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液体静压轴承结构是多样的,在我国广泛采用的定压式液体静压轴承中,有固定节流、可变节流、反馈可变节流等形式,反馈可变节流液体静压轴承,其油膜刚度较高,但结构比较复杂,使用受到一定限制。内反馈节流液体静压轴结构比较简单,但制造精度要求较高,由于主轴挠度的干扰,影响了内反馈节流液体静压轴承油膜刚度的提高,同时油腔部分的摩擦面较大,产生较大的温升,因此,也不够理想。我校在高速磨削与磨床的研究中,曾对外间隙节流液体静压轴承进行过试验研究,现已成功地用于MS1320高速外圆磨床产品,获得了良好的效果,对于中小型机床是非常适用的。但外间隙节流液体静压轴承属固定节流,轴承刚度的提高受到一定的限制,为了扩大外间隙
Hydrostatic bearing structure is diverse, in our country widely used constant pressure hydrostatic bearing, there is a fixed throttle, variable throttle, variable throttle feedback and other forms of feedback variable throttle hydrostatic bearings, the oil film Higher stiffness, but the structure is more complex, the use of certain restrictions. The internal feedback throttled hydrostatic shaft structure is relatively simple, but the manufacturing precision is higher, due to the interference of the main shaft deflection, the increase of the stiffness of the oil film in the hydrostatic bearing of the internal feedback throttling is affected, and the friction surface of the oil chamber part is larger, Larger temperature rise, therefore, is not ideal. Our high-speed grinding and grinding machine in the study, had foreign clearance hydrostatic hydrostatic bearings have been tested, has been successfully used in MS1320 high-speed cylindrical grinder products, and achieved good results for small and medium machine tools is Very suitable. But the outer gap throttling liquid hydrostatic bearing is a fixed throttling, bearing stiffness to be subject to certain restrictions, in order to expand the outer gap