我们设计研制的螺杆泵是一种长期置于井下,浸没在原油之中、连续工作运转的抽油泵,这种泵分为电力驱动和液压驱动两种型式。为了保证泵的动力端与泵的液力端相互密封,我们对这两种驱动方式的井下螺杆泵中间密封装置分别采用如下结构。电力驱动螺杆泵的密封结构如图1所示。是由密封环1、固定螺丝2、浮动套3、弹簧 Our design and development of the screw pump is a long-term underground, immersed in crude oil, continuous operation of the pump, the pump is divided into two types of electric drive and hydraulic drive. In order to ensure that the pump power end and pump hydraulic end sealed to each other, we have two types of drive underground screw pump seal the middle of the following structures were used. Power-driven screw pump seal structure shown in Figure 1. It consists of a seal ring 1, a set screw 2, a floating sleeve 3 and a spring