1、原因分析

1. Cause analysis

部分3t型裝載機在工作500~1000h后，多次出現(xiàn)起升缸膠管輕度滲油現(xiàn)象。分析認(rèn)為，造成膠管損壞的原因通常有以下4點：

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

一是設(shè)計不合理。如果膠管設(shè)計時，膠管安裝的長度余量小于5％，容易將膠管接頭拉出。如果設(shè)計的膠管走向不合理，會造成膠管與膠管或膠管與機體容易發(fā)生磨擦，從而導(dǎo)致膠管外皮破裂。

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.

二是裝配不當(dāng)。膠管接頭安裝過松或過緊，都會造成接頭泄漏。安裝時，膠管扭曲大于30°、膠管彎曲半徑過小，均可使膠管使用壽命降低。

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.

三是使用環(huán)境惡劣。如液壓油溫度過高，不僅可導(dǎo)致膠管承壓能力降低，引起接頭漏油，還會加快膠管老化速度，使其使用壽命縮短。

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.

四是膠管本身存在質(zhì)量問題。

Fourth, there are quality problems in the hose itself.

2、原因排查

2. Cause investigation

分析認(rèn)為，新出廠的裝載機通常不會出現(xiàn)液壓油溫度過高現(xiàn)象。對管路走向、膠管長度、運動軌跡和彎曲半徑進行復(fù)核，均在合理范圍內(nèi)，也沒有發(fā)現(xiàn)膠管與膠管、膠管與機體發(fā)生摩擦的現(xiàn)象。檢查膠管裝配質(zhì)量，沒有發(fā)現(xiàn)管接頭過松、過緊以及膠管扭曲現(xiàn)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.

進一步分析認(rèn)為，膠管接頭的扣壓芯管與扣壓外卡套的加工質(zhì)量符合要求，是確保膠管不滲漏的關(guān)鍵。我們把質(zhì)量較好、無滲漏的膠管接頭與出現(xiàn)滲漏的膠管接頭分別剖開進行對比，發(fā)現(xiàn)2種膠管接頭芯管的加工質(zhì)量確實有較大的差別。具體如下：

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:

一是扣壓芯管扣壓部分的長度不同。質(zhì)量較好的膠管，其扣壓芯管較長；而出現(xiàn)滲漏的膠管，其扣壓芯管較短。

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.

二是防滑凸齒齒形不同。質(zhì)量較好的膠管，其扣壓芯管防滑凸齒齒形為楔齒形；而出現(xiàn)滲漏的膠管，其扣壓芯管防滑凸齒齒形為圓形。

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.

三是扣壓芯管壁厚不同。質(zhì)量較好的膠管，其扣壓芯管管壁較厚；而出現(xiàn)滲漏的膠管，其扣壓芯管內(nèi)孔過大，管壁較薄，扣壓后扣壓芯管出現(xiàn)較大變形。

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種原因?qū)е碌V井裝載機膠管扣壓處容易發(fā)生滲油,希望可以幫助到您，更多精彩內(nèi)容可以直接關(guān)注：http://yygsbaby.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://yygsbaby.com