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Boom anti-tilt buffer device

A buffer device and anti-backward tilting technology, applied in transportation and packaging, cranes, shock absorbers, etc., can solve the problems of weak adaptability and uncontrollable buffer force, avoid breaking or tipping, have good adaptability, improve The effect of energy efficiency

Inactive Publication Date: 2011-12-14
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no matter what kind of buffer device, its buffer characteristics are fixed, making the buffer force uncontrollable and weakly adaptable to working conditions, so it is not suitable for providing optimized buffer force for large booms under different working conditions

Method used

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Embodiment Construction

[0026] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

[0027] At present, reversible phase change liquids are mainly magnetorheological fluids or electrorheological fluids. Taking magnetorheological fluids as an example, this reversible phase change liquid is formed by dispersing small soft magnetic particles in a carrier liquid with low magnetic permeability. The damping can change with the external magnetic field and has controllable rheological properties of the suspended liquid. Under the action of the magnetic field, the magnetorheological liquid can realize the reversible change from Newtonian fluid to semi-solid in milliseconds; after the magnetic field is removed, the magnetic flow The fluid can be restored to it...

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Abstract

A cantilever retroversion-proof cushioning apparatus comprises: an actuating cylinder (10), the actuating cylinder (10) comprising a main cylinder body (20); a piston (21) dividing a piston cavity into a rod cavity (22) and a rod free cavity (23), a damping passageway (24) in communication with the two cavities being disposed between the rod cavity (22) and the rod free cavity (23); a piston rod (25); a damping control system (40), connected to the cantilever and the actuating cylinder (10), and calculating a current optimal cushioning force of cantilever retroversion according to impact parameter information; and a field generator, for changing field intensity in the actuating cylinder (10). The cantilever retroversion-proof cushioning apparatus can calculate the optimal cushioning force of the cushioning apparatus before the lifting beam overturns, and when the overturn occurs, adjust the cushioning force in real time through fast response of liquid capable of reversible phase change, and the precise control can satisfy cantilever retroversion cushioning processing under different working conditions.

Description

technical field [0001] The invention relates to a variable damping device, in particular, to an anti-backward-tilting buffer device for a boom. Background technique [0002] Large-scale truss arms and box arms in construction machinery can be regarded as flexible bodies due to their large slenderness ratio and significant deformation under heavy load. During the loading process, the flexible body gradually deforms to store elastic potential energy; during sudden unloading, the boom vibrates violently under the drive of elastic potential energy. Release may even drive the boom to tip over as a whole. [0003] Under the impact of sudden unloading, the boom will rotate rigidly and accompanied by its own vibration. The movement form is complex. The rotation angle, angular velocity and angular acceleration of the boom change drastically with time. Different buffers can be designed for different motion parameters. buffer device. Existing buffer devices can be divided into two t...

Claims

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Application Information

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IPC IPC(8): B66C23/88F16F15/027F16F9/53
CPCB66C23/92F16F9/535B66C13/20
Inventor 李宇力刘洋张劲刘耀宗
Owner ZOOMLION HEAVY IND CO LTD
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