Electric propulsion device

Patent metadata

Field	Value
Publication number	US-2025030318-A1
Application number	US-202218716486-A
Country	US
Kind code	A1
Filing date	Oct 17, 2022
Priority date	Jan 21, 2022
Publication date	Jan 23, 2025
Grant date	—

Abstract

An electric propulsion device includes a hollow shaft having a shaft flow path, which extends in a direction of an axis, formed therein, a boss portion having a space formed therein, a plurality of blades having a blade flow path, which communicates with the space of the boss portion, formed therein, an electric motor, and a casing having an accommodation space, which communicates with the shaft flow path, formed therein. A suction port is formed to communicate between an outside of the casing and the accommodation space, in a position of the casing between each of the plurality of blades and the electric motor. A blowing port is formed to communicate between the blade flow path and the outside, in a region including an end portion of each of the plurality of blades on an outer side in the radial direction.

First claim

1 - 9 . (canceled)

10 . An electric propulsion device comprising:
a hollow shaft extending along an axis and having a shaft flow path, extending in a direction of the axis, formed therein; a boss portion having a disc shape centered on the axis, attached to the hollow shaft on one side in the direction of the axis, and having a space formed therein; a plurality of blades extending from an outer circumferential surface of the boss portion in a radial direction, arranged at intervals in a circumferential direction, and having a blade flow path, communicating with the space of the boss portion, formed therein; an electric motor having a rotor core that is provided on an outer circumferential surface of the hollow shaft and a stator core that covers the rotor core from an outer circumferential side; and a casing having an accommodation space, accommodating the electric motor and communicating with the shaft flow path, formed therein, wherein a suction port is formed to communicate between an outside of the casing and the accommodation space, in a position between each of the plurality of blades and the electric motor in the casing, and a blowing port is formed to communicate between the blade flow path and the outside of the casing, in a region including an end portion of each of the plurality of blades on an outer side in the radial direction in the each of the plurality of blades, the suction port is open toward the one side in the direction of the axis to face each of the plurality of blades, and the blowing port is opened to blow air from the end portion of the each of the plurality of blades toward a rear edge.

11 . The electric propulsion device according to claim 10 , wherein the blowing port is formed on the shape of a blade surface of the each of the plurality of blades.

12 . The electric propulsion device according to claim 10 , wherein the blowing port is formed at an end edge on a trailing edge of the each of the plurality of blades.

13 . The electric propulsion device according to claim 10 , wherein the blowing port is open to blow out the air along a blade tip of the each of the plurality of blades.

14 . The electric propulsion device according to claim 10 , further comprising:
a pair of girders arranged at an interval in the direction of the axis inside the each of the plurality of blades, wherein an opening portion is formed in a girder located at a leading edge of the pair of girders, and is the suction port or the blowing port.

15 . The electric propulsion device according to claim 10 , further comprising:
a support body that is supported by the casing and that is inserted inside the shaft flow path; and a heater member that is provided in the support body.

16 . The electric propulsion device according to claim 15 , wherein
the support body has a cylindrical shape centered on the axis, and the heater member is attached to an inner circumferential surface of the support body.

17 . The electric propulsion device according to claim 15 , wherein
the support body has a cylindrical shape centered on the axis, and the heater member is attached to an outer circumferential surface of the support body.

18 . The electric propulsion device according to claim 15 , wherein
the support body has a rod shape centered on the axis, and the heater member is attached to an outer circumferential surface of the support body.

19 . The electric propulsion device according to claim 15 , wherein the support body and the heater member extend from an end portion of the hollow shaft on the other side in the direction of the axis to the space of the boss portion.

20 . The electric propulsion device according to claim 10 , further comprising:
a centrifugal fan fixed to a surface inside the boss portion facing the other side in the direction of the axis and be rotated integrally with the boss portion.

21 . The electric propulsion device according to claim 10 , further comprising:
an axial flow fan configured to be provided on an inner surface of the shaft flow path.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Morisaki Yuki
• Iwatani Junji
• Kitamura Tsuyoshi
• Imai Takehiko
• Aoki Yasutaka
• Yonemoto Satoshi
• Sakai Masayuki

Classifications

• B64D27/34

  All-electric aircraft · CPC title

• B64D35/021

  for electric power plants · CPC title

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title

• B64D35/026 Primary

  the electric power plant being integral with the propeller or rotor · CPC title

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title