CN110762051B - Surging prevention structure of magnetic suspension air compressor - Google Patents
Surging prevention structure of magnetic suspension air compressor Download PDFInfo
- Publication number
- CN110762051B CN110762051B CN201911278297.7A CN201911278297A CN110762051B CN 110762051 B CN110762051 B CN 110762051B CN 201911278297 A CN201911278297 A CN 201911278297A CN 110762051 B CN110762051 B CN 110762051B
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- China
- Prior art keywords
- air inlet
- air
- end cover
- inlet channel
- volute
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- 239000000725 suspension Substances 0.000 title claims abstract description 9
- 230000002265 prevention Effects 0.000 title abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000005339 levitation Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- 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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
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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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a surging prevention structure of a magnetic suspension air compressor, which comprises a volute, an air inlet channel, an impeller, an end cover, a limiting block, a displacement sensor, a first air inlet and a second air inlet, wherein the first air inlet and the second air inlet are connected with an air outlet pipeline of the compressor; wherein, spiral case internal diameter and intake duct external diameter sliding fit are provided with displacement sensor in the intake duct, are provided with the end cover on the spiral case, are provided with first air inlet on the spiral case, are provided with the stopper on the end cover, are provided with the second air inlet on the end cover, and when first air inlet lets in pressure air, the intake duct rises under the pressure air effect, and intake duct and impeller clearance are the biggest this moment, and when the second air inlet lets in pressure air, the intake duct descends under the pressure air effect, and intake duct and impeller clearance are the minimum this moment. According to the invention, the air inlet direction and the air inlet amount of the air inlet are regulated, so that the size of a gap between the air inlet channel of the compressor and the impeller blade is influenced, and the surge can be effectively and conveniently controlled.
Description
Technical Field
The invention belongs to the field of compressors, and particularly relates to a surge-preventing structure of a magnetic suspension air compressor.
Background
Surging is the vibration of a turbine compressor (also called a vane compressor) under an abnormal condition that occurs when the flow is reduced to some extent. When the rotation speed is fixed, the feeding of the compressor is reduced to a certain value, so that the speed of gas in the blade path is uneven and backflow occurs, when the phenomenon is expanded to the whole blade path, the gas flow in the blade path cannot be discharged, so that the pressure in the compressor stage is suddenly reduced, the relatively high pressure after the stage reversely presses the gas flow back into the stage, the pressure in the stage is recovered to be normal, the impeller works normally, and the reversely-flowing gas flow is discharged again. After that, the pressure in the stage suddenly drops and the air flow is reversed again, and the phenomenon repeatedly occurs, and the compressor works unstably, and the phenomenon becomes a surge phenomenon.
Typical phenomena when a compressor is surging are:
(1) The outlet pressure of the compressor is firstly increased, then is rapidly decreased and is periodically and greatly fluctuated;
(2) The flow of the compressor is suddenly reduced and greatly fluctuates, and even air flows backward to the air suction pipeline when serious;
(3) The current and power meter of the motor dragging the compressor indicate the occurrence of instability and great fluctuation;
(4) The machine produces intense vibrations and at the same time produces abnormal air flow noise.
Short term surging does not have a significant impact on the compressor, except for changing the thrust level. Long term surge, however, can accelerate fatigue of the compressor internals and rapidly propagate existing cracks, which can lead to irreparable damage or even explosion of the engine.
Currently, three methods for solving surge are commonly used:
(1) A bleed valve is added on the air compressor, so that redundant air can be discharged;
(2) Using a twin or triple rotor compressor;
(3) An adjustable blade is used.
Disclosure of Invention
The invention aims to: aiming at the problem of surging of a blade compressor in the prior art, the invention discloses a novel structure for preventing surging of a magnetic suspension air compressor.
The technical scheme is as follows: the invention adopts the following technical scheme: a surging prevention structure of a magnetic suspension air compressor comprises a volute, an air inlet channel, an impeller, an end cover, a limiting block, a displacement sensor, a first air inlet and a second air inlet, wherein the first air inlet and the second air inlet are connected with an air outlet pipeline of the compressor; the spiral case internal diameter and intake duct external diameter sliding fit are provided with displacement sensor in the intake duct, are provided with the end cover on the spiral case, are provided with first air inlet on the spiral case, are provided with the stopper on the end cover, are provided with the second air inlet on the end cover.
Preferably, the limiting block is arranged at the contact surface of the air inlet channel and the end cover, so that the rising height of the air inlet channel can be limited.
Preferably, the volute and the end cover are fixed through screws, and the end cover and the limiting block are fixed through screws.
Preferably, the contact surfaces between the volute and the air inlet channel, between the volute and the end cover and between the air inlet channel and the end cover are sealed by sealing rings.
Preferably, when the first air inlet is filled with pressure air, the air inlet channel rises under the action of the pressure air and rises to the highest position of the air inlet channel when the air inlet channel contacts with the limiting block, and at the moment, the gap between the air inlet channel and the impeller is the largest.
Preferably, when the second air inlet is filled with the pressure air, the air inlet channel descends under the action of the pressure air and descends to the lowest position of the air inlet channel when falling on the end face of the volute, and at the moment, the gap between the air inlet channel and the impeller is the smallest.
The beneficial effects are that: the invention has the following beneficial effects:
(1) According to the invention, the air inlet direction and the air inlet amount of the air inlet are regulated, so that the size of a gap between the air inlet channel of the compressor and the impeller is influenced, and the air leakage amount is regulated, so that the surge can be effectively and conveniently controlled;
(2) On the basis of the original compressor, only two air inlets, the displacement sensor, the end cover and the limiting block are needed to be added, so that the original structure is not greatly changed, and the installation and the implementation are easy.
Drawings
FIG. 1 is a schematic view of the structure of the present invention with minimal clearance between the inlet and impeller;
FIG. 2 is an enlarged schematic view of the structure at A when the clearance between the inlet and the impeller is maximum in the present invention;
the device comprises a volute 1, an air inlet 2, an impeller 3, an end cover 4, a limiting block 5, a displacement sensor 6, an air inlet and impeller gap 8, a first air inlet 9, a second air inlet 10, a rotor 12, an air inlet lowest position 13 and an air inlet highest position 14.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The size of the gap 8 between the air inlet channel of the compressor and the impeller influences the size of the air inlet: the gap is large in leakage amount, the gap is small in leakage amount, and the leakage amount influences the air inflow, so that the air inflow direction of the air inlet and the air inflow are adjusted to adjust the gap 8 between the air inlet of the compressor and the impeller, and the surge of the system is controlled.
The invention discloses a surging prevention structure of a magnetic suspension air compressor, which is shown in fig. 1 and comprises a volute 1, an air inlet passage 2, an impeller 3, an end cover 4, a limiting block 5, a displacement sensor 6, a first air inlet 9 and a second air inlet 10 which are connected with an air outlet pipeline of the compressor.
Wherein, spiral case 1 internal diameter and intake duct 2 external diameter sliding fit are provided with displacement sensor 6 in the intake duct 2, and displacement sensor 6 detects the position of intake duct 2, is provided with first air inlet 9 on the spiral case 1 through screw connection end cover 4 on the spiral case 1, through screw connection stopper 5 on the end cover 4, stopper 5 sets up in the contact surface department of intake duct 2 and end cover 4, can restrict the height that the intake duct risen, is provided with second air inlet 10 on the end cover 4, and the contact surface between spiral case 1 and intake duct 2, spiral case 1 and end cover 4, intake duct 2 and end cover 4 is sealed with the sealing washer.
The position of the inlet 2 can be adjusted between an inlet lowest position 13 and an inlet highest position 14.
As shown in fig. 2, the air inlet 2 is spaced from the bottom surface of the limiting block 5 by a distance, when the first air inlet 9 is filled with pressure air, the air inlet 2 rises under the action of the pressure air, and when the air inlet contacts with the limiting block 5, the air inlet rises to the highest position 14 of the air inlet, and then the air inlet and the impeller gap 8 is the largest.
As shown in fig. 1, the air inlet 2 is spaced from the end face of the volute 1 by a distance, when the second air inlet 10 is filled with pressure air, the air inlet 2 descends under the action of the pressure air, falls to the lowest position 13 of the air inlet when falling on the end face of the volute 1, the end face of the volute 1 limits the position of the air inlet, and then does not descend any more, and at the moment, the gap 8 between the air inlet and the impeller is minimum.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (3)
1. The structure for preventing surging of the magnetic suspension air compressor is characterized by comprising a volute (1), an air inlet channel (2), an impeller (3), an end cover (4), a limiting block (5), a displacement sensor (6), a first air inlet (9) and a second air inlet (10) which are connected with an air outlet pipeline of the compressor; the device comprises a volute (1), a displacement sensor (6) and an end cover (4), wherein the inner diameter of the volute (1) is in sliding fit with the outer diameter of an air inlet channel (2), the volute (1) is provided with the first air inlet (9), the end cover (4) is provided with a limiting block (5), and the end cover (4) is provided with the second air inlet (10); the limiting block (5) is arranged at the contact surface of the air inlet channel (2) and the end cover (4) and can limit the ascending height of the air inlet channel (2);
when the first air inlet (9) is filled with pressure air, the air inlet channel (2) rises under the action of the pressure air and rises to the highest position (14) of the air inlet channel when contacting with the limiting block (5), and at the moment, the gap between the air inlet channel and the impeller (8) is the largest;
when the second air inlet (10) is filled with pressure air, the air inlet channel (2) descends under the action of the pressure air and descends to the lowest position (13) of the air inlet channel when falling on the end face of the volute (1), and at the moment, the gap (8) between the air inlet channel and the impeller is the smallest.
2. The structure for preventing surging of a magnetic suspension air compressor according to claim 1, wherein the volute (1) is fixed with the end cover (4) through screws, and the end cover (4) is fixed with the limiting block (5) through screws.
3. A structure for preventing surging of a magnetic levitation air compressor according to claim 1, wherein the contact surfaces between the volute (1) and the air inlet channel (2), the volute (1) and the end cover (4), and the air inlet channel (2) and the end cover (4) are sealed by sealing rings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278297.7A CN110762051B (en) | 2019-12-13 | 2019-12-13 | Surging prevention structure of magnetic suspension air compressor |
| PCT/CN2020/076881 WO2021114485A1 (en) | 2019-12-13 | 2020-02-27 | Anti-surge structure for maglev air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278297.7A CN110762051B (en) | 2019-12-13 | 2019-12-13 | Surging prevention structure of magnetic suspension air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110762051A CN110762051A (en) | 2020-02-07 |
| CN110762051B true CN110762051B (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911278297.7A Active CN110762051B (en) | 2019-12-13 | 2019-12-13 | Surging prevention structure of magnetic suspension air compressor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110762051B (en) |
| WO (1) | WO2021114485A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762051B (en) * | 2019-12-13 | 2024-03-15 | 南京磁谷科技有限公司 | Surging prevention structure of magnetic suspension air compressor |
| CN111963470A (en) * | 2020-08-07 | 2020-11-20 | 中国北方发动机研究所(天津) | Turbocharger compressor clearance control device |
| CN112780584A (en) * | 2021-02-22 | 2021-05-11 | 珠海格力电器股份有限公司 | Magnetic suspension compressor |
| CN117267151B (en) * | 2023-04-23 | 2024-04-02 | 江苏海拓宾未来工业科技集团有限公司 | Air suspension centrifugal blower and processing technology thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013194687A (en) * | 2012-03-22 | 2013-09-30 | Mitsubishi Heavy Ind Ltd | Multistage centrifugal compressor |
| CN105863826A (en) * | 2015-02-06 | 2016-08-17 | 霍尼韦尔国际公司 | Passive and semi-passive inlet-adjustment mechanisms for compressor, and turbocharger having same |
| CN108868910A (en) * | 2018-09-18 | 2018-11-23 | 凤城市东宁动力有限公司 | Turbocharger anti-surge air inlet water conservancy diversion cover structure |
| CN109236750A (en) * | 2018-08-06 | 2019-01-18 | 南京磁谷科技有限公司 | A kind of adjustment structure of air intake duct and impeller concentricity |
| CN211230997U (en) * | 2019-12-13 | 2020-08-11 | 南京磁谷科技有限公司 | Surging prevention structure of magnetic suspension air compressor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003300444A1 (en) * | 2003-12-24 | 2005-08-03 | Honeywell International, Inc. | Recirculation port |
| JP4798491B2 (en) * | 2006-03-24 | 2011-10-19 | トヨタ自動車株式会社 | Centrifugal compressor, engine intake control system using the same, and intake control method |
| CN102720692B (en) * | 2012-05-07 | 2015-04-15 | 康跃科技股份有限公司 | Double-driving parallel sequential supercharging compressor |
| JP5649758B2 (en) * | 2012-08-24 | 2015-01-07 | 三菱重工業株式会社 | Centrifugal compressor |
| US11131312B2 (en) * | 2017-12-05 | 2021-09-28 | Ford Global Technologies, Llc | Active casing treatment adapted with movable sleeve |
| CN110762051B (en) * | 2019-12-13 | 2024-03-15 | 南京磁谷科技有限公司 | Surging prevention structure of magnetic suspension air compressor |
-
2019
- 2019-12-13 CN CN201911278297.7A patent/CN110762051B/en active Active
-
2020
- 2020-02-27 WO PCT/CN2020/076881 patent/WO2021114485A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013194687A (en) * | 2012-03-22 | 2013-09-30 | Mitsubishi Heavy Ind Ltd | Multistage centrifugal compressor |
| CN105863826A (en) * | 2015-02-06 | 2016-08-17 | 霍尼韦尔国际公司 | Passive and semi-passive inlet-adjustment mechanisms for compressor, and turbocharger having same |
| CN109236750A (en) * | 2018-08-06 | 2019-01-18 | 南京磁谷科技有限公司 | A kind of adjustment structure of air intake duct and impeller concentricity |
| CN108868910A (en) * | 2018-09-18 | 2018-11-23 | 凤城市东宁动力有限公司 | Turbocharger anti-surge air inlet water conservancy diversion cover structure |
| CN211230997U (en) * | 2019-12-13 | 2020-08-11 | 南京磁谷科技有限公司 | Surging prevention structure of magnetic suspension air compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021114485A1 (en) | 2021-06-17 |
| CN110762051A (en) | 2020-02-07 |
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Address after: No. 99 Jinxin Middle Road, Jiangning Development Zone, Nanjing City, Jiangsu Province, 211102 Patentee after: Nanjing Cigu Technology Co.,Ltd. Country or region after: China Address before: No.100, Jiuzhu Road, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu, 211102 Patentee before: NANJING CIGU Ltd.,Corp. Country or region before: China |
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