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    188宝金博页面版: 咖啡机的失效评估外文文献翻译、中英文翻译、外文翻译

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    内容提示： 外文翻译 Failure evaluation of coffee maker ABSTRACT:The coffee maker was disassembled, and the characteristics, working principle and process of each unit and component were investigated in this paper. The response of the system under abnormal operation conditions was found through simulating test. And the failure modes of each unit failing in the test were analyzed based on the characteristics of mate-rial, structure and service condition. The failure evaluation of the coffee maker system was made usin...

    文档格式：DOCX | 页数：15 | 浏览次数：10 | 上传日期：2022-05-17 15:43:15 | 文档星级：
    外文翻译 Failure evaluation of coffee maker ABSTRACT:The coffee maker was disassembled, and the characteristics, working principle and process of each unit and component were investigated in this paper. The response of the system under abnormal operation conditions was found through simulating test. And the failure modes of each unit failing in the test were analyzed based on the characteristics of mate-rial, structure and service condition. The failure evaluation of the coffee maker system was made using the reliability analysis methods such as failure mode and effect analysis, fault tree analysis etc. The results show that the coffee maker can basically meet the demands for functionality. However, the hidden hazard caused by design exists for the pressure relief pipeline, which needs further improving. Inf l ammation and explosion etc. can hardly occur to the coffee maker, but leakage of steam may take place, which should be avoided. The quality of some units in the coffee maker are poor, which is detrimental to safe use of long term, and improved processing are needed. 1. Introduction The main objective of this study is to evaluate whether the designed function of one kind of coffee maker can realized and is safe enough or not in the work process when it is abnormally or improperly operated. First, the components and units of every subsystem were disassembled. Then possible failure modes of each unit were analyzed based on the characteristics of material, structure and service conditions. The possible failure modes of each component were inferred from the combina-tion of the inf l uence of unit failure on components and simulation test demonstration. Finally, security and reliability of the whole system were evaluated based on the results on the components. 2. Structural features and analysis of system functions 2.1. Classif i cation of subsystems Structural features and analysis of system functions are fundamental to both failure and system safety evaluation [1,2]. According to function characteristic, the coffee maker can be separated into three relatively independent subsystems. (1) Water circulation system. It is the center working system of the coffee maker which accomplished by supply, drawing, heat-ing and output process. This circulation system consists of the following components, water reservoir, fl ow meter, pump, heater, trifurcate tube connector, brew basket, pod holder, relief valve, check valve and tube. (2) Electric control system. The electric control system acts as a nerve center (cerebrum) of the coffee maker, carrying out automation control by program including working process control and error response management etc. According to function, the electric control system is composed of in-out circuit, processor and electric support circuit. Main parts of in-out circuit include negative temperature coeff i cient (NTC), thermostat, thermal cut off and beep. The processor refers to the master integrate circuit(IC). The electric support circuit includes capacitance, resistance, inductance, triode, tri-voltage regulator, transformer, wire and plug-in board. (3) Shell structure system. The shell structure system, which composed of front shell, rear shell, chassis, lid and skeleton, is in charge of protecting and supporting the whole system. 2.2. Analysis of working process

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