| 摘要 |
PURPOSE:To improve the reliability by operating a protecting circuit on the basis of the temperature and flow rate of coolant of a bearing as well as physical values affecting the influence to the temperature of the bearings. CONSTITUTION:The outputs of a rotating speed detector 11, a coolant temperature detector 12 a coolant flow rate detector 13 and a bearing temperature detector 6 are respectively inputted through converters 14, 16, 17, 15 to the primary differentiators 18, 20, 21, 19, the outputs are inputted through the secondary differentiators 22, 24, 25, 23 to an arithmetic circuit 27, and inputted to an arithmetic circuit 26. The outputs of the arithmetic circuits 26, 27, the output of the converter 15 and the output of the differentiator 19 are respectively compared by comparators 28, 29, and the logic product of the outputs is taken by an AND gate 30 to operate a protecting circuit 10. |
