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Lifting device gravity potential energy pressure volume storage system

A technology of gravitational potential energy and lifting devices, which is applied to fluid pressure actuation system components, lifting devices, fluid pressure actuation devices, etc., can solve problems such as waste, and achieve the effect of less energy conversion links and high conversion efficiency

Active Publication Date: 2019-04-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the waste of the gravitational potential energy of the existing lifting mechanism and the shortcomings in the recovery and utilization of the existing hybrid electric power technology, the present invention provides a storage system for the gravity potential energy of the lifting device, which can recover and recycle the gravitational potential energy of the lifting mechanism. , the pressure and flow of the oil chamber of the lifting mechanism are independently and continuously controlled by the electric / generator and hydraulic motor / pump, and smooth running characteristics can be obtained without throttling control valves. Compared with the existing technology, it has higher energy conversion and utilization efficiency

Method used

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  • Lifting device gravity potential energy pressure volume storage system
  • Lifting device gravity potential energy pressure volume storage system
  • Lifting device gravity potential energy pressure volume storage system

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Effect test

Embodiment 1

[0026] Attached below figure 1 The specific embodiment 1 of the present invention will be further described.

[0027] as attached figure 1 As shown, an embodiment 1 of a lifting device gravity potential energy pressure volume storage system is implemented. In the specific implementation, the engine 1 adopts a diesel engine, the main control valve 2 is a three-position six-power ratio multi-way reversing valve, and the lifting hydraulic cylinder 3 adopts a single rod structure, the conversion control valve 4 is an electric control structure, and the pressure is continuously adjustable. The hydraulic motor / pump 5 adopts the principle of an axial plunger structure. The hydraulic accumulator 6 is a piston type, and the motor / generator 7 is a permanent magnet. Synchronous structure, the motor speed controller 8 adopts vector control mode, the supercapacitor 9 is composed of basic modules connected in series and parallel, the DC-DC converter 10 can bidirectionally step up and step ...

Embodiment 2

[0034] Attached below figure 2 The specific embodiment 2 of the present invention will be further described.

[0035] as attached figure 2 As shown, the connection structure and working mode of the components of the energy recovery control circuit and the conversion control valve 4 in this specific embodiment are the same as those in Embodiment 1, the difference being that the main drive circuit is a positive flow control circuit. The main hydraulic pump 13 is a variable-displacement pump controlled by electronic proportion, and its displacement is proportional to the set signal, that is, as the set signal increases, the displacement of the main hydraulic pump 13 also increases.

Embodiment 3

[0037] Attached below image 3 A further description will be made to the specific embodiment 3 of the present invention.

[0038] as attached image 3 As shown, this embodiment is to further improve the structure of embodiment 2 on the basis of specific embodiment 2. The structural improvement is that the main control valve 2 adopts an independent control structure for oil inlet and outlet, and consists of two three-position The three-way proportional directional valve is composed of a three-position four-way solenoid valve; the working oil port of the first proportional directional valve is connected with the rod chamber of the lifting hydraulic cylinder 3, and the working oil port of the second proportional directional valve It communicates with the rodless chamber of the lifting hydraulic cylinder 3, the oil outlet of the main hydraulic pump 13 communicates with the oil inlet of the first and second proportional directional valves, and the oil return ports of the first and...

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Abstract

The invention discloses a lifting device gravitational potential energy pressure-volume storage system. According to the system, an electro-hydraulic compound energy recovery system is additionally arranged based on a lifting mechanism hydraulic cylinder inlet and outlet oil port system and is further composed of a hydraulic motor / pump, a motor / electric generator, a super-capacitor module and an energy accumulator. An inlet / outlet oil port of the hydraulic motor / pump communicates with a lifting hydraulic cylinder through a control valve, and the other oil port of the hydraulic motor / motor communicates with the energy accumulator. An output shaft of the hydraulic motor / pump is connected with an output shaft of the motor / electric generator. The super-capacitor module is connected to a rotary speed controller DC bus of the motor / electric generator. According to the lifting device gravitational potential energy pressure-volume storage system, the gravitational potential energy in the dropping process of the lifting mechanism is stored into the energy accumulator and a super-capacitor without throttling losses through the hydraulic motor / pump and the motor / electric generator, the part of energy stored can be recycled without throttling losses, machine working efficiency is improved, operating cost is reduced and emission pollution of an engine is reduced.

Description

technical field [0001] The invention relates to a recovery and utilization system of gravity potential energy of a lifting device, in particular to a pressure volume storage control system for the gravity potential energy of the lifting mechanism of engineering machinery such as hydraulic excavators, loaders, reach stackers and forklifts. Background technique [0002] In the past ten years, my country's construction machinery industry has made great progress. The output of loaders, excavators, truck cranes, road rollers, forklifts, concrete machinery and other products has jumped to the first place in the world, becoming one of my country's important pillar industries. In the operation of these equipments, the high-frequency lifting and deceleration of the working mechanism, resulting in a very large waste of potential energy, so how to efficiently recycle and reuse this part of the wasted gravitational potential energy is a technical problem that must be solved in the field ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/08F15B1/02F15B21/14E02F9/22B66C13/20B66F9/22
CPCB66C13/20B66F9/22E02F9/2217F15B1/02F15B21/08F15B21/14F15B2211/20515F15B2211/632F15B2211/6651
Inventor 权龙葛磊杨敬赵斌王成宾
Owner TAIYUAN UNIV OF TECH
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