| 摘要 |
<p>PURPOSE:To surely detect a small oil spill irrespective of the season and power transmitting state by finding an ideal operating oil level in an oil tank from the temperature of an OF cable being operated and the oil tank and moving a lower oil level limit alarming sensor to the ideal oil level or an oil level obtained by subtracting a fixed oil quantity from the ideal oil level. CONSTITUTION:Signals 10 and 11 detecting the temperatures of an OF cable being operated and oil tank are inputted to a control section 9. The section 9, finds an ideal operating oil level in the oil tank based on the inputted temperature signals and sets a lower oil level limit SMIN by taking an error into account. An alarming level moving table 6 is moved in the vertical direction along a rotating shaft 2 and fixed shaft 3 by means of a servo motor 4 mounted on a mounting table 5 and stops at the limit SMIN When a float 33 in an oil gauge 32 descends and reaches the limit SMIN, a proximity sensor 7 is actuated on the table 6 and issues an alarm. Therefore, even a small oil spill can be surely detected with a simple device irrespective of the temperature variation over seasons and the variation of the power transmitting state.</p> |
