Housing for a supercharger assembly
AssigneeGM Global Technology Operations LLC
InventorsGregory P. Prior, II, Roxann M. Bittner
Life of this patent
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Abstract
A housing for a supercharger assembly is provided having an inner wall at least partially defining a rotor cavity. A layer is formed from a sacrificial polymeric material and is provided on at least a portion of the inner wall. The layer is operable to provide approximately zero running clearance and improve scuff resistance between the first and second rotors and the inner wall. The sacrificial polymeric material is applied to the inner wall by insert molding to form the layer. A method of forming the housing is also provided.
Claims14
A supercharger housing apparatus defining a rotor cavity configured to receive first and second rotors, the housing apparatus comprising:
- a housing member having an inner wall at least partially defining the rotor cavity;
- and
- a layer formed from a sacrificial polymeric material provided on at least a portion of said inner wall and operable to provide approximately zero running clearance to thereby improve scuff resistance between the first and second rotors and said inner wall;
- wherein said housing member includes an outer wall opposite said inner wall and wherein at least one hole extends from said inner wall to said outer wall;
- and
- wherein said sacrificial polymeric material fills at least a portion of said at least one hole to form a key on said outer wall operable to retain said layer with respect to said inner wall.
A supercharger assembly comprising:
- a housing defining a rotor cavity and having an inner wall and an outer wall and includes at least one hole extending from said inner wall to said outer wall;
- wherein said inner wall defines said rotor cavity;
- first and second rotors rotatably disposed within said rotor cavity;
- a layer formed from a sacrificial polymeric material provided on at least a portion of said inner wall and operable to provide approximately zero running clearance to thereby improve scuff resistance between the first and second rotors and said inner wall;
- wherein said layer is formed by insert molding;
- wherein said sacrificial polymeric material fills at least a portion of said at least one hole to form a key on said outer wall operable to retain said layer with respect to said inner wall.
A method of forming a housing for a supercharger assembly having a rotor bore defined by an inner wall and configured to rotatably receive a first and second rotor, the method comprising:
- forming a layer of a sacrificial polymeric material on at least a portion of the inner wall by insert molding such that the running clearances between said first and second rotors and said inner wall is approximately zero;
- forming at least one hole within said housing member extending from said inner wall to an opposed outer wall;
- and
- allowing a portion of said sacrificial polymeric material to flow through said at least one hole during forming said layer to form a key having an integrally formed anchor member engaged with said outer wall operable to retain said key within said at least one hole, said key being operable to retain said layer with respect to said inner wall.
Dependencies are inferred from the claim text.