Uniaxial-creep testing machine

Abstract

The invention discloses a uniaxial-creep testing machine, which comprises a rack, a loading mechanism and a test piece mounting assembly, wherein the rack comprises a first vertical beam, a second vertical beam, a first cross beam and a second cross beam; the loading mechanism comprises a lever arm, a loading counter weight, a counter weight hook, a force transferring arm, a first oil cylinder and a second oil cylinder; the first oil cylinder consists of two cylinder blocks and a pipe body, wherein the two cylinder blocks have the same diameters, the center lines of the cylinder blocks are mutually parallel, and the pipe body is used for communicating the two cylinder blocks; the first oil cylinder is fixed on the first cross beam; one cylinder block for forming the first oil cylinder is internally provided with a first piston; the other cylinder block for forming the first oil cylinder is connected and communicated with the second oil cylinder; the internal diameter of the second oil cylinder is more than the internal diameter of the first oil cylinder; the inside of the second oil cylinder is internally provided with a second piston; one end of the lever arm is hinged with a first hinge pin on the top of the first vertical beam; the counter weight hook is hinged with a third hinge pin installed on the end part of the lever arm; the loading counter weight is arranged on the counter hook; one end of the force transferring arm is connected with the first piston; and the other end of the force transferring arm is hinged with a second hinge pin installed on the lever arm.

Description

technical field [0001] The invention belongs to testing equipment, in particular to a uniaxial creep testing machine used for testing the creep performance of specimens. Background technique [0002] Creep performance is an important mechanical property of components. For rocks, creep performance is an important factor determining the long-term stability of engineering surrounding rock. The parameters for evaluating the long-term stability of engineering rock mass are obtained through creep tests under long-term loading. Due to the high strength of the rock, it is necessary to apply a large tonnage axial load to the rock to cause the rock to undergo creep deformation under this load. The key to rock creep tests is to ensure that large-tonnage axial loads are applied during long-term loading and keep them stable and unchanged. [0003] The existing uniaxial creep testing machine includes a frame, a loading mechanism and a specimen mounting assembly. There are two types of l...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved uniaxial creep testing machine to solve the problems of stability and continuity of the applied load during the long-term loading of the test piece, and to facilitate testing according to the needs of the test. Adjust the applied axial load to achieve different axial loads from small tonnage to large tonnage

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