燃氣發電機組曲軸的光磨加工情況，是保證修復質量的關鍵工序之一。那么燃氣發電機組曲軸的光磨加工是怎樣的內容呢？下面來講解一番吧。

The smooth grinding of the crankshaft of gas generator set is one of the key processes to ensure the repair quality. So what is the content of light grinding of gas generator crankshaft? Now let's explain it.

以正時齒輪軸頸和飛輪突緣的外圓表面作為光磨裝膏基準時，須先校正彎曲度再進行磨削，磨前中間主軸頸的擺差不得大于o．3毫米。如果不預先校正彎曲，織削以后將會使曲軸產生與原來飛輪突緣和正時齒輪軸線交叉的新軸線，改變了回轉半徑，破壞了動平衡力，縮短使用壽命，加劇有關零件的磨耗，正時齒輪的響聲也大，后油封漏汕，增加了發動機的不平衡旋轉質量。

When taking the cylindrical surface of the timing gear journal and flywheel flange as the reference for smooth grinding paste loading, the curvature must be corrected before grinding. The runout of the middle main journal before grinding shall not be greater than 0.3 mm. If the bending is not corrected in advance, the crankshaft will produce a new axis crossing the original flywheel flange and the axis of the timing gear after weaving, which will change the turning radius, destroy the dynamic balance force, shorten the service life, aggravate the wear of relevant parts, make the timing gear sound loud, and the rear oil seal leaks, increasing the unbalanced rotation quality of the engine.

有資料統計，圓角半徑小于2，5毫米，其疲勞強度只及圓角半徑為2．5毫米的80％以下。由于對光磨曲軸的砂輪，經常用磨床附屬的砂輪圓角校正器修整，使磨得圓角尺寸符合要求，所以自振動堆焊投產以來，沒有發生過斷軸現象。

According to statistics, if the fillet radius is less than 2 or 5 mm, its fatigue strength is only less than 80% of that of 2.5 mm. Since the grinding wheel for smooth grinding of crankshaft is often trimmed with the grinding wheel fillet corrector attached to the grinder to make the rounded corner size meet the requirements, there has been no shaft fracture since the vibration surfacing was put into production.

燃氣發電機組在工作中，曲軸由于受力和工作條件復雜，各摩擦表面滑動速度很高，散熱條件又差，因此，曲軸的主軸頸和連桿軸頸在工作中不可避免地要產生磨損，而且磨損是不均勻的，其主要表現為軸頸出現圓度，圓柱度超過標準值和拉傷。

In the work of gas generator set, due to the complex stress and working conditions of the crankshaft, the sliding speed of each friction surface is very high, and the heat dissipation conditions are poor. Therefore, the main journal and connecting rod journal of the crankshaft will inevitably be worn in the work, and the wear is uneven, which is mainly manifested in the roundness of the journal, the cylindricity exceeding the standard value and the strain.

連桿軸頸磨損的大部位，一般在各軸頸的內側面上，即靠曲軸線一側，使軸頸失圓；而磨損成錐形的部位，一般在潤滑油道雜質附著的一側和受力大的部位上。

The large part of the wear of the connecting rod journal is generally on the inner side of each journal, that is, the side close to the centerline of the crankshaft, so that the journal is out of round; The parts worn into a cone are generally on the side where the impurities in the lubricating oil passage adhere and on the parts with large stress.

曲軸主軸頸的磨損部位，按發動機的強化程度、氣缸數、曲軸長度和平衡塊的配重不同而各異,而且相對于連桿軸頸磨損要均勻些。實踐表明,連桿軸頸的磨損比主軸頸磨損要快，但是，主軸頸磨損比連桿軸頸磨損所造成的后果要嚴重。

The wear parts of the crankshaft main journal vary according to the strengthening degree of the engine, the number of cylinders, the length of the crankshaft and the counterweight of the balance weight, and the wear is more uniform relative to the connecting rod journal. Practice shows that the wear of the connecting rod journal is faster than that of the main journal, but the wear of the main journal is more serious than that of the connecting rod journal.

燃氣發電機組檢驗與處理方法。根據各軸頸磨損規律查找出磨損部位,可用外徑測微器測量其圓度和圓柱度以便確定曲軸的修理級別和磨削尺寸。

Inspection and treatment methods of gas generator set. Find out the worn parts according to the wear law of each journal, and use the outside diameter micrometer to measure its roundness and cylindricity, so as to determine the repair level and grinding size of the crankshaft.

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