Reciprocating compressor
View Patent ↗A reciprocating compressor includes: a low-pressure stage compression part for compressing low-pressure working gas supplied from a supply source; two high-pressure stage compression parts for compressing the working gas compressed by the low-pressure stage compression part at two stages; and a crank mechanism for driving the low-pressure stage compression part and the high-pressure stage compression parts. The two high-pressure stage compression parts each have a plunger and a cylinder and are arranged on both sides of the crank mechanism in such a way as to extend coaxially opposite to each other. The low-pressure stage compression part has a piston and a cylinder and is located in the middle of the two high-pressure stage compression parts. The crank mechanism, the low-pressure stage compression part, and the two high-pressure stage compression parts are substantially located in the same plane.
1. A reciprocating compressor, comprising:
a low-pressure stage compression part for compressing low-pressure working gas supplied from a supply source;
two high-pressure stage compression parts for compressing the working gas compressed by the low-pressure stage compression part at two stages; and
a crank mechanism for driving the low-pressure stage compression part and the high-pressure stage compression parts,
wherein the two high-pressure stage compression parts each have a plunger and a cylinder and are arranged on both sides of the crank mechanism in such a way as to extend coaxially opposite to each other,
wherein the low-pressure stage compression part has a piston and a cylinder and is arranged in the middle of the two high-pressure stage compression parts in such a way as to extend,
wherein the crank mechanism includes:
an eccentric shaft part that is provided eccentrically in a main shaft part of the crankshaft;
a low-pressure stage cross head that is coupled to the piston via a piston rod;
a low-pressure stage connecting rod has one end of which is coupled to the eccentric shaft part and the other end of which is coupled to the low-pressure stage cross head;
a high-pressure stage cross head that is coupled to the two plungers via respective plunger rods;
a high-pressure stage connecting rod has one end of which is coupled to the eccentric shaft part and the other end of which is coupled to the high-pressure stage cross head, is arranged in such a way as to move in a horizontal direction and has an opening formed through its top frame part in a vertical direction;
the high-pressure stage cross head is formed in a shape of one nearly rectangular frame,
the eccentric shaft part, the low-pressure stage connecting rod, and the high-pressure stage connecting rod are arranged in the frame of the high-pressure stage cross head,
the high-pressure stage cross head has an opening formed through its top frame part in a vertical direction,
the low-pressure stage connecting rod is passed through the opening and is coupled to the eccentric shaft part and the low-pressure stage cross head, and
the crank mechanism, the low-pressure stage compression part, and the two high-pressure stage compression parts are arranged in such a way that they are substantially located in a same plane.
2. The reciprocating compressor as claimed in claim 1 ,
wherein one end of the high-pressure stage connecting rod is bifurcated and coupled to the eccentric shaft part, and
wherein one end of the low-pressure stage connecting rod is arranged in a center space between bifurcated portions of the high-pressure stage connecting rod and is coupled to the eccentric shaft part.