JP2015226330A - Pump driving motor and pump device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly-reliable pump driving motor, and to provide a pump device using the same.SOLUTION: A pump driving motor comprises: a stator that has a stator iron core configured by laminating a plurality of electromagnetic steel plates each formed to have a substantially-circular outer diameter shape; and a rotor arranged at a center of the stator coaxially with the stator. In the pump driving motor, end surface insulators are arranged respectively on both end surfaces of the stator iron core, and coils are wound around outer peripheries of the end surface insulators. On one of the end surface insulators, a plurality of support walls on which a crossover for connecting between coils is trained are formed. A cylindrical-shaped motor housing is press-fitted or shrink-fitted on an outer periphery of the stator in a concentric manner, and a crossover insulator molded in a cylindrical shape by a resin is provided between the crossover trained on the support wall and an inner surface of the motor housing.

Description

  The present invention relates to a pump driving motor and a pump device using the same.

  A pump driving motor used in a pump device is desired to have a small size and high output.

  Conventionally, in order to obtain a compact and high output motor for a pump drive used in a pump device, a space distance between a charging part and a non-charging metal part has been ensured in the shortest time. In patent document 1, the electric motor provided with the support wall which gives a crossover over the end face is described.

Japanese Patent No. 4842647

  In recent years, there has been a demand for a pump driving motor used in a pump apparatus that is smaller and has a higher output, and the diameter and the number of windings to be used have been reduced to the maximum allowed.

  On the other hand, the spatial distance between the charging part and the non-charging metal part is a proposition, and it is necessary to use an insulator to ensure a safe and reliable pump drive motor and a pump device using it. is there. There is an insulating tape as an insulator. Insulating tape is easy to apply, but there is a risk of poor workability and easy peeling.

  An object of this invention is to provide a highly reliable pump drive motor and a pump apparatus using the same.

  In order to solve the above-described problems, the present invention provides a stator having a stator core in which a plurality of electromagnetic steel sheets each having an outer diameter shape formed into a substantially circular shape are laminated, and is coaxial with the stator at the center of the stator. In the pump drive motor having the rotor arranged as described above, end faces are disposed on both end faces of the stator core, and windings are wound around the end faces. In this case, a plurality of support walls are provided for connecting the connecting wires connecting the windings, and a cylindrical motor housing is concentrically fitted on the outer periphery of the stator by fitting or hot fitting. The connecting wire having the support wall and the inner surface of the motor housing is provided with a connecting wire formed in a cylindrical shape by resin molding.

  ADVANTAGE OF THE INVENTION According to this invention, a reliable pump drive motor and a pump apparatus using the same can be provided.

It is a longitudinal cross-sectional view of the pump apparatus which concerns on one Example of this invention. It is a top view of the conventional stator. It is sectional drawing of the conventional pump drive motor. It is a top view of the stator of the present invention. It is sectional drawing of the motor for pump drive of this invention. It is a top view of the crossover of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, an outline of the pump device 100 of the present invention will be described with reference to FIG.

  The pump device 100 includes a pump base 1 in which a water passage is formed, a pressure tank 2 placed on the discharge side water passage portion of the pump base 1, and a pump driving motor 3 disposed on the pump base 1. The control board 4 for controlling the pump device 100 by changing the rotation speed of the pump driving motor 3 and the control board 4 connected to the control board 4 through a communication line to switch the display of the discharge pressure value of the pump device 100 and the setting of the operation pressure, etc. A display substrate 5 that can be operated, a harmonic suppression coil 6 that suppresses harmonics generated when controlling the pump device disposed on the pump base 1, and an upper portion of the discharge base water passage portion of the pump base 1. And a pressure sensor 7 for detecting the pressure of the pump device, and the pump cover 10 covers them.

  In the present embodiment, a Wesco pump device that is a typical pump device is illustrated, but the present invention is not limited to a Wesco pump device.

  The pump device 100 is operated by operating the pump drive motor 3. By the operation of the pump driving motor 3, first, the self-priming operation is performed, and after the self-priming operation is completed, the pumping operation is started.

  In such a pumping operation, when the flow path connected to the discharge pipe is closed, the pressure on the downstream side from the discharge pipe increases. The pressure sensor 7 detects this pressure and the operation of the pump driving motor 3 is stopped.

  FIG. 2 is a plan view of a conventional stator 20 '. The stator core 21 has a plurality of teeth portions 22 for winding windings radially toward the center on the inner diameter side of the stator core 21, adjacent to each other. A winding gap 23 is formed between the teeth 22, and a portion surrounded by the plurality of teeth 22 at the center of the stator core 21 is circular, and the surrounded portion is a portion through which the rotor 31 passes. It is. The rotor 231 is arranged at the center of the stator 21 so as to be coaxial with the stator 21. The stator core 21 and the circular portion (enclosed portion) at the center of the stator core 21 are substantially concentric circles.

  On both end faces of the stator core 21, end faces 25 made of resin for insulation from the winding 24 are arranged. A winding 24 is wound from above the end face 25 (from the outer periphery). On one end face 25a, a plurality of support walls 27 are extended to run over the connecting wires 26 that connect the windings 24 to each other. A plurality of support walls 27 are formed. The plurality of support walls 27 are formed at intervals so as to form a substantially concentric cylinder with the stator core 21.

  FIG. 3 is a sectional view of a conventional pump driving motor 3 ′. The stator 20 is fitted into the outer peripheral side of the rotor core 21 by press fitting or hot fitting so that a cylindrical motor housing 30 is concentric. A rotor 31 is arranged at the center of the stator 20 so as to be coaxial with the stator 20. The rotor 31 is held by a bearing 32 and is rotatable.

  A gap between the connecting wire 26 with the support wall 27 of the end face 25a and the inner surface of the motor housing 30 has an allowable spatial distance δ between the charging part and the non-charging metal part. However, since there is a possibility that the spatial distance δ cannot be secured due to the diameter of the winding 24 and the work variation, the insulating tape 28 is pasted and insulated around the crossover wire 26. Affixing the insulating tape 28 is easy, but on the other hand, it has poor workability and is easy to peel off, and a method for easily and reliably fixing the insulating material is required to ensure further reliability.

  FIG. 4 is a plan view of the stator 20 of the present invention. The difference from the conventional stator 20 ′ of FIG. 2 is that a U-shaped groove 42 is provided on the outer periphery of the stator core 21. The other points are the same as those of the stator 20 ', and the same symbols have the same effects. The U-shaped groove 42 can be fitted with a projection 41 of a crossover 40 described later.

  FIG. 5 is a sectional view of the pump driving motor 3 of the present invention. The difference from the conventional pump drive motor 3 ′ of FIG. 3 is that a crossover wire break 40 is provided between the crossover wire 26 having the support wall 27 and the inner surface of the motor housing 30. The other points are the same as those of the pump drive motor 3, and the same symbols have the same effects. The crossover 26 can be covered by the crossover 40. The crossover 40 has an effect that the insulation with the motor housing 30 can be performed more reliably than the insulating tape 28.

  FIG. 6 is a plan view of the crossover 40. The crossover 40 is formed in a cylindrical shape by resin molding. On the outer periphery of the crossover wire 40, there are a plurality of protrusions 41 (two protrusions 41 in this embodiment) for fitting with the U-shaped groove 42 provided on the outer periphery of the stator core 21. A burr portion 43 is formed at the tip of the projection 41 to prevent it from being pulled out. The burr 43 is hooked between the magnetic steel sheets on which the stator core 21 is laminated, and plays a role of preventing the removal.

  By using the jumper wire 40 configured in a cylindrical shape by resin molding, the thickness of the winding diameter, workability, variations in component dimensions, peeling of the insulating tape 28 in the manufacturing process, etc. are eliminated, and the charging unit Therefore, it is possible to provide a highly reliable pump driving motor and a pump device using the same, in which the insulation between the non-charged metal parts is more reliable.

DESCRIPTION OF SYMBOLS 1 Pump base 2 Pressure tank 3, 3 'Pump drive motor 4 Control board 5 Display board 6 Harmonic suppression coil 7 Pressure sensor 10 Pump cover 20, 20' Stator 21 Stator core 22 Teeth part 23 Winding space part 24 Winding 25 End face edge 25a One end face edge 26 Crossover wire 27 Support wall 28 Insulating tape 30 Motor housing 31 Rotor 32 Bearing 40 Crossover wire end 42 U-shaped groove 41 Projection portion 43 Burl portion 100 Pump device δ Spatial distance

Claims (3)

A stator having a stator core in which a plurality of electromagnetic steel sheets having an outer diameter shape formed into a substantially circular shape are laminated;
A pump driving motor having a rotor arranged coaxially with the stator at the center of the stator,
The end face is disposed on both end faces of the stator core, and windings are wound around the outer periphery of the end face,
One end of the end face is formed with a plurality of support walls that stretch the connecting wire connecting the windings,
The outer periphery of the stator is press-fitted so as to be concentric with a cylindrical motor housing, or fitted by hot fitting,
A motor for driving a pump, characterized in that a connecting wire is formed in a cylindrical shape between the connecting wire with the support wall and the inner surface of the motor housing. The motor for driving a pump according to claim 1,
The stator core is provided with a plurality of U-shaped grooves between the outer periphery and the slot portion,
The crossover line has a protrusion that fits into the U-shaped groove of the stator core,
A pump driving motor characterized in that the protrusion has a burr portion for preventing it from coming off at the tip.   The pump base motor according to claim 1 or 2, wherein the pump base is formed on a pump base formed with a water passage, a pressure tank placed on an upper portion of a discharge side water passage portion of the pump base, and the pump base. And a control board for controlling the pump apparatus by changing the number of rotations of the pump driving motor, and switching between display of the discharge pressure value of the pump apparatus and setting of the operating pressure, etc. connected to the control board via a communication line A display substrate that can be operated, a harmonic suppression coil that is disposed on the pump base and suppresses harmonics generated when controlling the pump device, and is placed on the discharge side water passage portion of the pump base. A pressure sensor for detecting the pressure of the pump device, and the pump cover 10 covers them.