CN109356866B - Flexible casing treatment centrifugal compressor - Google Patents
Flexible casing treatment centrifugal compressor Download PDFInfo
- Publication number
- CN109356866B CN109356866B CN201811580833.4A CN201811580833A CN109356866B CN 109356866 B CN109356866 B CN 109356866B CN 201811580833 A CN201811580833 A CN 201811580833A CN 109356866 B CN109356866 B CN 109356866B
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- China
- Prior art keywords
- baffle
- flexible
- mounting groove
- volute
- impeller
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- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 5
- 108091006146 Channels Proteins 0.000 claims 8
- 230000008676 import Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 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
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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
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a flexible casing treatment centrifugal compressor which comprises a volute and an impeller, wherein air outlet channels are formed in two side ends in the volute, an air inlet is formed in the air inlet channel on the front side surface of the volute, air outlets are formed in the air outlet channels on the two side ends in the volute, an impeller installation cavity is communicated with the air inlet channel and the air outlet channels respectively, organic casing grooves are formed in two side walls of the air inlet channel, partition plates are transversely and fixedly installed in the casing grooves, flexible baffle plates are arranged on the side surfaces of the partition plates, and gaps are formed between the outer side ends of the flexible baffle plates and the bottom surface of a casing groove. The method is carried out on the basis of not changing the original volute casing processing mechanism of the centrifugal compressor, is simple and convenient, further widens the stable working range of the centrifugal compressor, avoids the flow loss to a certain extent, and effectively prevents the efficiency of the centrifugal compressor from being reduced.
Description
Technical Field
The invention relates to the technical field of centrifuge industry, in particular to a flexible casing processing centrifugal compressor.
Background
Wheel compressors include both axial and centrifugal basic types. The axial-flow compressor has low single-stage sub-ratio and strong circulation capacity, and is suitable for large-scale multi-stage compression systems. Compared with an axial-flow compressor, the centrifugal compressor has the characteristics of high single-stage pressure ratio, simple structure, small volume, light weight and the like, and can keep higher efficiency in a wider operation range, so that the centrifugal compressor is widely applied to the fields of vehicles, ships, partial industries, aviation and the like.
The centrifugal compressor is one of the key components of the turbocharger of the internal combustion engine. In recent years, the technical requirements of energy conservation and CO2 emission reduction of the internal combustion engine, high power density of the internal combustion engine, plateau power recovery and the like are higher and higher, and the compression ratio of the supercharger of the internal combustion engine is promoted to be continuously improved. The centrifugal compressor is used as an impeller type machine, the stable working range of the centrifugal compressor is rapidly reduced along with the improvement of the pressure ratio, the use requirement of an internal combustion engine for a vehicle is difficult to meet, and the research on the pneumatic stability and the stability expansion of the centrifugal compressor is the core and the difficulty of the research in the field.
The centrifugal compressor casing processing technology is an axial groove at the position of an air guide wheel casing, can greatly widen the stable working range, and has low cost. Under the blockage condition, the axial grooves enable the fluid to bypass through the axial grooves, so that the blockage flow is increased; in near-surge conditions, stall fluid is allowed to exit through the channel and re-enter the impeller, thereby delaying the onset of surge. However, the conventional casing groove is of a rigid structure, and the width of the groove is not changed along with the working condition change of the centrifugal compressor, so that the stability expanding capability of the casing groove is limited, and the maximum efficiency of the compressor is influenced.
Disclosure of Invention
The invention aims to provide a flexible casing processing centrifugal compressor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a flexible centrifugal compressor for casing treatment comprises a volute and an impeller, wherein a rotating shaft is fixedly inserted in the middle of the impeller, a plurality of groups of blades are fixedly installed on the surface of the impeller, which is positioned in the volute, the middle of the interior of the volute is transversely provided with an air inlet channel, the interior of the volute is provided with an impeller installation cavity at the impeller, air outlet channels are respectively arranged at two side ends of the interior of the volute, the impeller is installed in the impeller installation cavity, the front side surface of the volute is provided with an air inlet at the air inlet channel, the two side ends of the interior of the volute are respectively provided with an air outlet at the air outlet channels, the impeller installation cavity is respectively communicated with the air inlet channels and the air outlet channels, two side walls of the air inlet channels are respectively provided with a casing groove, one side of the casing groove, which is close to the, a flexible baffle is arranged on the side surface of the partition plate, and a gap is formed between the outer side end of the flexible baffle and the bottom surface of the casing groove.
Furthermore, the partition plate is fixedly installed in the middle of the machine box groove.
Further, a side end surface of the flexible baffle close to the baffle is fixedly clamped with a clamping plate, the baffle is provided with a mounting groove by a side surface of the impeller mounting cavity, the flexible baffle is inserted into the mounting groove through the clamping plate, a screw is arranged on the outer surface of the baffle at the mounting groove, the flexible baffle and the clamping plate are fixedly mounted in the mounting groove through the screw, and the nut end of the screw is fixedly welded on the outer surface of the baffle.
Further, a side end surface of the flexible baffle close to the baffle is fixedly clamped with a clamping plate, the baffle is provided with a mounting groove close to a side surface of the air inlet, the flexible baffle is inserted into the mounting groove through the clamping plate, a screw is arranged on the outer surface of the baffle in the mounting groove, the flexible baffle and the clamping plate are fixedly mounted in the mounting groove through the screw, and the nut end of the screw is fixedly welded on the outer surface of the baffle.
Further, a side end surface of the flexible baffle close to the baffle is fixedly clamped with a clamp plate, a mounting groove is formed in the middle of the bottom surface of the case corresponding to the side surface of the middle of the bottom surface of the case, the flexible baffle is inserted into the mounting groove through the clamp plate, a screw is arranged on the outer surface of the baffle in the mounting groove, the flexible baffle and the clamp plate are fixedly mounted in the mounting groove through the screw, and the nut end of the screw is fixedly welded on the outer surface of the baffle.
Compared with the prior art, the invention has the advantages that:
the flexible baffle is placed in the casing groove of the centrifugal compressor for the flexible casing treatment, the flexible baffle is carried out on the basis of not changing the original volute casing treatment mechanism of the centrifugal compressor, the flexible casing treatment method is simple and convenient, the stable working range of the centrifugal compressor is further widened, the flow loss is avoided to a certain extent, and the reduction of the efficiency of the centrifugal compressor is effectively prevented.
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 sectional view of a flexible casing treatment centrifugal compressor in embodiment 1 of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
fig. 3 is a sectional view of a flexible casing processing centrifugal compressor in embodiment 2 of the present invention;
fig. 4 is a sectional view of a flexible casing handling centrifugal compressor according to embodiment 3 of the present invention.
In the figure: 1 volute, 11 air inlet channel, 111 air inlet, 12 impeller mounting cavity, 13 air outlet channel, 14 air outlet, 2 impeller, 21 blades, 3 rotating shaft, 4 flexible baffle plates, 41 clamping plates, 5 casing grooves, 51 groove inlet, 52 groove outlet, 6 partition plates and 61 mounting grooves.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Example one
Referring to fig. 1 and 2, the present invention provides a flexible casing processing centrifugal compressor, including a volute 1 and an impeller 2, and characterized in that: a rotating shaft 3 is fixedly inserted in the middle of an impeller 2, a plurality of groups of blades 21 are fixedly installed on the surface of the impeller 2 in a volute 1, an air inlet channel 11 is transversely arranged in the middle of the interior of the volute 1, an impeller installation cavity 12 is arranged in the volute 1 at the impeller 2, air outlet channels 13 are arranged at both side ends of the interior of the volute 1, the impeller 2 is installed in the impeller installation cavity 12, an air inlet 111 is arranged on the air inlet channel 11 on the front side surface of the volute 1, air outlets 14 are arranged at both side ends of the interior of the volute 1 at the air outlet channels 13, the impeller installation cavity 12 is respectively communicated with the air inlet channel 11 and the air outlet channels 13, organic box grooves 5 are arranged on both side walls of the air inlet channel 11, a channel inlet 51 is arranged at the opening of the box groove 5 close to the impeller installation cavity, a channel outlet 52 is arranged at the opening of the box groove 5 close to the, 6 side surfaces of baffle are provided with flexible baffle 4, be formed with the gap between 4 outside ends of flexible baffle and the 5 basal surfaces of quick-witted casket groove, flexible baffle 4 is close to a side end surface of baffle 6 and all fixes the block and has splint 41, baffle 6 has seted up mounting groove 61 by advancing 12 side surfaces of impeller installation cavity, flexible baffle 4 inserts through splint 41 and locates in mounting groove 61, 6 surfaces of baffle are provided with the screw in mounting groove 61 department, baffle 6 is through the screw with flexible baffle 4 and splint 41 fixed mounting in mounting groove 61, the fixed welding of the nut end of screw is at 6 surfaces of baffle.
Example two
Referring to fig. 3, the difference between the present embodiment and the first embodiment is: the equal fixed block in a side end surface that flexible baffle 4 is close to baffle 6 has splint 41, and mounting groove 61 has been seted up to baffle 6 by air inlet 111 side surface, and flexible baffle 4 inserts through splint 41 and locates in mounting groove 61, and 6 surfaces of baffle are provided with the screw in mounting groove 61 department, and baffle 6 is through the screw with flexible baffle 4 and splint 41 fixed mounting in mounting groove 61, and the nut end fixed welding of screw is at 6 surfaces of baffle.
EXAMPLE III
Referring to fig. 3, the difference between the present embodiment and the first embodiment is: the flexible baffle 4 is close to a side end surface of baffle 6 and all fixes the block and has had splint 41, and baffle 6 has seted up mounting groove 61 corresponding to a side surface of 5 basal surfaces middle parts of machine casket groove, and flexible baffle 4 inserts through splint 41 and locates in mounting groove 61, and 6 surfaces of baffle are provided with the screw in mounting groove 61 department, and baffle 6 is through the screw with flexible baffle 4 and splint 41 fixed mounting in mounting groove 61, and the nut end fixed welding of screw is at 6 surfaces of baffle.
The working principle is as follows: under normal conditions, the difference between the pressure near the channel of the impeller 2 and the ambient pressure is not large, the bending degree of the flexible baffle 4 is small, gas is not easy to flow out of the casing groove 5, the flow loss is reduced, and the efficiency of the gas compressor can be improved to a certain degree. When the compressor is in a near-surge working condition, the pressure of the channel inlet 51 is greater than the pressure of the ambient atmosphere, the pressure of the channel outlet 52 is lower than the pressure of the ambient atmosphere, the flexible baffle 4 can be bent under the action of the pressure difference, the bending degree is increased along with the increase of the pressure difference, the flow area of the gas is also increased continuously, and the stall fluid can return to the air inlet channel 11 from the casing groove 5. Under the working condition of near blockage, the pressure of the channel inlet 51 is lower than the ambient pressure, the flexible baffle 4 can be bent under the action of the pressure difference, and the extra flow enters the air inlet channel 11 through the casing groove 5 to increase the blockage flow of the compressor.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.
Claims (5)
1. The utility model provides a flexible quick-witted casket processing centrifugal compressor, includes spiral case (1) and impeller (2), its characterized in that: a rotating shaft (3) is fixedly inserted in the middle of the impeller (2), a plurality of groups of blades (21) are fixedly installed on the surface of the impeller (2) in the volute (1), an air inlet channel (11) is transversely formed in the middle of the interior of the volute (1), an impeller installation cavity (12) is formed in the volute (1) at the impeller (2), air outlet channels (13) are formed in two side ends of the interior of the volute (1), the impeller (2) is installed in the impeller installation cavity (12), an air inlet (111) is formed in the air inlet channel (11) on the front side surface of the volute (1), air outlets (14) are formed in the air outlet channel (13) at two side ends of the interior of the volute (1), the impeller installation cavity (12) is respectively communicated with the air inlet channel (11) and the air outlet channel (13), and organic box grooves (5) are formed in two side walls of, machine casket groove (5) are close to impeller installation cavity one side opening and are channel import (51), and machine casket groove (5) are close to air inlet (111) one side opening and are channel export (52), and equal horizontal fixed mounting has baffle (6) in machine casket groove (5), baffle (6) side surface is provided with flexible baffle (4), be formed with the gap between flexible baffle (4) outside end and machine casket groove (5) basal surface.
2. The flexible casing handling centrifugal compressor of claim 1, wherein: the partition plate (6) is fixedly arranged in the middle of the machine box groove (5).
3. The flexible casing handling centrifugal compressor of claim 1, wherein: a side end surface that flexible baffle (4) are close to baffle (6) all fixes the block and has splint (41), baffle (6) are by advancing impeller installation cavity (12) side surface and have seted up mounting groove (61), flexible baffle (4) are inserted through splint (41) and are located in mounting groove (61), baffle (6) surface is provided with the screw in mounting groove (61) department, baffle (6) are through screw with flexible baffle (4) and splint (41) fixed mounting in mounting groove (61), the nut end fixed welding of screw is at baffle (6) surface.
4. The flexible casing handling centrifugal compressor of claim 1, wherein: a side end surface of the flexible baffle (4) close to the partition board (6) is fixedly clamped with a clamping plate (41), the partition board (6) is provided with a mounting groove (61) by a side surface of the air inlet (111), the flexible baffle (4) is inserted into the mounting groove (61) through the clamping plate (41), the outer surface of the partition board (6) is provided with a screw in the mounting groove (61), the partition board (6) is fixedly mounted in the mounting groove (61) through the screw with the flexible baffle (4) and the clamping plate (41), and the end of the screw cap of the screw is fixedly welded on the outer surface of the partition board (6).
5. The flexible casing handling centrifugal compressor of claim 1, wherein: a side end surface that flexible baffle (4) are close to baffle (6) all fixes the block and has splint (41), baffle (6) have seted up mounting groove (61) corresponding to crankcase groove (5) basal surface middle part position side surface, flexible baffle (4) are inserted through splint (41) and are located in mounting groove (61), baffle (6) surface is provided with the screw in mounting groove (61) department, baffle (6) are through screw with flexible baffle (4) and splint (41) fixed mounting in mounting groove (61), the nut end fixed welding of screw is at baffle (6) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580833.4A CN109356866B (en) | 2018-12-24 | 2018-12-24 | Flexible casing treatment centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580833.4A CN109356866B (en) | 2018-12-24 | 2018-12-24 | Flexible casing treatment centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109356866A CN109356866A (en) | 2019-02-19 |
| CN109356866B true CN109356866B (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811580833.4A Expired - Fee Related CN109356866B (en) | 2018-12-24 | 2018-12-24 | Flexible casing treatment centrifugal compressor |
Country Status (1)
| Country | Link |
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| CN (1) | CN109356866B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7220097B2 (en) * | 2019-02-27 | 2023-02-09 | 三菱重工業株式会社 | Centrifugal compressor and turbocharger |
| CN110118200A (en) * | 2019-06-14 | 2019-08-13 | 东风汽车集团有限公司 | Compressor housings and compressor |
| CN117759569B (en) * | 2023-12-29 | 2024-10-01 | 哈尔滨工程大学 | Intake bypass recirculation structure capable of silencing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106293A (en) * | 2001-09-28 | 2003-04-09 | Mitsubishi Heavy Ind Ltd | Fluid machinery |
| CN204200674U (en) * | 2014-06-27 | 2015-03-11 | 哈尔滨工程大学 | The centrifugal-flow compressor casing bleed recirculation structure of variable geometry |
| CN105570157B (en) * | 2015-12-28 | 2017-12-19 | 潍柴动力股份有限公司 | A kind of supercharger systems and low noise control method |
| US20170260987A1 (en) * | 2016-03-11 | 2017-09-14 | Daikin Applied Americas Inc. | Centrifugal compressor with casing treatment bypass |
| CN107035721B (en) * | 2017-03-14 | 2019-02-05 | 合肥工业大学 | Centrifugal compressor treatment case with adjustable slot width |
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2018
- 2018-12-24 CN CN201811580833.4A patent/CN109356866B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN109356866A (en) | 2019-02-19 |
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