JPH0313487U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案スクリユ圧縮機の横断面図、第
２図は縦断面図、第３図は他の実施例の要部断面
図、第４図はその正面概略図、第５図は第３図の
横断面図、第６図は従来例の概要図である。 ３……おすロータ、４……めすロータ、８……
吐出側軸受室、１２……回収路、１７……絞り、
１８……吸入側軸受室、２３……ラビリンスシー
ル。 Fig. 1 is a cross-sectional view of the screw compressor of the present invention, Fig. 2 is a longitudinal sectional view, Fig. 3 is a sectional view of main parts of another embodiment, Fig. 4 is a schematic front view thereof, and Fig. 5 is a longitudinal sectional view. 3 is a cross-sectional view, and FIG. 6 is a schematic diagram of a conventional example. 3...Male rotor, 4...Female rotor, 8...
Discharge side bearing chamber, 12... Recovery path, 17... Throttle,
18... Suction side bearing chamber, 23... Labyrinth seal.

Claims (1)

【実用新案登録請求の範囲】 (1) 互いに噛み合い回転するおす・めす一対の
スクリユロータをケーシング内に収容した油冷式
スクリユ圧縮機において、該圧縮機の吐出側軸受
室からの潤滑油回収路を前記ロータのシール線に
よつて仕切られる吸入閉じ込み後の作動空間に相
当するシリンダ壁に開口すると共に、駆動軸とな
るスクリユロータの吸入側軸受室を圧縮作用空間
への油噴射通路と接続し、さらに該軸受室と連通
する油路には絞りを設け、かつ吸入作用空間側の
軸部には軸封装置を設けたことを特徴とする油冷
式スクリユ圧縮機。 (2) 互いに噛み合い回転するおす・めす一対の
スクリユロータをケーシング内に収容した油冷式
スクリユ圧縮機において、該圧縮機の駆動軸とな
るスクリユロータの吸入側軸受室を圧縮作用空間
への油噴射通路と接続し、さらに該軸受室と連通
する油路には絞りを設け、かつ吸入作用空間側の
軸部には軸封装置を設けたことを特徴とする油冷
式スクリユ圧縮機。 (3) 互いに噛み合い回転するおす・めす一対の
スクリユロータをケーシング内に収容した油冷式
スクリユ圧縮機において、該圧縮機の被駆動側と
なるスクリユロータの吸入側軸受室と油噴射通路
間を軸受カバーのフランジ部に凹設した環状溝を
介して連通したことを特徴とする油冷式スクリユ
圧縮機。[Scope of Claim for Utility Model Registration] (1) In an oil-cooled screw compressor in which a pair of male and female screw rotors that mesh with each other and rotate are housed in a casing, a lubricating oil recovery path from a bearing chamber on the discharge side of the compressor is provided. It opens in the cylinder wall corresponding to the working space after suction confinement partitioned by the seal line of the rotor, and connects the suction side bearing chamber of the screw rotor serving as the drive shaft with the oil injection passage to the compression working space, The oil-cooled screw compressor is further characterized in that an oil passage communicating with the bearing chamber is provided with a restriction, and a shaft portion on the suction action space side is provided with a shaft sealing device. (2) In an oil-cooled screw compressor in which a pair of male and female screw rotors that engage and rotate with each other are housed in a casing, the suction side bearing chamber of the screw rotor, which serves as the drive shaft of the compressor, is connected to an oil injection passageway to a compression working space. An oil-cooled screw compressor, characterized in that an oil passage connected to the bearing chamber and communicating with the bearing chamber is provided with a restriction, and a shaft sealing device is provided on the shaft portion on the suction action space side. (3) In an oil-cooled screw compressor in which a pair of male and female screw rotors that mesh with each other and rotate are housed in a casing, a bearing cover is installed between the suction side bearing chamber of the screw rotor, which is the driven side of the compressor, and the oil injection passage. An oil-cooled screw compressor, characterized in that the flange portion of the oil-cooled screw compressor communicates with each other through an annular groove recessed in the flange portion of the compressor.