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油泵供油不均的原因是什么?

發布時間:2017-05-05 16:21:42   發布人:http://www.aiqin1.cn
氣體增壓泵在試驗臺上是在常溫下進行調試的,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。另外,由于缸套活塞與配氣機構的磨損或密閉程度的不同,各缸壓縮后的溫度與壓力也會有差別。即使試驗臺上調試好的油泵,裝機使用后,各缸供油量也會產生不均勻。
Gas booster pump on the test bench is debug at room temperature, the locomotive operation, the oil pump and fuel injector temperature of 90 ℃ or so, also can cause the loss of diesel oil viscosity, thus plunger and needle valve an increase in the number of internal leakage, oil return amount is more than when debugging. Measured according to the actual injection pump cylinder oil is only about 80% of the amount of test bench debugging, although the oil pump commissioning staff will take this factor into consideration, but it can't accurately. In addition, the temperature and pressure of each cylinder will be different due to the different degree of wear or closure of the cylinder piston and the gas distribution mechanism. Even if the oil pump is debugged on the test stage, the quantity of oil can be uneven after the installation.

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%。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。
When the oil pump is debugged at the test bed, the quantity of oil at the rated speed of the cylinder shall be less than 3%. Actual debugging process, due to the special test bench of fuel injector and high-pressure tubing length, shape, diameter and so on can't be exactly the same as that of the original machine, plus debugging technical differences, oil pump installed after the actual injection in cylinder oil is not uniformity often > 3%. The locomotive has been used for a long period of time, because the oil pump drive coupling is loose or the clearance is too big, the driving gear wear and the side clearance increase, also can affect each cylinder the oil supply the uniformity degree. In addition, the high pressure oil pipe joint leakage due to frequent vibration or tight enough, and tighten force ambassador joint metal fall off and blocking the tubing, can also cause uneven of each cylinder oil.
在油泵和調速器彈簧中,其中受力較強、變形較大、工作頻率較高的當屬柱塞彈簧。所以其折斷頻率也較高。輕者噴油量減少、各缸噴油量不均、各缸噴油間隔時間超差、噴油開始時間延遲;重者供油間斷甚至不能供油。
In the oil pump and governor spring, the force is stronger, the deformation is bigger, the working frequency is higher and is the plunger spring. So it's got a higher fracture frequency. The amount of fuel oil is reduced, the amount of oil is not evenly distributed, the time of each cylinder is very poor and the oil spray starts to delay. The heavy fuel is discontinued and not even supplied.
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