4results about How to "Increase effective power" patented technology

The invention relates to a lightweight lithium battery brushless multi-purpose saw which comprises a machine shell, the machine shell of the multi-purpose saw is made of magnesium alloy, a thin-wall part and a thick-wall part of the machine shell are manufactured and machined through a hot chamber die-casting method and a cold chamber die-casting method respectively, and the technological parameters of the magnesium alloy machine shell are controlled as follows: the preheating temperature of a magnesium alloy ingot is 130-190 DEG C, and the pouring temperature of magnesium alloy liquid is 610-660 DEG C. The light-weight lithium battery brushless multi-purpose saw is excellent in performance, convenient to use and practical, and more convenient and efficient working experience can be provided for a user; compared with a conventional aluminum alloy product, the improved magnesium alloy product has the advantages that the weight is reduced by more than 20%, the power is increased, the service life of a power supply is prolonged, and the effective power is increased by more than 10% and the service time of a battery is prolonged by more than 15%.

The invention belongs to the technical field of distributed optical fiber sensing, and discloses a low-noise Brillouin sensing device and method based on injection-locked chaotic laser. The device comprises a broadband chaotic laser source, an adjustable attenuator, a polarization controller, a first circulator, a semiconductor laser, a beam splitter, an optical delay generator, an optical isolator, a sensing optical fiber, a single-sideband modulator, a semiconductor optical amplifier, a low-noise amplifier, a second circulator, an optical filter, a photodetector, a phase-locked amplifier, and a computer. The invention utilizes injection-locked chaotic laser to excite a narrowband correlation peak, suppresses the intensity noise introduced by the broadband chaotic laser source, improves the measurement signal-to-noise ratio, and can realize distributed temperature and strain monitoring with long distance, high spatial resolution, and high measurement accuracy.

The application discloses a vertical roller mill and a machine-made sand production system, and relates to grinding equipment technology. The roller mill comprises a grinding part, wherein a grinding disc and a grinding roller constitute part of the grinding part. The roller mill comprises a pre-milling part and an adaptive material blocking adjusting part. The pre-milling part is composed of a feeding center shaft and milling units, and the feeding center shaft is located above the grinding disc. The N milling units are uniformly distributed around the feeding center shaft, and the pre-milling part of the milling units is in contact with the grinding end face of the grinding disc. The adaptive material blocking adjusting part comprises a rocker seal frame, a material blocking device and a linkage assembly. The rocker seal frame serves as a grinding roller support and is installed on the roller mill rack. The material blocking device comprises a fixed material blocking device and a sliding material blocking device combined with the fixed material blocking device through vertical movement, and the two devices jointly form a surrounding blocking structure. The linkage assembly connects the rocker seal frame and the sliding material blocking device, so that the rocker seal frame drives the sliding material blocking device to move upwards through the linkage assembly. Through the technical innovations, the performance of the vertical roller mill is comprehensively improved.

The application relates to the field of vehicle silencers, in particular to a silencer assembly for a vehicle and the vehicle, which comprises a purification device, a first silencer and a second silencer, the air inlet end of the purification device is adapted to be connected with the air outlet end of an engine, the first silencer is arranged downstream of the purification device, and the second silencer is arranged downstream of the first silencer; wherein the first silencer is internally provided with a silencing piece, a plurality of silencing elastic sheets are arranged on the silencing piece and are spaced from each other, the second silencer is internally provided with a silencing cavity, a silencing pipe which is in communication with the first silencer is arranged in the silencing cavity, the silencing pipe is formed with a silencing hole which is in communication with the silencing cavity, through the plurality of silencing elastic sheets which are spaced from each other in the first silencer, the silencing elastic sheets are subjected to forced vibration under the impact of airflow, the vibration generates anti-phase sound waves to realize noise cancellation and energy dissipation of the noise, the influence of exhaust back pressure in the silencer assembly is reduced, and the contradiction between noise control and back pressure rise is balanced.