FIELD: machine building.
SUBSTANCE: invention relates to mechanical assembly of two mechanical parts rotating relative to each other and allowing to obtain self-aligning hydrostatic bearing. Self-aligning plain bearing comprises first part with cylindrical cavity, second part (34) with at least one cylindrical part inserted into cylindrical cavity of first part with gap, separating cylindrical part from wall of cylindrical cavity and enabling relative rotation of first and second parts; and lubrication distribution system (37, 38) configured to feed liquid lubricant into said clearance to produce a hydrostatic bearing. On first surface (34s), which is inner surface of cylindrical cavity of first part or outer surface of cylindrical part of second part, there are at least two holes (39a, 39b) for supply of lubricant, which are spaced from each other by at least 120° around main first surface axis (F) (34s). On first surface (34s) there is at least one annular groove (40a) extending circumferentially from the point near the first lubrication feed opening (39a) by at least 100 ° in the direction of relative rotation of second surface (33) relative to first surface (34s), wherein the annular groove front end is separated from the first lubricant feed opening such that first opening (39a) does not extend to annular groove (40a) bottom, and second annular groove (40b) extending circumferentially in direction of relative rotation of second surface (33) relative to first surface (34s) from point near second feed opening (39b) for at least 100°.
EFFECT: technical result is creation of assembly, capable of supporting and balancing hydrostatic bearing without any rolling elements between two parts, and can perform this automatically and dynamically; in particular, this reduces risk of contact between two parts regardless of displacement from centre, which facilitates centring of rotating part relative to its support; in such mechanical assembly rotary part can rotate smoothly, that is without shaking and with minimum loss of energy.
11 cl, 12 dwg
