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我厂锻造车间的蒸汽锤原设计使用金属活塞环,基于金属活塞环存在诸多缺点,目前已逐渐被聚四氟乙烯活塞环(以下简称 F_4环)所代替。由于 F_4硬度较低,摩擦系数很小,故对汽缸壁几乎没有磨损;又因为 F_4环的填充剂中含有石墨粉和二硫化钼物质,所以它本身有自润滑作用,可以省去原汽锤上的润滑装置。经过几年来 F_4环在汽锤上的实际应用,我们认为要保证 F_4环在汽锤中的正常工作,取得较好效果,必须注意以下几个问题:
The design of the steam hammer originally used in the forging workshop of our factory is based on the metal piston ring. Due to the disadvantages of the metal piston ring, it has been gradually replaced by Teflon piston ring (hereinafter referred to as F_4 ring). As F_4 hardness is low, the friction coefficient is very small, so there is almost no wear on the cylinder wall; and because F_4 ring filler contains graphite powder and molybdenum disulfide material, so it has its own lubrication, can save the original hammer On the lubrication device. After several years of practical application of the F_4 ring on the hammer, we believe that to ensure the normal operation of the F_4 ring in the hammer, to achieve better results, we must pay attention to the following questions: