CN105626581A - Stress application centrifugal pump with pressurization hole - Google Patents
Stress application centrifugal pump with pressurization hole Download PDFInfo
- Publication number
- CN105626581A CN105626581A CN201610096463.1A CN201610096463A CN105626581A CN 105626581 A CN105626581 A CN 105626581A CN 201610096463 A CN201610096463 A CN 201610096463A CN 105626581 A CN105626581 A CN 105626581A
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- CN
- China
- Prior art keywords
- centrifugal pump
- volute casing
- cut water
- anemostat
- flow separation
- Prior art date
- 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.)
- Pending
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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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a stress application centrifugal pump with a pressurization hole and belongs to the field of stress application fuel systems of aircraft engines. The stress application centrifugal pump comprises a vane wheel and a shell, wherein the shell comprises a vortex chamber and a diffusion tube; the vane wheel is mounted in the vortex chamber; the diffusion tube is communicated with the vortex chamber; a conical casing tube is arranged on the inner wall of the diffusion tube; a volute tongue is formed in a boundary between the vortex chamber and the conical casing tube; the shell also comprises a pressurization hole; the pressurization hole is a circular through hole from the diffusion tube to the downstream of the volute tongue. The stress application centrifugal pump with the pressurization hole can effectively solve the problem of cavitation erosion damage caused by cavitation of the stress application centrifugal pump.
Description
Technical field
The invention belongs to aeroengine thrust augmentation fuel system field, design particularly to a kind of afterburning centrifugal pump structure with pressurized hole, this structural design can effectively solve the cavitation impingement problem that afterburning centrifugal pump causes because of cavitation.
Background technology
Afterburning centrifugal pump is the vitals of aeroengine thrust augmentation fuel system, and its function is to provide the fuel oil with certain pressure and flow to afterburning fuel system. Existing afterburning centrifugal pump structure is as it is shown in figure 1, be generally made up of impeller 1 and housing 2. Housing 2 includes volute casing 3 and anemostat 4. Impeller 1 adopts radially straight impeller, and volute casing 3 adopts section configuration to be semicircular concentric spiral case, and impeller 1 is arranged in volute casing 3. Anemostat 4 is cone anemostat, and anemostat 4 connects with volute casing 3. Inwall at anemostat 4 is provided with taper 5. Intersection at volute casing 3 and taper 5 forms cut water 6, and the established angle of cut water 6 is 43 ��. Being provided with the pump intake 7 concentric with impeller in volute casing 3 center, the outlet of anemostat 4 is pump discharge 8, and it is impeller outlet 9 that the blade outer rim of impeller rotates the contour line formed. Housing 2, impeller outlet 9 and pump discharge 8 define chamber 10.
The work process of afterburning centrifugal pump is: fuel oil enters afterburning centrifugal pump from pump intake 7, and the high speed rotating through impeller 1 obtains kinetic energy and pressure energy, throws away entrance chamber 10 from impeller outlet 9, anemostat 4 derives entrance pipeline road. In use, near cut water 6 downstream, volute casing internal face occurs in that the cavitation impingement of pit, pit shape to afterburning centrifugal pump, and its destroyed area is cavitation impingement district 11. Cavitation impingement district 11 ranges for cut water established angle for starting point, rotates 9 �� of region walls to rotation 27 �� counterclockwise counterclockwise. Cavitation impingement is owing to cavitation causes that shell wall side metal material degrades. Cavitation refers to that fuel oil is in flow process, and when the low saturated vapor pressure to fuel oil of local differential static pressure, in fuel liquid, gas core burst grows up into cavity. When bubble collapse, produce shock wave and microjet acts on shell wall side, shell wall side is caused cavitation impingement.
Penetrance hole can be formed by shell wall side at place of cavitation impingement district 11 when cavitation corrosion is serious, cause fuel leakage, the operation safety of serious threat aero-engine. Therefore the cavitation impingement problem solving afterburning centrifugal pump is particularly important.
Summary of the invention
Present invention aim to address the cavitation impingement problem of afterburning centrifugal pump, a kind of afterburning centrifugal pump with pressurized hole is proposed, the generation of afterburning centrifugal pump cavitation can be suppressed, thus avoiding because cavitation causes the cavitation impingement of afterburning centrifugal pump, extend the service life of afterburning centrifugal pump, it is ensured that the operation safety of aero-engine.
A kind of afterburning centrifugal pump with pressurized hole that the present invention proposes. This reinforcing centrifugal pump is made up of impeller and housing, and housing includes volute casing and anemostat, and impeller is arranged in volute casing; Anemostat connects with volute casing; Inwall at anemostat is provided with taper; Cut water is formed at volute casing and taper intersection; It is characterized in that, housing also includes pressurized hole. Pressurized hole is to have a through hole running through cut water in housing.
The feature of the present invention and beneficial effect:
A kind of afterburning centrifugal pump with pressurized hole of the present invention is the cavitation impingement problem existed for afterburning centrifugal pump, adopt in housing, have a pressurized hole running through cut water, a small gangs of high pressure fuel is introduced in anemostat, spray from the vortex core region near the mid-point on central axis volute casing internal face of cut water downstream flow separation zone, the static pressure of flow separation zone can be improved, the flow separation turbo-charger set of flow separation zone is become little whirlpool, and little whirlpool is pushed away shell wall side, afterburning centrifugal pump can be flowed out in little whirlpool with high-speed fuel oil, thus effectively suppressing the generation of cut water downstream flow separation zone cavitation. Thus avoiding because cavitation causes the cavitation impingement of afterburning centrifugal pump, and extend the service life of afterburning centrifugal pump, it is ensured that the operation safety of aero-engine.
Accompanying drawing explanation
Fig. 1 is former afterburning centrifugal pump structure schematic diagram.
Fig. 2 is a kind of afterburning centrifugal pump structure schematic diagram with pressurized hole of the present invention.
Fig. 3 is former afterburning centrifugal pump chamber fuel oil fluidised form schematic diagram.
Fig. 4 is a kind of afterburning centrifugal pump chamber fuel oil fluidised form schematic diagram with pressurized hole of the present invention
In figure: 1. impeller; 2. housing; 3. volute casing; 4. anemostat; 5. taper; 6. cut water; 7. pump intake; 8. pump discharge; 9. impeller outlet; 10. chamber; 11. cavitation impingement district; 12. pressurized hole; 13. flow separation zone.
Detailed description of the invention
The present invention proposes a kind of afterburning centrifugal pump structure with pressurized hole, as shown in Figure 2. This reinforcing centrifugal pump is the improvement to existing afterburning centrifugal pump, same with existing afterburning centrifugal pump, is made up of impeller 1 and housing 2, and housing 2 includes volute casing 3 and anemostat 4. Impeller 1 adopts radially straight impeller, and volute casing 3 adopts section configuration to be semicircular concentric spiral case, and impeller 1 is arranged in volute casing 3. Anemostat 4 is cone anemostat, and anemostat 4 connects with volute casing 3. Inwall at anemostat 4 is provided with taper 5. Intersection at volute casing 3 and taper 5 forms cut water 6, and the established angle of cut water 6 is 43 ��. Being provided with the pump intake 7 concentric with impeller in volute casing 3 center, the outlet of anemostat 4 is pump discharge 8, and it is impeller outlet 9 that the blade outer rim of impeller rotates the contour line formed. Housing 2, impeller outlet 9 and pump discharge 8 define chamber 10.
Improvements of the present invention are: have a pressurized hole 12 running through cut water 6 in housing. By pressurized hole 12, volute casing 3 is made to be connected with anemostat 4 and taper 5.
The aperture of the pressurized hole 12 of the present embodiment is 2mm, and its axis is positioned on the middle section of housing 2, is 55 �� with the angle of horizontal symmetry-line. Pressurized hole 12 arrival end is positioned at the internal face of taper 5, and the port of export is positioned at cut water 6 downstream volute casing internal face. Because the fuel oil static pressure of pressurized hole 12 arrival end is higher than the fuel oil static pressure of the port of export, therefore, the fuel flow direction in pressurized hole 12 is for flow to cut water 6 downstream volute casing from taper 5.
The principle of this structure is: fuel oil fluidised form in original afterburning centrifugal pump chamber 10, as shown in Figure 3. Because the flow-control of afterburning centrifugal pump is to take outlet throttling, enters the fuel oil of anemostat 4, enter pipeline road in part through pump discharge 8. Another part fuel oil is subject to the stop of outlet throttling valve, walks around again cut water 6 and flows back into volute casing 3. When pump discharge 8 flow is less, reflux even more serious. Backflow, when walking around cut water 6, is subject to the impact of cut water 6, can in formation flow separation zone, cut water 6 downstream 13. Flow separation zone 13 is to be made up of a series of flow separation whirlpool, and the vortex core center in flow separation whirlpool and the angle of horizontal reference line are about 55 ��. Because the vortex core center in flow separation whirlpool is low-pressure area, and pressure is lower than the saturated vapor pressure of fuel oil, causes that afterburning centrifugal pump there occurs cavitation. The formation in flow separation whirlpool is the basic reason of afterburning centrifugal pump generation cavitation.
The present invention with fuel oil fluidised form in the afterburning centrifugal pump chamber 10 of pressurized hole, as shown in Figure 4. By pressurized hole 12, in anemostat 4, (higher-pressure region) introduces a small gangs of high pressure fuel, spray from vortex core center (low-pressure area) the volute casing internal face of cut water 6 downstream flow separation zone 13, the static pressure of flow separation zone 13 can be improved, the flow separation turbo-charger set of flow separation zone 13 is become little whirlpool, and little whirlpool is pushed away shell wall side, afterburning centrifugal pump can be flowed out in little whirlpool with high-speed fuel oil, thus effectively inhibiting the generation of cut water 6 downstream flow separation zone 13 place cavitation.
Employing pressurized hole designs, and simple in construction utilizes the high pressure fuel of self, do not need to be introduced from outside into high-pressure fluid, can effectively solve afterburning centrifugal pump cavitation and the cavitation impingement problem that causes.
Claims (2)
1. the afterburning centrifugal pump with pressurized hole, this reinforcing centrifugal pump is made up of impeller and housing, and housing includes volute casing and anemostat, and impeller is arranged in volute casing; Anemostat connects with volute casing; Inwall at anemostat is provided with taper; Cut water is formed at volute casing and taper intersection; It is characterized in that, housing also includes pressurized hole, and pressurized hole is to have a through hole running through cut water in housing.
2. pressurized hole as claimed in claim 1, it is characterised in that: this pressurized hole is from anemostat to the manhole in cut water downstream; Pressurized hole arrival end is positioned at the internal face of taper, and the port of export is positioned at the vortex core region near the mid-point on central axis volute casing internal face of cut water downstream flow separation zone; In anemostat, a small gangs of high pressure fuel is introduced by pressurized hole, spray from the vortex core region near the mid-point on central axis volute casing internal face of cut water downstream flow separation zone, improve the static pressure of cut water downstream flow separation zone, the flow separation turbo-charger set of flow separation zone is become little whirlpool, and little whirlpool is pushed away volute casing wall, little whirlpool can flow away with liquid stream, thus effectively inhibiting the generation of cut water downstream flow separation zone cavitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096463.1A CN105626581A (en) | 2016-02-22 | 2016-02-22 | Stress application centrifugal pump with pressurization hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096463.1A CN105626581A (en) | 2016-02-22 | 2016-02-22 | Stress application centrifugal pump with pressurization hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105626581A true CN105626581A (en) | 2016-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610096463.1A Pending CN105626581A (en) | 2016-02-22 | 2016-02-22 | Stress application centrifugal pump with pressurization hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105626581A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN108457905A (en) * | 2018-05-07 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN115247647A (en) * | 2020-09-30 | 2022-10-28 | 兰州理工大学 | Volute pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5286162A (en) * | 1993-01-04 | 1994-02-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of reducing hydraulic instability |
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| CN101504014A (en) * | 2009-03-13 | 2009-08-12 | 朴英 | Novel high-speed fuel oil centrifugal pump |
| CN205478553U (en) * | 2016-02-22 | 2016-08-17 | 清华大学 | Take supercharging hole's afterburning centrifugal pump |
-
2016
- 2016-02-22 CN CN201610096463.1A patent/CN105626581A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5286162A (en) * | 1993-01-04 | 1994-02-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of reducing hydraulic instability |
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| CN101504014A (en) * | 2009-03-13 | 2009-08-12 | 朴英 | Novel high-speed fuel oil centrifugal pump |
| CN205478553U (en) * | 2016-02-22 | 2016-08-17 | 清华大学 | Take supercharging hole's afterburning centrifugal pump |
Non-Patent Citations (1)
| Title |
|---|
| 薛梅新: "加力燃油泵隔舌倒圆抑制分离的数值模拟", 《航空动力学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457905A (en) * | 2018-05-07 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN108457905B (en) * | 2018-05-07 | 2023-11-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN108457906B (en) * | 2018-05-31 | 2023-11-24 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN115247647A (en) * | 2020-09-30 | 2022-10-28 | 兰州理工大学 | Volute pump |
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Application publication date: 20160601 |
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