Rotary-type fluid machine

• US 8,323,009 B2
• Filed: 01/23/2009
• Issued: 12/04/2012
• Est. Priority Date: 01/24/2008
• Status: Expired due to Fees

• Current Assignee: Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: Shimizu, Takashi, Shibamoto, Yoshitaka, Sotojima, Takazou, Masuda, Masanori
• Primary Examiner(s): Trieu, Theresa
• Application Number:
  US12/864,383
• Publication Number:
  US 20100296959A1
• Time in Patent Office: 1,411 Days
• Field of Search: 418/11, 418/15, 418/59, 418/60, 418/63, 418/94, 418/212, 418/248, 418/221, 417/313, 417/410.3
• US Class Current: 418/59
• CPC Class Codes: F04C 15/0042 Systems for the equilibration of forces acting on the machines or pump interstice adjustment other than by fluid pressure F01C21/102
• CPC Class Codes: F04C 18/045 having a C-shaped piston
• CPC Class Codes: F04C 18/32 having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
• CPC Class Codes: F04C 18/356 with vanes reciprocating with respect to the outer member
• CPC Class Codes: F04C 2250/00 Geometry
• CPC Class Codes: F04C 23/001 of similar working principle
• CPC Class Codes: F04C 23/008 Hermetic pumps

Abstract

A rotary-type fluid machine includes a compression mechanism having piston mechanisms arranged one on top of the other and a drive mechanism having a drive shaft that is configured and arranged to drive the piston mechanisms. Each of the two piston mechanisms includes a cylinder member with a cylinder chamber, a piston member housed eccentrically in the cylinder chamber such that the cylinder chamber is partitioned into first and second compression chambers. A phase difference of 90 degrees in volume change is made between the cylinder chambers of the two piston mechanisms. A movable one of the cylinder and piston has a first surface facing one of the first cylinder chambers and a second surface facing one of the second cylinder chambers, with a surface area of the first surface being equal to a surface area of the second surface.

Claims

1. A rotary-type fluid machine, comprising:

a compression mechanism including two eccentric-rotation type piston mechanisms arranged one on top of the other; and

a drive mechanism including a drive shaft that is configured and arranged to drive the two eccentric-rotation type piston mechanisms,

each of the two eccentric-rotation type piston mechanisms including

a cylinder member formed with a cylinder chamber,

a piston member housed eccentrically in the cylinder chamber such that the cylinder chamber is partitioned into a first cylinder chamber and a second cylinder chamber, and

a blade member partitioning each of the first cylinder chamber and the second cylinder chamber into a high-pressure side and a low-pressure side, with

one of the cylinder member and the piston member being formed as a fixed member and the other being formed as a moving member configured to make eccentric rotational motion relative to the fixed member, and

the moving member, the fixed member and the blade being configured and arranged such that as the moving member makes the eccentric rotational motion, a phase difference of 180 degrees in volume change is made between the first cylinder chamber and the second cylinder chamber,

the moving members, the fixed members and the blades being further configured and arranged such that a phase difference of 90 degrees in volume change is made between the cylinder chambers of the two eccentric-rotation type piston mechanisms, and

each of the two moving members having a first surface facing one of the first cylinder chambers and a second surface facing one of the second cylinder chambers, with a surface area of the first surface being equal to a surface area of the second surface.

2. The rotary-type fluid machine of claim 1, wherein

each of the two cylinder chambers has a ring shape;

each of the two the piston members is formed by a ring-shaped piston housed eccentrically in one of the ring-shaped cylinder chambers such that the cylinder chamber is partitioned into an outside cylinder chamber and an inside cylinder chamber; and

each of the two first cylinder chambers is formed by one of the outside cylinder chambers and each of the two second cylinder chambers is formed by one of the inside cylinder chambers.

3. The rotary-type fluid machine of claim 2, wherein

each of the two ring-shaped pistons is formed with a straight portion arranged at a circumferential part thereof extending in circumferential directions and continuing to other parts thereof;

each of the two cylinder members is formed with a groove portion perpendicular to the straight portion received therein and extending across the outside cylinder chamber and the inside cylinder chamber thereof; and

each of the two blade members includes

an outside blade portion partitioning one of the outside cylinder chambers,

an inside blade portion united with the outside blade portion and partitioning one of the inside cylinder chambers, and

a concave portion formed between the outside blade portion and the inside blade portion and fitted slidably with the straight portion of one of the ring-shaped pistons by being fitted slidably into the groove portion of one of the cylinder members.

4. A rotary-type fluid machine, comprising:

a compression mechanism including two eccentric-rotation type piston mechanisms arranged one on top of the other; and

a drive mechanism including a drive shaft that is configured and arranged to drive both eccentric-rotation type piston mechanisms,

each of the two eccentric-rotation type piston mechanisms including

a cylinder formed with a cylinder chamber and having the drive shaft penetrating a central part thereof,

a piston housed in the cylinder chamber such that the piston is eccentric to the cylinder chamber, and

two vanes partitioning the cylinder chamber into a first cylinder chamber and a second cylinder chamber,

the piston being configured and arranged to make eccentric rotational motion relative to the cylinder,

eccentricity directions of the pistons having an angle of 180 degrees therebetween around an axial center of the drive shaft,

the two vanes each of the two eccentric-rotation type piston mechanisms being arranged in positions shifted by 180 degrees from each other around the axial center of the drive shaft, and

opening directions of two suction ports in one of the eccentric-rotation type piston mechanisms being shifted by 90 degrees with respect to opening directions of two suction ports in the other eccentric-rotation type piston mechanism, respectively, and opening directions of two discharge ports in the one compression eccentric-rotation type piston mechanism being shifted by 90 degrees with respect to opening directions of two discharge ports in the other eccentric-rotation type piston mechanism, respectively.