33results about How to "Extended overhaul period" patented technology

The invention discloses a motor, especially providing a petrol motor with reasonable operation, energy-saving, high exchange efficiency and non-side force component. It is formed by a fuel fire system and a boss axle, wherein, it comprises at least one main axle of main transmission wheel element and a horizontal power cylinder relative to the main transmission wheel element; and one end of piston rod of power cylinder is hinged with the chain on the edge of main transmission wheel element. Compared with present technique, it has more reasonable operation of piston, non-side force component, less abrasion between sleeve and cylinder, and prolonged maintenance period. The tension arm for transmitting torque to the main axle is always in the longest position without dead point to improve the power exchange efficiency, save energy, simplify producing process, and reduce cost. The invention can apply variable fuels as mechanical motor.

The nanometer vibration-reducing and noise-reducing self repairing material is prepared with nanometer level metal powder and natural ore powder as main material and through adding several kinds of supplementary material and certain technological process, and is added into lubricating oil or ultrasonic medium as high performance repair material. The present invention features that the high performance repair material can create high hardness self-repairing lubricating film fast on the surface of metal friction pairs to regulate the interval of the friction pair, reduce friction coefficient, raise bearing capacity, leveling the friction surface, reduce vibration and noise caused by the unbalance, friction and damage of the moving machine parts, and prolong the service life of the machine parts. The present invention may be used widely in improving performance of mechanical friction parts.

The invention relates to a precipitation hardening stainless steel material with laser alloying surface manufacturing technology and its application. It is made up precipitation hardening stainless steel basal body and alloying coating which is processed by alloying technology for paint contains W, Co, Cr, Ni alloy powder. The processed precipitation hardening stainless steel remains original better comprehension mechanical property, and has high surface hardness. Thus it has wide application range. The 17-4PH stainless steel is fit for making turbine blade.

This invention relates to new cleaning oil for engines, which is composed of one or many of ordinary motor-oils as the basic oil: 150SN, 500SN, 650SN, 150BS and advanced motor-oil from south Korea: SK70n, SK150N, and SK100N, anticorrosive, oxidation inhibitor, antiwear agent, detersive pour-point depressant and freely selected defoamer agent. In preparation, a computer is used to control the volume of the additives and the regulation temperature so that, they can fully contact with each other and interfuse with each other to get the target of the engine oil standard.

The invention relates to a metal / ceramic nanocomposite self-healing additive, which is made of metal nanopowder and nanoscale natural ore powder as the main raw materials, supplemented with cleaning and dispersing agents, catalysts, antioxidants, solvents and other materials after certain process conditions and High-performance nanocomposite self-healing additives for lubricating oils, greases or ultrasonic media made in the production step. Its advantage is that it can quickly form a high-hardness metallurgical bonded self-repairing protective layer on the surface of various metal friction pairs, and automatically adjust the thickness of the self-repairing protective layer according to the friction force and the friction pair gap, so as to optimize the friction pair gap and significantly improve The physical and chemical properties of the surface of the friction pair, energy saving and environmental protection, greatly prolong the service life of machine parts and the period of machine overhaul. The invention is widely used in improving the lubricating performance of the friction pair.

The invention relates to the field of engines, and discloses a piston ring, a piston assembly and an engine. The piston ring is a broken ring structure with an opening, each shaft section of the piston ring and the outer peripheral wall of the piston ring intersect to form a first curve, and points furthest from the central axis of the piston ring on the first curve are sequentially connected in the circumferential direction of the piston ring to form a second curve; and the end face, facing the bottom of the piston, of the piston ring is a first plane, and the distance from the points on thesecond curve to the first plane has an increased trend in the direction far away from the opening. On the premise of not greatly adjusting the structure of the piston ring, the type line of the outerperipheral wall of the piston ring is optimized, the contact pressure between the outer peripheral surface of the piston ring and the inner wall of a cylinder sleeve is almost consistent, the wear resistance of the outer peripheral surface of the piston ring, especially the wear resistance of the opening position of the piston ring, is improved, and after the piston ring is worn, the piston ring cannot be subjected to abnormal wear with the cylinder sleeve, so that the engine oil cannot be scraped into a combustion chamber when the piston ring moves upwards.

The invention relates to a method for rolling the valve surface of an exhaust valve. The exhaust valve is fixed on the turntable of the rolling device, and then the roller is pressed on the valve surface of the exhaust valve. Use the rollers to apply pressure to the valve surface. The steps for rolling the rollers to the valve surface are to align the rollers of the rolling device with the inner side of the valve surface, and then press the rollers to the valve surface. Apply pressure, the process of applying pressure is: pressure increase → pressure maintenance → pressure increase → pressure maintenance →...increase to the set maximum pressure, the pressure generally increases in steps, rolling out a certain depth on the valve surface After the first groove, loosen the roller, and then continue to roll out other grooves to the outside of the first groove on the valve surface, and finally process the valve surface that has rolled out multiple grooves to remove the allowance. Using the method of the invention, the surface hardness of the exhaust valve can be increased by 80-110HV compared with the common rolling method, so that the service life of the exhaust valve can be increased by 1-3 times.

The invention relates to a process for preparing environmental friendly diesel fuel additive comprising, placing alcohol isopropylicum into reaction kettle, mixing with 93# gasoline, after 1.5-2.5 hrs, continuing charging in phenylmethanol and mixing, obtaining solution A, placing plane kerosene (D40) into another reaction kettle, mixing with cyclohexanone to obtain solution B, after 8-14 hours, mixing solution an and B, filtering 2-5 times.

The invention provides a self-repairing lubricating grease and a preparation method thereof. The grease comprises the following components: iron oxide powder, copper oxide powder and graphite powder are mixed as oxide micropowder; metal zinc powder and carbon black micron particles are mixed as reducing Agent powder; metal aluminum powder, metal silver powder mixed as inducer powder; succinimide as dispersant; polyacrylamide as antioxidant; HVIWH150 as base oil. Compared with the prior art, in addition to the conventional lubricating effect of the grease of the present invention, the oxide fine powder and reducing agent fine powder will be oxidized by the inducer fine powder only when the gap between metal friction pairs increases to cause extreme pressure conditions. The reduction reaction produces zinc oxide and iron to fill the grooves and defects on the surface of the friction pair, thereby achieving the effect of self-healing.

The invention discloses a processing method of a sealing surface of an exhaust valve of a low-speed diesel engine, which is characterized in that a deformed and high-temperature Ni-Cr precipitation-hardening alloy containing Nb is utilized to be overlaid in a ring groove of the exhaust valve, and a reticular precipitation tissue with hardness of HV10540-580 is formed through rolling and aging precipitation-hardening processing. By the method, the hardness of the sealing surface is improved; and when in use, the sealing surface has small possibility of cracking, the production cost is controlled effectively, major repair time of the diesel engine is prolonged, and the method has a wide promotion value and market prospect.

The invention discloses a preparation method of a high-and-low-temperature-resistant micro-nano lubricating material, and belongs to the technical field of lubricating materials. According to the method, firstly, cobalt nitrate and iron nitrate are dissolved and mixed; evaporative crystallization is performed to obtain uniform crystals; then, the uniform crystals are mixed with urea; through ball milling, mixed crystal powder is obtained; cooled marsh gas liquid is used as a cooling medium; oxygen is used as conveying gas; the mixed crystal powder is subjected to meltallizing in a high-energy flame spray gun through an oxyacetylene torch and enters the cooling medium to obtain micro-nano scale hollow microsphere powder; the hollow microsphere powder is uniformly mixed with surfactants such as Tween-20, and polyoxyethylene lauryl ether through heating; then, the mixture is uniformly dispersed with basic oil through ultrasound when the mixture is still hot; cooling is performed, so that the hollow microsphere powder absorbs lubricating oil; then, the temperature is raised again, and the cooling is performed again; the absorption is further performed; after the curing, the high-and-low-temperature-resistant micro-nano lubricating material is obtained. The obtained lubricating material has the advantages that the uniform dispersion is performed in high-temperature environment; the oxidation cannot easily occur; the adhesion does not occur under a low-temperature condition; the lubricating performance is excellent; wide application values are realized.