11results about How to "Promote lightweight development" patented technology

The invention discloses a preparation method of nodular cast iron for axle housing castings. The nodular cast iron comprises the following raw materials: 10-30% of pig iron, 30-60% of scrap steel and 15-40% of foundry returns. 1.5%-2.5% of a carburant and 1.5%-2.0% of 75 ferrosilicon; the preparation method comprises the following steps: preparing the following components in percentage by weight: 0.4%-0.8% of electrolytic copper, 0.1%-0.4% of a silicon carbide pretreating agent, 0.8%-0.95% of an Mg30-containing spheroidized core-spun yarn and 0.2%-0.6% of 0.05% to 0.15% of an Ikine 958 stream inoculant; and through the arrangement of the pretreatment step, the metallurgical reaction is more sufficient, the molten iron is pretreated, and preparation can be better made for subsequent spheroidizing treatment. According to the single-wire feeding spheroidizing method, the spheroidizing process and the inoculation process are separated, the waiting time between spheroidizing cored wire feeding and inoculation treatment is saved, the wire feeding time is shortened, and the production cost is reduced. And the spheroidizing ladle is additionally arranged between the smelting furnace and the pouring ladle, so that the reaction is more sufficient, and the production efficiency is improved. The nodular cast iron prepared by the method is good in comprehensive performance, the preparation cost is reduced, and an axle housing cast by the nodular cast iron is good in mechanical performance and long in service life.

The invention provides a fan movement assembly and an air conditioner, relates to the technical field of air conditioners, and solves the technical problems that in the prior art, a fan is arranged between at least two air ports, air is supplied to the at least two air ports through an air supply component, and the air supply distance is long, so that the air volume loss is large, and noise and vibration are likely to be generated. The fan movement assembly and the air conditioner comprise a reciprocating movement assembly, a fan is arranged on the reciprocating movement assembly, and the reciprocating movement assembly drives the fan to reciprocate between at least two air outlet positions; and the overturning assembly is arranged between the fan and the reciprocating moving assembly and used for driving the fan to overturn by a preset angle, so that the air outlet direction of the fan faces the air outlets of the at least two air outlet positions. According to the fan movement assembly and the air conditioner, short-distance air supply can be guaranteed, the air volume and performance of the whole machine can be improved, and lightweight development of the whole machine is facilitated.

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 field of solid rocket engine design, and provides a single-chamber double-thrust solid rocket engine charging structure which is installed in an engine combustion chamber shell and above a heat insulation layer and is composed of a coating layer, boosting-stage charging and endurance-stage charging, the coating layer coats the outer side of a boosting-stage charging cavity and the outer side of an endurance-stage charging cavity, and the boosting-stage charging cavity and the endurance-stage charging cavity are communicated with each other. The boosting-level charge is arranged at one end, close to a spray pipe, in an engine combustion chamber, the endurance-level charge is arranged at the other end, away from the spray pipe, in the combustion chamber, an air layer is arranged between the boosting-level charge and the endurance-level charge, and the boosting-level charge and the endurance-level charge do not make direct contact with each other. The boosting-level charging structure and the endurance-level charging structure are arranged in the mode that end-burning grains are embedded into a net array structure. According to the invention, through organic combination of the full-filling end combustion charging technology and the embedded net array speed control technology, the requirements of the maximum filling ratio and low-thrust long-time working are met, the negative mass of an engine is reduced, the safety requirement and the use risk of the engine are met, and the development of miniaturization and light weight of weaponry is effectively promoted.

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.

The invention relates to the technical field of railway vehicles, and provides a bogie and a railway vehicle. The bogie comprises a framework and a central traction device, the framework comprises a bearing main body and two plate springs, a central pin channel is formed in the middle of the bearing main body, and two mounting channels are formed in the bearing main body in the longitudinal direction of the framework; the two plate springs are installed in the two installation channels correspondingly. The central traction device is installed in the central pin channel and comprises a traction beam, a pin sleeve, a central pin and a connecting rod, the traction beam is provided with an assembly channel in the height direction, the outer surface of the traction beam is provided with a connecting part, the pin sleeve is installed in the assembly channel, and a pin hole and two free gaps are formed in the pin sleeve in the height direction; the two free gaps are located on the two sides of the pin hole respectively, the center pin is installed in the pin hole, one end of the connecting rod is connected with the connecting part, and the other end of the connecting rod is suitable for being connected to a framework.

The utility model relates to a PCBA board vertical installation structure, and belongs to the technical field of PCBA board installation structures, and the PCBA board vertical installation structure comprises a housing which is internally provided with an installation groove, and the installation groove is vertically arranged; the ribs are arranged on the inner side wall of the mounting groove, and the inner sides of all the ribs define a containing space; the PCBA board body is arranged on the inner side wall of the containing space in an attached mode. A guide inclined surface is arranged at the upper end of the rib, and the guide inclined surface is inclined downwards from one end far away from the accommodating space to one end close to the accommodating space. According to the invention, the installation structure of the PCBA board can be optimized, the internal layout of the product shell is effectively improved, and the lightweight development of the product is facilitated; besides, the PCBA board body is separated from the inner wall and the bottom wall of the mounting groove by a certain distance through the ribs and the bottom ribs, heat accumulation generated when the PCBA board body works is prevented, and it is guaranteed that the mounting structure has a good heat dissipation effect.

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.

The invention relates to the technical field of railway vehicles, and provides a trailer bogie and a railway vehicle, and the trailer bogie comprises a framework and a wheel set system. The framework comprises a bearing body and two plate springs, a center pin channel is formed in the middle of the bearing body, two installation channels are formed in the bearing body in the longitudinal direction of the framework, and the two plate springs are installed in the two installation channels respectively. The wheel set system comprises a shaft core, a shaft sleeve and two wheels, the shaft core is rotationally installed in the shaft sleeve, the two wheels are installed at the two ends of the shaft sleeve through bearings respectively, the two wheels are connected with the two ends of the shaft core through flexible plates respectively, a brake mechanism is constructed on the shaft sleeve, and the brake mechanism is arranged on the shaft sleeve. And the brake mechanism is in transmission connection with the shaft core and is used for driving the shaft core to brake. And the bearing main body and the plate spring replace the original cross beam and side beam structure, so that the lightweight effect of the framework is obvious.