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常見問題

小型攪拌車發動機為什么會出現損壞?

作者:http://www.jnxycwy.com 時間:2021-02-03

1.小型攪拌車的維護數據使用不當:在小型攪拌車的維護中未能科學地選擇維護數據是造成零件過早損壞的重要原因。例如,對于進氣門,氣門與氣門座之間的接觸表面的寬度被規定為1-2.2mm,對于排氣門,規定為1.5-2.5mm。但是,在實際維護中,許多人認為寬而不是窄更好,通常選擇上限或接近上限。上限,因為新修理的汽車的閥門工作表面的寬度已經接近使用極限。另一個示例是氣門座間隙,通常將其指定為車輛的0.2-0.25mm。然而,在維護調整中,還應考慮到間隙大于小于間隙。因此,如果間隙超過上限,則間隙實際上過大,這不僅會降低發動機功率,而且還會由于撞擊而導致早期損壞。
1. Improper use of maintenance data of small mixer: failure to select maintenance data scientifically in the maintenance of small mixer is an important reason for premature damage of parts. For example, the width of the contact surface between the valve and the valve seat is specified as 1-2.2mm for the intake valve and 1.5-2.5mm for the exhaust valve. However, in the actual maintenance, many people think that it is better to be wide than narrow, and usually choose the upper limit or close to the upper limit. Because the width of the valve working surface of the newly repaired car is close to the service limit. Another example is the valve seat clearance, which is usually specified as 0.2-0.25mm of the vehicle. However, in the maintenance adjustment, the clearance greater than or less than the clearance should also be considered. Therefore, if the clearance exceeds the upper limit, the clearance is actually too large, which will not only reduce the engine power, but also cause early damage due to impact.
2.閥門的平滑打磨:在小型攪拌車的維護中,如果閥門被燒蝕,凹坑或凹陷,則應將其打磨,通常是在光滑的研磨機上進行。在操作過程中需要注意四個問題:確保閥頭與閥桿同心,否則應先將其拉直;第二點是,如果可以磨出完整的圓錐體,則平滑的轎廂應盡可能小。第三是盡可能提高表面光潔度。第四是閥桿的末端是凹進的,應接地。
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2. Smooth grinding of valve: in the maintenance of small mixer, if the valve is ablated, dented or sunken, it should be polished, usually on a smooth grinder. In the process of operation, we need to pay attention to four problems: ensure that the valve head is concentric with the valve stem, otherwise it should be straightened first; the second point is that if the complete cone can be ground out, the smooth car should be as small as possible. The third is to improve the surface finish as much as possible. Fourth, the end of the stem is concave and should be grounded.
3.氣門導管的鉸鏈銷:氣門桿和氣門導管之間的間隙是確定氣門導管使用壽命的關鍵。因此,在更換新的氣門導管時,應嚴格控制鉸鏈銷的間隙,并應使用每種小型攪拌車型號規定的間隙。可以有效地延長使用壽命。
3. Hinge pin of valve guide: the clearance between valve stem and valve guide is the key to determine the service life of valve guide. Therefore, when replacing the new valve guide, the clearance of hinge pin should be strictly controlled, and the clearance specified by each small mixer model number should be used. It can effectively prolong the service life.
4.閥的磨削:閥的磨削分為兩種情況:一種是閥和閥座僅有輕微的點蝕,而無需磨削和鉸鏈銷磨削。另一個是閥和閥座都經過拋光和鉸鏈銷釘。研磨后,前者先用純金鋼砂磨碎,然后將凹坑磨掉,再用細金剛砂研磨,最后涂上機油進行研磨,直到密封達到要求,寬度達到要求。后者僅在密封不符合要求時才接地,但在操作過程中必須小心,不要用力過大,嚴禁上下敲打閥門,否則會出現凹形的砂痕,這會影響維護質量。
4. Grinding of valve: grinding of valve can be divided into two cases: one is that there is only slight pitting corrosion on valve and valve seat, and there is no need for grinding and hinge pin grinding. The other is that the valve and seat are polished and hinged. After grinding, the former is first ground with pure steel sand, then the pits are ground off, then ground with fine emery, and finally coated with engine oil for grinding until the seal meets the requirements and the width meets the requirements. The latter is only grounded when the seal does not meet the requirements, but in the process of operation, care must be taken not to use too much force. It is strictly forbidden to knock the valve up and down, otherwise concave sand marks will appear, which will affect the maintenance quality.
混凝土攪拌車發動機發生故障并不可怕。可怕的是,維修不正確,發動機的性能只會變差。小型攪拌車價格適中,現在就購買。
Concrete mixer engine failure is not terrible. The terrible thing is that if the maintenance is not correct, the performance of the engine will only deteriorate. The price of small mixer is moderate. Buy it now.
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