毕业论文 双吸式二螺杆泵的结构设计.docVIP

本科毕业论文 双吸式二螺杆泵的结构设计 STRUCTURAL DESIGN OF THE DOUBLE SUCTION OF THE TWO-SCREW PUMP 学院（部）：机械工程学院 专业班级： 学生姓名： 指导教师： 2012年 5月 28 日 双吸式二螺杆泵的结构设计 摘要 双吸式螺杆泵在最近几年里有着突飞猛进的发展，现在已经应用于很多领域而且取得了很好的成果。双吸式二螺杆泵的应用范围和领域在将来一定会越来越大的，对其技术的要求也越来越高了。因此本文主要介绍了双吸式二螺杆泵的结构设计步骤，以及其中各个零部件的选择。 首先，我们要知道和了解双吸式螺杆泵的工作原理。双吸式二螺杆泵是主动螺杆在转动时带动从螺杆在衬套中转动，依靠形成的密封腔的容积变化来输送流体的。其次，螺杆是一个螺杆泵最重要的部分，因此我们首先设计的便是双吸式二螺杆泵的主从动螺杆的结构。双吸式二螺杆泵的设计过程中螺杆的设计有着举足轻重的作用，螺杆的结构设计主要与所给定的流量和压力以及所输送的介质这些数据来确定的。在次，螺杆泵的密封是很重要的。螺杆泵是一个压力泵，只有它的密封系统做好了才能产生足够的压力来输送介质。因此在设计的过程中衬套与螺杆的密封、衬套与壳体的密封、螺杆与端盖的密封都是我们要考虑的。最后，我们就是要选择一些双吸式二螺杆泵用的附件，像螺钉、轴承、安全阀、垫圈等。 文章中重点介绍了双吸式二螺杆泵的螺杆的设计计算和衬套壳体的密封性设计，另外对于双吸式二螺杆泵的附件的选择也做了很多的介绍。 关键词：双吸式二螺杆泵，结构设计，密封系统，设计步骤 STRUCTURAL DESIGN OF THE DOUBLE SUCTION OF THE TWO-SCREW PUMP ABSTRACT Double suction of the two-screw pump has a rapid development in recent years, and it is now used in many areas and have a good achievement. Range of applications and fields of the double suction of the two-screw pump in the future will become increasingly large, and its technical requirements have become higher. So this paper describes the structural design steps of the double suction of the two-screw pump and the choice of the various components. First, we need to know and understand how the double suction of the two-screw pump works. Double suction of the two-screw pump is active screw driven in rotation from the screw rotation in the bushing, it relies on the formation of the sealed chamber of volume change transmission fluid. Second, The screw is the most important part of a screw pump, so we first design the active screw and driven screw structure of the double suction of the two-screw pump. Screw design has a very important role in the design process of the double suction of the two-screw pump, the data to determine of the structural design of the screw with the flow and pressure as well as the transmission medium. Third, the seal of screw pump is very important. Screw pump is a pressure pump, a good sealing syste