Variable-frequency and variable-amplitude vertical vibration device of block forming machine

Abstract

The invention discloses a variable-frequency and variable-amplitude vertical vibration device of a block forming machine, and belongs to the technical field of design and manufacture for variable-frequency and variable-amplitude vertical vibration devices of block forming machines. The variable-frequency and variable-amplitude vertical vibration device comprises an electronic control portion and a mechanical portion. The electronic control portion comprises a touch screen, a programmable controller, a communication card and an alternating-current asynchronous servo driver. The mechanical portion comprises a vibration table and four vibration units. Each vibration unit comprises an eccentric shaft, a flexible coupling and a motor. Two rotation units of each group constantly keep oppositely and synchronously rotating under the control of the electronic control portion, and the vibration amplitude of the variable-frequency and variable-amplitude vertical vibration device can be changed by means of changing an included angle between two groups of rotation units during operation. The variable-frequency and variable-amplitude vertical vibration device has the advantages that the optimal vibration amplitude value and the optimal vibration frequency value can be selected according to forming requirements of concrete mixtures, so that the material application range can be expanded, and the quality of finished products can be guaranteed; the eccentric shafts are directly driven by the couplings to rotate, so that connecting assemblies such as eccentric shaft coupling gears of original equipment are omitted; problems of abrasion and damage of the assemblies such as the coupling gears due to frequent starting and stopping and high-speed violent vibration are solved.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of a frequency-variable-amplitude vertical vibration device for a block forming machine. Background technique [0002] The block forming machine is a kind of machine that relies on the combination of vibration and pressure to make the concrete mixture quickly and densely formed in the cavity, and the vibration device is an important part of it. The two most basic parameters of the vibration device are "vibration frequency" and "amplitude". The size of the two parameters and the degree of coordination between them determine the speed and effect of the concrete mixture being compacted in the cavity. The choice of "vibration frequency" and "amplitude" is related to the fluidity and particle size of the concrete mixture in the cavity. If the "vibration frequency" is too low, the molding speed will be slow, and if the "vibration frequency" is too high, it will inevitably lead to high ene...

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Problems solved by technology

[0004] 1. The prime mover is frequently in the cycle working state of start-low speed rotation-high speed rotation-stop, resulting in a lot of waste of energy

[0005] 2. Since the amplitude is immutable, it is difficult to choose the best amplitude value according to the needs of concrete mixture molding, which affects the use effect of the molding machine and limits the adaptability to raw materials

[0006] 3. In order to make the vibrating device produce vertical directional vibration, the current vibrating device uses gears to couple the two eccentric shafts together. Due to frequent start and stop and high-speed and severe vibration, the gears are extremely easy to cause wear and damage

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