CAJ | 학술논문

为了研究余隙容积对往复式混输泵液力端排出特性的影响，根据活塞运动规律和泵阀运动微分方程，运用动网格生成技术更新流体区域变形后的网格，对往复式混输泵的排出过程进行三维动态数值模拟。通过数值计算，得到了排出过程各个时刻流场的变化情况，探讨了余隙容积对腔内升压、瞬时流量和排出阀开启滞后角的影响。结果表明，在气液混合介质工况下，余隙容积的存在延长了内压缩过程，造成升压过程滞后、介质排出过程集中于压缩行程后半段和排出阀开启滞后角增大的不利影响，因此在设计、制造中应尽可能减小余隙容积。
위료연구여극용적대왕복식혼수빙액력단배출특성적영향，근거활새운동규률화빙벌운동미분방정，운용동망격생성기술경신류체구역변형후적망격，대왕복식혼수빙적배출과정진행삼유동태수치모의。통과수치계산，득도료배출과정각개시각류장적변화정황，탐토료여극용적대강내승압、순시류량화배출벌개계체후각적영향。결과표명，재기액혼합개질공황하，여극용적적존재연장료내압축과정，조성승압과정체후、개질배출과정집중우압축행정후반단화배출벌개계체후각증대적불리영향，인차재설계、제조중응진가능감소여극용적。
To study the influences of clearance volume on hydraulic end of reciprocating multi-phase pump,fluid field grid was updated by dynamic grid generation technology which was based on the differential equations of movements of the piston and valve,and the three-dimensional numerical simulation of discharging process was conducted.The flow field situation of each moment was ob-tained by numerical calculation,and pressure boost of cavity,instantaneous flow and delay angle of valve core opening were discussed in different clearance volumes.Results show that under the gas-liq-uid mixing medium conditions,the presence of the clearance volume extends the compression process. Then it causes the problems such as lag of boost pressure process,imbalance distribution of flow and the increasing of opening delay angle.Therefore clearance volume must be reduced as far as possible in the design and manufacture.