Research on influence of oil cavity shapes on carrying capacity of heavy hydrostatic bearing

Carrying capacity of heavy hydrostatic bearing is one of important indicators reflecting its performance. Aiming at the problem of influence of oil cavity shapes on carrying capacity of heavy hydrostatic bearing, use finite volume method to simulate gap film pressure field of heavy hydrostatic bearing with rectangular-shaped, sector-shaped, oval-shaped, and I-shaped cavity and study pressure field distribution law of four cavity shapes on the conditions of the same rotating speed, cavity depth and oil cavity area, then optimize oil cavity structure. Results show that pressure field distribution law of four cavity shapes is basically identical, but four kinds of cavities possess different carrying capacity which is respectively arranged as oval-shaped, sector shaped rectangular-shaped, and I-shaped cavity according to size. Simulation results and theoretical analysis are proved to have consistency, which provide valuable theoretical basis for selecting cavity shapes for heavy hydrostatic bearing in practical productions.