As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oil sealed sliding vane rotary vacuum pump.

• 组合式空心转子由于轴头与转子体之间的结合面存在着渗漏,使泵的抽气效率性能下降,从而影响其在应用中的效率。