CN105545810A - Case of centrifugal compressor - Google Patents
Case of centrifugal compressor Download PDFInfo
- Publication number
- CN105545810A CN105545810A CN201510956682.8A CN201510956682A CN105545810A CN 105545810 A CN105545810 A CN 105545810A CN 201510956682 A CN201510956682 A CN 201510956682A CN 105545810 A CN105545810 A CN 105545810A
- Authority
- CN
- China
- Prior art keywords
- casing
- centrifugal compressor
- case
- impeller
- bulge loop
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- 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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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
- 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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a case of a centrifugal compressor. The case of the centrifugal compressor comprises a convex ring which is continually arranged on the part, close to the upstream position of the front edge of an impeller of the centrifugal compressor, of the inner surface of the case in the circumferential direction. According to the case of the centrifugal compressor, the convex ring of the case is continually arranged on the part, close to the upstream position of the front edge of the impeller, of the inner surface of the case in the circumferential direction so that the flowing strength of leakage flow of a blade tip area of the centrifugal impeller can be reduced and the stable working range of the centrifugal compressor can be widened. Besides, compared with processing structures of other centrifugal compressor cases, the structure of the case of the centrifugal compressor has the advantages that the flowing control mechanism is clear, the structural design is simple, the application range is wide, and the production and manufacturing cost is low.
Description
Technical field
The present invention relates to the turbomachine such as ventilator, gas compressor field, particularly relate to a kind of casing of centrifugal compressor.
Background technique
A lot of scholar thinks, the stall of centrifugal compressor and the flowing in blade tip region have huge relation.In order to expand the stable operation range of centrifugal compressor under low flow rate condition, had at present much about patent of invention and the pertinent literature of treated casing, but main method is all realized by the structure of channel-shaped treated casing or bleed self-loopa treated casing.
The key to the issue of channel-shaped treated casing is position and the degree of depth of selecting groove.The position of groove is relevant with blade profile to the specific design of centrifugal impeller with the selection of the degree of depth, and current system of selection is multivariant three-dimensional artificial and experiment, and time cost is high, and the design cycle is long.
Bleed self-circulation type treated casing structure, except the selection of bleed groove has except identical problem with channel-shaped treated casing, also add the manufacturing cost of casing.
Summary of the invention
In view of Problems existing in background technique, the object of the present invention is to provide a kind of casing of centrifugal compressor, it can weaken the flow strength of centrifugal impeller blade tip district leakage flow, expand centrifugal compressor stable operation range and structural design is simple, applied widely, manufacturing cost is low.
To achieve these goals, the invention provides a kind of casing of centrifugal compressor, it has: bulge loop, and the part of the leading edge upstream end of the impeller of the close centrifugal compressor of the internal surface of casing is circumferentially arranged continuously.
Beneficial effect of the present invention is as follows:
In the casing of centrifugal compressor according to the present invention, the bulge loop of casing is circumferentially arranged on the internal surface of the casing of the leading edge upstream end near impeller continuously, thus the flow strength of centrifugal impeller blade tip district leakage flow can be weakened, expand the stable operation range of centrifugal compressor.In addition, compared with other centrifugal compressor treated casing structures, the flowing control mechanism of the casing of the centrifugal compressor in the present invention is clear and definite, structural design is simple, applied widely and manufacturing cost is low.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of the meridian plane along impeller of an embodiment of casing according to centrifugal compressor of the present invention;
Fig. 2 is the sectional drawing of the meridian plane along impeller of another embodiment of casing according to centrifugal compressor of the present invention;
Fig. 3 is the sectional drawing of the meridian plane along impeller of the another embodiment of casing according to centrifugal compressor of the present invention;
Fig. 4 is the enlarged view of encircled portion in Fig. 3.
Wherein, description of reference numerals is as follows:
1 casing 1151 top
11 bulge loop 1152 roots
111 inclined-plane 12 internal surfaces
112 side 2 impellers
113 inner peripheral surface 21 leading edges
114 end side surface D tip clearances
115 steps
Embodiment
Describe the casing according to centrifugal compressor of the present invention with reference to the accompanying drawings in detail.
Referring to figs. 1 through Fig. 4, the casing 1 according to centrifugal compressor of the present invention has: bulge loop 11, and the part of leading edge 21 upstream end of the impeller 2 of the close centrifugal compressor (not shown) of the internal surface 12 of casing 1 is circumferentially arranged continuously.
In the casing of centrifugal compressor according to the present invention, the bulge loop 11 of casing 1 is circumferentially arranged on the internal surface 12 of the casing 1 of leading edge 21 upstream end near impeller 2 continuously, thus the flow strength of centrifugal impeller 2 blade tip district leakage flow can be weakened, expand the stable operation range of centrifugal compressor.In addition, compared with other centrifugal compressor treated casing structures, the flowing control mechanism of the casing 1 of the centrifugal compressor in the present invention is clear and definite, structural design is simple, applied widely and manufacturing cost is low.
In one embodiment, with reference to Fig. 1, bulge loop 11 has inclined-plane 111 and the side 112 vertical with the internal surface 12 of casing 1 and shape of cross section is wedge shape.What here remark additionally is that described cross section refers to and sections rear upper and lower two-part cross section separately as shown in Figure 1.
In one embodiment, the inclined-plane 111 of bulge loop 11 can be 15 ° ~ 45 ° with internal surface 12 angle of casing 1, wherein, and the inclined-plane 111 of bulge loop 11 and internal surface 12 angle preferably 30 ° of casing 1.
In one embodiment, with reference to Fig. 1, the blade tip radial clearance of leading edge 21 in casing 1 of impeller 2 is D, the radial dimension of the side 112 of bulge loop 11 (i.e. bulge loop 11 from the internal surface 12 of casing 1 radially to the height of inner process) can be 0.8D ~ 2D, this is the relation extents between the radial dimension of the side 112 of preferred bulge loop 11 and blade tip radial clearance D, but not only for so, suitably can adjust according to the specific design of casing 1.
In one embodiment, with reference to Fig. 2, bulge loop 11 has two end side surface 114 of the inner peripheral surface 113 of the internal surface 12 being parallel to casing 1 and the internal surface 12 perpendicular to casing 1, and shape of cross section is rectangle.What here remark additionally is that described cross section refers to and sections rear upper and lower two-part cross section separately as shown in Figure 2.
In one embodiment, with reference to Fig. 2, the blade tip radial clearance of leading edge 21 in casing 1 of impeller 2 is D, the axial dimension (i.e. the axial dimension of bulge loop 11) of inner peripheral surface 113 can be D ~ 2D, the radial dimension of end side surface 114 (i.e. bulge loop 11 from the internal surface 12 of casing 1 radially to the height of inner process) can be 0.8D ~ 2D, size relationship described here is the preferred scope of the present invention, but not only for so, can suitably adjust according to actual needs.
In one embodiment, with reference to Fig. 3, the shape of bulge loop 11 is the stairstepping with step 115.What here remark additionally is that described cross section refers to and sections rear upper and lower two-part cross section separately as shown in Figure 3.
In one embodiment, with reference to Fig. 3, the blade tip radial clearance of leading edge 21 in casing 1 of impeller 2 is D, and the radial height (namely bulge loop 11 radially forms the height of step 115 from the internal surface 12 of casing 1) of step 115 can be 0.8D ~ 2D.This is the relation extents between the radial height of preferred step 115 and blade tip radial clearance D, but not only for so, suitably can adjust according to the specific design of casing 1.
In one embodiment, with reference to Fig. 3, the step 115 of bulge loop 11 can be single order.
In one embodiment, with reference to Fig. 3, step 115 can have: top 1151; And root 1152, be positioned at the radial outside at top 1151.
Claims (10)
1. the casing of a centrifugal compressor, it is characterized in that, the casing (1) of centrifugal compressor has: bulge loop (11), and the part of leading edge (21) upstream end of the impeller (2) of the close centrifugal compressor of the internal surface (12) in casing (1) is circumferentially arranged continuously.
2. the casing of centrifugal compressor according to claim 1, it is characterized in that, bulge loop (11) has inclined-plane (111) and the side (112) vertical with the internal surface (12) of casing (1) and shape of cross section is wedge shape.
3. the casing of centrifugal compressor according to claim 2, is characterized in that, the inclined-plane (111) of bulge loop (11) and internal surface (12) angle of casing (1) are 15 ° ~ 45 °.
4. the casing of centrifugal compressor according to claim 2, is characterized in that,
The blade tip radial clearance of leading edge (21) in casing (1) of impeller (2) is D, and the radial dimension of the side (112) of bulge loop (11) is 0.8D ~ 2D.
5. the casing of centrifugal compressor according to claim 1, it is characterized in that, bulge loop (11) has two end side surface (114) of the inner peripheral surface (113) of the internal surface (12) being parallel to casing (1) and the internal surface (12) perpendicular to casing (1), and shape of cross section is rectangle.
6. the casing of centrifugal compressor according to claim 5, it is characterized in that, the blade tip radial clearance of leading edge (21) in casing (1) of impeller (2) is D, the axial dimension of inner peripheral surface (113) is D ~ 2D, and the radial dimension of end side surface (114) is 0.8D ~ 2D.
7. the casing of centrifugal compressor according to claim 1, is characterized in that, the shape of bulge loop (11) is for having the stairstepping of step (115).
8. the casing of centrifugal compressor according to claim 7, it is characterized in that, the blade tip radial clearance of leading edge (21) in casing (1) of impeller (2) is D, and the radial height of step (115) is 0.8D ~ 2D.
9. the casing of centrifugal compressor according to claim 7, is characterized in that, the step (115) of bulge loop (11) is single order.
10. the casing of centrifugal compressor according to claim 9, is characterized in that, step (115) has:
Top (1151); And
Root (1152), is positioned at the radial outside of top (1151).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510956682.8A CN105545810A (en) | 2015-12-18 | 2015-12-18 | Case of centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510956682.8A CN105545810A (en) | 2015-12-18 | 2015-12-18 | Case of centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105545810A true CN105545810A (en) | 2016-05-04 |
Family
ID=55825250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510956682.8A Pending CN105545810A (en) | 2015-12-18 | 2015-12-18 | Case of centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105545810A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379744A (en) * | 2018-12-25 | 2020-07-07 | 三菱重工业株式会社 | Centrifugal rotary machine |
| CZ309835B6 (en) * | 2022-06-10 | 2023-11-22 | České vysoké učení technické v Praze | An impeller blade located on the compressor wheel |
| CN117128187A (en) * | 2023-10-17 | 2023-11-28 | 上海交通大学 | End wall treatment method for stabilizing and enhancing expansion of centrifugal compressor by using closed impeller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012837A (en) * | 2007-02-02 | 2007-08-08 | 清华大学 | Centrifugal compressor having air removal jet box structure |
| US20070212217A1 (en) * | 2006-03-10 | 2007-09-13 | Rolls-Royce Plc | Compressor casing |
| CN101583800A (en) * | 2007-02-14 | 2009-11-18 | 博格华纳公司 | Compressor housing |
| JP2012177311A (en) * | 2011-02-25 | 2012-09-13 | Ihi Corp | Centrifugal compressor |
| CN104373388A (en) * | 2014-11-15 | 2015-02-25 | 中国科学院工程热物理研究所 | Treatment and flow control method for gas compressor casing with scattered seam type circumferential grooves |
-
2015
- 2015-12-18 CN CN201510956682.8A patent/CN105545810A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070212217A1 (en) * | 2006-03-10 | 2007-09-13 | Rolls-Royce Plc | Compressor casing |
| CN101012837A (en) * | 2007-02-02 | 2007-08-08 | 清华大学 | Centrifugal compressor having air removal jet box structure |
| CN101583800A (en) * | 2007-02-14 | 2009-11-18 | 博格华纳公司 | Compressor housing |
| JP2012177311A (en) * | 2011-02-25 | 2012-09-13 | Ihi Corp | Centrifugal compressor |
| CN104373388A (en) * | 2014-11-15 | 2015-02-25 | 中国科学院工程热物理研究所 | Treatment and flow control method for gas compressor casing with scattered seam type circumferential grooves |
Non-Patent Citations (1)
| Title |
|---|
| 杜朝辉,等: "采用前置凸台结构改善压气机性能", 《航空动力学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379744A (en) * | 2018-12-25 | 2020-07-07 | 三菱重工业株式会社 | Centrifugal rotary machine |
| CN111379744B (en) * | 2018-12-25 | 2022-03-29 | 三菱重工业株式会社 | Centrifugal rotary machine |
| CZ309835B6 (en) * | 2022-06-10 | 2023-11-22 | České vysoké učení technické v Praze | An impeller blade located on the compressor wheel |
| CN117128187A (en) * | 2023-10-17 | 2023-11-28 | 上海交通大学 | End wall treatment method for stabilizing and enhancing expansion of centrifugal compressor by using closed impeller |
| CN117128187B (en) * | 2023-10-17 | 2024-05-24 | 上海交通大学 | End wall treatment method for stabilizing and enhancing expansion of centrifugal compressor by using closed impeller |
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