A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.

A fixed-rail rotor pump and fixed-rail rotor pump combined supercharging internal combustion engine are described. In the fixed-rail rotor pump, a rotor shaft runs through a rotor; the rotor is internally tangent to the inner wall of the cylinder; the inner side of at least one side of a cylinder-end cover is fixed with a convex fixed-rail disposed concentrically with the cylinder; the rotor runs through the cylinder end cover and the fixed-rail; a piston is provided along the external periphery of the rotor and is rotatably connected to the rotor via a rotating shaft of the piston; the rotor is provided with a piston comprises a top arc surface, a bottom arc surface the three angels of the piston constitute an equilateral triangle; the top angle of the piston keeps contact with the inner wall of the cylinder; the bottom arc surface of the piston is externally tangent to the outer peripheral surface of the fixed-rail; the piston moves in a curved path around the fixed-rail.

A fixed-rail rotor pump and fixed-rail rotor pump combined supercharging internal combustion engine are described. In the fixed-rail rotor pump, a rotor shaft runs through a rotor; the rotor is internally tangent to the inner wall of the cylinder; the inner side of at least one side of a cylinder-end cover is fixed with a convex fixed-rail disposed concentrically with the cylinder; the rotor runs through the cylinder end cover and the fixed-rail; a piston is provided along the external periphery of the rotor and is rotatably connected to the rotor via a rotating shaft of the piston; the rotor is provided with a piston comprises a top arc surface, a bottom arc surface the three angels of the piston constitute an equilateral triangle; the top angle of the piston keeps contact with the inner wall of the cylinder; the bottom arc surface of the piston is externally tangent to the outer peripheral surface of the fixed-rail; the piston moves in a curved path around the fixed-rail.

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.

Disclosed herein is a vane rotary compressor in which a fluid such as a refrigerant is compressed while a volume of a compression chamber is reduced during rotation of a rotor. There is provided a vane rotary compressor capable of preventing a delay of rotation operation of a vane by respectively forming oil films on both sides of a hinge portion of the vane in a rotation direction thereof and smoothly sliding the hinge portion.

Disclosed herein is a vane rotary compressor in which a fluid such as a refrigerant is compressed while a volume of a compression chamber is reduced during rotation of a rotor. There is provided a vane rotary compressor capable of preventing a delay of rotation operation of a vane by respectively forming oil films on both sides of a hinge portion of the vane in a rotation direction thereof and smoothly sliding the hinge portion.

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.