Magnetic suspension centrifuge and control method of magnetic suspension system

Abstract

The invention brings forward a control method of a magnetic suspension system in a magnetic suspension centrifuge and a system thereof. Difference between a measured air gap and a standard air gap is calculated by the equation of Delta delta=delta1-delta0, and current output power tube groups are gradually controlled according to the calculation result so as to make the Delta delta to be equal to zero. The invention also provides a power control system of a magnetic suspension centrifuge. The power control system comprises a magnetic suspension system and a motor control device. The magnetic suspension system is composed of a displacement sensor, a computer controller and a solenoid, etc. The computer controller is composed of a motherboard, an input module, an output module and a power supply. By the technical scheme of the invention, the magnetic suspension centrifuge can operate steadily and stably, and defects caused by a speed reducer are eliminated. As sensor detection speed and computer processing speed are fast and reach only 1 / 100 second, stability of air gap distance can be maintained.

Description

technical field [0001] The invention relates to a control method and system of a magnetic suspension system in a magnetic suspension centrifuge, and belongs to the technical field of the magnetic suspension centrifuge. Background technique [0002] Cement pipes are prefabricated pipes made of cement and steel bars, which can be used as urban sewer pipes, as well as upper water pipes used in some special factories and mines. Modern urban life requires cement pipes for both underground sewage discharge and laying underground cables. It is mainly used in highways, municipal construction, residential quarters, sports fields, squares, urban and rural construction, industrial and mining enterprises to discharge rainwater, sewage and farmland irrigation, culvert pipes , cable tunnels and other special-purpose pipes. [0003] Round tubular cement products mainly include concrete pipes, concrete pipe piles and concrete poles. The centrifuge is the main equipment for the production ...

AI Technical Summary

Problems solved by technology

[0004] But the concrete of the nozzle is emphasized to be lower than the pipe body, so centrifugal technology is not suitable for pipe jacking; when forming, the pipe mold is lying on the centrifuge and rotates at high speed, and the steel mesh moves accordingly, so the aforementioned prior art will appear in two ways. Conditions that affect the service life of the pipe: 1. When the welded joints of the steel mesh are not firm, there will be tendon running and leaking, so that the pipe body will appear partially unreinforced. 2. It is difficult to center the steel mesh after forming, and the steel mesh is eccentric Yes, that is, the protective layer of the steel mesh is uneven; this process requires a large number of molds to ensure the output, and the size of each mold is biased, and the split mold will be disassembled and used for a long time. The roundness of the pipe, the verticality of the nozzle, the diameter and the length of the pipe have large deviations, which will affect the installation quality of the project. Leakage will cause the road surface to subside and pollute the soil and groundwater on both sides of the pipeline.

In addition, the above-mentioned existing technology also has the following problems: 1. The wear and tear of the rolling ring is very serious, and frequent repairs are required

2. The noise during work is very loud, and it is the most noisy equipment in the entire cement product factory.

Then, there will be mode jumping phenomenon during operation.

4. High power consumption

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