CN107956748B - Adjustable guide combined blade and centrifugal compressor - Google Patents
Adjustable guide combined blade and centrifugal compressor Download PDFInfo
- Publication number
- CN107956748B CN107956748B CN201711268160.4A CN201711268160A CN107956748B CN 107956748 B CN107956748 B CN 107956748B CN 201711268160 A CN201711268160 A CN 201711268160A CN 107956748 B CN107956748 B CN 107956748B
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- Prior art keywords
- guide vane
- guide
- combined
- adjustable
- blade
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- 238000009434 installation Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/50—Fluid-guiding means, e.g. diffusers adjustable for reversing fluid flow
- F04D29/503—Fluid-guiding means, e.g. diffusers adjustable for reversing fluid flow especially adapted for elastic fluid 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
- F04D29/66—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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an adjustable guide combined blade and a centrifugal compressor, which are characterized by comprising a front guide blade, a rear guide blade and an adjustable guide combined blade formed by splicing the front guide blade and the rear guide blade; the front guide vane and the rear guide vane are respectively provided with a driving device and a rotating shaft; the driving device is used for controlling the corresponding guide vane to rotate along the rotating shaft; the adjustable guide combined blades are uniformly distributed at the outlet of the centrifugal compressor to form a ring shape. The adjustable outlet guide combined blade provided by the invention has larger adjustment angle, and can meet the requirement of large adjustment angle during forward and reverse flow of the compressor; compared with the compressor on the traditional combined power device, the centrifugal compressor with the adjustable guide combined blades at the outlet reduces the air flow attack angle of the reverse air flow entering the working wheel of the compressor when the compressor rotates forward and reversely, reduces the flow separation, reduces the work consumed by the compressor, and improves the flow stability and the working reliability of the IPU.
Description
Technical Field
The invention relates to an adjustable guide combined blade and a centrifugal compressor.
Background
The advanced combined power unit (IPU) integrates the traditional Auxiliary Power Unit (APU) and the Emergency Power Unit (EPU) to a high degree, and adopts the same combustion chamber and turbine components, so that the IPU is more compact in structure, smaller in size and lighter in weight, and is successfully applied to the latest generation fighter plane and becomes a development hot spot of aviation industry of various countries. The IPU has the characteristic of not depending on ground auxiliary equipment, starts the main engine before taking off, provides auxiliary power required by detection and maintenance of an airborne system, and can also provide backup emergency power in a short time when the main engine fails, so that the aircraft can safely land. Can be widely applied in the fields of military fighters, transport planes, helicopters, civil large airliners, private public service machines and the like.
The advanced combined power unit (IPU) is an Auxiliary Power Unit (APU) and Emergency Power Unit (EPU) fusion body, and adopts two working modes, and combines the functions of the two working modes. In the APU working mode, the IPU working process is basically the same as that of the gas turbine engine, air enters the combustion chamber after being compressed by the air compressor, fuel oil is injected into the combustion chamber to be combusted to form high-temperature and high-pressure fuel gas to push the turbine to rotate, and the turbine drives the air compressor to rotate and outputs shaft work to the accessory gearbox, the motor and/or the load air compressor. In EPU mode, the high-pressure air storage tank carried by the aircraft supplies high-pressure air source to the combustion chamber, most of high-pressure air flow and fuel are combusted to form high-pressure high-temperature gas to drive the turbine, and the rest high-pressure air flow can reversely flow through the compressor (forward-rotation countercurrent) driven by the turbine and rotating at the rated rotation speed, so that the air blowing idle running and the instability of the compressor are prevented when the IPU air inlet valve is closed (outflow is not allowed to enter the IPU device).
Even if the inlet and outlet positions of the air compressor are carefully designed with throttling devices such as inlet opening and closing guide vanes, outlet throttling baffles and the like, the air flow angle flowing into the working wheel of the air compressor from the outlet guide vanes of the air compressor in the reverse direction and the geometric angle of the blades deviate seriously, so that the air flow can cause various influences on the aspects of vibration, power consumption, stable working conditions and the like of the air compressor, and the air flow is a technical difficulty of scientific researchers.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide an adjustable guide combined blade and a centrifugal compressor, when the compressor rotates forwards and reversely in an EPU mode, the attack angle of the air flow entering a working wheel of the compressor from the reverse air flow is reduced, the flow separation is reduced, the reverse air flow is expected to generate pushing torque for the movable blade of the compressor, and the power consumption and vibration are reduced when the compressor rotates forwards and reversely.
In order to achieve the above object, the present invention adopts the following technical scheme:
An adjustable guide combined blade is characterized by comprising a front guide blade and a rear guide blade; the front guide vane and the rear guide vane can be spliced into a guide combined vane; the guide combined blade is in a complete blade shape, and a gap for the free rotation of the blade is reserved at the splicing position; the front guide vane and the rear guide vane are respectively provided with a driving device and a rotating shaft; the driving device is used for controlling the corresponding guide vane to rotate along the rotating shaft.
The adjustable guide combined blade is characterized in that the installation angle of the guide combined blade which is formed by splicing the front guide blade and the rear guide blade and is arranged at the outlet is adjustable.
The adjustable guide combined blade is characterized in that the length of the front guide blade in the flow direction is one fourth of that of the whole guide combined blade, and the length of the rear guide blade in the flow direction is three fourths of that of the whole guide combined blade.
The adjustable guide combined blade is characterized in that the rotating shaft is positioned in the middle of the front guide blade and the rear guide blade; the rotating shaft is positioned so that the front guide vane and the rear guide vane do not mechanically interfere with other components when rotating.
The centrifugal compressor with the adjustable guide combined blades is characterized in that the adjustable guide combined blades are uniformly distributed at the outlet of the centrifugal compressor to form a ring shape; after the front guide vane and the rear guide vane of each adjustable guide vane assembly rotate along respective rotation shafts, the rear guide vane of each adjustable guide vane assembly can be spliced with the front guide vane of another adjustable guide vane assembly adjacent to or separated from each other by one or two to form a circle of new adjustable guide vane assembly with different installation angles.
The centrifugal compressor with the adjustable guide combined blades is characterized in that the installation angle adjustment range of the outlet guide vanes is 120 degrees before and after the rotation splicing of the adjustable guide combined blades.
The centrifugal compressor with the adjustable guide combined blades is characterized by being applied to a combined power device with high fusion or a device with a forward rotation and countercurrent flow state of the centrifugal compressor.
The invention has the beneficial effects that: compared with the traditional centrifugal compressor with the adjustable guide combined blades, the adjustable guide combined blades for the air conditioner provided by the invention have the advantages that the adjusting angle of the adjustable guide combined blades for the air conditioner is larger, the installation adjusting angle of the guide vanes for the air conditioner can reach 120 degrees, and the requirement of large adjusting angle during forward rotation and reverse flow of the air conditioner can be met; compared with the traditional air compressor on the IPU, the centrifugal air compressor with the adjustable guide combined blades at the outlet reduces the air flow attack angle of reverse air flow entering the working wheel of the air compressor when the air compressor rotates forward and reversely, reduces flow separation, reduces the work consumed by the air compressor, and improves the flow stability and the working reliability of the IPU.
Drawings
FIG. 1 is a schematic view of a guide vane splice;
FIG. 2 is a schematic illustration of a guide vane adjustment principle;
FIG. 3 is a three-dimensional schematic view of a centrifugal compressor guide vane during normal intake;
fig. 4 is a three-dimensional schematic diagram of a centrifugal compressor guide vane in forward and reverse flow.
Meaning of reference numerals in the drawings:
1-rear guide vane, 2-front guide vane, 3-compressor movable vane, 4-gap, 5, 6-rotation axis.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the prior art, the clearance between the movable blade and the guide blade of the compressor is very small, if the rotating shaft is placed at a position far away from the front edge of the blade, the guide blade and the movable blade collide with each other by greatly adjusting the angle of the blade, and if the rotating shaft is installed near the front edge of the blade, the bearing strength is insufficient.
Therefore, the adjustable outlet guide combined vane designed by the invention is introduced on the basis of the centrifugal compressor used by the traditional IPU. Compared with the centrifugal compressor of the traditional IPU, the air compressor non-adjustable guide vane is structurally changed into a combined adjustable vane, and the guide vane is spliced and combined into a whole by two sections.
As shown in fig. 1, the adjustable outlet guide combined blade consists of a rear guide blade 1 and a front guide blade 2, and is respectively driven by respective driving devices to rotate around a rotating shaft, so that the aim of adjusting the installation angle of the outlet guide blade is fulfilled. A certain gap is reserved at the joint, and the rotating shafts are respectively arranged on the two guide vanes, so that the force born by the bearing is greatly reduced, and the strength requirement can be met; meanwhile, the guide vanes are spliced and combined with adjacent blades after rotating, so that the rotating angle requirement is met.
In the forward and backward flow, the rear guide vane 1 and the front guide vane 2 are respectively rotated for a certain angle and then are respectively spliced and combined with other guide vanes. On the basis that the guide vanes and the moving blades and the guide vanes do not collide with each other, the adjusting angle of the guide vanes of the air compressor is greatly increased, and the angle change requirement of the guide vanes during forward rotation and reverse flow can be met.
As shown in fig. 3 and 4, the adjustment range of the installation angle of the outlet guide vane can reach 120 degrees before and after the adjustable guide vane combination blades are rotationally spliced.
When the compressor rotates forward and reversely, the deviation between the air flow angle of the reverse flow entering the working wheel of the compressor from the guide vane at the outlet of the compressor and the geometric angle of the blades is reduced by adjusting the installation angle of the guide vane at the outlet of the compressor, the reverse air flow of the compressor and the power consumption of the compressor are reduced, and the energy efficiency, the stability and the reliability of the IPU of the combined power device are improved.
In this embodiment, the number of the adjustable guide vanes is 24, and the initial positions of the rear guide vanes are respectively designated as 1', 2'. 24', and the positions after rotation are 1", 2'. 24". The initial positions of the leading guide vanes were designated as1, 2..24, and the positions after rotation were designated as1, 2..24. The 48 blades are respectively rotated clockwise, 2' and 1 are spliced, 3 ' and 2 are spliced, and the like after rotation, 1' and 24 are spliced, and the fact that collision between the blades cannot occur can be verified. The positions of the blades after rotation are shown in fig. 2, so that the large-angle adjustment of the guide vanes is realized, and the angle requirement of the guide vanes in the forward-rotation and reverse-flow mode of the compressor is met.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. An adjustable guide combined blade is characterized by comprising a front guide blade and a rear guide blade; the front guide vane and the rear guide vane are combined one by one to form an integral guide combined vane, the front guide vane of each combined guide vane and the rear guide vane of the adjacent combined guide vane are assembled and combined to form a new guide combined vane, and the power consumption and vibration are reduced during forward rotation and countercurrent of the compressor; the guide combined blade is in a complete blade shape, and a gap for the free rotation of the blade is reserved at the splicing position; the front guide vane and the rear guide vane are respectively provided with a driving device and a rotating shaft; the driving device is used for controlling the corresponding guide vane to rotate along the rotating shaft.
2. The adjustable guide combined vane as set forth in claim 1, wherein the guide combined vane at the outlet is assembled by the front guide vane and the rear guide vane with adjustable installation angle.
3. The adjustable guide vane assembly of claim 1 wherein the leading guide vane is one-fourth the length of the entire guide vane assembly in the flow direction and the trailing guide vane is three-fourths the length of the entire guide vane assembly in the flow direction.
4. The adjustable guide vane assembly of claim 1 wherein said axis of rotation is intermediate said leading guide vane and said trailing guide vane; the rotating shaft is positioned so that the front guide vane and the rear guide vane do not mechanically interfere with other components when rotating.
5. A centrifugal compressor having an adjustable guide vane assembly according to any one of claims 1 to 4, wherein the adjustable guide vane assembly is uniformly distributed at an outlet of the centrifugal compressor to form a ring shape; after the front guide vane and the rear guide vane of each adjustable guide vane assembly rotate along respective rotation shafts, the rear guide vane of each adjustable guide vane assembly can be spliced with the front guide vane of another adjustable guide vane assembly adjacent to or separated from each other by one or two to form a circle of new adjustable guide vane assembly with different installation angles.
6. The centrifugal compressor with adjustable guide vane assembly of claim 5, wherein the adjustable guide vane assembly has an outlet vane mounting angle adjustment of 120 ° before and after rotational splicing.
7. The centrifugal compressor with adjustable guide vane assembly of claim 6, wherein the centrifugal compressor is used in a highly integrated combined power plant or in a plant where there is a forward and reverse flow condition of the centrifugal compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711268160.4A CN107956748B (en) | 2017-12-05 | 2017-12-05 | Adjustable guide combined blade and centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711268160.4A CN107956748B (en) | 2017-12-05 | 2017-12-05 | Adjustable guide combined blade and centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107956748A CN107956748A (en) | 2018-04-24 |
| CN107956748B true CN107956748B (en) | 2024-04-30 |
Family
ID=61963232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711268160.4A Active CN107956748B (en) | 2017-12-05 | 2017-12-05 | Adjustable guide combined blade and centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107956748B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810351A (en) * | 2022-04-12 | 2022-07-29 | 西安热工研究院有限公司 | Gas turbine system coupled with energy storage system and adjustable in compression flow and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3356289A (en) * | 1964-05-14 | 1967-12-05 | Hispano Suiza Sa | Supersonic compressors of the centrifugal or axial flow and centrifugal types |
| DE2502986A1 (en) * | 1975-01-25 | 1976-07-29 | Gutehoffnungshuette Sterkrade | Adjustment system for blades of a turbine compressor - with separate adjustment for each row of blade wheels through a crown wheel and gear system |
| JP2007309299A (en) * | 2006-05-22 | 2007-11-29 | Toyota Motor Corp | Centrifugal compressor with variable diffuser |
| WO2016127241A1 (en) * | 2015-02-10 | 2016-08-18 | Kevin Allan Dooley Inc. | Two-way flow control device, associated systems and methods |
| CN106574632A (en) * | 2014-06-26 | 2017-04-19 | 通用电气公司 | Inlet guide vanes system |
| CN207609615U (en) * | 2017-12-05 | 2018-07-13 | 南京航空航天大学 | A kind of adjustable diversion unit blade and centrifugal compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050123397A1 (en) * | 2003-12-03 | 2005-06-09 | Mcardle Nathan J. | Compressor diffuser |
-
2017
- 2017-12-05 CN CN201711268160.4A patent/CN107956748B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3356289A (en) * | 1964-05-14 | 1967-12-05 | Hispano Suiza Sa | Supersonic compressors of the centrifugal or axial flow and centrifugal types |
| DE2502986A1 (en) * | 1975-01-25 | 1976-07-29 | Gutehoffnungshuette Sterkrade | Adjustment system for blades of a turbine compressor - with separate adjustment for each row of blade wheels through a crown wheel and gear system |
| JP2007309299A (en) * | 2006-05-22 | 2007-11-29 | Toyota Motor Corp | Centrifugal compressor with variable diffuser |
| CN106574632A (en) * | 2014-06-26 | 2017-04-19 | 通用电气公司 | Inlet guide vanes system |
| WO2016127241A1 (en) * | 2015-02-10 | 2016-08-18 | Kevin Allan Dooley Inc. | Two-way flow control device, associated systems and methods |
| CN207609615U (en) * | 2017-12-05 | 2018-07-13 | 南京航空航天大学 | A kind of adjustable diversion unit blade and centrifugal compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107956748A (en) | 2018-04-24 |
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