Diaphragm capsule life test system

Abstract

The invention discloses a diaphragm capsule service life test system. The system comprises a high-temperature oven, the high-temperature oven is connected with a first switching valve, the first switching valve is connected with a second switching valve and a positive pressure generation unit, the second switching valve is connected with a vacuum generation unit, and the positive pressure generation unit comprises a high-pressure air source. The high-pressure air source is sequentially connected with a pressure reducing valve, a first electro-pneumatic proportional valve and a first electromagnetic valve, and the first electromagnetic valve is connected with the first switching valve. Thr electro-pneumatic proportional valve, the pneumatic valve, the electromagnetic valve, a pressure transmitter and the like are integrated into a full-automatic electric control system, the boosting speed is controllable, and the boosting range is adjustable. Aiming at the fatigue test of the vacuum diaphragm capsule, a large-volume buffer container is arranged and is used for equalizing the positive pressure and the negative pressure of a pipeline, so that the vacuumizing time is effectively reduced. And meanwhile, the positive pressure in the pipeline can be equalized, so that the dependence on a high-performance vacuum pump is reduced.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a bellows life test system. Background technique [0002] With the continuous progress and development of industrial modernization, people are more inclined to use test devices with high efficiency, high precision and stable performance. [0003] At present, the life test device of the bellows box is controlled by manual pressure adjustment to boost the pressure and vacuumize the bellows box product, so as to meet the pressure cycle loading required by the product, so there will be the following problems: (1) Manual pressure adjustment , the error of the final adjusted pressure value is very large. For bellows products, the pressure boost and vacuum range are all within a small range, and the required precision is high, so manual control adjustment is not advisable; (2) Operation Portability is not high. If you want to change the pressure value of boosting and vacuuming for different b...

AI Technical Summary

Problems solved by technology

[0003] At present, the life test device of the bellows box is controlled by manual pressure adjustment to boost the pressure and vacuumize the bellows box product, so as to meet the pressure cycle loading required by the product, so there will be the following problems: (1) Manual pressure adjustment , the error of the final adjusted pressure value is very large. For bellows products, the pressure boost and vacuum range are all within a small range, and the required precision is high, so manual control adjustment is not advisable; (2) Operation Portability is not high

It is impossible to realize the automatic control and execution of system boosting, pressure maintaining and pressure relief within a specific time

(4) The working conditions that the whole device can meet are relatively simple

It is impossible to conduct positive and negative pressure tests on the product at the same time; (5) For the fatigue test of the vacuum bellows, the vacuuming time is long, and the efficient test cannot be performed

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