Manufacturing method of rotational flow self-priming pump

Abstract

The invention relates to the technical field of pump manufacturing, in particular to a manufacturing method of a rotational flow self-priming pump. The rotational flow self-priming pump comprises a motor and a pump body, the pump body comprises a suction chamber, an impeller chamber, and a pressing-out chamber, the suction chamber, the impeller chamber and the pressing-out chamber are each formedthrough splicing of steel plates, and the manufacturing method comprises the steps of A, steel plate blank preparing, B, machining and forming shapes needed by the steel plates corresponding to the suction chamber, the impeller chamber and the pressing-out chamber, and c, welding and fixing the steel plates corresponding to the suction chamber, the impeller chamber and the pressing-out chamber toform a pump body. The pump body is formed through welding fixing of the steel plates after stamping forming, the surface precision of the steel plates is high, the water flow can smoothly enter channels, the volume losses are reduced, the hydraulic efficiency is improved, the problem that in the cooling solidification time after casting, a shrinkage cavity is easily formed, normal work of the rotational flow self-priming pump is prevented from being affected, and work efficiency is high.

Description

technical field [0001] The invention relates to the technical field of pump manufacture, in particular to a method for manufacturing a swirl self-priming pump. Background technique [0002] The flow channel of the pump body in the existing self-priming pump on the market is too narrow because the flow channel area is too small, and the outlet of the flow channel is provided with a corner, and the cross-sectional area of ​​the flow channel varies unevenly, resulting in low hydraulic efficiency during the working process, thus wasting Some unnecessary hydraulic resources, due to the unreasonable structure of the stator and rotor in the motor, the distribution of the magnetic flux density and magnetic circuit in each part of the motor core is unbalanced, resulting in a large loss, and the increase in harmonics causes a series of adverse effects, resulting in self-priming The overall efficiency of the pump is not high, wasting unnecessary hydraulic and electrical resources. [...

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Problems solved by technology

[0019] The upper mold and the lower mold of the pump casing are made of high-temperature alloy. The high-temperature alloy has the advantages of oxidation resistance, creep resistance and high strength. The upper and lower molds of the pump casing can be recycled, saving energy The consumption of the pump casing reduces the cost. The inner cavity mold of the pump casing is made of silicone rubber. The inner cavity mold of the pump casing is still elastic when heated to 150°C. When demoulding, the inner cavity mold of the pump casing is taken out from the inside of the pump casing to avoid scratches Damage the inside of the pump casing, but the life of the general silicone rubber mold is less than 20 molds, so the service life is short, and the silicone rubber mold needs to be continuously remanufactured, which increases the manufacturing cost and has many processes and a long molding cycle

[0020] There is also investment casting, that is, the outer surface of the mold tire made of plastic foam is rolled and coated, and after drying, it is placed in a sand box and the sand box is vacuumed before casting. The high-temperature molten iron burns the foam into gas and becomes This kind of casting of parts is also called vacuum casting, and the cost is high. The gas burned has a great impact on the environment.

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