Online dynamic balance regulating mechanism of geotechnical centrifuge

Abstract

The invention discloses an online dynamic balance regulating mechanism of a geotechnical centrifuge. The online dynamic balance regulating mechanism comprises an imbalance force monitoring device, a dynamic balance regulating device and a dynamic balance counterweight block, wherein the dynamic balance regulating device comprises a balance controller, a motor, a screw lifting machine and a flange, the signal end of the balance controller is respectively connected between the control signal input ends of the imbalance force monitoring device and the motor, a rotating shaft of the motor and an input shaft of the screw lifting machine are connected through a shaft coupling, the flange is mounted on a screw rod of the screw lifting machine through a center hole of the flange, the flange is in threaded connection with the screw rod, and the outer side of the flange is connected with the dynamic balance counterweight block. The online dynamic balance regulating mechanism disclosed by the invention adopts the motor as a power source so as to facilitate the continuous providing of energy by utilizing a mature electric slip ring technology; and the screw lifting machine is adopted as an execution element, so that the online dynamic balance regulating mechanism can meet not only the dynamic regulation function under a centrifugal field, but also the power outage self-locking function under a balanced state, and has the advantages of realizing high regulation precision, being stable and reliable to work and saving electrical energy.

Description

technical field [0001] The invention relates to an online dynamic balance adjustment mechanism, in particular to an online dynamic balance adjustment mechanism for a geotechnical centrifuge. Background technique [0002] Geotechnical centrifugal model test technology is a powerful tool for studying many difficult geotechnical problems. It can be used for direct physical approximation or verification and calibration of computer programs for subsequent analysis of prototype systems. Geotechnical modeling is essential for developing and understanding the basic mechanical behavior of large-scale geotechnical systems. is very useful. Centrifugal model tests can also be used as an effective supplementary tool for conventional design and analysis techniques, and are increasingly used in scientific research and engineering practice. In recent years, China's geotechnical centrifugal model test science and technology have made great progress, and the demand for large-scale geotechnic...

AI Technical Summary

Problems solved by technology

Among the above two online dynamic balance adjustment mechanisms, the hydraulic adjustment balance mechanism has the disadvantages of relatively low adjustment accuracy and unstable reliability; the air pressure adjustment mechanism has the following disadvantages: complex structure, limited adjustment amount and large additional external load, Reliability is not stable

In addition, the above two adjustment structures must transmit fluid (high-pressure gas or high-pressure hydraulic oil) from the ground to the rotating arm through the rotary joint. However, the geotechnical centrifugal model test often requires continuous operation for 12 hours or 24 hours, or even continuous operation. The time is longer, and it is very difficult for the rotary joint to meet the long-term work and maintain a good dynamic and static high-pressure seal

The service life of the rotary joint does not match the actual requirements of the geotechnical test, and the stable performance of the system is difficult to meet the operation requirements of the main engine

[0005] Other online dynamic balance adjustment mechanisms for geotechnical centrifuges have not been reported in China, including patent documents and other non-patent documents

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