built-in cooling member and motor;
fig. 4 is a front view of the connecting channel.
In fig. 1-4:
1-multistage centrifugal compressor, 2-external cooling piece;
11-a first compression assembly, 12-a second compression assembly, 13-a connecting channel, 14-a built-in cooling piece, 15-a motor;
131-heat conductive shell, 132-blade.
Detailed Description
The application provides a multistage centrifugal compressor. The application also provides a compressor unit comprising the multistage centrifugal compressor.
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
As shown in fig. 1 to 4, the embodiment of the present application provides a multistage centrifugal compressor 1, which sucks and compresses gas or vapor by generating centrifugal force by rotation of a rotor. In a multistage centrifugal compressor 1, the gas or vapor is subjected to a plurality of compression stages, each stage having a centrifugal rotor. The centrifugal rotor of each stage compresses the gas or vapor to a higher pressure and then passes it to the next stage for further compression. By multi-stage compression, the pressure of the gas or vapor can be increased to a higher level while reducing energy loss and improving compression efficiency. The multistage centrifugal compressor 1 mainly includes a first compression assembly 11, a second compression assembly 12, a connection passage 13, and a built-in cooling member 14. Wherein the first compression assembly 11 is used for compressing the medium into a first compressed medium; the second compression assembly 12 is used for compressing the first compression medium; the connecting passage 13 is used to connect the first compression assembly 11 and the second compression assembly 12 to transfer the first compression medium to the second compression assembly 12; the built-in cooling member 14 is disposed close to the connection passage 13 and is capable of absorbing heat of the first compression medium in the connection passage 13. Specifically, in the process of compressing the medium by using the multistage centrifugal compressor 1, the medium is first compressed into a first compressed medium by the first compression component 11, then the first compressed medium flows through the connecting channel 13 in the multistage centrifugal compressor 1, in this embodiment, the connecting channel 13 is disposed close to the built-in cooling member 14, so that during the process of flowing the first compressed medium, the built-in cooling member 14 absorbs heat of the first compressed medium in the connecting channel 13 to cool the first compressed medium, so that when the first compressed medium in the connecting channel 13 flows to the second compression component 12 for secondary compression, the temperature of the first compressed medium is reduced to a suitable temperature, and then the second compression component 12 compresses the first compressed medium cooled by the built-in cooling member 14.
The built-in cooling element 14 may be a liquid-cooled cooling element or an air-cooled cooling element, and preferably the built-in cooling element 14 is a liquid-cooled cooling element, so that the cooling effect of the built-in cooling element 14 on the first compression medium can be improved.
It should be noted that, regarding the manner in which the connection channel 13 and the built-in condenser are disposed close to each other, the connection channel 13 may be disposed close to the built-in condenser, and the walls of both may be heat-conducting pipes; further, in order to enhance the condensing effect of the built-in condensing member on the first compressed medium in the connecting channel 13, one may be spirally disposed on the pipe wall of the other.
The first compression assembly 11 and the second compression assembly 12 each include a member for compressing a medium, such as an impeller.
It should be noted that the medium mentioned in this embodiment is usually a gas.
The compressor with the structure is characterized in that the built-in cooling piece 14 is arranged in the multistage centrifugal compressor 1, when a medium is compressed by the first compression component 11 to form a first compression medium, when the first compression medium flows to the second compression medium, the first compression medium is cooled by the built-in cooling piece 14, the compressed first compression medium flows to the second compression component 12 through the internal flow passage of the shell, and gas is cooled by the built-in cooling piece 14 while flowing in the flow passage, so that an intercooler and an excessive connecting pipeline between the previous stages are omitted, the pressure loss in the medium circulation process is reduced, the flow path is reduced, the flow resistance is reduced, and meanwhile, the power consumption and the noise are reduced.
In some embodiments, the built-in cooling member 14 is a spiral cooling tube having a cooling medium directed therein. Specifically, the built-in cooling member 14 is configured as a spiral cooling pipe, and the spiral cooling pipe is disposed at the outer side or the inner side of the connection channel 13, so as to increase the contact area between the spiral cooling pipe and the connection channel 13, thereby improving the cooling effect of the cooling medium managed in the spiral cooling pipe on the first compression medium in the connection channel 13.
In some embodiments, the multistage centrifugal compressor 1 further comprises an electric motor 15 disposed close to the built-in cooling element and thermally conductive with the built-in cooling element 14. Specifically, on the premise that the built-in condensing element cools the first compressed medium in the connecting channel 13, the motor 15 is also arranged close to the spiral cooling pipe, so that the built-in condensing element can cool the motor 15 while cooling the first compressed medium in the connecting channel 13, and the built-in condensing element plays a double cooling role.
In some embodiments, the motor 15 is located inside the helical cooling tube and the connecting channel 13 is located outside the helical cooling tube. Specifically, in this embodiment, the motor 15 is disposed on the inner side of the spiral cooling tube, the connection channel 13 is disposed on the outer side of the spiral cooling tube, so that the spiral cooling tube can cool the motor 15 and the first compression medium in the connection channel 13 at the same time, the cooling effect of the built-in cooling member 14 is further improved, and the connection channel 13, the built-in cooling member 14 and the second compression assembly 12 can be arranged in the multistage centrifugal compressor 1 more compactly, so that the overall volume of the multistage centrifugal compressor 1 is reduced. The motor 15 is positioned at the inner side of the spiral cooling pipe, the connecting channel 13 is positioned at the outer side of the spiral cooling pipe, and the contact area of the built-in condensation piece, the communication pipeline and the motor 15 can be furthest improved, so that the cooling effect of the built-in cooling piece 14 on the motor 15 and the first compression medium in the connecting channel 13 is improved.
It should be noted that, the built-in cooling member 14 is configured as a spiral tubular structure, the outer wall of the motor 15 is attached to the inner wall of the spiral tubular structure, and the inner wall of the connection channel 13 is attached to the outer wall of the spiral tubular structure, so that the cooling effect of the built-in cooling member 14 on the motor 15 and the first compression medium in the connection channel 13 is further improved.
In some embodiments, the side walls of the connection channel 13 are thermally conductive housings 131. Specifically, the side wall of the connecting channel 13 is set as a heat conducting shell 131, so that on one hand, heat exchange between the inner wall of the connecting channel 13 and the outer wall of the spiral cooling pipe is facilitated, and cooling of the first compression medium in the connecting channel 13 by the cooling medium in the spiral cooling pipe is accelerated; on the other hand, the outer wall of the connection channel 13 is also provided with the heat conducting shell 131, so that heat exchange between the first compression medium in the connection channel 13 and the outer wall side can be accelerated, and the cooling efficiency of the first compression medium is further improved.
In some embodiments, vanes 132 are provided in the connecting channel 13 to guide the spiral flow of the first compressed medium. Specifically, the vane 132 for guiding the first compressed medium to flow spirally is disposed in the connection channel 13, so that the flow path of the first compressed medium in the connection channel 13 can be prolonged, and meanwhile, the cooling time of the built-in cooling member 14 to the first compressed medium in the connection channel 13 is prolonged, so that the cooling effect of the built-in cooling member 14 to the first compressed medium in the connection channel 13 is improved.
It should be noted that, the plurality of blades 132 in the connecting channel 13 are provided, and a channel for the first compressed medium to flow is formed between adjacent blades 132; further, the distances between the adjacent blades 132 are equal, so that the sizes of the channels formed by the adjacent blades 132 for the flow of the first compressed medium are the same, and the flow of the first compressed medium between the adjacent blades 132 in the connecting channel 13 is smoother.
In addition, the blades 132 may be shaped or otherwise provided, such as a zigzag shape, a wavy shape, a diagonal shape, or the like, in which the blades 132 are arranged along the length of the connection passage 13.
In some embodiments, the connecting channel 13 is a unitary structure. Specifically, the connecting channel 13 is provided with an integral structure, so that the air tightness of the connecting channel 13 can be improved, and the first compressed medium can be prevented from leaking from the connecting channel 13 when the first compressed medium flows in the connecting channel 13. Moreover, the connecting channel 13 is arranged into an integrated structure, and the material of the connecting channel 13 is a heat conducting material, so that the internal condensation piece can be lifted to cool the first compression medium in the connecting channel 13, and the local overhigh temperature of the first compression medium in the connecting channel 13 can be avoided, so that the overall temperature of the first compression medium in the connecting channel 13 is balanced.
In some embodiments, the multistage centrifugal compressor 1 further comprises a cooling fan (not shown in the figures) for cooling the first compression medium in the connection channel 13 and the motor 15 of the multistage centrifugal compressor 1. Specifically, on the premise that the motor 15 and the first compression medium in the connecting channel 13 are cooled by the built-in condensation piece, a cooling fan is further arranged, the cooling fan is arranged in the multistage centrifugal compressor 1, the cooling fan can strengthen the gas flow rate in the multistage centrifugal compressor, accelerate air convection and bring out the heat of the motor 15 and the first compression medium in the connecting channel 13, so that the cooling effect on the motor 15 and the first compression medium in the connecting channel 13 is further improved.
Further, a guide plate is arranged in the multistage centrifugal compressor 1, and plays a role in guiding wind blown by the cooling fan, so that the air circulation speed in the multistage centrifugal compressor 1 is further improved, and the cooling effect on the motor 15 and the first compression medium in the connecting channel 13 is further improved.
A compressor unit includes a multistage centrifugal compressor 1 and an external cooling member 2. Since the compressor unit includes the multistage centrifugal compressor 1 described above, the beneficial effects of the compressor unit caused by the multistage centrifugal compressor 1 can be seen from the above, and will not be described herein.
In some embodiments, the external cooling element 2 is connected to the multistage centrifugal compressor 1, and the external cooling element 2 is used to cool the medium compressed by the second compression assembly 12. Specifically, in the process of compressing the medium by using the multistage centrifugal compressor 1, the medium is first compressed into a first compressed medium by the first compression component 11, then the first compressed medium flows through the connection channel 13 in the multistage centrifugal compressor 1, the connection channel 13 is disposed close to the internal cooling element 14 in the embodiment of the multistage centrifugal compressor 1, so that during the process of flowing the first compressed medium, the internal cooling element 14 absorbs heat of the first compressed medium located in the connection channel 13 to cool the first compressed medium, so that the temperature of the first compressed medium in the connection channel 13 is reduced to a suitable temperature when flowing to the second compression component 12 for secondary compression, then the second compression component 12 compresses the first compressed medium cooled by the internal cooling element 14, and after the first compressed medium cooled by the internal cooling element 14 is compressed by the second compression component 12, the medium compressed by the second compression component 12 is transmitted to the external cooling element 2 through a pipeline to cool the second compression component 12, so as to realize the cooling of the compressed medium of the second compression component 12.
It should be noted that the external cooling element 2 is an intercooler, which is a device for reducing the temperature of a fluid, and is commonly found in a thermal energy conversion system and a hydraulic system. It reduces the temperature of the fluid to a desired range by exchanging heat between the hot fluid and the cooling medium to maintain proper operation and performance of the system.
In thermal energy conversion systems, charge air coolers are commonly used in automotive engines, turbochargers, air compressors and the like. These devices generate a lot of heat during operation and require the use of an intercooler for cooling in order to prevent damage to the system and components due to excessive temperatures. The intercooler can remove heat from the fluid by circulating cooling water or cooling medium such as air, so that the temperature of the fluid is reduced.
In hydraulic systems, charge air coolers are commonly used in hydraulic pumps, hydraulic motors, hydraulic valves and the like. The hydraulic system can generate a large amount of heat in the working process, if the hydraulic system is not cooled in time, the temperature of hydraulic oil can be increased, the system efficiency and the working stability are reduced, and even the oil aging and the component damage are caused. The intercooler can be used for reducing the temperature of hydraulic oil to a proper range through circulating cooling liquid or cooling media such as air, and the normal operation of the system is maintained.
The design and selection of the intercooler may take into account factors such as the thermal load of the fluid, the temperature and flow rate of the cooling medium, the space constraints of the apparatus, etc. Common intercooler types include radiators, cooling towers, cooler modules, etc., with the particular choice depending on the requirements and conditions of the application.
The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not intended to be limited to the details disclosed herein as such.
The block diagrams of the devices, apparatuses, devices, systems referred to in this application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent to the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It should be understood that the terms "first," "second," "third," "fourth," "fifth," and "sixth" used in the description of the embodiments of the present application are merely used for clarity in describing the technical solutions, and are not intended to limit the scope of the present application.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (10)
1. A multistage centrifugal compressor, comprising:
a first compression assembly for compressing a medium into a first compressed medium;
a second compression assembly for compressing the first compression medium;
a connecting passage for connecting the first compression assembly and the second compression assembly to transfer the first compression medium to the second compression assembly;
and the built-in cooling piece is arranged close to the connecting channel and can absorb heat of the first compression medium in the connecting channel.
2. The multistage centrifugal compressor according to claim 1, wherein the built-in cooling member is a spiral cooling pipe, and a cooling medium is guided in the spiral cooling pipe.
3. The multi-stage centrifugal compressor of claim 2, further comprising a motor disposed proximate to and thermally conductive with the built-in cooling member.
4. A multistage centrifugal compressor according to claim 3, wherein the motor is located inside the spiral cooling tube and the connection channel is located outside the spiral cooling tube.
5. The multi-stage centrifugal compressor according to claim 1, wherein the side walls of the connecting channels are thermally conductive shells.
6. The multistage centrifugal compressor according to claim 1, wherein blades that guide the spiral flow of the first compression medium are provided in the connection passage.
7. The multistage centrifugal compressor according to claim 1, wherein said connecting channels are of unitary construction.
8. The multistage centrifugal compressor according to claim 1, further comprising a cooling fan for cooling the first compression medium and the motor of the multistage centrifugal compressor in the connection passage.
9. A compressor package comprising an external cooling element and a multistage centrifugal compressor according to any one of claims 1 to 8.
10. The compressor assembly of claim 9, wherein the external cooling member is coupled to the multi-stage centrifugal compressor, the external cooling member configured to cool the medium compressed by the second compression assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311512922.6A CN117536896A (en) | 2023-11-13 | 2023-11-13 | Multistage centrifugal compressor and compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311512922.6A CN117536896A (en) | 2023-11-13 | 2023-11-13 | Multistage centrifugal compressor and compressor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117536896A true CN117536896A (en) | 2024-02-09 |
Family
ID=89795189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311512922.6A Pending CN117536896A (en) | 2023-11-13 | 2023-11-13 | Multistage centrifugal compressor and compressor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117536896A (en) |
-
2023
- 2023-11-13 CN CN202311512922.6A patent/CN117536896A/en active Pending
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