4results about How to "Avoid partial failure" patented technology

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 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 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.