5results about How to "Promote lightweight development" patented technology

This utility model relates to a solid chemical oxygen generator, including a generator shell, a starting device, and an oxygen candle. The oxygen candle is housed inside the generator shell, with a heat insulation layer between the oxygen candle and the generator shell. A filter device is located on the outside of the oxygen candle, comprising a filter spiral tube coiled around the outside of the oxygen candle. The filter material is filled inside the filter spiral tube and fixed by metal meshes at both ends. The lower end of the filter spiral tube is connected to the bottom of the oxygen candle via a U-shaped conduit. This utility model integrates the spiral tube-shaped filter device inside the oxygen generator, eliminating the need for an additional filter device and facilitating the lightweight development of oxygen generators. The spiral tube structure ensures full contact between the gas and the filter material, and the heat generated by the decomposition of the oxygen candle accelerates the absorption of harmful gases by the filter material, reducing the amount of filter material required and improving filtration efficiency.

The invention belongs to the technical field of superconducting, and relates to an insulation enhanced superconducting cable and a preparation method thereof. The method comprises the following steps: firstly, reinforcing a superconducting wire rod through a NiCoCr / Cu composite matrix, and carrying out multi-channel coating and on-line monitoring by adopting BN modified polyimide paint to form a uniform insulating layer; and then wrapping and hot pressing are carried out by using a B-stage epoxy-impregnated aromatic polyamide tape to construct an insulation enhanced structure. Stranded cable forming is carried out through tension control and a numerical control positioning die, and the composite cable is formed by combining the core wire and the multiple layers of insulation reinforced wires. Finally, through secondary wrapping and pretension braiding protection, the superconducting cable with the coverage area larger than or equal to 99.9% and the void ratio smaller than 1% is obtained, the withstand voltage between strands is larger than 5000V, the withstand voltage between cables is larger than 7000V, the mechanical stability and the thermal management performance are remarkably improved, and the superconducting cable is suitable for being applied to high-field magnets and fast pulses.

This invention relates to the field of rail vehicle technology, providing a train bogie and a rail vehicle. The train bogie includes a frame and a wheel drive system. The frame includes a load-bearing body and two leaf springs. A center pin channel is formed in the middle of the load-bearing body, and two mounting channels are formed along the longitudinal direction of the frame. The two leaf springs are respectively mounted in the two mounting channels. The wheel drive system includes a shaft core, a bushing, and two wheels. The shaft core is rotatably mounted inside the bushing. A gearbox is constructed on the bushing, and a driving gear is provided inside the gearbox. A driven gear is sleeved on the shaft core, and the driving gear and the driven gear mesh externally. The two wheels are respectively mounted on both ends of the bushing via bearings, and the two wheels are respectively connected to both ends of the shaft core via flexible plates. Each leaf spring has a pad at both ends, and the pad is connected to the bushing. The load-bearing body and leaf springs replace the original crossbeam and side beam structure, resulting in a significant weight reduction effect on the frame.

The invention provides a stator of a flat wire motor, which comprises a stator core and a flat wire winding, the number of winding slots of the stator core is 48, the number of poles of the flat wire winding is 8, the number of winding slots of each pole and each phase of the stator core is 2, the number L of layers formed by the flat wire winding in the winding slots is an even number greater than 2, the flat wire winding of each phase comprises four branches, and the branches are parallel to each other. Each branch is wound in the form of a continuous wave winding; the winding of each branch circuit is subjected to continuous cross-layer wire embedding between the first layer and the Lth layer and traverses each pole in the circumferential direction, the interval between the adjacent slots embedded between the radial outermost layer or the radial innermost layer of the winding of each branch circuit is 5, and the intervals between the adjacent slots embedded between the other layers of the winding of each branch circuit are all 6. The winding structure of the stator of the flat wire motor is simple, the end size is small, the resistance of the winding is reduced, the loss of the motor can be reduced, and the operation efficiency of the motor is improved. No welding point exists in the flat wire of each branch, so that the reliability of the winding can be improved.

The application discloses a kind of doped element modified casting aluminum alloy, preparation method and its application, the aluminum alloy is Al-Si-Mg-Cu as matrix, doping any one or more in La, Ce, Zn, and the mass ratio of doping element is 0.1%~1.9%.Preparation method includes raw material smelting, melt purification pouring, solid solution-ageing treatment, and the doped element modified casting aluminum alloy is obtained by using metal type gravity pouring, and then extrusion casting is made into structural member.The application realizes α-Al dendrite refinement and eutectic Si efficient modification by the synergistic effect of doping element, greatly improves the mechanical properties such as tensile strength and hardness of alloy, while maintaining excellent plasticity, and the matching of strength and plasticity is excellent, which can be used for preparing automobile lightweight castings, and solves the technical shortcomings of traditional casting aluminum alloy, such as coarse structure and insufficient matching of strength and plasticity.