Sealing component

Abstract

The invention is a sealing component, jacketed on a rotating shaft and having a sealing lip butted against the surface of the rotating shaft to isolate air from lubricant, where one side of the sealing lip facing external air is equipped with plural oil return grooves formed by salience, which are designed in two-segment turning mode, able to effectively block leakage lubricant and push the lubricant back to reduce lubricant loss.

Description

technical field [0001] The present invention relates to an element sheathed on a rotary shaft (r. tary shan) for isolating air and lubricating oil, more specifically, it refers to a sealing element with high oil return effect. Background technique [0002] Fig. 1 is a kind of lip type seal (lip type seal) 1, and this sealing element 1 has a radially protruding rubber lip 1a. The rubber lip 1a is pressed against the rotating shaft 2 and deformed so as to effectively isolate the air and lubricating oil. Herein, the two sides of the sealing element 1 are respectively an air side 101 and an oil side 102, The function of the sealing element 1 is to prevent the lubricating oil from the oil side 102 from overflowing to the air side 101 . [0003] Please refer to Figure 2, when the above-mentioned sealing element 1 is actually used, there will be an oil film 3 between the rubber lip 1a and the rotating shaft 2, the oil film 3 can not only have a sealing effect but also maintain the...

AI Technical Summary

Problems solved by technology

[0005] Please refer to Fig. 6 and Fig. 7 again. Through actual tests, it is found that when the number of oil return channels increases or the angle of oil return channels becomes smaller, the measured oil return rate is higher, but the oil return rate of the oil return channels is higher. If the groove angle is too small, it is not only difficult to process and manufacture, but it is also easier to add a large number of oil return grooves because the oil return grooves arranged along the circumference are too close to each other. Generally speaking, when the oil return groove angle θ of the oil return groove When the angle is less than 22.5 degrees, the above-mentioned deficiency will occur. Therefore, although the aforementioned sealing element 4 can reduce the loss of lubricating oil, there is still room for improvement in its oil return effect

Images