| 摘要 |
PURPOSE:To confirm the state of operating bearings by calculating the loads on the bearings from the oil film pressure on the sliding surfaces of the bearings. CONSTITUTION:An orifice 11 with a small diameter which is communicated to a hole 10 is formed in the bearing 2. A pan 13 wherein a pressure sensing hole 6 is formed is provided in the hole 10, and a temperature sensor 14 is fixed to the pan 13. The pressure oil which transmits the oil film pressure is transmitted to a pressure sensor 17 via the orifice 11. Number of rotations N is sensed by a sensor 18a, and inputted to an RPM judging device 51. The output signal thereof is inputted to a bearing-load calculated value store 52 comprising a low-speed-reference calculated value store 53 and a high-speed-reference calculated value store 54. The output from the store 52 is inputted to a reference-calculated-value calibrating device 55, where the reference calculated value is calibrated to the value which matches the actual state of the bearing, corresponding to the actual metal temperature and pressure measured by the oil film sensor 17 and the bearing metal temperature sensor 14. After the calibration, the bearing load is calculated by a load calculator 56, and the result is transmitted to a warning display 57. |
