3results about How to "Strong thrust" patented technology

The present application relates to the technical field of spacecraft propulsion system, and more particularly to a micro-newton hybrid mode propulsion system and method based on gas working substance. The system comprises a gas storage unit, a gas supply unit, a thruster unit and a propulsion system driving and control unit. The gas storage unit adopts symmetrically arranged high-pressure gas cylinders connected through high-pressure isolation valves, and in combination with the automatic balancing strategy of the control unit, effectively solves the problem of on-orbit centroid drift. The gas supply unit includes parallel cold gas propulsion branches and electric propulsion branches, and each branch adopts a mechanical pressure reducer to eliminate vibration and noise caused by electromagnetic valve action from the source, realizing super-static operation of the system. The propulsion system driving and control unit controls the micro-newton cold gas thruster and the micro-newton electric thruster to work alone or in cooperation according to the distribution strategy based on the thrust critical point, realizing the optimal comprehensive efficiency of high precision and high specific impulse in the full thrust range, and being suitable for ultra-high precision space scientific exploration missions.

The application belongs to the technical field of robots, and discloses a scalable amphibious robot driven by a paddle wheel, which comprises a shell, four wheel shafts rotatably connected to the shell and distributed on the left and right sides of the shell, four independent driving mechanisms arranged in the shell, four driving mechanisms connected with the four wheel shafts to drive the wheels to rotate independently, a scalable paddle wheel mechanism contained in the wheel mechanism, the scalable paddle wheel comprising a wheel, an independent small wheel body, a plurality of paddle plates and a scalable mechanism; the scalable mechanism is used for the expansion and contraction of the paddle plates of the paddle wheel, so that the paddle plates of the paddle wheel can be retracted into the wheel and form an integral whole with the wheel, or be expanded into a paddle wheel mechanism and be used for rowing. The single power driving system is combined with the scalable paddle wheel structure, so that the rigidity and flexibility of the hub are ensured when the amphibious robot runs on land, and the energy utilization efficiency is improved when the amphibious robot sails on water.

The utility model discloses an orthodontic dentition forward-moving push spring device, which relates to the technical field of orthodontic instruments, and comprises a bracket seat, a fixed seat, a connecting plate and an adjusting plate, the surface of the fixed seat is provided with a threaded hole, the surface of the connecting plate is fixedly connected with a threaded seat I, one side of the adjusting plate is fixedly connected with a threaded seat II, and the other side of the adjusting plate is fixedly connected with the threaded seat II. A push spring is fixedly connected between the two adjusting plates, a through hole is formed in the middle of the fixing seat, an orthodontic wire is slidably connected to the inner wall of the through hole in a penetrating mode, and the orthodontic wire penetrates through the interior of the push spring to provide basic supporting force for tooth orthodontics. The problems that after a traditional orthodontic push spring device is installed, the push force of a push spring cannot be flexibly adjusted, in the orthodontic process, the distance between the two ends of the push spring becomes large after teeth slightly displace, the push force of the push spring is reduced, and the subsequent orthodontic effect becomes poor are solved.