Optimization and innovative design of surface groove of TPS sling-oil retainer
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摘要:
针对涡轮动力仿真器现有的端面半圆线槽型甩油盘未能实现对内部循环流场的散热和润滑最大效能的问题，开展以降低最大流场温度和减弱涡流效应的槽型优化研究。提出了包括拋物线、渐开线、对数螺旋线等槽型新结构，并探讨了槽深、槽数、螺旋角系数等单一因素对流场特性的影响规律，采用正交试验法对多因素多目标的槽型结构参数进行了优化。结果表明：对数螺旋线槽型为一类更能提高润滑和散热的最优结构，利用正交试验法优化出的一组最优对数螺旋线槽型参数槽深为6 mm、槽数为10、螺旋角系数为0.4，以此设计了面向更高工况条件下的新型甩油盘结构，并仿真分析了其在典型工况下的流场特性。
Abstract:Owing to failure of existing semi-circular grooved sling-oil retainer in the turbine power simulator to achieve the maximum efficiency of heat dissipation and lubrication of the internal circulating flow field, the parameters’ optimization research of the sling-oil retainer for reducing the maximum flow field temperature and the eddy flow effect was carried out. The new groove (including parabola, involute, logarithmic spiral, etc.) structures for the sling-oil retainer were proposed, and the influence of single factor (such as groove depth, groove number and helix angle coefficient) on the flow field characteristics was discussed. The multi-factor and multi-objective parameters were optimized by the orthogonal experiment method. The results showed that the logarithmic spiral groove was an optimal structure that can effectively improve the lubrication and heat dissipation performance, and a set of optimal logarithmic spiral groove parameters by orthogonal experiment method were represented by groove depth of 6 mm, groove number of 10, and helix angle coefficient of 0.4. Based on the results, a new type of sling-oil retainer for more harsh working conditions was designed, and its flow field characteristics under typical working conditions were obtained by the theoretical simulation.
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图 2 半圆线槽型甩油盘示意图（单位：mm）
Figure 2. Schematic diagram of semicircular groove type sling-oil retainer （unit: mm）
图 4 流体域模型关键节点在截面上的分布
Figure 4. Distribution of key nodes of fluid domain model on cross section
图 7 温度场分布图（不同槽型）
Figure 7. Temperature field distribution diagram （different groove types）
图 8 流场压力与流速分布（不同槽型）
Figure 8. Flow field pressure and velocity distribution diagram （different groove types）
图 9 节点2处压力与节点4处流速涡动图（不同槽型）
Figure 9. Vortex diagram of pressure at node 2 and flow velocity at node 4 （different groove types）
图 10 温度场分布图（不同槽数）
Figure 10. Temperature field distribution diagram （different groove numbers）
图 11 流场压力与流速分布（不同槽数）
Figure 11. Flow field pressure and velocity distribution diagram （different groove numbers）
图 12 节点2处压力与节点4处流速涡动图（不同槽数）
Figure 12. Vortex diagram of pressure at node 2 and flow velocity at node 4 （different groove numbers）
图 13 温度场分布图（不同槽深）
Figure 13. Temperature field distribution diagram （different groove depths）
图 14 流场压力与流速分布图（不同槽深）
Figure 14. Flow field pressure and velocity distribution diagram （different groove depths）
图 15 节点2处压力与节点4处流速涡动图（不同槽深）
Figure 15. Vortex diagram of pressure at node 2 and flow velocity at node 4 （different groove depths）
图 16 不同螺旋角系数下的对数螺旋线槽型
Figure 16. Logarithmic spiral groove with different helix angle coefficients
图 17 温度场分布图（不同螺旋角系数）
Figure 17. Temperature field distribution diagram （different helix angle coefficients）
图 18 流场压力与流速分布图（不同螺旋角系数）
Figure 18. Flow field pressure and velocity distribution diagram （different helix angle coefficients）
图 19 节点2处压力与节点4处流速涡动图（不同螺旋角系数）
Figure 19. Vortex diagram of pressure at node 2 and flow velocity at node 4 （different helix angle coefficients）
图 20 不同水平与最高温度的关系
Figure 20. Relationship between different levels and maximum temperature
图 21 不同水平与压差的关系
Figure 21. Relationship between different levels and pressure difference
表 1 润滑油性能参数
Table 1. Lubricating oil performance parameters
参数 数值 ρ/（kg/m3） 865 cp/（J/（kg·℃）） 2000 λ/（W/（m·℃）） 0.138 μ /（kg/（m·s）） 0.001 
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表 2 正交试验表
Table 2. Orthogonal test table
试验因素 符号 水平1 水平2 水平3 水平4 槽型 A 半圆线 抛物线 渐开线 对数螺旋线 槽深/mm B 4 5 6 6.8 槽数 C 6 8 10 12
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表 3 正交试验的试验方案及计算结果
Table 3. Test scheme and calculation result of orthogonal test
试验
序列试验方案 计算结果 槽型 槽深/mm 槽数 最高温度/℃ 最大压差/Pa 1 半圆线 4 6 40.5 124350 2 半圆线 5 8 49 28600 3 半圆线 6 10 40.2 110870 4 半圆线 6.8 12 53 68970 5 拋物线 4 10 37.5 144260 6 拋物线 5 12 45 192340 7 拋物线 6 6 36.5 125580 8 拋物线 6.8 8 37 95940 9 渐开线 4 8 39 149810 10 渐开线 5 6 34.3 198170 11 渐开线 6 12 40.5 61530 12 渐开线 6.8 10 35.5 122169 13 对数螺旋线 4 12 35 283470 14 对数螺旋线 5 10 33.5 299380 15 对数螺旋线 6 8 34.2 254280 16 对数螺旋线 6.8 6 36 219270
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表 4 最高温度极差分析
Table 4. Maximum temperature range analysis
试验指标 参数 槽型A 槽深B 槽数C 最高温度/℃ K1 182.7 152 147.3 K2 156 161.8 159.2 K3 149.3 151.4 146.7 K4 138.7 161.5 161.5 k1 45.66 38 36.83 k2 39 40.45 39.8 k3 37.33 37.85 36.68 k4 34.68 40.38 40.38 极差R 11 2.6 3.7 主次顺序 A>C>B 优水平 A4 B3 C3 优组合 A4B3C3
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表 5 最大压差极差分析
Table 5. Maximum differential pressure range analysis
试验指标 参数 槽型A 槽深B 槽数C 最大压差/Pa K1 332790 701890 667370 K2 558120 718490 528630 K3 531679 552260 676679 K4 1056400 506349 606310 k1 83197.5 175472.5 166842.5 k2 139530 179622.5 132157.5 k3 132919.75 138065 169169.75 k4 264100 126587 151577.5 极差R 180902.5 53035.25 37012.25 主次顺序 A>B>C 优水平 A4 B2 C3 优组合 A4B2C3
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