| 摘要 |
<p>PROBLEM TO BE SOLVED: To supplement air into an air tank after assembly to surely reduce a surge pressure in a return piping. SOLUTION: A device comprises an air tank 9 connected to a return piping 6 to accumulate air, air piping 10 providing between the air tank 9 and an air chamber 7a of an oil tank 7, and an air solenoid valve 11 interposed in the halfway of the air piping 10 to be worked with a key switch 12. In this way, the air solenoid valve 11 is opened to guide air through the air piping 10 supplemented in the air tank when a prime mover 1 is stopped by stopping operation of the key switch 12. Next, when the prime mover 1 is operated by the starting operation of the key switch 12, the air piping 10 is interrupted to hold air in the air tank 9, and in this condition, a surge pressure, when it is generated in the return piping 6, is reduced with compressing it by air in the air tank 9.</p> |
