1.前言螺杆泵是一种依靠螺杆转动,使得封闭在螺杆螺纹槽与螺杆衬套间形成的空间内液体沿着轴方向移动的容积泵。这种泵有着各种结构型式,如果按螺杆数多少来分类,则有单螺杆、双螺杆和三螺杆泵。本文对这三种具有代表性的泵仅作一般说明,而对三螺杆泵将从结构、性能等各方面作详细阐述。 1. Introduction Screw pump is a kind of rely on the screw rotation, so closed in the screw thread groove and screw bushing space formed between the fluid along the axial displacement of the positive displacement pump. This pump has a variety of structural styles, according to the number of screws to classify, there are single-screw, twin-screw and three-screw pump. This article on the three representative of the pump only for general instructions, while the three-screw pump will be from the structure, performance and other aspects described in detail.