JPS6226384A - Enclosed compressor - Google Patents

Abstract

PURPOSE:To eliminate spatter and abrasive iron powder efficiently thus to prevent abnormal abrasion and biting at the sliding section by inserting a magnet ring to a portion of shaft of lubricating mechanism for sucking the refrigerator oil from the lower section and feeding to the sliding face. CONSTITUTION:A motor element 2' and a compression element 3' are arranged respectively at the upper and lower section of an enclosed container 1' while the refrigerator oil 4' is stored at the bottom. A magnet ring 9 is inserted into the inner hole at the lower end of shaft 8' for sucking the refrigerator oil 4' from the lower section to feed to the sliding face. Since the refrigerator oil 4 containing the welding spatter and the abrasive iron powder at the sliding section will pass near the magnet ring G without fail upon being sucked through the lower end of shaft 8', the catching rate is improved considerably to prevent the iron foreign matter from going to the sliding section thus to protect the sliding face from damage resulting in improvement of reliability.

Description

Detailed Description of the Invention [Field of Application of the Invention] - The present invention relates to a hermetic compressor, and particularly to a hermetic compressor suitable for collecting iron-based foreign matter.

[Background of the invention]

A conventional hermetic compressor will be explained with reference to FIG.

An electric element is disposed at the upper part of the closed container, a compression element is disposed at the lower part, and refrigeration oil 4 is stored at the bottom. The closed container top is formed by welding a container top 5 and a container bottom 6. Spatter generated from the weld is collected by a magnet 7 held under the container. In this structure, spatter generated by welding and iron powder worn on sliding parts settle or float in the refrigerating machine oil 4, and some of it is collected by the magnet 7, but some of it is sucked in through the inner hole of the shaft 8. Since only a portion of the refrigerating machine oil 4 supplied to the sliding portion passes near the magnet 7, most of the spatter and iron-based foreign matter such as iron powder worn by the sliding portion pass through the sliding portion. As the refrigerating machine oil 4 circulates, iron-based foreign matter is gradually collected by the magnet 7 (or, by passing through the sliding part before being collected, the sliding part is damaged, causing abnormal wear and galling. The drawback was that it could cause problems.

For example, Japanese Utility Model Publication No. 54-33123 is related to this type of hermetic compressor.

[Purpose of the invention]

An object of the present invention is to provide a hermetic compressor that can efficiently remove iron-based foreign substances such as spatter and worn iron powder and prevent abnormal wear and galling of sliding parts.

[Summary of the invention]

The reason why the collection efficiency of iron-based foreign matter is low is because the structure is such that only a part of the refrigerating machine oil 4 supplied to the sliding parts passes near the magnet 7, and the refrigerating machine oil supplied to the sliding parts If the structure is such that all of the magnets 4 pass near the magnet 7, the collection efficiency will be significantly improved. The present invention has been devised based on this idea.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. Identical numbers indicate identical parts.

An electric element l' is placed in the upper part of the closed container 1', and a compression element l is placed in the lower part.
', and refrigerating machine oil 4' is stored at the bottom.

A ring-shaped magnet 9 is inserted into the inner hole at the lower end of the shaft 8'. According to this structure, when the refrigerating machine oil 4 containing iron-based foreign substances such as spatter during welding and iron powder worn on sliding parts is sucked in from the lower end of the shaft 8', it always passes near the ring-shaped magnet 9, so that the collection rate is high. is extremely high, and iron-based foreign matter does not reach the sliding part, preventing damage to the sliding surface and improving reliability.

In the present invention, if the inner diameter of the ring-shaped magnet 9 is made larger than the inner diameter of the shirt F8', it will not hinder the rise of the refrigerating machine oil 4', and iron-based foreign matter will accumulate in the drawn-in area. The flow of the refrigerating machine oil 4' is no longer obstructed by the accumulation of iron-based foreign matter.

Furthermore, by attaching the non-magnetic material 10 to the outer diameter of the ring-shaped magnet 9, it is possible to reliably prevent the magnetic force from spreading to undesired locations and preventing ferrous foreign matter from attaching to unspecified locations.

In addition, when installing an iron-based oiler 11, the oiler 11
It is also possible to integrate the ring-shaped magnet 9 and the oil supply device 11 by magnetizing the upper part 12 of the ring-shaped magnet 9, thereby reducing the number of parts.

〔Effect of the invention〕

According to the present invention, iron-based foreign matter such as spatter and worn iron powder can be removed by
Since it can be efficiently removed from the refrigerating machine oil 4' supplied to the sliding parts, it is possible to prevent damage to the sliding surfaces due to iron-based foreign substances and abnormal wear and galling that develop from there, resulting in improved reliability. There is.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hermetic compressor according to an embodiment of the present invention;
2 to 4 are longitudinal sectional views of a structure for collecting iron-based foreign matter in a hermetic compressor according to another embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of a conventional hermetic compressor. 1.1゛...Airtight container, z, I...Electric element, 1.
Dan'... Compression element, 4.4'... Refrigerating machine oil, 5...
・Container top, 6...Container bottom, 7...Magnet, 8.8'・
... Shaft, 9 ... Ring-shaped magnet, 10 ... Non-magnetic material, 11 ... Oil supply device, 12 ... Upper part.寥 1 口寥2 fig stem 41!1 ￥;5 fig.

Claims (1)

[Claims] A hermetic compressor has an oil supply structure in which an electric element is arranged in the upper part of a hermetic container, a compression element is arranged in the lower part, refrigerating machine oil is stored at the bottom, and the refrigerating machine oil is sucked in from the lower end of the shaft and supplied to the sliding surface. A hermetic compressor characterized by a ring-shaped magnet inserted into a portion of the shaft.