对铁路轻油罐车下部卸油装置密封问题的探讨

对于液体,根据分子运动论可知,在分子之间有着作用力。液体受压时,分子间距减小,分子之间产生斥力,就表现为压力,即压力的表现形式为要求膨胀的能。液体的压力产生还有一个液柱高度产生的位置能,位置能在液柱高度存在时是始终存在的。

. Research on Sealing of Unloading Provision Installed at the Bottom Part of a Rail Tank Car of Light Oil.

Drag modification causes great difficulty for unloading rail tank cars of light oil from upper part. To solve the problem, people tried many unloading methods such as mersible pumps with added low-pressure. Nevertheless,the problem of drag modification hasns't been completely solved. For that, it is pointed out in the paper that the key point in unloading from the bottom part of a rail tank car is the problem of unloading provision's sealing. The two requirements listed below should be considered in order to prevent the fluid from leaking; 1. To provide a sealing ring of required width for the sealing on the contact surface ;2. To provide a counter force (on the sealing ring) higher than the pressure of the medium. Based on the two conditions mentioned above, research is done on sealing of unloading provision installed on lower part of a light oil tank car, with a new type of facility for solving the sealing problem recommended.