Contrast test method for cooling effects of cooling pipes of different materials for air cooler

Abstract

The invention discloses a contrast test method for cooling effects of cooling pipes of different materials for an air cooler. According to the method, the test is performed on the same motor; all cooling pipes are arranged in a layer-to-layer tiled manner in equal distance from the end of the cooler; the cooling pipes of different materials have identical lengths, diameters and pipe wall thicknesses; when the cooling pipes are mounted, two cooling pipes are respectively taken from steel pipes, aluminum pipes and copper pipes; the quantity of the cooling pipes selected for the test each time is unequal from 1 to 15; the cooling pipes are uniformly arranged in the air cooler; and the residual kind of cooling pipes are totally arranged at the rest positions. Since the mean air outlet temperatures of air outlets of the cooling pipes are different due to different heat conductivity coefficients of the cooling pipes, the differences of actual heat dissipation abilities of the cooling pipes of different materials with different heat conductivity coefficients can be known by measuring the mean air outlet temperatures of air outlets of the cooling pipes of different materials.

Description

technical field [0001] The invention relates to a comparative test method for cooling effects of cooling pipes made of different materials for an air cooler, in particular to a method for comparing the cooling effects of cooling pipes made of different materials for a high-voltage motor air cooler, and belongs to the technical field of mechanical design. Background technique [0002] The main voltage levels of the existing high-voltage motors are 6000V and 10000V. The cooling pipes of the air cooler can be made of different materials, mainly steel pipes and aluminum pipes. Copper pipes are rarely used. The thermal conductivity of cooling pipes of different materials is different. Use it The heat dissipation effect of the finished air cooler is also different. In order to reduce the cost, the air cooler manufacturers generally use steel pipes as cooling pipes. This is still acceptable for high-voltage motors with ordinary efficiency, but for higher-power motors with higher tha...

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Problems solved by technology

However, the exact test data and test process cannot be produced. This kind of theory is also unreasonable.

In particular, it is inconvenient and no motor manufacturer has tested the temperature rise test on three motors of the same type using different numbers of cooling pipes made of different materials and different dimensions at the same time to verify the cooling effect.

Because the coolers made of cooling tubes made of different materials have the same heat transfer, the number of cooling tubes used is different, and the specific difference in the number is the most appropriate. There is no accurate test data, so the difference in cooling effect is only An estimate, not very accurate, in reality, it often happens that the temperature rise of the motor is too high due to the unreasonable design of the air cooler

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