Pressure stabilizing device for hydraulic loading

Abstract

The invention discloses a pressure stabilizing device for hydraulic loading, which comprises a high-pressure oil pipe, a pressure reducing oil cylinder and a weighing oil cylinder, wherein a high-pressure cavity of the pressure reducing oil cylinder is connected with the high-pressure oil pipe; a low-pressure cavity of the pressure reducing oil cylinder is communicated with the weighing oil cylinder through a low-pressure oil pipe; and a piston rod of the weighing oil cylinder is arranged upwards and connected with a weight tray. The high-pressure oil pipe is connected with a common hydraulic loading system (oil pump-jack loading system), and a proper weight of weights are put in the weight tray; when the pressure of a working oil line is changed, the pressure reducing oil cylinder of a small stroke is driven to move, and at the same time, the weighing oil cylinder connected in series makes a large-stroke movement. Because the pressure value of the weighing oil cylinder is only relative to the weight of the weights, and the change of the pressure reducing oil cylinder is uniquely determined, the pressure of the working oil line can be guaranteed to be stable. The pressure stabilizing device is only a hydraulic mechanical device and has the advantages of reliable work, good pressure stabilizing performance, convenient mounting and use, wide range of application pressure, and the like.

Description

technical field [0001] The invention relates to a hydraulic loading system, in particular to a pressure-stabilizing device for hydraulic loading, which can keep the pressure of the loading oil circuit stable during the working process. Background technique [0002] When carrying out structural tests or engineering inspections, the loaded jack load must remain unchanged, and the pressure of the working oil circuit must be stable or small. Only in this way can the requirements of scientific research accuracy and testing specifications be met, and the test results and testing data can be real and effective. When performing low-cycle repeated tests on the seismic performance of civil structures, the common specimens are walls, frames, columns, and cross joints. During the test, the vertical force was simulated by the hydraulic jack plus the vertical load, and the earthquake action was simulated by the electro-hydraulic servo actuator plus the horizontal load. Under the actual ...

AI Technical Summary

Problems solved by technology

It is difficult to use a few accumulators to solve the pressure stabilization problem of the oil circuit system during various structural tests

In addition, accumulators are expensive, and there are no ultra-high pressure products for domestic accumulators

In the domestic structural laboratory, some custom-made accumulators are used as the vertical force stabilizing device, and the gas in the air bag is nitrogen. After daily test practice, it is found that the effect is not very good. It plays the role of "shaving peaks and filling valleys", but from its working principle, it is impossible to achieve absolute voltage stabilization, and there are certain requirements for the range of working pressure values

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