Engineering solution to problem of dosing of ultrafine materials in mixed feed production
2020
Chkalova, M., Orenburg State Agrarian Univ. (Russian Federation) | Pavlidis, V., Orenburg State Agrarian Univ. (Russian Federation) | Shahov, V., Orenburg State Agrarian Univ. (Russian Federation)
The article is devoted to the problem of dosing and incorporation of ultrafine (nano) trace metals into mixed feed. Nanomaterials (in the form of ultrafine powders and suspensions) differ significantly in their properties and effects from substances in the form of macroscopic dispersions and continuous phases. The authors present the experimental findings of the impact of the operation conditions of mixed feed production on ultrafine powders of trace metal properties. A review of the dosing means used in feed preparation and analysis of their technical and technological parameters showed the need to develop the authors’ design of a dispenser of ultrafine liquid-like materials. A hallmark of the presented dispenser is the availability of two isolated pneumatic chambers, a solenoid valve in the supply tank and a pneumatic shut-off valve at the end of the rod that provide increased operating speed, improved dosing accuracy and automatic introduction of ultrafine materials into the processed feed mixture. The article provides a dynamic analysis of a pneumatic actuator; for this purpose, the authors determined the operating effort on the rod when moving the membrane centre to a predetermined setpoint, the response time of the pneumatic actuator, the time of filling the membrane chamber to a predetermined pressure, as well as estimated the working force stock on the membrane rod when it is deflected by the magnitude of the stroke. Based on the system of engineering analysis, the technical characteristics of the dispenser of ultrafine liquid-like materials were obtained, which allowed the authors to create a prototype that is being tested at the training and production facilities of the Orenburg State Agrarian University.
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