Geotechnical centrifuge dynamic balance adjusting system

Abstract

The invention discloses a geotechnical centrifuge dynamic balance adjusting system which comprises a high level cistern installed on a geotechnical centrifuge rotary arm bearing and used for storing water, an even number of end water tanks installed on rotary arms on the two sides of the geotechnical centrifuge rotary arm bearing, and multiple pipelines installed on a geotechnical centrifuge and used for enabling the high level cistern to communicate with the end water tanks. Since water is injected into the end water tanks for balancing, the centrifugal field of the end water tank at the farend is large, the needed balancing water amount is small, and therefore when the installation space is limited, the balancing ability can be greatly improved. The balancing ability is improved along with improving of the g value of the centrifugal field; the dynamic balance adjusting system effectively utilizes centrifugal force and the self weight effect of water for water injection, no driving device needs to be added, and system composition is greatly simplified; the dynamic balance adjusting system is provided with no element such as motors with working performance stability affected by the centrifugal field within the high centrifugal field area, system reliability is higher, limitation of the centrifugal field is small, and the using range is wider.

Description

technical field [0001] The invention belongs to the technical field of dynamic balance of a geotechnical centrifuge, and in particular relates to a dynamic balance adjustment system of a geotechnical centrifuge. Background technique [0002] Geocentrifuge test models are generally very heavy and located away from the center of the shaft. Under high centrifugal field, the influence caused by a little unbalanced mass will be magnified by N times. However, the shape of the geotechnical model is complex and the texture is soft and uneven, so the change of the center of mass is inevitable during the test. Especially when doing dam break tests, the center of mass change caused by the large-scale collapse of the model will be very large. [0003] The dynamic unbalanced load is the main factor affecting the vibration of the centrifuge. If it is light, it will reduce the running stability of the centrifuge, accelerate the wear of moving parts, and shorten the service life of the ma...

AI Technical Summary

Problems solved by technology

[0008] The disadvantages of the above-mentioned first type of balance adjustment mechanism are: the size of the counterweight is large, the installation space is limited; the trimming capacity is limited; the system composition is complicated; the system reliability is poor, and it is not suitable for use in high centrifugal fields

[0009] The reasons for the above disadvantages are: the internal space of the centrifuge arm is limited, the moving distance of the counterweight and the size of the counterweight are relatively limited, resulting in limited trimming capabilities; the motor drive requires a high-power motor, a screw, and a synchronized The hydraulic drive requires motors, accumulators and corresponding supporting components, etc. The composition of the two driving methods is relatively complicated; under high centrifugal field, the reliability of the motor and the stiffness of the screw rod cannot be well guaranteed. , the sealing performance of pipelines and pipe joints of the hydraulic drive mechanism is difficult to be guaranteed

[0010] The disadvantages of the above-mentioned second type of balance adjustment mechanism are: the trimming ability is limited, the system structure is complicated, and it is not suitable for high centrifugal field

[0011] The reasons for the above shortcomings are: the moving mass and distance of the water inside the water tank are limited, resulting in insufficient system trimming ability; The airtightness of pipelines and valves is not easy to guarantee, and the control components are under high centrifugal field, so the reliability of the system is not high

[0012] The disadvantages of the above-mentioned third type of balance adjustment mechanism are: the space of the water tank is limited, the dynamic trim capability is low, and only one-way trim can be performed

[0013] The reason for the above disadvantages is: the water tank is placed in the counterweight basket to replace the counterweight. It first needs to ensure the static trimming capability, and secondly, it can perform dynamic trimming.

However, the size of the water tank is limited, and the water density is low. When it is used for static trimming, it already occupies a lot of space in the water tank, which greatly reduces the dynamic trimming capability of the system.

In addition, since the water tank is only equipped on the counterweight end, it can only be trimmed in one direction

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