How a Mechanical Seal Works
2024-11-08
How a Mechanical Seal Works
A mechanical seal works though the use of two very flat lapped faces which make it difficult for leakage to occur. One face does not rotate with the shaft (stationary), whereas the second one rotates with the shaft (rotary).
As the faces rub together, a fluid film migration between the 2 faces is applied for cooling and lubrication purposes. The pumped fluid will ideally weep between the faces, entering as a liquid and remaining until it is vaporised as it reaches atmosphere.
It must be pointed out at this point that all mechanical seals leak some very small amounts of vapor and consqequently, even with the best mechanical seal design, a small portion of the pumped fluid is lost.
机械密封的工作原理
机械密封的工作原理是使用两个非常平坦的搭接面，这使得泄漏难以发生。一个面不随轴旋转（静止），而另一个面随轴旋转（旋转）。
当两个面相互摩擦时，两个面之间会产生流体膜迁移，以达到冷却和润滑的目的。泵送的流体理想情况下会在两个面之间渗出，以液体形式进入并停留，直到到达大气时蒸发。
必须指出的是，所有机械密封都会泄漏少量蒸汽，因此，即使采用最佳机械密封设计，也会损失一小部分泵送流体。
机械密封的工作原理是使用两个非常平坦的搭接面，这使得泄漏难以发生。一个面不随轴旋转（静止），而另一个面随轴旋转（旋转）。
当两个面相互摩擦时，两个面之间会产生流体膜迁移，以达到冷却和润滑的目的。泵送的流体理想情况下会在两个面之间渗出，以液体形式进入并停留，直到到达大气时蒸发。
必须指出的是，所有机械密封都会泄漏少量蒸汽，因此，即使采用最佳机械密封设计，也会损失一小部分泵送流体。
As shown in the figure above, when the shaft 9 rotates, the rotor 3 is driven to rotate by the set screw 10 and the spring 2. The anti-rotating pin 6 is fixed on the end cover 4 to prevent the stator 7 from rotating. When the seal face is worn, the rotor 3 together with rotor secondary seal 8 moves slightly in the axial direction under the push of the spring 2 to achieve a certain compensation ability, so it is called a compensation ring. The stator does not have compensation ability, so it is called a non-compensation ring. Through different structural designs, the compensation ring can be borne by the rotor or the stator. The assembly composed of the compensation ring, elastomer element and auxiliary seal is called a compensation ring assembly.
如上图示，当旋转轴9旋转时，通过紧定螺钉10和弹簧2带动动环3旋转。防转销6固定在静止的压盖4上，防止静环7转动。当密封端面磨损时，动环3连同动环密封圈8在弹簧2推动下，沿轴向产生微小移动，达到一定的补偿能力，所以称补偿环。静环不具有补偿能力，所以称非补偿环。通过不同的结构设计，补偿环可由动环承担，也可由静环承担。由补偿环、弹性元件和副密封等构成的组件称补偿环组件。
For more information about mechanical seals or assistance with your specific requirements, feel free to contact us. Our team of experts is here to help you find the perfect sealing solution for your needs.
如需有关机械密封的更多信息或满足您的特定要求，请随时联系我们。我们的专家团队将帮助您找到适合您需求的完美密封解决方案。
如需有关机械密封的更多信息或满足您的特定要求，请随时联系我们。我们的专家团队将帮助您找到适合您需求的完美密封解决方案。
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