Arm-frame stroke-controlled oil-cylinder device and arm-frame vibration-controlling system

Abstract

The invention discloses an arm-frame stroke-controlled oil-cylinder device, which comprises a first cavity body, a piston, a piston rod and a magnetorheological damper, wherein the first cavity body is used for being filled with hydraulic oil, the piston is positioned in the first cavity body, the piston rod is connected with the piston, and the magnetorheological damper comprises a second cavity body and a coil, wherein the second cavity body is used for being filled with a magnetorheogical fluid, and the coil is positioned in the magnetorheogical fluid; and the coil is wound on the piston rod and is used for driving the piston rod to generate a damping force which is opposite to a relative acceleration between arm frames to control the relative acceleration between the arm frames according to an input control signal. The invention also discloses an arm-frame vibration-controlling system, and by adopting the arm-frame vibration-controlling system, the effective control for the relative acceleration between the arm frames can be realized, and the stability and the safety of engineering machinery with an arm-frame system are guaranteed in working.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a boom stroke control oil cylinder device and a boom vibration control system. Background technique [0002] The concrete pump truck jib is a typical flexible multi-body system with large span, low stiffness and low natural frequency. In the actual pumping process, the boom system, especially the high-section boom section, is prone to severe vibration. This severe vibration not only affects the normal construction of the pump truck, but also reduces the normal service life of the pump truck. The main reasons for the violent vibration of the boom are as follows: the posture of the boom is complex and changeable, and the natural frequency of the boom system with different postures is quite different. Stable working condition. When the ratio of the working frequency of the pumping working cylinder and the reversing cylinder to the natural frequency of the boom system is When...

AI Technical Summary

Problems solved by technology

When the ratio of the working frequency of the pumping working cylinder and the reversing cylinder to the natural frequency of the boom system is When it is within the range, the vibration amplitude of the boom system increases, and the boom and body of the pump truck vibrate greatly, which will make the concrete pouring process unstable, and the tail hose vibrates violently, causing the pouring position to deviate

[0003] At present, the vibration of the boom of the pump truck has become one of the difficult problems for construction machinery. The existing concrete pump truck does not carry out effective vibration control for the boom. During the concrete pumping process, the boom and its delivery pipe are often in severe Vibration, in severe cases, will cause damage to hydraulic components, sealing devices and breakage of structural connections

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