JPH0242191A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To surely prevent the infiltration of a foreign object into a sliding face by communicating a space formed between a shaft end face and a cover to a space outside the cover via a passage in a compressor closing one end of a bearing sliding a shaft with the cover. CONSTITUTION:The lubricating oil 15a sucked through an oil sucking piece 12 is boosted by the reciprocating motion of vanes 13 in contact with the outer periphery of a roller 9 when the eccentric roller 9 is rotated by a motor 6. This lubricating oil 15a is guided to an oil groove 7c on the outer periphery of a shaft 7 from an oil feed pipe 14a via an oil hole 7a and a horizontal hole 7b to lubricate a sliding section. In this case, a small hole 24b communicated to the vicinity of the bottom of the inner wall face of a sub-bearing 20 is formed on a cover 24. When a foreign object such as a spatter 16 flows into an oil sump section 7d from the oil groove 7c together with the lubricating oil 15a, it can be discharged to the outside. A recess 20a is provided on the bottom of the inner wall face of the sub-bearing 20, this recess 20a is communicated to the small hole 24b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a horizontal rotary compressor, and particularly to a horizontal rotary compressor suitable for improving the reliability of sliding parts.

[Background of the invention]

A conventional compressor will be explained with reference to FIGS. 3, 4, and 5. FIG. 3 is a sectional view of a conventional compressor described in Japanese Patent Application Laid-Open No. 60-30495.

In the figure, oil 15 is collected at the bottom of case 1 due to the pump action caused by the reciprocating movement of vane 13.

The oil is sent from the oil suction piece 12 to the oil hole 7a provided in the center of the shaft 7 via the oil supply pipe 14a.

Here, the end face of the sub-bearing 10 (bearing) is covered by the cover 1.
The structure is such that the lubricating oil is blocked at 4 and 5 a is held. The lubricating oil 15a sent to the oil hole 7a is transferred to the side hole 7b.
The oil is then sent to an oil groove 7c provided on the outer diameter of the shaft 7 to lubricate the outer circumference of the shaft 7, thereby exerting the desired lubrication effect. The oil groove 7c is divided into the bearing of the frame 4 and the sub-bearing 10, and the lubricating oil 15a sent to the sub-bearing 10 returns to the oil hole 7a again. Such a structure has an excellent lubrication effect because the oil groove 7c can be set at a position away from the direction of the load applied to the shaft. Further, even when an oil groove is provided on the side of the bearing, it is common to similarly provide the oil groove at a position away from the load direction of the shaft. FIG. 5 is a sectional view of a main part of a conventional bearing disclosed in Japanese Patent Application Laid-Open No. 56-88989. The figure shows an example in which the end face of the bearing is covered with a cover.

However, the compressor with this structure has the following points that should be improved. That is, the case 1 and the lid 2 are sealed by the welding part 3, but during welding, hard metal spheres of several microns to several hundred microns, generally called spatter, are scattered, and some of the spatter 16 is in the case 1. There was a case of intrusion inside.

In addition to spatter, there were also small amounts of chips, dust, etc. that could damage the sliding parts, and they sometimes reached the Urayasu 7a of the shaft 7 from the oil supply pipe 14a together with the lubricating oil 15a. To explain the conventional bearing with reference to FIG. 4, the horizontal hole 71
) into the oil groove 7c, the spatter 16 enters the oil groove 7c from the frame 4.
The side returns to the inside of the case 1 together with the lubricating oil L5a, but the spatter 16 that has entered the sub-bearing 10 side is absorbed by the shaft 7.
There was a problem that it was easy to accumulate at the edges. Sunao] Chi,
cover 14, end of shaft 7 and sub-bearing 10
As the shaft 7 rotates, the oil in the oil reservoir 7d also rotates, so that centrifugal force is generated in the oil reservoir 7d surrounded by the inner wall of the oil groove 7C. The spatter 16 that has reached the Urayasu 7 of the shaft 7 is caused by centrifugal force.
Since it is difficult to enter a, the amount remaining in the i* reservoir gradually increases, and there is a risk of a locking accident between the shaft 7 and the sub-bearing 10. Conventional countermeasures for this problem include removing foreign matter such as spatter 16 as much as possible and installing a filter on the oil suction piece. It was necessary to create a structure that would prevent the shaft from being easily damaged.

(Object of the Invention) An object of the present invention is to provide a highly reliable horizontal rotary compressor.

[Summary of the invention]

In order to achieve this purpose, the bearing is equipped with a passage for discharging foreign matter together with lubricating oil from the first moving part into a space formed between the shaft end and the cover, and discharging the foreign matter together with the oil outside the cover. It is something.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3. motor 6 inside the case].

A compression element consisting of a frame 4, a shaft 7, a cylinder 8, a roller 9° sub-bearing 20, a vane 13, etc.
The structure is such that oil 15 is stored, the lid 2 and the case 1 are sealed at a welding part 3, and the frame 4 and the case 1 are fixed at a welding part 5. How does a compressor work?

The rotation of the motor 6 is transmitted to the roller 9 by the shaft 7, and the roller 9 rotates inside the cylinder 8 to perform the desired compression work. 3 vanes 1; 3 are attached to the outer peripheral surface of the roller 9. The back surface of the vane 13 simultaneously draws oil 5 from the oil suction piece 12 into the oil supply pipe 1.
It functions to send to 4a.

The lubricating oil 1.5a flows from the oil supply pipe 4a through the Urayasu 7a provided at the center of the shaft 7, and reaches the oil groove 7c provided on the outer periphery of the shaft 7 from the horizontal hole 7b, thereby providing the desired lubrication. It is effective. The compressor of the embodiment will be described with reference to FIG. 2. The cover 24 is provided with a small hole 24b that communicates with the vicinity of the bottom of the inner wall surface of the sub-bearing 20. When a small amount of foreign matter such as spatter 16 present at the bottom of the case 1 flows into the oil reservoir 7d from the oil groove 7c together with the lubricating oil 15a, it can be discharged to the outside through the small hole 24b. Further, a four part 20a is provided at the bottom of the inner wall surface of the sub-bearing 20, and a four part 20a is provided in the recessed part 20a.
By communicating the small holes 24b, foreign matter such as spatter 16 that has fallen onto the fourth part 20a can be discharged together with the lubricating oil. In addition, lubricating oil 1.5a also leaks from the small hole 24b, so if there is insufficient lubricating oil to the sliding parts, use a part of the oil supply pipe 24a provided in the cover 24 or a separate part to drain the oil supply pipe 24. ? The vibrator 24 connected to the top (the second is connected to the shaft 7
By inserting the lubricating oil 15a into a vertical hole (Urayasu 7a) provided in the axial direction at the center of the lubricating oil 15a, it is possible to prevent the lubricating oil 15a from leaking more than necessary due to the centrifugal force generated in the oil reservoir 7d.

〔Effect of the invention〕

According to the present invention, foreign matter such as spatter, which could damage the sliding part and cause a shaft locking accident, can be effectively removed from the sliding part, thereby improving the 4fj reliability of the compressor. There is an effect that says it can be done.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the compressor of the present invention, FIG. 2 is a detailed sectional view of the Δ section of FIG. 1, and FIG. 3 is a longitudinal sectional view of a conventional compressor.
FIG. 4 is a detailed sectional view of part 0 of FIG. 3, and FIG. 5 is a partial sectional view of another conventional compressor. 1...Case, 2...Lid, 3...Welded part, 4...
・Frame, 5... Welding part, 6... Motor, 7...
・Shaft, 7a... Urayasu, 7b... Side hole, 7c.
...Oil groove, 7d...Oil reservoir, 8...Cylinder, 9
...Roller, 10...Sub bearing, 1: U...
・Vane, 14...Cover 1451...Oil supply pipe, 1
5...Oil, i5a...Lubricating oil, 16...Spatter, 20...Sub bearing. 20d... recess, 24... cover, 24 a...
Oil supply pipe, 24b...small hole, 24c...pipe. T-J+

Claims (1)

[Claims] 1. In a horizontal rotary compressor with a cover that closes one end of the bearing and a shaft that is slidably supported on the bearing,
A horizontal rotary compressor comprising: a space formed between the shaft end face and the cover; and a passageway communicating the space with the space outside the cover.