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首页> 外文期刊>Tribology International >Theoretical study of solid back-up rings for elastomeric seals in hydraulic actuators
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Theoretical study of solid back-up rings for elastomeric seals in hydraulic actuators

机译：液压执行器弹性体密封的固体支撑环的理论研究

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摘要

The use of back-up rings to support elastomeric seals in high-pressure hydraulic systems is well established in the industry. However, little is known about the operation of such devices and how they affect or interfere in the sealing mechanism of the seals they accompany. This study is an attempt to model solid, soft back-up rings in terms of elastohydrodynamic lubrication and establish their exact role in a sealing system in terms of sealing performance (leakage). The model is applied on a typical case of a linear hydraulic actuator for a wide range of sealed pressures (1-35 MPa) and operating temperatures (-55 to +135℃), and with one ring installed on the low-pressure side of the actuator. A system of a rubber seal and a properly selected and installed back-up ring is shown to be often significantly more efficient in terms of fluid leakage than the seal without the back-up ring. A study reveals the effect of various parameters of the ring (e.g. the elastic modulus and the surface roughness) on the sealing mechanism and shows the optimum selection to minimize leakage.
机译：在工业上已经广泛使用支撑环来支撑高压液压系统中的弹性体密封件。然而，关于这种装置的操作以及它们如何影响或干扰它们所伴随的密封件的密封机构的知之甚少。这项研究旨在对弹性软动力润滑方面的固态软支承环进行建模，并根据密封性能（泄漏）确定其在密封系统中的确切作用。该模型适用于线性液压执行器的典型情况，适用于各种密封压力（1-35 MPa）和工作温度（-55至+ 135℃），并且在低压侧安装了一个环。执行器。橡胶密封件和正确选择并安装的支撑环组成的系统在流体泄漏方面通常比没有支撑环的密封系统效率更高。一项研究揭示了密封环的各种参数（例如弹性模量和表面粗糙度）对密封机构的影响，并显示了使泄漏最小化的最佳选择。

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