| 摘要 |
FIELD: agricultural engineering; mobile machines equipped with hydraulic systems; materials handling machines, road building and other machines. SUBSTANCE: hydraulic distributor has safety-overflow section with overflow valve, restrictor and safety valve. Working section of hydraulic distributor has housing with pressure, return and load supply spaces. Spool has grooves for load supply flow and control channel flow. Load supply flow grooves have faces on spool bosses which provide stepless change of section of corresponding channels and load supply flows when spool is shifted from neutral position. Axial hole and load flow radial holes are made in spool body. Control channel groove, with spool in middle position, registers with radial holes of load supply flow. Hole in housing to supply control channel coincides with one of radial holes of main flow, and return hole of control channel is arranged between other radial holes. EFFECT: reduced metal usage, simplified design of hydraulic distributor. 3 cl, 5 dwg |
