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原文：
  　　输出转矩值是电动装置的重要技术参数之一，也是使用中需要选择的重要参数。如果在组配电动阀门时选用的电动装置输出转矩过大或不足都是不可取的。因为一般情况，电动装置生产厂在产品出厂时均需进行输出转矩值的测试与调整，是相对比较准确的。如果选用过大的输出转矩余量，将会使电动阀门具有很大的潜在危险性，一旦发生控制保护失灵情况将很容易造成阀门损坏（阀杆弯曲、阀体破裂）现象，极易造成管道系统事故。所以输出转矩余量选择过大是不可取的。如果在实际工作中打不开阀门也是属于选择不合理。 　　关于对电动装置输出转速的确定，在阀门对其启闭时间没有严格要求时，应尽量选用较慢的速度。 　　因为不必要的较快速度，在相同转矩要求下将会增大电机功率，这样不但浪费能源，提高工程造价，而且也会使电动装置体积增大造成多方面浪费。 　　目前国内自行开发研制的电动装置，在每个机座号中设计配用的电动机规格数量不多（一般为2-3个规格），以及主体传动中齿轮副和蜗轮副的速比范围变化有限，所以每个机座号的转矩分档和转速分档都不多。

“At gas pipeline leak ”是由中国电动阀门网提供的阀门行业新闻，译文仅供参考。另外，中国电动阀门网还提供相关产品搜索： 电动球阀、 电动蝶阀 、电动闸阀、 电动截止阀、 电动隔膜阀 等。

译文：
At gas pipeline leak Yesterday morning, the hidden fairy Xianlin Qixia District North gas pipeline near a leak, but fortunately discovered in time to evacuate early, no casualties. Gas leak in the south of North Xianlin cents a hidden opening on the road is not, reporters rushed to the scene the morning, a few hundred meters away from the leak point where, Hong Kong and China Gas Company personnel to close the valve repair. About half an hour later, Hong Kong and China Gas Company personnel will repair the gas valve closed around a few, site alert lifted. Subsequently, the reporter went to the gas leak in the scene, saw in the street the slow lane of the road there are dozens of gas wells around the hole, the edge of three tents, tens of meters in the leak investigation outside a punch in the job . Soon the site of the official surnamed Shen went to Hong Kong and China Gas Company repair staff explained that the construction team is December 8 to this place, mainly along the Metro Line 4 is responsible for the geological exploration, and geological exploration point away from the gas leak points. The person in charge and asked if the gas company to check out is caused by gas leakage due to geological exploration, the site is certainly responsible for and bear the costs. According to Hong Kong and China Gas repair personnel, this gas pipeline about 50 millimeters in diameter, the pressure inside the tubes of 2.5 kg, since the gas leak is away from residential areas, but also the end of the pipeline, which has little effect.

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原文来源：http://www.1diandongfamen.com/

2011-12-15 08:32

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