Apparatus for cooling an electric rotating machine

Patent metadata

Field	Value
Publication number	US-10291104-B2
Application number	US-201514718546-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	Apr 3, 2015
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

An electric rotating machine that can raise the utilization efficiency of cooling oil is obtained. In an rotation axle, there are provided an oil flow path having a predetermined length from an end of the rotation axle and a flow path hole that communicates with the oil flow path and has an opening toward the inside of the electric rotating machine; a supporting member includes a cylinder section and a disk section that partitions the cylinder section in the axis direction, and a discharging hole is provided at an end of the cylinder section; between the flow path hole and the discharging hole, there is provided a partition plate that encloses a space formed by the supporting member and the rotation axle and guides cooling oil traveling from the flow path hole to the inside of the electric rotating machine to the discharging hole.

First claim

What is claimed is:

1. An electric rotating machine having a rotor including:
a rotation axle;
a rotor iron core that is situated at an outer circumference of the rotation axle and in which magnets are mounted; and
a supporting member that is disposed at an outer circumference of the rotation axle and couples and supports the rotor iron core with the rotation axle,
wherein in the rotation axle, there are provided an oil flow path having a predetermined length from an end of the rotation axle and a flow path hole that communicates with the oil flow path and has an opening toward the inside of the electric rotating machine,
wherein the supporting member includes a cylinder section and a disk section that partitions the cylinder section in the axis direction, and a discharging hole is provided at an end of the cylinder section,
wherein between the flow path hole and the discharging hole, there is provided a partition member that encloses a space formed by the supporting member and the rotation axle, said partition member and supporting member defining a cooling oil path guiding cooling oil from the flow path hole to the inside of the electric rotating machine to the discharging hole, and
wherein one end of the partition member is mounted to the end of the cylinder section in which the discharging hole is provided.

2. The electric rotating machine according to claim 1 , wherein a magnet containing hole for containing the magnets is formed in the rotor iron core, and the cooling oil guided to the discharging hole passes through the magnet containing hole.

3. The electric rotating machine according to claim 1 , wherein one end of the partition member is screwed to the end, of the cylinder section, that is situated at the side of the discharging hole.

4. The electric rotating machine according to claim 1 , wherein one end of the partition member is welded to the end, of the cylinder section, that is situated at the side of the discharging hole.

5. The electric rotating machine according to claim 1 , wherein one end of the partition member is pressed into the end, of the cylinder section, that is situated at the side of the discharging hole.

6. The electric rotating machine according to claim 1 , wherein the partition member is produced with a sheet metal material.

7. The electric rotating machine according to claim 1 , wherein a plurality of holes are formed in the partition member.

8. The electric rotating machine according to claim 7 , wherein the holes are formed to pass through said partition in an axial direction of said rotation axle.

9. The electric rotating machine according to claim 7 , wherein the holes are formed in a portion of said partition that runs generally parallel to said disk section.

10. The electric rotating machine according to claim 7 , wherein each of said plurality of holes aligns with an exposed head of a respective bolt in an adjacent structure of the rotor.

11. The electric rotating machine according to claim 1 , wherein an inner radial end of said partition member is mounted spaced apart from the rotation axle.

12. The electric rotating machine according to claim 1 , an inner radial end of said partition member is mounted to the rotation axle so that there exists no gap for outflow of said cooling oil from the space formed by the supporting member, the partition member, and the rotation axle, other than through said discharging hole.

13. The electric rotating machine according to claim 1 , wherein said rotor iron core includes an internal flow path for carrying said cooling oil, said internal flow path including a first flow path portion extending radially from said discharging hole, and a second flow path portion extending in an axial direction of said rotor.

14. The electric rotating machine according to claim 13 , wherein said first flow path portion connects to one axial end of said second flow path portion.

Assignees

• Mitsubishi Electric Corp

Inventors

• Murakami Tadashi
• Sakata Yukitaka
• Kitta Yoshiaki
• Takagi Katsunari
• Ojima Koichi
• Inoue Masaya

Classifications

• H02K9/19 Primary

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title

• H02K9/193

  with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium · CPC title

• H02K5/20

  with channels or ducts for flow of cooling medium · CPC title

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title