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静压气体轴承的类别按照供气形式分为:1.多孔轴承(Multi-holes feeding),2.多孔质轴承(Porous bearing),3.狭缝供气轴承(Slot-fed bearing),4.表面节流轴承(Surface restriction).多孔质轴承采用多孔质材料作为其轴承表面和节流器,整个轴承面均布微小的供气孔,气体通过多孔质材料由供气区进入轴承间隙.用于多孔质轴承的材料包括以青铜、铝、铅、钛、锡等为主的金属系材料和以石墨、碳纤维、氧化铝、碳化硅等为主的非金属系材料,并根据多孔质材料构成轴承面的形式,轴承面可分为:原样使用多孔质材料的“表面孔无阻塞”和由于机械加工而使其表面小孔阻塞的“表面孔阻塞”两种类型.由于多孔质材料的特性,压力气体通过时产生的节流效应比一般其它供气形式的轴承效果要好,因此大大提高多孔质轴承的承载能力,并且由于轴承间隙——侧是透气性材料,在轴承动载时,允许气体在其中流动,故多孔质轴承具有更好的阻尼特性.
The types of static pressure gas bearings are divided according to the gas supply form: 1. Multi-holes feeding, 2. Porous bearing, 3. Slot-fed bearing, Surface restriction. Porous bearings are made of porous material for their bearing surfaces and restrictors. The entire bearing surface is covered with tiny air supply holes through which the gas enters the bearing clearance from the air supply area. The material of the porous bearing includes a metal-based material such as bronze, aluminum, lead, titanium, and tin, and a nonmetallic material such as graphite, carbon fiber, alumina, silicon carbide and the like and a bearing made of a porous material Surface form, the bearing surface can be divided into: the original use of porous materials, “the surface of the hole non-blocking” and due to mechanical processing and the surface of the hole blocking the “surface hole blocking” two types due to the characteristics of porous materials, The throttling effect of the pressure gas passing through is better than that of other gas supply bearings, thus greatly improving the bearing capacity of the porous bearing, and since the bearing gap - the side is the air-permeable material, when the bearing is under dynamic load, Gas flow therein, so that the porous bearing having better damping characteristics.