6results about How to "Avoid local overheating problems" patented technology

The invention discloses a preparation method of a polypropylene composite filler based on electrocatalytic oxidation coal gasification fine slag as a raw material, the preparation method comprises the steps of raw material treatment, system modification, material electrolytic oxidation and material post-treatment, the polypropylene composite filler comprises polypropylene resin and the polypropylene composite filler, based on the total weight of the composite material, the usage amount of the composite filler is 5-20wt%, and the usage amount of the composite filler is 5-20wt%. The raw materials comprise an environment-friendly functional auxiliary agent accounting for 0.5-5% of the total weight of the composite material, and the functional auxiliary agent is selected from one of a weather-proof agent, a halogen-free flame retardant and a bio-based antibacterial agent. The method has the advantages that the low-temperature plasma pretreatment and the composite modifier assisted electrocatalytic oxidation process are combined, a large number of active sites can be quickly and efficiently introduced on the surface of the coal gasification fine slag through the low-temperature plasma treatment, and the surface energy and the reaction activity of the coal gasification fine slag are remarkably enhanced.

The utility model discloses a motor water-cooling structure with internal and external water channels, and the structure comprises a motor base which is provided with a water inlet and a water outlet, and a base body of the motor base is provided with a first water channel communicated with the water inlet; the front end cover is connected with one end of the base, and a cover body of the front end cover is provided with a second water channel; and the mounting seat is connected with the front end cover and extends into the base, and a seat body of the mounting seat is provided with a third water channel. The motor is simple in structure, and cooling liquid sequentially flows through the motor base, the front end cover and the interior of the motor base by arranging the inner water channel and the outer water channel to comprehensively cool different parts of the motor. Moreover, the reasonable design of each water channel enables the cooling liquid to be in uniform contact with each part of the motor, thereby greatly improving the heat dissipation efficiency of the motor.

The application relates to the technical field of silver-coated nickel powder preparation, in particular to silver-coated nickel powder with compact silver layer and a preparation method, which comprises the following steps: adding nano silver ions, sodium dodecyl benzene sulfonate, deionized water and ethanol into a reaction kettle and stirring, then adding nickel powder after acid washing and sodium potassium tartrate and stirring, adding sodium hydroxide in the stirring process to obtain a nickel powder reduction liquid; adding silver nitrate and diethylene triamine into deionized water, uniformly stirring to obtain a silver source solution, heating the nickel powder reduction liquid in the reaction kettle, dropping the silver source solution into the nickel powder reduction liquid for chemical reaction, obtaining local reaction intensity and reaction consistency of each temperature measuring point in the reaction process, then obtaining reaction abnormality to obtain an expected reaction temperature, and cleaning to obtain wet powder of the silver-coated nickel powder after the reaction is completed, and the silver-coated nickel powder body with compact silver layer is prepared through drying. The application can improve the adjustment precision of the silver coating reaction temperature and guarantee the preparation quality of the silver-coated nickel powder body.

The application discloses a fuel cell stack structure and a hydrogen fuel cell system. By adopting parallel arrangement of water channels of adjacent cells through an intermediate plate, the application can significantly optimize the internal fluid distribution uniformity of a high-power fuel cell stack. By adopting the parallel water channel structure, the cooling water circulation directly acts on a single cell, greatly reduces the flow passage resistance, ensures that each cell obtains stable and balanced water supply, effectively improves the internal temperature distribution and water management capability of the stack. Under high-power working conditions, the performance degradation and local overheating problems caused by unbalanced fluid distribution can be avoided, and the operation stability, durability and power density of the stack are improved. The structure is simple and reliable, is suitable for multi-cell stack expansion, can effectively break through the technical bottleneck of uneven fluid distribution in the power amplification process of a traditional stack, and provides strong support for the large-scale application of a high-power fuel cell stack.

The application discloses an oil tank heater and belongs to the technical field of vehicle fuel systems. The oil tank heater comprises an oil conveying pipe and a heating assembly, and the heating assembly is arranged at an oil inlet of the oil conveying pipe. The heating assembly comprises a hollow heating pipe and a shielding part. The hollow heating pipe is internally provided with a flow channel for fuel flow, the side wall of the hollow heating pipe is provided with an oil inlet, and the upper end of the hollow heating pipe is communicated with the oil conveying pipe. The shielding part is arranged above the hollow heating pipe and is used for blocking the upward diffusion of the fuel heated by the hollow heating pipe. The shielding part is used as a physical barrier to effectively prevent the disorderly diffusion of heat to cold oil with large volume, and the heated fuel is forced to enter the internal flow channel through the oil inlet, directional and concentrated high-efficiency heating is realized, and the heating efficiency is greatly improved and the energy consumption is reduced.