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532                                    摩擦学学报(中英文)                                        第 45 卷

                        9               0.6                            9               0.8

                      Wall heat transfer coefficient on  tooth/[kW/(m 2 ·K)]   6 3  0.2 270  300  330  360  Wall heat transfer coefficient on  tooth/[kW/(m 2 ·K)]   6 3  0.2 270  300  330  360
                                                                                       0.6
                                        0.4
                                                                                       0.4
                                                                                       0.0
                                        0.0





                        0                                              0
                          0      90     180    270    360                0      90     180    270    360
                                  Gear circle degree/(°)                         Gear circle degree/(°)
                                                              (a)
                       10.0             2 1                            6                2.5
                    Wall heat transfer coefficient on  tooth/[kW/(m 2 ·K)]   5.0  0  280 300 320 340 360  Wall heat transfer coefficient on  tooth/[kW/(m 2 /K)]   4 2  0.5  280300320340360
                                                                                        2.0
                                                                                        1.5
                                                                                        1.0
                       7.5
                                                                                        0.0


                       2.5


                       0.0                                             0
                          0      90     180    270    360                0      90     180    270    360
                                  Gear circle degree/(°)                         Gear circle degree/(°)
                                                              (b)     3.2     Pinion
                       1.2
                      Wall heat transfer coefficient/(kW/m 2 )  1.0  Pinion tooth  Wall heat transfer coefficient at meshing interface/(kW/m 2 )  2.8
                               Wheel tooth
                               Wheel face
                                                                              Wheel
                               Pinion face
                       0.8
                                                                      2.4
                       0.6
                                                                      2.0
                       0.4
                       0.2
                                                                      1.2
                           40   60  80  100  120  140  160            1.6  40  60  80  100  120  140  160
                                   Gear velocity/(m/s)                            Gear velocity/(m/s)
                                        (c)                                            (d)

                  Fig. 8    Distribution of convective heat transfer coefficient: (a) 40 m/s; (b) 160 m/s; (c) average value of tooth surface
                                                and end surface; (d) meshing area
                              图 8    对流换热系数分布:(a) 40 m/s;(b) 160 m/s;(c)齿面、端面均值;(d)啮合区


                         −7
                                       2.8 4.6
             P w1 = 2.82×10 ×(1+2.3b/r 1 )n r (0.028µ 0 +0.019) 0.2       表 4    文献[23]与本文齿轮参数
                                       1
                                         1
                                                        (6)       Table 4    Gear parameters in Ref [23] and this work
                对于锥齿轮,风阻损失表达为                                       Parameters  Physical properties  Middle tooth width
                                                                                  of the gear 2  parameter of the pinion
                               −7                 2.8             Number of teeth    36             32
                   P w1 =2.82×10 [1+4600b/(m mt z 1 )]n ·
                                                  1
                                                        (7)      Normal module/mm    4.00          3.25
                                  4.6
                        (m mt z 1 /2000) (0.028µ 0 +0.019) 0.2
                                                                Transverse module/mm  4.000 0     3.967 5
            式中,   p w1 为齿轮风阻损失,单位为kW; 为齿轮分度                      Pitch diameter/mm  144.000       126.961
                                              r 1
                                                                  Face width/mm      30             17
            圆半径,单位为m;        n 1 为齿轮转速,单位为r/min;      µ 0 为
            流体动力黏度,单位为mPa·s;m 为锥齿轮的当量模                             文献[23]试验测量了齿轮在角速度200~1 200 rad/s
                                        mt
            数,单位为mm;z 为齿数.                                     情况下的风阻损失,该工况范围的试验结果对比经验
                           1
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