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造成攪拌車發動機過早損壞的原因有哪些呢?

來源:http://www.pingqxw.com/ 日期:2020-05-19 發布人:zhongke
  一些司機報告說,他們和朋友買的同一臺攪拌器在使用一段時間后會出現引擎問題,但他們朋友的車的引擎沒問題。有什么事嗎?讓我們找出答案。
  Some drivers reported that the same blender they and their friends bought would have engine problems after a period of use, but the engine of their friend's car was OK. What's up? Let's find out.
  1. 攪拌車維護數據使用不當
  1. Improper use of mixer maintenance data
  攪拌車維修中未科學地選擇維修數據是造成機械零件早期損壞的重要原因之一。例如,閥門與閥座接觸面的寬度規定為進氣閥1-2.2mm,排氣閥1.5-2.5mm。但是,在實際的維護中,很多人認為寬一點總比窄一點好,所以他們習慣于選擇上限值或接近上限值,因為閥面寬度已經接近上限值。例如,閥門間隙,通用汽車提供0.2 - -0.25毫米,但在維護調整也認為有點大間隙比小一些,因此,在使用的上限,事實上,間隙太大,不僅降低發動機功率,還會出現敲門聲音和早期損壞。
  The unscientific selection of maintenance data is one of the important reasons for the early damage of mechanical parts. For example, the width of the valve seat contact surface is specified as intake valve 1- 2.2mm , vent valve One point five - 2.5mm 。 However, in the actual maintenance, many people think that a little wider is better than a little narrower, so they are used to choose the upper limit value or close to the upper limit value, because the valve face width is close to the upper limit value. For example, valve clearance, provided by General Motors zero point two -- zero point two five Mm, but in the maintenance adjustment, it is also considered that the clearance is a little larger than a little smaller. Therefore, in the upper limit of use, in fact, the clearance is too large, which not only reduces the engine power, but also causes knocking sound and early damage.
  2. 閥拋光
  2. Valve polishing
  維護的混合卡車,如果閥門消融,麻點和凹痕,應光滑磨削,一般在光滑的磨床,手術需要注意四個問題:,確保閥頭與桿同心,否則它應該變直;其次,在研磨出完整錐面的前提下,輕磨車盡可能的小。三是盡量提高表面光潔度;第四,閥桿下垂端應磨平。
  For the maintenance of the mixing truck, if the valve is melted, the pits and dents should be grinded smoothly. Generally, in the smooth grinder, four problems should be paid attention to during the operation: first, make sure that the valve head is concentric with the rod, otherwise it should be straightened; second, on the premise of grinding out the complete cone surface, the light grinding truck should be as small as possible. Third, try to improve the surface finish; fourth, the sagging end of the valve rod should be polished.
中科攪拌機
  3.閥門導軌鉸鏈銷
  3. Hinge pin of valve guide rail
  閥桿與閥管的匹配間隙是決定閥管使用壽命的關鍵。因此,更換新閥管時,鉸孔銷應嚴格控制配合間隙。每種混合車規定的間隙下限可以有效延長使用壽命。
  The matching clearance between the valve stem and the valve tube is the key to determine the service life of the valve tube. Therefore, when replacing the new valve pipe, the fit clearance of reaming pin should be strictly controlled. The specified lower clearance limit of each hybrid vehicle can effectively extend its service life.
  4. 閥研磨
  4. Valve grinding
  閥門研磨分為兩種情況:一種是只對閥門和閥座有輕微的點蝕,不需要光研磨和鉸銷研磨;二是閥門和閥座經過輕磨和鉸銷磨。前者先用純金鋼砂磨,將麻磨掉,再用細砂石磨,涂上油劑磨,直到密封符合要求,寬度符合規定。后者只有在密封達不到磨削的要求時,但必須注意操作,不能太用力,嚴禁上下敲擊閥門,否則會出現凹形砂痕,影響維修質量。
  Valve lapping can be divided into two situations: one is only slight pitting on the valve and valve seat, without light lapping and hinge pin lapping; the other is light lapping and hinge pin lapping on the valve and valve seat. The former is first ground with pure steel sand, then with fine sand stone, and finally with oil agent until the sealing meets the requirements and the width meets the requirements. In the latter case, only when the seal fails to meet the grinding requirements, the operator shall pay attention to the operation and not 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.
  自上料水泥攪拌車的故障并不可怕,但保養不正確,發動機的性能只會越來越差?;祛l器是負擔得起,現在是時候買它。
  The failure of the concrete mixer is not terrible, but the maintenance is not correct, and the performance of the engine will only get worse and worse. Mixers are affordable, and it's time to buy them.

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