To provide a water-lubricated type screw fluid machine that has long life span of a shaft seal device and can identify or foresee the shaft seal device and can correctly notify an operator of the device.
The screw fluid machine 1 has a first non-contact seal 16, a second non-contact seal 17 and a lip seal 18 disposed between a rotor chamber 3 and a bearing 11 for a rotor shaft 7 located on the high pressure side, and in this order from a side of the rotor chamber 3. It includes: a pressurized communicating channel 24 for introducing high-pressure target gas into a pressurized space 20 formed between the first and second non-contact seals 16, 17; a pressurized pressure detecting device 32 for detecting a pressure P1 of the pressurized space 20, and an alarm device 33 for generating an alarm when a value P1 detected by the pressurized pressure detecting device 32 is out of a predefined range of pressurized pressure.
JP2004003602A | 2004-01-08 | |||
JP2009287413A | 2009-12-10 |
US3975123A | 1976-08-17 |
山田 卓二
田中 光雄