砂尘试验箱的砂尘密度测量

应助达人

你可以找一下砂尘试验箱的产品标准，一般会给出其检测方法，有的产品还有专门的检验方法标准。

找了些国标和军标,
谢谢版主支持

应助达人

如是电子的国标和军标的话可以上传，供版式友学习。

两个军标.希望有用

多谢楼主分享。

根据楼主分享的GJB的封面上的英文“sand and dust test”上网看看, 偶然发现GJB 150.12A-2009中之7.2.1与美国军标MIL-STD几乎一样:

BLOWING DUST: MIL-STD 810F - Method 510.4.Para 4.2.2 Procedure I

· Step 1. With the test item in the chamber, adjust the test section temperature to standard ambient conditions and the air velocity to the required value, determined from the test plan. Adjust the test section relative humidity to less than 30% and maintain it throughout the test.

· Step 2. Adjust the dust feed control for a dust concentration of 10 ±7 g/m3.

· Step 3. Unless otherwise specified, maintain the conditions of Steps 1 and 2 for at least 6 hours. If required, periodically reorient the test item to expose other vulnerable faces to the dust stream.

· Step 4. Stop the dust feed. Reduce the test section air velocity to approximately 1.5 m/s and adjust the temperature to standard ambient conditions or as otherwise determined from the test plan.

· Step 5. Maintain the step 4 conditions for 1 hour following test temperature stabilization.

· Step 6. Adjust the air velocity to that used in Step 1 and restart the dust feed to maintain the Dust concentration as in Step 2.

· Step 7. Continue the exposure for at least 6 hours or as otherwise specified. If required, operate the test item in accordance with the test plan.

· Step 8. Allow the test item to return to standard ambient conditions, and the dust to settle.

· Step 9. Remove accumulated dust from the test item by brushing, wiping or shaking, taking care to avoid introduction of additional dust or disturbing any which may have already entered the test item. Do not remove dust by either air blast or vacuum cleaning unless these methods are likely to be used in service.

· Step 10. Perform an operational check in accordance with the approved test plan, and document the results for comparison with pretest data.

· Step 11. Inspect the test item for dust penetration, giving special attention to bearings, grease seals, lubricants, filters, ventilation points, etc. Document the results.

楼主不怕被指为特务吗?

= = = = = =

多年前买了一本书, 封底印着 (内部发行), 结果在出境时被海关没收了。若当时行李中有一本军标, 恐怕会被抓起来了。

中国三十年来变化真大。

应助达人

是哦！想当初是多么的被愚昧无知！

poorlittle(poorlittle) 发表:楼主不怕被指为特务吗?

= = = = = =

多年前买了一本书, 封底印着 (内部发行), 结果在出境时被海关没收了。若当时行李中有一本军标, 恐怕会被抓起来了。

中国三十年来变化真大。