Apparatus for large-torque torsional fatigue tests of shaft parts

Abstract

The invention provides an apparatus for large-torque torsional fatigue tests of shaft parts, belonging to the technical field of material testing. The apparatus comprises two hydraulic oil cylinders, two crossbeam pedestals, a crossbeam, a testing shaft, a connecting flange, a fixed pedestal, a torsional angle displacement sensor, an oil pressure sensor and a hydraulic pressure control system. The two crossbeam pedestals and the fixed pedestal are fixed via foundation bolts, and then pressure oil is controlled to separately and alternately enter the two hydraulic oil cylinders, so alternate fatigue load can be applied to a to-be-tested shaft; and pressure oil is controlled to enter one of the two hydraulic oil cylinders while the other hydraulic oil cylinder is unloaded, and oil supply pressure is continuously increased, so the limit torsional load of the to-be-tested shaft can be tested. The apparatus provided by the invention can realize testing of the alternate fatigue load and limit torsional load of shaft parts, and is simple in structure, great in loading capability, high in work efficiency and easy to operate.

Description

technical field [0001] The invention relates to the technical field of material testing, in particular to a high-torque torsional fatigue testing device for shaft parts. Background technique [0002] Shaft parts are widely used in automobiles, aerospace, petroleum and other industries. They usually have poor working conditions and are often subject to changing torque loads. The fatigue strength of shaft parts is a very important performance. For the torsional fatigue strength test of shaft parts, at present, the torsional fatigue test is mainly carried out on the transmission shaft of the car. The torque provided by the test device is very limited, and it is impossible to twist the shaft parts with a maximum torque (greater than 100,000 Nm). Fatigue strength test. [0003] For example, the transmission shaft test device described in the patent CN201210537897.2 (a method for fatigue testing of automobile transmission shafts), according to its structure and driving mode, if ...

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Problems solved by technology

For the torsional fatigue strength test of shaft parts, at present, the torsional fatigue test is mainly carried out on the transmission shaft of the car. The torque provided by the test device is very limited, and it is impossible to twist the shaft parts with a maximum torque (greater than 100,000 Nm). Fatigue strength test

[0003] For example, the transmission shaft test device described in the patent CN201210537897.2 (a method for fatigue testing of automobile transmission shafts), according to its structure and driving mode, if it wants to achieve a load torque of 100,000 Nm, it needs to be equipped with a large motor with a huge shape. Large power consumption, no energy saving, and the test device has a complex structure and high cost

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