VANE PUMP DEVICE

A vane pump device includes: a rotor supporting 10 vanes movable in a rotation direction; and a cam ring having an inner circumferential surface facing an outer surface of the rotor. A fluid-suction step where transits to a fluid-discharge step by changing the pump chamber capacity in response to th...

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Bibliographic Details
Main Author TAGA, Naoya
Format Patent
LanguageEnglish
Published 07.04.2022
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS
WEAPONS
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Summary:A vane pump device includes: a rotor supporting 10 vanes movable in a rotation direction; and a cam ring having an inner circumferential surface facing an outer surface of the rotor. A fluid-suction step where transits to a fluid-discharge step by changing the pump chamber capacity in response to the rotation angle, as a result of the change in the distance from the rotation center to the inner circumferential surface of the cam ring in response to the rotation angle. A starting angle, at which the distance starts increasing after a same distance segment has reached a predetermined rotation angle, has a rotation angle difference of 2.5 degrees or less with respect to a center angle that equally divides a rotation angle at which a downstream-side end portion in the discharge port is formed and a rotation angle at which an upstream-side end portion in the suction port is formed.
Bibliography:Application Number: US202117551828