Fluid transfer apparatus

Patent metadata

Field	Value
Publication number	US-12158149-B2
Application number	US-201917427440-A
Country	US
Kind code	B2
Filing date	Oct 4, 2019
Priority date	Feb 1, 2019
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

The present invention provides a fluid transfer apparatus comprising: a rotating shaft comprising a rotation unit extending along an axial direction and a first eccentric unit and a second eccentric unit disposed to be spaced apart from each other along the axial direction; a first rotor housing forming a first fluid compression space in the shape of an epitrochoid curved surface; a second rotor housing forming a second fluid compression space in the shape of an epitrochoid curved surface, and positioned to be spaced apart from the first rotor housing along the axial direction; a first rotor disposed in the first fluid compression space so as to delimit the first fluid compression space into multiple variable-displacement spaces, and coupled to the first eccentric unit while surrounding the first eccentric unit in the radial direction of the first eccentric unit; and a second rotor disposed in the second fluid compression space so as to delimit the second fluid compression space into multiple variable-displacement spaces, and coupled to the second eccentric unit while surrounding the second eccentric unit in the radial direction of the second eccentric unit.

First claim

The invention claimed is:

1. A fluid transfer apparatus comprising:
a rotating shaft having a rotation unit extending in an axial direction, and a first eccentric unit and a second eccentric unit disposed to be spaced apart from each other along the axial direction;
a first rotor housing defining a first fluid compression space having an epitrochoid shape;
a second rotor housing defining a second fluid compression space having an epitrochoid shape, and disposed to be spaced apart from the first rotor housing in the axial direction;
a first rotor disposed in the first fluid compression space so as to divide the first fluid compression space into a plurality of variable-volume spaces, and coupled to the first eccentric unit while surrounding the first eccentric unit in a radial direction of the first eccentric unit;
a first rotor housing cover configured to cover the first fluid compression space and disposed at one side of the first rotor housing;
a second rotor disposed in the second fluid compression space so as to divide the second fluid compression space into a plurality of variable-volume spaces, and coupled to the second eccentric unit while surrounding the second eccentric unit in a radial direction of the second eccentric unit;
a second rotor housing cover configured to cover the first fluid compression space and fluid communication space and disposed between the first rotor housing and the second rotor housing; and
a third rotor housing cover configured to cover the second fluid compression space, and disposed at an opposite side of the second rotor housing cover with respect to the second rotor housing,
wherein fluid accommodated in the first fluid compression space is transferred to the second fluid compression space or vice versa according to a rotating direction of the rotating shaft,
wherein the first eccentric unit and the second eccentric unit are disposed to have an angle of 90° with respect to the rotation unit,
wherein the first rotor housing and the second rotor housing are disposed to have an angle of 90° with respect to the rotation unit, and
wherein the first rotor housing cover, the second rotor housing cover, and the third rotor housing cover each comprises:
a rotating shaft through hole formed in the axial direction through a center of a plate defining the first rotor housing cover, the second rotor housing cover, and the third rotor housing cover to accommodate the rotation unit; and
two channels formed symmetrically to each other with respect to the rotating shaft through hole and allowing fluid to pass therethrough in the axial direction,
wherein, when the rotating shaft through holes are located at a center of quadrants in a direction of viewing the rotating shaft from one end to another end, one of the two channels of the first rotor housing cover is located on a second quadrant and another one is located on a fourth quadrant,
one of the two channels of the second rotor housing cover is located on a first quadrant and another one is located on a third quadrant, and

one of the two channels of the third rotor housing cover is located on the fourth quadrant and another one is located on the second quadrant.

2. The fluid transfer apparatus of claim 1 , wherein the second rotor housing cover has a first surface facing the first rotor and a second surface facing the second rotor,
wherein one of the two channels of the second rotor housing cover corresponds to a first channel and another one corresponds to a second channel,
wherein a shape of the first channel exposed to the first surface and a shape of the first channel exposed to the second surface are symmetric to each other with respect to a straight line corresponding to y=x on the first, second, third and fourth quadrants, and
wherein a shape of the second channel exposed to the first surface and a shape of the second channel exposed to the second surface are symmetric to each other with respect to a straight line corresponding to y=x on the first, second, third and fourth quadrants.

3. A fluid transfer apparatus comprising:
a rotating shaft having a rotation unit extending in an axial direction, and a first eccentric unit and a second eccentric unit disposed to be spaced apart from each other along the axial direction;
a first rotor housing defining a first fluid compression space having an epitrochoid shape;
a second rotor housing defining a second fluid compression space having an epitrochoid shape, and disposed to be spaced apart from the first rotor housing in the axial direction;
a first rotor disposed in the first fluid compression space so as to divide the first fluid compression space into a plurality of variable-volume spaces, and coupled to the first eccentric unit while surrounding the first eccentric unit in a radial direction of the first eccentric unit;
a first rotor housing cover configured to cover the first fluid compression space and disposed at one side of the first rotor housing;
a second rotor disposed in the second fluid compression space so as to divide the second fluid compression space into a plurality of variable-volume spaces, and coupled to the second eccentric unit while surrounding the second eccentric unit in a radial direction of the second eccentric unit;
a second rotor housing cover configured to cover the first fluid compression space and fluid communication space and disposed between the first rotor housing and the second rotor housing; and
a third rotor housing cover configured to cover the second fluid compression space, and disposed at an opposite side of the second rotor housing cover with respect to the second rotor housing,
wherein fluid accommodated in the first fluid compression space is transferred to the second fluid compression space or vice versa according to a rotating direction of the rotating shaft,
wherein the first eccentric unit and the second eccentric unit are disposed to have an angle of 90° with respect to the rotation unit,
wherein the first rotor housing and the second rotor housing are disposed to have an angle of 90° with respect to the rotation unit,
wherein the first rotor firstly compresses fluid flowing into the first fluid compression space and the second rotor secondarily compresses the fluid flowing into the second fluid compression space from the first fluid compression space, while the rotating shaft rotates in a first direction,
wherein the second rotor firstly compresses fluid flowing into the second fluid compression space and the first rotor secondarily compresses the fluid flowing into the first fluid compression space from the second fluid compression space, while the rotating shaft rotates in a second direction opposite to the first direction,
wherein the first eccentric unit rotates eccentrically ahead of the second eccentric unit by 90° while the rotating shaft rotates in the first direction, and wherein the second eccentric unit rotates eccentrically ahead of the first eccentric unit by 90° while the rotating shaft rotates in the second direction.

4. A fluid transfer apparatus comprising:
a rotating shaft having a rotation unit extending in an axial direction, and a first eccentric unit and a second eccentric unit disposed to be spaced apart from each other along the axial direction;
a first rotor housing defining a first fluid compression space having an epitrochoid shape;
a second rotor housing defining a second fluid compression space having an epitrochoid shape, and disposed to be spaced apart from the first rotor housing in the axial direction;
a first rotor disposed in the first fluid compression space so as to divide the first fluid compression space into a plurality of variable-volume spaces, and coupled to the first eccentric unit while surrounding the first eccentric unit in a radial direction of the first eccentric unit;

Assignees

• Korea Atomic Energy Res

Inventors

• Koh Yongkwon
• Kwon Jangsoon
• Jang Kijong

Classifications

• F04C15/00

  Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00 (of pumps specially adapted for elastic fluids F04C18/00 - F04C29/00) · CPC title

• F04C15/0049

  Equalization of pressure pulses (silencing for compressors F04C29/06) · CPC title

• F01C21/108

  with an axial surface, e.g. side plates · CPC title

• F04C2240/603

  with internal channels for fluid distribution, e.g. hollow shaft · CPC title

• F05B2240/20

  Rotors · CPC title