定位桩及双联叶片泵是绞吸式挖泥船上两个很重要的部件。每只绞吸式挖泥船上有两根定位桩,两根定位桩不断上下运动,使船移动挖泥。定位桩升降靠液压油缸带动,油缸的进油口泵设计在油缸下端部球头上,如图1(a)。工作时,油缸前后、左右自由摆动,下端球头在球座内也随之转动,从而使球与球座之间橡胶密封 Positioning piles and double vane pump cutter cutter suction dredger is two very important components. Each cutter suction dredger has two positioning piles, two positioning piles keep up and down movement, the ship moving dredging. Positioning lift driven by the hydraulic cylinder, cylinder inlet pump design in the lower end of the cylinder head, as shown in Figure 1 (a). Work, before and after the cylinder, left and right swing freely, the lower ball in the ball seat also will be followed by rotation, so that the ball and the ball seat between the rubber seal