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本文首先研究了真空钎焊条件对热管性能的影响,进而在最优条件下制作了热管及热管式真空集热管,并和市场上销售的产品进行了性能比较。在我们的实验条件下,最佳的热管真空钎焊工艺为:钎料成分为BAg44CuZn钎料,钎焊真空度为5×10-3Pa,真空钎焊功率为7.6 kW,钎焊间隙为0.08 mm。采用此工艺制作的热管其老化后的性能几乎不变,远优于市场上销售的热管,组装成热管式真空集热系统以后,其集热性能也比现有产品大为提高。
In this paper, the influence of vacuum brazing conditions on the performance of the heat pipe is studied first, and then the heat pipe and the heat pipe vacuum heat-collecting tube are fabricated under the optimal conditions, and the performances are compared with those on the market. Under our experimental conditions, the best heat pipe vacuum brazing process is as follows: the brazing filler metal is BAg44CuZn brazing filler metal, the brazing vacuum degree is 5 × 10-3Pa, the vacuum brazing power is 7.6 kW and the brazing gap is 0.08 mm . The heat pipe produced by this process has almost the same performance after aging, which is much better than the heat pipe sold on the market. After assembled into a heat pipe type vacuum heat collecting system, the heat collecting performance of the heat pipe is greatly improved compared with the existing products.