| 摘要 |
<p>In the energy efficient hydraulic elevator driving system, a substantially constant amount of pressurized fluid is displaceable within a closed system between two hydraulic jacks (10, 20) with a piston-cylinder combination interconnected by a piping system. The translational movement of a shaft (22) engaging the piston (24) in the first cylinder (28) is transmitted through fluid to the second cylinder (14) to effect movement of the hydraulic jack (12) for lowering and raising the elevator car (100). A counter-weight is provided at the opposite end of the shaft (22) which constantly compresses the pressurized fluid in the first cylinder (29) and balances the weight of the elevator car (100) which is supported by a hydraulic jack plunger (12). Therefore, only a relatively small amount of additional energy is necessary to lower and raise the elevator car (106).</p> |
