The invention relates to the technical field of precision and ultra-precision
machining, and provides a
hydrostatic pressure guide rail device which comprises a guide rail and a sliding block which are in sliding connection. A sliding block body oil
inlet channel and a sliding block body oil
return channel are arranged in the sliding block; the sliding block comprises a sliding block body and a pair of bearing strips, an opening groove is formed in the bottom end of the sliding block body, the guide rail and the pair of bearing strips are located in the opening groove, one side of each bearing strip is fixedly connected with the sliding block body, and the other side of each bearing strip is slidably connected with the guide rail; the combination faces of the sliding block body, the bearing strip and the guide rail are matched, and a gap between the bearing strip and the guide rail forms an
oil film bearing area. After the sliding block is designed in a split mode, the sliding block body plays a role in installation, the bearing strips play roles in static pressure supporting and
oil film gap adjustment, the difficulty in manufacturing, measuring, assembling and adjusting the static pressure sliding block is lowered, the sliding block bodies with different opening sizes and the bearing strips with different thicknesses can be freely arranged, and therefore the static pressure sliding block can be conveniently assembled and disassembled. The precise adjustment of the
oil film gaps is realized, and the consistency of the oil film gaps between the sliding blocks is ensured.