11results about How to "Avoid partial failure" patented technology

The invention relates to the technical field of semiconductor laser manufacturing. The invention particularly relates to a semiconductor laser chip structure and a manufacturing method thereof. The semiconductor laser chip structure provided by the invention comprises a laser substrate and a heavily doped table, and the heavily doped table is arranged on the surface of one side, opposite to a substrate layer, of an upper limiting layer of the laser substrate and comprises a first ohmic contact layer, a second ohmic contact layer and a resistance control layer; the heavily doped table is provided with a current injection region, and is provided with a first current injection window and a second current injection window; a current path from the first current injection window to the substrate layer does not pass through the resistance control layer, and a current path from the second current injection window to the substrate layer passes through the resistance control layer; the second current injection window is at least arranged on one side of the current injection region close to the rear cavity surface. According to the semiconductor laser chip structure provided by the invention, carrier injection of the front cavity surface and the rear cavity surface can be effectively balanced, so that local failure of the front cavity surface is avoided, and the device efficiency can be improved.

The utility model relates to fan transmission system technical field, and disclose a kind of assembly impeller, including impeller and main shaft, the detachable connection between the impeller and main shaft, at least two symmetrical distribution's protruding tooth is processed in the main shaft end face;The recess matched with the protruding tooth is opened in the impeller body end face, and torque is transferred by the side surface contact of the protruding tooth and recess;The utility model is matched by protruding tooth and recess, and contact area is big, can effectively disperse torque, reduce local stress concentration;Symmetrical distribution's protruding tooth makes stress more balanced, avoids the local failure caused by structural deviation.

The utility model relates to fresh hanging tag technical field especially is a kind of fresh hanging tag price tag, including hanging tag main part, the top of hanging tag main part is equipped with semicircular hanging hole, the front of hanging tag main part is equipped with horizontal information column, and the hanging tag main part is the three-layer composite structure that by outer layer, middle layer and inner layer are sequentially superimposed and integrally hot-pressed, wherein outer layer is the weather-resistant film layer of printable information, middle layer is microporous breathable layer, and inner layer is cold chain indicating layer, the utility model is by the cooperation of inner layer and condensate area plus the flow guide groove of color-changing ink, this hanging tag is exposed and automatically occurs irreversible color change, consumer does not need to scan code or to tear bag to judge whether fresh experiences over-temperature by naked eye, significantly reduce the food safety risk caused by cold chain break.

The utility model discloses a multi-stage energy dissipation self-floating type ship collision prevention device, and relates to the technical field of bridge collision prevention. The floating energy dissipation device comprises a first floating energy dissipation mechanism and a second floating energy dissipation mechanism which can float on the water surface and are connected with each other through a connecting frame. The second floating energy dissipation mechanisms sleeve the periphery of the pier at intervals, the first floating energy dissipation mechanisms are arranged around the second floating energy dissipation mechanisms, and the first floating energy dissipation mechanisms and the second floating energy dissipation mechanisms can slide relative to the connecting frame. Each connecting frame is provided with two sets of energy dissipation pieces, one set of energy dissipation pieces is located between the first floating energy dissipation mechanism and the connecting frame, the other set of energy dissipation pieces is located between the second floating energy dissipation mechanism and the connecting frame, and the rigidity of the two levels of floating energy dissipation mechanisms is larger than that of the energy dissipation pieces. When the ship collides, the first floating energy dissipation mechanism deviates inwards and sequentially extrudes the energy dissipation pieces at all levels and the second floating energy dissipation mechanism, step-by-step energy dissipation is achieved, and the collision energy is absorbed to the maximum extent. Compared with the prior art, the damage risk of ship collision to the bridge structure can be effectively reduced.

This invention relates to the technical field of polyurethane prepolymer waste gas treatment, and more particularly to a polyurethane prepolymer waste gas treatment device, comprising a buffer tank, a pressure equalization plate disposed inside the buffer tank, the pressure equalization plate having uniformly distributed through holes; a first diverter disposed at the top of the buffer tank, with a first collection box connected to the bottom of the first diverter, a second diverter connected to one side of the first diverter, and a second collection box connected to the bottom of the second diverter; both the first diverter and the second diverter are conical cylinders, with the second diverter having a smaller diameter; the actual accumulation of condensate is detected by a float in a float detection box; when the float rises, it drives a moving part to move via a connecting rod, causing the first outlet to gradually open and the second outlet to gradually close, automatically switching the waste gas from directly entering the adsorption tank to first being sprayed and washed by a spray ring before entering the adsorption tank.

The utility model discloses a shell of a battery cell, the battery cell, a battery pack and a vehicle, the shell is provided with an accommodating cavity, and the accommodating cavity is used for accommodating electrolyte; a diffusion groove is formed in the inner wall of the shell and used for diffusing the electrolyte. The diffusion groove is formed in the inner wall of the shell of the battery cell and is used for diffusing the electrolyte, so that the electrolyte is diffused along the extension direction of the diffusion groove, the diffusion rate of the electrolyte is improved, the contents of all components in the electrolyte at all positions of the battery cell are basically the same as much as possible, the phenomenon of local failure of the battery cell is prevented, and the service life of the battery cell is prolonged. And the actual service life of the battery cell is prolonged.

The utility model discloses a white pad for wafer rough polishing belongs to the technical field of polishing pad, a white pad for wafer rough polishing, including polishing pad layer, the upper end of polishing pad layer is provided with fluid storage pad, the upper end sealed coupling of fluid storage pad has base surface layer, the inside of fluid storage pad is provided with integrative fluid flow cavity, and the inside of fluid flow cavity has non - newtonian fluid layer. The utility model solves the problem that the existing wafer grinding pad in actual use process, and the partial buffer invalidation of polishing pad caused by the breakage of micro air bag will affect the continuity work, the non - newtonian fluid layer of the utility model in the grinding process, and the viscosity changes with the real - time change of pressure, shear rate, realizes adaptive buffer, reduces the wafer edge collapse response speed that partial stress concentration leads to, and the action of cooperation grinding particle can reduce partial leakage, and the surface uniformity is promoted.

The invention relates to the technical field of food fresh keeping, and particularly discloses a composition with an antibacterial function, a preparation method and application in fresh keeping of hot fresh meat, the preparation method comprises the following steps: (S01) taking lactobacillus plantarum, lactobacillus reuteri and fructo-oligosaccharide, mixing, stirring, setting constant temperature, and adjusting humidity to obtain an antibacterial matrix; (S02) mixing sodium alginate with the bacteriostatic substrate, stirring, and adjusting the pH value to obtain a bacteriostatic structure substrate; (S03) adding a grape seed extract, adjusting the stirring speed and duration, measuring the concentration data of each component, and testing the solubility to obtain a functional antibacterial component; and (S04) adopting principal component analysis, gradually adjusting the proportion of each component, judging the influence of different proportions on bacterial colony inhibition by monitoring and analyzing the number of bacterial colonies and the inhibition rate, and obtaining an optimal proportion combination according to experimental data to obtain a preparation scheme of the composition with the antibacterial function. The invention has the characteristics of being beneficial to maintaining the health and balance of intestinal microecology, good in safety and better in stability.

The invention discloses an integrally-formed flexible vapor chamber which comprises an upper-layer flexible raw material and a bottom-layer composite raw material metal net layer, and a plurality of flexible keel assemblies are arranged between the upper-layer flexible raw material and the bottom-layer composite raw material metal net layer. A heat conduction fixing block is further arranged, a composite raw material metal net block is fixed to the bottom of the heat conduction fixing block, the two ends of the composite raw material metal net block are connected with capillary liquid absorption cores, and the capillary liquid absorption cores are tightly attached to the bottom composite raw material metal net layer. The invention has the technical effects and advantages that: 1, the structure is formed by using a brand new scheme, can be randomly folded at 180-360 degrees, and is flexible VC, and the used raw materials meet the positively advanced environmental protection demands of various countries, and are low-carbon and environment-friendly; and 2, batch production is realized, the structure is simple and easy to understand, the yield is high, and the method is suitable for large-scale mass production operation. And 3, the yield is high, and additional detection means or detection equipment and subsequent processing are not needed, so that the overall cost of the product is reduced, and the product has certain competitiveness in the market.

The invention discloses a layered soft rock tunnel asymmetric large deformation control support system and a construction method thereof. The layered soft rock tunnel asymmetric large deformation control support system comprises a sprayed concrete primary support, a polyethylene plate buffer layer, a sprayed concrete reinforcing layer and a reinforced concrete secondary lining which are sequentially arranged in the radial direction of a tunnel from outside to inside. The polyethylene plate buffer layer comprises a plurality of polyethylene plates, one sides of the polyethylene plates are symmetrically arranged on the surface of the sprayed concrete primary support, the sprayed concrete reinforcing layer is provided with steel bar grids and sprayed concrete, the steel bar grids are arranged on the other sides of the polyethylene plates, and the sprayed concrete is arranged on the exposed surface of the polyethylene plate buffer layer. And the reinforced concrete secondary lining is molded reinforced concrete. The method is simple in design and convenient to construct, mechanical operation is easy, the problem of stress concentration caused by asymmetric large deformation is effectively counteracted, and the overall stability and durability of the tunnel are improved.

The invention provides a bearing type metal structure frame for a sightseeing vehicle, and belongs to the technical field of sightseeing vehicle frames, the bearing type metal structure frame for the sightseeing vehicle comprises a chassis main beam, a transverse reinforcing beam, a longitudinal supporting column, a top cross beam and a damping assembly; the chassis main beam comprises two I-shaped main beams which are symmetrically arranged left and right, and the two I-shaped main beams are fixedly connected through a plurality of groups of transverse reinforcing beams; the transverse reinforcing beam is of an I-shaped structure, and the two ends of the transverse reinforcing beam are welded and fixed to a lower flange plate of the I-shaped main beam; the problems that the overall strength and rigidity of a frame are often not uniform enough, a stress concentration area exists in the frame due to the limitation of the welding technology and the structural layout, and local deformation or fracture failure is prone to occurring can be solved; the dead weight of a vehicle frame is too large, the load and endurance performance of the sightseeing vehicle is limited, the damping performance is poor, road vibration cannot be effectively isolated, and the riding experience of passengers is affected; and the whole appearance modeling is simple, and the aesthetic property and personalized design are lacked.