108results about How to "Meet lightweight design requirements" patented technology

The invention discloses an image display apparatus. The image display apparatus comprises a display screen, and an ocular-side double-convex lens, a reflection element and a first achromatic lens which are disposed on an image light transmission optical path of the display screen, wherein the first achromatic lens is coaxially arranged with the ocular-side double-convex lens and is disposed at the light- emitting side of the ocular-side double-convex lens, an optical axis of the display screen and an optical axis of the ocular-side double-convex lens form a preset included angle, the reflection element is disposed between the display screen and the ocular-side double-convex lens, and image light is reflected on the reflection element, sequentially penetrates the ocular-side double-convex lens and the first achromatic lens, and then reaches a watching side so as to form a virtual image. The invention further discloses a head-mounted display device. According to the formed optical system, the system space volume can be reduced, compressed and amplified, a series of image errors such as coma, astigmation, aberration and the like can be improved, the magnitude of distortion is controlled, and under the condition that viewers can see amplified virtual images with excellent image quality, the requirements of a conventional head-mounted display device for miniaturization and light-weight design are satisfied.

The invention discloses a bipolar plate of a proton exchange membrane fuel battery. The bipolar plate comprises a first metal single plate, wherein the first metal single plate is provided with a plurality of first bosses at intervals, and a first groove is formed between any two adjacent first bosses; a second metal single plate is provided with a plurality of second bosses at intervals, and a second groove is formed between any two adjacent second bosses; the number of the first bosses is the same with the number of the second bosses, the first bosses correspond to the second bosses, the first bosses and the second bosses are respectively in a wave shape and are the same in the extending directions, and the bending direction of each first boss is opposite to the bending direction of eachsecond boss; a coolant flow field is formed between each first boss and the corresponding second groove, and an air flow field is respectively formed on each first groove and each second boss. The bipolar plate has the advantages that the air flow fields and the coolant flow fields are distributed in an embedding way, so that the thickness of the bipolar plate of the proton exchange membrane fuelbattery is greatly reduced, and the light-weight design requirement is met.

The invention relates to an onboard three-optical-axis consistency test component, system and method. The test component comprises a collimator, a beam splitter, a target plate, a CCD detector and a blackbody light source; the beam splitter, the target plate, the CCD detector and the blackbody light source are positioned at one end of the converging light entrance of the collimator; the target plate is positioned on the focal plane of the collimator; the blackbody light source is used for illuminating the target plate; the emergent light of the target plate reaches the converging light entrance of the collimator via the beam splitter; and the emergent light of the converging light entrance of the collimator reaches the CCD detector via the beam splitter. The test method comprises the stepsof 1, transferring a datum; 2, testing the drift angle of the optical axis of the laser light path via the CCD detector; and 3, testing the respective drift angles of the television light path optical axis and the infrared light path optical axis via the blackbody light source. According to the component, system and method provided by the invention, the problems that the existing test system andmethod are limited in accuracy, large in optical adjustment difficulty and not applicable to being onboard are solved.

The invention belongs to the technical field of laser communication, and particularly relates to a light and small airborne high-speed laser communication method. The method comprises the steps that 1, initial alignment is conducted between an airborne terminal and a foundation terminal; 2, open-loop capture is performed between the airborne terminal and the foundation terminal; 3, coarse trackingis carried out between the airborne terminal and the foundation terminal; 4, fine tracking is carried out between the airborne terminal and the foundation terminal, and a communication link is established; and step 5, two-way communication is realized between the airborne terminal and the foundation terminal. The method innovatively adopts an asymmetric single beacon and a rapid capture, alignment and tracking technology and has the advantages of miniaturization, high transmission rate and high anti-interference capability.

The invention provides sponge foaming rubber for a car door sealing strip and a preparation method thereof, a car door sealing strip and a preparation method thereof. The sponge foaming rubber for the car door sealing strip, provided by the invention, is prepared from the following components in parts by weight: 20 to 40 parts of ethylene-propylene-diene monomer 9090M, 69 to 92 parts of ethylene-propylene-diene monomer V8800, 5 to 7 parts of active zinc oxide, 1 to 2 parts of stearic acid, 1 to 3 parts of a dispersant, 0.8 to 1.4 parts of erucamide, 1 to 2 parts of PEG-4000 (Polyethylene Glycol-4000), 5 to 10 parts of POE (Polyolefin Elastomer), 60 to 77 parts of paraffin oil R-2291, 30 to 50 parts of carbon black N550, 50 to 70 parts of carbon black SP5000, 1.5 to 2.5 parts of sulfur S-80, 6 to 10 parts of a moisture absorbent GR, 3 to 6.4 parts of an accelerant, 3 to 3.6 parts of a foaming agent OBSH-75 (Oxydibenzenesulfonyl Hydrazide-75) and 1.1 to 1.5 parts of a foaming agent AC3000-75. By adopting a formula of the sponge foaming rubber for the car door sealing strip, provided by the invention, the prepared sponge rubber has relatively low density and can meet a lightweight design; meanwhile, the obtained rubber also can have relatively good physical performance, so that the utilization quality of the car door sealing strip utilizing the sponge foaming rubber can also be improved.

The invention relates to electric transmission systems of vehicles, in particular to an electric transmission system of a low-floor light rail vehicle. The problem that a traditional electric transmission system cannot adapt to a low-floor light rail vehicle is solved. The electric transmission system of the low-floor light rail vehicle electric comprises a high-voltage box, two traction auxiliary converters, a brake resistor box, a 24V storage battery and a traction storage battery. The high-voltage box comprises a main fuse, an isolating switch and a high-speed circuit breaker. Each traction auxiliary converter comprises a traction inverter, a smoothing reactor, a DC24V control power supply, an AC400V auxiliary inverter and a traction storage battery charger, wherein transformers included in the DC24V control power supply, the AC400V auxiliary inverter and the traction storage battery charger are high-frequency transformers. The high-voltage box, the traction auxiliary converters and the brake resistor box are all of box-type design with the height being no more than 530 mm. The electric transmission system has the characteristics of being high in integration degree, small in size, high in reliability, good in seismic resistance, high in protection grade, powerful in function and the like.

The invention relates to a battery liquid cooling plate structure and an automobile battery. The battery liquid cooling plate structure comprises a liquid cooling plate main body and a liquid inlet and outlet structure. The liquid cooling plate main body comprises an upper cooling plate and a lower cooling plate arranged side by side up and down, a plurality of partition plate ribs arranged between the upper cooling plate and the lower cooling plate at intervals, and a cooling cavity between the upper cooling plate and the lower cooling plate is divided into a plurality of cooling flow channels by the plurality of partition plate ribs. The liquid inlet and outlet structure comprises a liquid inlet plate structure and a liquid outlet plate structure which are arranged at the two ends of theliquid cooling plate body respectively, a liquid inlet cavity communicated with one end of the cooling flow channel is formed in the liquid inlet plate structure, and a liquid outlet cavity communicated with the other end of the cooling flow channel is formed in the liquid outlet plate structure; a liquid inlet head communicated with the liquid inlet cavity is arranged on the liquid inlet plate structure, and a liquid outlet head communicated with the liquid outlet cavity is arranged on the liquid outlet plate structure. According to the present invention, the processing technology of the battery liquid cooling plate is simplified, so that the liquid cooling plate meets the design requirement of light weight, and meanwhile, the cooling and heat dissipation performance of the liquid cooling plate is improved.

The invention discloses an optimization method for an outer windshield structure of a high-speed train, and the outer windshield structure. The optimization method comprises the following steps: defining an outer windshield structure design space according to the geometric boundary dimension of the section of an original outer windshield structure, performing topological optimization design on thedesign area to obtain a topological optimization design result, performing geometric reconstruction and modification on the topological optimization design result to obtain a topological optimizationouter windshield structure section, comparing the topologically optimized section of the outer windshield structure with the section of the original outer windshield structure for verification, if the section of the outer windshield structure meets the lightweight design requirement, finishing optimization, and if the lightweight design requirement is not met, returning to the geometric reconstruction and modification step for iterative design and comparative verification. According to the optimization method and the outer windshield structure, under the condition that the mass of an originalstructure is not increased, the transverse rigidity of the outer windshield structure is improved, the drag reduction effect of the installed outer windshield structure is better, the transverse deformation resistance is improved, and the lightweight design requirement of the outer windshield structure is met.

The invention relates to a composite material structure applicable to a point-connected spacecraft in the field of star-arrow connecting structures. The composite material structure comprises a force-bearing barrel lower end frame and reinforcing corner boxes, wherein the section of the force-bearing barrel lower end frame is F-shaped; the force-bearing barrel lower end frame mainly comprises an inclined plane, riveting holes, a flanging flange and connecting flanges; the section of the reinforcing corner boxes is L-shaped; riveting holes are formed in the reinforcing corner boxes; the reinforcing corner boxes are riveted to the inclined plane of the lower end frame; the sections of the reinforcing corner boxes are fitted to the surfaces of the inclined plane and the connecting flanges. The composite material structure meets a lightweight design requirement of a force-bearing barrel of a new-generation Mars probe structural platform in China and also guarantees the connecting strengthand the connecting rigidity during connection with a carrier.

The invention relates to the inversion power module and particularly relates to a three-phase inversion power module based on a two-way spiral flow channel water cooling heat radiation substrate. The three-phase inversion power module based on the two-way spiral flow channel water cooling heat radiation substrate solves problems that a present heat radiation flow channel is not reasonable, poor in heat radiation, big in size and weight and not easy to perform fast plug-pull installation. In the scheme of the three-phase inversion power module based on the two-way spiral flow channel water cooling heat radiation substrate, a three-phase inversion power circuit is arranged on the two-way spiral flow channel water cooling heat radiation substrate; a T-shaped composite mother board and a drive board are stacked on the two-way spiral flow channel water cooling heat radiation substrate; a support seat is arranged in the front edge of the two-way spiral flow channel water cooling heat radiation substrate; water connectors and fixed blocks are arranged on two sides of the two-way spiral flow channel water cooling heat radiation substrate; and screw rods and a handle go through the fixed blocks. The advantages of the three-phase inversion power module based on the two-way spiral flow channel water cooling heat radiation substrate has advantages that flow resistance of a cooling liquid is small and heat radiation is uniform; the water connectors are easy to mount and dismount without affecting processing accuracy; and the layout is not affected by the flow channel; circuit electric inductance is small and working reliability of a thermal performance power module is high. Furthermore, the three-phase inversion power module based on the two-way spiral flow channel water cooling heat radiation substrate is compact in layout, small in volume and light in weight, saves cost; the interfaces are preposed in sequence, which is easy to maintain and saves external fast connection device; and a driving signal is high in anti-interference.

The invention discloses a torsion resistant pull rod of a power assembly. The torsion resistant pull rod comprises a pull rod bracket, a large liner bushing and a small liner bushing, wherein the large liner bushing and the small liner bushing are respectively arranged at two ends of the pull rod bracket; the large liner bushing comprises a large liner bushing inner pipe; and the small liner bushing comprises a small liner bushing inner pipe. The torsion resistant pull rod is characterized in that the upper surface of the pull rod bracket is a flat end surface; the central axis of the small liner bushing inner pipe is parallel to the upper surface of the pull rod bracket; an oblique obtuse angle is formed between the central axis of the large liner bushing inner pipe and the upper surface of the pull rod bracket; when one end of the pull rod bracket is connected with the power assembly through the small liner bushing, an oblique acute angle is formed between the upper surface of the pull rod bracket and a level surface; and the difference between the oblique obtuse angle and the oblique acute angle is 90 degrees. The torsion resistant pull rod disclosed by the invention has the advantages that after the pull rod bracket of the torsion resistant pull rod is mounted in a preset angle, the upper surface or the lower surface of the large liner bushing inner pipe can be mounted on a vehicle body or a sub vehicle frame in a flat clinging manner, so that the mounting stability and the whole using stability of the torsion resistant pull rod are guaranteed.

The invention relates to a light steel floor system structure of a fabricated building. The light steel floor system structure comprises a light steel floor system, I-shaped inserting blocks arrangedat four corners of the bottom end of the light steel floor system, and prefabricated mounting seats which are mounted on a building base body or supporting columns and correspond to the I-shaped inserting blocks in position, and the I-shaped inserting blocks are matched with the prefabricated mounting seats; and protruding blocks are arranged on the two adjacent side walls of the light steel floorsystem, grooves matched with the protruding blocks in shape are formed in the other two side walls of the light steel floor system, and every two adjacent light steel floor systems are connected through matching between the protruding blocks and the grooves. According to the adopted light steel floor system structure, the construction period is short, the construction efficiency is high, the assembly type structural design is adopted, mounting is convenient, the mounting precision is high, floor systems are in close fit, gaps are small, and the structure is firm.

The invention discloses a method for manufacturing a radiator and the radiator. The method comprises the following steps of: processing polygonal or circular radiating guide posts on a shell of the radiator, simultaneously processing radiating fins on the edge of the shell, connecting the radiating fins and the radiating guide posts on the edge, and drilling deep holes in the centers of the radiating guide posts to enlarge the radiating surface area of the shell and lighten the weight of the shell; and processing polygonal or circular radiating guide posts on a cover plate of the radiator, and drilling deep holes in the centers of the radiating guide posts to enlarge the radiating surface area of the cover plate and lighten the weight of the cover plate. By skillfully combining the radiating fins and the radiating guide post and greatly enlarging the outer surface area of the radiator, the method improves the convection and heat radiation capabilities of the radiator at the same time of lightening the weight so as to greatly promote the radiating capability of the radiator and realize the miniaturization and lightweight design requirements of high-power electronic equipment products.

The invention relates to a structure optimization design method of a machine tool component, in particular to a key host component structure optimization design method based on a machine tool workingstate. The method comprises the following steps: A, performing multi-working-condition topological optimization based on a machine tool motion state; B, parameterization reconstruction is carried outon the geometric model combined with the optimized topological structure; C, optimizing the shape and the size based on multiple working conditions of the machine tool in the motion state; D, performing production state evaluation based on machine tool machining and assembling conditions. The method is not limited to an assembly structure needing to be optimized, but comprehensively considers complete machine mounting structures such as the motion connecting piece and the supported piece, and fully considers various motion states and various working conditions of the machine tool, so that theoptimized design index is closer to the actual working state of the machine tool, and the optimized structure is higher in reliability.