Stator support member of rotating electrical machine and method of manufacturing the same
A stator support member of a rotating electrical machine is provided with a cooling channel formed in the stator support member to cool a stator. The stator support member is manufactured to have the cooling channel of a hermetically sealed structure so that a cooling fluid may flow along the cooling channel. In particular, the support member having the cooling channel is divided into a ring-shaped outer part and a ring-shaped inner part (two-piece type) and the separately manufactured ring-shaped outer part and inner part are combined together.
1. A stator support member of a rotating electrical machine to support a stator formed of a plurality of segmented cores arranged in a ring shape, the stator support member comprising:
a ring-shaped outer part provided with a first cooling channel wall surface part formed on an inner circumferential surface thereof;
a ring-shaped inner part provided with a second cooling channel wall surface part formed on an outer circumferential surface thereof; and
a cooling channel surrounded with the first cooling channel wall surface part and the second cooling channel wall surface part by combining the ring-shaped outer part and the ring-shaped inner part together,
wherein one or more protrusions are formed on each of the first cooling channel wall surface part and the second cooling channel wall surface part, and
wherein:
the protrusions are formed in a shape of ribs extending in a circumferential surface direction of each of the first cooling channel wall surface part and the second cooling channel wall surface part without disconnection, and
the protrusions of the first cooling channel wall surface part and the second cooling channel wall surface part are configured to form an irregular cross section of the cooling channel and increase turbulence in a cooling fluid of the cooling channel.
2. A method of manufacturing a stator support member of a rotating electrical machine to support a stator formed of a plurality of segmented cores arranged in a ring shape, the method comprising:
forming a ring-shaped outer part provided with a first cooling channel wall surface part formed on an inner circumferential surface thereof, and a ring-shaped inner part provided with a second cooling channel wall surface part formed on an outer circumferential surface thereof; and
forming a cooling channel surrounded with the first cooling channel wall surface part and the second cooling channel wall surface part by combining the ring-shaped outer part and the ring-shaped inner part together,
wherein one or more protrusions are formed on each of the first cooling channel wall surface part and the second cooling channel wall surface part, and the protrusions are formed in a shape of ribs extending in a circumferential surface direction of each of the first cooling channel wall surface part and the second cooling channel wall surface part without disconnection, and
the protrusions of the first cooling channel wall surface part and the second cooling channel wall surface part are configured to form an irregular cross section of the cooling channel and increase turbulence in a cooling fluid of the cooling channel.
3. The method of claim 2 , wherein, first bonding surface parts are formed at both side ends of the first cooling channel wall surface part, second bonding surface parts are formed at both side ends of the second cooling channel wall surface part, and, in the forming of the cooling channel, the ring-shaped outer part and the ring-shaped inner part are fixed to each other by welding while the first bonding surface parts and the second bonding surface parts contact each other.
4. The method of claim 2 , wherein the ring-shaped outer part and the ring-shaped inner part are processed by forging.