Water pump impeller made of polyphenylene sulfide (PPS) material and manufacturing method of water pump impeller

Abstract

The invention relates to a water pump impeller made of a polyphenylene sulfide (PPS) material. A material of an impeller body is an engineering plastic composed of pure polyphenylene sulfide (PPS) which accounts for 50-70 percent of the weight of the impeller body and modified glass fibers which account for 30-50 percent of the weight of the impeller body; an impeller seat with an inner groove is installed in the impeller body, and the impeller seat and the impeller body are integrated into a whole. A manufacturing method of the water pump impeller provided by the invention comprises the steps of: separating a preheated movable mould of an impeller mould from a stationary mould; sleeving the preheated impeller seat into an impeller seat positioning shaft inside the movable mould; then performing mould matching and mould locking; and delivering PPS plastic in a charging barrel of a plastic injection moulding machine to a spray nozzle of the plastic injection moulding machine, injecting the PPS plastic into the movable mould of the impeller mould, and maintaining pressure to form a finished water pump impeller product made of PPS material. The water pump impeller has the characteristics of lighter weight, good dimensional stability and dynamic balance, corrosion resistance, high strength and the like, and an automobile water pump employing the PPS impeller has the advantages of smooth operation, high efficiency and long service life.

Description

technical field [0001] The invention relates to an impeller, in particular to a water pump impeller used in automobiles and a manufacturing method thereof. Background technique [0002] At present, the automotive water pump assembly is composed of a pulley, a water pump body, an impeller shaft (including bearings), a water seal assembly, and an impeller. The impeller of the water pump is the executive part of the coolant circulation of the water pump. Its working principle is: the engine drives the impeller shaft to rotate through the pulley, the impeller and the impeller shaft are connected as one, and the rotation of the impeller shaft drives the impeller to rotate, so that the coolant is pumped by the centrifugal force of the impeller. Throw it out, so as to achieve the purpose of accelerating the circulation of coolant in the cooling system. The materials used for water pump impellers are mainly cast iron, steel plate or aluminum alloy, each with its own characteristics...

AI Technical Summary

Problems solved by technology

The cast iron impeller is the most used, which is corrosion-resistant and has a long service life, but it is heavy, and because the impeller is cast, the dynamic balance of the impeller is poor; when the pump is working, the stability of the impeller is reduced, and the power consumption is large during operation. Reduced pump efficiency

The steel plate impeller is light in weight, but its corrosion resistance is poor, and the shape of the blade fin is limited by the process, so only a simple shape of the blade fin can be made

The aluminum alloy impeller is light in weight and can be made into various blade shapes, but its corrosion resistance is poor

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