Method of manufacturing a rotary engine casing
AssigneePratt & Whitney Canada Corp.
InventorsBruno Villeneuve, Jean-Gabriel Gauvreau
Life of this patent
Estimating the term…
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.
Claims6
A method of manufacturing a rotary engine casing, the method comprising:
- manufacturing two end-casing sections including a first part of a fluid path for circulating a cooling fluid;
- manufacturing a central-casing section defining at least one internal cavity for receiving a rotor and a second part of the fluid path;
- wherein at least one of the manufacturing of the two end-casing sections and of the manufacturing of the central-casing section includes:
- manufacturing a member having a first mating surface,
- manufacturing a seal-engaging plate having a second mating surface, wherein the seal-engaging plate is manufactured with a thickness less than that of the member, and
- machining at least one surface depression on at least one of the first and second mating surfaces, the at least one surface depression in fluid communication with the fluid path;
- and
- assembling the central-casing section between the two end-casing sections, including connecting the first and second parts of the fluid path, and assembling the member with the seal-engaging plate by abutting the first and second mating surfaces such that the at least one surface depression defines a fluid cavity in communication with the fluid path for circulating a cooling fluid therein.
A method of manufacturing a rotary engine casing, the method comprising:
- manufacturing two end-casing sections;
- manufacturing a central-casing section defining at least one internal cavity for receiving a rotor;
- wherein at least one of the manufacturing of the two end-casing sections and of the manufacturing of the central-casing section includes:
- machining at least one surface depression in a mating surface of at least one of the seal-engaging plate, an end-casing member and an intermediate member;
- and
- assembling the seal-engaging plate to the end-casing member or the intermediate member, the end-casing member or the intermediate member being thicker than the seal-engaging plate, the seal-engaging plate and the end-casing member or the intermediate member defining therebetween a fluid cavity;
- and
- assembling the central-casing section between the two end-casing sections.
Dependencies are inferred from the claim text.