JPH04237892A - Rotary compressor - Google Patents

Abstract

PURPOSE:To prevent wear and seizure in vane sliding parts of main and sub bearing plate surfaces. CONSTITUTION:A vane is provided with an oil feed hole 54 which supplies oil 64 to a side face of the vane 51 reciprocatively sliding after a roller 69 rolling in a cylinder 65, and to plate surfaces of a main bearing 67 and a sub- bearing 68. The vane is installed in a compressor.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor incorporated into a refrigeration system such as a refrigerator-freezer.

0002

2. Description of the Related Art In recent years, rotary compressors are required to have high efficiency and high structural reliability.

An example of a conventional rotary compressor will be explained below with reference to the drawings. 4 and 5 show the mechanism of a conventional rotary compressor disclosed in Japanese Unexamined Patent Publication No. 62-271985.

[0004] Reference numeral 1 is a closed case. 2 is the stator, 3
The motor consists of a rotor. Reference numeral 4 denotes oil, which is stored in the sealed case 1. A cylinder 5 forms a compression chamber at the center of rotation of the motor.

Reference numeral 6 denotes a crankshaft, which has an eccentric portion formed in the cylinder 5, and one end of which is press-fitted into the rotor 3. 7 is a main bearing, and 8 is a sub-bearing, which pivotally supports the crank 6 and seals both end surfaces of the cylinder 5.

[0006] Reference numeral 9 denotes a roller mounted on the eccentric portion of the crankshaft 6. 10 is a vane whose tip has an arc shape,
It is pressed against the outer peripheral surface of the roller 9. Reference numeral 11 denotes a slit provided in the cylinder 5, into which the vane 10 is loosely fitted.

A spring 12 pushes the vane 10 against the roller 9. 13 is an oil supply groove provided on the back surface of the vane.

The operation of the above configuration will be explained. The rotational force of the rotor 3 of the motor is transmitted to the crank 6, and the roller 9 mounted on the eccentric portion rotates eccentrically within the cylinder 5.

The vane 10 slides reciprocally within the slit 11 following the eccentric rotation of the roller 9 to partition the inside of the cylinder 5 into a suction chamber and a compression chamber, and the frozen gas compressed in the compression chamber is stored in a sealed case. It is discharged.

[0010] Also, the oil supply groove 1 provided on the back surface of the vane 10
3 to improve the wear resistance of the slit 11 and vane 10.

[0011]

[Problems to be Solved by the Invention] However, with the above configuration, sufficient oil is not supplied to the sides of the vane 10 that slides back and forth at high speed, and to the main and sub-bearing plate surfaces, causing the main and sub-bearing plate surfaces to wear out, resulting in worst-case scenario. In this case, there was a problem that the product would seize up and become unoperable.

The present invention solves the above-mentioned conventional problems, and provides a highly reliable rotary compressor that provides sufficient oil to the main bearing, sub-bearing plate surface, and vane side surface, resulting in less wear and seizure. be.

[0013]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the rotary compressor of the present invention is provided with a vane oil supply hole.

The oil supply hole is constructed of a vane having one end on the side opposite to the arcuate surface and the other end communicating with the side surface of the vane facing the main and sub bearing plate surfaces.

[0015]

[Operation] According to the present invention, the pressure inside the closed container is high during operation due to the above-described structure, and oil enters from the oil supply hole provided on the opposite side of the arcuate surface due to back pressure and is supplied to the side surface of the vane. As the vanes slide, a fluid film of oil is formed in the gap between the main and sub-bearing plate surfaces, thereby preventing wear and seizure of the main and sub-bearing plate surfaces.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, 61 is a closed case. A stator 62 and a rotor 63 constitute a motor. Reference numeral 64 is oil, which is stored in the sealed case. A cylinder 65 forms a compression chamber at the center of rotation of the motor.

Reference numeral 66 denotes a crankshaft, which has an eccentric portion formed within the cylinder 65 and has one end press-fitted into the rotor 63. 67 is a main bearing, and 68 is a sub-bearing, which pivotally supports the crank 66 and seals both end surfaces of the cylinder 65.

A roller 69 is mounted on an eccentric portion of the crankshaft 66. A vane 51 has an arcuate tip and is pressed against the outer peripheral surface of the roller 69.

Reference numeral 71 denotes a slit provided in the cylinder 65, into which the vane 51 is loosely fitted. A spring 72 pushes the vane 51 against the roller 69. 53 is the pressure-applying surface of the spring 72 and is immersed in oil. 54
is an oil supply hole, which extends perpendicularly from the pressure surface 53 and is connected to the main oil supply hole.
The opening communicates with the side surface of the vane that faces the sub-bearing plate surface.

In the rotary compressor constructed as described above, during operation, the rotational force of the rotor 63 of the motor is transmitted to the crankshaft 66, and the roller 69 mounted on the eccentric portion rotates eccentrically along the inner wall of the cylinder 65.

Vane 5 pressed against the outer peripheral surface of roller 69
1 follows the eccentric rotation of the roller 69 and slides back and forth within the slit 71. Oil 64 enters from the oil supply hole 54 provided in the vane 51 due to back pressure, and is supplied through the oil supply hole 54 opened on both sides of the vane, forming an oil film in the gap between the main and sub bearing plate surfaces and the vane 51, thereby forming the vane. This will prevent wear and seizure of the sliding parts.

Furthermore, when the operation is stopped, the pressure inside the cylinder 55 is balanced with the internal pressure of the sealed case 61.
Oil 64 does not flow into 5.

[0023]

As described above, the present invention has an oil supply hole which has one end opening in the spring pressure surface opposite to the R surface and the other end opening in communication with the side surface of the vane facing the plate surface of the main and sub bearings. By constructing the vanes with the same diameter, oil is supplied to the gap between the main and sub-bearing plate surfaces and the vane side, and a fluid film is formed by the sliding of the vanes, preventing wear and seizure of the main and sub-bearing plate surfaces. can do.

[Brief explanation of the drawing]

[Fig. 1] Rotary compressor of the present invention

[Figure 2] Perspective view of the vane of the same compressor

[Figure 3] Enlarged view of part A in Figure 1

[Figure 4] Cross-sectional view of a conventional rotary compressor

[Figure 5] Front view of the vane of the same compressor

[Explanation of symbols]

51 Vane 54 Oil supply hole 65 cylinder 67 Main bearing 68 Secondary bearing 69 Roller 71 Slit 72 Spring

Claims (1)

[Claims] 1. A motor having a stator and a rotor in a sealed case, a cylinder containing oil, a compression chamber formed concentrically with the rotation center of the motor and having a slit, and a crankshaft having an eccentric portion in the cylinder. , a main bearing and a sub-bearing that pivotally support the crankshaft and seal both end surfaces of the cylinder; a roller attached to an eccentric portion of the crankshaft; and an outer periphery of the roller that is loosely passed through the slit and has an arcuate end. A hot water supply hole comprising a vane that contacts a surface and a spring that presses the vane against a roller, one end of which opens and communicates with the opposite side of the arcuate surface of the vane, and the other end of which opens and communicates with the side surface of the vane that faces the main and sub-bearing surfaces. A rotary compressor with