在現(xiàn)代工業(yè)的連續(xù)生產(chǎn)中，柴油發(fā)電機(jī)由于受工作溫度、壓力、震動(dòng)等因素的影響，不可避免的出現(xiàn)滲漏問(wèn)題。通常解決滲漏的傳統(tǒng)方法是打卡具或焊補(bǔ)等工藝，但具有較大的局限性，且有的滲漏受工作環(huán)境安全的要求限制，無(wú)法現(xiàn)場(chǎng)進(jìn)行解決。目前針對(duì)柴油發(fā)電機(jī)滲漏最新解決方案是采用高分子復(fù)合材料的方法，用高分子材料修復(fù)柴油發(fā)電機(jī)是現(xiàn)場(chǎng)堵漏一個(gè)理想方法，特別是在易燃易爆場(chǎng)合下及不停車帶壓堵漏方面均顯示其獨(dú)有的優(yōu)越性。不僅可以停車堵漏、密封，而且可以在不影響生產(chǎn)進(jìn)行的前提下在線待機(jī)治理滲漏部位，達(dá)到重新密封的目的，經(jīng)濟(jì)效益顯著。

高分子材料治理柴油發(fā)電機(jī)組滲漏

發(fā)電機(jī)組電機(jī)受潮以后，必須及時(shí)進(jìn)行烘干處理，根據(jù)電機(jī)的容量大小和受潮程度，常用的烘干方法有以下兩種：

在有條件的地方，將電機(jī)整體(最好把定子和轉(zhuǎn)于拆開)放到烘箱(爐)中逐漸升溫烘烤．烘箱(爐)應(yīng)能通風(fēng)．以便帶走電機(jī)內(nèi)的潮氣，并且最好是夾層的，里層放電機(jī)，在外層加熱．里層的溫度保持在90一100°C，而且不能有明火、煙塵以及其他可燃性和腐蝕性氣體存在。一般要求連續(xù)烘烤8～18h，中間可測(cè)量幾次電機(jī)的絕緣電阻值，直至達(dá)到規(guī)定值并且穩(wěn)定為止。

交流后，在出線盒內(nèi)將三相短接，然后使發(fā)電機(jī)轉(zhuǎn)速上升到暫定轉(zhuǎn)速，保持不變，再調(diào)節(jié)勵(lì)磁電流，先使定子短路電流達(dá)到額定電流的50%～70%，保持4～5h，然后再增加勵(lì)磁電流，使短路電流達(dá)到額定值的80%一100%，使線圈溫度保持在85℃以下，每隔30min測(cè)量一次線圈的絕緣電阻和溫度，直到絕緣電阻達(dá)到規(guī)定值井穩(wěn)定為止。

發(fā)電機(jī)在進(jìn)行就地干燥時(shí)，一定要做好必要的保溫和現(xiàn)場(chǎng)安全措施，具體措施如下：

干燥時(shí)，發(fā)電機(jī)各處的溫度限額為：

另外，在干燥過(guò)程中、要定時(shí)記錄絕緣電阻、繞組溫度、排出空氣溫度、鐵芯溫度的數(shù)值，并繪制出定子溫度和絕緣電阻的變化曲線，受潮繞組在干燥初期，由于潮氣蒸發(fā)的影響，絕緣電阻明顯下降，隨著干燥時(shí)間的增加，絕緣電阻便逐漸升高，最后在一定溫度下，穩(wěn)定在一定數(shù)值不變。若溫度不變，且再經(jīng)3～5 小時(shí)后絕緣電阻及吸收比也不變。用搖表測(cè)量轉(zhuǎn)子的絕緣電阻大于1MΩ時(shí)，則可認(rèn)為干燥工作結(jié)束。

In the continuous production of modern industry, diesel generators are inevitably affected by factors such as working temperature, pressure, and vibration, resulting in leakage problems. The traditional methods for solving leakage are usually using fixtures or welding repair processes, but they have significant limitations, and some leaks are limited by the requirements of work environment safety and cannot be solved on site. The latest solution for diesel generator leakage is to use polymer composite materials. Repairing diesel generators with polymer materials is an ideal method for on-site leak prevention, especially in flammable and explosive environments and non-stop pressurized leak prevention, demonstrating its unique advantages. Not only can it be stopped for plugging and sealing, but it can also be used for online standby treatment of leakage areas without affecting production, achieving the goal of resealing, with significant economic benefits.

Polymer material treatment of diesel generator leakage

After the generator set motor is affected by moisture, it must be dried in a timely manner. According to the capacity and degree of moisture of the motor, there are two commonly used drying methods:

In places where conditions permit, place the motor as a whole (preferably with the stator and rotor separated) in an oven (furnace) and gradually heat it up for baking. The oven (furnace) should be ventilated to remove moisture from the motor, and it is best to have a sandwich structure with the motor placed in the inner layer and heated on the outer layer. The temperature of the inner layer should be maintained at 90-100 ° C, and there should be no open flames, smoke, or other flammable and corrosive gases present. Generally, it is required to bake continuously for 8-18 hours, during which the insulation resistance value of the motor can be measured several times until it reaches the specified value and stabilizes.

After communication, short-circuit the three-phase in the output box, then increase the generator speed to the temporary speed and maintain it constant. Adjust the excitation current, first make the stator short-circuit current reach 50% to 70% of the rated current, maintain it for 4-5 hours, and then increase the excitation current to make the short-circuit current reach 80% to 100% of the rated value. Keep the coil temperature below 85 ℃, measure the insulation resistance and temperature of the coil every 30 minutes until the insulation resistance reaches the specified value and stabilizes.

When the generator is dried on site, necessary insulation and on-site safety measures must be taken. The specific measures are as follows:

When dry, the temperature limit at various locations of the generator is:

In addition, during the drying process, it is necessary to regularly record the values of insulation resistance, winding temperature, exhaust air temperature, and iron core temperature, and draw the change curves of stator temperature and insulation resistance. In the early stage of drying, the insulation resistance of damp windings decreases significantly due to the influence of moisture evaporation. As the drying time increases, the insulation resistance gradually increases, and finally stabilizes at a certain value at a certain temperature. If the temperature remains constant, and after another 3-5 hours, the insulation resistance and absorption ratio also remain unchanged. When the insulation resistance of the rotor measured with a shaking table is greater than 1M Ω, it can be considered that the drying work is completed.