Cushioning and vibration damping device for support of intelligent well

Abstract

The invention discloses a cushioning and vibration damping device for a support of an intelligent well. A magneto-rheological damper comprises a cylinder tube, wherein the top of the cylinder tube is connected into a whole with a column cap, a floating piston is arranged inside the cylinder tube, a spring is fixed between the floating piston and the column cap, a piston is arranged in the space of the lower part of the floating piston inside the cylinder tube, and filled with magneto-rheological fluid, a channel is formed inside the piston, a coil is wound on the outer side of the piston, a piston rod is connected below the piston, penetrates the bottom of the cylinder tube and is fixed on a column body, a disc spring set is installed on the outer surface of the cylinder tube through an inner hole of the disc spring set, the upper end of the disc spring set is connected with the column cap, the lower end of the disc spring set is connected with the column body, a pressure sensor is installed on a support of the column cap and the disc spring set and also connected with a controller, and the controller is used for controlling the carrying current of the coil. The cushioning and vibration damping effects of the support of the well to rock pressure impact are optimized through realizing the real-time control.

Description

Technical field [0001] The invention relates to the technical field of mine equipment and smart materials, and in particular to a support buffer vibration damping device for smart wells. Background technique [0002] In the process of mining operations, rock shock is an unavoidable mining problem, which is often easy to cause equipment damage and even casualties. The main function of mining supports is to provide a safe operating environment for each process of underground mining, which will directly involve The safety, efficiency, consumption, environmental protection, and mining costs of mining operations are of great significance to coal mining. Nowadays, well-used supports mainly include hydraulic supports, leg-lift hydraulic supports, single hydraulic supports, friction metal supports, wooden supports, etc. However, the existing support types generally have no cushioning or poor vibration damping function. There is an urgent need for a device capable of damping the mine...

AI Technical Summary

Problems solved by technology

When the roof comes to press, the hydraulic supports on the working face do not share the pressure, but the hydraulic supports with a relatively large initial support force first play a role. In this way, if the hydraulic support with a relatively large initial support force does not buffer and give way in time, it will Under a huge impact load, the stress condition deteriorates sharply, and it is easy to imagine cylinder explosion damage

In addition, due to the difference in the initial support force of each support, it is very easy to cause the bending deformation of the roof to increase during the sinking process of the roof, which will lead to premature separation of the roof and breakage, resulting in ribs and end surges, making the bracket- Unbalanced rock theory

At the same time, during the bending and deformation process of the roof, the bracket only serves as a support point, thus prolonging the breaking length of the rock beam on the old roof, increasing the step distance and the collapse height of the old roof on the working face, and finally leading to a strong Periodic pressure over a large area may even lead to serious accidents such as crushing to death and crushing brackets

Images