JP3553776B2 - Rotary compressor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly, to a roller provided eccentrically rotating in a cylinder provided in a rotary compressor to perform compression, and a compression chamber and a suction chamber which are elastically protruded in the cylinder and come into contact with the roller. And a combination of materials with a vane forming the same.
[0002]
[Prior art]
As is well known, in a rotary compressor, a roller rotates eccentrically in a cylindrical cylinder, and a vane elastically projecting in the cylinder comes into contact with the roller, whereby the cylinder and the roller The crescent-shaped space formed therebetween is divided into two, and a compression chamber and a suction chamber are formed.
[0003]
Since the vane and the roller come into contact with each other and generate friction, a material having wear resistance to the friction is selected. Conventionally, SKH51 coated with CrN or a composite material in which TiN and TiC particles are dispersed in a sintered material equivalent to SKH51 is used as the material of the vane. As the material of the roller, a material obtained by quenching cast iron to which Cr or B was added was used. These two materials are a general combination.
[0004]
[Problems to be solved by the invention]
However, with the above two materials, there is a problem that the dimensions of the vane coating process vary, or the production cost is high, so that mass production is inferior.
[0005]
The present invention has been made in order to solve the above problems, and has an object to provide a vane and a roller having a combination of materials having small dimensional variations, low manufacturing costs, and excellent mass productivity. And
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a first invention is directed to a cylindrical cylinder, a roller eccentrically rotating in the cylinder, and a projection provided in the cylinder to contact the roller, and the cylinder and the roller And a vane forming a compression chamber and a suction chamber by bisecting the space between
The vane is made of Al-impregnated carbon, and has a firing temperature of about 680 to 730 ° C., wherein Al ₃ C ₄ generated at the boundary between carbon and aluminum is increased to 5 to 10%.
The roller is a rotary compressor in which chilled cast iron is Ni-P-based plated.
[0007]
Claims second invention, furthermore, the roller, which in a matrix of the plating film of Ni-P-based plating process, characterized in that it dispersed 1-5% of TiN, ceramic particles the Si ₃ N ₄ Item 4. A rotary compressor according to item 1.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 illustrates a rotary compressor according to an embodiment of the present invention, that is, a hermetic rotary compressor that compresses refrigerant gas.
[0009]
The rotary compressor 1 has a cylindrical hermetic container 3 installed by a mounting leg 5 in a state where the axis of the cylinder is made vertical. A rotating shaft 7 is rotatably supported inside the sealed container 3 concentrically with the cylindrical shaft. A rotor core (not shown) is fixed above the rotation shaft 7. A stator core (not shown) is fixedly provided on the inner wall of the closed casing 3 on the outer peripheral side of the rotor core via a predetermined gap, and a motor winding (not shown) is fixedly provided adjacently above and below the stator core. The energization causes the rotation shaft 7 to rotate.
[0010]
A cylindrical cylinder 9 is provided coaxially around the rotation shaft 7. The shape of the rotating shaft 7 inside the cylinder 9 is eccentric with respect to the axis of the rotating shaft 7 to form a cylindrical eccentric shaft portion 11. A cylindrical roller 13 is arranged on the outer periphery of the eccentric shaft portion 11. As a result, when the rotation shaft 7 rotates, the roller 13 eccentrically rotates while rotating in contact with the inner wall of the cylinder 9.
[0011]
A crescent-shaped space 15 is formed between the roller 13 and the cylinder 9.
A vane 17 elastically projecting from the inner peripheral wall of the cylinder 9 divides the crescent-shaped space 15 into two, and each of the divided spaces is caused by the eccentric rotation of the roller 13 (counterclockwise in the drawing), The left side is the suction chamber 19 and the right side is the compression chamber 21. The space volume of the suction chamber 19 increases as the eccentric rotation of the roller 13 advances. The space volume of the compression chamber 21 decreases as the eccentric rotation proceeds. A suction port 23 is formed in the cylinder 9 on the left side of the vane 17 in the drawing, faces the suction chamber 19, is further connected to a suction pipe 25, and is guided to the outside of the sealed container 3. Further, a discharge port 27 is formed on the right side of the vane 17 and faces the compression chamber 21. The discharge port 27 is further connected to a discharge pipe and guided to the outside of the sealed container 3.
[0012]
The vane 17 is made of Al-impregnated carbon. As the Al-impregnated carbon, for example, NC-094 (manufactured by Nippon Carbon Co., Ltd.) is used. The Al-impregnated carbon used in the present invention is made of carbon and aluminum by raising the firing temperature to about 680-730 ° C. Al ₃ C ₄ generated at the boundary can be increased to 5 to 10%. Thereby, wear resistance can be improved.
[0013]
The rollers are made of cast iron (equivalent to FC-300), and are chilled and quenched. This chilling treatment may be performed by rapid cooling by die casting or quenching, or by carburization. A Ni-P-based plating process is performed thereon. This is in a matrix of Ni-P-based plating film which is formed by plating, TiN, is present in 1-5% dispersing ceramic particles of _Si 3 _{N 4.}
[0014]
By using such materials and treatments, not only can the roller and the vane each have improved abrasion resistance than in the past, but it is also possible to suppress the dimensional variation by avoiding the plating process on the vane, thereby reducing the manufacturing cost. Therefore, mass productivity can be improved.
[0015]
【The invention's effect】
As described above, according to the vane and the roller of the rotary compressor according to the present invention, the wear resistance can be improved as compared with the related art, and the vane is not subjected to plating, so that dimensional variation due to plating can be suppressed. And cost reduction, and mass productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a horizontal sectional view near a cylinder of a rotary compressor according to one embodiment of the present invention.
[Explanation of symbols]
9 Cylinder 13 Roller 17 Vane 19 Suction chamber 21 Compression chamber 23 Suction port 27 Discharge port

Claims (2)

A cylindrical cylinder, a roller eccentrically rotating within the cylinder, and a projection provided in the cylinder and in contact with the roller, dividing the space between the cylinder and the roller into two to form a compression chamber and a suction chamber. A rotary compressor comprising: a vane to be formed;
The vane is made of Al-impregnated carbon, and has a firing temperature of about 680 to 730 ° C., wherein Al ₃ C ₄ generated at the boundary between carbon and aluminum is increased to 5 to 10%.
A rotary compressor, wherein the roller is obtained by subjecting chilled cast iron to Ni-P plating. 2. The rotary compressor according to claim 1, wherein the roller has 1 to 5% of TiN and Si ₃ N ₄ ceramic particles dispersed in a matrix of a plating film of a Ni—P plating process. ₃ .

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