Built-in insertion-type concrete vibrator for electric motor and its anormal operation protection method

Abstract

The invention relates to a motor-inserted concrete vibrator and its abnormal operation protecting method, where the built-in motor adopts rotor position sensor-free PM motor whose stator is of a three-slot structure, whose three windings are directly coiled on three teeth and whose rotor adopts segmented annular magnetic steel which is directly jacketed on rotating shaft and fixed with glue, where an eccentric block is welded on the rotating shaft, supported by multiple parallel rollers and ball bearings; the motor is cooled with machine oil, and the cooling oil and bearing lubricant are merged into one; the stick body, upper sleeve and lower cone are interlinked through thread; the rotating direction of the thread cooperates with that of the motor, and as operating, the upper and lower threads are automatically tightened by force; the power of the built-in motor can be above twice higher than the limit power of the existing technique; and the vibrating stick has functions of abnormal operation protection and abnormal use condition protection and has a service life above 4000 h and noises below 70db, saving energy, portable and having a weight of only several kg.

Description

technical field [0001] The invention relates to a plug-in concrete vibrator with a built-in motor and an abnormal operation protection method thereof, which are used in construction engineering and belong to the technical field of construction machinery. Background technique [0002] Concrete vibrator is one of the necessary tools for pouring concrete. Construction industries such as building houses, roads, bridges, and water conservancy projects cannot do without it, and it is widely used. [0003] At present, more than 90% of the concrete vibrators used in engineering are planetary roller cone-inserted concrete vibrators, which have been in use since the 1960s. [0004] The basic structure and principle of the planetary roller cone plug-in concrete vibrator is as follows: the ordinary asynchronous motor drives the roller cone to perform planetary rolling along the pipe wall in the casing through the flexible shaft. The roller cone rotates once and rolls along the pipe wa...

AI Technical Summary

Problems solved by technology

These problems have affected its practical value, making most construction teams still choose the planetary roller cone inserting concrete vibrator with high noise, energy consumption and labor intensity.

Images