Constant speed control device of mixer truck, mixer truck and method for controlling constant rotating speed of mixing drum

Abstract

The invention discloses a constant speed control device of a mixer truck and the mixer truck, and also discloses a method for controlling the constant rotating speed of a mixing drum. The disclosed constant speed control device of the mixer truck comprises a hydraulic pump and a hydraulic motor, wherein, the hydraulic pump is used for providing hydraulic power to the hydraulic motor by depending on the engine driving of the mixer truck, and the hydraulic motor drives the mixing drum of the mixer truck to rotate. The constant speed control device of the mixer truck also comprises a controller which comprises an input module, an analysis module and an output module, wherein, the input module is connected with the engine and outputs the actual rotating speed of the engine to the analysis module; the analysis module acquires the preset displacement of the hydraulic pump according to the actual rotating speed and the preset rotating speed of the mixing drum and outputs the preset displacement to the output module; and the output module outputs variable signals to a variable mechanism of the hydraulic pump according to the preset displacement. In the technical scheme provided in the invention, the displacement of the hydraulic pump is adjusted according to the actual rotating speed of the engine, and the adaptive performance, economy performance and stability of the mixer truck withthe constant rotating speed control device of the mixer truck can be improved.

Description

technical field [0001] The present invention relates to a constant speed control technology of a concrete mixer truck, in particular to a constant speed control device for a mixer truck, and a method for controlling the constant speed of a mixer drum, so as to realize the control of the rotation speed of the mixer drum of a mixer truck. A mixer truck with the above constant speed control device for the mixer truck. Background technique [0002] With the continuous development of the construction industry, the output of mixer trucks is increasing year by year; in order to ensure that the carried concrete maintains the predetermined quality, it is necessary for the mixer truck to meet the predetermined conditions during the entire transportation process. The predetermined conditions may include: [0003] First, keep the mixing drum rotating, that is, during the entire transportation process, the mixing drum must keep rotating to avoid concrete solidification; if the mixing dru...

AI Technical Summary

Problems solved by technology

The specific control method is to use a set of controller and micro-motor to control the throttle opening of the engine to control the speed of the engine. This control system is very complicated, and the cost is high and the reliability is poor. The need for speed control

[0010] In short, the existing constant speed control technology of the mixing drum cannot guarantee the economy, adaptability and rotation stability of the mixing drum at the same time

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