Experiment analytical method for vibration performance of variable frequency air conditioner tubing

Abstract

The invention discloses an experimental analysis method of the vibration characteristic of variable-frequency air conditioner tubing and comprises the following steps: (1) an experimental model machine, a chip for regulating frequencies, a mass block and a damping block are prepared; (2) the chip for regulating frequencies is used for leading an air conditioner to stably run in different working conditions with frequencies from the lowest frequency to the highest frequency in each interval of 2 Hz; (3) the tubing vibration conditions in each running frequency are tested and recorded; the tubing vibration conditions at each frequency point after loading the mass block are retested and recorded; the tubing vibration conditions at each frequency point after loading the damping block are retested and recorded; (4) the working condition of an experimental laboratory is adjusted so as to lead the air conditioner to run in different working conditions; then step 3 is repeated for testing the tubing vibration conditions in different working conditions; (5) a tubing vibration characteristic figure is fit according to testing data; (6) according to a plurality of tubing vibration characteristic figures, the frequency range with larger tubing vibration and the tubing vibration change conditions after changing the tubing mass and damping are analyzed so as to effectively evaluate and analyze the vibration characteristic of the variable-frequency air conditioner tubing. The experimental analysis method of the vibration characteristic of the variable-frequency air conditioner tubing can effectively evaluate and analyze the vibration characteristic of the variable-frequency air conditioner tubing and is favorable for designing the tubing with qualified vibration and high reliability.

Description

technical field [0001] The invention relates to an experimental analysis method for the vibration characteristics of frequency conversion air conditioner piping, which belongs to the innovative technology of the experimental analysis method for the vibration characteristics of frequency conversion air conditioner piping. Background technique [0002] Air conditioner pipeline vibration has always been the focus and difficulty of air conditioner reliability design, while the traditional air conditioner pipeline vibration design is mostly designed based on experience, and the evaluation test method is mainly the amplitude (acceleration) and natural frequency test. Wider and more frequency operation, the pipeline vibration design is more complicated and difficult. At present, the common test methods for the vibration characteristics of air-conditioning piping are as follows: [0003] 1) The amplitude (acceleration) test is used to evaluate the vibration value of the air conditi...

AI Technical Summary

Problems solved by technology

[0003] 1) The amplitude (acceleration) test is used to evaluate the vibration value of the air conditioner during operation, but this test method can only judge whether the vibration of the air conditioner piping is qualified, but cannot obtain the vibration characteristics of the piping, and cannot provide ideas and directions for piping design and piping improvement

[0004] 2) Check whether the piping will resonate through the natural frequency. At present, the percussion method is generally used for testing, but because the piping is a lightweight shell structure and the structure is relatively complex, the experiment will be more difficult, and the results are prone to deviations , In addition, the natural frequency test is performed when the air conditioner is stopped, which is different from the actual operating state of the air conditioner

Especially in the aerospace, automotive and other industries, it has been gradually applied, but due to the need for analysts to master relatively deep theoretical knowledge, a large reference database is required, and many factors such as boundary conditions and material parameters need to be considered during operation. Therefore, For the air conditioning industry there are efficiency issues and accuracy issues

Images