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自動上料攪拌車發動機損壞的原因
來源:http://www.wtiqradio.com發布日期:2022-05-09   瀏覽量:
 
自動上料攪拌車在使用一段時間之后,會出現一些問題,下面為大家介紹一下自動上料攪拌車發動機損壞的原因。
There will be some problems after the automatic feeding mixer is used for a period of time. Here is the reason for the damage of the engine of the automatic feeding mixer.
1、氣門腳空地的調整:配氣安排各機件在正常運用中,跟著零件的磨損,氣門腳空地將發生改動。如凸輪、氣門桿端面及挺桿接觸面磨損后空地將變大,而氣門頭與氣門座磨損后空地又變小,因此,在調整中應取空地的基地值為宜。如規矩為0.2~0.25mm,可實取0.22mm,這么既照顧了空地改動的實際情況,又思考了測量誤差疑問,可充沛保證氣門腳空地效果的完成。
1. Adjustment of valve foot clearance: during normal operation of various parts of the valve arrangement, the valve foot clearance will be changed with the wear of parts. For example, the open space will become larger after the wear of cam, valve stem end face and tappet contact surface, and the open space will become smaller after the wear of valve head and valve seat. Therefore, the base value of the open space should be taken in the adjustment. If the rule is 0.2 ~ 0.25mm, it can be taken as 0.22mm. This not only takes into account the actual situation of open space change, but also considers the question of measurement error, which can fully ensure the completion of open space effect of valve foot.
自動上料攪拌車
Automatic feeding mixer
2、氣門座的鉸削:氣門座鉸削通常為手作業業,應格外重視三個疑問:一是在凹陷、斑駁,能鉸出無缺錐面的基礎上,鉸削量越小越好;二是鉸削時用力要均勻,起刀收刀要輕,少鉸多調查,以保證較少的鉸削量和較高的光潔度;三是與氣門試配,判定好作業面方位和寬度。方位應調整到氣門錐面的中下部,偏上或偏下可用上、下口鉸刀進行調整。作業面寬度,進氣門可掌握在0.9mm(規矩為1~2.2mm),排氣門可掌握在1.4mm(規矩為1.5~2.5mm)。實踐證明上述寬度在氣門與氣門座研磨后,進氣門可達1mm,排氣門可達1.5mm,均在規矩寬度的下限,能大大提高其運用壽數。
2. Valve seat reaming: valve seat reaming is usually manual operation, so we should pay special attention to three questions: first, on the basis of depression, mottled and no missing cone, the smaller the reaming amount, the better; Second, the force during reaming should be uniform, the starting and closing of the knife should be light, less reaming and more investigation, so as to ensure less reaming amount and higher finish; Third, trial fit with the valve to determine the orientation and width of the working surface. The orientation shall be adjusted to the middle and lower part of the valve cone, and the upper and lower reamers can be used to adjust it up or down. For the width of the working surface, the inlet valve can be controlled at 0.9mm (the rule is 1 ~ 2.2mm), and the exhaust valve can be controlled at 1.4mm (the rule is 1.5 ~ 2.5mm). Practice has proved that after grinding the valve and valve seat, the inlet valve can reach 1mm and the exhaust valve can reach 1.5mm, both of which are at the lower limit of the regular width, which can greatly improve its service life.
3、自動上料攪拌車修補質量差在修補作業中的疑問是氣門與氣門座作業面加工質量達不到懇求,構成作業面燒蝕、凹陷而前期損壞;凸輪軸軸承在刮削中其協作空地、接觸面積、各軸承同心度達不到懇求,加速磨損,呈現異響構成前期損壞;氣門導管在更件時,鉸削質量達不到規矩懇求,直接影響氣門及氣門座運用壽數。
3. The repair quality of automatic feeding mixer truck is poor. The doubt in the repair operation is that the processing quality of the working surface of valve and valve seat can not meet the requirements, which constitutes the ablation and depression of the working surface and early damage; During the scraping of camshaft bearing, its cooperation space, contact area and concentricity of each bearing can not meet the requirements, which accelerates the wear, presents abnormal noise and constitutes early damage; When the valve guide is replaced, the reaming quality can not meet the requirements, which directly affects the service life of the valve and valve seat.

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