Reciprocative Compressor
AssigneeHitachi Industrial Equipment Systems Co., Ltd.
InventorsAkito OHATA, Hisatoshi Kobayashi
Life of this patent
Estimating the term…
Abstract
This invention provides a swing-type reciprocative compressor capable of maintaining long durability and preventing propagation of heat to the large end portion of a piston, even under high-compression. In the reciprocative compressor having a swing-type piston mechanism, a piston ring is attached to a piston ring groove to seal between a piston and a cylinder. A ring groove is provided separately from the piston ring groove on the outer circumferential side of the piston and on the crankshaft side of the piston ring groove. A guide ring restricted from moving in a radial direction and shaped like a skirt opening toward the crankshaft side is provided in the ring groove.
Claims16
A reciprocative compressor comprising:
- a cylinder;
- a piston having one end side as a connecting portion rotatably connected to a crankshaft and the other end side swingably reciprocating in the cylinder;
- a piston ring groove located on an outer circumferential side of the piston;
- a piston ring attached to the piston ring groove to seal between the piston and the cylinder;
- a ring groove provided separately from the piston ring groove on the outer circumferential side of the piston and on the crankshaft side of the piston ring groove;
- and
- a guide ring restricted from moving in a radial direction and provided in the ring groove.
A reciprocative compressor comprising:
- a cylinder;
- a piston having one end side as a connecting portion rotatably connected to a crankshaft and the other end side swingably reciprocating in the cylinder;
- a piston ring groove located on an outer circumferential side of the piston;
- a piston ring attached to the piston ring groove to seal between the piston and the cylinder;
- a ring groove provided separately from the piston ring groove on the outer circumferential side of the piston and on the crankshaft side of the piston ring groove;
- and
- a guide ring provided in the ring groove to suppress radial movement of the piston.
A reciprocative compressor which has a combination of at least two pistons with corresponding cylinders and in which gas compressed by a first-stage compression side piston and cylinder mechanism is further high-pressure compressed by a second-stage compression side piston and cylinder mechanism,
- the piston on the second-stage compression side comprising:
- a piston ring groove located on an outer circumferential side of the piston;
- a piston ring attached to the piston ring groove to seal between the piston and the cylinder;
- a ring groove provided separately from the piston ring groove on the outer circumferential side of the piston and on the crankshaft side of the piston ring groove;
- and
- a guide ring restricted from moving in a radial direction and provided in the ring groove.
Dependencies are inferred from the claim text.