JPH03185292A - Sealed rotary compressor - Google Patents

Abstract

PURPOSE:To enhance the effect of oil feed and that of sealing for a rotary compressor by forming in that surface of a partition panel which slides in a partition channel a number of oil storage grooves at intervals and in succession in the direction perpendicular to that in which the partition panel slides, the partition panel partitioning the inner space of a cylinder into a compression chamber and a suction chamber. CONSTITUTION:A partition panel 10 is forced to reciprocate within a partition channel 11 by rotation of a piston 6. In this case the partition panel 10 receives facial pressure in predetermined directions; the suction-chamber side wall surface 14 of the panel 10 is pressed against a wall surface 17 which is near the center of a cylinder 7 and the compression-chamber side wall surface 15 against a wall surface 18 which is far from the center of the cylinder 7. In the partition panel 10 a number of oil storage grooves 16 are formed at intervals and in succession in the direction perpendicular to that in which the panel 10 slides. As well as to each wall surface 14, 15 oil can be fed in a sufficient amount to each wall surface 17, 18 against which the partition panel 10 is pressed. Alternate vortexes are generated in the oil storage grooves 16 so as to prevent refrigerant gas inside and outside the cylinder 7 from leaking.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic rotary compressor constituting a refrigeration cycle.

BACKGROUND OF THE INVENTION In recent years, hermetic rotary compressors have been widely used in the field of refrigeration equipment.

An example of a conventional hermetic rotary compressor will be described below with reference to the drawings. The 4th fixed rotation and the 5th figure are JP-A-63
This is a conventional hermetic rotary compressor disclosed in Japanese Patent No. 189681. In FIG. 4, 1 is a hermetic rotary compressor, 2 is a hermetic container, and 3a is a stator, which is fixed to the hermetic container 2 by shrink fitting. A rotor 3b is connected to the crankshaft 4 and constitutes an electric motor 6. 6 is a piston, and 7 is a cylinder. 8 is the end plate A on the rotor side
, is welded to the closed container 2, and 9 is an end plate B at the end of the shaft, which is fixed to a bearing A8 on the rotor side via the cylinder 7 and closes both end surfaces of the cylinder 7.

In FIG. 5, the cylinder 7 is the same as the cylinder 7 shown in FIG. 4, and the piston 6 is also the same. 1
A partition plate 0 is housed in the partition plate groove 11 and divides the inside of the cylinder 7 into a suction chamber 12 and a compression chamber 13. Partition plate groove 11
There is an oil sump groove 1 on the side wall surface 14 of the suction chamber and the side wall surface 16 of the compression chamber.
6 are formed perpendicularly to the operating direction of the partition plate.

Reference numeral 17 indicates a wall surface near the center of the cylinder on the side wall surface 14 of the suction chamber, and reference numeral 18 indicates a wall surface far from the center of the cylinder 7 on the side wall surface 16 of the compression chamber.

When the above configuration is pressed and the piston 6 is rotated in the direction of the arrow, the partition plate 10 follows the movement of the piston 6 and reciprocates in the direction of the arrow at high speed. At this time, partition plate 1o
Because the cylinder reciprocates while being subjected to surface pressure in the direction shown by the open arrow, the oil film thickness on the wall surface 17 near the center of the cylinder 7 and the wall surface 18 farther from the center of the cylinder 7 is thinner, which has a negative effect on wear. In order to prevent this and ensure a sufficient oil film thickness, oil sump grooves 16 are provided, and by forming them continuously at arbitrary intervals, a labyrinth seal effect as shown in Fig. 6 can be obtained. This prevents leakage of refrigerant gas, etc. from inside and outside the cylinder.

Problems to be Solved by the Invention However, with the above configuration, if the force applied to the partition plate 10 in the direction of the white arrow becomes excessive, the wall surface 17 near the center of the cylinder in the partition plate groove 11 supporting the partition plate 10 There was a problem in that it was inevitable that the surface pressure on the far wall surface 18 would increase and the oil film thickness would become thinner.

In view of the above problems, the present invention is capable of supplying sufficient oil to the wall surface within the partition plate groove 11 to maintain the oil film thickness even when the force applied to the partition plate 10 in the direction of the white arrow becomes excessive. ,
The present invention provides a hermetic rotary compressor having a partition plate lubrication mechanism capable of preventing leakage of refrigerant gas, etc. from inside and outside the cylinder.

Means for Solving the Problems In order to solve the above-mentioned problems, the hermetic compressor of the present invention has oil reservoir grooves in the partition plate that are continuous at arbitrary intervals in a direction intersecting the sliding direction of the partition plate. This structure provides a sufficient oil film between the partition plate and the partition plate groove, and prevents leakage of refrigerant gas, etc.

Function The present invention has an oil reservoir groove formed in the partition plate that operates according to the above-described configuration, so that the wall surface of the partition plate groove that supports the partition plate with high surface pressure can also be sufficiently supplied with oil. Since the oil reservoir grooves are continuously formed at arbitrary intervals, sufficient rinsing properties can be obtained due to the labyrinth seal effect.

EXAMPLE Hereinafter, a hermetic compressor according to an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those of the conventional example will be explained using the same symbols, and parts that are the same in structure and operation will be omitted.

Referring to FIG. 1, a piston 6 rotates inside the cylinder 7 to reciprocate the partition plate 10 between the suction chamber side wall surface 14 and the compression chamber side wall surface 15 of the partition plate groove 11, causing the partition plate 1o to take in the suction. Room side wall surface 14. On the surface facing the compression chamber side wall surface 15, oil reservoir grooves are continuously formed at arbitrary intervals in a direction intersecting the sliding direction.

Further, the partition plate 10 divides the inside of the cylinder 7 into a suction chamber 12. Compression chamber 1
It is divided into 3.

With the above configuration, when the piston 6 rotates in the direction of the arrow, the partition plate 10 follows the movement of the piston 6 and reciprocates in the direction of the arrow within the partition plate groove 11. At this time, partition plate 1
o receives surface pressure in the direction of the white arrow, and the suction chamber side wall surface 14 is pressed against the wall surface 17 near the center of the cylinder 7, and the compression chamber side wall 15 is pressed against the wall surface 18 far from the center of the cylinder 7.

However, since oil reservoir grooves 16 are continuously formed in the partition plate 10 at arbitrary intervals, the suction chamber side wall surface 14° is close to the center side where the partition plate 10 is pressed, similar to the compression chamber side wall surface 16. Wall surface 17. Sufficient oil can be supplied even to the wall surface 18 far from the center. Therefore, a sufficient oil film thickness can be obtained, and mechanical strength against wear is improved. Moreover, since the oil reservoir groove 16 is provided continuously, the suction chamber side wall surface 14 of the partition plate 10 and the partition plate groove 11 is formed as shown in FIG. The refrigerant gas inside and outside the cylinder that tries to leak through the gap between the side wall of the compression chamber 16 and the flow path is narrow or wide, causing alternating vortices in the oil sump groove and causing leakage. will be prevented. Therefore, the sealing performance of the refrigerant gas can be improved by the labyrinth seal effect similar to the conventional one, and a decrease in efficiency can be eliminated.

Effects of the Invention As described above, the present invention has oil reservoir grooves continuously formed at arbitrary intervals in the direction intersecting the sliding direction on the surface of the partition plate that slides on the partition grooves, so that the partition plate and the partition plate groove can be separated. Since sufficient oil can be supplied during this period and the thickness of the oil film can be ensured, mechanical strength against wear can be improved.

Improving the sealing effect can lead to improved compressor efficiency.

[Brief explanation of drawings]

FIG. 1 is a plan view of a rotary compressor according to an embodiment of the present invention, FIG. 4 is a sectional view of a general hermetic compressor, FIG. 5 is a sectional view of main parts of a conventional rotary compressor, and FIG. The figure is an enlarged sectional view of an oil sump groove of a conventional rotary compressor. 1... Sealed rotary compressor, 2... Sealed container, 6... Electric motor, 6... Piston, 7... Cylinder, 8... End plate A, 9
...End plate B, 10...Partition plate, 1...
...Partition plate groove, 6...Oil sump groove.

Claims (1)

[Claims] An electric motor and a compressor section driven by the electric motor are provided in a closed container, and the compressor section includes a cylinder, a piston that rotates inside the cylinder, and two types of end plates A for closing both end surfaces of the cylinder. Plate B and a partition plate groove provided in a radial direction with respect to the central axis of the cylinder, and the partition plate groove is slidably fitted into the partition plate groove, and one inner end abuts the outer periphery of the piston to open the internal space of the cylinder. comprising a partition plate that partitions the air into a compression chamber and a suction chamber, and further comprising a plurality of oil reservoir grooves formed at intervals in a direction intersecting the sliding direction on a surface of the partition plate that slides on the partition plate grooves. A hermetic rotary compressor.