KR19990002546U - Roller of compressor - Google Patents

Abstract

In the compressor of the compressor according to the present invention, there is provided a roller inserted into an outer circumferential surface of a cam rotating 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. Since the first and second coating layers are formed by a protective coating on the surface of the roller, the present invention provides a titanium nitride having a thickness of 0.1 to 10 μm on the surface of the roller inserted into the outer circumferential surface of the cam in the cylinder. By forming the first and second coating layers with a thin film of TiN) and tungsten carbide carbon (WC / C), the wear resistance and hardness of the roller may be increased to improve durability of the compressor.

Description

Roller of 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 of a compressor having improved wear resistance of the roller.

Generally, 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 rotatably inserted 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 due to suction of the refrigerant is provided at one side of the cylinder 6. The accumulator 10 which attenuates the pressure is connected via the suction pipe 11, and the discharge tube which discharges the refrigerant gas discharged through the muffler 9 to the outside of the case 1 on the upper side of the case 1; (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, in the cylinder 6, a roller 5 provided on the outer circumferential surface of the cam 3a eccentric to the lower end of the rotation shaft 3 is in contact with the inner circumferential surface of the cylinder 6 while the cylinder ( 6) A vane 15 is provided in sliding contact with the roller 5 so as to partition the space in the suction space and the compression space.

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. Due to the eccentric rotation of the roller 5, the vane 15 slides in contact with the outer circumferential surface of the roller 5 while the vane 15 slides due to the springing action of the spring 16 to form a suction space and a compression space. Bar is formed, the refrigerant is sucked through the inlet 6a via the accumulator 10 and the suction pipe 11 by the suction force acting while the cam (3a) is rotated in the clockwise direction, the discharge port Through 6b, the refrigerant compressed to high temperature and high pressure 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 to achieve a smooth rotation operation.

However, in the conventional compressor as described above, the refrigerant sucked through the inlet 6a of the cylinder 6 has used R22. However, the refrigerant is regulated for use because it destroys the earth's ozone layer. A mixed refrigerant R407c is used, and the oil 13 rotates in the cylinder 6 as it uses polyol ester (POE) or ether (ETHER) type refrigeration oil compatible with the refrigerant R407c. There was a problem that the phenomenon that the roller 5 is worn and sintered at a high speed occurs.

Therefore, the present invention has been devised to solve the above problems, the object of the present invention is a polyol ester (POE) or ether compatible with R407C or R410A, which is an alternative refrigerant of hydrofluorocarbon (HFC) system An object of the present invention is to provide a roller for a compressor which prevents wear or sintering of the roller under the condition of using the (ETHER) type refrigeration oil.

In order to achieve the above object, a roller of a compressor according to the present invention divides a roller into a suction space and a compression space while being in sliding contact with a roller inserted into an outer circumferential surface of a cam rotating in a cylinder and an outer circumferential surface of the roller. In a compressor provided with vanes, the first and second coating layers are formed by a protective coating on the surface of the roller.

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 compressor according to the present invention.

* Description of the symbols for the main parts of the drawings *

3: rotating shaft 3a: cam

5 roller 5a first coating layer

5b: second coating layer 6: cylinder

6a: suction port 6b: discharge port

15: vane

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

2 and 3, the cylinder 6 is in sliding contact with the outer circumferential surface of the cam 3a that rotates in the cylinder 6 and the outer circumferential surface of the roller 5. In the compressor provided with the vane 15 which divides the inside into the suction space and the compression space, first and second coating layers 5a and 5b are formed on the surface of the roller 5 by protective coating.

That is, the first and second coating layers 5a and 5b are made of thin films of titanium nitride (TiN) and tungsten carbide carbon (WC / C), respectively, and are multi-layer coated in that order. 2 The thickness of coating layers 5a and 5b is 0.1 or more and 10 micrometers or less, respectively.

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 this coating, in particular, the wear resistance is improved on the roller 5 and the surface hardness is increased by coating a thin film of titanium nitride (TiN) and tungsten carbide carbon (WC / C) on the surface, and the corrosion resistance and the cylinder ( The lubricity of the oil 13 which helps lubrication of the inner wall of 6) and components, such as the roller 5 and the vane 15 in it, improves.

As described above, according to the roller of the compressor according to the present invention, titanium nitride (TiN) and tungsten carbide carbon (WC / By forming the first and second coating layers by using a thin film as in C), the wear resistance and hardness of the roller can be increased to improve durability of the compressor.

Claims (4)

A compressor provided with a roller inserted into an outer circumferential surface of a cam rotating in a cylinder, and a vane for sliding the cylinder into a suction space and a compression space while slidingly contacting the outer circumferential surface of the roller. The roller of the compressor characterized in that the first and second coating layer is formed on the surface of the roller by a protective coating. The method of claim 1, The first and second coating layer is a roller of the compressor, characterized in that made of a thin film of titanium nitride (TiN) and tungsten carbide carbon (WC / C), respectively. The method according to claim 1 or 2, The roller of the compressor, characterized in that the multi-layer coating in the order of the first and second coating layer. The method of claim 1, wherein The rollers of the compressor, characterized in that the thickness of the first and second coating layer is 0.1 to 10㎛ respectively.