|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F03C-002/00 F04C-014/18 F04C-014/00|
|미국특허분류(USC)||418/030; 418/001; 418/031; 418/152; 418/173; 384/103; 384/114|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 3 인용 특허 : 32|
Vane pump (10) mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring (70) is supported by a journal bearing (80). A relatively low sliding velocity is imposed between the cam ring and the vanes (26). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.
Having thus described the present invention, it is now claimed: 1. A variable displacement gas turbine fuel pump comprising: a housing having a pump chamber, and an inlet and outlet in fluid communication with the pump chamber; a rotor received in the pump chamber; a cam member surrounding the rotor and freely rotating relative to the housing; a cam sleeve radially interposed between the cam member and the housing; an actuator assembly operatively associated with the cam sleeve in the housing to selectively vary pump output; a spacer ring interposed bet...