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2021-09-02

關(guān)于山汽

聯(lián)系人：劉老師

電話(huà)：400-879-1999

公司：山東山汽工程機械（集團）有限公司

地址：山東省萊州市206國道與308省道交叉口東南50米

全自動(dòng)上料攪拌車(chē)發(fā)動(dòng)機早期損壞的原因有哪些？

所屬分類(lèi)：行業(yè)資訊發(fā)布時(shí)間：2022-03-23 來(lái)源：http://www.akware.net/ 瀏覽量：0

1、全自動(dòng)上料攪拌車(chē)的維修數據應用不當在自上料攪拌車(chē)維修中不能科學(xué)的選擇維修數據是造成機件早期損壞的重要原因，比如氣門(mén)與氣門(mén)座接觸面的寬度，規定進(jìn)氣門(mén)為1-2.2mm，排氣門(mén)為1.5-2.5mm，但在實(shí)際維修當中，很多人認為寬一點(diǎn)比窄一點(diǎn)要好，習慣選用上限或接近上限值，因為剛修好的車(chē)氣門(mén)工作面寬度就已經(jīng)接近使用限度了，再比如氣門(mén)腳間隙，一般車(chē)輛規定為0.2-0.25mm，但在維護調整中也會(huì )認為間隙大一點(diǎn)比小一點(diǎn)好，因此，超上限使用，實(shí)際上間隙過(guò)大，不但降低發(fā)動(dòng)機功率，還會(huì )出現敲擊聲而早期損壞。

1. Improper application of the maintenance data of the fully automatic charging mixer is an important reason for the early damage of the machine parts. For example, the width of the contact surface between the valve and the valve seat is 1-2.2mm, and the exhaust valve is 1.5-2.5mm. However, in the actual maintenance, many people think that a wider one is better than a narrower one, and are used to selecting the upper limit or close to the upper limit, Because the width of the valve working surface of the newly repaired vehicle is close to the use limit. For example, the valve foot clearance is generally 0.2-0.25mm, but it will also be considered that a larger clearance is better than a smaller clearance in maintenance and adjustment. Therefore, if it is used beyond the upper limit, in fact, the clearance is too large, which will not only reduce the engine power, but also cause knocking sound and early damage.

2、全自動(dòng)上料攪拌車(chē)氣門(mén)的光磨在自上料攪拌車(chē)的維修中，如果氣門(mén)出現燒蝕、麻點(diǎn)及凹陷時(shí)，均應進(jìn)行光磨，一般是在光磨機上進(jìn)行，作業(yè)時(shí)需要注意四個(gè)問(wèn)題：一是保證氣門(mén)頭與桿部同心，否則應先校直。二是光磨輛在能磨出完整的錐面的前提下是越小越好。三是盡量提高表面光潔度。四是氣門(mén)桿端部凹陷應予以磨平。

2. The smooth grinding of the valve of the full-automatic feeding mixer truck in the maintenance of the self feeding mixer truck, if the valve appears ablation, pitting and depression, it should be polished, which is generally carried out on the smooth mill. Four problems need to be paid attention to during operation: first, ensure that the valve head is concentric with the rod, otherwise it should be straightened first. Second, on the premise that the smooth grinding vehicle can grind a complete cone, the smaller the better. Third, try to improve the surface finish. Fourth, the depression at the end of the valve stem should be ground flat.

3、全自動(dòng)上料攪拌車(chē)氣門(mén)導管的鉸銷(xiāo)氣門(mén)桿與氣門(mén)導管配合間隙是決定氣門(mén)導管使用壽命的關(guān)鍵。因此當更換氣門(mén)導管時(shí)，鉸銷(xiāo)時(shí)應嚴格掌握好配合間隙，使用各攪拌車(chē)車(chē)型規定間隙的下限，延長(cháng)使用壽命。

3. The fit clearance between the hinge pin valve stem and the valve guide of the valve guide of the automatic feeding mixer is the key to determine the service life of the valve guide. Therefore, when replacing the valve guide, the matching clearance should be strictly controlled during hinge pin, and the lower limit of the clearance specified by each mixer model should be used to prolong the service life.

4、全自動(dòng)上料攪拌車(chē)氣門(mén)的研磨自上料攪拌車(chē)氣門(mén)的研磨分為兩種情況：一是氣門(mén)與氣門(mén)座只有輕微麻點(diǎn)，不需要光磨和鉸銷(xiāo)時(shí)的研磨。二是氣門(mén)與氣門(mén)座均經(jīng)過(guò)光磨和鉸銷(xiāo)后的研磨，前者先用足金鋼砂研磨，將麻點(diǎn)研磨掉后，再用細金剛砂研磨，后涂上機油研磨，直密封符合要求，寬度符合規定為止，后者只有密封性達不到要求時(shí)才進(jìn)行研磨，但操作時(shí)一定要注意，不要過(guò)分用力，嚴禁將氣門(mén)上下敲打，否則將出現凹形砂痕，影響維修質(zhì)量。

4. The grinding of the valve of the fully automatic feeding mixer can be divided into two situations: one is that there are only slight pits between the valve and the valve seat, and there is no need for light grinding and grinding during hinge pin. Second, the valve and valve seat are ground after smooth grinding and hinge pin. The former is ground with full gold steel sand, the pitting is ground off, then ground with fine emery, and then coated with oil for grinding until the sealing meets the requirements and the width meets the regulations. The latter is ground only when the sealing fails to meet the requirements, but it must be noted during operation that excessive force is not allowed to knock the valve up and down, otherwise concave sand marks will appear, Affect the maintenance quality.

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The above is a detailed introduction to the automatic concrete mixer. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service http://www.akware.net

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