Differential Expansion
Date:2016/7/12 19:56:50 Visits: Author:Dongfang YOYIK Engineering Co; Ltd,China Steam Turbine Differential Expansion Sensor Manufacturer
PRODUCT DESCRIPTION
Expansion is the relative thermal growth between the rotor and the casing, when the difference between the thermal growth is more than the allowable clearance, it may produce friction. In the process of start-up and shutdown, due to the quality of rotor and casing, the different coefficient of thermal expansion coefficient, heat dissipation.
There are two types of differential expansion for steam turbines: positive and negative. Traditionally, when the expansion of the rotor exceeds that of the cylinder, the difference in expansion is considered positive, and when the expansion of the cylinder exceeds that of the rotor, the difference in expansion is considered negative. According to cylinder classification, it can be further divided into high difference, medium difference, low I difference, and low II difference.
The differential expansion value is a very important operating parameter. If the differential expansion exceeds the limit, the thermal protection action will trip the host to avoid collision between the dynamic and static parts and damage to the equipment. So the purpose of monitoring the difference expansion is to take the necessary measures to ensure the safety of the unit before the friction is produced.
REGULAR SPARES
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Differential Expansion Monitor MMS6210 |
High Pressure Cylinder Expansion Probe PR6424/000-030 |
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Differential Expansion Sensor and Proximitor PR6426/000-030 |
Differential Expansion Sensor PR6426/000-131 |
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Differential Expansion Sensor PR6426/010-000 |
Differential Expansion Probe PR6426/010-010 |
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Differential Expansion Sensor PR6426/010-040 |
Differential Expansion Sensor PR6426/010-110 |
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Differential Expansion Sensor 330851-02-000-050-90-00-05 |
PRODUCT PICTURE
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