Split type impeller

Abstract

The invention discloses a split type impeller, and belongs to the technical field of impellers. Four detachable and replaceable combined type impellers are buckled on the end face of an impeller main plate, a pressing ring for pressing the four combined type impellers is arranged at the center of the impeller main plate, the pressing ring is combined on the impeller main plate through a screw, and the end portion of the pressing ring is provided with a flow dividing protective cap for sealing the pressing ring; tightening lock catches for fixing the combined type impellers are arranged at the outer ends of the combined type impellers; a main shaft is screwed into the center of the rear end of the impeller main plate in a threaded mode, and a main shaft stress unloading device is arranged between the main shaft and the impeller main plate; four sets of locking devices are arranged at the rear end of the impeller main plate, the combined type impellers are further fastened on the impeller main plate through the locking devices, each set of locking devices lock one combined type impeller, each locking device is composed of two locking plates and a locking sliding pressing plate, and the locking plates hook the combined type impellers and are fixed to the impeller main plate through the locking sliding pressing plates; and anti-skid wear-resisting plates fixed among the locking devices are arranged on the rear end face of the impeller main plate.

Description

technical field [0001] The invention relates to a split impeller and belongs to the technical field of impellers. Background technique [0002] The impellers of slurry pumps, sand pumps, and gravel pumps are generally small in diameter due to factors such as manufacturing technology costs. Increasing the prime mover horsepower and increasing the pump speed can effectively increase the sand (ore) extraction and head of the pump, but due to the slag The working characteristics of the slurry pump, especially the gravel pump for pumping large-diameter gravel, the high-speed rotating gravel of the impeller will have a greater impact on the blades of the impeller, resulting in damage to the impeller or even failure to work. 3. The stronger the friction between the sandstone and the impeller, the greater the ratio of mechanical energy to heat energy, which will reduce the working efficiency of the pump, cause energy loss, increase fuel consumption and electricity consumption, and r...

AI Technical Summary

Problems solved by technology

[0004] The overall casting impeller has good wear resistance and has a longer service life than the welded impeller. However, due to the limitation of casting technology and other factors, the cost of the casting impeller increases geometrically with the increase of the diameter of the impeller, and the difficulty of casting and processing increases accordingly. Therefore, the price is high, which is several times that of the welded impeller with the same diameter, and because it is integrally cast, it cannot be disassembled, and local wear and tear needs to be replaced as a whole, so the cost of use is high, which limits the use and promotion of integrally cast impellers

[0005] Most of the impellers used in small sand pumping ships in my country are simple welded impellers. The cost of a welded impeller with a diameter of 700 mm is less than 1,000 yuan. Because it is a simple impeller, the shape of the blade is not very consistent with hydrodynamics. The principle is that the diameter of the impeller of the pump is small and the energy conversion efficiency is low. It needs to rely on the strong power of a high-power diesel engine to complete the extraction of sand and gravel at a high speed. The life of the impeller is extremely short, with an average life of less than ten days. diesel and metal

Generally, the welded sand pump impeller blades are made of lap welded waste automobile leaf springs, and the welded impeller blades are welded with ordinary plates, which are not wear-resistant. This impeller is hand-welded, and the largest The diameter of the welded impeller is 800 mm, and a new technology is urgently needed to replace the welded impeller in terms of excessive diesel consumption and economic benefits

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