裝載機(jī)柴油機(jī)功率下降的原因有哪些？
[ 發(fā)布日期：2023-01-07 15:10:28 ] 來源:永保機(jī)械 瀏覽：413次
裝載機(jī)發(fā)生柴油機(jī)功率下降的現(xiàn)象經(jīng)常發(fā)生，主要原因可能是柴油機(jī)制造質(zhì)量沒有達(dá)到設(shè)計標(biāo)準(zhǔn)，導(dǎo)致裝載機(jī)柴油機(jī)功率減弱。那么導(dǎo)致山東裝載機(jī)柴油機(jī)功率下降的原因主要有哪些呢？
1、裝載機(jī)中連桿軸頸回轉(zhuǎn)半徑或活塞銷至頂部尺寸不合適，裝載機(jī)柴油機(jī)功率變?nèi)酰瑢?dǎo)致運(yùn)行時活塞撞擊缸蓋，沖擊力直接作用于連桿小頭，使其工作不正常面斷裂。
Loader turning radius rod journal or piston pin to the top of the wrong size, loader diesel power becomes weak, leading to run the piston head impact, the impact force acting on the connecting rod head directly to the fracture surface is not working properly .
2、鑄造時的缺欠降低了缸體的剛度，發(fā)動機(jī)經(jīng)過大的熱負(fù)荷后產(chǎn)生產(chǎn)生永久變形。
Casting defect reduces the rigidity of the cylinder, the engine load after a large heat generating permanent deformation.
3、柴油機(jī)加工精確度差。由于整體變形量較大，造成連桿大頭在軸頸上靠一側(cè)并且無端隙、曲柄連桿機(jī)構(gòu)的中心與缸套中心不重合等，導(dǎo)致活塞偏磨，運(yùn)行后與缸壁的間隙增大而使氣缸壓縮力不足；連桿則因受力不良，小頭的一側(cè)受力較大，產(chǎn)生疲勞而斷裂破損。
Diesel machining accuracy is poor. Due to the large amount of overall deformation caused by the connecting rod journal on one side and unprovoked gap center and cylinder crank linkage centers do not coincide, leading to the piston side wear, running increases with the cylinder wall clearance leaving the cylinder compression force is insufficient; link is due to poor power, larger force head on one side, resulting in fatigue and fracture damage.
4、柴油機(jī)缸壁間隙過小、活塞裙部橢圓度太小，導(dǎo)致運(yùn)行時活塞膨脹，與缸套的摩擦力增大甚至咬死，致使連桿小頭受力超出設(shè)計應(yīng)力而斷裂。連桿大頭在軸頸上無端隙、曲軸軸向推力軸承軸向、間隙太小、連桿大小頭軸瓦中心線不平行等，造成活塞偏磨，連桿小頭受彎曲力的作用而斷裂?；钊c套的間隙不正確，無潤滑。
Diesel engine cylinder wall clearance is too small, too small piston skirt ellipse, resulting runtime piston expansion, and increased friction liner or even killed, resulting in a small head rod force beyond the design stress fracture. Connecting rod journal unwarranted gap in the crankshaft axial thrust bearing axial clearance is too small, the size of the connecting rod bearing head is not parallel to the centerline, resulting in partial wear piston, connecting rod head bent by the force and effect of the fracture. Clearance between the piston and the sleeve is not correct, no lubrication.
