Working principle of sleeve type Working principle of sleeve type thrustless compensator

Working principle of sleeve type thrustless compensator   

The sleeve-type thrust-free compensator uses the principle of fluid mechanics balance and cleverly uses a dense annular steam chamber in the design structure. There are two annular pressure surfaces AB in the steam chamber. A is the fixed end surface of the steam chamber, and B is The annular surface of the shoulder of the telescopic tube sealed in the steam chamber is movable along with the telescopic tube. The area of the movable annular pressure surface is exactly the same as the cross-sectional area of the telescopic. When the compensator is working, under the action of the medium pressure, the pressure on the annular surface is equal to the pressure of the cross-sectional area of the telescopic tube, but the direction is opposite. , So the two pressures cancel each other out.

The filling material of sleeve-type thrust-free compensator. In the past, graphite and asbestos packing were mostly used as fillers, and liquid lubricants were used to seal water and vapor media. However, these lubricants flow under high pressure and high temperature and cause wrinkles in the packing. Shrinkage and hardening due to the shrinkage of the filling volume, it must be re-compacted frequently. In recent years, new types of materials have emerged continuously. Through experiments, we mainly use two types of fillers. The first type is a solid lubricant that uses solid polytetrafluorohexene (PTFE) to condense graphite and asbestos packing. The selection of samples requires the addition of liquid lubricants, which can minimize the shrinkage. The second type is to use flexible graphite as a filler. Lainuo stone ink as a sealing material has been widely used in dynamic and static sealing. Its use range is -196~600~C, has excellent corrosion resistance, and the friction coefficient is 0.1~0.150.