扬州SKF轴承6215油封种类的结构原理

扬州SKF轴承骨架油封结构相对简单。它由油封体、加强骨架和自紧螺旋弹簧三部分组成。密封体按不同部位分为底部、腰部、边缘和密封唇。一般情况下，骨架油封在自由状态下的内径小于轴径，即具有一定的“干扰”。

The structure of Yangzhou SKF bearing skeleton oil seal is relatively simple. It consists of three parts: oil seal body, reinforced skeleton and self tightening coil spring. The sealing body is divided into bottom, waist, edge and sealing lip according to different parts. In general, the inner diameter of the skeleton oil seal in free state is smaller than that of the axle diameter, that is, it has a certain "interference".

因此，在扬州SKF轴承密封油封和轴之后，油封边缘处的压力和自紧螺旋弹簧的收缩力在轴上产生一定的径向力。经过一段时间后，压力会迅速下降甚至消失，因此弹簧可以随时补偿油封的自紧力。

Therefore, after the SKF bearing seal oil seal and shaft in Yangzhou, the pressure at the edge of the oil seal and the contraction force of the self tightening coil spring produce some radial force on the shaft. After a period of time, the pressure will drop rapidly or even disappear, so the spring can compensate the self tightening force of the oil seal at any time.

1，在自由状态下，扬州SKF轴承油封唇的内径小于轴径，且存在一定的干扰。

1, in the free state, the inner diameter of Yangzhou SKF bearing seal lip is smaller than the axle diameter, and there is a certain interference.

2，扬州SKF轴承安装后，油封边缘的干涉压力和自紧弹簧的收缩力在轴上产生一定的径向压力。

2, after the installation of SKF bearings in Yangzhou, the interference pressure on the edge of the oil seal and the contraction force of the self tightening spring produce a certain radial pressure on the shaft.

3，在工作时，扬州SKF轴承油封唇在径向压力下形成0.25～0.5mm宽的密封接触带。在润滑油压力作用下，油封与轴之间形成一薄层油膜。油膜受油表面张力的影响，在轴外缘和油封边缘形成月牙形表面，防止油溢出，起到密封作用。

3, when working, the Yangzhou SKF bearing oil seal lip forms a 0.25 to 0.5mm wide sealing contact belt under radial pressure. A thin oil film is formed between the oil seal and the shaft under the action of the lubricating oil pressure. The oil film is affected by the surface tension of the oil, forming a crescent shaped surface on the outer edge of the shaft and the edge of the oil seal to prevent oil overflow and play a sealing role.

由于油膜受油封和轴间油封的控制，扬州SKF轴承油膜具有流体润滑的特性。在液体张力作用下，油膜的刚度使油膜和空气接触月牙形表面，从而防止了工作介质的泄漏，从而实现了旋转轴的密封。

Because the oil film is controlled by oil seal and inter axle oil seal, Yangzhou SKF bearing oil film has the characteristics of fluid lubrication. Under the action of liquid tension, the stiffness of the oil film makes the oil film and air contact the crescent surface, thus preventing the leakage of the working medium, thus realizing the seal of the rotating shaft.

油封的密封性取决于密封面上油膜的厚度。厚度过厚，扬州SKF轴承油封泄漏，厚度过小。干摩擦、油封和轴磨损、密封唇和无油膜容易造成HEA。磨损和磨损。

The tightness of the oil seal depends on the thickness of the oil film on the sealing surface. Thickness is too thick, Yangzhou SKF bearing oil seal leaks, thickness is too small. Dry friction, oil seal and shaft wear, sealing lip and oil-free film are easy to cause HEA. Wear and wear.

因此，在安装扬州SKF轴承时，必须将油涂抹到密封圈上，以确保骨架密封与轴线垂直。如果不是垂直的，油封的密封唇会从轴上排出润滑油，并导致密封唇的过度磨损。在操作中，壳体中的润滑剂稍微释放，从而达到在密封表面上形成油膜的理想状态。

Therefore, when installing the SKF bearing in Yangzhou, the oil must be applied to the sealing ring to ensure that the skeleton seal is perpendicular to the axis. If it is not vertical, the sealing lip of the oil seal will discharge the lubricating oil from the shaft and cause excessive wear of the sealing lip. In operation, the lubricant in the shell is released slightly, so as to achieve the ideal state of forming oil film on the sealing surface.

文章来自：扬州SKF轴承 www.wh-skf.com

The article comes from: Yangzhou SKF bearing www.wh-skf.com

文章来自：扬州INA轴承 www.ina-china.cn

The article comes from: Yangzhou INA bearing www.ina-china.cn

文章来自：扬州NSK轴承 www.klbbearings.com

The article comes from: Yangzhou NSK bearing www.klbbearings.com

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