Circumferential sealing mechanism of lower platen of universal testing machine

Abstract

The circumferential sealing mechanism of the lower pressure plate of the universal testing machine includes a metal inner cylinder whose upper end is fixed on the lower surface of the lower pressure plate, and the metal inner cylinder is sleeved on the outside of the rotating shaft. There is a distance between the lower end of the metal inner cylinder and the upper surface of the testing machine platform. The rubber cylinder fixed on the lower surface of the lower platen and the rubber cylinder is sleeved on the outside of the metal inner cylinder, an annular space is formed between the metal inner cylinder and the rubber cylinder, and a distance 2 is left between the lower end of the rubber cylinder and the upper surface of the testing machine platform, on the testing machine platform A metal sealing cylinder is fixed on the surface, the upper end of the metal sealing cylinder is sleeved on the rubber cylinder, and the inner wall of the metal sealing cylinder and the outer wall of the rubber cylinder are gap-fitted. Between the lower outer wall of the metal inner cylinder and the lower inner wall of the rubber cylinder, an elastic mechanism capable of forcing the lower end of the rubber cylinder to expand radially outwards is provided to the inclined sealing protrusion in the annular sealing groove.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a circumferential sealing mechanism of a lower pressing plate of a universal testing machine. Background technique [0002] In the field of testing, especially in the field of building materials, a universal testing machine is required. Since building materials are prone to produce scraps and dust during the testing process, the space under the lower platen of the universal testing machine is easily destroyed by waste materials. The space below the lower platen needs to be cleaned regularly. At the same time, the gap between the shaft and the shaft hole connected to the lower platen is affected by the above-mentioned waste, which causes the shaft to be stuck, etc., which affects the installation and fixation of the next specimen. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to solve the above problems, and to provide a lower pressure p...

AI Technical Summary

Problems solved by technology

[0002] In the field of testing, especially in the field of building materials, a universal testing machine is required. Since building materials are prone to produce waste materials such as scraps and dust during the testing process, the space set under the lower platen of the universal testing machine is easy to be waste. Accumulation requires regular cleaning of the space below the lower platen. At the same time, the gap between the shaft and the shaft hole connected to the lower platen is affected by the above-mentioned waste, which causes the shaft to be stuck, etc., which affects the installation and fixation of the next test piece.

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