An energy-saving hydraulic escalator

Abstract

The invention discloses an energy-saving type hydraulic escalator which comprises a controller, a descending escalator part, an ascending escalator part, a first variable displacement motor, a second variable displacement motor and a reversing valve; the first variable displacement motor and the second variable displacement motor are each provided with a pump working condition and a motor working condition; the first variable displacement motor, the second variable displacement motor and the reversing valve form a hydraulic circuit; an output shaft of the first variable displacement motor is connected with a transmission shaft of the descending escalator part; an output shaft of the second variable displacement motor is connected with a transmission shaft of the ascending escalator part; when the descending speed of the descending escalator part is greater than a preset threshold, the reversing valve is positioned in a first station, an oil inlet of the reversing valve communicates with a pump working condition oil port of the first variable displacement motor, and an oil return port of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor; and when the descending speed of the descending escalator part is less than a preset threshold, the reversing valve is positioned in a second station, the oil inlet of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor, and the oil return port communicates with a pump working condition oil port of the first variable displacement motor. The gravitational potential energy of the descending escalator part is converted to pressure energy used for driving the ascending escalator part to operate, an energy conversion link is brief, the conversion efficiency is high, no additional space is occupied, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an energy-saving hydraulic escalator. Background technique [0002] With the development of the economy, the use of escalators in shopping malls, hotels, stations, airports, subways, hospitals and other public places continues to increase. In these applications, the escalator basically works continuously for more than 12 hours a day. In public transportation facilities such as stations and airports, escalators operate even more overnight. A group of ordinary escalators, the power is generally 8kW each, if working 12 hours a day, the annual power consumption can reach 70,000 kilowatts. Therefore, it is of great significance to study the energy-saving control technology of escalators for energy-saving and emission-reduction. [0003] The escalator can be divided into two working states of uplink and downlink. The uplink consumes electric energy to overcome the internal frictio...

AI Technical Summary

Problems solved by technology

However, the space layout of escalators is often very compact, the mechanical structure design is complex and difficult to realize, and the installation is difficult. In addition, the scheme of generating electricity through electrical devices is too expensive and has an impact on the power grid. When the energy is converted into mechanical energy again, the energy loss is high after the energy is converted many times.

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