CN112963379A - Composite structure of inducer and centrifugal impeller - Google Patents
Composite structure of inducer and centrifugal impeller Download PDFInfo
- Publication number
- CN112963379A CN112963379A CN202011444425.3A CN202011444425A CN112963379A CN 112963379 A CN112963379 A CN 112963379A CN 202011444425 A CN202011444425 A CN 202011444425A CN 112963379 A CN112963379 A CN 112963379A
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- China
- Prior art keywords
- centrifugal
- inducer
- blade
- hub
- blades
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
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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
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing 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)
Abstract
The invention belongs to the technical field of aviation application, and particularly provides an inducer and centrifugal impeller composite structure, which comprises an axle, a hub, an inducing blade and a centrifugal blade; the inducing blades axially and spirally extend to the end face of the hub from the other end of the wheel shaft, the blade profile of the inducing blades gradually transits from the axial flow blade profile to the centrifugal blade profile from the other end of the wheel shaft to the hub, and the axial flow blade profile part and the centrifugal blade profile part are in smooth transition. Compared with the split type inducer and the impeller, the inducer and the impeller are integrally designed, the inducer and the impeller are not required to be connected and matched, the structural reliability is improved, and the problems of backflow, mismatching of attack angles and the like generated at the joint of the inducer and the impeller are effectively avoided. The invention improves the efficiency of the runner, improves the cavitation performance of the pump, reduces pressure pulsation and the like, and reduces the axial length size of the pump.
Description
Technical Field
The invention relates to an aviation application technology, in particular to a composite structure of an inducer and a centrifugal impeller.
Background
The aviation fuel centrifugal pump is widely applied to an aircraft fuel system for oil supply and delivery and the like. The inducer and the impeller are used as main moving hydraulic components of the fuel pump, and the design of the inducer and the impeller is crucial to the performance influence of the whole fuel pump. Generally, the hydraulic component is required to have high efficiency due to the limitation of the electric power of the airplane. Meanwhile, the fuel pump is required to have higher cavitation resistance due to the influence of high altitude cavitation brought to the centrifugal pump by the flying height of the airplane.
Disclosure of Invention
The purpose of the invention is as follows: the rotating wheel with the inducer and the impeller integrated is provided, the efficiency of the rotating wheel is improved, the cavitation performance of the pump is improved, pressure pulsation and the like are reduced, and the axial length dimension of the pump is reduced.
The technical scheme of the invention is as follows: the composite structure of the inducer and the centrifugal impeller comprises an axle, a hub, an inducing blade and a centrifugal blade; the hub is positioned at one end of the wheel shaft, the wheel shaft is perpendicular to the hub, the induction blade axially and spirally extends to the end face of the hub from the other end of the wheel shaft, the blade profile of the induction blade gradually transits from an axial flow blade profile to a centrifugal blade profile from the other end of the wheel shaft to the hub, and the axial flow blade profile part and the centrifugal blade profile part are in smooth transition; the end face of the hub is also provided with the centrifugal blades;
the centrifugal blade profile part of the induction blade and the centrifugal blade are uniformly and annularly distributed on the end face of the hub.
Further, the induction blade is provided with a plurality of blades. Preferably 2 to 4 sheets. More preferably 2 sheets.
Further, the centrifugal blade profile part of the induction blade is the same as the centrifugal blade in structure.
Furthermore, the number of the centrifugal blades distributed between the centrifugal blade profile parts of the adjacent induction blades is 1-5.
Further, the centrifugal blades distributed between the centrifugal profile portions of adjacent induced blades include long centrifugal blades and short centrifugal blades. The long and short centrifugal blade structure can improve the flow field and the pressure field in the impeller, effectively prevent the generation of laminar flow and increase the correction coefficient of the limited blade, thereby improving the performance of the pump and improving the flow velocity distribution and the cavitation performance of the pump.
Furthermore, the end face of the hub is provided with at least one through hole, and the through hole is a balance hole. For balancing the axial forces generated by the runner during on-load operation, the number of balancing holes may generally correspond to the number of blades.
Furthermore, at least one sealing ring groove is formed on the rim of the hub. The sealing ring groove is composed of a plurality of grooves distributed along the axial direction, and the structure is a labyrinth sealing structure which is mainly used for reducing leakage between the rotating wheel and the shell.
Furthermore, the wheel shaft is a hollow shaft, and the hollow shaft is provided with a key groove. The motor shaft is connected with the rotating wheel through the key, so that torque is transmitted to the rotating wheel to drive the rotating wheel to rotate. For those skilled in the art, the key groove is provided with a key, and common keys include a flat key, a semicircular key and the like.
The invention has the beneficial effects that:
the invention designs an inducer and impeller integrated rotating wheel. Compared with the split type inducer and impeller, the inducer and the impeller are designed in an integrated mode, connection and matching between the inducer and the impeller do not need to be considered, reliability of the structure is improved, and the problems of backflow, mismatching of attack angles and the like generated at the joint of the inducer and the impeller are effectively solved. On one hand, the invention improves the efficiency of the rotating wheel, improves the cavitation performance of the pump, reduces pressure pulsation and the like, and reduces the axial length size of the pump.
Description of the drawings:
FIG. 1 is a structural schematic diagram of a split type design of a common inducer and an impeller;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an axial cross-sectional view;
FIG. 4 is a schematic flow line diagram;
fig. 5 is a schematic view showing the positional relationship of each blade on the end face of the hub.
Wherein: the centrifugal impeller comprises a 1-induction blade, a 1 a-axial flow impeller profile part, a 1 b-centrifugal impeller profile part, a 2-centrifugal blade, a 2 a-centrifugal long blade, a 2 b-centrifugal short blade, a 3-wheel shaft, a 4-wheel hub, 5 balance holes, 6-sealing ring grooves and 7-key grooves.
Detailed Description
For a clearer understanding of the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
Embodiment 1, referring to fig. 2, there is provided an inducer and centrifugal impeller composite structure, including a hub 3, a hub 4, an inducing blade 1 and a centrifugal blade 2; the hub 4 is positioned at one end of the wheel shaft 3, the wheel shaft 3 is perpendicular to the hub 4, the inducing blade 1 axially and spirally extends from the other end of the wheel shaft 3 to the end surface of the hub 4, the blade profile of the inducing blade 1 gradually transits from the axial flow blade profile 1a to the centrifugal blade profile 1b from the other end of the wheel shaft to the hub 4, and the axial flow blade profile part 1a and the centrifugal blade profile part 1b are in smooth transition; the centrifugal blades 2 are further arranged on the end face of the hub 4;
the centrifugal blade profile 1b part of the induction blade 1 and the centrifugal blade 2 are uniformly and annularly distributed on the end face of the hub 4.
The inducing blades 1 are multi-piece. Preferably 2 to 4 sheets. More preferably 2 sheets.
The centrifugal blade profile 1b of the inducing blade 1 has the same structure as the centrifugal blade 2.
Furthermore, the number of the centrifugal blades 2 distributed between the centrifugal blade profiles 1b of the adjacent induction blades 1 is 1-5.
The end face of the hub 4 is provided with at least one through hole which is a balance hole 5. The rim of the hub is provided with at least one sealing ring groove 6. The wheel shaft 3 is a hollow shaft, and the hollow shaft is provided with a key groove 7. The motor shaft is connected with the rotating wheel through the key, so that torque is transmitted to the rotating wheel to drive the rotating wheel to rotate.
Embodiment 2, referring to fig. 2 to 5, a composite structure of an inducer and a centrifugal impeller is provided, which includes an axle 3, a hub 4, an inducing blade 1 and a centrifugal blade 2; the hub 4 is positioned at one end of the wheel shaft 3, the wheel shaft 3 is perpendicular to the hub 4, the inducing blade 1 axially and spirally extends from the other end of the wheel shaft 3 to the end surface of the hub 4, the blade profile of the inducing blade 1 gradually transits from the axial flow blade profile 1a to the centrifugal blade profile 1b from the other end of the wheel shaft to the hub 4, and the part of the axial flow blade profile 1a and the part of the centrifugal blade profile 1b are in smooth transition; the centrifugal blades 2 are further arranged on the end face of the hub 4;
the centrifugal blade profile 1b part of the induction blade 1 and the centrifugal blade 2 are uniformly and annularly distributed on the surface of the hub end 4.
The number of the inducing blades 1 is 3.
The centrifugal blade profile 1b of the inducing blade 1 has the same structure as the centrifugal blade 2.
The centrifugal blades 2 distributed between the centrifugal blade profiles 1b of the adjacent inducing blades 1 are 2.
The centrifugal blades 2 distributed between the centrifugal profile 1b portions of adjacent inducer blades 1 comprise long centrifugal blades 2a and short centrifugal blades 2 b.
Claims (10)
1. The utility model provides an inducer and centrifugal impeller composite construction which characterized in that: comprises a wheel shaft, a wheel hub, an inducing blade and a centrifugal blade; the hub is positioned at one end of the wheel shaft, the wheel shaft is perpendicular to the hub, the induction blade axially and spirally extends to the end face of the hub from the other end of the wheel shaft, the blade profile of the induction blade gradually transits from an axial flow blade profile to a centrifugal blade profile from the other end of the wheel shaft to the hub, and the axial flow blade profile part and the centrifugal blade profile part are in smooth transition; the end face of the hub is also provided with the centrifugal blades;
the centrifugal blade profile part of the induction blade and the centrifugal blade are uniformly and annularly distributed on the end face of the hub.
2. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the induction blades are multi-blade.
3. The inducer and centrifugal impeller composite structure according to claim 2, wherein: the number of the inducing blades is 2-4.
4. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the centrifugal blade profile part of the induction blade is the same as the centrifugal blade in structure.
5. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the number of the centrifugal blades distributed between the centrifugal blade profile parts of the adjacent induction blades is 1-5.
6. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the centrifugal blades distributed between the centrifugal profile portions of adjacent inducer blades include long centrifugal blades and short centrifugal blades.
7. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the end face of the hub is provided with at least one through hole which is a balance hole.
8. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the rim of the hub is provided with at least one sealing ring groove.
9. The inducer and centrifugal impeller composite structure according to claim 1, wherein: the wheel shaft is a hollow shaft, and the hollow shaft is provided with a key groove.
10. The inducer and centrifugal impeller composite structure according to claim 2, wherein: the number of the inducing blades is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444425.3A CN112963379A (en) | 2020-12-11 | 2020-12-11 | Composite structure of inducer and centrifugal impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444425.3A CN112963379A (en) | 2020-12-11 | 2020-12-11 | Composite structure of inducer and centrifugal impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112963379A true CN112963379A (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011444425.3A Pending CN112963379A (en) | 2020-12-11 | 2020-12-11 | Composite structure of inducer and centrifugal impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112963379A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
| RU217552U1 (en) * | 2022-12-02 | 2023-04-05 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Pre-engineered axle wheel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204176U (en) * | 1986-06-16 | 1987-06-10 | 中国石化销售公司山西省石油公司 | Multistage horizontal centrifugal pump with induced wheel |
| CN204041526U (en) * | 2014-07-25 | 2014-12-24 | 上海瑞邦机械集团有限公司 | The dynamic sealing device of centrifugal pump |
| CN105545797A (en) * | 2015-12-29 | 2016-05-04 | 西安航天动力研究所 | Integrated impeller with high cavitation resisting performance |
| CN205533389U (en) * | 2016-04-22 | 2016-08-31 | 郑州电力机械厂 | Mechanism is inductiond to centrifugal pump |
-
2020
- 2020-12-11 CN CN202011444425.3A patent/CN112963379A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204176U (en) * | 1986-06-16 | 1987-06-10 | 中国石化销售公司山西省石油公司 | Multistage horizontal centrifugal pump with induced wheel |
| CN204041526U (en) * | 2014-07-25 | 2014-12-24 | 上海瑞邦机械集团有限公司 | The dynamic sealing device of centrifugal pump |
| CN105545797A (en) * | 2015-12-29 | 2016-05-04 | 西安航天动力研究所 | Integrated impeller with high cavitation resisting performance |
| CN205533389U (en) * | 2016-04-22 | 2016-08-31 | 郑州电力机械厂 | Mechanism is inductiond to centrifugal pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
| RU217552U1 (en) * | 2022-12-02 | 2023-04-05 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Pre-engineered axle wheel |
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