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    通风管道标识风压计算方式介绍
    来源: 2018-08-29 16:12:41
    长距离掘进巷道通风时风筒进风口和出风口会有大的风量差和风压差。为了选择合理的风机通风,需要研究风筒中风量、风压的变化规律。常规方法是利用经验或实验得到风筒接头平均漏风量,从而计算进风口的风量和风压。但对于长距离通风且每段风筒较小时该方法所计算的参数偏小,会对风机选型造成误差。
    There will be large air volume difference and wind pressure difference between air inlet and outlet of ventilation duct when ventilation in long distance driving roadway. In order to select a reasonable fan ventilation, it is necessary to study the change rule of air volume and wind pressure in the ventilator. The conventional method is to use experience or experiment to get the average air leakage of the air tube joint, and then calculate the air volume and pressure of the air inlet. However, for long-distance ventilation and each section of the wind tube is small, the parameters calculated by this method are small, which will cause errors in fan selection.
    通风管道标识风压计算根据风量、风压平衡定律,按照非连续性通风网络模型推导出了进风口的风量、风压与出风口处的关系,并给出了简化的近似关系,作为风筒通风参数计算的新方法。
    According to the law of air volume and air pressure balance, the relationship between air volume and air pressure at inlet and outlet is deduced according to the non-continuous ventilation network model, and the simplified approximate relationship is given as a new method for calculating the ventilation parameters of air duct.

    结合具体实例,发现参数近似值与精确值高度相似,说明可以利用近似关系进行计算,简单方便;同时比较了按新方法和常规方法计算的风筒进风风量和通风阻力的差异,结果表明长距离掘进巷道的风量风压按新方法计算更为科学。

    Combining with the concrete example, it is found that the approximate value of parameters is similar to the exact value, which shows that the approximate relation can be used to calculate the air volume and the ventilation resistance of the air tube calculated by the new method and the conventional method is simple and convenient.
    通风机是量大面广的耗能设备,为了节省通风机能耗减少运行成本,当前应当重视通风空调系统优化技术,实现降低系统通风管道压降和节耗,合理匹配和优化运行调节。笔者从通风机售后服务现场发现,之前业主认定通风机质量问题,到通风机使用现场调查,结果有相当部分是通风系统设计、制造、安装不合理而导致通风机运行不正常,出现通风机性能达不到设计要求,振动噪声超标,叶片断裂等问题,通风系统经合理改造后,通风机运行正常了
    Fan is a large amount of energy-consuming equipment, in order to save energy consumption and reduce operating costs, we should pay attention to the optimization technology of ventilation and air-conditioning system to reduce the pressure drop and consumption of ventilation ducts, and to match and optimize the operation and regulation. From the fan after-sales service site, the author found that before the owner identified the fan quality problems, to the fan use site investigation, the results are quite a part of the ventilation system design, manufacture, installation unreasonable leading to the fan operation abnormal, fan performance can not meet the design requirements, vibration and noise exceed the standard, blades After the ventilation system has been properly retrofit, the fan is running normally.
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