JPS6123394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a two-cylinder rotary compressor. A conventional two-cylinder rotary compressor supplies lubricating oil to a hollow part formed by a rotating shaft and rollers by the pumping action of the rotating shaft, and uses the clearance of the rollers to distribute the lubricating oil in the hollow part. The oil is supplied into the cylinder to lubricate the inner wall of the cylinder and the contact area between the roller and vane to prevent wear due to lack of oil. However, lubricating oil is supplied into the cylinder from the hollow part through the roller clearance, so if you try to increase the amount of oil supplied by increasing the clearance, high-pressure gas will leak to the low-pressure side and the refrigeration capacity will drop significantly. I had a problem. An object of the present invention is to reduce mutual wear by supplying lubricating oil to the contact portion between the roller and the vane without reducing the refrigerating capacity.

According to the present invention, a hole is provided in the vane periphery of the partition plate located between the upper and lower cylinders, and the hole is provided vertically through the partition plate to supply oil to the contact portion between the roller and the vane.

The present invention will be described below with reference to embodiments shown in the drawings.

Reference numeral 1 denotes a cylindrical case in which lubricating oil 2 is stored at the bottom thereof, and a partition plate 4 through which a rotating shaft 3 driven by an electric motor (not shown) is inserted is fixed by press-fitting into the case. Reference numerals 5 and 6 denote two cylinders disposed on both the upper and lower sides of the partition plate 4. Inside each cylinder are rollers 9 and 10 attached to the eccentric portions 7 and 8 of the rotating shaft 3, and rollers that come into contact with the rollers. It houses sliding vanes 11 and 12, respectively. The vane 11
is held in the vane storage portion 14 via a coil spring 13 and cooperates with the eccentric rotation of the roller 9 to divide the inside of the cylinder 5 into a high pressure chamber 15 and a low pressure chamber 16. It should be noted that the vane 12 also cooperates with the roller 10 to perform the same function, but its explanation in the drawings is omitted. 17 and 1
8 is an upper bearing and a lower bearing. Reference numeral 19 denotes a through hole bored in the partition plate 4, and the through hole is provided with one of the vanes 11 and 12 of the upper and lower cylinders 5 and 6, for example, the vane 11, on the high pressure chamber 15 side near the vane storage portion 14. When approaching the center of the rotating shaft 3, a hollow formed by the high pressure chamber 15 side of the vane 11, the inner periphery of the roller 10 located in the cylinder 6 on the opposite side across the partition plate 4, and the rotating shaft 3. The portion 20 is communicated with each other. An oil supply hole 21 for the rotary shaft 3 is opened in the hollow portion 20 .

Therefore, the lubricating oil 2 forcibly supplied from the oil supply hole 21 by the rotation of the rotary shaft 3 is stored in the hollow portion 20 . The lubricating oil 2 stored in the hollow part 21 passes through the through hole 19 to the cylinders 5 and 5.
It is ejected to the high pressure chamber side of the rollers 9, 10 and the vanes 11, 12 to lubricate the contact areas between the rollers 9, 10 and the vanes 11, 12, thereby reducing mutual wear.

As described above, the two-cylinder rotary compressor according to the present invention has a cylindrical case in which lubricating oil is stored at the bottom, a partition plate through which a rotating shaft is inserted, and a partition plate through which a rotating shaft is inserted. Two upper and lower cylinders are provided that house a roller attached to the roller and a vane that contacts the roller, and one of the vanes of the upper and lower cylinders is placed at the center of the rotation axis on the high pressure chamber side near the vane housing portion of the partition plate. A through hole is provided that communicates the high pressure chamber side of the vane with the hollow part formed by the inner periphery of the roller located in the cylinder on the opposite side of the partition plate and the rotating shaft when approached, and the hollow part is connected to the high pressure chamber side of the vane. is made by opening the oil supply hole of the rotating shaft, so the lubricating oil discharged into the hollow part by the rotation of the rotating shaft is alternately ejected from the through hole to the high pressure chamber side of the upper and lower cylinders, and the contact area between the roller and vane. lubricating oil is better, and wear is reduced.

[Brief explanation of the drawing]

1 is a cross-sectional view of a main part of a two-cylinder rotary compressor according to the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA in FIG. DESCRIPTION OF SYMBOLS 1... Cylindrical case, 3... Rotating shaft, 4... Partition plate, 5, 6... Cylinder, 9, 10... Roller, 11, 12... Vane, 20, 20... Hollow part, 19... ...Through hole, 21, 21...Oil supply hole.

Claims (1)

[Claims] 1 A partition plate into which a rotating shaft is inserted is arranged in a cylindrical case in which lubricating oil is stored at the bottom, and a roller attached to each eccentric part of the rotating shaft and a vane in contact with the roller are arranged on both sides of the partition plate. Two cylinders, upper and lower, are installed, and when one of the vanes of the upper and lower cylinders approaches the center of the rotating shaft on the high-pressure chamber side near the vane storage part of the partition plate, the high-pressure chamber side of this vane and the partition plate A through hole is provided to communicate a hollow part formed by the inner periphery of the roller and the rotating shaft located in the cylinder on the opposite side of the roller, and the hollow part is provided with an oil supply hole for the rotating shaft. Features a two-cylinder rotary compressor.