| 摘要 |
PURPOSE:To stably supply sealing oil to a bearing oil sealing device with less discontinuity for a long period of time by providing coupling means which communicates only at an emergency time between the exhaust side of a recirculation oil pump and the exhaust side of a sealing oil pump of an ordinary conduit. CONSTITUTION:A conduit 24 which communicates via a check valve 23 is provided between the exhaust side of a recirculation oil pump 9 and the exhaust side of a sealing oil pump 7 of an ordinary conduit, a pressure regulating valve 22 is provided in a recirculation conduit at the exhaust side of the pump 9 and the controlling oil pressure pipe 25 of the valve 22 is connected to the ordinary conduit at the exhaust side of the pump 7. When the discharge pressure of the pump 7 is lowered, the valve 22 is operated in the closing direction by the pipe 25, the circulating amount to a vacuum tank 1 of the recirculating oil is recuced, thereby enhancing the exhaust pressure of the pump 7. Thus, the pump 9 allows to supply the sealing oil through the conduit 24 and the ordinary conduit to a bearing sealing device S. |
