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Let’s take a closer look at the structure of the sleeve compensator.
Release time:
Sep 02,2022
Detailed Explanation of the Principle and Structure of Sleeve Compensators: The sleeve compensator is a commonly used type of expansion joint in thermal pipelines. As is well known, the design, installation, and operation of steam pipelines require careful consideration of thermal expansion and the resulting thermal thrust forces. Due to limitations in installation space, traditional square compensators (or square expansion joints) are gradually being replaced by sleeve-type compensators. Sleeve compensators offer distinct economic advantages, including compact size, high thermal compensation capacity, and low resistance to hot water flow.
Detailed Explanation of the Principle and Structure of Sleeve Compensators: The sleeve compensator is a commonly used type of expansion joint device in thermal pipelines. As is well known, the design, installation, and operation of steam pipelines require careful consideration of thermal expansion and the resulting thermal thrust forces in the pipes. Due to limitations in installation space, traditional square compensators (or square expansion joints) used in conventional pipelines have gradually been replaced by sleeve-type compensators. Sleeve compensators offer distinct economic advantages, including compact size, high thermal compensation capacity, and low resistance to hot water flow.
The sleeve compensator is suitable for working pressures ranging from 0 to 2.5 MPa and operating temperatures of -40 to 400℃ in thermal network pipelines. Typically, it can operate without leakage for 8 to 10 years. The structure is shown in the figure below. A detailed explanation of the principle and construction of the sleeve compensator: The sleeve-type compensator consists of two main parts—the outer sleeve and the inner sleeve. The inner casing is sealed and hermetically enclosed by a filling material.
The packing material is made of flexible graphite, which offers a wide temperature range (-190 to 1600°C), excellent toughness, high elasticity, superior sealing performance, good self-lubricating properties, and a low coefficient of friction (typically μ = 0.12–0.15). As a result, the GSJ sleeve compensators exhibit excellent adaptability. The construction of the sleeve compensator indicates that thermal contraction of the heat pipe is compensated by the axial movement of the inner sleeve AD within the outer sleeve, thereby accommodating the resulting expansion.
To ensure that the compensator neither leaks nor fails to function properly, it must be concentric with the pipes in the heating network. To this end, one side of the outer sleeve should be designed as a fixed end, while the other side of the inner sleeve should be equipped with a robust guiding seat, ensuring that the inner sleeve can freely slide and expand or contract concentrically during operation.
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