高速透平单斜齿轮弹热变形及其修形研究

Resilience and thermal deformation for single bevel gear of high speed turbine and its modification research

针对高速透平单斜齿轮传动在啮合过程中产生的啮入冲击大、齿向偏载明显的问题,对造成上述现象的单斜齿轮弹性变形和热变形进行了研究,提出了适合高速透平单斜齿轮的修形措施。对齿廓修形中的齿顶修形高度通过二种不同的计算方法进行了比较,确定了比较合适的齿顶修形高度计算方法;对计算齿顶修形量时要考虑的基节偏差,齿形误差等作了量化处理;从而确定了高速透平单斜齿轮的齿廓修形和齿向修形方法;应用该方法对一台高速齿轮箱产品的单斜齿轮实施了修形,并与同等线速度未修形的高速齿轮箱进行了空负荷试车数据对比。研究结果表明,修形齿轮箱的噪声下降了3 d B(A)~4 d B(A),振动降低了2μm^3μm;可见通过修形能有效地改善轮齿的啮合性能,降低振动和噪声。

Aiming at the large impact for approach action caused during the mesh and obvious tooth direction eccentric load for single bevel gear transmission of high speed turbine,research was carried out for the resilience thermal deformation of singe bevel gear which caused the above phenomenon,and the modification measure applicable for the single bevel gear of high speed turbine was put forward. Two different calculation methods were adopted to compare the addendum modification height of tooth profile modification,and the relatively suitable method for calculation of addendum modification height was determined; Quantitative treatment was done for base pitch deviation and tooth shape error etc which need to be considered for the calculation of the addendum modification amount,so that the methods of profile modification and axial modification for single bevel gear of high speed turbine were ascertained. The method was applied to modify the single bevel gear for a unit of high speed gear box,and compared with the no load commissioning data of high speed gear box of the equivalent linear velocity which hadn＇t yet modified. The results indicate that the noise of the modified gear box has reduced 3 d B（ A） ~ 4 d B（ A）,and the vibration has reduced 2 μm ~ 3 μm. Through modification,the mesh performance of the gear has been effectively improved so as to reduce the vibration and noise.