挖掘機在工作時無力的原因與維修技術(shù)

Reason and maintenance technology of excavator at work powerless

1發(fā)動機功率足夠，運轉(zhuǎn)正常，而挖掘機作業(yè)速度緩慢，挖掘無力。

1 engine power is sufficient, in normal operation, while the excavator is slow, weak mining.

2挖掘機的液壓泵多為變量柱塞泵，工作一定時間以后，泵內(nèi)部零件不可避免的產(chǎn)生磨損，造成內(nèi) 漏，各參數(shù)數(shù)據(jù)不協(xié)調(diào)，導(dǎo)致流量不足、油溫過高，速度緩慢，不能建立起高壓，所以動作 緩慢無力。對于這類問題須卸下液壓泵進行數(shù)據(jù)測量，確認問 題所在，更換不能繼續(xù)使用的配件，或修復(fù)可一己續(xù)使用的配件，重新組裝后上校驗臺調(diào)試，匹配各 回路參數(shù)(壓力、流量、功率及變量等)。

The hydraulic pump 2 excavator multi variable piston pump, some time later, inevitably produce wear parts inside the pump, resulting in leakage, the parameter data is not harmonious, resulting in insufficient flow, high oil temperature, slow speed, cannot build up high, so slow to. For this kind of problem must remove the hydraulic pump to measure data, confirm the problem, can not continue to use the replacement of parts, or repair their continued use of accessories, re assembled after the test bench, the Colonel debugging, the circuit parameters (pressure, flow, power and variable etc.).

3挖掘機上一個重要液壓元件－多路分配閥，上面有主安全閥、二次閥、溢流閥、補油閥等。若這 些閥所設(shè)定的壓力達不到標(biāo)準(zhǔn)壓力則導(dǎo)致挖掘無力。另外，若閥桿與閥孔之間因為磨損而間隙過大， 閥桿回位不完全、換向不到位，則大量內(nèi)漏，導(dǎo)致流量不足，速度緩慢。此類問題，應(yīng)當(dāng)卸下多路分 配閥，送到實驗臺進行調(diào)試，重新設(shè)定所有閥的壓力至標(biāo)準(zhǔn)壓力，消除閥桿與閥孔之間的間隙即可。

An important assignment of hydraulic components multi valve 3 excavator, above the main safety valve, two valve, relief valve, oil supply valve etc.. If the valve set pressure not up to standard pressure leads to mining weakness. In addition, if the valve stem and valve hole between the gap is too large because of wear, the stem return incomplete, change is not in place, a large amount of internal leakage, resulting in insufficient traffic, slow speed. This kind of problem, should remove the multi-channel distribution valve to the experimental platform for debugging, re set the pressure to all standard valve, can eliminate the gap between the valve stem and valve hole.

山推機械故障代碼大全，工程機械發(fā)動機支架墊怎么判斷損壞，康明斯 報錯1312。康明斯b3.3發(fā)動機維修手冊