使用小型混凝土攪拌車(chē)注意發(fā)動(dòng)機的損耗情況，小型混凝土攪拌車(chē)在經(jīng)過(guò)長(cháng)時(shí)間使用后，發(fā)動(dòng)機會(huì )出現一些狀況，可是小型混凝土攪拌車(chē)發(fā)動(dòng)機早期損壞原因都有什么呢，如和日常維護發(fā)動(dòng)機的消耗呢。我們一起來(lái)了解一下。

Pay attention to the engine loss when using a small mixer. After a long time of use, the engine of a small mixer will have some problems. But what are the causes of early engine damage of a small mixer, such as the consumption of the engine for daily maintenance. Let's get to know.

小型混凝土攪拌車(chē)在維修作業(yè)中突出的問(wèn)題是氣門(mén)與氣門(mén)座工作面加工質(zhì)量達不到要求，造成工作面燒蝕、凹陷而早期損壞；凸輪軸軸承在刮削中其配合間隙、接觸面積、各軸承同心度達不到要求，加速磨損，出現異響造成早期損壞；氣門(mén)導管在更換新零件時(shí)，鉸削質(zhì)量如果達不到規定的要求，將會(huì )直接影響氣門(mén)及氣門(mén)座使用壽命。

The prominent problem of small concrete mixer in maintenance operation is that the machining quality of valve and valve seat working face cannot meet the requirements, resulting in ablation, depression and early damage of the working face; During the scraping of camshaft bearing, its fit clearance, contact area and concentricity of each bearing fail to meet the requirements, which accelerates the wear and causes early damage due to abnormal noise; When the valve guide is replaced with new parts, if the reaming quality fails to meet the specified requirements, the service life of the valve and valve seat will be directly affected.

小型混凝土攪拌車(chē)的凸輪軸軸承的刮削屬于手工作業(yè)，保證質(zhì)量有一定難度。為刮削方便，又通常在氣缸體外加工，因此應特別注意四個(gè)問(wèn)題：一是要確定好軸承刮削后內孔的直徑（用公式表述為：內孔直徑=軸頸直徑實(shí)測值+配合間隙下限值+軸承與座孔過(guò)盈量實(shí)測值）；二是刮削中要盡量注意保持軸承內孔與外圓的同軸度；

The scraping of camshaft bearing of small concrete mixer belongs to manual operation, so it is difficult to ensure the quality. In order to facilitate scraping and generally process outside the cylinder, four problems should be paid special attention to: first, determine the diameter of the bearing inner hole after scraping (expressed by the formula: inner hole diameter=measured value of journal diameter+lower limit of fit clearance+measured value of interference between bearing and seat hole); Second, pay attention to keeping the coaxiality of bearing inner hole and outer circle as much as possible during scraping;

氣門(mén)的研磨分為兩種情況，一是氣門(mén)與座只有輕微麻點(diǎn)，不需要光磨和鉸削時(shí)的研磨；二是氣門(mén)與座均已經(jīng)過(guò)光磨和鉸削后的研磨。前者先用租金剛砂研磨，將麻點(diǎn)研磨掉后，再用細金剛砂研磨，然后涂上機油研磨，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。

The grinding of the valve can be divided into two cases: one is that the valve and seat have only slight pitting, so the grinding of smooth grinding and reaming is not required; Second, the valve and seat have been polished and reamed. The former is first ground with emery, after the pitting is removed, it is then ground with fine emery, and then coated with oil for grinding until the sealing meets the requirements and the width meets the requirements. The latter shall be grinded only when the sealing performance fails to meet the requirements. However, care must be taken during operation to avoid excessive force. It is strictly prohibited to knock the valve up and down, or concave sand marks will appear, which will affect the maintenance quality.

小型混凝土攪拌車(chē)發(fā)動(dòng)機早期損壞原因就是以上所講的內容了，您對此有什么相關(guān)的問(wèn)題要咨詢(xún)，可以隨時(shí)來(lái)我們網(wǎng)站http://www.jqeq.cn進(jìn)行了解聯(lián)系！

The reason for the early damage of the engine of small concrete mixer is the above content. If you have any questions about this, you can come to our website at any time http://www.jqeq.cn Get to know!