JPS585110Y2 - Oil pump device for refrigeration compressor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil pump device for a refrigeration compressor, and its purpose is to forcibly supply lubricating oil to the bearing portion of the oil pump itself.

Conventional oil pump devices for refrigeration compressors supply pressurized lubricating oil to each sliding part and heat generating part to lubricate and cool them to prevent wear and temperature rise.
Since there is no device to forcibly lubricate the sliding parts of the oil pump itself, the sliding parts of the oil pump itself can wear out or lock up due to lack of lubricant, which lubricates the sliding parts and heating parts of the compression and electric elements. There was a problem where oil could not be supplied.

The basic configuration of this project is to install a compression element and an electric element in parallel,
An oil pump is provided at one end of a horizontal rotating shaft that connects the two elements, an oil groove communicating with the discharge side of the oil pump is provided in a plate held between the pump covers to which the oil pump is attached, and the oil groove is connected to the oil pump. The oil pump is characterized in that a small hole opposite to an oil hole that communicates with an oil reservoir provided in the center of the pump and supplies lubricating oil to the bearing of the oil pump is communicated with the oil reservoir.

With this configuration, a part of the lubricating oil pressurized by the oil pump that is supplied to each sliding part of the refrigeration compressor is supplied from the oil groove provided in the plate to the bearing part of the oil pump through the small hole, This prevents insufficient supply of lubricating oil to compression elements and electric elements due to wear or locking of the oil pump itself.

The present invention will be explained below based on the embodiment shown in the drawings.

1 is a semi-hermetic compressor, which has a crank chamber 3 housing a compression element 2 and a motor chamber 5 housing an electric element 4.
are divided into left and right by a partition wall 6, and the compression element 2
and the electric element 4 are connected by a horizontal rotating shaft 7, and the rotating shaft is supported by a bearing part 8 provided on the partition wall 6.

Reference numeral 9 denotes a communication hole bored at the lower end of the partition wall 6 so that the lubricating oil 10 stored in the lower part can be moved between the crank chamber 3 and the motor chamber 5.

Reference numeral 11 denotes an oil pump provided at one end of the horizontal rotary shaft 7, and the oil pump has a frame 12 integrally formed with the partition wall 6.
an external gear 14 inserted into a lid body 13 that closes off an internal gear, an internal gear 15 inserted into the external gear, a shaft 16 attached to the internal gear and connected to the rotating shaft 7, and a shaft 16 that supports the shaft. A bearing part 17 integrally formed with a lid body 13 and a lubricating oil 1
A plate 2 having a rotary plate 18 for switching the flow path of 0, and an inlet port 19 and a discharge port 20 that appropriately communicate with the flow path of the rotary plate.
1, an inflow reservoir 22 that communicates between the lubricating oil 10 stored in the lower part and the suction port 19, and an outflow port that communicates with the discharge port 20 and the supply hole 23 that supplies the sliding parts and heat generating parts of the rotating shaft 7. The pump cover 26 has an outflow reservoir 25 communicating with the passage 24.

27 is a lubricating oil return hole. Therefore, 28 is plate 2
1, and the oil groove communicates between the discharge port 20 of the plate 21 and the oil reservoir 29 provided at the center of the rotating body 18.

Reference numeral 30 denotes a small hole communicating with the oil reservoir 29, and the small hole is provided opposite to the oil hole 31 formed in the shaft 16 that supplies lubricating oil 10 to the bearing portion 17 formed in the lid body 13. ing.

In the oil pump device for the refrigeration compressor configured as described above, the oil pump 11 driven by the rotating shaft 7 rotated by the operation of the electric element 4 transfers the lubricating oil 10 stored in the lower part to the inflow reservoir of the pump cover 26. 22 from the inlet port 19 of the plate 121 between the meshing of the external gear 14 and the internal gear 15 and pressurize it, and then from the outlet port 20 of the plate 2t to the outflow reservoir 25 of the pump cover 26 to the outflow passage 24. A rotating shaft 7 that flows out into the flow path and passes through the outflow passage as appropriate.
The oil is supplied from the oil supply hole 23 to each sliding part and heat generating part.

Lubricating oil 1 discharged from the discharge port 20 of the plate 21
A part of the oil flows into the oil reservoir 29 of the rotating body 18 from the oil groove 28 carved in the plate, and flows into the oil hole 31 bored in the shaft 16 of the oil pump 11 through a small hole 30 communicating with the oil reservoir. Guide the lubricating oil 10 to the shaft 1
6 is lubricated to prevent insufficient supply of lubricating oil 10 to compression element 2 and electric element 4 due to abrasion or locking of oil pump 11 itself.

As described above, the present invention is a refrigeration compressor in which a compression element and an electric element are arranged side by side, and an oil pump is provided at one end of a horizontal rotating shaft that connects the two elements. The plate is provided with an oil groove that communicates with the discharge side of the oil pump, and the oil groove communicates with an oil reservoir provided in the center of the oil pump and faces an oil hole that supplies lubricating oil to the bearing of the oil pump. Since a small hole is connected to the oil reservoir, a portion of the lubricating oil pressurized by the oil pump is reliably transferred from the oil groove provided in the plate to the bearing of the pump through the small hole. It has practical effects such as forced lubrication to supply lubricating oil to the refrigeration compressor, prevents wear and locking of the oil pump itself, and reliably supplies lubricating oil to each sliding part and heat generating part of the refrigeration compressor. There is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a semi-hermetic compressor showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of section A in FIG. 2... Compression element, 4... Electric element 1.
7...Horizontal rotating shaft, 11...Oil pump, 21...Plate, 26...Pump cover 28...Oil groove, 29・・・・・・
...Oil reservoir, 30...Small hole.

Claims (1)

[Scope of utility model registration request] In a refrigeration compressor in which a compression element and an electric element are arranged side by side and an oil pump is provided at one end of a horizontal rotating shaft that connects the two elements, the oil pump is mounted on a plate held between a pump cover to which the oil pump is mounted. An oil groove communicating with the discharge side of the oil pump is provided, and a small hole opposite to the oil hole for supplying lubricating oil to the bearing part of the oil pump is provided. An oil pump device for a refrigeration compressor, characterized in that it communicates with an oil reservoir.