通过分析三叶圆弧──圆弧包络线齿型和逆流冷却对面积利用系数、泄漏量、排气温度和排气气流脉动的影响，说明了这两项技术的利用能提高高压比和高吸气温度时罗茨鼓风机的效率和可靠性，降低其振动和噪声，扩大其应用范围． By analyzing the effects of cloverleaf-circular arc profile and countercurrent cooling on area utilization factor, leakage volume, exhaust gas temperature and exhaust gas flow pulsation, it is shown that the utilization of these two technologies can improve the high pressure ratio and Roots blower efficiency and reliability at high suction temperatures reduce its vibration and noise and expand its range of applications.