【 Weak current College 】 screw pump selection of classification

Screw pump selection of categories are positive displacement Rotary pump screw pump, it is a pump screw gear and pump set form of displacement in the sealed Chamber to inhalation and discharge of liquids.
Screw in two adjacent seal leakage channels between no theory described as strict seal type screw pump, contrary to a non-strict seal type screw pump.
The practical application of provision is current and relevant information to show that the screw pump is a wide range of applications, it is characterized by a smooth flow, pressure pulsation of small, self-priming capacity, low noise, high efficiency, long life, compact, reliable.
Prominent advantage is conveying media not form Vortex, conveying various viscosity scope broad, can transfer mediums for various viscosity of lubricity or corrosive media, you can transport all kinds of non-Newtonian viscosity of liquid, gas liquid Multiphase Multiphase, solid-liquid.
It is widely used in offshore engineering, petrochemical industry, shipping, electrical, mechanical and hydraulic systems, food, paper, sugar, military industry and sewage treatment and other industrial sectors.
To Germany Albi Le company sales manager as saying: "there is no media in the world, is not conveying screw pump.
"Say screw pump can transport any media.
Of course, is not to say that a certain kind of screw pump can transport all media; media features and performance parameter number requirements can choose different types of screw pumps.
Number of screw screw press is usually divided into single-screw, two-, three-and five-screw pump, each has advantages in the application must have a selection of screw pump, only make full use of its own characteristics, in order to better achieve energy-saving, saving material, adding effects or meet certain specific requirements.
Single-screw pump-pump set is made of non-metallic elastic material (usually a rubber) preparing, bore a spiral groove, it's a spiral metal screw some sealed cavity formed between.
Metal screw for eccentric rotation to seal the pump area of low pressure, the displacement to high pressure area to complete inhalation, discharges of liquid and the whole process of the formation pressure.
In addition to the General media, single-screw pump can transport suspensions and metal particles, fibers, and other special media.
At the disposal of sewage and mud, common single-screw pump, usually working pressure is not high.
Traditional double-screw pump is a non-strict seal type screw pump, made by metal pump set two phase cut of cylindrical cavity, the cavity of two screw each meshing, engages in screw gear in the pump casing and screw between several seal.
Screw for rotation, the seal from the area of low pressure pump displacement to high pressure zone.
There are single-head screw, double-helix double-screw pump for lubrication medium, if sufficiently large spiral up corner, main screw can be directly driven Vice screw.
If matched with synchronization pinion, in theory, the two can not contact between the screw.
Traditional double-screw although non-strict seal, the working pressure is not high, but can convey viscosity range is very wide variety of media, you can transport all kinds of non-Newtonian viscosity of liquid, gas liquid Multiphase Multiphase, solid-liquid.
Therefore, the industry is on its place great interest, particularly in the petroleum, chemical industry.
Three screw pump theory is strict seal type screw pump.
In textbooks, usually as a typical screw.
Three screw pump is made of metal pump set within a main screw driving two driven screw.
Each variable has two spirals, pump cover and screw some sealed cavity formed between the screw for the rotation, the seal from the area of low pressure pump displacement to high pressure zone.
Three screw pumps for operating pressures up to 30MPa, conveying medium is clean, non-corrosive of lubricants, special occasion to convey high viscosity, non-corrosive mediums (e.g. ink, glue, etc.).
As a result of three screw 1: 3: 5 ratio of structure dimension and other reasons, three screw pump conveying media viscosity scope limited, in General only lubrication medium.
5 screw pump is usually non-strict seal type screw pump.
A main screw drive the four Vice screw, each with two helical screw.
Since the pump cavity flow section of the unit, and media transport capacity is large.
5 screw pump pressure usually 0.8MPa following the installation size restricted special occasions (e.g. ships, ships, etc.) is used to pump.