轴径向支架安放角对灯泡贯流式水轮发电机通风结构的影响

Placement angle effect of axial and radial stent on ventilation structure in bulb tubular turbine

为了研究支架结构形式对灯泡贯流式水轮发电机轴径向通风结构散热效果的影响,根据风力机工作原理,设计了前弯式支架通风结构,在增加径向安放角的基础上,调整轴向安放角,应用流体流动理论进行分析,对模拟数据进行试验可靠性验证.结果表明:合理的增加轴径向安放角能提高灯泡贯流式水轮发电机组的散热和单面进风的径向进风;径向安放角为15°时比径向安放角为0°时绕组的最高温度低3.4%;在径向安放角为15°,轴向安放角为20°时比轴向安放角为40°时绕组的最高温度低5.0%.径向安放角15°,轴向安放角20°时,散热效果最佳,使得整机主要产生热量部件发电机的温度不超过55℃.

According to the principle of wind turbine, a forward inclined support was designed on light bulb tubular turbine to study the heat dissipation effect of axial or radial direction ventilation structure. Based on the increasing of radial angle, the axial angle was changed to verify the simulation data by relia- bility verification tests. The results show that a reasonable increase of radial or axial angle can improve the heat dissipation performance and single-sided radial air intake. The maximum temperature of winding with radial angle of 15° is 3.4% lower than that with radial angle of 0°. The maximum temperature of winding with axial angle of 20° is 5.0% lower than that with axial angle of 40° when the radial angle is 15°. The optimal heat dissipation performance can be achieved with radial angle of 15° and axial angle of 20°,and the temperature of main heating components of electric generator in whole machine can be con- trolled not more than 55 ℃.