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  • 您知道怎么样检测无尘车间的风速吗?
    来源: 浏览:次 发布日期:2018-11-16
    单向流的风速基本稳定,气流的方向基本同样,进风口附近的风速与work面的风速差别不大,而且整个无尘车间内的风速均匀性较好,一般可以不揣摩风速的均匀性。
    The wind speed of one-way flow is basically stable, and the direction of air flow is basically the same. There is little difference between the wind speed near the intake and that of the working face, and the uniformity of the wind speed in the whole dust-free workshop is good. Generally, the uniformity of the wind speed can not be considered.
    非单向流各个部位的风速和风向不尽同样,整个无尘车间内的风速均匀性较差,需要揣摩风速的均匀性,有时需要分别测定各个部位的风速。
    The wind speed and direction of each part of non-unidirectional flow are different. The uniformity of wind speed in the whole dust-free workshop is poor. It is necessary to consider the uniformity of wind speed. Sometimes it is necessary to measure the wind speed of each part separately.
    测定风速时,需要预先判断风向,因为一般风速计的探头都有方向性,测定风速时需要认清方向。由于进风口的气流是发散的,以是测定进风口的风速一般需要先加风罩。
    When measuring wind speed, it is necessary to judge the direction of wind beforehand, because the probe of general anemometer has directivity, so it is necessary to recognize the direction when measuring wind speed. Since the air flow at the intake is divergent, it is usually necessary to add a wind shield to determine the wind speed at the inlet.
    (1)用热球风速计测定风速,用热球风速计测定风速时一种常用的方法。一般热球风速计的灵敏度较高,然则稳定性较差。以是用热球风速计测定的风速应care一下药材铺:检查风速计外观和work状态是否正常;测定上应校正风速计的零位;校正零位时探头应处于无风状态;测定无尘车间的风速时风速计探头的迎风面应垂直于风向;等待显示稳定以下再读数;应小心防止风速计的探头碰到其他物体。
    (1) a common method is to measure wind speed with hot sphere anemometer and to measure wind speed with hot ball anemometer. The general thermo ball anemometer has high sensitivity but poor stability. Therefore, the drugstore should pay attention to the wind speed measured by Hot-bulb anemometer: check whether the appearance and working state of anemometer are normal; correct the zero position of anemometer before measuring; correct the zero position when the probe should be in the windless state; measure the wind speed of dust-free workshop when the windward side of the anemometer probe should be vertical to the wind direction; wait for the display to be stable. After reading, care should be taken to prevent the anemometer probe from touching other objects.
    空气净化工程
    (2)用旋翼式风速计测定风速。旋翼式风速计的转轴有一定的摩擦力,以是早期的旋翼式风速计的灵敏度较低,人们不太喜欢使用。随着 技术实现 的颈部,旋翼式风速计的灵敏度越来越高,使用旋翼式风速计的人也越来越多。
    (2) wind speed is determined by rotor anemometer. Rotor anemometers have friction on their spindles, so the sensitivity of early rotors is low and people don't like to use them very much. With the neck of technology, the sensitivity of rotorcraft anemometer is getting higher and higher, and more and more people use rotorcraft anemometer.
    使用旋翼式风速计测定风速应care一下要点:检查风速计外观和work状态是否正常;检查转轴摩擦力是否正常;测定风速时,应认清气流方向;旋翼的旋转平面应垂直于风向;旋翼应全部处于风道中;等待显示稳定下再开始读数。
    When measuring wind speed with rotorcraft anemometer, we should pay attention to the following points: checking whether the appearance and working state of the anemometer are normal; checking whether the friction force of the rotating shaft is normal; recognizing the direction of the air flow when measuring the wind speed; the rotorcraft's rotating plane should be vertical to the direction of the wind; the rotorcraft should be all in the wind channel; waiting for the display of stability before starting reading. Number.
    (3)用皮托管结合微压计测定风速。使用准则皮托管结合微压计测定静压和全压,按照静压和全压计算出动压,再按照动压计算出风速。
    (3) wind speed is measured with a pitot tube and a micro pressure gauge. The static pressure and total pressure were measured by standard pitot tube combined with micromanometer. The dynamic pressure was calculated by static pressure and total pressure, and then the wind speed was calculated by dynamic pressure.
    一般环境下,用准则皮托管测得的风速比较可靠。风洞中的准则风速就是使用准则皮托管结合微压计测定的。然则,这种测定方法的操作比较麻烦,而且对于微压计的灵敏和精确度。
    In general, the wind speed measured by standard pitot tube is more reliable. The standard wind speed in the wind tunnel is measured by the standard pitot tube combined with the micro pressure gauge. However, the operation of this method is rather troublesome, and it is sensitive and accurate to the micro pressure gauge.
    用皮托管测定无尘车间的风速时应care以下事项:检查准则皮托管的进气口是否有损伤;检查准则准则皮托管是否有堵塞现象;检查链接皮托管的管道是否通畅;检查微压表的显示是否正常;准则皮托管放置方向应准确。
    When measuring the wind speed of dust-free workshop with pitot tube, the following points should be noticed: check whether the inlet of standard pitot tube is damaged; check whether the standard pitot tube is blocked; check whether the pipeline connecting the pitot tube is unobstructed; check whether the display of micro-pressure gauge is normal; and the direction of the standard pitot tube should be accurate.
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