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

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.

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 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 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.