| 摘要 |
<p>PURPOSE: To decrease an oil hammer through the minimization of a back pressure and also to reduce equipment cost with the simplification of component members. CONSTITUTION: The inner flow passage of a pipe joint member 39, which is used in return piping 33 for discharging from a hydraulic cylinder, is made by a lost wax method so that a smooth surface is obtained. As a result, a pressure oil in the piping is flowed along the smooth surface formed in the pipe joint member 39, thereby preventing generation of a back pressure, decreasing an oil hammer and reducing the equipment cost. In addition, a damper 35 for preventing pulsation is provided in the return piping 33; therefore, the oil hammer can be further reduced.</p> |
