Title:
ASSEMBLY OF ROTARY PUMP
Document Type and Number:
Japanese Patent JPS5928081
Kind Code:
A
Abstract:
An improved pump assembly includes a plurality of pumping elements which rotate with a rotor and engage an inner surface of a cam ring to define pumping chambers which hold liquid and/or air. As the pumping chambers move along an inlet arc, liquid flows through an orifice to the chambers. The orifice restricts the rate of flow of liquid to the pumping chambers to a flow rate which is insufficient to fill the chambers with liquid during high speed rotation of the rotor. As the pumping chambers move along an outlet arc which has a constant slope toward the rotor, the volume of each pumping chamber is decreased. When the fluid pressure in the pumping chamber exceeds a pump discharge pressure, one of a series of a check valves opens and fluid is discharged from the pumping chamber. The check valves are resiliently deflectable spring fingers which are connected with an end plate of the pump assembly and are urged toward the closed position by a fluid pressure force which varies as a function of variations in pump discharge pressure. Bearings for supporting the rotor are lubricated by a flow of liquid from the pumping chambers through passages formed between the rotor and the end plates.
Inventors:
GIRUBAATO HENRII DORATSUCHIYAS
FUIRITSUPU BAATON SUPENSAA
FUIRITSUPU BAATON SUPENSAA
Application Number:
JP9221883A
Publication Date:
February 14, 1984
Filing Date:
May 25, 1983
Export Citation:
Assignee:
TRW INC
International Classes:
F04C2/344; F04C2/00; F04C2/34; F04C14/16; F04C14/24; F04C14/26; F04C15/00; F04C15/06; (IPC1-7): F04C2/344; F04C15/02
Attorney, Agent or Firm:
Hideto Asamura