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In the present work,Cu nanoparticles with an average size of 20-50 nm were dispersed in diesel fuel oil . A injection pump plunger was in-situ repaired on a 12PSDB75 fuel injection pump by applying auto-reconditioning function of Cu nanoparticles. Mophologies and typicle element distributions of the plunger piston surface before and after repair were analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy.

将平均粒径为20~50nm的铜粉均匀分散到柴油中，在12PSDB75型喷油泵试验台上利用纳米铜微粒的磨损自修复性能，在不拆卸零件的情况下对磨损失效的喷油泵柱塞偶件进行了原位修复，利用扫描电镜、能谱仪等对修复前后柱塞表面进行了形貌与微区成分分析。

First, common pump problems: China's oil fields now use the plunger and pump barrel to more than gaps between the main seal.

一、常用抽油泵存在的问题：现在我国各油田使用的柱塞和泵筒间多以间隙密封为主。

First common pump problems: China's oil fields now use the plunger and pump barrel to more than gaps between the main seal.

一、常用抽油泵具有的问题：现在我国各油田使用的柱塞和泵筒间多以间隙密封为主。

Final point of view from the pump, pump barrel and plunger of the materials and surface treatment of choice in deciding the wear of the tribological system, the determinants of corrosion.

最终从抽油泵角度上看，泵筒和柱塞的材料和表面处理工艺的选择成为决定这个摩擦学系统腐蚀磨损量的决定因素。

In accordance with this circumstance, a new type of oil well pump has been designed and developed - auto - compensation soft plunger pump.

针对这种情况，设计研制了一种新型井下抽油泵——自补偿式软柱塞泵。

With the surface treatment technology and material processing technology improve, there will the introduction of new cylinder plunger with the pump materials and surface treatment processes, then pay particular attention to the plunger and pump cylinder Optimal Matching Materials.

随着表面处理技术和材料加工工艺的提高，不断会推出新的柱塞与泵筒的材料和表面处理工艺，这时尤其要注意柱塞和泵筒的材料的优化匹配。

The performance and working life of the seals of drilling mud pump plunger will have a direct impact on the working behavior and quality of the high-pressure mud pump.

钻井泥浆泵柱塞密封性能的好坏与使用寿命的长短直接影响到高压泥浆泵的工作性能及质量。

The mist pump is a single acting triplex liquid injection pump rated for 1500 PSI at a maximum flow rate of 62 GPM with 2 plungers.

雾泵是一种单作用三缸液体喷射泵，当其使用2英寸柱塞时，在最大流量为62加仑/分钟条件下，其额定压力可以达到1500磅/平方英寸。

The high pressure pump has one or more reciprocating pumping plungers (14) and a pumping plunger actuator (62, 48, 66) driven by the drive shaft for reciprocating each pumping plunger to provide alternating intake and pumping phases of operation of the high pressure pump, at a frequency determined by the rotational speed of the drive shaft, for respectively receiving an intake charge of fuel and delivering fuel at high pressure for fuel injection.

高压泵具有一个或多个往复移动的泵送柱塞（14）和一个泵送柱塞驱动装置（62，48，66），其由驱动轴驱动，以便往复移动每个泵送柱塞，从而在由驱动轴转速决定的频率下提供高压泵工作的交替的吸入和泵送相，以便分别接受燃油的吸入量和为燃油喷射高压输送燃油。

Is clear from the viscosity of the fluid delivery when the pump is not the same time, the pump shaft power will be different.

由上可见，当泵运送的液体粘度不同时，泵的轴功率也将不同。

The Porsche Owner: But it's my car!

可，这是我的车呀。

LOX_83}{Oh, another bunch of wackos.

{LOX_83}{呃，又一群怪人。