3results about How to "Uniform stiffness" patented technology

The application discloses a steam turbine moving blade root weight-reducing structure, a steam turbine moving blade and a manufacturing method thereof. The steam turbine moving blade root weight-reducing structure comprises a fir-type blade root and a blade root intermediate body connecting a blade body and the fir-type blade root, and a weight-reducing groove is arranged on the inner arc side of the blade root intermediate body. The opening area of the weight-reducing groove accounts for 60%-40% of the area of the inner arc side without the weight-reducing groove. After the assembly of adjacent blades is completed, the contact area of the inner arc side of the blade root intermediate body accounts for 40%-60% of the contact area of the inner arc side of the blade root intermediate body without the weight-reducing groove. The application has the advantages that the average stress level of the blade root area can be effectively reduced, the manufacturing cost of the blade is reduced, the processing difficulty of the blade is not increased, the blade root weight can be reduced, the strength and rigidity of the blade root can be effectively ensured, and the like.

This invention relates to the field of sound insulation technology and discloses a foamed aluminum-gypsum composite partition wall with high sound insulation performance. It employs a five-layer symmetrical composite structure: fire-resistant gypsum board, damping sound-insulating adhesive layer, gradient-pore-sized open-cell foamed aluminum core layer, damping sound-insulating adhesive layer, and fire-resistant gypsum board. Because the foamed aluminum core layer and fire-resistant gypsum board are bonded with environmentally friendly polyurethane structural adhesive and fixed with C-shaped cold-rolled galvanized light steel keel, the interlayer bonding is ensured to be firm and the overall rigidity uniform, preventing delamination and deformation during use. The partition wall joints utilize a double-sealing process of sealant and grooves. Internal flame-retardant sealant fills the gaps to block sound bridges and smoke passages, while external U-shaped PVC grooves combined with butyl rubber sound-insulating pads achieve full enclosure, improving long-term stability. It also boasts advantages such as lightweight, high strength, convenient construction, and good durability.

The application discloses a kind of composite fabric with double-sided hetero-functional and preparation method thereof, adopt the three-layer composite structure of first functional layer, intermediate layer, second functional layer from inside to outside in turn, interlayer is connected by adhesive, through the synergistic effect of double-charge surface and adhesive of intermediate layer, interlayer bonding is reinforced by electrostatic attraction direction, simultaneously charge repulsion effect blocks anion hydrophobic agent and cationic hydrophilic agent molecule mutual penetration, avoid function mutual interference;When the deformation of concave quadrilateral negative poisson's ratio structure, intermediate layer flexible base cooperates controllable gap deformation to absorb stress, prevent interlayer peeling or functional layer wrinkle, charge layer also keeps stable distribution due to electrostatic constraint;Finally realize the synergistic effect that structure stiffness is uniform under dynamic deformation, interlayer peeling strength is significantly improved, and the dual needs of structure stability and function reliability in dynamic scene such as intelligent wearing are considered.