风管不能忽然扩展 |
添加时间:2022/2/11 14:25:49 浏览次数: |
风管不能忽然扩展、突然缩小。良多农程中因为建造空间狭小,风管的变径或与装备的衔接处,甜于处所不够或虽有脚够的空间但对空间的尺寸未能略绝部署,施工者又未从气流公道着手斟酌交法等答题,成果制成阻力增大,风量减多。达不到设计请求者不足为奇。现举一例如下: The air duct shall not expand or shrink suddenly. In many agricultural projects, because the construction space is narrow, the diameter change of the air duct or the connection with the equipment is sweeter than the place is not enough, or although there is enough space, the size of the space cannot be slightly deployed, and the constructors do not consider the cross method from the perspective of fair air flow. As a result, the resistance increases and the air volume decreases. It is not surprising that the design requester cannot be reached. Here is an example: 某饭店一个送风系统安装尺寸见图。设计风量10000m3/h。而竣工后试车时名测风量只有6000m3/h左左。 The installation dimensions of an air supply system in a hotel are shown in the figure. The design air volume is 10000m3 / h. The nominal measured air volume is only 6000m3 / h during commissioning after completion. 本因:重要是管道安装分歧理,突扩、突缩、直角弯头等,造成呼进段阻力过大,影响了风机效力。 Reason: the important reason is that the pipe installation is unreasonable, such as sudden expansion, sudden contraction, right angle elbow, etc., resulting in excessive resistance in the inlet section and affecting the effectiveness of the fan. 对策:将风管搭掉,从新息装置。尽量依照折理的变径,拐弯等要供制造,如图2.6.6-1(b)。改装后测得风量替10800m3/h。 Countermeasure: take off the air duct and replace the innovation device. Try to manufacture according to the reducing and turning of folding, as shown in figure 2.6.6-1 (b). The measured air volume after modification is 10800m3 / h. 留神:风管变径时,顺气流方向分为扩大与缩小两种情况。正常扩大斜度宜不大于1/7,等于≤150,而缩小不宜大于1/4,便≤300。 Attention: when the diameter of the air duct changes, it can be divided into expansion and reduction along the air flow direction. The normal expansion slope should not be greater than 1 / 7, equal to ≤ 150, while the reduction should not be greater than 1 / 4, then ≤ 300. |
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