CN101392753A - Pump - Google Patents

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Publication number
CN101392753A
CN101392753A CNA2008101656296A CN200810165629A CN101392753A CN 101392753 A CN101392753 A CN 101392753A CN A2008101656296 A CNA2008101656296 A CN A2008101656296A CN 200810165629 A CN200810165629 A CN 200810165629A CN 101392753 A CN101392753 A CN 101392753A
Authority
CN
China
Prior art keywords
pump
stator
rotor
divider
impeller
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
Application number
CNA2008101656296A
Other languages
Chinese (zh)
Inventor
关孝文
桥本俊治
西方政昭
末松真二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of CN101392753A publication Critical patent/CN101392753A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • F04D13/0673—Units comprising pumps and their driving means the pump being electrically driven the motor being of the inside-out type
    • 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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A pump includes an impeller for sucking and discharging liquid, a pump case having a suction port and a discharge port through which the liquid is sucked and discharged, and a partition cooperating with the pump case to form a pump chamber in which the impeller is rotatably received. The pump is further includes a rotor having a magnet for rotatingly driving the impeller and a stator having claw-shaped magnetic poles for applying a rotational driving force to the rotor, the rotor and the stator constituting a claw pole type motor that serves as a driving power source of the pump. At least the stator is entirely coated with a molded resin.

Description

Pump
Technical field
The present invention relates to a kind of pump that includes claw pole type motor, and relate in particular to a kind of technology that improves pump efficiency and reduce the pump size.
Background technique
Known pump is used for suction and discharges for example liquid, and it adopts the claw pole type motor with claw-type pole to be used as motor, is used for rotatably drives impeller (for example see Japan Patent openly apply for No.2003-505648).This claw pole type motor is simple in structure, thereby advantage is that productivity height and cost of production are low.
Usually, this pump comprises: be used to aspirate the impeller with drain; Pump casing with suction and discharge port; Form the divider of pump chamber with pump casing, impeller rotatably is contained in the pump chamber; Rotor, it has and is used for the magnet of drives impeller rotatably; And stator, it has the claw-type pole that is used for applying to rotor rotary driving force.Rotor and stator by divider each other liquid thickly isolate.
In this pump, have and improve suction and discharge ability (pump efficiency) and demand reduced in size.
Summary of the invention
In view of above-mentioned, the invention provides a kind of also pump reduced in size of guaranteeing to raise the efficiency.
According to the present invention, a kind of pump is provided, comprising: be used to aspirate impeller with drain; Pump casing with suction ports and discharge port, liquid is sucked and discharges by this suction ports and discharge port; Form the divider of pump chamber with pump casing, impeller rotatably is contained in the pump chamber; Rotor, it has and is used for the magnet of drives impeller rotationally; And stator, it has the claw-type pole that applies rotatable driving force to rotor, and described rotor and stator constitute claw pole type motor, and as the driving power source of pump, wherein stator is coated with molding resin fully at least.
In order to improve pump efficiency and to reduce the pump size in the pump that uses claw pole type motor as its driving power source, stator is coated with molding resin fully or stator is made of dust core.
Pump in accordance with the present invention, stator are coated with molding resin fully, thereby are drawn into the heat of the liquid in the pump casing and the heat that sends from motor (rotor and stator) is shed by molding resin by suction ports.This feasible efficient that can improve pump.By pump of the present invention, molding resin is used for heat radiation.This has eliminated necessity that cooling unit need additionally be provided, and this helps to reduce the size of pump itself.
Adopt pump of the present invention, stator is made of dust core.This can suppress the generation of eddy current, and reduces current loss, and the result has improved pump efficiency.Because stator is made of dust core in pump of the present invention, can reduces the thickness of stator itself, and finally reduce the size of pump itself.
Description of drawings
The embodiment's who provides in conjunction with the drawings detailed description, purpose of the present invention and feature will be very obvious, in the drawings:
Fig. 1 is the perspective view according to the pump of first embodiment of the invention;
Fig. 2 is the sectional view along Fig. 1 center line A-A intercepting;
Fig. 3 is the sectional view according to the pump of second embodiment of the invention;
Fig. 4 is the sectional view according to the pump of fourth embodiment of the invention;
Fig. 5 is the sectional view of conventional pump, and wherein magnetic pole is detected by Hall transducer; And
Fig. 6 is the portion's view according to the pump of fifth embodiment of the invention.
Embodiment
Below with reference to the accompanying drawing that constitutes the embodiment of the invention part exemplary embodiment of the present invention is described.
First embodiment
Fig. 1 is the perspective view according to the pump of first embodiment of the invention.Fig. 2 is the sectional view along the line A-A intercepting of Fig. 1.
Pump according to first embodiment comprises: be used to aspirate the impeller 1 with drain; Pump casing 4 with suction ports 2 and discharge port 3, liquid is sucked and discharges by suction ports and discharge port; Form the divider 6 of pump chamber 5 with pump casing 4, impeller 1 rotatably is contained in the pump chamber 5; Rotor 8, it has and is used for the magnet 7 of drives impeller 1 rotatably; Stator 10, it has the claw-type pole 9 that is used for rotor 8 is applied rotary driving force; And control circuit board 11, be used to control the magnetic field that produces by stator 10.Rotor 8, stator 10 and control circuit board 11 constitute claw pole type motor, and it is as the driving power source of pump.
First embodiment's pump adopts claw pole type motor to be used as it and drives power source, and this claw pole type motor has so-called outer-rotor structure, and its rotor 8 is arranged in the outside of divider 6, and stator 10 is arranged in the inboard of divider 6.
Be connected to by the divider 6 that will be used to make rotor 8 and the close isolation of stator 10 liquid and form pump chamber 5 on the pump casing 4, wherein the suction ports 2 of this pump casing 4 is opened in the central authorities of top surface and is discharged port 3 and is formed in the sidewall.The seal element (not shown) that is used for pump component and motor part watertight ground are separated is arranged in the attachment portion of pump casing 4 and divider 6.
Impeller 1 is rotatably supported with respect to the stationary axle 12 that is located in the pump chamber 5 by bearing part 13.When stationary axle rotates, 1 pair of liquid that is drawn in the pump chamber 5 by suction ports 2 of impeller applies centrifugal force, thereby by discharging port 3 liquid is discharged from pump.Liquid by impeller 1 suction and discharge can be the hot water that for example is heated to about 80 ℃ of temperature.Take-up reel 45 is arranged in the top of bearing part 13.
Rotor 8 has the cylindrical body integrally formed with impeller 1.The magnet 7 that forms magnetic loop (magnetic flux) is arranged in the inwall of cylindrical body of rotor 8.In between magnet 7 and partition wall 6, be provided with gap (empty every), this gap is enough to keep magnet 7 not contact in the rotary course of rotor 8 with divider 6.
Stator 10 is arranged in cylindrical rotor 8 inboards with opposed facing relation, and divider 6 is clipped in therebetween.Stator 10 comprises the iron core of (the pawl utmost point) 9 that have a plurality of claw-type poles and is arranged in circular coil (winding) 15 in the iron core by the insulation board (not shown).Stator 10 can be surperficial each other to contacting outwardly with divider 6.Stator 10 is coated with the molding resin 40 that is made of for example unsaturated polyester fully.
Adopt this claw-pole type stator 10, the magnetic field that is produced by excitation circular coil 15 can be transferred to rotor 8 from claw-type pole 9 with the efficient that increases.
Control circuit board 11 is located at the rear side of stator 10.In response to the signal that sends from the position detector (not shown), the magnetic field that control circuit board 11 controls are produced by circular coil 15.Control circuit board 11 and stator 10 are coated with molding resin 40.
In the pump of as above structure, along with the magnetic field that produces by excitation circular coil 15 is transferred to magnet 7 from claw-type pole 9, magnet 7 is attracted and repels so that with the integrally formed impeller 1 of rotor 8 around stationary axle 12 rotations.Thereby the rotation of impeller 1 starts a pumping aspiration procedure liquid to be sucked in the pump chamber 5 by suction ports 2, and pressurized in pump chamber 5.The liquid of pressurization is by radially pumping and discharge from pump by discharging port 3 circumferentially.
Along with the excitation of circular coil 15, stator 10 produces heat.Liquid by impeller 1 suction and discharge is aforesaid about 80 ℃ hot water.Therefore, motor meeting heating, the reduction that this may cause suction and discharge efficient (electric efficiency).Because be coated with molding resin 40 fully according to embodiments of the invention stator 10, the heat of the liquid that can come out with the heat of motor and from motor by molding resin 40 dissipates.Therefore, adopt the pump of present embodiment, can not adopt the extra cooling unit just can cooling motor, this helps to improve electric efficiency and reduces motor cost.
In addition, because embodiments of the invention stator 10 can be protected stator 10 and increase its intensity according to being coated with molding resin 40 fully with molding resin 40.
In the pump of present embodiment, the internal pressure of pump chamber 5 increases along with the rotation of impeller 1.This internal pressure acts on divider 6.Thickness at divider 6 increases to guarantee that pressure drag is enough to resist under the situation of internal pressure, and it is big that motor size can become.By adopting wherein stator 10 and divider 6 surfaces to contacting structure outwardly, stator 10 can stand and reduce to be applied to pressure on the divider 6.Therefore, in the pump of present embodiment, can increase the internal hydraulic pressure of pump and divider 6 is thickened.In addition, because the thickness of divider 6 can reduce, can reduce the cost of material of pump in the present embodiment.
Second embodiment
In the pump according to second embodiment of the invention, stator 10 ' is made of dust core.Other structures of second embodiment's pump are with identical at external rotor type pump structure described above in conjunction with first embodiment, and just stator 10 ' is not coated with molding resin 40.Parts different with first embodiment among second embodiment is described below, and identical part is omitted, and repeats no more.
Fig. 3 is the sectional view according to the pump of second embodiment of the invention, and second embodiment's pump adopts the stator 10 ' that is formed by dust core, and it is by in the cavity that Magnaglo is filled into mould and compress this Magnaglo and be molded as.Dust core is a kind of like this structure, and wherein, independently abrasive grit scribbles inorganic insulating membrane and by together resin-bonded.The advantage of dust core is that it has the iron loss (eddy current loss) that reduces under high frequency.
Because stator 10 ' is made of dust core as mentioned above in second embodiment's pump, can in the high frequency band of hundreds of kHz, use stator 10 ', in this frequency band, the stator of being made by electromagnetic steel plate or ferrite-plate can not be used satisfactorily up to now.In addition, the size of pump is further reduced, and has simultaneously and available the same performance in conventional pump.
The 3rd embodiment
Combine according to the pump of third embodiment of the invention pump by first and second embodiments.The 3rd embodiment's pump is identical with first embodiment's illustrated in figures 1 and 2 pump structure, just its be by made up stator 10 wherein be coated with fully the structure (first embodiment's structure) of molding resin 40 and wherein the structure (second embodiment's structure) that constitutes by dust core of stator 10 ' form.
The 3rd embodiment's pump provides second embodiment and first embodiment's advantage.Therefore, the heat that can be by effectively distributing motor and the heat of liquid increase electric efficiency.Can also reduce the size of pump, allow pump in high frequency band, to use simultaneously.
Adopt embodiment's pump, relatively low by the stator 10 ' intensity that dust core is made.But, can protect stator 10 ' to avoid external force by whole stator 10 ' is applied molding resin 40.
The 4th embodiment
In the pump according to fourth embodiment of the invention, not only whole stator 10 but also divider 6 all are coated with molding resin 40.Other structures of the 4th embodiment's pump are with identical in conjunction with the aforesaid external rotor type pump structure of first embodiment.Only describe the part different among the 4th embodiment below, and the description of same section is omitted, repeat no more with first embodiment.
Fig. 4 is the sectional view according to the pump of fourth embodiment of the invention.In the 4th embodiment's pump, except stator 10 wherein is coated with the structure of molding resin 40 (first embodiment's structure) fully, divider 6 also is coated with molding resin 40 fully.
Because divider 6 also is coated with molding resin 40 fully, in the 4th embodiment's pump, the contact surface between divider 6 and the molding resin 40 increases.Therefore, the 4th embodiment's pump not only has available advantage in first embodiment but also has the advantage of the heat of the liquid that can more effectively distribute the motor heat and pass through divider 6 transmission.Therefore, adopt the 4th embodiment's pump that electric efficiency is further enhanced.
In this pump, usually adopt driving method as shown in Figure 5, wherein magnet 7 as rotor and the time of supplying electric current by controlling with Hall transducer 41 detection magnetic poles.But, in like this example, to use under the such situation of Hall transducer 41, the size of pump own increases.For preventing that the pump size from increasing, the magnetic pole of magnet 7 can detect according to the waveform of electric current, thereby has eliminated the demand of using Hall transducer 41.The magnetic pole that detects magnet 7 according to current waveform can be used for first to the 3rd embodiment's pump and the 4th embodiment's pump.This has eliminated necessity that Hall transducer 41 is installed near rotor 8.Therefore, can reduce the size of pump itself.
The 5th embodiment
Adopt claw pole type motor to drive power source as it according to the pump of fifth embodiment of the invention, this claw pole type motor has inner rotor core, wherein rotor arrangements in the divider inboard and stator arrangement in the divider outside.Fig. 6 is the sectional view according to the 5th embodiment's pump.
The 5th embodiment's pump comprises impeller 21, and it is used for suction and drain; Pump casing 24, it has suction ports 22 and discharges port 23, and liquid is sucked and discharges by suction ports and discharge port; Divider 26, it forms pump chamber 25 with pump casing 24, and impeller 1 rotatably is contained in this pump chamber; Rotor 28, it has and is used for the magnet 27 of drives impeller 21 rotatably; Stator 30, it has the claw-type pole (not shown) that is used for applying to rotor 28 rotatable driving force; And control circuit board 31, be used to control the magnetic field that produces by stator 30.Rotor 28, stator 30 and circuit board 31 constitute claw pole type motor, as the driving power source of pump.
The 5th embodiment's pump adopts claw pole type motor to drive power source as it, and this claw pole type motor has so-called inner rotor core, and its rotor 28 is arranged in divider 26 inboards and stator 30 is arranged in the outside of divider 26.
Linking to each other with pump casing 24 by the divider that will be used to make rotor 28 thickly isolate (being used for separate pump part and motor part) with stator 30 liquid forms pump chamber 25, and the suction ports 22 of pump casing is opened in top surface central authorities, is formed in the sidewall and discharge port 23.The seal element 29 that is used for pump component and motor part liquid are thickly separated is arranged in the attachment portion of pump casing 24 and divider 26.
Rotor 28 has the cylindrical body that forms with impeller 21.The magnet 27 that forms magnetic loop (magnetic flux) is arranged in the outer wall of cylindrical body of rotor 28.Rotor 28 is rotatably supported around stationary axle 34 by bearing part 35, and each end opposite of this stationary axle is coupled to respectively in the axle support section 33 of the axle support section 32 of pump casing 24 and divider 26.Stationary axle 34 keeps not rotating by the anti-swivel plate 36,37 that links to each other with its opposite ends.In between magnet 27 and compartment 26, be provided with gap (at interval), this gap is enough to keep magnet 27 not contact in the rotary course of rotor 28 with divider 26.
With the integrally formed impeller 21 of rotor 28 around stationary axle 34 rotations, and the liquid that is drawn in the pump chamber 25 by suction ports 22 applied centrifugal force, thereby liquid discharged from pump by discharging port 23.
Stator 30 is arranged in rotor 28 outsides with opposed facing relation, and divider 26 is clipped in therebetween.Stator 10 comprises the iron core of (the pawl utmost point) that has a plurality of claw-type poles and is arranged in circular coil 38 in the iron core by the insulation board (not shown).Stator 30 can be surperficial each other to contacting outwardly with divider 26.Adopt this claw-pole type stator 30, the magnetic field that produces by excitation circular coil 38 can be transferred to rotor 28 from claw-type pole with the efficient that increases.
Control circuit board 31 is located at the rear side of divider 26.In response to the signal that sends from position detector 39 as position-detection sensor, the magnetic field that circuit control panel 31 controls are produced by circular coil 38.Stator 30, control circuit board 31 and the divider 26 whole molding resins 40 that constitute by for example unsaturated polyester that scribble.
In the pump of structure as mentioned above, along with the magnetic field that produces by excitation circular coil 38 is transferred to magnet 27 from claw-type pole, magnet 27 is attracted and repels, thus with the integrally formed impeller 21 of rotor 28 can be around stationary axle 34 rotations.The rotation enlightenment pump action of impeller 21, thus liquid is sucked in the pump chamber 25 by suction ports 22, and pressurized in pump chamber 25.The liquid of pressurization radially is pumped circumferentially, and by discharging outside port 23 excavationg pumps.
Because in the 5th embodiment, the claw pole type motor with inner rotor core is coated with molding resin 40 fully, and the heat of the liquid that can come out with the heat of motor with from motor by molding resin 40 dissipates.But need not to use just cooling motor of extra cooling unit, this helps to improve electric efficiency and reduces motor size.
In addition, because in the present embodiment, except that pump casing 24, pump is coated with molding resin 40 fully, and molding resin 40 can protect whole motor part to comprise control circuit board 31, and increases its intensity.
In the 5th embodiment's pump, the internal pressure of pump chamber 25 increases along with the rotation of impeller 21.This internal pressure acts on divider 26.By adopting wherein stator 30 and divider 26 surfaces to contacting structure outwardly, stator 30 can stand and reduce the pressure that is applied to divider 26.Therefore, in the pump of present embodiment, can increase the internal hydraulic pressure of pump, and divider 26 is thickened.In addition, because the thickness of divider 26 can be thinner, can reduce the cost of material of the pump in the present embodiment.
In the 5th embodiment's pump, stator 30 can by with second embodiment in the same dust core form.In addition, the 5th embodiment's pump can be a kind of like this structure, that is, wherein stator 30 is made of dust core, but molding resin of no use 40 applies.
Though the present invention illustrates and describes with regard to some embodiments, it will be understood by those skilled in the art that under the prerequisite that does not depart from the scope of the invention defined by the following claims, can carry out various modifications and variations.

Claims (7)

1. pump comprises:
Be used to aspirate impeller with drain;
Pump casing, it has suction ports and discharges port, and liquid is sucked and discharges by this suction ports and discharge port;
Divider, it forms pump chamber with pump casing, and impeller rotatably is contained in this pump chamber;
Rotor, it has and is used for the magnet of drives impeller rotatably; And
Stator, it has the claw-type pole that is used for applying to rotor rotatable driving force, and described rotor and stator constitute claw pole type motor, and this claw pole type motor is used as the driving power source of pump,
Wherein described at least stator is coated with molding resin fully.
2. pump according to claim 1 is characterized in that described stator is made by dust core, and this dust core is molded as by the compression Magnaglo.
3. pump according to claim 1 is characterized in that described claw pole type motor has the external rotor type structure, wherein rotor arrangements in the divider outside and stator arrangement in the divider inboard.
4. pump according to claim 1 is characterized in that described claw pole type motor has the inner-rotor type structure, wherein rotor arrangements in the divider inboard and stator arrangement in the divider outside.
5. pump comprises:
Impeller is used for suction and drain;
Pump casing, it has suction ports and discharges port, and liquid is sucked and discharges by this suction ports and discharge port;
Divider, it forms pump chamber with pump casing, and impeller rotatably is contained in this pump chamber;
Rotor, it has and is used for the magnet of drives impeller rotatably; And
Stator, it has the claw-type pole that is used for applying to rotor rotatable driving force, and described stator and rotor constitute claw pole type motor, and this claw pole type motor is used as the driving power source of pump,
Wherein said stator is made by dust core, and this dust core is molded as by the compression Magnaglo.
6. pump according to claim 5 is characterized in that described claw pole type motor has the external rotor type structure, wherein rotor arrangements in the divider outside and stator arrangement in the divider inboard.
7. pump according to claim 5 is characterized in that described claw pole type motor has the inner-rotor type structure, wherein rotor arrangements in the divider inboard and stator arrangement in the divider outside.
CNA2008101656296A 2007-09-20 2008-09-19 Pump Pending CN101392753A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007243789A JP2009074433A (en) 2007-09-20 2007-09-20 Pump
JP243789/2007 2007-09-20

Publications (1)

Publication Number Publication Date
CN101392753A true CN101392753A (en) 2009-03-25

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Country Link
US (1) US20090081059A1 (en)
EP (1) EP2039938A2 (en)
JP (1) JP2009074433A (en)
KR (1) KR20090031303A (en)
CN (1) CN101392753A (en)
TW (1) TW200928117A (en)

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CN102769364A (en) * 2011-05-02 2012-11-07 克朗斯股份公司 Device for moving a fluid
CN102769364B (en) * 2011-05-02 2015-06-10 克朗斯股份公司 Device for moving a fluid
CN109906543A (en) * 2016-10-26 2019-06-18 日本电产三协株式会社 Motor
US11088587B2 (en) 2016-10-26 2021-08-10 Nidec Sankyo Corporation Motor
CN107620714A (en) * 2017-09-29 2018-01-23 广东威灵电机制造有限公司 Electronic water pump

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EP2039938A2 (en) 2009-03-25

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