3results about How to "Reduce Power Noise" patented technology

The utility model discloses a low-noise cross-flow cooling tower which comprises a tower body, a controller fixedly connected to the upper portion of the tower body, fan blades rotationally connected to the upper end of the controller, a shell fixedly installed at the outer ends of the fan blades, and a sound insulation cover fixedly connected to the outer end of the shell. A fixing plate is fixedly mounted on the outer side of the sound insulation cover, and a buffer spring is fixedly connected to the lower end of the fixing plate; the mounting plate is fixedly connected to the inner wall of the tower body, a groove is fixedly formed in the upper end of the mounting plate, a buffer plate is fixedly connected to the front end of the mounting plate, and sound-absorbing cotton is fixedly mounted in the buffer plate, so that the problems that impact noise is generated by impact force of flow on the inner wall of the tower body in the background technology, and noise is caused are solved; and the fan rotates to exhaust hot air in the cooling tower, and when the fan is started, the fan vibrates to generate a large amount of noise, so that eardrums of workers are damaged subsequently.

The utility model discloses a wind driven generator blade with a noise reduction structure, which comprises a fixed base and a fixed column fixed on the fixed base, the fixed base is rotatably connected with a generator cabin through the fixed column, and the side surface of the generator cabin is rotatably connected with a blade hub. Three blades are rotationally connected into the blade hub through a rotating shaft, each blade comprises a blade shell, a rail groove is formed in the side face of each blade shell, and a set of air knives are movably connected into each rail groove; by means of the equipment, air flow can be disturbed and adjusted, energy of turbulent flow and vortex can be reduced, therefore, generation of aerodynamic noise is reduced, meanwhile, the operation efficiency and environment friendliness of the wind driven generator can be improved, the effect of pre-starting of the blades can be achieved, it is ensured that wind energy is safely and efficiently utilized for power generation, and the wind power generation efficiency is improved. And meanwhile, the blade tip cover which is easy to damage can be quickly replaced, so that the whole blade is prevented from being replaced.

The utility model discloses a portable heart sound pulse wireless synchronous acquisition device, including the casing, be equipped with battery, microcontroller and signal acquisition board in the casing, microcontroller installs on the signal acquisition board, and battery electricity is connected to the signal acquisition board, and the front side of casing is embedded with heart sound sensor interface and pulse sensor interface, and heart sound sensor interface is detachably electrically connected with heart sound sensor, and pulse sensor interface is detachably electrically connected with pulse sensor, and the front side of casing is still embedded with power switch and power indicator, and the right side of casing is embedded with charging interface and charging indicator, the utility model discloses simple and easy integration structure design, wireless synchronous acquisition heart sound pulse signal, realized the synchronous acquisition of heart sound and pulse signal, utilize pulse signal auxiliary heart sound signal and carry out multimode analysis diagnosis, improve the accuracy rate of congenital heart disease diagnosis, expand the diagnosis type range of congenital heart disease and cardiovascular disease, further reduce the misdiagnosis because of the subjective consciousness of doctor.