1、原因分析

1. Cause analysis

部分3t型装载机在工作500~1000h后，多次出现起升缸胶管轻度渗油现象。分析认为，造成胶管损坏的原因通常有以下4点：

Some 3T loaders work for 500 ~ 1000h, and there is slight oil leakage in the lifting cylinder hose for many times. According to the analysis, there are four reasons for the damage

一是设计不合理。如果胶管设计时，胶管安装的长度余量小于5％，容易将胶管接头拉出。如果设计的胶管走向不合理，会造成胶管与胶管或胶管与机体容易发生磨擦，从而导致胶管外皮破裂。

First, the design is unreasonable. If the length allowance of hose installation is less than 5% during hose design, it is easy to pull out the hose joint. If the direction of the designed hose is not reasonable, it will cause friction between the hose and the hose or between the hose and the body, resulting in the rupture of the hose skin.

二是装配不当。胶管接头安装过松或过紧，都会造成接头泄漏。安装时，胶管扭曲大于30°、胶管弯曲半径过小，均可使胶管使用寿命降低。

Second, improper assembly. If the hose joint is installed too loosely or too tightly, the joint will leak. When the hose is installed, the service life of the hose can be reduced if the hose is twisted more than 30 ° and the bending radius is too small.

三是使用环境恶劣。如液压油温度过高，不仅可导致胶管承压能力降低，引起接头漏油，还会加快胶管老化速度，使其使用寿命缩短。

Third, the use environment is bad. If the temperature of the hydraulic oil is too high, it will not only reduce the pressure bearing capacity of the hose and cause the joint leakage, but also accelerate the aging speed of the hose and shorten its service life.

四是胶管本身存在质量问题。

Fourth, there are quality problems in the hose itself.

2、原因排查

2. Cause investigation

分析认为，新出厂的装载机通常不会出现液压油温度过高现象。对管路走向、胶管长度、运动轨迹和弯曲半径进行复核，均在合理范围内，也没有发现胶管与胶管、胶管与机体发生摩擦的现象。检查胶管装配质量，没有发现管接头过松、过紧以及胶管扭曲现象。

The analysis shows that the temperature of hydraulic oil is not too high in new factory loader. The pipeline direction, hose length, movement track and bending radius were checked within a reasonable range, and there was no friction between hose and hose, hose and body. The assembly quality of the hose was checked, and no loose, tight or twisted hose was found.

进一步分析认为，胶管接头的扣压芯管与扣压外卡套的加工质量符合要求，是确保胶管不渗漏的关键。我们把质量较好、无渗漏的胶管接头与出现渗漏的胶管接头分别剖开进行对比，发现2种胶管接头芯管的加工质量确实有较大的差别。具体如下：

Further analysis shows that the processing quality of the core tube and the outer sleeve of the hose joint meets the requirements, which is the key to ensure that the hose does not leak. We compared the good quality, no leakage hose joint with the leakage hose joint, and found that there is a big difference in the processing quality of the two kinds of hose joint core pipe. The details are as follows:

一是扣压芯管扣压部分的长度不同。质量较好的胶管，其扣压芯管较长；而出现渗漏的胶管，其扣压芯管较短。

First, the length of the pressing part of the core tube is different. For better quality hose, the core tube is longer; The hose with leakage has a short core tube.

二是防滑凸齿齿形不同。质量较好的胶管，其扣压芯管防滑凸齿齿形为楔齿形；而出现渗漏的胶管，其扣压芯管防滑凸齿齿形为圆形。

Second, the anti-skid convex teeth have different tooth shapes. For better quality hose, the anti-skid convex tooth shape of the core tube is wedge-shaped; For the leakage hose, the anti-skid convex tooth shape of the buckle core tube is round.

三是扣压芯管壁厚不同。质量较好的胶管，其扣压芯管管壁较厚；而出现渗漏的胶管，其扣压芯管内孔过大，管壁较薄，扣压后扣压芯管出现较大变形。

Third, the wall thickness of the core tube is different. For better quality hose, the wall of the core tube is thicker; The inner hole of the hose with leakage is too large, the wall of the hose is thin, and the hose with leakage has large deformation.

由此看出，以上3种原因导致矿井装载机胶管扣压处容易发生渗油,希望可以帮助到您，更多精彩内容可以直接关注：http://www.kuangjingjixie.com

From this, we can see that the above three reasons lead to oil leakage at the rubber hose buckle of mine loader. I hope I can help you, and more wonderful contents can be paid attention to directly http://www.kuangjingjixie.com