ACTIVE ELEVATOR CAR BALANCE SYSTEM

摘要

An elevator system includes an elevator car that moves within a hoistway and supports a fluid distribution tank (14) having balancing tank (20) and centrally located reservoir (22) interconnected by way of fluid conduits (24). Sensors (38) within the hoistway (28) detect a position of the elevator car (12), and sensors (40) communicate pressure on rollers (32) and communicate that information to a controller (18). The controller (18) actuates a fluid moving device (16,60) to distribute fluid (26) between the balance tanks (20) to counteract unbalanced forces on the elevator car (12).