Pumps – One fluid pumped by contact or entrainment with another – Contact or entrainment within rotary impeller
Patent
1988-02-01
1989-08-08
Smith, Leonard E.
Pumps
One fluid pumped by contact or entrainment with another
Contact or entrainment within rotary impeller
F04C 1900
Patent
active
048548243
ABSTRACT:
A two-staged vapor separating and metering fuel pump for an aircraft includes a housing (12) divided into a liquid ring section, a metering section and a motor section. Vapor-laden fuel enters the liquid ring section through a fuel inlet opening (14) and enters a liquid ring chamber (36) wherein vapor is separated from the fuel by the rotary action of a liquid ring impeller (44). The separated vapor is discharged from the housing through a vapor outlet opening (18). Vapor-free liquid from the liquid ring section is delivered to a metering chamber (86). The action of a metering rotor (72) in the metering chamber causes fuel to be discharged from the metering section at a flow rate proportional to the rotational speed of the metering rotor. The metering section discharges fuel from a pair or outlet ports (94) into a cavity (114) in the motor section. The motor section includes an armature (104) which is connected to a shaft (46) on which the metering and liquid ring impellers are mounted. Fuel discharged from the metering portion passes through the cavity cooling the components located in the motor section, and is discharged from the housing through a housing outlet opening (16). A sensor (116) mounted adjacent the liquid ring impeller generates signals representative of the rotational displacement of the shaft which are representative of the quantity of fuel discharged from the pump. The signals from the sensor are transmitted to a fuel control system of the aircraft which operates to adjust the rotational speed of the armature to deliver a desired amount of fuel at the outlet of the pump.
REFERENCES:
patent: 2850983 (1958-09-01), Adams
patent: 2952214 (1960-09-01), Adams
Jocke Ralph E.
Parker-Hannifin Corporation
Smith Leonard E.
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