One question per day: Coal-to-oil and olefins discussion forum, 2017.12.23
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3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: Why is it necessary to immediately rotate the shaft of the (DMTO) olefin separation unit’s turbine after it stops operating? It takes some time for the turbine to cool down after stopping; if it cools while remaining stationary, the higher temperature in the upper part of the unit and the lower temperature in the lower part will cause the shaft to bend. Therefore, after the turbine is shut down, shaft turning must be carried out immediately to eliminate thermal bending of the rotor! Note: The answers will be released automatically in two days!
The purpose of rotating the rotor immediately after shutting down a turbo compressor is to prevent bending and deformation of the rotor.
The purpose of rotating the rotor immediately after shutting down a turbo compressor is to prevent bending and deformation of the rotor.
The purpose of rotating the rotor immediately after shutting down a turbo compressor is to prevent bending and deformation of the rotor.
The purpose of rotating the rotor immediately after shutting down a turbo compressor is to prevent bending and deformation of the rotor.
It takes some time for the turbine to cool down after it is shut down. If cooling occurs while the turbine is at rest, the shaft will bend due to the higher temperature in the upper part of the turbine body and the lower temperature in the lower part. Therefore, after the turbine is shut down, shaft turning must be carried out immediately to eliminate thermal bending of the rotor
Prevent uneven heating-induced bending of the turbine shaft
Answer: The thickness of the turbine casing is uneven; the upper part is thinner and cools down more rapidly, while the lower part, which is connected to the base, cools down more slowly. If the rotor is not rotated after shutdown, it remains stationary, with the upper part cooling faster than the lower part. This results in different rates of contraction in the upper and lower sections, causing the rotor to bend. Additional stress is generated on the shaft and bearings, increasing the risk of damage. Therefore, after shutdown, the rotor should be rotated every 15 minutes, and after 1 hour, it should be rotated every 30 minutes, so that it can cool down evenly to a lower temperature
It takes some time for the turbine to cool down after it is shut down. If cooling occurs while the turbine is at rest, the shaft will bend due to the higher temperature in the upper part of the turbine body and the lower temperature in the lower part. Therefore, after the turbine is shut down, shaft turning must be carried out immediately to eliminate thermal bending of the rotor
Answer: It takes some time for the turbine to cool down after it is shut down. If cooling occurs while the turbine is at rest, the shaft will bend due to the higher temperature in the upper part of the turbine body and the lower temperature in the lower part. Therefore, after the turbine is shut down, shaft turning must be carried out immediately to eliminate thermal bending of the rotor.