柱塞阀振动和噪声

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原文：　　振动和噪声是同时出现的。它们不仅对机器的操作者造成危害，也对环境造成污染。　　(1)柱塞阀机械振动和噪声　　如阀轴和电机轴不同心或顶死，旋转轴的轴承、联轴节损伤，弹性垫破损和装配螺栓松动均会产生噪声。对于高速运转或传输大能量的阀，要定期检查，记录各部件的振幅、频率和噪声。如阀的转动频率与压力阀的固有频率相同时，将会引起共振，可改变阀的转速以消除共振。　　(2)柱塞阀管道内液流产生的噪声　　进油管道太细、进油滤油器通流能力过小或堵塞、进油管吸入空气、油液豁度过高、油面过低吸油不足和高压管道中产生液击等，均会产生噪声。因此，必须正确设计油箱，正确选择滤油器、油管和方向阀。

“The choice of valve diameter”是由中国闸阀网提供的阀门行业新闻，译文仅供参考。另外，中国闸阀网还提供相关产品搜索：电动闸阀、手动闸阀、气动闸阀、不锈钢闸阀、美标凸耳闸阀等。

译文：
The choice of valve diameter Should be based on the known fluid flow rate required to calculate the coefficient of CV, based on product data sheet and then select the appropriate valve diameter. Calculation of CV, we should pay attention to the liquid, gas, steam and other vapors difference. 2 installation of pneumatic control valve membrane Control valve installation should pay special attention to the following points. (1) The control valve should be installed vertically in horizontal pipelines, such as the level required in exceptional circumstances and tilt installation, usually to add support. (2) When the selected control valve nominal diameter and the diameter is not the same process, should be retrofitted with reducer fittings to connect. (3) The installation site should have a better environmental conditions, ambient temperature should be -25 ~ +55 ℃. (4) mounted on a vibration source to avoid the occasion, or shall take the necessary reinforcement of anti-vibration measures. (5) installation, you must make the valve or flange on the direction of the arrow point to the media. (6) installation, you need to carefully remove the pipe welding slag and other debris; in the installation, you should make the biggest opening in the valve, and piping and valves clean again, to prevent debris stuck and damage the section flow conditions. (7) pneumatic control valve should be installed in the ease of maintenance, repair location. (8) of straight pipe before the valve should be as long as possible. (9) exit piping applications 3 to 5 times the pipe diameter of straight pipe. (10) In order to ensure that the control valve and control system failure will not affect the production and security incidents, generally need to install the bypass and the bypass valve. Bypass valve can not be installed just above the valve, the bypass valve to prevent leakage of corrosive media to the regulating valve. Control valve before and after the cut-off valve must be installed for high-temperature, high pressure, easy to freeze, viscous media, but also install shower valve guide....

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原文来源：http://www.1zhafa.com/

2011-12-20 06:08