FIELD: systems for controlling rising and descending of cabin of hydraulically driven elevator.
SUBSTANCE: unit includes two distributing valves for regulating oil flow for hydraulic system fed from tank to rising cylinder for driving cabin of elevator and (or) from said rising cylinder to tank. When cabin moves upwards oil for hydraulic system is fed by means of pump driven by electric motor from said tank through distributing valves to rising cylinder. When cabin moves downwards oil for hydraulic system through unit of distributing valves is fed to reservoir and pump is not energized. According to invention unit of distributing valves has in addition single controlled distributing valve that operates as non-return valve and also as proportionally controlled hydraulic distributor. All distributing valves have one common flow limiting member that may be shifted relative to seat. Said flow limiting member is subjected to action of return spring and also to action of additional valve driven by means of electrically selected proportionally controlled magnet.
EFFECT: simplified design, reduced cost of making unit having no regulation members.
18 cl, 18 dwg
