噪声对人类正常的生产劳动、生活和工作会带来很多不良影响,近几年来,随着工农业生产的发展,人们逐步认识到噪声危害的严重性,已研究和采用各种措施来进行防治。作为通用机械的通风机,在工农业各方面得到广泛应用,因而它在很多场合下也是产生噪声的主要声源。一机部向上海通惠机器厂、上海交通大学等单位提出了为中国革命纪念馆研制低噪声通风机的任务。我们经过一年多的设计和试验,基本上完成了低噪声通风机样机研制及鉴定工作,其样机的噪声指标已接近七十年代国际先进水平。样机的性能参数及特征 Noise has many adverse effects on normal labor, life and work of mankind. In recent years, with the development of industrial and agricultural production, people have come to realize the seriousness of noise hazards and have studied and adopted various measures to prevent and control them. As a general mechanical ventilator, widely used in all fields of industry and agriculture, it is also the main source of noise in many occasions. A machine department to the Shanghai Tonghui Machine Factory, Shanghai Jiaotong University and other units proposed for the Chinese Revolutionary Memorial Hall to develop low-noise fan mission. After more than a year of design and testing, we basically completed the development and appraisal of prototypes for low noise ventilators. The noise index of our prototypes is close to the international advanced level in the 1970s. Prototype performance parameters and characteristics