欧美国产日韩a欧美在线视频 I 成人a毛片 I 色翁荡熄又大又硬又粗又视频图片 I 日本中文视频 I 天天做天天爱夭大综合网 I 天堂av免费 I 成人在线免费观看网址 I 日本亲子乱子伦 I 日韩欧美日韩欧美 I 综合色九九 I 狂野av人人澡人人添 I 国产精品视频专区 I 国产精品露脸国语对白 I 国产亚洲欧洲av综合一区二区三区 I 欧精国精产品一区 I 国产福利在线看 I 国产www性 I 欧美婷婷精品激情 I 久久爽久久爽久久免费观看 I 国产亚洲精品久久久久动漫 I 一区二区三区中文字幕在线观看 I 日本道中文字幕 I 午夜成人亚洲理论片在线观看 I 国内精品自国内精品自线 I 2024国产精品自拍 I 亚欧乱色熟女一区二区三区 I 精品国产综合色在线 I 好男人资源在线社区 I 男人和女人性生活视频 I 国产vs韩国vs美国vs欧洲

Fan is the abbreviation of gas compression and gas transportation machinery in China. Generally speaking, the fans include: ventilators, blowers, wind turbines. Gas compression and gas transport machinery is the conversion of mechanical energy into gas pressure energy and kinetic energy, and the gas transported out of the machinery.

The main structural components of the fan are impeller, chassis, air inlet, bracket, motor, pulley, coupling, silencer, transmission (bearing) and so on.

The non-power ventilator is the use of natural wind and indoor and outdoor temperature difference caused by air convection, to promote the rotation of the turbine to use the centrifugal force and negative pressure effect will be indoor fresh hot air discharge.

Fan related to the system of energy transmission and distribution, building energy is a very critical part. According to the National Air Conditioning Equipment Quality Supervision and Inspection Center for many years the fan test shows that many fans in the rated operating conditions are problems, so the need to strictly in accordance with product standards require the production and manufacture of fans.

The fan at the beginning of the work of the bearing parts of the vibration is very small, but with the running time lengthened, the fan dust will be unevenly attached to the impeller, and gradually destroy the dynamic balance of the fan, the bearing vibration gradually increased, once the vibration reaches the fan When the maximum permissible value is 11mm / s (the maximum allowable value is indicated by the amplitude value), the fan must be shut down to repair (to clear the dust accumulation and to re-move the balance). Because this time is already very dangerous, users must not be forced to use. In the fan vibration close to the dangerous value, there will be vibration alarm instrument will be alarm.