A device that can isolate the interaction between tension, pressure and torque

Abstract

The invention discloses a device capable of isolating the mutual influence of tension pressure and torque, which solves the problem that the difficulty in applying compound loads mainly lies in the mutual influence of tension pressure and torque when the tension pressure and torque are applied simultaneously. It includes bearing housing, large and small end caps, gland, chassis, deep groove ball bearing, thrust bearing, and rotating shaft. The rotating shaft is provided with a thrust shoulder in the middle of the shaft. group, symmetrically arranged in the bearing housing along the thrust shoulder of the rotating shaft. The thrust bearings arranged symmetrically along the thrust shoulders in the device carry the tension and compression loads, so that the torque can be applied to the specimen only by overcoming the starting friction of the thrust bearings, so that the thrust bearings bear all the tension and compression loads. Compressive load, and participate in the transmission of torque, so the application process of tension pressure and torque will not affect each other, so as to achieve the real simultaneous loading of tension / compression moment, bending moment and torque without interfering with each other.

Description

technical field [0001] The invention relates to an experimental device for isolating the mutual influence of tensile pressure and torque applied to a mechanical test bench when composite loads are applied. Background technique [0002] In mechanical design work, it is often necessary to check the strength of certain structures or parts with severe loads. The strength check can be roughly divided into two parts, namely theoretical check and experimental check. In test verification, it is often necessary to study the mechanical properties of the sample under loads such as tension, compression, bending, and torsion. However, the existing mechanical testing machines cannot accurately complete the synchronous application of tension (compression) force and torque. This is mainly due to the fact that part of the tension and compression effect is generated during the torque application process, which causes the receiving end of the tension and pressure sensor to receive wrong data. ...

AI Technical Summary

Problems solved by technology

However, the existing mechanical testing machines cannot accurately complete the synchronous application of tension (compression) force and torque. This is mainly due to the fact that part of the tension and compression effect is generated during the torque application process, which causes the receiving end of the tension and pressure sensor to receive wrong data. , leading to inaccuracies in the synchronous application of tension and torque

This difficulty makes us only able to independently study the mechanical behavior of the sample under the action of tensile pressure or torque alone. Generally, the test results are sufficient to meet the requirements of field use, but in some specific cases, the structural load-bearing characteristics are extremely difficult. Complex, and the complex force characteristics make the load limit of the structure much lower than the expected value obtained by the above test results, which requires us to carry out laboratory bench tests or Physical operation test, but the existing test machine can not meet our requirements

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