Rotating cylinder type compressor

Abstract

A rotating cylinder type compressor includes: a cylinder having a cylindrical shape and rotating about a central axis; a first rotor and a second rotor each having a cylindrical shape and rotating about an eccentric axis eccentric to the central axis of the cylinder; a shaft; a first vane; and a second vane. The first vane is slidably fitted to a first groove portion defined in the first rotor to define a first compression chamber. The second vane is slidably fitted to a second groove portion defined in the second rotor to define a second compression chamber. The first rotor and the second rotor are arranged in an extending direction of the central axis of the cylinder.

What is claimed is: 
     
         1 . A rotating cylinder type compressor comprising:
 a cylinder having a cylindrical shape and rotating about a central axis;   a first rotor and a second rotor arranged inside the cylinder, each of the first rotor and the second rotor having a cylindrical shape and rotating about an eccentric axis eccentric to the central axis of the cylinder;   a shaft that rotatably supports the first rotor and the second rotor;   a first vane slidably fitted to a first groove portion defined in the first rotor and defining a first compression chamber between an outer circumference surface of the first rotor and an inner circumference surface of the cylinder; and   a second vane slidably fitted to a second groove portion defined in the second rotor and defining a second compression chamber between an outer circumference surface of the second rotor and an inner circumference surface of the cylinder, wherein   the first rotor and the second rotor are arranged in an extending direction of the central axis of the cylinder,   a shaft side inlet passage is defined inside the shaft to introduce fluid drawn from outside to be compressed into the first compression chamber and the second compression chamber,   a first shaft side exit hole through which the fluid flows from the shaft side inlet passage to the first compression chamber and a second shaft side exit holes through which the fluid flows from the shaft side inlet passage to the second compression chamber are defined in an outer circumference surface of the shaft, and   the first compression chamber and the second compression chamber are connected in parallel to a flow of the fluid.   
     
     
         2 . The rotating cylinder type compressor according to  claim 1 , wherein
 the eccentric axis of the first rotor and the eccentric axis of the second rotor are arranged on the same axis.   
     
     
         3 . The rotating cylinder type compressor according to  claim 1 , wherein
 a rotation angle of the cylinder where a fluid pressure in the first compression chamber reaches the maximum pressure, and a rotation angle of the cylinder where a fluid pressure in the second compression chamber reaches the maximum pressure are shifted from each other by 180 degrees.   
     
     
         4 . The rotating cylinder type compressor according to  claim 1 , wherein
 the first rotor has a first oil passage extending in the axial direction of the shaft, lubricating oil flowing through the first oil passage lubricating a sliding part, and   the second rotor has a second oil passage extending in the axial direction of the shaft, lubricating oil flowing through the second oil passage lubricating a sliding part.   
     
     
         5 . The rotating cylinder type compressor according to  claim 1 , further comprising:
 a motion transmitting mechanism that transmits rotation power from the cylinder to the first rotor and the second rotor so that the first rotor and the second rotor carry out synchronous rotation with the cylinder; and   a middle side plate arranged between the first rotor and the second rotor to define the first compression chamber and the second compression chamber, the middle side plate rotating with the cylinder, wherein   the motion transmitting mechanism includes a drive pin projected from the middle side plate toward the first rotor and the second rotor in the extending direction of the central axis, and a first hole part and a second hole part respectively formed in the first rotor and the second rotor, to which the drive pin is fitted.   
     
     
         6 . The rotating cylinder type compressor according to  claim 5 , further comprising:
 a ring component fitted in each of the first hole part and the second hole part to restrict wear of an outer circumference side wall surface where the drive pin contacts.   
     
     
         7 . The rotating cylinder type compressor according to  claim 5 , wherein
 the first rotor has a first oil passage extending in the axial direction of the eccentric axis, lubricating oil lubricating a sliding part flowing through the first oil passage,   the first hole part is formed at an end of the first oil passage in the axial direction,   the second rotor has a second oil passage extending in the axial direction of the eccentric axis, lubricating oil lubricating a sliding part flowing through the second oil passage, and   the second hole part is formed at an end of the second oil passage in the axial direction.   
     
     
         8 . The rotating cylinder type compressor according to  claim 1 , further comprising:
 a middle side plate arranged between the first rotor and the second rotor to define the first compression chamber and the second compression chamber, the middle side plate rotating with the cylinder;   a first side plate fixed to one end of the cylinder in the axial direction to define the first compression chamber with the middle side plate;   a second side plate fixed to the other end of the cylinder in the axial direction to define the second compression chamber with the middle side plate, wherein   the first rotor has a first rotor side inlet passage, fluid to be compressed flowing into the first compression chamber through the first rotor side inlet passage,   the first side plate has a first discharge hole, fluid to be compressed flowing out of the first compression chamber through the first discharge hole,   the second rotor has a second rotor side inlet passage, fluid to be compressed flowing into the second compression chamber through the second rotor side inlet passage, and   the second side plate has a second discharge hole, fluid to be compressed flowing out of the second compression chamber through the second discharge hole.   
     
     
         9 . The rotating cylinder type compressor according to  claim 1 , further comprising:
 an electric motor part that rotates the cylinder, wherein   the cylinder is formed integrally with a rotor of the electric motor part, and   a stator of the electric motor part is arranged at an outer circumference side of the cylinder.