Experimental Study On Enhancing Heat Transfer Performance Of Heat Pipe Grinding Wheel

The bottleneck problems of high efficiency grinding are burn of the workpiece surface and quickwearing of grinding wheel caused by high grinding temperature which impose restriction on highefficiency grinding’s further development. On the basis of summing up the mechanism of heat transferin the grinding contact zone, the brand-new idea about enhancing heat transfer in grinding zone basedon Heat Pipe Grinding Wheel (HPGW) combined with its research status, the idea about simulatingthe heating condition of the grinding contact zone quantitatively and measure temperature of HPGWaccurately to evaluate heat transfer performance on HPGW comprehensively was putting forward inthis paper. The influence of cooling condition, working fluid, rotating speed of the grinding wheel andheating power on heat transfer performance of HPGW was analyzed. Finally, by contrast withnon-HPGW under the same experiment conditions, the superiority in heating transfer of HPGW wasproved. Focused on this idea, following investigations were carried out:(1) The overall design requirements of evaluation system of enhancing heat transfer performanceon HPGW were put forward According to the technology of rotary heat pipe, HPGW matrix wasdesigned, including matrix’s structure, working fluid and wall material. Meanwhile, detailed designswere carried out for the system, such as heating device, temperature measuring system, signalacquisition and processing, cooling condition, etc.(2) HPGW matrix was manufactured and its vacuum pumping, working fluid filling and sealingwas achieved. The evaluation system was developed to simulate the heating condition of grindingcontact zone quantitatively and measure temperature of HPGW accurately and steadily. The systemwas assembled and debugged. Debugging results showed that the system can be used to gather thermoelectrical potential signals of HPGW, thus can meet the needs of the experiments to be carried out.(3) The experimental study on simulating the heating condition of the grinding contact zone withthe HPGW was completed. The influence of cooling condition, working fluid, rotating speed of thegrinding wheel and heating power on the heat transfer performance of HPGW was analyzed. Bycontrast with the non-HPGW under the same experiment conditions, the superiority in heating transferof HPGW was proved.