Rotating speed adaptive frequency conversion control system and method for concrete mixer

Abstract

The invention discloses a rotating speed adaptive frequency conversion control system and a rotating speed adaptive frequency conversion control method for a concrete mixer. The system comprises a controller, a frequency converter, two motors and two speed reducers; each of the two speed reducers is connected with a main shaft of the mixer; both the two motors are connected with the two speed reducers; the frequency converter is electrically connected with the two motors; the controller provided with a parameter automatic optimizing module is connected with the frequency converter. The system further comprises a module which can adaptively control the rotating speed in mixing according to the load so as to increase the rotating speed to clean a mixing shaft and blades when concrete is not mixed. With the adoption of the rotating speed adaptive frequency conversion control system and method for the concrete mixer, the installed power of the motors can be reduced, the cost can be decreased, and the energy consumption can be saved; the mixing speed and power of mixing can be adaptively controlled according to the load, thus the average power can be reduced, and the energy consumption can be saved; the parameters are automatically and optimally controlled according to different materials, so as to ensure the mixing quality while improving the mixing efficiency; when concrete is not mixed, the mixer can be cleaned by running at high speed.

Description

technical field [0001] The invention relates to the technical field of mixer control, in particular to a rotational speed self-adaptive frequency conversion control system and method for a concrete mixer. Background technique [0002] Traditional concrete mixers use uniform speed for material mixing, and the power of unloading is more than twice the average mixing power, so two motors are needed to meet the power requirements. One mixing speed often cannot adapt to different raw material formulations, and its mixing quality is difficult to ensure that it can be optimal under different formulations, which limits the traditional concrete mixer. When mixing different materials, the mixing quality cannot be optimal, or Affect stirring efficiency. The mixing shaft and blades are prone to residual mixing materials, and people need to enter the mixer to clean after the mixer is shut down, which is prone to danger. The frequency converter can change the starting conditions of the ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a rotational speed self-adaptive frequency conversion control system and method for concrete mixers to solve the problem that the above-mentioned ordinary concrete mixers do not include an automatic cleaning control system for the whole machine, cannot adapt to different raw material formulas, and the mixing quality cannot reach the optimum level. Good, artificial cleaning of the mixer is prone to dangerous problems

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