Test piece guide-in mechanism of ceramic material heating thermal shock test box

Abstract

The invention discloses a test piece guide-in mechanism of a ceramic material heating thermal shock test box. The test piece guide-in mechanism comprises a guide cylinder. A guide cylinder opening for placing a test piece is formed in the lateral side of the upper portion of the guide cylinder. A connecting lug for fixing the guide cylinder is disposed at the lower end of the guide cylinder opening. Two opposite rotary shaft supports are disposed on the lateral side below the connecting lug. A rotary shaft penetrates the two rotary shaft supports. Two ends of the rotary shaft extends out of the two rotary shaft supports. A retaining piece is mounted on the rotary shaft between the two rotary shaft supports. The retaining piece extends into the guide cylinder through a slot in the lateral wall of the guide cylinder. The rotary shaft extending end close to the connecting lug side is provided with a counter weight hanging rod. The suspension end of the counter weight hanging rod is provided with counter weight. The other extending end, opposite to the counter weight hanging rod, of the rotary shaft is provided with a shifting piece. A suspension wire is disposed at the top end of the guide cylinder. The test piece guide-in mechanism has the advantages that a normal-temperature cavity isolated from a heating furnace can be built, and the test piece is prevented from being radiated by high temperature; mechanical shock of the test piece is avoided, heating-resistance thermal shock performance tests can be performed on multiple test pieces at the same time, and high efficiency is achieved.

Description

technical field [0001] The invention relates to a thermal shock resistance test device, in particular to a test piece introduction mechanism of a ceramic material thermal shock test box. Background technique [0002] Ceramic materials are widely used in the field of high-temperature structures due to their high melting point and excellent chemical and physical stability at high temperatures, such as thermal protection materials for hypersonic aircraft and hot ends of engines. However, ceramic materials have poor thermal shock resistance due to their brittleness. For ceramic materials used in high-temperature structures, especially in the field of aerospace, they are often damaged due to severe thermal shocks in the use environment. Therefore, it is very necessary and important to study the thermal shock resistance of ceramic materials. [0003] Chinese patent document CN104483224A disclosed "a test chamber for heating thermal shock of ceramic materials" on January 14, 2015...

AI Technical Summary

Problems solved by technology

[0004] 1. It takes a lot of time to install the test piece on the clamping mechanism and guide wire, and only one test piece can be clamped in one experiment, so the efficiency is relatively low;

[0005] 2. Since there is no special room temperature chamber designed to store the test piece before the thermal shock test, and the clamped test piece is relatively close to the heating furnace, it is easily affected by the high temperature radiation of the heating furnace;

[0006] 3. When the test piece enters the heating furnace, it falls directly onto the cushion in the way of free fall, which cannot avoid tiny mechanical shocks.

[0007] The above problems lead to large errors in the test process, resulting in the experimental results not being able to characterize the thermal shock resistance of ceramic materials, and the efficiency is low

Images