Uniform contained cooling for stator
AssigneeCaterpillar Inc.
InventorsJonathan Baumann, Perry Cruce
Life of this patent
Estimating the term…
Abstract
A liquid-cooled stator and rotor assembly for use as an electric motor or generator includes a housing having a first end bell, a second end bell, and at least one fluid orifice in the first end bell. A stator is fixed within a stator cavity of the housing. The stator includes a stator core and a plurality of windings for conducting a flow of electricity. A rotor for magnetically interacting with the stator is also included, the rotor being rotatably mounted between the first end bell and the second end bell within a rotor cavity. A first sealing ring and a second sealing ring are provided to form a fluid seal against the respective end bells and against a portion of the stator such that a cooling fluid entering the stator cavity via the orifice does not enter the rotor cavity.
Claims17
A liquid-cooled stator and rotor assembly for use as an electric motor or generator, the liquid-cooled stator and rotor assembly comprising:
- a housing having a first end bell, a second end bell, and at least one fluid orifice in the first end bell;
- a stator fixed within a stator cavity of the housing, the stator including a stator core and a plurality of windings for conducting a flow of electricity;
- a rotor for magnetically interacting with the stator, the rotor being rotatably mounted between the first end bell and the second end bell, and being positioned within a rotor cavity;
- and
- a first sealing ring adjacent the first end bell and a second sealing ring adjacent the second end bell, each sealing ring being adapted to form a fluid seal against the respective end bell and against a portion of the stator such that a cooling fluid entering the stator cavity via the at least one orifice does not substantially enter the rotor cavity.
An improved cooling electric motor comprising:
- a motor housing;
- a stator assembly within the motor housing, the stator assembly including a stator core and a plurality of windings;
- a rotor assembly in a rotor cavity surrounded by the stator assembly;
- first and second sealing rings, each sealing ring being positioned for sealing against the stator core and against the housing, thereby forming a stator cavity fluidly isolated from the rotor cavity;
- and
- one or more orifices into the stator cavity for flooding the stator cavity with a cooling fluid.
Dependencies are inferred from the claim text.