Hydraulic power system for variable counterweight and lifting system with same

Abstract

The invention discloses a hydraulic power system for a variable counterweight and a lifting system with same. The hydraulic power system comprises a transmission speed change mechanism in transmissionconnection with a driving wheel, and further comprises a hydraulic motor set, a first liquid storage device and a second liquid storage device, wherein the hydraulic motor set comprises at least onehydraulic motor; a height difference is formed between the first liquid storage device and the second liquid storage device; the first liquid storage device communicates with a first joint of the hydraulic motor set through a first pipeline; and the second liquid storage device communicates with a second joint of the hydraulic motor set through a second pipeline. The hydraulic power system furthercomprises a reversing part; the reversing part is provided with at least two working positions; the reversing part is configured as follows: in the first working position, the first joint is a liquidinlet, and the second joint is a liquid outlet, so that the hydraulic motor set works in a motor mode; and in the second working position, the first joint is a liquid outlet, and the second joint isa liquid inlet, so that the hydraulic motor set works in a pump mode. The hydraulic power system is used for balancing gravity unbalance caused by load change, and reduces the power loss of a tractionmachine.

Description

technical field [0001] The invention relates to the technical field of lifting machinery, in particular to a hydraulic power system for variable counterweight and a lifting system with the hydraulic power system. Background technique [0002] The current elevator system is usually equipped with a fixed counterweight to balance the load or traction power. There are also some elevator systems, such as escalators, that do not have a counterweight, which can also be understood as a fixed counterweight, which is zero. [0003] In practical applications, because the load of the elevator system changes, there is often an imbalance between the load and the fixed counterweight, so the traction machine not only needs to provide traction power, but also needs to provide a balance force for the load and counterweight, which is not conducive to the elevator. energy saving, and the requirements for the traction machine are also high. [0004] In addition to the above-mentioned elevator s...

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Problems solved by technology

[0005] Therefore, how to design a hydraulic power system that can solve the power loss problem of the lifting system due to the mismatch between the load and the counterweight and ensure the stable operation of the lifting system is a technical problem that those skilled in the art need to solve at present

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