CN110529427B - Mounting structure of compressor impeller - Google Patents
Mounting structure of compressor impeller Download PDFInfo
- Publication number
- CN110529427B CN110529427B CN201910650215.0A CN201910650215A CN110529427B CN 110529427 B CN110529427 B CN 110529427B CN 201910650215 A CN201910650215 A CN 201910650215A CN 110529427 B CN110529427 B CN 110529427B
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- Prior art keywords
- impeller
- hole
- pull rod
- shaft sleeve
- motor rotor
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
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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
- F04D29/26—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
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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
- F04D29/26—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
- F04D29/30—Vanes
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an installation structure of a compressor impeller, which comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, an impeller, a compression nut, an adjusting pad and a balance disc, wherein the motor rotor shaft is arranged on the center pull rod; the central pull rod is connected with various rotor parts such as a centrifugal impeller, a shaft sleeve, a balance disc, a transition shaft and the like in the centrifugal refrigeration compressor, and pretightening force is applied through a compression nut. In the working process of the centrifugal refrigeration compressor, torque is transmitted among the rotor parts through plane friction, and the rotors can be normally connected and operated under the action of proper pretightening force applied to the compression nut, so that the looseness is avoided, and the safety storage of the rotor parts is reduced. The application of the central pull rod connection and plane contact interface torque transmission structure forms an invention structure, and is particularly suitable for the connection between rotor pieces in a centrifugal refrigeration compressor.
Description
Technical Field
The invention belongs to the field of compressor impeller assembly, and particularly relates to a mounting structure of a compressor impeller.
Background
In the traditional centrifugal refrigeration compressor, a gear speed-increasing connecting structure or a coupling connecting structure is widely adopted as a connecting mode of a rotor, and the application range of the centrifugal refrigeration compressor is limited by the centering problem, the complexity of parts and the assembling and disassembling repeatability. And the central pull rod connecting structure is mostly applied to modern turboprop and turboshaft engines. The rotor mainly comprises rim plate and central pull rod, connects through the face tooth (hessian tooth) between rim plate and the rim plate to connect into an organic whole through a central pull rod with each part, this central pull rod is linked together and is preloaded with each rim plate, comes the transmission moment of torsion and bears actual load through the face tooth. The arc end teeth and the center pull rod applying pretightening force are adopted to connect the rotating pieces, the structure is tensioned by the center pull rod, centering and torque transmission are carried out by the end teeth, and the center pull rod bears axial force. The structure has the advantages of reliable torque transmission, good shafting concentricity, good assembly repeatability, good rigidity, simple structure, few parts and easy assembly and disassembly.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a center pull rod connection and plane contact torque transmission pressurizing tightening nut pre-tightening structure, provides a rotor connection scheme which is suitable for ensuring that each rotor piece is safe and not loosened and has safe storage when a centrifugal refrigeration compressor works, solves a series of problems of reliable connection, simple structure, good manufacturability, convenient assembly and disassembly and the like, solves the application range of the centrifugal refrigeration compressor caused by the problems, and develops the application field of development to simpler structure, better manufacturability and more compact size.
The technical scheme of the invention is as follows: the mounting structure of the compressor impeller comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, an impeller, a compression nut, an adjusting pad and a balance disc;
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad and the impeller are sequentially sleeved on the transition shaft sleeve, the other end of the transition shaft sleeve does not exceed the central hole of the impeller after the impeller is installed in place, and the other end of the central pull rod exceeds the central hole of the impeller;
the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, the adjusting pad and the impeller on the transition shaft sleeve or the motor rotor shaft.
The mounting structure of the multistage impeller of the compressor comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, at least two impellers, at least one isolating sleeve, a compression nut, a balance disc and at least two adjusting pads; an adjusting pad and an isolating sleeve are arranged between each stage of impeller at intervals;
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad, each stage of impeller and each stage of isolation sleeve are sleeved on the transition shaft sleeve, wherein the balance disc is arranged close to the end part of the motor rotor shaft, and the adjusting pad is arranged between the balance disc and the first stage of impeller;
after the final-stage impeller is installed in place, the other end of the transition shaft sleeve does not exceed the central hole of the final-stage impeller, and the other end of the central pull rod exceeds the central hole of the final-stage impeller;
and the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, all the adjusting pads, all the isolating sleeves and all the impellers on the transition shaft sleeve or the motor rotor shaft.
Furthermore, the outer wall surface of the isolation sleeve forms a bulge, and the shape of the bulge and the impeller form a guide profile.
Furthermore, a radial gap exists between the transition shaft sleeve and the central pull rod, and the weight reduction effect of the transition shaft is achieved.
Furthermore, the outer wall surface of the compression nut is provided with a radial positioning hole for fixing the compression nut.
Furthermore, a radial shoulder is formed at one end of the transition shaft sleeve, and the balance disc, the adjusting pad and the impeller are tightly pressed on the radial shoulder.
Furthermore, a radial shoulder is formed at one end of the transition shaft sleeve, and the balance disc, all adjusting pads, all isolating sleeves and all impellers are pressed on the shoulder.
Has the advantages that: the central pull rod connecting structure for the centrifugal refrigeration compressor has the advantages of simple and reasonable structure, reliable connection, good manufacturability, convenience in assembly and disassembly, low cost and the like.
The contact plane torque transmission mode is adopted, the process requirement on torque transmission parts is reduced, the coaxiality of a shaft system is high, the integral dynamic balance of the rotor is good, and the dynamic characteristic of the rotor is good.
All rotor parts are in face-to-face contact, the structure is compact, and the transition shaft structure with a hollow design is adopted, so that the total weight of the rotor is reduced.
And a special pretightening force applying tool is adopted, so that the accuracy of the pretightening force applying value is ensured, and certain safety reserve of each part of the rotor under the condition of safe work is ensured.
The central pull rod is simple in connection structure, low in cost, convenient to install, good in practicability, easy to popularize and apply and high in practical value, and the application field is developed.
Drawings
FIG. 1 is a view showing a coupling structure of a compressor impeller according to the present invention;
fig. 2 is a connection structure view of a multi-stage impeller of a compressor according to the present invention.
Wherein: 1-motor rotor shaft, 2-transition shaft sleeve, 3-balance disc, 4-adjusting pad, 5-impeller, 6-gland nut, 7-central pull rod, 8-first-stage adjusting pad, 9-first-stage impeller, 10-isolation sleeve, 11-final-stage adjusting pad and 12-final-stage impeller.
Detailed Description
Embodiment 1, as shown in fig. 1, provides a mounting structure of a compressor impeller, which includes a motor rotor shaft 1, a transition shaft sleeve 2, a central pull rod 7, an impeller 5, a compression nut 6, an adjusting pad 4 and a balance disk 3;
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad and the impeller are sequentially sleeved on the transition shaft sleeve, the other end of the transition shaft sleeve does not exceed the central hole of the impeller after the impeller is installed in place, and the other end of the central pull rod exceeds the central hole of the impeller;
the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, the adjusting pad and the impeller on the transition shaft sleeve or the motor rotor shaft.
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad, each stage of impeller and each stage of isolation sleeve are sleeved on the transition shaft sleeve, wherein the balance disc is arranged close to the end part of the motor rotor shaft, and the adjusting pad is arranged between the balance disc and the first stage of impeller;
after the final-stage impeller is installed in place, the other end of the transition shaft sleeve does not exceed the central hole of the final-stage impeller, and the other end of the central pull rod exceeds the central hole of the final-stage impeller;
and the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, all the adjusting pads, all the isolating sleeves and all the impellers on the transition shaft sleeve or the motor rotor shaft.
Claims (9)
1. A mounting structure of a compressor impeller is characterized in that: the device comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, an impeller, a compression nut, an adjusting pad and a balance disc;
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad and the impeller are sequentially sleeved on the transition shaft sleeve, the other end of the transition shaft sleeve does not exceed the central hole of the impeller after the impeller is installed in place, and the other end of the central pull rod exceeds the central hole of the impeller;
the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, the adjusting pad and the impeller on the transition shaft sleeve or the motor rotor shaft.
2. A mounting structure of a compressor wheel according to claim 1, wherein: a radial gap exists between the transition shaft sleeve and the central pull rod.
3. A mounting structure of a compressor wheel according to claim 1, wherein: and the outer wall surface of the compression nut is provided with a radial positioning hole.
4. A mounting structure of a compressor wheel according to claim 1, wherein: one end of the transition shaft sleeve is provided with a radial convex shoulder, and the balance disc, the adjusting pad and the impeller are tightly pressed on the radial convex shoulder.
5. The utility model provides a mounting structure of multistage impeller of compressor which characterized in that: the device comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, at least two impellers, at least one isolation sleeve, a compression nut, a balance disc and at least two adjusting pads; an adjusting pad and an isolating sleeve are arranged between each stage of impeller at intervals;
the shaft end of the motor rotor shaft is provided with an axial step hole, a small hole of the step hole is an internal thread hole, and a large hole of the step hole is a positioning hole;
the two ends of the central pull rod are provided with external threads, the thread turning directions of the two ends are the same, the external threads at one end are fastened with the threads of the internal thread hole of the motor rotor shaft, and the thread turning direction at one end is opposite to the rotating direction of the motor rotor shaft;
the transition shaft sleeve is sleeved outside the central pull rod, and the outer diameter of one end of the transition shaft sleeve is matched with the inner diameter of the large hole and is positioned in the large hole; the balance disc, the adjusting pad, each stage of impeller and each stage of isolation sleeve are sleeved on the transition shaft sleeve, wherein the balance disc is arranged close to the end part of the motor rotor shaft, and the adjusting pad is arranged between the balance disc and the first stage of impeller;
after the final-stage impeller is installed in place, the other end of the transition shaft sleeve does not exceed the central hole of the final-stage impeller, and the other end of the central pull rod exceeds the central hole of the final-stage impeller;
and the compression nut is in threaded fit with the other end of the central pull rod, and compresses the balance disc, all the adjusting pads, all the isolating sleeves and all the impellers on the transition shaft sleeve or the motor rotor shaft.
6. A mounting structure of a multistage impeller of a compressor in accordance with claim 5, wherein: the outer wall surface of the isolation sleeve forms a bulge, and the shape of the bulge and the impeller form a guide profile.
7. A mounting structure of a multistage impeller of a compressor in accordance with claim 5, wherein: a radial gap exists between the transition shaft sleeve and the central pull rod.
8. A mounting structure of a multistage impeller of a compressor in accordance with claim 5, wherein: and the outer wall surface of the compression nut is provided with a radial positioning hole.
9. A mounting structure of a multistage impeller of a compressor in accordance with claim 5, wherein: one end of the transition shaft sleeve is provided with a radial shoulder, and the balance disc, all the adjusting pads, all the isolating sleeves and all the impellers are tightly pressed on the shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650215.0A CN110529427B (en) | 2019-07-18 | 2019-07-18 | Mounting structure of compressor impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650215.0A CN110529427B (en) | 2019-07-18 | 2019-07-18 | Mounting structure of compressor impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110529427A CN110529427A (en) | 2019-12-03 |
| CN110529427B true CN110529427B (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910650215.0A Active CN110529427B (en) | 2019-07-18 | 2019-07-18 | Mounting structure of compressor impeller |
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| CN (1) | CN110529427B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397888B (en) * | 2020-04-30 | 2022-07-12 | 庆安集团有限公司 | Rotation detection device and detection method for magnetic suspension centrifugal compressor |
| CN113107676B (en) * | 2021-05-19 | 2022-05-27 | 中国科学院工程热物理研究所 | Three-layer sleeve type central pull rod device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100414102B1 (en) * | 2001-08-17 | 2004-01-07 | 엘지전자 주식회사 | Structure for engaging impeller in turbo compressor |
| GB2392477A (en) * | 2002-08-24 | 2004-03-03 | Alstom | Turbocharger |
| CN104373378B (en) * | 2014-09-11 | 2016-07-27 | 大连工业大学 | Centrifugal compressor half-opened impeller and the connecting device of main shaft, rotor and installation method |
| CN205663652U (en) * | 2015-11-25 | 2016-10-26 | 苏州欧拉工程技术有限公司 | Connection structure and compressor of compressor impeller and main shaft |
| CN108884838B (en) * | 2016-01-20 | 2021-02-05 | 三菱重工发动机和增压器株式会社 | Fixed stationary blade type rotary machine and method for assembling fixed stationary blade type rotary machine |
| CN206129715U (en) * | 2016-11-09 | 2017-04-26 | 烟台荏原空调设备有限公司 | Centrifugal compressor and guiding device thereof |
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- 2019-07-18 CN CN201910650215.0A patent/CN110529427B/en active Active
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| Publication number | Publication date |
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| CN110529427A (en) | 2019-12-03 |
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