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油泵供油不均的原因是什么?

發布時間:2017-09-15 17:22:39   發布人:http://www.aiqin1.cn
1.調試狀態與使用條件的不同
1. debug status and use conditions are different
油泵在試驗臺上是在常溫下進行調試的,而裝機使用則是在汽缸壓縮終了、缸內溫度達500~700℃、壓力3~5MPa條件下使用,兩者差別較大。機車作業時,油泵與噴油器的溫度均達90℃左右,也會造成柴油粘度下降,因而柱塞與針閥偶件的內漏增多,回油量也比調試時多。據測定,油泵實際噴入缸內的油量只有試驗臺調試量的80%左右,雖然油泵調試人員會考慮這個因素,但不可能精確掌握。
The oil pump is debugged on the test bed at room temperature, and the installation is done under the condition of cylinder compression end, cylinder temperature up to 500~700 DEG C and pressure 3 ~ 5MPa, and the difference is great. When the locomotive works, the temperature of the oil pump and the injector is about 90 DEG C, and the viscosity of the diesel oil will also be reduced. Therefore, the leakage of the plunger and needle valve is increased, and the oil return is more than that of the debugging. It is determined that the actual oil injected into the cylinder is only about 80% of the debugging capacity of the test stand. Although the oil pump operator will consider this factor, it is impossible to master it accurately.

2.調試時存在的供油不均勻
2. when debugging, uneven oil supply exists
油泵在試驗臺調試時,要求各缸在額定轉速下的供油量不均勻度應<3%。實際調試過程中,由于試驗臺專用的噴油器和高壓油管長度、形狀、口徑等不可能與原機完全一致,再加上調試技術的差異,油泵裝機后,實際噴入缸內的油量不均勻度往往>3%。
When the oil pump is debugged in the test stand, the required oil supply rate of each cylinder at the rated speed shall be <3%. The actual debugging process, due to the special injector test bench and high-pressure pipe length, shape, diameter and may not be completely consistent with the original engine, coupled with differences in debugging technology, the pump installed, the actual amount of oil injected into cylinder nonuniformity is often >3%.
3.機件故障引起的供油不均勻
3. uneven oil supply caused by mechanical fault
機車經長期使用,由于油泵驅動聯軸節松曠或間隙過大,驅動齒輪磨損、側隙增大,也會影響各缸供油均勻度。另外,高壓油管接頭因頻繁振動或擰緊不夠的滲漏,以及擰緊力過大使接頭金屬脫落并堵塞油管,同樣會引起各缸供油量的不均勻。
After long-term use of the locomotive, due to the loose or too large clearance of the drive coupling of the oil pump, the abrasion of the gear and the increase of the backlash will also affect the uniformity of the oil supply of each cylinder. In addition, due to frequent vibration or tightening of the tight oil pipe leaks, as well as tightening the force, the ambassador joints metal fall off and plug the tubing, the same will cause uneven oil supply of each cylinder.
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