编织热密封组件的高温密封性能

为研究编织热密封组件直接应用于高温工况环境下的密封性能,选用三维双股编织绳和双层三股编织弹簧管2种密封组件。基于多孔介质的Kozeny-Carman方程,建立了2种密封组件的密封泄漏模型。采用高温密封试验分别对其进行了高温密封性能测试,得到了2种高温密封组件在不同压差、不同工况温度环境下的泄漏量,验证了模型的有效性。研究结果表明:三维双股编织绳和双层三股编织弹簧管密封组件的泄漏量均随着压差的不断增加而逐渐变大,而随着温度的增加逐渐降低。在相同工况条件下,双层三股编织弹簧管密封组件的泄漏量均小于三维双股编织绳。研究结果可为适用于高温环境密封结构的选择提供参考依据。

High-temperature sealing performance of braided heat-sealed components

In order to study the sealing performance of braided heat-sealing components directly applied to high-temperature environments, two types of sealing components are selected: three-dimensional double-strand braided rope and double-layer three-strand braided spring tube. Based on the Kozeny-Carman equation of porous media, two sealing leakage models of the sealing components are established. The high-temperature sealing performance was tested separately by high-temperature sealing test, and the leakage of two high-temperature sealing components under different pressure differences and different working conditions and temperatures were obtained, which verified the validity of the model. The research results show that the leakage of the sealing components of the three-dimensional double-strand braided rope and the double-layer three-stranded spring tube gradually increases with the continuous increase of the pressure difference, and gradually decreases with the increase of the temperature. Under the same working conditions, the leakage of the double-layer three-strand braided spring tube seal assembly is less than that of the three-dimensional double-strand braided rope. The research results can provide a reference for the selection of sealing structures suitable for high-temperature environments.