KR19990004281A - Rollers and vanes of the compressor - Google Patents

Abstract

The roller and the vane of the compressor according to the present invention include a roller inserted into an outer circumferential surface of a cam that rotates in a cylinder, and a compressor provided with vanes for partitioning the cylinder into a suction space and a compression space while slidingly contacting the outer circumferential surface of the roller. The surface coating layer coated with a thin film of chromium nitride is formed on the outer circumferential surface of the roller and the noise part of the vane, thereby preventing the wear and corrosion of the roller and the vane, and preventing the phenomenon of corrosion or sintering. To increase.

Description

Rollers and vanes of the compressor

The present invention relates to a rotary compressor for compressing and discharging a fluid such as a refrigerant, and more particularly, to a roller and a vane of a compressor having improved wear resistance and corrosion resistance of the roller and the vane.

In the conventional compressor, as shown in FIG. 1, a stator 2 is installed inside the sealed case 1, and a rotor 4 having a rotating shaft 3 is provided inside the stator 2. It is installed to rotate, the roller 5 is inserted into the outer side of the cam 3a eccentrically formed below the rotating shaft 3, the cam 3a and the roller 5 is the inner side of the cylinder (6) It is installed to be rotated in the upper and lower sides of the cylinder 6, the upper and lower flanges (7) (8) for rotatably supporting the rotating shaft (3) is fastened and fixed.

In addition, a muffler 9 for discharging the refrigerant gas compressed in the cylinder 6 is fastened and fixed to an upper side of the upper flange 7, and a noise or vibration caused by suction of the refrigerant is provided at one side of the cylinder 6. An attenuator 10 is connected via a suction pipe 11 to discharge the refrigerant gas discharged through the muffler 9 to the outside of the case 1 above the case 1. The discharge tube 12 is connected.

In addition, an oil pick-up member 14 which raises the oil 13 stored in the case 1 to the inside of the rotation shaft 3 and supplies the inside of the cylinder 6 and the inside of the upper flange 7 is provided. It is inserted and installed.

As shown in Fig. 2, the cylinder 6 has a roller 5 provided on the outer circumferential surface of the cam 3a eccentric to the lower end of the rotating shaft 3 while making a rolling contact with the inner circumferential surface of the cylinder 6; 6) The vane 15 which is in sliding contact with the roller 5 is provided so as to divide the space inside into the suction space and the compression space, and the vane 15 is always in front of the vane 15 at the rear side. The spring 16 is installed to have.

That is, the cylinder 6 has a suction port 6a connected to the suction pipe 11 so as to suck the refrigerant on one side of the vane 15, and the compressed refrigerant gas is discharged to the other side of the vane 15. The discharge port 6b is formed.

The compressor configured as described above includes a cam 3a which is integrally rotated with the rotation shaft 3 when the rotor 4 and the rotation shaft 3 rotate by a magnetic field formed by applying current to the stator 2. By the eccentric rotation of the roller (5) inside the cylinder (6) while sliding the vane (15) in sliding contact with the outer peripheral surface of the roller (5) to form a suction space and a compression space, wherein the cam ( Refrigerant is sucked through the intake port 6a via the accumulator 10 and the suction pipe 11 by the suction force acting while rotating 3a) clockwise, and compressed to high temperature and high pressure through the discharge port 6b. The refrigerant is discharged.

In addition, the oil pick-up member 14 rotated according to the operation of the rotating shaft 3 raises the oil 13 stored in the case 1 and discharges it through the outer circumferential surface of the rotating shaft 3 to thereby form the inner side of the cylinder 6. Or by supplying the oil (13) to the inside of the upper flange (7) is a smooth rotation operation is made.

However, the conventional compressor as described above is a mineral oil (Minera), which is a refrigeration oil compatible with R22 of the hydrochlorofluorocarbon (HCFC) system, which is a refrigerant sucked through the inlet 6a of the cylinder 6. Although these systems have been used, these refrigerants are polyol esters or ethers that are compatible with R407c or R410A of the hydroflourcarbon system, which is a mixed refrigerant that has been regulated and replaced instead of destroying the earth's ozone layer. As the refrigeration oil of the (Ether) system is used, the roller 5 rotating in the cylinder 6 and the vane 15 contacted with the roller 5 in front and rear operation are worn and corroded at a high speed. As well as the phenomenon occurs, there was a problem of shortening the life of the compressor.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to use a refrigeration oil of a polyol ester or ether system compatible with R407C or R410A, which is an alternative refrigerant of a hydrofluorocarbon system. It is to provide a roller and vane of the compressor to increase the life of the compressor by preventing the wear and corrosion or sintering of the roller and vanes under the conditions.

In order to achieve the above object, the roller and the vane of the compressor according to the present invention include a roller inserted into an outer circumferential surface of a cam rotating in a cylinder, and a suction space and a compression space in the cylinder while slidingly contacting the outer circumferential surface of the roller. The vane is provided with a vane partition, characterized in that the surface coating layer coated with a thin film of chromium nitride on the outer peripheral surface of the roller and the noise portion of the vane.

1 is a longitudinal sectional view showing a general compressor;

2 is a plan sectional view showing a cylinder of the compressor;

3 is a cross-sectional view showing a roller of the present invention;

4 is a cross-sectional view showing the vane of the present invention.

Explanation of symbols for the main parts of the drawings

3: rotating shaft 3a: cam

5: roller 6: cylinder

15: vane 100,110: surface coating layer

Hereinafter, the configuration and operation of an embodiment of the present invention will be described in detail.

In the drawings, the same components as those in the related art are denoted by the same names and the same reference numerals, and detailed description thereof will be omitted.

In the drawings, reference numerals 100 and 110 indicate that the roller 5 rotates in the cylinder 6 under the condition of using polyol ester or ether-based refrigeration oil compatible with R407C or R410A, which is an alternative refrigerant of hydrofluorocarbon system. The surface coating layer coated with a thin film of chromium nitride (CrN) on the outer circumferential surface of the roller (5) and the noise portion of the vane (15) to prevent contact with the vanes (15) to prevent wear and corrosion from each other.

That is, the surface coating layers 100 and 110 are coated with a thickness of 0.5 to 5 μm on the outer circumferential surface of the roller 5 and the noise portions of the vanes 15, respectively, as shown in FIGS. 3 and 4, The coating consists of a Physical Vapor Deposition method.

On the outer circumferential surface of the roller 5 and the noise portion of the vane 15, the adhesion between the surface coating layer 100 and the roller 5 or the surface coating layer 110 and the vane 15 before coating chromium nitride is high. Each super finish is processed.

The coating is a kind of metal surface treatment, which is a treatment for giving the metal surface abrasion resistance, corrosion resistance, heat resistance or lubricity.

Other metal surface treatments include plating, coloring, and painting on metal surfaces.

By such coating, in particular, the wear resistance and corrosion resistance of the roller 5 and the vane 15 are improved and the surface hardness is increased by forming the surface coating layers 100 and 110 made of a thin film of chromium nitride on the surface. 3 to 5 times higher abrasion resistance and corrosion resistance than conventional rollers and vanes, and helps lubrication of the inner wall of the cylinder 6 and parts such as rollers 5 and vanes 15 therein. The lubricity of the oil 13 is improved.

As described above, according to the roller and the vane of the compressor according to the present invention, the thickness of 0.5 to 5μm on the outer peripheral surface of the roller inserted into the outer peripheral surface of the cam in the cylinder and the noise portion of the vane inserted on one side of the cylinder 6 Since the surface coating layer of chromium nitride is formed, the wear resistance and corrosion resistance of the surface of the roller and the vane are improved, and the sintering phenomenon can be prevented, thereby increasing the life of the compressor.

Claims (5)

A compressor having a roller inserted into an outer circumferential surface of a cam rotating in a cylinder and a vane slidingly contacting the outer circumferential surface of the roller and partitioning the cylinder into a suction space and a compression space, the noise portion of the outer circumferential surface of the roller and the vane Roller and vane of the compressor, characterized in that to form a surface coating layer coated with a thin film of chromium nitride. The roller and vane of claim 1, wherein the surface coating layer has a thickness of 0.5 to 5 μm. 2. The roller and vane of claim 1, wherein the coating of the surface coating layer is made by a method of circular vapor deposition. 2. The roller and vane of claim 1, wherein the outer circumferential surface of the roller is subjected to superfinish treatment to increase adhesion between the surface coating layer and the roller before coating the chromium nitride. The compressor and the vane of claim 1, wherein the noise portion of the vane is subjected to superfinish treatment to increase adhesion between the surface coating layer and the vane before the chromium nitride is coated.