Rotary compensator is a special pipeline compensation device, which is mainly used to absorb the axial displacement caused by thermal expansion and contraction of pipeline system, especially in large thermal pipeline network and steam pipeline system. Its design allows the pipe to compensate for displacement by rotary motion, rather than by telescoping or bending, as with other compensators.
Features of Rotary Compensator:
Pressure-free thrust: An important feature of the rotary compensator is that it does not generate additional pressure thrust during the compensation process, which means that the fixed brackets at both ends of the pipe can be made smaller, which simplifies the bracket design and construction.
Large compensation amount: The rotary compensator can provide a large amount of compensation, and a set of rotary compensators can compensate the pipeline displacement up to several hundred meters long.
Small space occupation: Compared to some conventional compensators, the rotary compensator is compact and takes up relatively less space.
Corrosion resistance: Rotary compensators are usually made of corrosion-resistant materials, which are suitable for conveying water, steam, oil, slurry and other media.
Easy maintenance: The maintenance of the rotary compensator is relatively simple when properly designed, and easy-to-replace seals are included in some designs.
Structure and working principle:
The rotary compensator is mainly composed of rotating inner cylinder, packing gland, fastening flange, etc. It forms a force couple through pairs of rotating cylinders and force arms to generate a pair of forces of equal magnitude and opposite direction, and the force arms rotate around the shaft to absorb the amount of thermal expansion generated on the straight pipe sections on both sides of the force couple. This compensation mechanism allows the pipe to compensate for displacement by rotation rather than linear expansion and contraction as it expands and contracts thermally.
Application Scenario:
Rotary compensators are widely used in heat network pipelines, steam pipelines and other industrial pipeline systems that need to absorb axial displacement. They are particularly suitable for long-distance pipelines and applications requiring large amounts of compensation, which can significantly reduce the stress on the pipeline, prolong the service life of the pipeline and improve the safety of the system.
Installation and use:
When installing a rotary compensator, it is usually necessary to use it in pairs in order to form an effective force couple. In addition, proper guide brackets and fixed brackets should be provided in the piping system to ensure the compensator works properly and prevent misalignment or twisting of the pipe.
The selection and installation of rotary compensator needs to be decided according to specific pipeline system parameters and working conditions, including pipeline diameter, working pressure, medium type, temperature range and expected displacement, etc.