ROTARY MACHINE

• US 20130270931A1
• Filed: 04/22/2011
• Published: 10/17/2013
• Est. Priority Date: 12/22/2010
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Handa, Norihisa, Ohashi, Satoru, Tanida, Masahiro, Yamasaki, Shusaku
• Granted Patent: US 10,673,306 B2
• Time in Patent Office: Days
• US Class Current: 310/43
• CPC Class Codes: H02K 1/32 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/34 between conductors or between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 3/48 in slots
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: H02K 9/197 in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
• CPC Class Codes: H02K 9/223 Heat bridges

Abstract

A rotary machine capable of carrying out efficient cooling without increasing costs or deteriorating performance is provided. A motor 1 serving as the rotary machine has a rotor 20 configured to be rotatable around a rotary shaft 10, a stator 30 having a stator core 31 arranged around the rotor 20 and a coil 32 attached to the stator core 31 so that a coil end part 32a protrudes from each end of the stator core 31, mold members 33a and 33b formed at both ends of the stator core 31, to cover base parts of the coil end parts 32a, and partition parts 42b and 43b attached in contact with the mold members 33a and 33b, to separate a space S1 in which the rotor 20 is arranged from a space S2 in which the coil end parts 32a are arranged.

Claims

1. A rotary machine comprising:

a rotor rotatable around a center axis of a rotor shaft;

a stator having a stator core arranged around the rotor and a coil attached to the stator core so that a coil end part protrudes from each end of the stator core;

a mold member formed at each end of the stator core and configured to cover a base part of the coil end part; and

a partition member attached in contact with the mold member and configured to separate a first space with the rotor arranged therein from a second space with the coil end part arranged therein.

2. The rotary machine according to claim 1, further comprising a mold member formed inside the stator core and configured to fill a gap in a slot formed in the stator core to accommodate the coil.

3. The rotary machine according to claim 2, wherein

the mold member formed at each end of the stator core and the mold member formed inside the stator core are made of materials having different thermal conductivities, respectively.

4. The rotary machine according to claim 1, wherein

the mold member formed at a first end of the stator core and the mold member formed at a second end thereof are asymmetric in shape in an axial direction of the rotor shaft.

5. The rotary machine according to claim 4, wherein:

the mold member formed at the first end of the stator core has an annular shape along the end of the stator core; and

the mold member formed at the second end of the stator core has an annular part formed along the end of the stator core and a cylindrical protrusion protruding from the annular part toward the center axis of the rotor shaft.

6. The rotary machine according to claim 1, further comprising a coolant supply port configured to supply a coolant from the outside to the coil end part arranged in the second space.

7. The rotary machine according to claim 6, wherein

the coolant supply port is arranged at a plurality of locations in a rotation direction of the rotor above the coil end part.

8. The rotary machine according to claim 1, wherein

an end of the partition member is fitted to, attached to, brought in contact with, or engaged with the whole of an inner circumference of the mold member, thereby separating the first space from the second space.

9. The rotary machine according to claim 1, wherein

the rotor has a rotary body rotatable around the center axis of the rotor shaft and a sleeve member attached to an outer circumferential face of the rotary body,

a rotor core formed by laminating a plurality of magnetic steel sheets is attached to an outer circumferential face of the sleeve member, and

a recess serving as a coolant flow path for guiding a coolant is formed in at least one of the outer circumferential face of the rotary body and an inner circumferential face of the sleeve member.

10. The rotary machine according to claim 9, wherein

the rotary body has a first rotary body that has a first flow path for axially guiding the coolant and a second rotary body that has a larger diameter than the first rotary body and contains an internal second flow path to connect the first flow path to the coolant flow path and the recess is formed in an outer circumferential face of the second rotary body.

11. The rotary machine according to claim 9, wherein

the recess is formed in the same number as the number of permanent magnets arranged in the rotor.

12. The rotary machine according to claim 11, wherein

positions of the rotary body and sleeve member with respect to the rotor in a rotation direction of the rotor are set so that the recesses come closest to the permanent magnets, respectively.