Negative compliance of energy-saving adaptive journal hydrostatic bearing with a restriction of the output lubricant stream

Non-contact sliding bearings lubricated with a liquid, which have a negative compliance of lubricating film, can be used in the machine-tool nodes to compensate of its elastic system deformation for improve the accuracy of processing. Known designs of such bearings, in which a decrease in ductility is due to the application of input consumption regulators (AGSB-CR), have high energy costs and instability characteristics of compliance. In this paper we consider the construction of a new category of adaptive bearings - journal hydrostatic bearing with a restriction of the output lubricant stream (AGSB-OS). The paper presents a mathematical model of support, according to analytical estimates obtained and considered a simplified method for determination of its static characteristics without the influence on them district overflows lubrication. It is shown that AGSB-OS compared with AGSB-CR consumes energy is 3-4 times smaller. It has more stable characteristics of negative compliance and a broader range of adaptive loads. It was also found that AGSB-OS with negative compliance is more economical, even in comparison with the conventional hydrostatic bearing.