Seeking successful cases of planetary gear control centrifuge speed regulation
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Dear gods: Currently, I want to modify the existing centrifuge and change the driving engine from a steam turbine to a motor. The motor power is about 6500KW. I want to use planetary gears to control the speed. Does anyone have a successful case?
The electric drive can be directly connected to high-voltage frequency conversion! Or use Voith Turbo's hydraulic transmission transmission adjustment device. This is used a lot in centrifugal compressor drives on long-distance natural gas pipelines abroad. In China, high-pressure frequency conversion speed regulation is more common.
Fushun Petrochemical's automobiles were refitted with two sets of planetary gear transmissions produced in China (Harbin). It is currently in the manufacturing stage and is the first time it has been used in process compressors in China. You can find out.
What research did you conduct? What are the advantages and disadvantages? Planetary gears have high efficiency and good stability, but they have not been used.
How efficient is the hydraulic transmission? How stable is it?
Voith's hydraulic coupling speed control device is very reliable and has high transmission efficiency. Around 2010 (I forget the specific time), our company organized an inspection team to go to the United States to investigate the application of this device in long-distance natural gas pipelines. It was found that they have been used for more than twenty years. According to the on-site management personnel, the hydraulic coupling speed regulating device is very reliable and requires very little maintenance work (it basically requires no maintenance at ordinary times). The equipment is compact, like a gearbox, installed between the motor and the compressor, and has no special requirements for the working environment. The disadvantage is that it is not cheap! At that time, when compared with high-voltage frequency conversion devices, there was little advantage in terms of price. Moreover, foreign parties are unwilling to license this technology to domestic branches for production (this was the situation back then, I don’t know if it is produced domestically now). Domestic high-voltage frequency converters are now also very mature products and are widely used in domestic long-distance oil and gas pipelines. However, high-voltage frequency converters have higher requirements on the working environment and must be installed in a special machine room. Ensure cooling, temperature control, dust prevention and ventilation.