Slurry pump flow components of the main work is the pump body, impeller and volute, impeller in the pump body device on the shaft, and connected to the motor to form a whole. When rotating motor to drive the impeller, the blade forcing fluid in the impeller rotation, forcing the pressure of the fluid potential energy and kinetic energy increase. At the same time, the fluid under the action of inertial force, from the center to the edge of the impeller flow, and with high speed flow impeller, after discharge line to achieve the purpose of conveying.
Of the slurry pump accessories material to roughly two kinds of metal and rubber.
Slurry pump commonly used metal material is divided into cast iron, ductile iron, high chromium alloy, stainless steel and so on.
Common rubber material is divided into: natural rubber, synthetic rubber, butyronitrile, etc.
Industrial iron general carbon content is 2% ~ 4% of carbon in cast iron by graphite form, sometimes also with cementite. In addition to carbon, also contains 1% ~ 3% of silicon in cast iron, and manganese, phosphorus, sulfur and other elements. Also contain nickel, chromium, molybdenum alloy cast iron, aluminum, copper, boron, vanadium and other elements. Carbon, silicon, are main elements affect the microstructure and properties of cast iron.
Cast iron can be divided into:
(1) of grey cast iron carbon content is higher (2.7% ~ 4.0%), carbon mainly exist in flake graphite morphology, fracture brown or grey.
(2) white cast iron carbon and low silicon content, carbon mainly cementite form, fracture in silver
(3) malleable cast iron by white cast iron after annealing treatment, graphite flocculent mass distribution, hereinafter referred to as ductile iron
(4) nodular cast iron will be grey cast iron molten iron after spheroidizing treatment, precipitation of graphite spheres, hereinafter referred to as ductile iron
(5) vermicular cast iron will be grey cast iron molten iron after injection vermicularizing treatment, precipitation of graphite vermicular
6. Alloy cast iron. Ordinary cast iron adding suitable amount of alloy elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.). Alloying elements make the cast iron matrix was changed, which has the corresponding heat resistant, wear resistant, corrosion resistant, low temperature or without magnetic resistance and other properties. Now commonly used slurry pump is high chromium alloy cast iron.
Rubber is divided into natural rubber and synthetic rubber.
General rubber: refers to the part or the whole instead of natural rubber with analysing, such as styrene butadiene rubber, butadiene rubber, isoprene rubber, etc
Styrene butadiene rubber, butadiene and styrene copolymer was prepared, is the biggest general synthetic rubber production
Butadiene rubber: is made by solution polymerization of butadiene, butadiene rubber has a special excellent cold resistance, abrasion resistance and play
Sex, but also has good resistance to aging performance.
Neoprene: based on chloroprene as the main raw material, through homopolymerization or a small amount of other monomer copolymerization. Such as high tensile strength, heat resistance, good light resistance, aging resistance performance
High chromium alloy material slurry pump has high wear resistance strength, compressive strength, good hardenability and good stability, good resistance to tempering softening.
Rubber lining slurry pump is mainly using natural rubber, acid-proof performance is very strong, very suitable for conveying slurry containing fine powder. |
