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硅橡胶彩电高压帽 众所周知,电视机显象管的阳极电压高达数千至二、三万伏,且显象管屏幕尺寸越大,阳极电压越高。这一高压是由行输出变压器(俗称高压包)产生,并通过高压导线和高压帽与显象管阳极相接,以保证高压高频电流的稳定传输。 高压帽是高压包上的重要元件。它的作用是确保阳极弹簧与显象管阳极能良好接触,同时防止高压高频电流在不良环境下对机内其他部件的干扰与破坏,保证人、机安全。 目前,国产电视(尤其彩电)所用高压帽大部分是以三元乙丙胶为原料制成的,原料是一种饱和型高分子化合物。由这种原料制成的高压帽密封性差、容易老化、耐高、低温性能欠佳、且容易破裂。使用寿命一般仅2～3年。 高压帽破裂会使阳极弹簧氧化、高压接触不良,轻则
As we all know, the TV picture tube of the anode voltage as high as thousands to two, thirty thousand volts, and the greater the size of the screen tube, the anode voltage is higher. This high voltage is generated by the line output transformer (commonly known as high voltage package), and through the high voltage wire and high voltage cap and cathode of the kinescope to ensure the stable transmission of high voltage and high frequency current. High-pressure cap is an important component of the high pressure bag. Its role is to ensure good contact anode anode and cathode tube, while preventing high-voltage high-frequency current in adverse circumstances on the other parts of the machine interference and damage, guarantee people, machine safety. At present, most domestically used high-pressure caps for television (especially color TV) are made of EPDM as raw material, and the raw material is a saturated type polymer compound. The high-pressure cap made from this material is poor in sealing, easy to age, high in resistance, poor in low temperature performance and easily broken. The service life is generally only 2 to 3 years. High pressure cap rupture will make the anode spring oxidation, high pressure poor contact, ranging from light