JPS62117286U

JPS62117286U -

Info

Publication number: JPS62117286U
Application number: JP404486U
Authority: JP
Priority date: 1986-01-17
Filing date: 1986-01-17
Publication date: 1987-07-25

Description

[Brief explanation of the drawing]

第１図は本考案に係るコンプレツサの軸受け構
造を示す模式図であつて、シヤフトとベアリング
部との間に油膜が形成されている状態を示す図、
第２図は同様に本考案に係るコンプレツサの軸受
け構造を示す模式図であつて、シヤフトに装着さ
れている環状部材とベアリング部とが接触してい
る状態を示す図、第３図はコンプレツサを一般的
に示す断面図、第４図は従来のコンプレツサの軸
受け構造を示す模式図であつて、シヤフトとベア
リング部との間に油膜が形成されている状態を示
す図である。１……コンプレツサ、３，２０……シヤフト、
４……ロータ、７，８，１６，１７……プレーン
ベアリング部、１８……軸受け面小径部、１９…
…軸受け面大径部、２１……環状部材。 FIG. 1 is a schematic diagram showing the bearing structure of a compressor according to the present invention, and shows a state in which an oil film is formed between the shaft and the bearing part,
FIG. 2 is a schematic diagram showing the bearing structure of the compressor according to the present invention, and shows a state in which the annular member attached to the shaft and the bearing part are in contact with each other, and FIG. FIG. 4, which is a general sectional view, is a schematic diagram showing the bearing structure of a conventional compressor, and shows a state in which an oil film is formed between the shaft and the bearing part. 1... Compressor, 3, 20... Shaft,
4... Rotor, 7, 8, 16, 17... Plain bearing part, 18... Bearing surface small diameter part, 19...
... large diameter portion of bearing surface, 21 ... annular member.

Claims

[Scope of utility model registration request]

In a bearing structure for a compressor that includes a shaft of a rotor mounted on a compressor and a plain bearing portion that supports the shaft in the radial direction of the shaft, a bearing surface small diameter portion and a bearing surface large diameter portion are formed in the plain bearing portion. On the other hand, an annular member made of a self-lubricating resin such as fluororesin is attached to a portion of the shaft corresponding to the large diameter portion of the bearing surface, and the diameter of the annular member is formed to be larger than the small diameter portion of the bearing surface. A compressor bearing structure characterized in that the distance between the shaft and the small diameter portion of the bearing surface is larger than the distance between the large diameter portion of the bearing surface and the annular member.