阅读说明：本技术 一种天桥用能量回收式电梯 (Energy recovery type elevator for overpass ) 是由 吴子英 户哲 于 2021-07-28 设计创作，主要内容包括：本发明公开的一种天桥用能量回收式电梯,包括纵向并列设置的两组导轨,每组导轨内均滑动配合设置有一轿厢,每组导轨内的顶端和底端对应轿厢分别设置有顶部液压缸和底部液压缸,两组导轨之间的上方设置有曳引轮,曳引轮上绕有两端分别连接至两个轿厢顶端的曳引绳,曳引轮的中心同轴穿过有套设制动器的传动轴,传动轴两端分别连接有双向定量泵和双向定量液压马达,双向定量泵、双向定量液压马达、制动器、顶部液压缸和底部液压缸上分别通过液压油管共同连通有液压系统。本发明一种天桥用能量回收式电梯,解决了现有天桥电梯运行时重力势能被浪费的问题,从而实现重力势能的利用以及电能的最低消耗。(The invention discloses an energy recovery type elevator for an overpass, which comprises two groups of guide rails which are longitudinally arranged in parallel, wherein a lift car is arranged in each group of guide rails in a sliding fit manner, the top end and the bottom end in each group of guide rails are respectively provided with a top hydraulic cylinder and a bottom hydraulic cylinder corresponding to the lift car, a traction sheave is arranged above the two groups of guide rails, traction ropes with two ends respectively connected to the top ends of the two lift cars are wound on the traction sheave, the center of the traction sheave coaxially penetrates through a transmission shaft sleeved with a brake, two ends of the transmission shaft are respectively connected with a bidirectional constant delivery pump and a bidirectional constant delivery hydraulic motor, and the bidirectional constant delivery pump, the bidirectional constant delivery hydraulic motor, the brake, the top hydraulic cylinder and the bottom hydraulic cylinder are respectively and jointly communicated with a hydraulic system through hydraulic oil pipes. The invention relates to an energy recovery type elevator for an overpass, which solves the problem that gravitational potential energy is wasted when the existing overpass elevator operates, thereby realizing the utilization of the gravitational potential energy and the lowest consumption of electric energy.)

1. An energy recovery type elevator for an overpass is characterized by comprising two groups of guide rails (1) which are longitudinally arranged in parallel, a car is arranged in each group of guide rails (1) in a sliding fit manner, the top end and the bottom end in each group of guide rails (1) are respectively provided with a top hydraulic cylinder and a bottom hydraulic cylinder corresponding to the cars, a traction sheave (8) is arranged above the space between the two groups of guide rails (1), traction ropes (9) with two ends respectively connected to the top ends of the two cars are wound on the traction sheave (8), a transmission shaft (11) sleeved with a brake (10) coaxially penetrates through the center of the traction sheave (8), two ends of the transmission shaft (11) are respectively connected with a bidirectional constant delivery pump (12) and a bidirectional constant delivery hydraulic motor (13), the bidirectional constant delivery pump (12), the bidirectional constant delivery hydraulic motor (13), the brake (10), the top hydraulic cylinder and the bottom hydraulic cylinder are respectively and jointly communicated with a hydraulic system through hydraulic oil pipes (16).

2. The energy recovery type elevator for the overpass is characterized in that the hydraulic system comprises an oil tank communicated with the inlet end of the bidirectional constant delivery pump (12) and an energy storage speed regulation valve (18) communicated with the outlet end of the bidirectional constant delivery pump (12), the inlet end and the outlet end of the bidirectional constant delivery pump (12) are respectively provided with an energy storage one-way valve, the other end of the energy storage speed regulation valve (18) is communicated with a heavy hammer energy accumulator (24), the inlet end and the outlet end of the bidirectional constant delivery pump (12) are also communicated with sequence valves in parallel, the control ends of the sequence valves are respectively communicated with the outlet ends of the two top hydraulic cylinders through hydraulic oil pipes (16), the control ends of the sequence valves are respectively communicated with the two unloading valves through the hydraulic oil pipes (16) and communicated with the inlet ends of the two bottom hydraulic cylinders, and the control ends of the two unloading valves are respectively communicated with the outlet ends of the two bottom hydraulic cylinders; the hydraulic control valve further comprises a K-type three-position four-way reversing valve (39) with one side communicated with an inlet and an outlet of the bidirectional quantitative hydraulic motor (13), a closed end at the other side of the three-position four-way reversing valve (39) is communicated with the heavy hammer energy accumulator (24) through an energy release speed regulating valve (40) and an energy release one-way valve (41), an open end at the other side of the three-position four-way reversing valve (39) is communicated with an oil tank, two control ends of the three-position four-way reversing valve (39) are respectively communicated with outlet ends of the two top hydraulic cylinders, and two control ends of the three-position four-way reversing valve are also respectively communicated with inlet ends of the two unloading valves.

3. The energy recovery elevator for the overpass according to claim 2, wherein the weight accumulator (24) is connected to a one-way constant displacement pump (25) and to an outlet thereof.

4. An energy recovery elevator for a platform bridge according to claim 3, characterized in that the outlet ends of the two bottom hydraulic cylinders are also connected to the brake (10) through hydraulic oil pipes (16), and the brake (10) is communicated with an electromagnetic unloading valve (37) and an inlet end thereof.

5. The energy recovery type elevator for the overpass according to claim 4, wherein the inlet end of the top hydraulic cylinder, the inlet end of the bottom hydraulic cylinder, the outlet end of the unloading valve, the inlet end of the one-way constant delivery pump (25), and the outlet end of the electromagnetic unloading valve (37) are all communicated to the oil tank.

6. The energy recovery elevator for the overpass according to claim 1, wherein a reducer (15) is connected between both ends of the transmission shaft (11) and the bidirectional fixed displacement pump (12) and the bidirectional fixed displacement hydraulic motor (13) through a coupling (14).

Technical Field

The invention belongs to the technical field of energy recovery equipment, and particularly relates to an energy recovery type elevator for an overpass.

Background

The urban traffic in China develops rapidly, the overpass therewith becomes an indispensable part of the urban traffic, and along with the pursuit of people for high-quality life and the aggravation of aging of population, the overpass elevator is bound to become an indispensable living facility for the life of people. The elevator is taken as high energy consumption equipment, and along with the increase of the using number of the overpass elevator, the consumption of electric energy is increased, and further, the environmental pollution is caused. When people take the elevator to go downstairs, a large amount of gravitational potential energy is wasted, and if the energy can be recycled, the energy consumption of the elevator can be reduced.

Disclosure of Invention

The invention aims to provide an energy recovery type elevator for an overpass, which solves the problem that gravitational potential energy is wasted when the existing overpass elevator operates.

The technical scheme adopted by the invention is as follows: the utility model provides an energy recuperation formula elevator for overline bridge, including vertical two sets of guide rails that set up side by side, equal sliding fit is provided with a car in every group guide rail, top and bottom in every group guide rail correspond the car and are provided with top pneumatic cylinder and bottom pneumatic cylinder respectively, top between two sets of guide rails is provided with the traction sheave, around having both ends to be connected to the towline on two car tops respectively on the traction sheave, the coaxial transmission shaft that has the cover to establish the stopper that passes in the center of traction sheave, the transmission shaft both ends are connected with two-way constant delivery pump and two-way quantitative hydraulic motor respectively, two-way constant delivery pump, two-way constant delivery hydraulic motor, the stopper, it has hydraulic system to communicate jointly through hydraulic pressure oil pipe on top pneumatic cylinder and the bottom pneumatic cylinder respectively.

The present invention is also characterized in that,

the hydraulic system comprises an oil tank communicated with the inlet end of the bidirectional constant delivery pump and an energy storage speed regulating valve communicated with the outlet end of the bidirectional constant delivery pump, the inlet end and the outlet end of the bidirectional constant delivery pump are both provided with energy storage one-way valves, the other end of the energy storage speed regulating valve is communicated with a heavy hammer energy accumulator, the inlet end and the outlet end of the bidirectional constant delivery pump are also communicated with sequence valves in parallel, the control ends of the sequence valves are respectively communicated with the outlet ends of the two top hydraulic cylinders through hydraulic oil pipes, the control ends of the sequence valves are respectively communicated with the two unloading valves through the hydraulic oil pipes and communicated with the inlet ends of the two unloading valves, and the control ends of the two unloading valves are respectively communicated with the outlet ends of the two bottom hydraulic cylinders; the hydraulic control system also comprises a K-type three-position four-way reversing valve, one side of the K-type three-position four-way reversing valve is communicated with the inlet and the outlet of the two-way quantitative hydraulic motor, the other side closed end of the three-position four-way reversing valve is communicated with the heavy hammer energy accumulator through an energy release speed regulating valve and an energy release one-way valve, the other side open end of the three-position four-way reversing valve is communicated to an oil tank, two control ends of the three-position four-way reversing valve are respectively communicated to the outlet ends of the two top hydraulic cylinders, and the two control ends of the three-position four-way reversing valve are also respectively communicated to the inlet ends of the two unloading valves.

The weight accumulator is communicated with a one-way constant delivery pump and is communicated with the outlet end of the weight accumulator.

The outlet ends of the two bottom hydraulic cylinders are also communicated to a brake through hydraulic oil pipes, and the brake is communicated with an electromagnetic unloading valve and is communicated with the inlet end of the electromagnetic unloading valve.

The inlet end of the top hydraulic cylinder, the inlet end of the bottom hydraulic cylinder, the outlet end of the unloading valve, the inlet end of the one-way constant delivery pump and the outlet end of the electromagnetic unloading valve are all communicated to the oil tank.

And two ends of the transmission shaft are respectively connected with the bidirectional constant delivery pump and the bidirectional constant delivery hydraulic motor through the speed reducer.

The invention has the beneficial effects that: the energy recovery type elevator for the overpass has the function of recovering energy, when people on one side take the elevator to go down and people on the other side take the elevator to go up, the people going down can pull the people going up due to the gravity difference; meanwhile, energy generated by the difference of the gravitational potential energy of the up-going and down-going people can be recovered and stored, and when the gravity of the down-going people cannot provide enough tension for the up-going people, the stored energy is released to compensate the tension difference so as to meet the operation requirement of the elevator, so that the utilization of the gravitational potential energy and the lowest consumption of electric energy are realized.

Drawings

Fig. 1 is a schematic structural view of an energy recovery type elevator for an overpass of the present invention;

fig. 2 is a plan view of an energy recovery type elevator for an overpass of the present invention;

fig. 3 is a schematic structural view of a hydraulic system in an energy recovery type elevator for an overpass according to the present invention.

In the figure, 1, a guide rail, 2, a left car, 3, a right car, 4, a left top hydraulic cylinder, 5, a right top hydraulic cylinder, 6, a left bottom hydraulic cylinder, 7, a right bottom hydraulic cylinder, 8, a traction sheave, 9, a traction rope, 10, a brake, 11, a transmission shaft, 12, a bidirectional constant displacement pump, 13, a bidirectional constant displacement hydraulic motor, 14, a coupler, 15, a speed reducer, 16, a hydraulic oil pipe, 17, a first oil tank, 18, an energy storage speed regulating valve, 19, a first energy storage one-way valve, 20, a second energy storage one-way valve, 21, a third energy storage one-way valve, 22, a fourth energy storage one-way valve, 23, a fifth energy storage one-way valve, 24, a heavy hammer energy accumulator, 25, the one-way constant displacement pump, 26, a second oil tank, 27, a first sequence valve, 28, a second sequence valve, 29, a third oil tank, 30, a fourth oil tank, 31, a first unloading valve, 32, a fifth oil tank, 33, a second unloading valve, 34. the energy-saving control system comprises a sixth oil tank, 35, a seventh oil tank, 36, an eighth oil tank, 37, an electromagnetic unloading valve, 38, a ninth oil tank, 39, a three-position four-way reversing valve, 40, an energy-releasing speed regulating valve, 41, an energy-releasing one-way valve and 42, a tenth oil tank.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides an energy recovery type elevator for an overpass, which comprises two groups of guide rails 1 longitudinally arranged in parallel, wherein a car, namely a left car 2 and a right car 3, is arranged in each group of guide rails 1 in a sliding fit manner, the top end and the bottom end of each group of guide rails 1 are respectively provided with a left top hydraulic cylinder 4, a right top hydraulic cylinder 5, a left bottom hydraulic cylinder 6 and a right bottom hydraulic cylinder 7 corresponding to the left car 2 and the right car 3, a traction sheave 8 is arranged above the two groups of guide rails 1, traction ropes 9 with two ends respectively connected to the top ends of the two cars are wound on the traction sheave 8, the center of the traction sheave 8 coaxially penetrates through a transmission shaft 11 sleeved with a brake 10, two ends of the transmission shaft 11 are respectively connected with a bidirectional constant delivery pump 12 and a bidirectional constant delivery hydraulic motor 13, two ends of the transmission shaft 11 are respectively connected with the bidirectional constant delivery pump 12 and the bidirectional constant delivery hydraulic motor 13 through a coupler 14 to form a speed reducer 15, the bidirectional constant displacement pump 12, the bidirectional constant displacement hydraulic motor 13, the brake 10, the top hydraulic cylinder and the bottom hydraulic cylinder are respectively and jointly communicated with a hydraulic system shown as a dotted line position in figure 1 through hydraulic oil pipes 16.

As shown in fig. 3, the hydraulic system includes a first oil tank 17 connected to the inlet end of the bidirectional fixed displacement pump 12, and an energy-storage speed-regulating valve 18 connected to the outlet end of the bidirectional fixed displacement pump 12, the inlet end and the outlet end of the bidirectional fixed displacement pump 12 are both provided with an energy-storage one-way valve, which includes a first energy-storage one-way valve 19, a second energy-storage one-way valve 20, a third energy-storage one-way valve 21, a fourth energy-storage one-way valve 22, and a fifth energy-storage one-way valve 23 located behind the energy-storage speed-regulating valve 18, the other end of the energy-storage speed-regulating valve 18 is connected to a weight energy accumulator 24, the weight energy accumulator 24 is connected to the outlet end of the one-way fixed displacement pump 25 through the one-way valve, the inlet end of the one-way fixed displacement pump 25 is connected to a second oil tank 26, the inlet end and the outlet end of the bidirectional fixed displacement pump 12 are also connected in parallel to sequence valves, a first sequence valve 27 and a second sequence valve 28 may be provided, the control end of the first sequence valve 27 is connected to the outlet end of the left top hydraulic cylinder 4 through a hydraulic oil pipe 16, the inlet end of the left top hydraulic cylinder 4 is communicated with a third oil tank 29, the control end of a second sequence valve 28 is communicated with the outlet end of the right top hydraulic cylinder 5 through a one-way valve by a hydraulic oil pipe 16, the inlet end of the right top hydraulic cylinder 5 is communicated with a fourth oil tank 30, the control end of a first sequence valve 27 is also communicated with the inlet end of a first unloading valve 31 by the hydraulic oil pipe 16, the outlet end of the first unloading valve 31 is communicated with a fifth oil tank 32, the control end of the second sequence valve 28 is also communicated with the inlet end of a second unloading valve 33 by the hydraulic oil pipe 16, the outlet end of the second unloading valve 33 is communicated with a sixth oil tank 34, the control end of the first unloading valve 31 is communicated with the outlet end of the left bottom hydraulic cylinder 6, the inlet end of the left bottom hydraulic cylinder 6 is communicated with a seventh oil tank 35 by the one-way valve, the control end of the second unloading valve 33 is communicated with the outlet end of the right bottom hydraulic cylinder 7, the inlet end of the right bottom hydraulic cylinder 7 is communicated with an eighth oil tank 36 by the one-way valve, the outlet ends of the two bottom hydraulic cylinders are also communicated to the brake 10 through hydraulic oil pipes 16 through one-way valves, the brake 10 is communicated with the inlet end of an electromagnetic unloading valve 37, and the outlet end of the electromagnetic unloading valve 37 is communicated with a ninth oil tank 38; the hydraulic system further comprises a K-type three-position four-way reversing valve 39, one side of the K-type three-position four-way reversing valve 39 is communicated with an inlet and an outlet of the bidirectional quantitative hydraulic motor 13, a T port of the three-position four-way reversing valve 39 is communicated with an inlet end of the bidirectional quantitative hydraulic motor 13, a P port of the three-position four-way reversing valve is communicated with an outlet end of the bidirectional quantitative hydraulic motor 13, a closed end at the other side of the three-position four-way reversing valve 39, namely a B port, is communicated with the energy release one-way valve 41 and the heavy hammer energy accumulator 24 through an energy release speed regulating valve 40, an open end at the other side of the three-position four-way reversing valve 39, namely an A port, is communicated with a tenth oil tank 42, one control end of the three-position four-way reversing valve 39 is communicated with an outlet end of the left top hydraulic cylinder 4 and an inlet end of the first unloading valve 31, and the other control end of the three-position four-way reversing valve 39 is communicated with an outlet end of the right top hydraulic cylinder 5 and an inlet end of the second unloading valve 33.

When the elevator works, the counterweight in the traditional elevator is changed into the right car 3 with equal weight by adopting an arrangement mode of one-over-one, so that the newly added right car 3 is used as the counterweight of the opposite side left car 2 and can also bear the task of transporting passengers, and before the elevator is used for the first time, the motor is used for driving the one-way constant delivery pump 25 to pre-supplement potential energy for the heavy hammer accumulator 24.

First, the left car 2 is on the upper side (i.e., the passenger who is riding the left car 2 descends, the passenger who is riding the right car 3 ascends), and the weight of the left car 2 is greater than that of the right car 3: the electromagnetic unloading valve 37 works under the control of passengers or timing control to release hydraulic oil in the brake 10, the brake 10 releases the transmission shaft 11, at the moment, the pulling force generated by the left car 2 is greater than the pulling force generated by the right car 3, the pulling force difference pulls the right car 3 on the lower side, when the left car 2 reaches the lower side, the left car 2 triggers the left bottom hydraulic cylinder 6 on the lower side, the hydraulic oil in the left bottom hydraulic cylinder 6 reaches the brake 10 through the hydraulic oil pipe 16 from the seventh oil tank 35, the brake 10 tightly holds the transmission shaft 11, the left car 2 and the right car 3 stop moving, in the process, the gravitational potential energy part of the left car 2 is converted into the gravitational potential energy of the right car 3, meanwhile, the traction sheave 8 rotates through the traction sheave 8, the speed reducer 15 rotates through the transmission shaft 11, the speed reducer 15 drives the bidirectional constant delivery pump 12 to rotate, and the hydraulic oil passes through the first oil tank 17 and the first energy storage one-way valve 19, The bidirectional constant delivery pump 12, the second energy storage one-way valve 20, the energy storage speed regulating valve 18 and the fifth energy storage one-way valve 23 enter the heavy hammer energy accumulator 24, and redundant gravitational potential energy is recovered and stored by the heavy hammer energy accumulator 24. In the whole process, the oil inlet and the oil outlet of the bidirectional quantitative hydraulic motor 13 are communicated all the time without pressure difference, so that the bidirectional quantitative hydraulic motor 13 is in a zero-load state in the whole process.

The left car 2 is on the upper side (i.e., the passenger who takes the left car 2 descends, the passenger who takes the right car 3 ascends), and the gravity of the left car 2 is smaller than that of the right car 3: the electromagnetic unloading valve 37 works, the brake 10 releases the transmission shaft 11, at this time, the right car 3 descends to enable the left car 2 to trigger the left top hydraulic cylinder 4, hydraulic oil pushes the left end of the three-position four-way reversing valve 39 to move rightwards to be switched into a working position, meanwhile, hydraulic oil pushes the first sequence valve 27 to be switched into the working position, at this time, an oil inlet of the bidirectional fixed displacement pump 12 is communicated with an oil outlet, no pressure difference exists between the oil inlet and the oil outlet, so that the bidirectional fixed displacement pump 12 is in a zero-load state, at this time, gravitational potential energy stored by the heavy hammer energy accumulator 24 is released, the hydraulic oil sequentially passes through the energy release one-way valve 41, the energy release speed regulating valve 40, the three-position four-way reversing valve 39 and the bidirectional fixed displacement hydraulic motor 13, the bidirectional fixed displacement hydraulic motor 13 rotates to sequentially drive the coupler 14, the speed reducer 15, the coupler 14 and the traction sheave 8, the traction sheave 8 pulls the traction rope 9 to pull the right car 3, when the left car 2 reaches the lower side, the left car 2 triggers the left bottom hydraulic cylinder 6, hydraulic oil in the seventh oil tank 35 reaches the first unloading valve 31 through the hydraulic oil pipe 16 to be conducted, pressure in the guide paths of the first sequence valve 27 and the three-position four-way reversing valve 39 is released and recovered to the initial position, the heavy hammer energy accumulator 24 stops supplying energy, the other hydraulic oil reaches the brake 10 through the hydraulic oil pipe 16, the brake 10 holds the transmission shaft 11 tightly, and the left car 2 and the right car 3 stop moving.

The principle of the right car 3 on the upper side (namely, passengers riding the left car 2 go upwards and passengers riding the right car 3 go downwards) is the same as that of the left car 2 on the upper side, and the motion process is similar. For example, the gravity of the right car 3 is greater than that of the left car 2, at this time, the right car 3 stores energy into the weight energy accumulator 24 when moving downward, hydraulic oil enters the weight energy accumulator 24 through the first oil tank 17, the third energy storage check valve 21, the bidirectional constant delivery pump 12, the fourth energy storage check valve 22, the energy storage speed regulating valve 18 and the fifth energy storage check valve 23, redundant gravitational potential energy is recovered and stored by the weight energy accumulator 24, when the right car 3 reaches the lower side, the lower right bottom hydraulic cylinder 7 is triggered, hydraulic oil in the right bottom hydraulic cylinder 7 reaches the brake 10 through the hydraulic oil pipe 16 from the eighth oil tank 36, the brake 10 holds the transmission shaft 11 tightly, and the left car 2 and the right car 3 stop moving; for example, the gravity of the right car 3 is smaller than that of the left car 2, the left car 2 descends to enable the right car 3 to trigger the right top hydraulic cylinder 5, hydraulic oil pushes the right end of the three-position four-way reversing valve 39 to move leftwards to be switched into a working position, meanwhile, hydraulic oil pushes the second sequence valve 28 to be switched into the working position to communicate the oil inlet and the oil outlet of the two-way fixed displacement pump 12 to enable the oil inlet and the oil outlet to be in zero load, the gravitational potential energy stored by the heavy hammer accumulator 24 is released, the hydraulic oil sequentially passes through the energy release one-way valve 41, the energy release speed regulating valve 40, the three-position four-way reversing valve 39 and the two-way fixed displacement hydraulic motor 13, the two-way fixed displacement hydraulic motor 13 rotates reversely to pull up the left car 2, when the right car 3 reaches the lower side, the right car 3 triggers the right bottom hydraulic cylinder 7, the hydraulic oil in the eighth oil tank 36 reaches the second unloading valve 33 to enable the hydraulic oil to be in conduction, and the pressure in the guide paths of the second sequence valve 28 and the three-position four-way reversing valve 39 is released to be restored to the initial position, the weight accumulator 24 stops supplying power, the other path of hydraulic oil reaches the brake 10 through the hydraulic oil pipe 16, the brake 10 holds the transmission shaft 11 tightly, and the left car 2 and the right car 3 stop moving.

In the above case, whether the left cage 2 is on the upper side or the right cage 3 is on the upper side, when the weight of the left cage 2 and the weight of the right cage 3 are equal, the passenger can be reduced by issuing an over-weight prompt to either cage, so that the two cages generate a difference in gravity, and then the cage operates in different conditions in the above example.

The elevator has the advantages that the more the number of people is born, the more obvious energy consumption is saved. In the traditional electric drive elevator, 18375 joules (eighty percent of total transmission efficiency) is consumed for lifting 5 persons (with the mass of 300 kilograms) by 5 meters, and the energy consumed by taking 6 persons is ignored when the elevator goes downwards. After the method is adopted, 6 persons (with the mass of 360 kilograms) are taken by the car on the upper side of the elevator to descend, 5 persons are taken by the car on the lower side of the elevator to ascend, the same carrying task is completed by the elevator under the gravity difference, the gravitational potential energy stored by the heavy hammer energy accumulator 24 is about 1746 joules (the height difference is 5 meters, and the total transmission efficiency is sixty percent), and the energy is not consumed, but is generated by 1764 joules.

Through the mode, the energy recovery type elevator for the overpass has the function of recovering energy, when people on one side take the elevator to go down and people on the other side take the elevator to go up, due to the gravity difference, the people going down can pull up the people going up; meanwhile, energy generated by the difference of the gravitational potential energy of the up-going and down-going people can be recovered and stored, and when the gravity of the down-going people cannot provide enough tension for the up-going people, the stored energy is released to compensate the tension difference so as to meet the operation requirement of the elevator, so that the utilization of the gravitational potential energy and the lowest consumption of electric energy are realized. Compared with the traditional elevator device, the elevator device has the following advantages:

1) the energy-saving effect is obvious, and compared with the traditional elevator, the comprehensive energy-saving effect is fifty percent, and the energy-saving effect is particularly obvious.

2) The device has the advantages of simple structure, mature manufacturing process of related parts, small manufacturing difficulty, convenience in installation and use and low maintenance cost.

3) The hydraulic driving mode is adopted, the gravitational potential energy of the elevator is directly stored into hydraulic potential energy without secondary conversion, and the energy utilization efficiency is high.

4) The hydraulic system is ingenious in design, and constant and stable operation under different gravity differences is realized through a negative feedback adjusting mode of the hydraulic system under the condition of not consuming energy.