CAJ | 학술논문

热水循环泵广泛应用于各种增压设备，其结构是否安全可靠关系到整个机组能否正常运行。采用热-结构耦合分析方法检验热水循环泵结构的可靠性。以该泵外特性试验为基础，分别计算不同介质温度情况下流体域压力和温度，结构的温度、等效应力和总变形，并比较不同介质温度对各个量之间的影响。根据第四强度理论对泵壳结构强度校核分析。结果表明，介质温度变化对温度载荷引起的应力及变形影响大于压力载荷所引起的，在介质温度高于常温的结构分析过程中不可以忽略温度影响；随着介质温度的升高，泵结构的温度值随之增加，支架的温度高于泵体的，且温度梯度不大；泵体应力集中位于隔舌处，因此在泵体结构设计中隔舌的设计尤为关键。结构强度校核分析得到介质温度为25℃和40℃时，泵壳结构强度满足要求。
열수순배빙엄범응용우각충증압설비，기결구시부안전가고관계도정개궤조능부정상운행。채용열-결구우합분석방법검험열수순배빙결구적가고성。이해빙외특성시험위기출，분별계산불동개질온도정황하류체역압력화온도，결구적온도、등효응력화총변형，병비교불동개질온도대각개량지간적영향。근거제사강도이론대빙각결구강도교핵분석。결과표명，개질온도변화대온도재하인기적응력급변형영향대우압력재하소인기적，재개질온도고우상온적결구분석과정중불가이홀략온도영향；수착개질온도적승고，빙결구적온도치수지증가，지가적온도고우빙체적，차온도제도불대；빙체응력집중위우격설처，인차재빙체결구설계중격설적설계우위관건。결구강도교핵분석득도개질온도위25℃화40℃시，빙각결구강도만족요구。
Hot water circulation pump is widely used to various pressurization equipments. The structural safety and reliability closely relates to the normal operation of whole unit. A thermal-structural coupling method is applied to verify the structural reliability of hot water circulation pump. Based on the pump performance test, temperature, the equivalent stress and total deformation of the structure, under different medium temperature conditions, are calculated respectively. The temperature and absolute pressure of the fluid domain are also calculated when the medium temperature changes. Then, the effect of different medium temperature on each quantity is analysed. Based on the fourth strength theory, the strength check analysis in the pump casing structure is implemented. The results show that the values of equivalent stress and deformation, caused by temperature load, are greater than ones, caused by pressure load. The effect of temperature on structural strength can not be ignored especially for the medium temperature higher than the room conditions. With medium temperature rising, the structural temperature of pump increases. The temperature in pump body is higher than the one in pump bracket. But the gradient of temperature is smaller. The position of stress concentration is located at the tongue. Therefore, confirming the shape and location of the tongue is particularly important in the process of designing. The strength check result shows that the pump casing structure can meet the strength requirement when the medium temperature equals to 25℃and 40℃respectively.