CN106887910A - The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives - Google Patents

The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives Download PDF

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Publication number
CN106887910A
CN106887910A CN201710105731.6A CN201710105731A CN106887910A CN 106887910 A CN106887910 A CN 106887910A CN 201710105731 A CN201710105731 A CN 201710105731A CN 106887910 A CN106887910 A CN 106887910A
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CN
China
Prior art keywords
cylinder
rotor
centrifugal pump
iron core
stator
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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
Application number
CN201710105731.6A
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Chinese (zh)
Inventor
叶露微
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叶露微
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Application filed by 叶露微 filed Critical 叶露微
Priority to CN201710105731.6A priority Critical patent/CN106887910A/en
Publication of CN106887910A publication Critical patent/CN106887910A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/02Details of the magnetic circuit characterised by the magnetic material
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03Machines characterised by aspects of the air-gap between rotor and stator

Abstract

The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives, including receded disk impeller and the coaxial transmission impeller U-iron core single-phase permanent-magnet synchronous motor, the motor includes:P-m rotor, is cylinder that radial direction the two poles of the earth are magnetized;Stator, including "U" shaped stator core and the stator winding that is passed through of the iron core;The arm top of the "U" shaped two is configured to lean on toward the left pole shoe on the left of the p-m rotor face of cylinder and by toward the right pole shoe on the right side of the p-m rotor face of cylinder, the width of air gap is narrowed in the direction of rotation that each pole lower edge sets between the pole shoe and rotor, thus in a free state, the axis of rotor magnetic pole, as reference, a sharp angle is deflected along the direction of rotation of setting with the axis of stator;Impeller diameter is 20~70mm;The face of cylinder of the p-m rotor is anchored in the cylinder that magnetically soft alloy is made.The design can weaken vibration noise caused by speed ripple.

Description

The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives
Technical field
The present invention relates to the small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives, more particularly to its machine The cooperation of tool and electromagnetic structure;In International Patent Classification (IPC), classification belongs to F04D25/06 or F04D27/00.
Background technology
Using having a large capacity and a wide range, long operational time needs manufacture low cost and energy saving in running badly to small-size centrifugal pump.It is small for tradition Using Asynchronous Motor Driving down to the relatively low situation of efficiency, prior art proposes to change by U-iron core single-phase permanent type centrifugal pump Synchronous motor directly drives and energy-conservation and small volume and cost are relatively low, but there are Instantaneous Speed Fluctuations and cause to shake during operating Moving noise.Earlier application CN201510650496.1 of the visible the applicant of the prior art etc..
The content of the invention
The technical problems to be solved by the invention are to propose a kind of small-size centrifugal pump, can be by U-iron core single-phase permanent magnetic synchronous Motor directly drives, but can effectively reduce vibration noise, and cost is relatively low.
The technical scheme that the present invention solves the technical problem is that a kind of U-iron core single-phase permanent-magnet synchronous motor drives Small-size centrifugal pump, including receded disk impeller and the coaxial transmission impeller U-iron core single-phase permanent-magnet synchronous motor, this is electronic Machine includes:
--- p-m rotor, is cylinder that radial direction the two poles of the earth are magnetized;
--- stator, including "U" shaped stator core and the stator winding that is passed through of the iron core;
--- the arm top of the "U" shaped two is configured to lean on toward the left pole shoe on the left of the p-m rotor face of cylinder and by past Right pole shoe on the right side of the p-m rotor face of cylinder, the rotation that the width of air gap sets in each pole lower edge between the pole shoe and rotor Turn direction to narrow, thus in a free state, the axis of rotor magnetic pole with the axis of stator as reference, along the direction of rotation of setting Deflect a sharp angle;
The impeller diameter is 20~70mm;
It is characterized in that:The face of cylinder of the p-m rotor is anchored in the cylinder that magnetically soft alloy is made.
The quality of the cylinder increases the inertia damping to the Instantaneous Speed Fluctuations of rotor.Importantly, fixed according to Lenz Rule, the cylinder is both made up of magnetically soft alloy, and its satisfactory electrical conductivity can produce electromagnetism resistance to the Instantaneous Speed Fluctuations of p-m rotor Buddhist nun, thus weaken vibration noise caused by speed ripple;Its good magnetic conductivity makes its position for occupying allow the low loss of operating magnetic field flux Pass through, thus be maintained the efficiency of motor, without increasing electromagnetic material cost.
One of further design of above-mentioned technical proposal is:The magnetically soft alloy is electrical pure iron.Electrical pure iron has excellent Elegant magnetic conductivity and the performance for being easy to machine cut or pressure processing, its moderate electrical conductivity are producing enough electromagnetic dampings On the basis of, rotor circuit power factor can be improved and larger induction torque is produced, improve startability.
The two of the further design of above-mentioned technical proposal are:The magnetically soft alloy is ferritic stainless steel.Its electromagnetic performance Less than electrical pure iron, but without anticorrosion.
Technical scheme and effect will be further described with reference to accompanying drawing in a specific embodiment.
Brief description of the drawings
Fig. 1 is the main Visual figures of the basic mechanical structure of embodiment of the present invention centrifugal pump.
Fig. 2 is embodiment of the present invention centrifugation pump motor electromagnetism basic structure schematic diagram.
Specific embodiment
The embodiment of the present invention be on the basis of embodiment centrifugal pump described in CN201510650496.1 specifications improve and Into its machinery, electromagnetic structure substantially as depicted in figs. 1 and 2, is inherited centrifugal pump described in CN201510650496.1 specifications and implemented The structure design of example (can accordingly compare the Figure of description 1,6 of CN201510650496.1) includes:
--- (Fig. 1 shows the laminated core 3 and winding 12 of the motor stator to U-iron core single-phase permanent-magnet synchronous motor And the section of p-m rotor 1) and its through the receded disk impeller 105 of an actuating mechanism coaxial transmission.Receded disk impeller 105 has 4 blades;By hydraulic demand, the number of blade can also be 3,5 or 6, but had better not be more than 8, and according to odd number piece, more have Beneficial to reduction vibration noise.Impeller is injection moulding, diameter 60mm.Impeller is unsuitable excessive excessive down to rotary inertia, to coordinate The still less big staring torque of motor;But it is also unsuitable too small, with the rotary inertia with enough corresponding control methods.
--- wound impeller plays the pump cover 106 of volute;
--- support or/and close the pump housing 107, the bearing 108 of the permasyn morot, impeller 105 and pump cover 106 With the grade annex of sealing ring 109;
--- play impermeable role between rotor drum 171, the stator and rotor for inserting in the permasyn morot.
--- the cylindrical magnet rotor 1 that radial direction the two poles of the earth are magnetized;
--- stator 2, including illustrate the laminated core 3 and stator winding 12 of "U" shaped;Stator winding 12 be wound in it is left, By the plastic packaging of top layer plastics 122 it is one overall after right two plastic cord coil 121;The left arm 31 and right arm 32 of iron core 3 are passed through respectively The top exposed after 121 left and right two endoporus of plastic cord coil forms pole-face and leans on toward the face of cylinder of rotor 1 left side and the left pole on right side Boots 311 and right pole shoe 316;Polar front shape forms two sections of arc surfaces coaxial with rotor 1 of ladder connection for indent:Along clockwise Direction, the less arc surface of the larger arc surface of radius, followed by radius before this;Plane where the upper and lower pole tip of left pole shoe 311 Symmetry axis 30 with plane where the upper and lower pole tip of right pole shoe 316 with diagram "U" shaped is parallel, and stator field axis 20 is then It is vertical with symmetry axis 30.Therefore, it is magnetic resistance that the field axis 10 of p-m rotor 1 is i.e. short to air gap relative to stator field axis 20 Small direction is to deflect an angle beta 0 naturally clockwise, constitutes and starts angle.The design can avoid rotor in a free state So-called " dead point " position that detent torque when its axis overlaps with the axis of stator salient poles and makes energization is zero is stayed in, is formed Reluctance torque also help prevent operating in rotor do not produce torque when alternating current zero passage and stall.But the exactly electricity Magnetic structure makes to produce reluctance torque to vibrate during motor running.
Said stator structure is yoke to illustrate the horizontal segment 33 that two vertical arms 31,32 of "U" shaped are pole body and bottom, But also have with illustrate the horizontal segment of "U" shaped bottom as pole body and two vertical arms be the structure of yoke, the stator winding of the latter It is wound on only 1 bobbin of pole body.
On the visible China Machine Press of U-iron core single-phase permanent-magnet synchronous motor more detailed information version in 2009 《Small-power permanent magnet motor principle, design and application》.
The embodiment of the present invention is mainly compared to the improvement of embodiment centrifugal pump described in CN201510650496.1 specifications:
--- the cylinder 100 that electrical pure iron is made is increased, it is tightly placed in former p-m rotor external cylindrical surface, sees Fig. 1 and Fig. 2 (can respectively compare the Figure of description 1,6 of CN201510650496.1).
Due to less demanding and be reduces cost, electrical pure iron is from the trade mark DT3 in national standard.Use the electrician Pure iron material is drawn into internal diameter and corresponds to the cylindrical shape of former p-m rotor external diameter, and takes axially long with former p-m rotor identical Degree, then former p-m rotor is penetrated in cylinder, reaches fixation while to p-m rotor end and axle sleeve injection molding, or with Tight fit tolerance is directly fastened.
The wall thickness of cylinder takes 0.15~0.8mm.Generally thicker, electromagnetic damping effect is better and startability is slightly worse, and right The useful space is utilized and slightly reduced.Can suitably be adjusted according to experiment, resultant effect.
Because electrical pure iron gets rusty easily, it is necessary to take appropriate rust preventing by prior art depending on use condition, including To the inside and outside face of cylinder plating of cylinder or compound fine copper or thin layer of pure aluminiurn.The thin layer is except can also strengthen electromagnetic damping effect in addition to antirust Really.Wherein, it is higher based on induced-current frequency when starting to cylinder inner cylinder face plating or compound fine copper or thin layer of pure aluminiurn, have Beneficial to taking into account startability and electromagnetic damping.
Certainly, can also be changed to use 400 series ferritic stainless steels.
The control circuit and method of the water pump can still according to embodiment described in CN201510650496.1 specifications.Work as impeller When not needing directional-rotation, motor winding can also directly input AC power and work without electronic switching circuit.

Claims (5)

1. the small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives, including receded disk impeller and coaxial transmission The U-iron core single-phase permanent-magnet synchronous motor of the impeller, the motor includes:
--- p-m rotor, is cylinder that radial direction the two poles of the earth are magnetized;
--- stator, including "U" shaped stator core and the stator winding that is passed through of the iron core;
--- the arm top of the "U" shaped two is configured to lean on toward the left pole shoe on the left of the p-m rotor face of cylinder and by described in Right pole shoe on the right side of the p-m rotor face of cylinder, the rotation side that the width of air gap sets in each pole lower edge between the pole shoe and rotor To narrowing, thus in a free state, the axis of rotor magnetic pole with the axis of stator as reference, along the direction of rotation deflection of setting One sharp angle;
The impeller diameter is 20~70mm;
It is characterized in that:The face of cylinder of the p-m rotor is anchored in the cylinder that magnetically soft alloy is made.
2. according to centrifugal pump described in claim 1, it is characterised in that the magnetically soft alloy is electrical pure iron.
3. according to centrifugal pump described in claim 1, it is characterised in that the magnetically soft alloy is ferritic stainless steel.
4. according to centrifugal pump described in claim 1 or 2 or 3, it is characterised in that the wall thickness of cylinder is 0.15~0.8mm.
5. according to centrifugal pump described in claim 1 or 2 or 3, it is characterised in that the cylinder inner cylinder face plating or compound fine copper Or thin layer of pure aluminiurn.
CN201710105731.6A 2017-02-27 2017-02-27 The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives Pending CN106887910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710105731.6A CN106887910A (en) 2017-02-27 2017-02-27 The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710105731.6A CN106887910A (en) 2017-02-27 2017-02-27 The small-size centrifugal pump that a kind of U-iron core single-phase permanent-magnet synchronous motor drives

Publications (1)

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CN106887910A true CN106887910A (en) 2017-06-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109217507A (en) * 2017-07-04 2019-01-15 莱维特朗尼克斯有限责任公司 It being capable of maglev rotor and the rotary machine with this rotor
CN112865376A (en) * 2021-01-08 2021-05-28 宁波诺丁汉大学 Integrated damping winding, rotor and motor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251893A (en) * 1995-03-03 1996-09-27 Suiken:Kk Submergible pump
JP2001251835A (en) * 2000-03-03 2001-09-14 Cryodevice Inc Linear vibration actuator
CN102013780A (en) * 2009-09-07 2011-04-13 德昌电机(深圳)有限公司 Miniature brushless motor
CN105201864A (en) * 2015-10-07 2015-12-30 叶露微 Small centrifugal pump driven by U-shaped iron core single-phase permanent-magnet synchronous motor
CN105490412A (en) * 2014-08-06 2016-04-13 德昌电机(深圳)有限公司 Motor rotor and brushless DC motor applying same
CN106230152A (en) * 2016-09-26 2016-12-14 威灵(芜湖)电机制造有限公司 Rotor core assembly, rotor and self-starting permanent magnet synchronous motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251893A (en) * 1995-03-03 1996-09-27 Suiken:Kk Submergible pump
JP2001251835A (en) * 2000-03-03 2001-09-14 Cryodevice Inc Linear vibration actuator
CN102013780A (en) * 2009-09-07 2011-04-13 德昌电机(深圳)有限公司 Miniature brushless motor
CN105490412A (en) * 2014-08-06 2016-04-13 德昌电机(深圳)有限公司 Motor rotor and brushless DC motor applying same
CN105201864A (en) * 2015-10-07 2015-12-30 叶露微 Small centrifugal pump driven by U-shaped iron core single-phase permanent-magnet synchronous motor
CN106230152A (en) * 2016-09-26 2016-12-14 威灵(芜湖)电机制造有限公司 Rotor core assembly, rotor and self-starting permanent magnet synchronous motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
化学工业部人事教育司,化学工业部教育培训中心: "《化工检修钳工工艺学》", 31 January 1997, 化学工业出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109217507A (en) * 2017-07-04 2019-01-15 莱维特朗尼克斯有限责任公司 It being capable of maglev rotor and the rotary machine with this rotor
CN112865376A (en) * 2021-01-08 2021-05-28 宁波诺丁汉大学 Integrated damping winding, rotor and motor
CN112865376B (en) * 2021-01-08 2022-04-12 宁波诺丁汉大学 Integrated damping winding, rotor and motor

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Application publication date: 20170623

RJ01 Rejection of invention patent application after publication