Application of Cryogenic Treatment Technology in the Field of Diesel Engine
2014-06-12 09:52:00
The cryogenic treatment technology is fundamentally different from the traditional freezing treatment (-80 ° C) used for fuel system components. The cryogenic treatment can lead to the transformation of residual austenite, the precipitation of fine carbides, and the reduction of the internal force of the material, thereby increasing The wear resistance and dimensional stability of diesel engine parts improve the reliability of diesel engines.
1. Research on improving the reliability of fuel injection pump
(1) Improve the wear resistance and dimensional stability of the plunger couple, ensure the oil supply pressure, and increase the actual service life of the plunger couple.
(2) Improve the wear resistance and dimensional stability of the oil outlet valve coupler,
(3) Improve the wear resistance of the injection pump camshaft and extend the working life,
(4) Improve the service life of plunger spring and outlet valve spring.
In addition, the use of high-speed steel W9Mo3Cr4V to make the injection pump couple, combined with cryogenic treatment, not only improves the machining performance, but also the size is stable, and the wear resistance increases exponentially, so the performance and life of the injection pump couple are selected degree.
2. Research on improving the reliability of fuel injector
Cryogenic treatment can have the following effects:
(1) Improve the wear resistance, fatigue resistance and dimensional stability of the needle valve coupler of the injector, and extend the working life of the injector;
(2) The injection nozzle is made of high-speed steel W9Mo3Cr4V with high temperature resistance and good processing performance, combined with the cryogenic treatment process, to further improve the reliability of the injector parts;
(3) Improve the fatigue strength and dimensional stability of the pressure regulating spring.
3. Research on improving the life of diesel engine moving parts
The effect of the cryogenic treatment process on aluminum materials, stainless steel materials and alloy structural steel materials is to improve the strength and dimensional stability of the components, and to the pistons, connecting rods and piston pins of diesel engines. Deputy marketing can improve the reliability of their work.
Specifically in:
(1) Cryogenic treatment can improve the dimensional stability of the piston, prevent or reduce the amount of deformation during work, and improve the wear resistance of the upper and lower end surfaces of the piston pin hole and piston ring groove;
(2) Improve the wear resistance of the piston vanadium auxiliary connecting pin; prevent or reduce the amount of deformation after stress;
(3) Improve the strength and dimensional stability of the connecting rod:
(4) The second stage of work focuses on solving the reliability problems of large moving parts such as camshafts and crankshafts. Through cryogenic treatment, it can increase the ability of crankshaft or camshaft to deform and improve its strength and wear resistance, thereby extending its service life.
4. Improve the wear resistance of the cylinder liner and extend the working life
The most frequent failures of cylinder liners are deformation, wear and corrosion in work. The source cold treatment technology is used to reasonably change the metallographic structure of the cylinder liner, refine the grains, improve the wear resistance of the cylinder liner, prevent excessive deformation during work, and reduce (cavity) corrosion to a certain extent.
Nuoruida (Tianjin) science and Technology Co., Ltd. is committed to research, development, and sales of liquid nitrogen cryogenic equipment. Using European technology, we provide a variety of equipment. The main equipment is liquid nitrogen equipment, cryogenic furnace, cryogenic processing equipment, low temperature assembly equipment, cryogenic assembly equipment, and so on.
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