Rotary engine casing with seal engaging plate having mating surface defining a fluid cavity
AssigneePratt & Whitney Canada Corp.
InventorsBruno Villeneuve, Jean-Gabriel Gauvreau
Life of this patent
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Abstract
A rotary engine casing having at least one end wall of an internal cavity for a rotor including a seal-engaging plate sealingly engaging the peripheral wall to partially seal the internal cavity and a member mounted adjacent the seal-engaging plate outside of the internal cavity. The member and seal-engaging plate having abutting mating surfaces which cooperate to define between them at least one fluid cavity communicating with a source of liquid coolant. When the casing includes a plurality of rotor housings, the end wall may be between rotor housings. A method of manufacturing a rotary engine casing is also discussed.
Claims17
A rotary engine casing comprising first and second axially spaced apart end walls interconnected by a peripheral wall, the first end wall, second end wall and peripheral wall together enclosing an internal cavity configured to sealingly engage a rotor rotatable therein, at least the first end wall having a split configuration including a seal-engaging plate sealingly engaging the peripheral wall to partially seal the internal cavity and a member mounted adjacent the seal-engaging plate outside of the internal cavity, the seal-engaging plate having a sliding surface facing away from the member and defining a surface of the internal cavity, and a mating surface abutted to a mating surface of the member, at least one fluid cavity being located between the mating surfaces of the member and of the seal-engaging plate, the at least fluid cavity communicating with a source of liquid coolant, the at least one fluid cavity configured to in use cool the rotor.
A rotary engine casing comprising:
- a plurality of axially spaced end walls;
- two end-casing sections located at opposite ends of the rotary engine casing and each including a respective one of the end walls;
- and
- a central-casing section mounted between the two end-casing sections, the central-casing section comprising:
- a plurality of rotor housings each including a peripheral wall of a respective internal cavity for receiving a respective rotor, each peripheral wall cooperating with two of the end walls to enclose the respective internal cavity;
- and
- an intermediate section mounted between each adjacent ones of the rotor housings, each intermediate section including a first seal-engaging plate sealingly engaging the peripheral wall of a first of the adjacent ones of the rotor housings to partially seal the internal cavity thereof, a second seal-engaging plate sealingly engaging the peripheral wall of a second of the adjacent ones of the rotor housings to partially seal the internal cavity thereof, and an intermediate member mounted between the first and second seal-engaging plates, the intermediate member and first seal-engaging plate having abutting first mating surfaces cooperating to define between them at least one first fluid cavity communicating with a source of liquid coolant, the intermediate member and second seal-engaging plate having abutting second mating surfaces cooperating to define between them at least one second fluid cavity communicating with the source of liquid coolant.
A rotary engine casing comprising first and second axially spaced apart end walls interconnected by a peripheral wall, the first end wall, second end wall and peripheral wall together enclosing an internal cavity configured to sealingly engage a rotor rotatable therein, at least the first end wall including a seal-engaging plate sealingly engaging the peripheral wall to partially seal the internal cavity and a member mounted adjacent the seal-engaging plate outside of the internal cavity, the member and seal-engaging plate having abutting mating surfaces, the mating surfaces cooperating to define between them at least one fluid cavity communicating with a source of liquid coolant, the at least one fluid cavity configured to in use cool the rotor, the member having a thickness greater than a thickness of the seal-engaging plate.
Dependencies are inferred from the claim text.