Fluid-passage built-in type electric rotating machine

• US 20060066159A1
• Filed: 08/11/2005
• Published: 03/30/2006
• Est. Priority Date: 09/30/2004
• Status: Abandoned Application

• Current Assignee: Hitachi Industrial Equipment Systems Company Limited (Hitachi, Ltd.), Japan Servo Co., Ltd. (Nidec Corporation)
• Original Assignee: Hitachi Industrial Equipment Systems Company Limited (Hitachi, Ltd.), Japan Servo Co., Ltd. (Nidec Corporation)
• Inventors: Enomoto, Yuji, Masaki, Ryoso, Ishihara, Chio, Ohiwa, Shoji
• Application Number:
  US11/201,119
• Publication Number:
  US 20060066159A1
• Time in Patent Office: Days
• US Class Current: 310/54
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 3/325 for windings on salient poles, such as claw-shaped poles
• CPC Class Codes: H02K 5/18 with ribs or fins for improving heat transfer
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets

Abstract

A fluid-passage built-in type electrical rotating machine, which comprises a rotor fixed to a rotating shaft by means of a bearing; a stator in rotating relation to the rotor with a gap therebetween; a housing surrounding the stator; a pump turbine, fixed to one end of the rotating shaft, for circulating fluid in the electrical rotating machine; a first end bracket fixed to one end of the housing; and a second end bracket fixed to the other end of the housing. The first end bracket has a suction port for suctioning fluid into the electrical rotating machine, and the second end bracket has a discharging port for discharging fluid from the electrical rotating machine. The outer periphery of the stator and the inner face of the housing confines a first fluid flow passage extending along the axis of the rotating shaft, one end of the stator iron core and the first end bracket facing the one end of the stator confines a second fluid flow passage and the other end of the stator and the second end bracket confines a third fluid flow passage.

Claims

1. A fluid-passage built-in type electrical rotating machine, which comprises:

a rotor fixed to a rotating shaft by means of a bearing;

a stator in rotating relation to the rotor with a gap between the rotor and the stator;

a housing surrounding the stator;

a pump turbine, fixed to one end of the rotating shaft, for circulating or transporting fluid in the electrical rotating machine;

a primary end bracket fixed to one end of the housing; and

a secondary end bracket fixed to the other end of the housing;

wherein the primary end bracket has a suction port for suctioning fluid into the electrical rotating machine, and the secondary end bracket has a discharging port for discharging fluid from the electrical rotating machine,

wherein the outer periphery of the stator and the inner face of the housing confines a first fluid flow passage extending along the axis of the rotating shaft, one end of the stator iron core and the primary end bracket facing the one end of the stator confines a second fluid flow passage and the other end of the stator and the secondary end bracket confines a third fluid flow passage, and

wherein the suction port, the first fluid flow passage, the second fluid flow passage, the third fluid flow passage and the discharging port are communicated.

2. The fluid-passage built-in type electrical rotating machine according to claim 1, which further comprises a pump turbine built-in the third fluid flow passage.

3. The fluid-passage built-in type electrical rotating machine according to claim 1, which further comprises a heat dissipating loop connecting the suction port and the discharging port, wherein the heat dissipating loop contains a cooling medium that circulates through the first, second and third fluid flow passages in the electrical rotating machine.

4. The fluid-passage built-in type electrical rotating machine according to claim 1, wherein the stator is made of a sintered magnetic body or a compacted magnetic powder body.

5. The fluid-passage built-in type electrical rotating machine according to claim 1, wherein the stator iron core is assembly of segments equally divided along the first fluid flow passage of the stator iron core.

6. The fluid-passage built-in type electrical rotating machine according to claim 5, wherein the assembly of the segments is accommodated in a cylindrical housing.

7. The fluid-passage built-in type electrical rotating machine according to claim 1, wherein the electrical rotating machine is a motor.

8. The fluid-passage built-in type electrical rotating machine according to claim 1, wherein the electrical rotating machine is a generator.

9. The fluid-passage built-in type electrical rotating machine according to claim 1, wherein a single first fluid flow passage is formed in the stator.

10. A fluid-passage built-in type electrical rotating machine, which comprises:

a rotor fixed to a rotating shaft;

a stator, made of a sintered magnetic powder body or a compacted magnetic powder body, in rotating relation to the rotor with a gap therebetween;

a housing surrounding the stator;

a pump turbine, fixed to one end of the rotating shaft, for circulating fluid in the electrical rotating machine;

a primary end bracket fixed to one end of the housing; and

a secondary end bracket fixed to the other end of the housing;

wherein the primary end bracket has a suction port for suctioning fluid into the electrical rotating machine, and the secondary end bracket has a discharging port for discharging fluid from the electrical rotating machine,

wherein the outer periphery of the stator and the inner face of the confines a first fluid flow passage extending along the axis of the rotating shaft, one end of the stator iron core and the primary end bracket facing the one end of the stator confines a second fluid flow passage and the other end of the stator and the secondary end bracket confines a third fluid flow passage, and

wherein the suction port, the first fluid flow passage, the second fluid flow passage, the third fluid flow passage and the discharging port are communicated.

11. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein a seal groove is formed between the first fluid flow passage and the teeth portion, the seal groove being filled with a sealant or an O-ring.

12. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein the housing, a stator, a rotor rotatably supported on a rotating shaft, the first end bracket and the second end bracket are fastened by bolts and nuts, the bolts penetrating the end brackets, the stator to constitute the electrical rotating machine.

13. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein the stator iron core of the stator is a laminate of silicon-steel plates, the fluid being prevented from a contact with the laminate.

14. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein the first fluid flow passages are formed at positions corresponding to the winding grooves.

15. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein each of the fluid flow passages of a segment is formed in an equal distance along the circumference of the stator.

16. The fluid-passage built-in type electrical rotating machine according to claim 10, wherein the pump turbine is fixed to the shaft to be driven by the shaft.

17. A fluid-passage built-in type electrical rotating machine, which comprises:

a rotor fixed to a rotating shaft;

a stator in rotating relation to the rotor with a gap therebetween;

a pump turbine, fixed to one end of the rotating shaft, for circulating fluid in the electrical rotating machine;

a primary end bracket fixed to one end of the housing; and

a secondary end bracket fixed to the other end of the housing;

wherein the primary end bracket has a suction port for suctioning fluid into the electrical rotating machine, and the secondary end bracket has a discharging port for discharging fluid from the electrical rotating machine, and

wherein there are at least one fluid flow passage extending along the axis of the shaft, the flow passage being formed outside the gap between the rotor and the stator.

18. The fluid-passage built-in type electrical rotating machine according to claim 17, wherein the stator is made of a sintered magnetic powder body or a compacted magnetic powder body.

19. The fluid-passage built-in rotating machine according to claim 17, wherein the stator is divided into plural segments along the axis of the stator, the segments being assembled into the stator.

20. The fluid-passage built-in rotating machine according to claim 17, wherein the flow passage is formed between the outer periphery and the inner face of the housing.