RAM air turbine driving a variable displacement hydraulic pump

Details RAM air turbine driving a variable displacement hydraulic pump RAM air turbine driving a variable displacement hydraulic pump

1990-06-18

1992-09-08

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

60447, 60452, F04B 1702, F04B 126

Patent

active

051453240

ABSTRACT:
An improved RAM air turbine (30) for the generation of emergency power on an airplane is disclosed. The RAM air turbine has an operational range in which reduced power is produced by a power controller (40) at speeds at which stalling of the RAM air turbine would occur under the control of a governor (16) which adjusts the pitch of the blades (12) of the turbine in combination with a pressure regulator (150) controlling the output of pressurized hydraulic fluid from a variable displacement hydraulic pump (19).

REFERENCES:
patent: Re31711 (1984-10-01), Horiuchi
patent: 2709449 (1955-05-01), Garr et al.
patent: 3125960 (1964-03-01), Chilman
patent: 3149678 (1964-09-01), Chilman et al.
patent: 3563675 (1971-02-01), Straznickas
patent: 4074955 (1978-02-01), Nonnemacher et al.
patent: 4158529 (1979-06-01), Nonnemacher et al.
patent: 4600364 (1986-07-01), Nakatani et al.
patent: 4655689 (1987-04-01), Westveer et al.
patent: 4680931 (1987-07-01), Jacobs
patent: 4711616 (1987-12-01), Tsukahara et al.
patent: 4717095 (1988-01-01), Cohen et al.
patent: 4742976 (1988-05-01), Cohen
"RAT has Hydraulic Pitch Change Servo", Oct. 1973 Issue of Hydraulics & Pneumatics, pp. 87-90.

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