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Energy-saving hydraulic device and hydraulic hoisting equipment with same

A hydraulic device and a technology with a rod cavity, which is applied in the field of hydraulic lifting equipment and energy-saving hydraulic devices, can solve the problems of energy storage and energy-saving efficiency, and achieve the effects of improving energy conversion efficiency, improving energy-saving efficiency, and reducing intermediate links

Active Publication Date: 2013-04-03
SANY MARINE HEAVY IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned energy-saving system can convert the gravitational potential energy of the falling weight into pressure energy and release it to increase the torque when the weight is lifted, since an oil pump is arranged between the gravitational potential energy of the weight and the energy storage device, the energy conversion There is a conversion link of mechanical energy in the process, which affects the efficiency of energy storage and energy saving

Method used

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  • Energy-saving hydraulic device and hydraulic hoisting equipment with same
  • Energy-saving hydraulic device and hydraulic hoisting equipment with same

Examples

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Effect test

no. 1 example

[0029] see figure 1 , shows the hydraulic principle diagram of the energy-saving hydraulic device according to the first embodiment of the present invention. As can be seen from the figure, the energy-saving hydraulic device includes lifting cylinders 1, 2, a first electromagnetic reversing valve V1, a second electromagnetic reversing valve V2, and an energy storage cylinder composed of an energy storage cylinder 4 and a counterweight 5. device. The counterweight 5 is connected to the upper end of the piston rod of the energy storage cylinder 4 .

[0030] figure 1 Two lift cylinders are drawn in , the rodless chambers of lift cylinder 1 and lift cylinder 2 are connected through pipelines, and the rod chambers are connected through pipelines. In actual implementation, the number of lifting cylinders in the energy-saving hydraulic device may be one, or any number of multiples. In the case of multiple lifting cylinders, the rodless chambers of the lifting cylinders communicat...

no. 2 example

[0041] see figure 2 , the difference between this embodiment and the first embodiment is that the energy-saving hydraulic device further includes: a third electromagnetic reversing valve V3, connected to the rodless cavity and the rodless cylinder of the auxiliary cylinder 3 through the first node N1 and the second node N2 Between the rod chambers; and the fourth electromagnetic reversing valve V3, connected to the rod chamber of the auxiliary cylinder 3 and the third electromagnetic reversing valve through the second node N1, connected to the lift cylinder 1 through the third node N3, 2 on the pipeline between the rod cavity and the oil tank.

[0042] Wherein, the third electromagnetic reversing valve V3 has the following positions: the position (left position) when the fifth electromagnet Y5 is not energized, so that the non-rod cavity and the rod cavity of the auxiliary cylinder 3 are not connected; the fifth electromagnet Y5 is energized When the position (right position...

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Abstract

The invention provides an energy-saving hydraulic device and hydraulic hoisting equipment with the same. The energy-saving hydraulic device comprises an accumulator, and is characterized by also comprising lift cylinders (1,2) for providing a hoisting force, a first electromagnetic shuttle valve (V1), a second electromagnetic shuttle valve (V2) and an auxiliary cylinder (3), wherein rodless cavities and rod cavities of the lift cylinders (1,2) are connected with a pressure oil source and an oil tank through the first electromagnetic shuttle valve (V1); the rodless cavities of the lift cylinders (1,2) are connected with the accumulator through the second electromagnetic shuttle valve (V2); and the rodless cavity of the auxiliary cylinder (3) is connected with the accumulator through the second electromagnetic shuttle valve (V2). The energy-saving hydraulic device and the hydraulic hoisting equipment with the same can reduce the intermediate link between the accumulator and the work cylinder, so the energy-saving efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of hydraulic lifting, in particular to an energy-saving hydraulic device and hydraulic lifting equipment with the same. Background technique [0002] Construction hoisting machinery such as stackers need to frequently lift and put down containers (heavy objects) during operation. If the potential energy of the container can be used when the container is lowered, it will greatly reduce the working load of construction hoisting machinery such as stackers. energy consumption. [0003] At present, some inventions and creations have been made in the use of potential energy in elevators and port cranes. For example, Chinese Invention Patent Application No. 200910053030 (publication number 101580207) discloses a hydraulic energy-saving system for port cranes. The previous potential energy is converted into the pressure energy of the fluid with the help of several variable plunger oil pumps installed in parallel i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/00B66C13/12
Inventor 廖荣华钟荣华罗仲辉
Owner SANY MARINE HEAVY IND