CN110953160A - Impeller built-in high-speed centrifugal pump - Google Patents
Impeller built-in high-speed centrifugal pump Download PDFInfo
- Publication number
- CN110953160A CN110953160A CN201911189803.5A CN201911189803A CN110953160A CN 110953160 A CN110953160 A CN 110953160A CN 201911189803 A CN201911189803 A CN 201911189803A CN 110953160 A CN110953160 A CN 110953160A
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- CN
- China
- Prior art keywords
- inducer
- motor
- impeller
- centrifugal pump
- built
- 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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
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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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor 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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/064—Details of the magnetic circuit
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
The invention provides a high-speed centrifugal pump with a built-in impeller, which comprises a shell, a rotating wheel, a motor stator and a motor rotor, wherein the rotating wheel is rotatably arranged in the shell, the motor stator is arranged on the shell, the motor rotor is fixedly connected with the rotating wheel, and the motor rotor rotates by electrifying the motor stator. The rotating wheel comprises an inducer and a centrifugal impeller, and the outer edge of the inducer is provided with an outer ring for eliminating a blade top gap; the outer ring of the inducer is fixedly connected with the inner circle of the motor rotor; the centrifugal impeller and the inducer rotate synchronously. The shaft of the integral device can not penetrate out of the device through the dynamic seal, and leakage is completely avoided, so that the shaft is particularly suitable for conveying toxic and volatile media.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to a high-speed centrifugal pump with a built-in impeller.
Background
The inducer is an axial-flow impeller, and compared with a centrifugal pump impeller, the inducer has stronger anti-cavitation performance and can work in a cavitation state to a certain extent without serious influence on the performance. When the inducer is matched with the centrifugal impeller for use, the lift generated by the inducer can reduce the cavitation allowance of the pump, and the anti-cavitation performance of the pump is improved, so that the design of the centrifugal pump with higher rotating speed can be met. On the other hand, the centrifugal pump on the market at present adopts the motor external, adopts seal structure to prevent fluid leakage between pump and motor, but the sealing of rotating machinery is that how can not accomplish to leak by one hundred, simultaneously, along with the increase of operating time, will appear wearing and tearing on the sealing member certainly, increase the leakage.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the impeller built-in high-speed centrifugal pump, the inner circle of the rotor of the motor is directly fixed with the outer circle of the inducer, so that the shaft of the whole device does not penetrate out of the device through a dynamic seal, the leakage is completely avoided, the impeller built-in high-speed centrifugal pump is particularly suitable for conveying toxic and volatile media, and has higher research value and engineering value. Compared with the traditional centrifugal pump with the inducer, the internal machine of the invention is directly arranged in the device, has no dynamic seal exposed outside, and does not leak outside. Meanwhile, the outer circle of the inducer is directly fixed on the inner circle of the motor rotor, and no gap exists between the tops of the inducer blades, so that the internal leakage of the device is reduced, and the pin number of the whole device is increased. The high-speed centrifugal pump with the built-in impeller has the advantages of compact structure, no external leakage, high efficiency and the like.
The present invention achieves the above-described object by the following technical means.
A high-speed centrifugal pump with a built-in impeller comprises a shell, a rotating wheel, a motor stator and a motor rotor, wherein the rotating wheel is rotatably arranged in the shell, the motor stator is arranged on the shell, the motor rotor is fixedly connected with the rotating wheel, and the motor rotor rotates by electrifying the motor stator.
Further, the rotating wheel comprises an inducer and a centrifugal impeller, and the outer edge of the inducer is provided with an outer ring for canceling blade top gaps; the outer ring of the inducer is fixedly connected with the inner circle of the motor rotor; the centrifugal impeller and the inducer rotate synchronously.
Further, the inducer and the centrifugal impeller are integrated, and no gap exists between the inducer and the centrifugal impeller.
Furthermore, the inducer and the centrifugal impeller are split, the inducer and the centrifugal impeller are respectively in transmission connection with a shaft, the motor rotor drives the inducer to rotate, and the inducer enables the centrifugal impeller to synchronously rotate through the shaft.
Further, the casing includes horn pipe, motor housing and rearmounted stator, motor housing one end and horn pipe are connected, the motor housing other end and rearmounted stator, install motor stator in the motor housing.
Further, still include the motor baffle, the outer lane clearance fit of one end and inducer of motor baffle, the other end of motor baffle is installed between motor housing and the rearmounted stator.
Further, the clearance value between the motor partition plate and the outer ring is 0.001 time of the diameter of the inlet of the shell, and when the value of 0.001 time of the diameter of the inlet of the shell is smaller than 0.2mm, the clearance value is 0.2 mm.
Furthermore, a shielding sleeve is arranged between the motor stator and the motor rotor and used for separating the motor stator from the water body.
Further, the inducer is an axial-flow impeller
The invention has the beneficial effects that:
1. the impeller built-in high-speed centrifugal pump directly fixes the inner circle of the rotor of the motor and the outer circle of the inducer, so that a shaft of the whole device does not penetrate out of the device through a dynamic seal, and leakage is avoided completely.
2. According to the impeller built-in high-speed centrifugal pump, the excircle of the inducer is directly fixed on the inner circle of the motor rotor, no gap exists between the tops of the inducer blades, and internal leakage of the device is reduced.
3. The impeller built-in high-speed centrifugal pump has no dynamic seal communicated with the outside, and does not leak outside.
4. The impeller built-in high-speed centrifugal pump has a simple and compact structure, and can meet the transportation requirements of toxic and volatile media.
5. Compared with the traditional centrifugal pump, the high-speed centrifugal pump with the built-in impeller has shorter axial distance and lighter motor, which are more convenient for field installation.
Drawings
Fig. 1 is an overall structure diagram of a high-speed centrifugal pump with a built-in impeller according to the present invention.
Fig. 2 is a structure diagram of the rotary wheel according to the present invention.
In the figure:
1-a horn tube; 2-motor housing; 3-a motor stator; 4-a motor rotor; 5-motor partition board; 6-rear guide vane; 7-a guide bearing; 8-first dynamic sealing; 9-a rotating wheel; 10-axis; 11-a shielding sleeve; 12-second dynamic seal; 13-a bidirectional thrust bearing; 1 a-leading guide vane; 1 b-a water guide cone; 901-inducer; 902-centrifugal impeller; 9 a-outer ring.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1 and 2, the impeller built-in high-speed centrifugal pump of the present invention comprises a bell pipe 1, a motor housing 2, a motor stator 3, a motor rotor 4, a motor partition 5, a rear guide vane 6, a guide bearing 7, a runner 9, a shaft 10 and a bidirectional thrust bearing 13, wherein the runner 9 is fixed on the shaft 10, and the guide bearing 7 and the bidirectional thrust bearing 13 are respectively installed at two ends of the shaft 10; the one end at motor housing 2 is installed to horn pipe 1, and motor baffle 5 and rearmounted stator 6 are connected gradually to motor housing 2's the other end, motor stator 3 fixes inside motor housing 2. The outer circle of the rotating wheel 9 is fixedly connected with the inner circle of the motor rotor 4, the rotating wheel 9 comprises an inducer 901 and a centrifugal impeller 902, and the outer edge of the inducer 901 is provided with an outer ring 9a for eliminating a blade top gap; the outer ring 9a of the inducer 901 is fixedly connected with the inner circle of the motor rotor 4; the centrifugal impeller 902 and the inducer 901 rotate synchronously.
The inducer 901 and the centrifugal impeller 902 of the runner 9 may be integrated, or may be divided into two bodies. The inducer 901 and the centrifugal impeller 902 are integrated, and no gap exists between the inducer 901 and the centrifugal impeller 902. The inducer 901 and the centrifugal impeller 902 are split, the inducer 901 and the centrifugal impeller 902 are in transmission connection with the shaft 10 respectively, the motor rotor 4 drives the inducer 901 to rotate, and the inducer 901 enables the centrifugal impeller 902 to rotate synchronously through the shaft 10.
One end of the motor clapboard 5 is close to the outer ring 9a of the rotating wheel 9, the gap value between the motor clapboard 5 and the outer ring 9a is 0.001 time of the inlet diameter, and when the value of 0.001 time of the inlet diameter is less than 0.2mm, the gap value is 0.2 mm. The guide vane type water guiding device is characterized in that a front guide vane 1a and a water guiding cone 1b are machined in the horn tube 1, the guide bearing 7 is installed in the water guiding cone 1b, and a first dynamic seal 8 can be further installed at the position, close to the outlet of the water guiding cone 1b, of the guide bearing 7. A shielding sleeve 11 is arranged between the motor stator 3 and the motor rotor 4, and the shielding sleeve 11 is used for separating the motor stator 3 from a water body. The outer ring of the bidirectional thrust bearing 13 is fixed in a middle circular hole of the rear guide vane 6, and a second dynamic seal 12 is arranged at a position close to the outlet of the circular hole.
The installation mode is as follows:
firstly, the installation of a rotor: the motor partition plate 5 is placed on the rotating wheel 9, and the outer circle of the rotating wheel 9 and the inner circle of the motor rotor 3 are fixed. The dynamic seal comprises a packing seal and a mechanical seal. When the packing seal is used, the bidirectional thrust bearing 13 is arranged at one end of the shaft 10 and fixed in the middle round hole of the rear guide vane 6, and then the packing seal is arranged between the shaft 10 and the inner wall of the middle round hole of the rear guide vane 6 to protect the bidirectional thrust bearing 13 from contacting with a fluid medium. When the mechanical seal is used, the mechanical seal and the bidirectional thrust bearing 13 are sequentially installed at one end of the shaft 10, and then the mechanical seal and the bidirectional thrust bearing 13 are fixed in the middle circular hole of the rear guide vane 6.
Then, the runner 9 passes through the shaft 10, and the runner 9 is fixed on the shaft 10 by using a positioning structure.
Install motor stator 3 in motor housing 2's inside, adopt location structure to fix motor stator 3 on motor housing 2, use housing 11 to live motor stator 3 parcel. The motor stator 3 is placed along the axial direction of the motor rotor 4, one end of the motor shell 2 is fixedly connected with the motor partition plate 11 and the rear guide vane 6, and the other end of the motor shell is connected with the horn tube 1.
A guide bearing 7 and a first dynamic seal 8 are sequentially arranged in a water guide cone 1b in the middle of the horn tube 1, and a shaft 10 penetrates into the water guide cone 1b while the horn tube 1 is sleeved in and connected with the motor shell 2, so that the installation is completed.
The working principle is as follows:
when the motor runs, the motor rotor 4 drives the rotating wheel 9 connected with the motor rotor to rotate, the rotating wheel 9 is fixed on the shaft 10, and two ends of the shaft are respectively fixed inside the middle circular holes of the water guide cone 1b and the rear guide vane 6 through the guide bearing 7 and the two-way thrust bearing 13. The guide bearing 7 and the bidirectional thrust bearing 13 are used for restraining the axial displacement and the radial displacement of the rotor and ensuring the normal operation of the device. The fluid medium is driven by the rotation of the runner 9 to flow through the flared tube 1, the runner 9 and the rear guide vane 6 in sequence.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. A high-speed centrifugal pump with a built-in impeller comprises a shell and a rotating wheel (9), wherein the rotating wheel (9) is rotatably arranged in the shell, and the high-speed centrifugal pump is characterized by further comprising a motor stator (3) and a motor rotor (4), wherein the motor stator (3) is arranged on the shell, the motor rotor (4) is fixedly connected with the rotating wheel (9), and the motor rotor (4) is rotated by electrifying the motor stator (3).
2. The impeller built-in high-speed centrifugal pump according to claim 1, wherein the rotating wheel (9) comprises an inducer (901) and a centrifugal impeller (902), and the outer edge of the inducer (901) is provided with an outer ring (9a) for eliminating a blade top gap; the outer ring (9a) of the inducer (901) is fixedly connected with the inner circle of the motor rotor (4); the centrifugal impeller (902) and the inducer (901) rotate synchronously, and the centrifugal impeller (902) is positioned at the tail end of the inducer (901).
3. The impeller built-in high-speed centrifugal pump according to claim 2, wherein the inducer (901) and the centrifugal impeller (902) are integrated, and there is no gap between the inducer (901) and the centrifugal impeller (902).
4. The impeller built-in high-speed centrifugal pump according to claim 2, wherein the inducer (901) and the centrifugal impeller (902) are split, the inducer (901) and the centrifugal impeller (902) are respectively in transmission connection with a shaft (10), the motor rotor (4) drives the inducer (901) to rotate, and the inducer (901) enables the centrifugal impeller (902) to synchronously rotate through the shaft (10).
5. The impeller built-in high-speed centrifugal pump according to any one of claims 1 to 4, characterized in that the housing comprises a flared tube (1), a motor housing (2) and a rear guide vane (6), one end of the motor housing (2) is connected with the flared tube (1), the other end of the motor housing (2) is connected with the rear guide vane (6), and a motor stator (3) is installed in the motor housing (2).
6. The impeller built-in high-speed centrifugal pump according to claim 5, further comprising a motor partition plate (5), wherein one end of the motor partition plate (5) is in clearance fit with an outer ring (9a) of the inducer (901), and the other end of the motor partition plate (5) is installed between the motor casing (2) and the rear guide vane (6).
7. The impeller built-in high-speed centrifugal pump according to claim 6, wherein the clearance between the motor partition plate (5) and the outer ring (9a) has a value of 0.001 times the inlet diameter of the casing, and when the value of 0.001 times the inlet diameter of the casing is less than 0.2mm, the clearance is 0.2 mm.
8. The impeller built-in high-speed centrifugal pump according to claim 5, characterized in that a shielding sleeve (11) is installed between the motor stator (3) and the motor rotor (4), and the shielding sleeve (11) is used for separating the motor stator (3) from a water body.
9. The impeller built-in high-speed centrifugal pump according to any one of claims 2 to 4, wherein the inducer (901) is an axial-flow impeller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911189803.5A CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
| CN202011357400.XA CN112460031B (en) | 2019-11-28 | 2020-11-27 | Impeller built-in high-speed centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911189803.5A CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110953160A true CN110953160A (en) | 2020-04-03 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911189803.5A Pending CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
| CN202011357400.XA Active CN112460031B (en) | 2019-11-28 | 2020-11-27 | Impeller built-in high-speed centrifugal pump |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011357400.XA Active CN112460031B (en) | 2019-11-28 | 2020-11-27 | Impeller built-in high-speed centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN110953160A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253492A (en) * | 2020-09-08 | 2021-01-22 | 江苏大学 | Multistage low-temperature centrifugal pump with built-in motor |
| CN112460031A (en) * | 2019-11-28 | 2021-03-09 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323080A (en) * | 2021-04-15 | 2021-08-31 | 朱福栋 | Efficient mechatronic water supply installation |
| CN114962320B (en) * | 2022-04-22 | 2023-09-22 | 浙江理工大学 | Self-lubricating cooling circulation system for shaftless-driven deep sea mining mixed transportation pump |
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| US6514053B2 (en) * | 2000-02-10 | 2003-02-04 | Toshiba Tec Kabushiki Kaisha | Motor-driven pump with a plurality of impellers |
| US20060099068A1 (en) * | 2004-11-05 | 2006-05-11 | Toshiba Tec Kabushiki Kaisha | Axial flow pump |
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| CN102840142B (en) * | 2012-09-26 | 2015-08-12 | 上海创科泵业制造有限公司 | The multi-stage shield pump that a kind of motor is put |
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| CN203308764U (en) * | 2013-06-18 | 2013-11-27 | 济宁安泰矿山设备制造有限公司 | Mining submerged pump with axial balancing drum |
| CN110030193A (en) * | 2019-05-16 | 2019-07-19 | 上海创科泵业制造有限公司 | Multi-stage shield pump and the water-carriage system for applying it |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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2019
- 2019-11-28 CN CN201911189803.5A patent/CN110953160A/en active Pending
-
2020
- 2020-11-27 CN CN202011357400.XA patent/CN112460031B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6514053B2 (en) * | 2000-02-10 | 2003-02-04 | Toshiba Tec Kabushiki Kaisha | Motor-driven pump with a plurality of impellers |
| US20060099068A1 (en) * | 2004-11-05 | 2006-05-11 | Toshiba Tec Kabushiki Kaisha | Axial flow pump |
| CN104005964A (en) * | 2013-02-26 | 2014-08-27 | 信浓绢糸株式会社 | Electric fluid pump |
| CN204253379U (en) * | 2014-11-15 | 2015-04-08 | 合肥恒大江海泵业股份有限公司 | The built-in submersible axial flow pump of a kind of both stage impellers |
| CN106351852A (en) * | 2016-11-14 | 2017-01-25 | 合肥恒大江海泵业股份有限公司 | Vane wheel built-in submersible electric pump with stator coil protection sleeve |
| WO2019027545A1 (en) * | 2017-08-01 | 2019-02-07 | Baker Hughes, A Ge Company, Llc | Permanent magnet pump |
| CN109538497A (en) * | 2018-12-06 | 2019-03-29 | 合肥恒大江海泵业股份有限公司 | A kind of built-in submersed three-flow pump of dry stator impeller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460031A (en) * | 2019-11-28 | 2021-03-09 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
| CN112253492A (en) * | 2020-09-08 | 2021-01-22 | 江苏大学 | Multistage low-temperature centrifugal pump with built-in motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112460031B (en) | 2022-07-22 |
| CN112460031A (en) | 2021-03-09 |
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