CN102840141B - Centrifugal water pump directly transmitted by single-phase permanent-magnet synchronous motor - Google Patents
Centrifugal water pump directly transmitted by single-phase permanent-magnet synchronous motor Download PDFInfo
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- CN102840141B CN102840141B CN201210328290.3A CN201210328290A CN102840141B CN 102840141 B CN102840141 B CN 102840141B CN 201210328290 A CN201210328290 A CN 201210328290A CN 102840141 B CN102840141 B CN 102840141B
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Abstract
The invention relates to a centrifugal water pump directly transmitted by a single-phase permanent-magnet synchronous motor. The centrifugal water pump directly transmitted by the single-phase permanent-magnet synchronous motor comprises the single-phase permanent-magnet synchronous motor and the centrifugal water pump, wherein the centrifugal water pump is directly transmitted by the single-phase permanent-magnet synchronous motor; the single-phase permanent-magnet synchronous motor comprises a stator and a permanent-magnet rotor which are same in pole number; the permanent-magnet rotor is an inner rotor, and an impeller of the centrifugal water pump is coupled to one axial end of the permanent-magnet rotor. The centrifugal water pump is characterized in that the blade number of the impeller is relative prime with the pole number of the stator or the permanent-magnet rotor, the blade number of the impeller is larger than the pole number of the stator or the permanent-magnet rotor, and the difference value between the blade number and the pole number is not less than 2. With the design, low-frequency noise of the centrifugal water pump disclosed by the invention can be obviously lowered when equipment arranged on the centrifugal water pump operates.
Description
Technical field
The present invention relates to the direct drive Centrifugal water pump of a kind of single-phase permanent-magnet synchronous motor, particularly relate to coordinating of electric electromechanics magnetic structure and fluid mechanics in this water pump, in International Patent Classification (IPC), classification can belong to F04D13/06.
Background technique
The remarkable energy-saving material-saving of the direct drive Centrifugal water pump of cover pole type asynchronous motor compared by the direct drive Centrifugal water pump of single-phase permanent-magnet synchronous motor, but this water pump install equipment operation time low-frequency noise increase to some extent, the prior art usually independent electric electromechanics magnetic structure for this water pump or fluid mechanics is improved, and is all difficult to reach satisfied noise reduction.
Summary of the invention
Technical problem to be solved by this invention is: propose the direct drive Centrifugal water pump of a kind of single-phase permanent-magnet synchronous motor, obviously can reduce the low-frequency noise during equipment operation that this water pump installs.
The technological scheme of technical solution problem of the present invention is: the direct drive Centrifugal water pump of a kind of single-phase permanent-magnet synchronous motor, comprises single-phase permanent-magnet synchronous motor and direct drive Centrifugal water pump thereof; Described single-phase permanent-magnet synchronous motor comprises stator and the p-m rotor of same number of poles; Described p-m rotor is internal rotor, and the impeller of described Centrifugal water pump is coupled in one end of described p-m rotor axis; It is characterized in that: the number of blade of described impeller and the number of poles of described stator or p-m rotor relatively prime, and the number of blade of described impeller is greater than the number of poles of described stator or p-m rotor and this difference is no less than 2.
This is designed with superposing of being beneficial to that main both pulsating forces of being correlated with the number of blade of avoiding the relevant pulsating force of the number of poles of the main of motor in water pump and stator or p-m rotor and resulting from fluid machinery are harmful in low-frequency range, thus this water pump reduces in the intensity of power frequency times frequency vibration & noise, this water pump install equipment operation time low-frequency noise significantly improve.
One of modular design of this technological scheme is: described p-m rotor is 2 poles; The iron core of described stator is U-iron core, and the yoke portion of this iron core penetrates winding, and under shed is configured as two poles of inserting for described p-m rotor; The number of blade of described impeller is odd number.For this water pump low power, the number of blade of impeller is preferably 5 or 7 or 9.
Two of the modular design of this technological scheme is: described p-m rotor is 4 poles; Described stator comprises the circular iron core and winding with 4 salient poles, and described winding is in series by 4 poles by 4 coils being respectively placed on a salient pole; The number of blade of described impeller is 7 or 9 or 11.
Three of the modular design of this technological scheme is: described p-m rotor is 6 poles; Described stator comprises the circular iron core and winding with 6 salient poles, and described winding is in series by 6 poles by 6 coils being respectively placed on a salient pole; The number of blade of described impeller is 11 or 13 or 17.
Accompanying drawing explanation
Fig. 1 is the present invention the 1st embodiment's water pump basic structure schematic diagram;
Fig. 2 is A-A sectional drawing in Fig. 1;
Fig. 3 is B-B sectional drawing in Fig. 1;
Fig. 4 is the present invention the 2nd embodiment's water pump motor basic structure schematic diagram.
Embodiment
The present invention the 1st embodiment's water pump structure as shown in Figures 1 to 3, comprises single-phase permanent-magnet synchronous motor and direct drive Centrifugal water pump thereof.The stator of single-phase permanent-magnet synchronous motor forms primarily of downward opening U-iron core 4 and winding 5; Be configured as two poles, left and right below iron core 4, about this, two poles surround rotor 6; Iron core 4 yoke portion left arm, right arm respectively penetrate 1 coil, and winding 5 is formed by this two coil serial or parallel connection; Rotor 6 is p-m rotor, and radial symmetric magnetizes as N, S bis-pole, between left and right two poles of inserting iron core 4, and is supported in bearing rotary with rotating shaft 10.The width of the air gap between the left pole of iron core 4 and rotor 6 is stepped from top to bottom to be narrowed, between right pole and rotor 6, the width of air gap is stepped from bottom to top narrows, therefore under diagram free state, the axis of rotor 6 two pole magnetic flux for reference, deflects an acute angle with the horizontal axis of stator two pole in the counterclockwise direction.This deflection structure makes single-phase permanent-magnet synchronous motor be realized self-starting simply, also exacerbates the intrinsic power frequency frequency multiplication electric and magnetic oscillation of single-phase synchronous motor and noise, needs suitably to improve.Rotor 6 is rotated in housing 7 by the eccentric mass 1 and the rubber damping post 3 coaxial transmission impeller 2 be fixed on impeller 2 wheel hub being anchored on rotating shaft 10 right-hand member.Certainly, the wheel hub of impeller 2 also directly can be anchored on the end of impeller 2 rotating shaft 10 right-hand member fairly simplely, but has certain influence to startability and running noises.Impeller 2 rotates in housing 7, and namely drive current to suck from water intake 9, discharge toward drain opening 8, impeller 2 is designed to 5 blades.The number of blade of this embodiment's impeller also can depending on hydraulic performance need be designed to 7 or 9.
As shown in Figure 4, this motor mainly comprises the present invention the 2nd embodiment's water pump motor basic structure:
---stator 100, is made up of the circular iron core 101 and winding 102 with 4 salient poles, and the width of the air gap between each pole of iron core and rotor 200 in the counterclockwise direction gradual change narrows, and winding 102 is in series by 4 poles by 4 coils being respectively placed on a salient pole;
---rotor 200, for radial symmetric magnetizes as the 4 pole p-m rotors of N, S, N, S.
Impeller that this water pump is joined has 7 blades, also can depending on hydraulic performance need be designed to 9 or 11.
When needs noise reduction at low speed, this water pump can be designed as its motor and is made up of the circular iron core and winding with 6 salient poles, the width of the air gap between each pole of iron core and rotor in the counterclockwise direction gradual change narrows, and winding is in series by 6 poles by 6 coils being respectively placed on a salient pole; Rotor is that radial symmetric magnetizes as the 6 pole p-m rotors of N, S, N, S, N, S.Now, impeller that water pump is joined has 11 blades, also can depending on hydraulic performance need be designed to 13 or 17.
The embodiment of the present invention is through experimental verification, and the low-frequency noise when the equipment operation that it is installed significantly is improved.
Claims (4)
1. the direct drive Centrifugal water pump of single-phase permanent-magnet synchronous motor, comprises single-phase permanent-magnet synchronous motor and direct drive Centrifugal water pump thereof; Described single-phase permanent-magnet synchronous motor comprises stator and the p-m rotor of same number of poles; Described p-m rotor is internal rotor, and the impeller of described Centrifugal water pump is coupled in one end of described p-m rotor axis; It is characterized in that: the number of blade of described impeller and the number of poles of described stator or p-m rotor relatively prime, and the number of blade of described impeller is greater than the number of poles of described stator or p-m rotor, and the difference that the number of blade of impeller deducts the number of poles of described stator or p-m rotor is no less than 2.
2. according to the direct drive Centrifugal water pump of single-phase permanent-magnet synchronous motor described in claim 1, it is characterized in that: described p-m rotor is 2 poles; The iron core of described stator is U-iron core, and the yoke portion of this iron core penetrates winding, and under shed is configured as two poles of inserting for described p-m rotor; The number of blade of described impeller is 5 or 7 or 9.
3. according to the direct drive Centrifugal water pump of single-phase permanent-magnet synchronous motor described in claim 1, it is characterized in that: described p-m rotor is 4 poles; Described stator comprises the circular iron core and winding with 4 salient poles, and described winding is in series by 4 poles by 4 coils being respectively placed on a salient pole; The number of blade of described impeller is 7 or 9 or 11.
4. according to the direct drive Centrifugal water pump of single-phase permanent-magnet synchronous motor described in claim 1, it is characterized in that: described p-m rotor is 6 poles; Described stator comprises the circular iron core and winding with 6 salient poles, and described winding is in series by 6 poles by 6 coils being respectively placed on a salient pole; The number of blade of described impeller is 11 or 13 or 17.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328290.3A CN102840141B (en) | 2012-09-06 | 2012-09-06 | Centrifugal water pump directly transmitted by single-phase permanent-magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328290.3A CN102840141B (en) | 2012-09-06 | 2012-09-06 | Centrifugal water pump directly transmitted by single-phase permanent-magnet synchronous motor |
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| CN102840141A CN102840141A (en) | 2012-12-26 |
| CN102840141B true CN102840141B (en) | 2015-03-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156343B (en) * | 2015-07-05 | 2017-10-27 | 江门市金羚排气扇制造有限公司 | A kind of low-power ventilating fan |
| CN105156339B (en) * | 2015-10-02 | 2017-12-01 | 江门市地尔汉宇电器股份有限公司 | A kind of small-size centrifugal pump of U-iron core single-phase permanent-magnet synchronous motor driving |
| CN105201885B (en) * | 2015-10-07 | 2017-10-10 | 江门市金羚排气扇制造有限公司 | A kind of ventilation fan of single-phase self-starting permanent magnet synchronous motor direct drive |
| CN107762880A (en) * | 2017-11-15 | 2018-03-06 | 浙江威邦机电科技有限公司 | A kind of swimming pool filter pump water pump |
| CN110094357B (en) * | 2019-04-03 | 2021-07-06 | 青岛经济技术开发区海尔热水器有限公司 | Impeller for centrifugal pump, centrifugal pump and household appliance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3516061A1 (en) * | 1984-05-05 | 1986-01-09 | Vitakraft-Werke Wührmann & Sohn, 2800 Bremen | Centrifugal pump |
| EP0610826A2 (en) * | 1993-02-12 | 1994-08-17 | ASKOLL S.p.A. | Improved centrifugal pump |
| CN201282391Y (en) * | 2008-09-12 | 2009-07-29 | 美的集团有限公司 | Single-phase permanent magnet synchronous motor |
| CN202732377U (en) * | 2012-09-06 | 2013-02-13 | 江门市地尔汉宇电器股份有限公司 | Centrifugal water pump directly driven by single-phase permanent-magnet synchronous motor |
-
2012
- 2012-09-06 CN CN201210328290.3A patent/CN102840141B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3516061A1 (en) * | 1984-05-05 | 1986-01-09 | Vitakraft-Werke Wührmann & Sohn, 2800 Bremen | Centrifugal pump |
| EP0610826A2 (en) * | 1993-02-12 | 1994-08-17 | ASKOLL S.p.A. | Improved centrifugal pump |
| CN201282391Y (en) * | 2008-09-12 | 2009-07-29 | 美的集团有限公司 | Single-phase permanent magnet synchronous motor |
| CN202732377U (en) * | 2012-09-06 | 2013-02-13 | 江门市地尔汉宇电器股份有限公司 | Centrifugal water pump directly driven by single-phase permanent-magnet synchronous motor |
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| CN102840141A (en) | 2012-12-26 |
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Address after: 529040 No. 336 Qing Lan Road, hi tech Development Zone, Guangdong, Jiangmen Patentee after: Hanyu Group Co., Ltd. Address before: 529040 No. 336 Qing Lan Road, hi tech Development Zone, Guangdong, Jiangmen Patentee before: Jiangmen Idear-hanyu Electrical Joint-stock Co., Ltd. |