JP2010011593A - Motor-integrated line pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the thickness of a motor-integrated line pump. <P>SOLUTION: In the motor-integrated line pump 1, a stator 5 is a claw pole stator having a circular core 10 having, in an inner circumferential surface, a plurality of claw magnetic poles 14, 15 disposed along the circumferential direction, and a winding wire 11 wound along the circumferential direction of the core 10 and disposed on the outer circumferential side of the claw magnetic poles 14, 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor-integrated line pump.

  A conventional motor-integrated line pump has a rotor with a magnet arranged around it and generates a magnetic force that rotates the rotor by a stator that surrounds the outer periphery of the rotor. An impeller is attached to the inside of the rotor. Then, the impeller rotates with the rotation of the rotor, so that the fluid flows in the central axis direction inside the rotor (for example, see Patent Document 1).

  In this case, the motor unit is configured by including a rotor and a stator, and the stator has an iron core that generates a magnetic force by energizing the windings. The impeller is rotated together with the rotor by attracting and repelling the magnetic force generated in the stator and the magnet of the rotor.

In such a conventional motor-integrated line pump, a laminated steel plate in which a plurality of thin steel plates are laminated on the iron core is used.
JP 2000-274386 A (FIG. 1)

  However, in the stator described in Patent Document 1, since the winding is wound so that the winding extends in the iron core axial direction (steel plate stacking direction), the winding is enlarged in the axial direction of the iron core. Therefore, there is a problem that the thickness of the stator is increased.

  Therefore, an object of the present invention is to reduce the thickness of a motor-integrated line pump.

  A first aspect of the present invention includes an annular stator, and a rotor that has an impeller that feeds fluid sucked from a suction port toward a discharge port, and is rotatably disposed inside the stator. In a motor-integrated line pump that rotates the rotor by a magnetic force generated by a stator, the stator includes an annular iron core having a plurality of claw magnetic poles arranged along a circumferential direction on an inner peripheral portion, and a periphery of the iron core. A claw pole type stator having a winding wound in a direction and disposed on the outer peripheral side of the claw magnetic pole.

  According to a second aspect of the present invention, in the motor-integrated line pump according to the first aspect, the rotor includes an annular rotor magnet in which the impeller is disposed and fixed to the impeller. And

  According to a third aspect of the present invention, in the motor-integrated line pump according to the second aspect, the rotor magnet is formed of a plastic magnet.

  According to a fourth aspect of the present invention, in the motor-integrated line pump of the second or third aspect, the rotor magnet and the impeller are integrally formed by a plastic magnet.

  According to a fifth aspect of the present invention, in the motor-integrated line pump according to the fourth aspect, a support shaft that penetrates the rotor in the axial direction of the rotor, and the impeller is rotatable with respect to the support shaft. And a bearing to be supported, and the bearing is insert-molded into the impeller when the rotor magnet and the impeller are integrally formed.

  According to a sixth aspect of the present invention, in the motor-integrated line pump according to any one of the first to fifth aspects, the iron core is configured with a dust core.

  According to a seventh aspect of the present invention, in the motor-integrated line pump according to any one of the first to fifth aspects, the iron core is made of a mixed material of magnetic powder and a resin binder. .

  According to an eighth aspect of the present invention, in the motor-integrated line pump according to any one of the first to fifth aspects, the iron core is made of metal glass.

  According to a ninth aspect of the present invention, in the motor-integrated line pump according to any one of the first to fifth aspects, the iron core is made of a silicon steel plate.

  According to a tenth aspect of the present invention, in the motor-integrated line pump according to any one of the first to ninth aspects, the iron core and the winding are integrally covered with a resin.

  According to the present invention, since the stator in the motor-integrated line pump is a claw pole type in which the winding is wound along the circumferential direction of the iron core, the winding is performed so that the winding extends in the core axis direction. Compared with the above-described conventional structure in which the wire is wound, the thickness of the winding in the direction of the core axis can be reduced, so that the stator can be made thinner, and the motor-integrated line pump can be made thinner. Can be planned.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 8 show a motor-integrated line pump according to an embodiment of the present invention, FIG. 1 is a side sectional view schematically showing the motor-integrated line pump, and FIG. 2 is a schematic view of the pump. 3 is a cross-sectional view taken along line III-III in FIG. 1, FIG. 4 is a perspective view showing the stator of the motor unit in detail, FIG. 5 is an exploded perspective view of the iron core of the stator, and FIG. Is a cross-sectional view of the iron core taken along the line VII-VII in FIG. 4, FIG. 7 is a cross-sectional view along the line VII-VII in FIG. 4, and FIG. 8 is a coupled state of the rotor and the impeller FIG.

  As shown in FIGS. 1 and 2, the motor-integrated line pump 1 of the present embodiment is configured by combining a motor unit 2 and a pump unit 3.

  As shown in FIGS. 1 to 3, the motor unit 2 includes an annular stator 5 and a rotor 4 that is rotatably disposed inside the stator 5, and the rotor is driven by the magnetic force generated by the stator 5. 4 is rotated. On the other hand, the pump unit 3 includes an impeller 6 that is provided integrally with the rotor 4 and forms a part of the rotor 4, and sends out the fluid sucked from the suction port 22 toward the discharge port 23 by the rotating impeller 6. It is like that.

  The stator 5 includes an annular iron core 10 having a plurality of first and second claw magnetic poles 14 and 15, which are a plurality of claw magnetic poles arranged along the circumferential direction, in the inner circumferential portion, and a circumferential direction of the iron core 10. And a winding 11 disposed on the outer peripheral side of the first and second claw magnetic poles 14 and 15. Therefore, the motor unit 2 provided with the stator 5 is a claw pole type motor. The stator 5 is disposed in a U-shaped cross section in an annular case 9 having a U-shaped cross section, and the inner periphery and both side surfaces thereof are covered by the case 9. Here, the case 9 houses the impeller 6 on the inner peripheral side and functions as a can.

  As shown in FIGS. 4 and 5, the iron core 10 is configured by combining a first divided body 12 and a second divided body 13 that are divided into two in the axial direction of the stator 5.

  Four first and second claw magnetic poles (claw poles) 14 and 15 are formed at equal intervals along the circumferential direction inside each of the first divided body 12 and the second divided body 13. The first claw magnetic pole 14 protrudes from the inner periphery of the first divided body 12 toward the second divided body 13, and the second claw magnetic pole 15 extends from the inner periphery of the second divided body 13 to the first divided body. Projecting toward 12.

  As shown in FIG. 5, the first divided body 12 includes an annular portion 16 disposed on the outer peripheral side, a top portion 17 extending from the edge of the annular portion 16 to the inner peripheral side, and an inner portion of the top portion 17. The above-described first claw magnetic pole 14 extending along the axial direction of the iron core 10 from the peripheral edge is integrally formed. Further, the second divided body 13 is formed to have a symmetrical shape with the first divided body 12, and the annular portion 18, the top portion 19, and the above-described second claw magnetic pole 15 are integrally formed. .

  Then, when the iron core 10 is configured by combining the first divided body 12 and the second divided body 13, as shown in FIG. 6, the first claw magnetic poles 14 and the second claw magnetic poles 15 are alternately arranged in an annular shape. Will be placed. And the coil | winding 11 is arrange | positioned between the inner periphery of the annular parts 16 and 18 and the outer periphery of the 1st, 2nd claw magnetic poles 14 and 15 arrange | positioned cyclically | annularly. Accordingly, the winding 11 is wound around the outer periphery of the first and second claw magnetic poles 14 and 15.

  Further, the iron core 10 (first and second divided bodies 12, 13) is formed of a dust core formed by compressing magnetic powder. The dust core has a structure in which the surface of each iron powder is coated with an inorganic insulating film and the particles are bound with a resin, which has the advantage of low iron loss (eddy current loss) at high frequencies. .

  In the motor-integrated line pump 1 of this embodiment, as shown in FIGS. 1 and 3, the iron core 10 and the annular winding 11 are integrally covered with a resin 24 that is molded. Specifically, when molding the resin 24, after the annular winding 11 is assembled to the first and second divided bodies 12 and 13 constituting the iron core 10, the inner periphery of the iron core 10 including the winding 11 is assembled. The side and both side surfaces are covered with a case 9, and the outer peripheral side thereof is covered with a case (not shown) so as to be continuous with the case 9, and molten resin 24 is poured into the case 9 and the form. Then, by removing the mold after the resin 24 is cured, the stator 5 integrated with the iron core 10 and the windings 11 embedded in the resin 24 integrated with the case 9 can be obtained. it can. For example, unsaturated resin is preferably used as the resin 24. In FIGS. 2 and 3, reference numeral 24a denotes a mounting hole.

  The rotor 4 includes an impeller 6 and an annular (tubular) rotor magnet 4 a in which the impeller 6 is disposed and fixed to the impeller 6. The rotor 4 is rotatably connected to a support shaft 7 disposed on the central axis of the rotor 4 by a bearing 21. The support shaft 7 is a fixed shaft by fixing both ends thereof to the pair of boss portions 8. The boss 8 is coupled to the case 9 via radially extending arms 8a.

  As shown in FIG. 3, the impeller 6 includes a plurality of blades 6a arranged radially at equal intervals. As shown in FIG. 1, the outer periphery of the blades 6a is coupled to the inner periphery of the rotor magnet 4a. In addition, the inner peripheral portion is coupled to the annular portion 20. The impeller 6 is supported by the support shaft 7 via the bearing 21 by fitting the bearing 21 press-fitted and fixed to the inner periphery of the annular portion 20 to the outer periphery of the support shaft 7 so as to be relatively rotatable. And rotate integrally with the rotor magnet 4a.

  As the impeller 6 rotates in this manner, the fluid flows through the inner side of the rotor magnet 4 a from the suction port 22 to the discharge port 23.

  The rotor magnet 4a is magnetized so that N and S poles are alternately arranged in the circumferential direction on the outer peripheral portion. The rotor magnet 4a is composed of a plastic magnet. Further, when the rotor magnet 4a is configured with a plastic magnet in this way, as shown in FIG. 8, the rotor magnet 4a and the impeller 6 are integrally formed with the plastic magnet.

  In such a configuration, the energization of the winding 11 is controlled, so that the rotor 4 is rotationally driven by the magnetic force generated by the stator 5, whereby the impeller 6 is rotated and the case 9 is rotated from the suction port 22. The fluid sucked into the inner peripheral side passes through the inner peripheral side of the case 9 and is discharged from the discharge port 23.

  In the present embodiment described above, since the stator 5 is a claw pole type stator in which the winding 11 is wound along the circumferential direction of the iron core 10, the winding is performed so that the winding extends in the iron core axial direction. Compared with the above-described conventional structure in which the winding is wound, the thickness of the winding 11 in the direction of the axis of the iron core 10 can be reduced, so that the stator 5 can be made thinner, and consequently the motor-integrated line pump 1. Can be made thinner. Further, in this case, in order to reduce the thickness of the motor-integrated line pump 1, it is not necessary to make the inner diameter of the stator 5 smaller than that of the conventional structure. A sufficient amount can be secured, and therefore the pump performance of the motor-integrated line pump 1 can be secured sufficiently.

  In the present embodiment, the rotor 4 has an annular rotor magnet 4a in which the impeller 6 is disposed and fixed to the impeller 6, so that the rotor 4 can have a relatively simple configuration. .

  In this embodiment, since the rotor magnet 4a is made of a plastic magnet, the rotor magnet 4a can be manufactured at low cost and light weight, thereby achieving weight reduction and cost reduction of the motor-integrated line pump 1.

  In this embodiment, since the rotor magnet 4a and the impeller 6 are integrally formed of plastic magnets, the rotor magnet 4a and the impeller 6 can be manufactured at low cost and light weight, and the number of components can be reduced and the motor can be reduced. The body line pump 1 can be easily assembled.

  Moreover, in this embodiment, since the iron core 10 was comprised with the dust core, the eddy current loss at the time of supplying with electricity to the coil | winding 11 becomes low, and the output efficiency of the motor part 2 can be improved.

  Further, since the iron core 10 and the winding 11 are integrally covered with the resin 24, the water resistance of the stator 5 can be improved, and the strength and noise reduction of the motor-integrated line pump 1 can be achieved.

  Next, another embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view showing a coupled state of a rotor, an impeller, and a bearing according to another embodiment of the present invention. In addition, the same part as the said embodiment is shown with the same code | symbol, and abbreviate | omits description.

  In the above embodiment, as shown in FIG. 8, the case where the rotor magnet 4 a and the impeller 6 are integrally formed has been described. However, in this embodiment, the bearing that supports the impeller 6 rotatably with respect to the support shaft 7. 21 is insert-molded into the impeller 6 when the rotor magnet 4a and the impeller 6 are integrally formed. Other configurations are the same as those in the above embodiment.

  According to this embodiment, since the bearing 21 is integrally formed with the impeller 6 and the rotor magnet 4a by insert molding, the positional accuracy of the rotor magnet 4a with respect to the support shaft 7 is improved while reducing the number of parts. it can. Therefore, the vibration can be reduced by improving the positional accuracy of the rotor magnet 4a, and the assembly of the motor-integrated line pump 1 can be facilitated.

  The present invention is not limited to the above-described embodiments, and various other embodiments can be adopted without departing from the gist of the present invention.

  For example, in each of the above-described embodiments, the case where the iron core 10 is formed of a dust core is disclosed. However, the iron core 10 is not limited to this, and a mixed material of magnetic powder and a resin binder, metal glass, silicon steel plate, or the like. Can be configured.

  Specifically, when it is composed of a mixed material of magnetic powder and resin binder, for example, it can be produced by injection molding using a mixed material in which iron powder, which is magnetic powder coated with insulation, and a resin binder are mixed. it can. In this case, the eddy current loss is suppressed more than in the case of the dust core, the output efficiency of the motor unit 2 can be further increased, and the manufacturing cost can be reduced at a low cost. In addition, as an example of the resin binder, nylon or PPS (polyphenylene sulfide) is preferable. This PPS is classified as a high heat-resistant super engineering plastic, is not violated by most acids, alkalis and organic solvents, and is excellent in strength, elastic modulus and fatigue characteristics.

  Further, when the iron core 10 is made of metal glass, the metal glass is a stable amorphous material like an oxide glass, and is a metal that easily deforms even at high temperatures. It is a material that is hard to crystallize by vitrification. The iron core 10 made of metal glass has an effect that the eddy current loss is suppressed more than the case of the dust core and the output efficiency and output torque of the motor are improved.

  Further, when the iron core 10 is composed of a silicon steel plate, the silicon steel plate is a ferromagnetic material, and a small pump with low power consumption (for example, about 3 W or less) can be manufactured, and material costs and processing costs can be reduced. And a low-cost motor-integrated line pump 1 can be provided.

It is a sectional side view showing roughly the pump concerning one embodiment of the present invention. It is a front view showing roughly the pump concerning one embodiment of the present invention. It is sectional drawing along the III-III line in FIG. It is a perspective view which shows in detail the stator of the motor part concerning one Embodiment of this invention. It is a disassembled perspective view of the iron core of the stator concerning one Embodiment of this invention. It is sectional drawing of the iron core cut in the position corresponding to the VII-VII line in FIG. It is sectional drawing along the VII-VII line in FIG. It is sectional drawing which shows the coupling | bonding state of the rotor and impeller concerning one Embodiment of this invention. It is sectional drawing which shows the coupling | bonding state of the rotor concerning other embodiment of this invention, an impeller, and a bearing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor integrated type line pump 4 Rotor 4a Rotor magnet 5 Stator 6 Impeller 7 Support shaft 10 Iron core 11 Winding 14 1st claw magnetic pole (magnetic pole)
15 Second claw magnetic pole (magnetic pole)
21 Bearing 24 Resin

Claims (10)

An annular stator, and a rotor having an impeller for feeding fluid sucked from the suction port toward the discharge port, and rotatably disposed inside the stator, and the rotor generated by the magnetic force generated by the stator In a motor-integrated line pump that rotates
An annular iron core having a plurality of claw magnetic poles arranged along the circumferential direction at the inner circumferential portion, and a winding wound around the circumferential direction of the iron core and arranged on the outer circumferential side of the claw magnetic poles And a claw pole type stator having a motor integrated line pump.   The motor-integrated line pump according to claim 1, wherein the rotor includes an annular rotor magnet in which the impeller is disposed and fixed to the impeller.   The motor-integrated line pump according to claim 2, wherein the rotor magnet is formed of a plastic magnet.   The motor-integrated line pump according to claim 2 or 3, wherein the rotor magnet and the impeller are integrally formed by a plastic magnet. A spindle that penetrates the rotor in the axial direction of the rotor;
A bearing that rotatably supports the impeller with respect to the support shaft;
With
The motor-integrated line pump according to claim 4, wherein the bearing is insert-molded in the impeller when the rotor magnet and the impeller are integrally formed.   The motor-integrated line pump according to any one of claims 1 to 5, wherein the iron core is composed of a dust core.   The motor-integrated line pump according to any one of claims 1 to 5, wherein the iron core is made of a mixed material of magnetic powder and a resin binder.   The motor-integrated line pump according to any one of claims 1 to 5, wherein the iron core is made of metal glass.   The motor-integrated line pump according to any one of claims 1 to 5, wherein the iron core is made of a silicon steel plate.   The motor-integrated line pump according to any one of claims 1 to 9, wherein the iron core and the winding are integrally covered with a resin.

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