喷油嘴喷孔挤压研磨及装机试验分析
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摘要
为了解决喷油嘴流量低导致的燃油消耗率高和排气温度高等问题,采用KYM-2型喷油孔液体挤压研磨机进行了喷油嘴喷孔挤压研磨试验,并在XCW8200ZC-10型柴油机上进行了推进特性试验。喷油嘴喷孔挤压研磨及装机试验结果表明:挤压研磨压力为7 MPa,挤压研磨时间为20 s时,流量由挤压前的3.380 L/min增加至4.117 L/min,流量系数由挤压前的0.69提高至0.84,流量分散度由挤压前的-6.7%～5.8%缩小至-4.0%～3.5%。在标定工况,挤压研磨后的燃油消耗率比挤压研磨前的低5 g/(kW·h),挤压研磨后的总管排气温度比挤压研磨前的低18℃。
In order to prove engine performance,including the specific fuel consumption and exhaust temperature,due to the lower flow coefficient nozzle, the test of the liquid extrusion grinding in spray hole of the nozzle is conducted in KYM-2 liquid extrusion grinder, and the engine propulsion characteristic test in XCW8200-ZC diesel engine is also conducted. The results of the liquid extrusion grinding in spray hole and assembly tests show that the flow was increased from 3.380 L/min up to 4.117 L/min, the flow coefficient was increased from 0.69 up to 0.84 and the flow dispersion was decreased from-6.7%～5.8% to-4.0%～3.5%. The specific fuel consumption is 5 g/(kW·h) lower and the exhaust temperature of main pipe is 18 ℃ lower than that of the original products under a rating condition.
In order to prove engine performance,including the specific fuel consumption and exhaust temperature,due to the lower flow coefficient nozzle, the test of the liquid extrusion grinding in spray hole of the nozzle is conducted in KYM-2 liquid extrusion grinder, and the engine propulsion characteristic test in XCW8200-ZC diesel engine is also conducted. The results of the liquid extrusion grinding in spray hole and assembly tests show that the flow was increased from 3.380 L/min up to 4.117 L/min, the flow coefficient was increased from 0.69 up to 0.84 and the flow dispersion was decreased from-6.7%～5.8% to-4.0%～3.5%. The specific fuel consumption is 5 g/(kW·h) lower and the exhaust temperature of main pipe is 18 ℃ lower than that of the original products under a rating condition.
引文
[1] 马会青,刘利,杨晓宁,等.双排喷孔液体挤压研磨压力的研究[J].现代车用动力,2011(3):41-43.
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[2] 唐维平,严忠杰,喻鸣显.喷油嘴喷孔及压力室液体研磨技术研究[J].内燃机燃油喷射和控制,2001(2):36-40.
[3] 唐维平,宋伟,喻鸣显,等.喷油嘴喷孔液体挤压研磨工艺研究[J].现代车用动力,2003(2):30-34.
[4] 全国燃料喷射系统标准化技术委员会.柴油机喷油嘴偶件技术条件:GB/T 5772—2010,[S].北京:中国标准出版社,2010:3 -6.
[5] 张礼林.喷油嘴偶件高压流量对油泵及发动机性能的影响[J].内燃机燃油喷射和控制,1999(1):32-36