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US 10,718,331 B2Granted
Compressor having a lubrication surface formed on a roller thereof
AssigneeLG Electronics Inc.
InventorsSeokhwan Moon, Yunhi Lee, Byeongchul Lee
Life of this patent
Estimating the term…
Abstract
Disclosed is a compressor. A lubrication surface, which has the same curvature as an inner circumferential surface curvature of a cylinder and which has a predetermined circumference length, is formed on an outer circumferential surface of a roller contacting an inner circumferential surface of the cylinder. With such a configuration, since the outer circumferential surface of the roller contacting the inner circumferential surface of the cylinder come in surface-contact with each other, an oil film is formed between the roller and the cylinder with a wide area. This can reduce a frictional loss.
Claims13
A compressor, comprising:
- a driving motor;
- a rotational shaft configured to transmit a rotational force of the driving motor;
- a cylinder installed at one side of the driving motor;
- a roller having an outer circumferential surface contacting an inner circumferential surface of the cylinder, rotated by the rotational shaft, and concentric with the cylinder;
- and
- at least two vanes movably provided at the cylinder, contacting the outer circumferential surface of the roller, and configured to divide at least two compression spaces formed by the cylinder and the roller into a suction chamber and a compression chamber, wherein the roller includes a lubrication surface provided on the outer circumferential surface of the roller in surface-contact with the inner circumferential surface of the cylinder, wherein the lubrication surface has a same radius from a rotation center of the roller and is formed on both sides of a line passing through the rotation center of the roller and two points on a long axis of an ellipse in a circumferential direction, wherein the roller includes a plurality of compression surfaces provided on the outer circumferential surface of the roller spaced apart from the inner circumferential surface of the cylinder to form the compression chamber, wherein an increase portion having a distance sum of distances from two points located at a same distance on both sides of the line passing through the rotation center of the roller to an arbitrary point on the outer circumferential surface of the roller being gradually increased, and a decrease portion extending from the increase portion and having the distance sum being gradually decreased to the distance sum of the two points that make up the ellipse, are formed on the outer circumferential surface of the roller, and wherein the distance sums that are measured on the outer circumferential surface of the roller starting at a location closer to the minor axis are compared to the distance sums that are measured closer toward the major axis.
3 more elements
A compressor, comprising:
- a driving motor;
- a rotational shaft configured to transmit a rotational force of the driving motor;
- a cylinder installed at one side of the driving motor;
- a roller having an outer circumferential surface contacting an inner circumferential surface of the cylinder, rotated by the rotational shaft, and concentric with the cylinder;
- and
- at least two vanes movably provided at the cylinder, contacting an outer circumferential surface of the roller, and configured to divide at least two compression spaces formed by the cylinder and the roller into a suction chamber and a compression chamber, wherein the roller includes:
- a first curved surface spaced from the inner circumferential surface of the cylinder, wherein the first curved surface has a sum of distances from two points on a line passing through a rotation center of the roller to the outer circumferential surface of the roller being increased, formed on the outer circumferential surface of the roller, and wherein the distance sums that are measured on the outer circumferential surface of the roller starting at a location closer to the minor axis and are compared to the distance sums that are measured closer toward the major axis;
- and
- a second curved surface contacting the inner circumferential surface of the cylinder, wherein the second surface has a sum of distances from two points on a line passing through a rotation center of the roller to the outer circumferential surface of the roller is decreased, formed on the outer circumferential surface of the roller, wherein the distance sums that are measured on the outer circumferential surface of the roller starting at a location closer to the minor axis and are compared to the distance sums that are measured closer toward the major axis, and wherein a curvature radius of the second curved surface is formed to be equal to a curvature radius of the inner circumferential surface of the cylinder.
6 more elements
A compressor, comprising:
- a driving motor;
- a rotational shaft configured to transmit a rotational force of the driving motor;
- a cylinder installed at one side of the driving motor;
- a roller having an outer circumferential surface contacting an inner circumferential surface of the cylinder, rotated by the rotational shaft, and concentric with the cylinder;
- and
- at least two vanes movably provided at the cylinder, contacting an outer circumferential surface of the roller, and configured to divide at least two compression spaces formed by the cylinder and the roller into a suction chamber and a compression chamber, wherein the roller includes a lubrication surface provided on the outer circumferential surface of the roller in surface-contact with the inner circumferential surface of the cylinder, wherein the lubrication surface has a same radius from a rotation center of the roller and is formed on both sides of a line passing through the rotation center of the roller and two points on a long axis of an ellipse in a circumferential direction, wherein an oil passage is formed at the rotational shaft, and wherein an oil hole, which communicates with the oil passage toward the lubrication surface of the roller contacting the inner circumferential surface of the cylinder, is formed at the roller, and wherein the oil hole extends from the oil passage to the lubrication surface.
3 more elements
Dependencies are inferred from the claim text.