Automatic cleaning screw for track end face bearing

Abstract

The invention relates to an automatic cleaning screw for a track end face bearing. A hook head shaft moving together with the cleaning screw enables the cleaning screw to generate axial reciprocatingcleaning screw movement under the action of the track end face of a nozzle bearing, and simultaneously achieves slow rotation required for avoiding abrasion, so that the automatic cleaning capabilityof dirt is improved, and the uniformity of dirt cleaning is remarkably improved. Under the action of a positioning bearing tube, the hook head shaft can maintain coaxiality with the center line of a heat exchange tube when rotating, so that the possibility of abrasion between the cleaning screw near a pipe orifice and the inner wall of the heat exchange tube caused by rotating and shaking of the hook head shaft is avoided. The nozzle bearing is produced by injection molding of abrasion-resistant engineering plastics; and therefore, the track end face bearing has automatic spiral cleaning, simple structure, little resistance, convenient manufacture and good universality, and is suitable for tubular condenser, evaporator and crystallizer where tube pass feed liquid can generate dirt.

Description

technical field [0001] The invention relates to an automatic cleaning screw for rail end bearings, which relates to online continuous automatic cleaning of liquid dirt on the inner wall of a heat exchange tube and enhancement of convective heat transfer inside the heat exchange tube. It is generally used in shell and tube condensers, evaporators and crystallizers where the tube-side feed liquid will produce soft and hard scales. It is especially suitable for large and small water-cooled shell and tube condensers in the petrochemical industry. Background technique [0002] There are many technologies for online continuous automatic cleaning of liquid dirt on the inner wall of heat exchange tubes. [0003] As we all know, the earliest success is the rubber ball cleaning device, which has significant advantages for large heat exchangers such as condensers for power plant steam turbines. However, it is too expensive and complicated for hundreds of small condensers in the petroch...

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Problems solved by technology

[0003] As we all know, the earliest success is the rubber ball cleaning device, which has significant advantages for large heat exchangers such as condensers for power plant steam turbines. However, it is too expensive and complicated for hundreds of small condensers in the petrochemical industry. Difficult to promote and apply

[0004] Self-rotating cleaning steel wire spiral cleaning technology (experimental research on automatic rotating spiral heat transfer technology, Chemical Equipment Technology, 1997, No. 5) has a simple structure and low resistance, but there are serious defects in the inner wall of the wear tube, which cannot meet the engineering reliability. basic requirements

[0005] 2014.10.15 authorized invention patent ZL201110211151.8 "A Hydrodynamic Elastic Deformation Energy Storage Self-rotating Steel Wire Spiral", which better solves the problem of the self-rotating steel wire spiral on the inner wall of the heat exchange tube. However, because most of the time it does not rotate, There is a big problem that the automatic cleaning function is insufficient

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