Rotor for rotation type displacement pump

Abstract

The rotor for rotary displacement pump includes one main body with central shaft hole and blades set symmetrically around the shaft hole. The blade has groove parallel to the rotor axis in the end and cavities in the two-side tangent to the rotor axis. In case that t some granular or hard impurity passes through the end of the blade, the impurity can crush into the groove to avoid jamming of and friction to the blade, and this can ensure the fluent conveyance of medium and increase the service life of the rotor pump.

Description

technical field [0001] The invention relates to the technical field of displacement pumps, in particular to a rotor for a rotary displacement pump. Background technique [0002] Positive displacement pumps have been widely used in chemical industry, metallurgy, electric power, papermaking, food, pharmaceuticals, synthetic fibers and other industrial sectors. Positive displacement pumps are divided into two categories: reciprocating and rotary. Viscous high-concentration media, corrosive media, or media that do not allow contamination, such as lubricating fluid, chocolate pulp, paper pulp, etc. The existing rotary positive displacement pump generally includes a pump body with an inlet and outlet, a pump cover, a main shaft, a driven shaft, two rotors in the pump body that are eccentric to each other and arranged crosswise, transmission parts and mechanical seal parts, wherein the main shaft The driven shaft and the driven shaft drive the two rotors to rotate oppositely to ea...

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Problems solved by technology

[0003] However, in the current rotary positive displacement pump, the rotor generally includes a body with a shaft hole in the center and blades arranged symmetrically to the center of the shaft hole. The number of the blades can be two or three, and some are even more. The shape and size of the end face of the blade are adapted to the inner side of the pump body, that is, the end face is a circular arc surface with a smooth surface. When working, the conveyed medium fills the entire pump cavity, and the space between the end face of the blade and the pump body is also filled with medium. , in the actual use process, the medium to be transported often contains fine particles and uncertain impurities, such as incompletely ground solid particles, hard welding slag in the pipeline, etc., the medium with solid particles will With the rotation of the rotor, the end faces of the blades and the inner side of the pump body are constantly rubbed, so that the parts will wear out over time, reducing the service life of the positive displacement pump, and when encountering that kind of hard welding slag, the rotor is easily stuck in the pump body , which seriously affects the normal conveying work of the positive displacement pump, and the parts are easily damaged.

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