JPS6210494A - Sealed type rotary compressor - Google Patents

Abstract

PURPOSE:To certainly lubricate a vane and a vane groove by forming a hole for introducing the returned oil in a sealed container into a vane groove relief hole, onto an upper bearing, and forming an aslant surface having the hole at the lowest position onto the upper surface of the upper bearing. CONSTITUTION:The whole periphery of the outer peripheral part of an upper bearing 14 is fixed onto the inner wall of a sealed container 18, and a hole 21 for the communication to a cylinder vane groove relief hole 22 in the lower part is formed onto a part of the upper bearing 14. While, the upper surface of the upper bearing 14 is formed into an aslant surface from having the hole 21 at the lowest position. Therefore, the returned oil in the sealed container 18 is recovered into the cylinder vane groove relief hole 22, and the vane 20 and the vane groove can be certainly lubricated.

Description

[Detailed description of the invention] This invention relates to a lubrication structure for one groove.

show. In the figure, 1 is a stator and 2 is a rotor, both of which form an electric element. 3 is the shaft, 4 is the upper bearing,
5 is a lower bearing, 6 is a cylinder, and 7 is a piston, which form a compression element. 8 is a sealed container, 9 is refrigeration oil, 1
0 is a vane. The compressor element is welded and fixed to the closed container 8 through a portion extending from the cylinder 6.

During operation, lubrication of the vanes 10 and vane grooves mostly depends on the refrigerating machine oil 9 dripping at the bottom of the sealed container 8, and if the refrigerating machine oil level drops below the bottom surface of the cylinder, There was a problem in that the lubricity of the vane 1o and the vane groove deteriorated.

In view of the above-mentioned problems, the present invention provides a hermetic rotary compressor having a function of improving the lubricity of vanes and vane grooves.

Means for Solving the Problems In order to solve the above-mentioned problems, the hermetic rotary compressor of the present invention has the following features: The entire outermost circumference of the upper bearing is brought into contact with the inner surface of the hermetic container and welded. The compression element is fixed to the airtight container, and the upper bearing is provided with a hole of approximately the same size and shape as the cylinder vane groove hole, and the shape of the upper surface of the upper bearing is
The part where the hole is located is inclined so that it is the lowest part, and the cylinder vane groove hole is located directly below the upper bearing hole.

Effect The present invention has the above-mentioned configuration, and the inner wall of the closed container is attached to the inner wall of the closed container.
The refrigerating machine oil flowing at the bottom of the sealed container is collected on the top surface of the upper bearing,
Moreover, the collected refrigerating machine oil flows into the upper bearing hole due to the inclined structure of the upper surface of the upper bearing, and through this upper bearing hole,
Is the vane groove lubricated by reliable and large amount of supply to the cylinder vane groove? can be increased.

Embodiment Hereinafter, a hermetic rotary compressor according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 2 of the drawings.

FIG. 1 shows an overall view of a hermetic rotary compressor according to an embodiment of the present invention.

In the figure, 11 is a stator, and 12 is a rotor, both of which form an electric element. 13r/'i is a shaft serving as a crankshaft, 14 is an upper bearing, 15 is a lower bearing, 16 is a cylinder, and 17f'i is a piston, which together form a compression element. 18 is a closed container, and 19 is refrigerating machine oil.

FIG. 2 shows the rotor and compression element of the same compressor as viewed from the direction of arrow B in FIG. In the figure, 20 is a vane, 21 is a hole provided in the upper bearing 14, and a cylinder vane groove hole 22 is located directly below the hole. FIG. 3 shows the upper bearing 14 taken from C-C in FIG.
This is a sectional view taken in the direction of arrows, and the two surfaces of the upper bearing are inclined, and the hole 21 is the lowest part.

By operating the compression element by the electric element, the refrigerating machine oil 19 located at the bottom of the sealed container is stirred up together with the discharged gas, and most of it adheres to the inner wall of the sealed container and flows downward through the inner wall surface. The flow flows into the upper surface of the upper bearing 14, flows into the hole 21 due to the sloped structure of the upper surface of the upper bearing, and drips directly into the hole 22 of the cylinder vane groove. This improves the lubrication of the vane 20 and the vane groove.

It should be noted that even if the size of the hole is slightly changed from the size of this embodiment, a sufficient effect can be obtained.

Effects of the Invention As described above, the present invention fixes the compression element to the hermetic container by welding the entire outermost circumference of the upper bearing of the hermetic rotary compressor to the inner surface of the hermetic container. A hole with the same size and shape as the cylinder vane groove hole is provided,
And the shape of the upper surface of the upper bearing is set to t!, where the hole is located. By slanting the cylinder vane groove so that it is at its lowest point, and by positioning the cylinder vane groove groove directly below the upper bearing hole, the refrigerating machine oil that flows downward on the inner wall surface of the sealed container is directed to the upper surface of the upper bearing. Due to the inclined structure of the upper surface of the upper bearing, it is possible to flow into the hole and directly and effectively supply it to the cylinder vane groove hole, thereby significantly improving the lubricity of the vane and the vane groove.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hermetic rotary compressor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along arrow B in FIG.
The figure is a sectional view of the upper bearing 14 taken along the line C-C in FIG. 2, FIG. 4 is a sectional view of a conventional hermetic rotary compressor, and FIG. be. 11... Stator, 12 ・Rotor, 13...
...Shaft, 14. Upper bearing, 15. Lower bearing, 1.
6...Cylinder, 17...Piston, 18...
... airtight container, 19 ... refrigerating machine oil, 20 - ... vane, 21 ... hole, 22 - Cylinder vane groove hollow hole. Name of agent: Patent attorney Toshio Nakao and 1 other person1
1-Stator l? -Rotor/'/ I6 I2- +f' large on rotor Figure 3 Figure 4 Section 5

Claims (1)

[Claims] An electric element and a compression element are housed in a closed container to constitute a closed rotary compressor, and the compression element is connected to a crankshaft driven by the electric element and a piston rotatably fitted to the crankshaft. A vane that makes reciprocating motion with its tip in contact with the piston and divides the inside of the cylinder into a refrigerant suction chamber and a compression chamber, and upper and lower bearings that support the crankshaft and close both ends of the cylinder. The compression element is fixed to the sealed container by contacting and welding the entire outermost circumference of the upper bearing to the inner surface of the sealed container, and furthermore, the upper bearing is provided with a hole substantially equivalent to a cylinder vane groove. A hole with a size and shape of A hermetic rotary compressor.