Internal grooving helical blade rotor for heat exchange tube

Abstract

The invention relates to an internal grooving helical blade rotor for a heat exchange tube. The rotor consists of a hollow shaft and a grooving type blade, wherein the grooving type blade is positioned on the surface of the hollow shaft; the outer diameter of the grooving type blade is less than the inner diameter of the heat exchange tube; the grooving type blade has a smooth surface and is helical around the hollow shaft; a flow guiding groove structure is arranged on the water facing surface of the grooving type blade along the radial direction of the hollow shaft, and the water deviating surface is not provided with the flow guiding groove structure, so that the pressure loss of a fluid when the fluid flows through the rotor is reduced; the grooving type blade and an edge which is contacted with water flow firstly are subjected to beveling or smoothing; and holes communicated with the inner hole of the hollow shaft are uniformly formed at a position, which is far away from a waterinlet end, of the hollow shaft along the circumferential direction. The rotation moment of the fluid to the rotor is changed by changing the helical angle and the axial length of the grooving type blade along the axial direction of the hollow shaft, the height of the grooving type blade along the radial direction of the hollow shaft, the distance between the flow guiding groove and the root of the blade and the length of the flow guiding groove along the axial direction of the hollow shaft; and the rotor is convenient to arrange in the heat exchange tube due to the combination and fixation mode of the grooving type blade on the hollow shaft.

Description

technical field [0001] The invention relates to an interpolation element for enhancing heat transfer and anti-fouling and decontamination in heat exchange tubes used in shell-and-tube heat exchangers, heat exchange reactors and other equipment, in particular to an interpolation element that uses the heat transfer fluid inside the heat exchange tube as the Power, low energy consumption and high efficiency slotted helical blade rotor that realizes self-cleaning and enhanced heat transfer function. Background technique [0002] Energy saving and emission reduction is a key technology that the whole world attaches great importance to. It is applied to many heat exchangers in many fields such as petroleum, chemical industry, thermal power, nuclear power, metallurgy, light industry, aviation devices and marine vehicles, among which the most Shell-and-tube heat exchangers are widely used, but there is a common layer of dirt in the inner walls of these heat exchange tubes, which lea...

AI Technical Summary

Problems solved by technology

To sum up, the spiral bond has the following main disadvantages: (1) The bond is a whole, which directly scratches the heat transfer tube and damages the inner wall of the heat transfer tube; (2) When the fluid flows to push the bond to rotate, it requires a large driving torque and consumes more (3) The service life of the bearing used for single-end fixing is short; (4) The effect of field synergy enhanced heat transfer generated by the bond is not significant

But the disadvantage is that when a certain fluid passes through, the rotation speed of the rotor is determined by the helix angle of the flight. When the flight lead is small, the rotation speed of the rotor is fast, and the resistance to the fluid increases accordingly; in order to solve this problem , China Patent Application No. 201110050891.8, the name of the invention is "Radial Stepped Rotor in Heat Exchange Tube". The device is composed of a rotor, a support frame and a connecting axis. Fixed on the support frame, multiple rotors are installed on the connecting axis. The rotor is composed of a hollow shaft and blades. The blades are stepped. Each blade is in the same inclined shape as the hollow shaft. The passing performance is good, but the fluid resistance of this structure is relatively large, the flow rate at start-up is too high, the axial force of the rotor superimposes a large force on the pendant and the shaft, and the life of the shaft will be reduced. The arrangement of the rotor blades described above is uniformly distributed in the On the hollow shaft, in order to facilitate the installation of the rotor, there is a large distance between the outer diameter surface of the rotor and the inner diameter surface of the heat exchange tube, so that the enhanced heat transfer and anti-scaling and descaling capabilities of the rotor are limited to a certain extent

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