ZNR2.4罗茨机械增压器性能试验研究

建立了机械增压器性能测试试验台，对自主研发的ZNR2.4罗茨机械增压器的绝热效率、容积效率、轴功率消耗和噪声等进行了试验研究,得到了ZNR2.4罗茨机械增压器性能随转速和压比的变化规律。研究结果表明：绝热效率受压比影响较大，压比在1.3附近时绝热效率最高；容积效率随着转速的提高而不断提高，当转速在3 500 r/min以上时，容积效率高于70%；轴功率随转速的提高不断增大，最大为0.7 kW；噪声随转速提高而增大，但声压级均值小于85 dB(A)，最大值不超过95 dB(A)。研究结论为罗茨机械增压器的后续改进和优化提供试验参考。

Experimental Investigation on ZNR2.4 Roots Superchargers

A performance test-bed of superchargers was created, the adiabatic efficiency, volume efficiency, shaft power consumption and noise of the independently developed ZNR2.4 Roots superchargers were studied. The variation rules of ZNR2.4 Roots superchargers with the speed and pressure ratio were obtained. The results show that the adiabatic efficiency is affected by the compression ratio and the adiabatic efficiency is the highest when the pressure ratio is near 1.3. The volume efficiency increases with the increase of speed, and it is higher than 70% when the speed is above 3 500 r/min. The shaft power increases with the increase of speed, and the maximum is 0.7 kW. The noise increases with the increase of speed, but the average sound pressure level is less than 85 dB(A), the maximum will not be more than 95 dB(A). The research results provide the experimental reference for the subsequent improvement and optimization of the Roots superchargers.