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Air conditioner compressor tubing vibration reliability evaluation method

A compressor and reliability technology, applied in computer-aided design, special data processing applications, instruments, etc., can solve problems such as difficulty in comprehensively detecting piping stress, make up for test and test defects, reduce fatigue fracture risk, and improve vibration reliability. Effect

Inactive Publication Date: 2018-03-16
四川长虹空调有限公司
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for evaluating the reliability of the piping vibration of the air-conditioning compressor. After identifying the compressor excitation, use simulation means to monitor the bending position and stress of the piping when the compressor is operating at various frequency points. Concentrate the stress on the part to solve the problem that the stress test is difficult to fully detect the piping stress

Method used

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  • Air conditioner compressor tubing vibration reliability evaluation method
  • Air conditioner compressor tubing vibration reliability evaluation method
  • Air conditioner compressor tubing vibration reliability evaluation method

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Embodiment

[0065] Such as figure 1 As shown, the air-conditioning compressor piping vibration reliability evaluation method in this embodiment includes the following steps:

[0066] In the first step, through the stress test, the stress values ​​of the first and second bending positions of the suction and exhaust pipes of the inverter air conditioner in the stable operation state of each frequency point are obtained, respectively denoted as σ 1j (w j ), σ 2j (w j ), σ 3j (w j ), σ 4j (w j ), where j is the number of compressor operating frequency points. This part is the dynamic response in the classification of vibration problems.

[0067] The second step is to conduct modal experiments on the air conditioner compressor piping first, and obtain its first 20 order modal parameters, mainly the natural frequency w i (1≤i≤20), and then conduct modal simulation analysis on the air conditioner compressor distribution piping system, and obtain the first 20 modal parameters, mainly the...

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Abstract

The invention relates to air conditioner technologies and discloses an air conditioner compressor tubing vibration reliability evaluation method. After compressor excitation is recognized, a simulation means is utilized to monitor stress at bending positions and a stress centralized part of a compressor during tubing vibration when all frequency points are in an operating state, and the problem that it is difficult to comprehensively detect tubing stress in a stress test is solved. The method comprises the steps that a, an air conditioner tubing vibration test is performed; b, finite element model system recognition is performed; c, compressor load recognition is performed; d, a response is calculated through simulation; e, response error analysis is performed; and f, tubing stress risk point recognition is performed. Through the method, it is not needed to directly test load excitation in the compressor, the load recognition technology is utilized to accurately calculate a load excitation value of the compressor, and then a stress value of the part difficult to monitor in the stress test is accurately calculated through the simulation means, so that the defect of the stress test is overcome, the air conditioner tubing fatigue crack risk is lowered, and tubing vibration reliability is improved.

Description

technical field [0001] The invention relates to air-conditioning technology, in particular to a method for evaluating the reliability of piping vibration of an air-conditioning compressor. Background technique [0002] In the air conditioner compressor piping system, the compressor is used as an excitation source to drive the vibration of the piping components connected to it. The vibration simulation of the compressor piping system needs to know the excitation form and value of the compressor in order to accurately simulate the vibration characteristics of the piping. The excitation of the compressor is mainly the unbalanced force generated by the rotation of its internal eccentric rotor. Since the rotor is inside the compressor cylinder, it is difficult to measure the magnitude of the unbalanced force. Therefore, the simulation data obtained by numerical simulation cannot be accurate and comprehensive. assessment of piping vibration. [0003] In the air-conditioning indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 李磊鑫
Owner 四川长虹空调有限公司
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