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普通机械密封属于接触式端面密封,其端面压紧力大于推开力,端面之间的润滑处于边界润滑或半液体润滑状态。受控膜机械密封属于非接触式端面密封,其端面间隙(流体薄膜)控制在某一定值下运行。此时,端面压紧力等于推开力,端面之间具有一层完整的连续的流体薄膜。根据建立流体润滑方式的不同,受控膜机械密封可分为流体静力式及流体动力式两类。从摩擦副端面流体膜是液体膜还是气体膜,又
Ordinary mechanical seal is a contact type face seal, the end face pressing force greater than the push-out force, the lubrication between the end face in the boundary lubrication or semi-liquid lubrication. Controlled mechanical seal is a non-contact surface seal, the end gap (fluid film) control at a certain value of the operation. At this point, the end face pressing force is equal to the pushing force, there is a layer of complete continuous fluid film between the end faces. According to the establishment of different ways of fluid lubrication, controlled mechanical seal can be divided into two types of hydrostatic and hydrodynamic. From the friction side of the fluid film is a liquid film or gas film, and again