2results about How to "Ease the temperature" patented technology

The application discloses a composite steel pipe single pile filled with recycled building materials and a construction method thereof, and belongs to the technical field of steel pipe piles. The composite steel pipe single pile comprises a steel pipe pile body, a cavity is arranged in the steel pipe pile body, the cavity is used for filling recycled building materials, a plurality of interface connecting mechanisms are arranged in the cavity, and a sealing mechanism is arranged on the top surface of the steel pipe pile body. By constructing a steel-filling core composite cross-section structure, the cross-section inertia moment and the overall bending stiffness are improved, the pile top displacement and bending deformation can be effectively reduced under the action of horizontal load, the single pile horizontal bearing capacity is improved by optimizing the cross-section stress system under the condition of controlling the steel consumption, and the structural material utilization efficiency is improved. The collaborative working capacity between the steel pipe and the filling body is enhanced through the interface connecting structure, the overall stress performance of the composite structure is improved, the air retention space in the steel pipe is reduced by filling the recycled building materials, the temperature and humidity fluctuations are alleviated, and the internal service environment is improved.

The invention discloses an external rotor motor for an eVTOL aircraft. A stator fixing shaft is arranged in the motor, a stator is arranged on the fixing shaft, the stator adopts a tooth yoke separation structure, and a 3D printing integrated welding-spot-free variable cross-section flat wire winding is arranged in a slot, so that the slot fullness rate of the motor is increased, and the efficiency of the motor is improved; a rotor is arranged outside a stator, a magnetism gathering type Halbach permanent magnet pole is arranged on the rotor, a shell, a front end cover and a rear end cover are arranged outside the rotor, one end of a fixing shaft is connected with a fairing through a fairing bearing, the fairing is fixedly connected with the front end cover, blades are arranged outside the fairing, an airflow channel is formed in the fairing, and a plurality of spiral channels are formed in the stator. The airflow channel is communicated with the spiral channel; when the motor is started, the blades and the shell rotate at the same time, and wind is driven to enter the motor, pass through the spiral channel and flow out of the channel in the fixed shaft. The stator spiral channel greatly increases the cooling area of the stator core, reduces the stator temperature rise of the external rotor motor, and effectively alleviates the problems of winding temperature and stator hot accumulation.