CN-116547447-B - Electric supercharger

CN116547447BCN 116547447 BCN116547447 BCN 116547447BCN-116547447-B

Abstract

The electric supercharger (1) is provided with a motor (20), a stator housing (23) thermally connected to a stator (22), a motor case (25) accommodating the stator housing (23), and a diffuser plate (40) thermally connected to the stator (22). The stator housing (23) and the motor case (25) cooperate to form a first flow path (F1) that is disposed on the first end surface (22 a) side so as to surround the rotation axis (RL). The diffuser plate (40) has a second flow path (F2), and the second flow path (F2) is arranged on the second end surface (22 b) side so as to surround the rotation axis (RL) and is separated from the first flow path (F1) in the direction of the rotation axis (RL).

Inventors

Sakoda Koji
SASAKI HIROSHI
NAKAYAMA JUN

Assignees

株式会社IHI

Dates

Publication Date: 20260508
Application Date: 20220111
Priority Date: 20210210

Claims (7)

1. An electric supercharger, comprising: A motor having a stator arranged on a circumference with respect to a rotation axis; a first component thermally connected with respect to a first end face of the stator in a direction of the rotational axis; A second part thermally connected with respect to the second end face of the stator in the direction of the rotation axis, and A third member connected to the first member, The first member and the third member cooperate to form a first flow path disposed on the first end surface side so as to surround the rotation axis, The second member has a second flow path which is disposed on the second end surface side so as to surround the rotation axis and is separated from the first flow path in the direction of the rotation axis, The first component is a stator housing holding the stator, The second component is a diffuser plate, The stator housing has a housing main body accommodating the stator and a housing rib extending from an outer peripheral surface of the housing main body, The electric supercharger further includes a passage block disposed between the housing rib and the diffuser plate, the housing rib being partitioned by the housing main body, The passage block has a connecting passage that connects the first passage and the second passage to each other.
2. The electric supercharger according to claim 1, wherein, The third component is a motor housing that houses the stator housing.
3. The electric supercharger according to claim 1, wherein, The passage block further has an introduction flow path for guiding the heat medium from the outside to the second flow path, The connection flow path guides the heat medium from the second flow path to the first flow path.
4. The electric supercharger according to any one of claim 1 to 3, wherein, A second projected area of the second flow path, as viewed from the rotation axis, is different from a first projected area of the first flow path, as viewed from the rotation axis.
5. The electric supercharger according to any one of claim 1 to 3, wherein, A second projected area of the second flow path, as viewed from the rotation axis, is larger than a first projected area of the first flow path, as viewed from the rotation axis.
6. The electric supercharger according to any one of claim 1 to 3, wherein, The first flow path includes: an inner flow path portion surrounding the rotation axis; An outer flow path portion surrounding the rotation axis and offset with respect to the inner flow path portion in a direction of the rotation axis, and And an intermediate flow path portion provided between the inner flow path portion and the outer flow path portion and extending obliquely with respect to the direction of the rotation axis.
7. The electric supercharger of claim 6 wherein, The first flow path has: a flow path main body portion including the inner flow path portion, the intermediate flow path portion, and the outer flow path portion; a first auxiliary flow path part extending from one end of the flow path main body part in a direction crossing the rotation axis, and A second auxiliary flow path portion extending from the other end portion of the flow path body portion in a direction intersecting the rotation axis, A width from one end of the flow path body portion to the other end of the flow path body portion along the circumference of the rotation axis is smaller than a width from the first auxiliary flow path portion to the second auxiliary flow path portion.

Description

Electric supercharger Technical Field The present disclosure relates to an electric supercharger. Background The electric supercharger rotates the compressor impeller by a motor. The compressor wheel compresses air. The compressed air becomes high temperature. The motor that rotates the compressor wheel is the heat source. The temperature of the components constituting the electric supercharger increases due to the heat of the compressed air and the heat of the motor. The electric supercharger may not exhibit desired performance due to the temperature rise. Patent document 1 discloses a cooling structure for cooling a motor and a turbine. Patent document 2 discloses a cooling structure for cooling the back surface of a compressor impeller. Patent document 1 Japanese patent laid-open publication No. 2010-196478 Patent document 2 Japanese patent application laid-open No. 2017-150397 Further performance improvements to electric superchargers are desired. The improvement in the performance of the electric supercharger requires an improvement in the output of the motor. The motor is supplied with a large current to increase the output. When a large current is supplied to the motor, the motor is in a high-load state, and therefore the motor generates heat. When the temperature of the motor increases due to heat generation, the magnet constituting the motor is demagnetized. The output of the motor may be reduced due to demagnetization of the magnet. Therefore, it is necessary to further improve the cooling performance of the motor. Disclosure of Invention The present disclosure describes an electric supercharger capable of further improving cooling performance. An electric supercharger according to one embodiment of the present disclosure includes a motor having a stator disposed on a circumference with respect to a rotation axis, a first member thermally connected to a first end surface of the stator in a direction of the rotation axis, a second member thermally connected to a second end surface of the stator in a direction of the rotation axis, and a third member in contact with the first member. The first member and the third member cooperate to form a first flow path disposed on the first end surface side so as to surround the rotation axis. The second member has a second flow path which is arranged on the second end surface side so as to surround the rotation axis and is separated from the first flow path in the direction of the rotation axis. According to the electric supercharger of the present disclosure, the cooling performance can be further improved. Drawings Fig. 1 is a cross-sectional view schematically showing the structure of an electric supercharger of the present disclosure. Fig. 2 is an exploded perspective view showing an example of the electric supercharger. Fig. 3 is an exploded perspective view of fig. 2 viewed from another direction. Fig. 4 is an exploded perspective view showing an example of the electric supercharger. Fig. 5 is an exploded perspective view of fig. 4 viewed from another direction. Fig. 6 is a cross-sectional view schematically showing the relationship between the diffuser plate and the passage block. Fig. 7 is a diagram schematically showing an example of a flow path. Detailed Description An electric supercharger according to one embodiment of the present disclosure includes a motor having a stator disposed on a circumference with respect to a rotation axis, a first member thermally connected to a first end surface of the stator in a direction of the rotation axis, a second member thermally connected to a second end surface of the stator in a direction of the rotation axis, and a third member in contact with the first member. The first member and the third member cooperate to form a first flow path disposed on the first end surface side so as to surround the rotation axis. The second member has a second flow path which is arranged on the second end surface side so as to surround the rotation axis and is separated from the first flow path in the direction of the rotation axis. A current for generating a rotating magnetic field is supplied to a stator of the electric supercharger. The stator generates heat by the supplied current. The first component is thermally coupled to the first end face of the stator. The first member and the third member cooperatively form a first flow path. The electric supercharger can extract heat from the first end surface of the stator by supplying the heat medium to the first flow path. The second member is thermally coupled to the second end face of the stator. The second member has a second flow path. The electric supercharger can extract heat from the second end surface of the stator by supplying the heat medium to the second flow path. Thus, the electric supercharger can extract more heat from the stator. As a result, the electric supercharger can further improve the cooling performance. The second component may also be a diffuser plate. The