Patent ID: 11867179
Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 22:
23. A fluid transfer apparatus, comprising:
a rotor housing defining a fluid compression space having an epitrochoid surface;
a rotor disposed in the fluid compression space of the rotor housing so as to divide the fluid compression space of the rotor housing into a plurality of volume variance spaces, and eccentrically coupled to a rotation shaft rotating in place so as to rotate eccentrically within the fluid compression space; and
a rotor housing cover formed to cover the fluid compression space of the rotor housing, and having a rotation shaft penetration hole formed through a center thereof, and a first cover channel and a second cover channel symmetrically formed on opposite sides to each other with respect to the rotation shaft penetration hole,
wherein the rotor housing cover is provided in plurality, disposed to be spaced apart from one another,
wherein the rotor housing is provided in plurality, each disposed between neighboring rotor housing covers thereof,
wherein the rotor is provided in plurality, disposed in the fluid compression spaces of the rotor housings, respectively,
wherein arrangement directions of the rotors are determined based on a direction that centers of the rotors face with respect to the rotation shaft, and each rotor is arranged to face a different direction from those of neighboring rotors thereof,
wherein arrangement directions of the rotor housings are determined based on a direction that the epitrochoid surface faces,
wherein the rotor housings are all arranged to face the same direction or arranged to have an angle of 90° with the neighboring rotor housings,
wherein the rotor housing is provided with housing channels formed at positions circumscribed to the epitrochoid surface,
wherein the housing channels are formed to communicate with the fluid compression space, extends in a direction parallel to the extending direction of the rotation shaft, and opens toward one of a rotor housing cover on one side thereof and a rotor housing cover on another side,
wherein the rotor is provided with a protrusion protruding from a surface facing the rotor housing cover, and
wherein the protrusion comprises:
a first protrusion formed along a circumference smaller than an edge of the surface facing the rotor housing cover; and
second protrusions protruding from vertices of the first protrusion toward vertices of the rotor.