液壓貨梯http://m.st-image.cn/是靠液壓缸提供動力驅動工作臺的升降，由結構原理和工作特點所決定，在工作臺攜帶著貨物和工件上升時，需要液壓缸向其提供驅動力，即液壓缸輸出能量，把機械(液壓)能轉換成勢能；而在工作臺攜帶著工件下降時，重物的勢能將被釋放出來。
Hydraulic freight elevator is driven by a hydraulic cylinder powered lift table, as determined by the characteristics of the structure and working principle, at the table when carrying cargo and artifacts to rise, the need to provide the driving force of the hydraulic cylinder, hydraulic cylinder that output energy, the mechanical (hydraulic) energy is converted to potential energy; in the table carrying the workpiece is decreased, the weight of the potential energy will be released.
因此液壓貨梯在設計其液壓系統時，應考慮勢能回收，把工作臺下降過程中釋放出的勢能轉變成液壓能，并在上升時加以利用，以減少無用功的消耗，提高能量的利用效率，并同時達成使系統運行平穩、工作安全可靠、結構簡單、效率高、便于設計和應用。
Therefore, in the design of hydraulic freight elevator hydraulic system, you should consider the potential recovery, the decline bench during the release of potential energy into hydraulic energy, and use it when you rise, in order to reduce the consumption of wasted effort to improve the efficiency of energy use, and Meanwhile reach so smooth system operation, safe and reliable, simple structure, high efficiency, ease of design and applications.
液壓貨梯http://m.st-image.cn/將工作臺下降過程中釋放出的勢能轉變為液壓能，并利用蓄能器將其儲存起來，實現能量回收。當工作臺再次上升時，蓄能器向液壓泵供油，使再次上升過程中液壓泵消耗的電動機功率減少，達到節能目的。因液壓貨梯只在垂直方向運動，其下降可借助重力實現，為簡化液壓缸結構、降低制造成本，采用了單作用缸；行程較大的升降機一般需采用兩個液壓缸，且要求兩缸同步。
The drop table hydraulic freight elevators released during hydraulic energy into potential energy, and the use of the accumulator to store it, to achieve energy recovery. When the table to rise again, to pump oil accumulator, so the rise again during the hydraulic pump motor power consumption reduction, to save energy. Due to hydraulic freight elevator movement only in the vertical direction, the decline can be realized by means of gravity, in order to simplify the structure of the hydraulic cylinder, lower manufacturing costs, the use of a single-acting cylinder; large lift travel generally requires the use of two hydraulic cylinders, and requires two-cylinder synchronous .
