INTERNAL GEAR PUMP

PROBLEM TO BE SOLVED: To provide an internal gear pump in which the occurrence of cavitation is suppressed by suppressing the increase of the loss of suction pressure into a gap between both rotors. SOLUTION: A cylindrical drum 4 is disposed in a casing body 1 having a suction port 10 and a discharg...

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Bibliographic Details
Main Authors WATANABE SHIGEHIRO, HADO MAKOTO
Format Patent
LanguageEnglish
Published 05.06.2008
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:PROBLEM TO BE SOLVED: To provide an internal gear pump in which the occurrence of cavitation is suppressed by suppressing the increase of the loss of suction pressure into a gap between both rotors. SOLUTION: A cylindrical drum 4 is disposed in a casing body 1 having a suction port 10 and a discharge port 17. The outer rotor 5 and the inner rotor 6 are stored in the drum 4. The outer rotor 5 is rotatably fitted into the hollow hole 54 of the drum 4. The inner rotor 6 is installed eccentrically to the outer rotor 5, internally engaged with the outer rotor 5, and rotatingly driven through a shaft 57. A port 7 is so formed in the drum 4 as to cover the both rotors 5, 6. A first suction hole 65 and a second suction hole 71 are formed to introduce a liquid from the vertical both end surfaces of the drum 4 into the drum. The first suction hole 65 is formed in a tapered one which is convergent toward the casing body 1. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20060310089