Abstract
This paper presents mechanical pump is fluid, is a kind of power will be the driving force behind efforts to be transmission fluid into the pressure of potential energy and kinetic energy of fluid machinery. Screw is turning to the use of screw liquid smoke emission. Screw and tube wall lining, close co-operation of the screw in the pump intake and outlet will be divided into between a sealed space. With the rotating screw and mating, sealing the space in the pump suction side evolving to inhaled enclosed room in which the liquid, and from inhalation of room along the screw axis to move from row to push the client, will be closed in the space of continuous discharge of liquid, like a nut in the thread when he was constantly turning the situation to move forward, this is the basic working principle of the screw pump. Show the practical application of current and relevant information, screw covers a wide range of applications, it is characterized by a smooth flow, the pressure pulsation of small, have a strong self-absorption capacity, low noise, high efficiency, long life, small size, reliable work. Highlight the advantage of conveying the formation of eddy current media is not to transport a wide range of viscosity of various media, we can transfer all kinds of lubricating viscosity or corrosive media, can also transport a variety of non-Newtonian fluid viscosity, but also gas-liquid mixture can lose, lose the solid-liquid mixing. It is widely used in offshore platform engineering, petrochemicals, shipping, electrical, mechanical hydraulic systems, building materials, water, ships, terminals, ports, oil depots, food, paper, sugar, military and industrial sectors, such as sewage treatment.
Keywords：Screw pump design Engineering Drawing Hydraulic calculation
