Rotary electric machine and oil tank for a rotary electric machine
AssigneeWeg Equipamentos EléTricos S.A.
InventorsMarcelo Verardi, Thiago Schwinden Leal, Douglas Eyng Fritzen, Cassiano Antunes Cezario
Life of this patent
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Abstract
A rotary electric machine in which the casing containing the rotor/stator assembly comprises an intermediate closing cover that closes one end of the casing, a roller bearing immersed in oil and seated inside the oil tank of the machine, which has a casing with an outer wall that is spaced apart axially from the intermediate closing cover. The spacing between the outer wall and the intermediate closing cover forms a path for air to flow from a fan or a space to be filled with thermally insulating material.
Claims13
A rotary electric machine of the type that comprises a casing that delimits an internal volume that houses a rotor/stator assembly, disposed on a main axis of the machine;
- an oil tank, and a fan coupled on the main axis, comprising:
- an intermediate closing cover that closes one end of the casing, intermediate closing cover comprising a cavity through which the main axis of the machine passes;
- the oil tank comprising a casing having an outer wall and a roller bearing immersed in oil disposed internally to the outer wall of the oil tank casing for coupling the oil tank to the main axis of the machine;
- and
- the outer wall of the oil tank casing having a spacer protrusion configured to contact the intermediate closing cover to form a spacing between the outer wall of the oil tank casing and the intermediate closing cover;
- the spacing between the outer wall of the oil tank casing and the intermediate closing cover creating a flow path that allows the air flow from the fan to flow adjacently to an outer surface of the intermediate closing cover towards the main axis of the machine;
- wherein the cavity of the intermediate closing cover has a protruding edge and an inner face;
- and
- wherein the spacer protrusion of the outer wall of the oil tank casing is in the form of a circular wall with a circular shoulder, wherein the circular wall is configured to contact the protruding edge of the cavity and the circular shoulder is configured to fit against the inner face of the cavity.
A rotary electric machine of the type that comprises a casing that delimits an internal volume that houses a rotor/stator assembly, disposed on a main axis of the machine;
- an oil tank, and a fan coupled on the main axis, comprising:
- an intermediate closing cover that closes one end of the casing, intermediate closing cover comprising a cavity through which the main axis of the machine passes;
- the oil tank comprising a casing having an outer wall and a roller bearing immersed in oil disposed internally to the outer wall of the oil tank casing for coupling the oil tank to the main axis of the machine;
- the outer wall of the oil tank casing having a spacer protrusion configured to contact the intermediate closing cover to form a spacing between the outer wall of the oil tank casing and the intermediate closing cover;
- and
- a containment element being arranged at the spacing formed between the outer wall of the oil tank casing and the intermediate closing cover to delimit a space for receiving a thermally insulating material;
- wherein the cavity of the intermediate closing cover has a protruding edge and an inner face;
- and the spacer protrusion of the outer wall of the oil tank casing is in the form of a circular wall with a circular shoulder, wherein the circular wall is configured to contact the protruding edge of the cavity and the circular shoulder is configured to fit against the inner face of the cavity.
An oil tank for a rotary electric machine of the type that comprises a casing that delimits an internal volume that houses a rotor/stator assembly, disposed on a main axis of the machine;
- the oil tank, and a fan coupled on the main axis, comprising:
- a casing having an outer wall shaped with at least one spacer protrusion, the spacer protrusion configured to contact an intermediate closing cover of the casing of the electric machine to form a spacing between the outer wall of the oil tank casing and the intermediate closing cover;
- wherein the outer wall of the oil tank casing has at least one radial projection having a fastening hole for axial attachment to the intermediate closing cover;
- and the tank casing further comprises a cylindrical inner wall and a cylindrical outer wall concentric, the cylindrical inner wall being configured for installation of an inner immersed roller bearing.
Dependencies are inferred from the claim text.