5results about How to "Improve performance parameters" patented technology

This invention provides a high-parameter SiC / SiC ceramic matrix composite material, relating to the field of aerospace high-temperature structural materials. This high-parameter SiC / SiC ceramic matrix composite material is composed of a SiC fiber preform, an interface phase, and a SiC matrix; the interface phase is a BN layer or a PyC+BN composite gradient layer; the SiC fiber preform adopts a 3D orthogonal braided or needle-punched structure, with a fiber volume fraction of 45%–55%; the SiC matrix is ​​prepared by a CVI+PIP composite process, with a matrix porosity ≤5%. The preparation method includes four main steps: SiC fiber preform preparation, interface phase deposition, SiC matrix densification, and environmental barrier coating. By optimizing the preform braiding structure, interface phase type, and matrix composition, combined with specific preparation processes, the composite material meets the requirements of high mechanical properties, high high-temperature oxidation resistance, high density, and high thermal conductivity. This preparation method, through CVI+PIP composite process optimization, nano-dispersed phase addition, and gradient interface phase design, overcomes existing process bottlenecks and achieves the industrial-scale preparation of high-performance composite materials.

The utility model discloses a production system for continuously preparing a multi-component aramid copolymer, which belongs to the technical field of multi-component aramid preparation devices and comprises a premixing kettle, a continuous reactor and a double-screw reactor which are sequentially connected, the double-screw reactor is connected with a neutralizing tank I through a pipeline I, and an outlet of the neutralizing tank I is sequentially connected with a washing machine and a drying machine; the double-screw reactor is connected with a neutralizing tank II through a pipeline II, an outlet of the neutralizing tank II is sequentially connected with a defoaming kettle, a filter and a spinning solution storage tank, a heat exchanger I is arranged on a pipeline between the premixing kettle and the continuous reactor, and a heat exchanger II is arranged on a pipeline between the continuous reactor and the double-screw reactor. The front end of the continuous reactor and the front end of the double-screw reactor are both connected with a terephthaloyl chloride supply pipeline, the premixing kettle is connected with an auxiliary pipeline and a monomer supply pipeline, the production system provides matched production equipment for continuous preparation of the multi-component aramid copolymer, and stable, continuous, efficient and large-scale production of the multi-component aramid copolymer is guaranteed.

The application discloses a kind of high flash point low-loss engine oil preparation process, and the product belongs to the field of lubricant production.The engine oil is formed by high flash point base oil, additive compound after removal of low flash point volatile component by heating vacuum, removal of light component again and filling, and the base oil flash point is greater than or equal to 220 DEG C, NOACK evaporation loss is less than or equal to 8%.The preparation process includes: screening high flash point low-volatile base oil, heating to 50-150 DEG C and removing light component under negative pressure vacuum.The light component is removed from the additive under negative pressure vacuum.The treated base oil is mixed with the additive in proportion, and then vacuum light removal and degassing are carried out at 50-150 DEG C, and the finished product is filled into the pipeline of the displacement filling machine after full replacement.The application significantly improves the flash point of engine oil and reduces volatile loss by the whole-process light removal process, which can greatly reduce the load of engine oil gas separator, improve separation efficiency, solve the problems of high engine oil consumption, poor high-temperature resistance, easy oxidation and deterioration, and high oil sludge and carbon deposition.

The application provides a compressor non-axisymmetric end wall shaping method based on an adjoint shape optimization, and belongs to the technical field of aero-engine compressor design, in particular to: taking an axisymmetric end wall compressor as an optimization object, sequentially completing a cascade single-channel original geometric model establishment, structured grid division, obtaining the isentropic efficiency of the compressor designed by using the axisymmetric end wall through flow field simulation, establishing an optimization target and a constraint condition, solving the sensitivity of a design variable based on an adjoint shape optimization method, arranging control points on the outer surface of the end wall, combining the total displacement amount of the control points with the sensitivity calculation, realizing the end wall grid deformation through a radial basis function, iteratively optimizing the performance of the current end wall geometric configuration through simulation verification, and until the end wall meets the optimization target and the constraint condition. The application improves the optimization efficiency and shaping precision of the compressor end wall, improves the isentropic efficiency of the compressor, and guarantees the stability of the performance parameters of the optimized compressor.

This utility model discloses a novel motor rotor, including a rotor core. Multiple magnetic slots for accommodating magnets are evenly distributed circumferentially on the rotor core. The outer circumferential contour of the rotor core is composed of alternating arc-shaped segments and recessed segments connected end-to-end. Each recessed segment consists of two symmetrically arranged, inwardly recessed stepped structures, forming a slot between the two stepped structures. The stepped structure includes an outer inclined portion, a platform portion, and an inner inclined portion connected sequentially from the outer circumference of the rotor core towards the center. The outer inclined portion and the platform portion have a first preset angle. By optimizing the magnetic circuit structure and external contour design of the rotor core, the magnetic field distribution is more concentrated, reducing magnetic leakage, decreasing the amount of permanent magnets used, saving production costs, and reducing the overall weight of the rotor. This effectively improves the motor's operating efficiency and power density, enhances the motor's overall performance parameters, and strengthens the product's market competitiveness.