4results about How to "Strong repulsion" patented technology

The invention relates to the technical field of all-vanadium redox flow batteries, in particular to a covalent organic framework cross-linked sulfonated polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane structurally comprises a polymer main chain, a sulfonic acid group, a connecting agent and a cross-linking agent molecule, a sulfonated polybenzimidazole polymer, a COF cross-linking agent and the connecting agent are dissolved in N-methyl pyrrolidone, and the COF cross-linked sulfonated polybenzimidazole proton exchange membrane is obtained after treatment. Aiming at the problems that vanadium ions of a positive electrode and a negative electrode of an all-vanadium redox flow battery are crossed, the capacity of the all-vanadium redox flow battery fades and the energy efficiency is low, the hydrophilicity of the sulfonated polybenzimidazole proton exchange membrane is improved through sulfonation treatment, and the mass transfer resistance is reduced. After the covalent organic framework is introduced, the increased free volume is beneficial to construction of a rapid proton transmission channel and can accommodate water molecules to limit swelling of the membrane material.

The invention discloses an air magnetic spring with a cooling function, and belongs to the technical field of elastic elements. The device comprises an upper cover plate, a lower base and a main rubber air bag, and is characterized in that an upper auxiliary rubber air bag, a lower auxiliary rubber air bag, an upper magnetic ring and a lower magnetic ring are additionally arranged, the auxiliary rubber air bag is fixed to the center of the upper cover plate and the lower cover plate and located in the main air bag. The magnetic rings are embedded in the cover plates and pressed by the auxiliary air bag. And communicated cooling water channels are arranged in the upper cover plate, the lower cover plate and the auxiliary air bag. When the main air bag loses efficacy, the auxiliary air bag provides emergency buffering, and double failure protection is achieved in combination with repulsive force of the magnetic ring; under extreme impact, the repulsive force of the magnetic ring can enhance the breakdown resistance; the cooling water channel can effectively reduce the working temperature of the spring and delay rubber aging. The spring integrates the functions of failure protection, strong impact resistance and active cooling, and the reliability and environmental adaptability are remarkably improved.

The utility model relates to a kind of magnetic levitation self-air dry cup pad, including felt cup pad, suspension module and annular base, suspension module is fixed in the inside center of felt cup pad, suspension module adopts full seal design and inside is monopole magnet structure, suspension module center is equipped with through-hole, annular base top is equipped with hollow stainless steel column, hollow stainless steel column inside is embedded cylindrical neodymium magnet, the polar direction of cylindrical neodymium magnet is same with the magnetic pole of suspension module, suspension module is through the through-hole of its center and is inserted into hollow stainless steel column, felt cup pad uses recyclable wool felt material, suspension module is combined by heteropolar neodymium magnet and large metal disc, so that the upper and lower surfaces of suspension module present same magnetic pole, suspension module outer layer is sealed using biodegradable plastic sealing layer;Compared with prior art, the utility model can realize automatic air drying, environmental protection and has interesting and healthy concept, solve the problem of inconvenience, single function and poor environmental protection after traditional cup pad cleaning.

The utility model discloses a magnetic shock absorber which comprises a fixed sleeve, a movable shock absorption assembly and a fixed shock absorption element, a first magnetic element is arranged at the lower end of the movable shock absorption assembly, a second magnetic element is arranged at the upper end of the fixed shock absorption element, and the movable shock absorption assembly is movably arranged in the fixed sleeve in a penetrating mode. The fixed damping element is fixedly connected into the fixed sleeve, and the magnetic poles of the corresponding faces of the first magnetic element and the second magnetic element are the same. By adopting the principle that like poles of the first magnetic element and the second magnetic element repel each other, when the movable damping assembly is stressed and pressed downwards, the spring is pushed to press downwards, so that the first magnetic element moves downwards to be close to the second magnetic element, and repulsive force is continuously increased in the approaching process, so that the damping effect is improved. The fixed sleeve can enable the movable damping assembly to move in the sleeve, and the movable damping assembly is prevented from swinging when being stressed and pressed downwards. The device is simple in structure and convenient to use, and can be applied to the fields of motor automobiles, motorcycles, bicycles, electromechanical equipment and the like.