Selection of different screw pump requirements

Asian Pump News hearing screw pump is a positive displacement rotor pump, which is formed by the pump screw and pump casing formed a number of sealed chamber displacement to suction and discharge of liquid. Screw pump cavity adjacent to the two no theoretical leakage The channel is called a strictly sealed screw pump, on the contrary, non-strictly sealed screw pump. 椐 The current practical application and the relevant information shows that the application of a wide range of screw pump, which is characterized by steady flow, small pressure pulsation, Suction capacity. Low noise. High efficiency. Long life. Small size. Reliable work. Prominent advantage is the transmission medium does not form eddy current. Can deliver a wide range of viscosity of a wide range of media, both the transmission of various viscosity lubricity or corrosion It can also transport non-Newtonian liquids of various viscosities, and can also be mixed with gas and liquid. It is widely used in offshore platform engineering. Petrochemical. Shipping. Electricity. Mechanical hydraulic system. Foodstuffs. Papermaking. Sugar.Military and sewage treatment and other industrial departments.A to German Alwiller sales manager, said: "There is no media in the world, is the screw pump can not be delivered." Said screw pump can transport any medium. However, it does not mean that a certain type of screw pump can transport all the media, but according to the characteristics of the media and the number of performance parameters can choose different types of screw pump. Screw pump according to the number of screw is usually divided into single screw pump. Screw pumps, each have their own advantages, in the promotion of the application must have a choice of screw pumps, and only make full use of their respective characteristics, in order to achieve better energy-saving. Sa material. By-profit or to meet certain special requirements. Is made of non-metallic elastic material (usually rubber), the inner hole is spiral groove shape, it forms a number of sealed cavity with a spiral metal screw rod.Metal screw eccentric rotation, the seal cavity from the pump In addition to the general medium, the single screw pump can transport the suspension and metal-containing particles, special media containing fibers, etc. In the treatment of sewage and mud, Common single-screw pump, usually working pressure is not high. The traditional twin-screw pump is a non-strictly sealed screw pump made of metal materials, the pump casing has two phase-cut cylindrical cavity, cavity two screws The meshing screw tooth shape forms a plurality of sealed cavities between the pump sleeve and the screw rod, and when the screw rod rotates for rotation, the sealed cavity is displaced to a high pressure region by a low-pressure region of the pump, and has a single screw screw and a double screw screw pump For the lubrication medium, if the screw angle is large enough, the main screw can directly drive the sub-screw.If equipped with synchronous gear, in theory, there can be no contact between the two screws.Although the traditional twin-screw pump is not strictly sealed, the working pressure is not High, but can deliver a wide range of medium viscosity, can deliver non-Newtonian liquids of various viscosity, but also liquid-liquid mixed transport. Therefore, all industries have great interest in it, in particular Is the oil. Chemical industry. Three screw pump theory is a strictly sealed screw pump in the textbook, usually as a typical introduction to the screw pump.Three screw pump is set by the metal pump in a main screw driven two Driven screw composed of two helical screws per screw, the pump sleeve and the screw to form a number of sealed chamber, the screw for rotational movement, the sealed chamber from the low pressure area of ​​the pump to the high-pressure area. The highest three screw pump Pressure up to 30Mpa, the transmission medium is clean. Non-corrosive lubricants, special occasions can deliver high viscosity. Non-corrosive media (such as: ink. Glue, etc.) As the three screw 1: 3: 5 ratio of the structure Size and other reasons, the three screw pump medium viscosity range is limited, generally limited to the lubrication medium. Five screw pump is usually non-strictly sealed screw pump. A main screw drive four sub-screw, each screw has two spiral . Due to the large pump unit cross-section overcurrent, so the media delivery capacity .5 screw pump working pressure is usually below 0.8MPa, often in the installation of limited size special occasions (such as: ships, ships, etc.) for Pump (Shanghai Zhongcheng Pump Manufacturing Co., Ltd. for feed)

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