汽车工程
汽車工程
기차공정
AUTOMOTIVE ENGINEERING
2015年
7期
766-771
,共6页
龚金科%黄张伟%胡辽平%李靖%余明果%陈韬
龔金科%黃張偉%鬍遼平%李靖%餘明果%陳韜
공금과%황장위%호료평%리정%여명과%진도
增压器%排气制动%轴向载荷%联动试验
增壓器%排氣製動%軸嚮載荷%聯動試驗
증압기%배기제동%축향재하%련동시험
turbocharger%exhaust braking%axial thrust%linkage test
针对车辆上同时应用排气制动与涡轮增压的情况,研究了排气制动对增压器轴向载荷的影响。通过排气制动与增压器联动试验测量了增压器在各个工况下的轴向载荷,从而确定了数值计算所需的边界条件,并通过数值计算获取了增压器在各个工况的轴向载荷的分布情况。结果表明,与正常工况相比,增压器在排气制动工况下其轴向载荷显著增大,且排气背压越高,增压器轴向载荷越大;涡轮级轴向载荷反向且增大;压气机级轴向载荷显著下降,但方向不变。
針對車輛上同時應用排氣製動與渦輪增壓的情況,研究瞭排氣製動對增壓器軸嚮載荷的影響。通過排氣製動與增壓器聯動試驗測量瞭增壓器在各箇工況下的軸嚮載荷,從而確定瞭數值計算所需的邊界條件,併通過數值計算穫取瞭增壓器在各箇工況的軸嚮載荷的分佈情況。結果錶明,與正常工況相比,增壓器在排氣製動工況下其軸嚮載荷顯著增大,且排氣揹壓越高,增壓器軸嚮載荷越大;渦輪級軸嚮載荷反嚮且增大;壓氣機級軸嚮載荷顯著下降,但方嚮不變。
침대차량상동시응용배기제동여와륜증압적정황,연구료배기제동대증압기축향재하적영향。통과배기제동여증압기련동시험측량료증압기재각개공황하적축향재하,종이학정료수치계산소수적변계조건,병통과수치계산획취료증압기재각개공황적축향재하적분포정황。결과표명,여정상공황상비,증압기재배기제동공황하기축향재하현저증대,차배기배압월고,증압기축향재하월대;와륜급축향재하반향차증대;압기궤급축향재하현저하강,단방향불변。
The effects of exhaust braking on the axial thrust of turbocharger are studied for the vehicles with both exhaust braking and turbo-charging applied. The axial thrust of turbocharger in different working conditions are measured by the linkage test of exhaust braking and turbo-charging with the boundary conditions for numerical com-putation determined, and the distribution patterns of axial thrust of turbocharger in different conditions are obtained by numerical computation. The results show that compared with normal condition, in exhaust braking condition, the axial thrust of turbocharger significantly increases ( the higher the exhaust back pressure, the larger the axial thrust of turbocharger) , the axial thrust of turbine increases with its direction reversed, and the axial thrust of compressor greatly reduces with its direction unchanged.