Concrete spreading device and vibration elimination method, controller and device for arm frame thereof

Abstract

The invention discloses a vibration elimination method for an arm frame of a concrete spreading device. The method comprises the steps: detecting a vibration direction signal and a vibration intensity signal of the tail end of the arm frame; and when the vibration intensity signal exceeds a vibration intensity threshold value, selectively controlling a hydraulic pump to communicate with a rod-end cavity or a cap-end cavity of an arm frame hydro-cylinder, adjusting a pump output pressure P1 according to the vibration direction signal, and maintaining the vibration signals within the range of a set threshold value by adjusting the pressure of the rod-end cavity or the cap-end cavity of the arm frame hydro-cylinder, and when the vibration intensity signal does not exceed the vibration intensity threshold value, control the hydraulic pump output to zero. By means of the technical scheme, the output pressure of the arm frame hydro-cylinder can be controlled according to the vibration of the arm frame. The vibration elimination method for the arm frame of the concrete spreading device takes corresponding control by detecting the vibrations of the arm frame, so that the detection is simple and convenient, the adjustment can be processed in real time, the control is direct and has low time delay, the control precision is high and the energy-saving effect is obvious.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a vibration suppression method, controller, device and concrete distribution equipment including the device. Background technique [0002] For the current concrete distributing equipment, there will be pressure fluctuations during pumping, especially the pumping equipment usually adopts the double-cylinder pumping method, so the pressure fluctuation at the moment when the double-cylinders work alternately is greater. Regardless of the pumping method, it will bring a large impact to the delivery pipe and the boom, which will cause the vibration of the boom and cause the end hose to swing, which will not only affect the work of the entire equipment, but also affect the boom. service life, and even cause accidents. [0003] As far as various current technologies for suppressing boom vibration of concrete placing equipment are concerned, for example, in an existing method for su...

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Problems solved by technology

Such a control method will inevitably increase the stress of the boom system by increasing the pulse vibration with opposite phase, which will have a great impact on the service life of the boom

Moreover, the detection amount of the first method in the prior art is relatively small, and the control signal obtained under the condition of such less information is difficult to adapt to booms of different attitudes, and the control signal can only be aimed at a specific attitude of the boom , when the attitude of the jib changes, it is difficult to obtain the ideal control effect when it gets the control signal

The second method in the prior art directly detects the vibration at the end of the boom and the attitude of the boom. The information reflected by the control signal thus obtained is relatively comprehensive, but the algorithm for obtaining the control signal is complicated, and the control signal is caused by too many parameters. less robust

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