【摘要】 针对涡旋压缩机平衡铁因润滑油阻力导致功率损耗较高的问题，提出对平衡铁前后端面采用圆顶凸面与圆弧倒角设计，并将润滑油从后端面引出的优化模型。基于FLUENT软件的滑移网格模型，对变转速工况下背压腔内平衡铁的转动过程开展了瞬态模拟，计算了平衡铁所受的阻力矩及其产生的轮阻损失，并验证了模拟结果的准确性。结果表明，平衡铁前后端面产生的压差阻力矩占总阻力矩的76.9%，且其随转速升高的幅度远大于摩擦阻力矩；优化后，平衡铁后端面的平均压力随转速增大而升高，其压差阻力矩与总阻力分别降低了63.3%和58.1%；此外，增大平衡铁厚度与外径的比值，可使轮阻损失最高降低40.6%。研究可为涡旋压缩机的优化设计提供参考。更多还原

【Abstract】 To address the issue of high power loss caused by lubricating oil resistance in the counterweight of scroll compressors,an optimized model was proposed featuring dome convex surfaces and circular arc chamfers on the front and rear end faces of the counterweight,along with lubricating oil diversion from the rear end face.Based on the sliding mesh model in FLUENT software,transient simulations were conducted on the rotation process of the counterweight in the backpressure chamber under variable,speed conditions.The resistance torque acting on the counterweight and the resulting windage loss were calculatedand the accuracy of the simulation results was verified.The results show that the differential pressure resistance torque generated by the front and rear end faces of the counterweight accounts for 76.9% of the total resistance torque,and its increase with rotational speed is significantly greater than that of the frictional resistance torque.After optimization,the average pressure on the rear end face of the counterweight increases with rotational speed,while the differential pressure resistance torque and total resistance are reduced by 63.3% and 58.1%,respectively.Additionally,increasing the ratio of counterweight thickness to outer diameter can reduce windage loss by up to 40.6%.This study provides a reference for the optimal design of scroll compressors.更多还原