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军标式砂尘试验室的三种程序及测试合格判断


2025-02-20


军标式砂尘试验室测试的合格判定标准主要依据GJB 150.12A标准,通过评估设备在砂尘环境中的密封性、耐磨性和功能性来确定其是否合格。以下是具体的判定方法:

军标式砂尘试验室

一、测试前准备

在测试前,设备需在标准大气条件下进行全面检查,记录其初始状态,包括外观、密封性、功能性和电气性能。

二、军标式砂尘试验室包括三种程序:

1.吹尘试验:风速为1.5 m/s至8.9 m/s,浓度为10.6 g/m³,持续时间至少6小时。

2.吹砂试验:风速为18 m/s至29 m/s,浓度为0.18 g/m³至2.2 g/m³,每个易损面暴露时间至少90分钟。

3.降尘试验:沉降速率为6 g/m²/天,持续时间通常为3天。

三、测试后检查

1.测试完成后,需对设备进行全面检查,包括以下几个方面:

2.功能检查:设备在测试后需恢复到标准大气条件,进行全面功能检查,确保其仍能满足设计要求。

3.外观检查:检查设备表面是否有砂尘渗透、磨损或堵塞现象,特别关注密封区域、过滤器和通风口。

4.电气性能检查:对于电气设备,检查绝缘性能是否下降。

四、合格判定标准

1.军标式砂尘试验室在测试过程中和测试后需满足以下条件才可判定为合格:

2.无砂尘渗透:设备内部关键部件(如轴承、密封件、过滤器等)无砂尘渗透。

3.功能正常:设备在测试后仍能正常工作,无性能劣化。

4.无严重磨损或堵塞:设备表面无明显磨损,活动部件未因砂尘卡住或受阻碍。

5.无隔热效应导致的过热:设备未因砂尘积聚导致隔热效应而过热。

以上关于军标式砂尘试验室的三种程序及测试合格判断标准,先介绍到这里。

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