A hydraulic impact testing machine

Abstract

The invention provides a hydraulic impact testing machine formed by a loading host, a hydraulic system and a control system. A loading host frame is formed by a lower beam, an upper beam, and guide pillars. The guide pillars are provided with a middle beam capable of sliding. A loading hydraulic cylinder and a middle beam moving oil cylinder are fixed and installed on the upper beam. The middle beam and a vertical and horizontal luffing oil cylinder are in hinged joint. A piston rod of the loading hydraulic cylinder is a double-rod symmetry structure. The middle of the piston rod is provided with a through hole allowing an elongated test piece to pass through, and both ends are provided with screwed holes for installing test piece clamps or force transducers. A piston of the loading hydraulic cylinder is provided with a buffer structure which prevents the impact. The hydraulic system carries out an impact test under the control of the control system. The testing machine can carry out static state loading, rapid impact loading and the static-dynamic composite impact loading on the test piece, can employ a vertical usage mode, a horizontal usage, and an inclined usage mode, and fully satisfies the technology conditions of anti-impact support equipment research and development and test requirements of an impact mine.

Description

technical field [0001] The invention relates to the detection of impact resistance performance of coal mine support equipment, in particular to a large-tonnage high-energy level that can carry out static loading, impact loading and static-dynamic composite loading on the support equipment, and can be used in vertical, horizontal and inclined modes. Hydraulic shock testing machine. Background technique [0002] The occurrence time of rock burst in coal mine is short and the energy released is huge. The anti-scour support equipment of coal mine is subjected to sudden impact load while bearing the static load of surrounding rock, which may easily cause serious safety accidents and economic losses. For rock burst mines, simple high-rigidity support is no longer applicable, and it is urgent to develop rigid-flexible coupling integrated anti-scour support equipment to improve the support system. When researching, designing and using anti-shock support equipment, it is necessary t...

AI Technical Summary

Problems solved by technology

Among them, the metal pendulum testing machine is specially used to test the shear toughness of metal, and cannot perform tension and compression tests; the drop hammer impact testing machine achieves vertical impact by lifting heavy objects, and cannot perform static and dynamic composite loading; Rod impact testing machine can realize high-speed impact test, but it is limited to low-energy level impact test on small-sized specimens; high-speed electro-hydraulic servo impact testing machine can only be used for impact performance testing of materials, and cannot be used for impact testing of large-scale equipment

Moreover, the loading methods of these impact testing machines are limited to dynamic loading, and static and dynamic composite loading cannot be performed.

In addition, for composite impact tests on slender parts (from 2 meters to more than 10 meters in length), such as anti-scouring anchor rods and anti-scouring anchor cables, the test equipment is required to be used horizontally; The composite impact test of the equipment requires inclined use (to simulate the impact of the gravity component on the anti-shock support equipment); the composite impact test of the horizontal roadway support equipment requires vertical use, and these impact testing machines cannot simultaneously meet the requirements of vertical and horizontal and tilted use requirements

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