Method and device for vibration reduction of arm support

A boom and luffing oil cylinder technology, applied in the field of fire safety, can solve the problems of real-time adjustment of the inoperable state of the slope setting, deviation from the working position, collision with external obstacles, etc.

Pending Publication Date: 2020-07-07
SHANGHAI GRAMAN INT FIRE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shaking of the boom will aggravate the panic of the operator and the rescued, and affect their normal rescue work. Severe shaking will also make the whole vehicle unstable, resulting in a serious accident of overturning
[0004] At present, there are two common methods of boom vibration reduction. One method is to decelerate and stop the movement of the boom through the slope mode of the electrical control system. The defect of this method is that if the slope is set too long, the boom will stop. If the accuracy of the position is too poor, it will deviate from the required working position, and even cause the risk of collision with external obstacle

Method used

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  • Method and device for vibration reduction of arm support
  • Method and device for vibration reduction of arm support
  • Method and device for vibration reduction of arm support

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Embodiment

[0029] see figure 1 As shown: a device for boom vibration reduction provided in this embodiment, including a turntable 1, an oil pressure sensor 2, a luffing cylinder 3, an oil pressure sensor 4, a long angle sensor 5, a luffing jib 6, a control Device 7, weighing sensor 8, working platform 9, electro-hydraulic proportional overflow valve 10, two-phase balance valve 11, electro-hydraulic proportional reversing valve 12 and electro-hydraulic proportional overflow valve 13.

[0030] The turntable 1 described in this embodiment is a rotary platform, which is connected with the lower vehicle body through a slewing support. A controller 7 is installed on the turntable 1 to collect sensor signals (such as oil pressure sensor 2, oil pressure sensor 4, long angle sensor 5, weighing sensor 8) and perform analysis and calculation, and output control signals to execute according to the established program. mechanism, such as electro-hydraulic proportional relief valve 10, electro-hydrau...

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PUM

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Abstract

The invention discloses a method and a device for vibration reduction of an arm support. The method comprises the following steps that a pressure value P required by each cavity of an oil cylinder iscalculated in real time when the arm support is in static balance in a current position state and under a load; when the set conditions that a variable-amplitude oil cylinder electromagnetically controls a reversing valve to be in a closed state and the oil pressure of the variable-amplitude oil cylinder is greater than P1 are simultaneously met, an electro-hydraulic proportional pressure overflowvalve is opened, the opening pressure of the overflow valve is synchronously set as P1; when the oil pressure of the variable-amplitude oil cylinder is stable and smaller than or equal to P1, the electro-hydraulic proportional pressure overflow valve is closed, the overflow valve is used as a stop valve, the vibration reduction process is finished; and the device at least comprises a lifting armsupport and the variable-amplitude oil cylinder, the variable-amplitude oil cylinder is a hydraulic oil cylinder, one end of the variable-amplitude oil cylinder is connected with the arm support, a balance valve is arranged on the variable-amplitude oil cylinder, and overflow valves are arranged on a rod cavity and a rodless cavity of the variable-amplitude oil cylinder correspondingly. The methodand the device for vibration reduction of the arm support are suitable for vibration reduction when the arm support stops suddenly in various working states.

Description

technical field [0001] The invention relates to a method and device for vibration reduction of a boom, and belongs to the technical field of fire safety. Background technique [0002] With more and more frequent fire rescue work, firefighters have higher and higher requirements for the safety and comfort of rescue equipment. As the main equipment for high-altitude fire fighting and rescue, elevating fire trucks, the movement speed, movement stability, stop accuracy and stop stability of the boom are the main indicators to measure its movement performance. The speed of action can be solved by increasing the flow rate of the hydraulic system, and the stability of the movement can be solved by the hydraulic balance valve, which is already a mature technology. The stopping accuracy and stopping stability of the boom, that is, the vibration damping performance of the boom, is a problem that most manufacturers need to solve urgently. [0003] As we all know, the jib is a cantile...

Claims

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Application Information

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IPC IPC(8): B66F11/00F15B11/08B66C23/82
CPCB66C23/821B66F11/00F15B11/08
Inventor 王茂伟张铂王超梁申申王红兵刘震程明
Owner SHANGHAI GRAMAN INT FIRE EQUIP
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