33results about How to "Reduce noise hazards" patented technology

The invention discloses a main driving mechanism of a six-arm cutterhead used for a shield machine. The main driving mechanism comprises a shield machine cutterhead and a main driving mechanism. The main driving mechanism is characterized by mainly comprising a synchronous variable frequency motor (1), a gear device (2) and a main bearing (3), wherein the output end of the variable frequency motor (1) is tightly connected with the input end of the gear device (2); the output end of the gear device (2) is connected with the main bearing (3) and drives the main bearing (3) to rotate; the main bearing (3) is connected with a shield machine cutterhead by connected flanges (4); the upper part of the main bearing is provided with a sealing assembly (5); the synchronous variable frequency motor (1) is provided with brake; and the variable frequency motor (1), the gearing device (2) and the main bearing (3) are connected to form a dismountable integral structure. In the invention, the synchronous variable frequency motor serves as a driving mode, full-amount torque can be reached when speed is regulated within a range from 0 to 50Hz, and the main driving mechanism has the beneficial effect of small starting current, high efficiency and small noise harm and is simple to maintain.

The present invention provides a safe and low-noise steam turbine. The steam turbine includes: a rotor and a cylinder with a lubricating device inside. The rotor is rotatably connected to the cylinder, and the friction between the air in the cylinder and the cylinder When the set value is reached, the lubricating device automatically injects lubricant into the cylinder. The invention adopts a cylinder with a lubricating device inside, and the rotor rotates at a high speed in the cylinder, so that when the friction force between the air in the cylinder and the cylinder reaches the set value, the friction plate moves, driving the plug head to overcome the spring pressure to leave the plug, and lubricate The device automatically injects lubricant into the cylinder to reduce the friction between the air in the cylinder and the cylinder, thereby reducing the noise hazard.

The invention discloses a method for coating wire with ice-snow prevention layers. The method comprises the following steps of spraying waterproof paint on the surface of the wires to form a coating layer, regulating the coating layer on the surface of the wire to enable the coating layer to reach the set thickness, and drying the coating layer of the wire at a temperature between 50 and 70 DEG C. The invention also discloses a coating device of the method. Because the invention adopts pressure coating, gaps among aluminum strands on the outermost layer of the wire can be filled up; through the adjustment of a diameter-setting mold, the coating layer is not only uniform in the surface, but also controllable in thickness, so the whole coated wire is smooth and compact in the surface, and snow or frozen rain is not easy to solidify on the surface of the wire; and a steel wire on a center layer of the wire is not easy to pollute by rainwater or corrosive atmosphere. Therefore, the wire not only has the characteristics of preventing ice and snow and resisting corrosion, but also has the advantages of reducing the vibrating and waving harm of breeze, lowering the level of corona and radio interference and enabling power transmission lines to be lower in noise hazard and friendlier to environment.

The invention provides a humidifying and silencing ventilation pipeline device. A plurality of supporting racks are included and arranged in a ventilation pipeline. The section of each supporting rackis in a symmetric streamline shape, the head-tail direction of each supporting rack is kept to be consistent with the gas flowing direction, and gas jet flow flows towards the tails of the supportingracks from the heads of the supporting racks. An inner pipeline is arranged on the inner side of the front portion of each supporting rack, and a plurality of water spraying holes are formed in the wall faces of the two sides of the front portion of each supporting rack, wherein the inner pipeline comprises a driver, a transmission rod, a supporting pipe, an inner water conveying pipe and a rotary water spraying pipe, water can be sprayed from the positions of the water spraying holes, and the water spraying direction can be adjusted. Drying layers are arranged on the two sides of the rear portion of each supporting rack, water discharging grooves are formed in the lower positions of the drying layers, and the drying layers can absorb water of the surrounding environment and discharge water into the water discharging grooves. The water discharging grooves communicate with a water discharging pipe outside the ventilation pipeline. According to the humidifying and silencing ventilationpipeline device, on the basis of optimizing of the pipeline inner gas flow field, the humidifying noise lowering technology is utilized, spreading of noise in the ventilation pipeline is restrained, and background noise is lowered.

A method and apparatus for assisting in flight management of an aircraft during a landing phase. The device comprises means for automatically determining an adaptive aiming point (P1f) which is offset in the downstream direction along the runway (15) and which can be used by different common landing aids of the aircraft.

The invention relates to a cleaning device for the shaving head of an electric shaver. The cleaning device (1) comprises a holding part (2) into which the shaving head can be inserted. A pump (5) delivers a cleaning liquid (4) from a reservoir (3) to the holding part (2). A controllable drainage (9) from the lower area of the holding part (2) to the reservoir (3) ensures that the cleaning fluid (4) only flows back into the reservoir (3) when necessary. This results in the cleaning liquid (4) remaining in contact longer with the shaving head to be cleaned without the pump (5) having to continuously operate.

The invention discloses sound elimination enclosure plates and an enclosure system which can effectively reduce the noise hazard. The enclosure system comprises a building base, a plurality of supporting pieces fixedly connected with the building base and the sound elimination enclosure plates; the sound elimination enclosure plates comprise plate face parts, connecting fixing parts (3) and overlapping buckling parts (4), wherein the connecting fixing parts (3) and the overlapping buckling parts (4) are located on the two sides of the width directions of the plate face parts; the connecting fixing parts (3) are used for being fixedly connected with the supporting pieces; every two adjacent sound elimination enclosure plates are buckled on the connecting fixing parts (3) in an overlapping mode through the overlapping buckling parts (4) to achieve bolt-free overlapping buckle connection; and the plate face parts comprise convex strips (1) and grooves (2) which longitudinally penetrate through the length direction and are arranged / formed at intervals. When external sound passes through the sound elimination enclosure plates, the sound noise is subjected to reflection and refraction at the grooves (2), energy conversion is generated, sound waves are converted into mechanical energy and heat energy, the sound elimination effect is achieved, the length directions of arrangement of all the sound elimination enclosure plates are perpendicular to the supporting pieces, and the sound elimination enclosure plates and the enclosure system can be widely applied to the field of metal enclosure.

The invention discloses an inverse armature brazing machine with double feeding of brazing wire belts and a welding technology thereof. The inverse armature brazing machine comprises an armature preparation plate, a machine base, a loading supporting base, a servo clamping and indexing mechanism, an armature loading supporting roller mechanism, an armature supporting rectification mechanism, a wire pressing and welding mechanism, a first brazing wire belt feeding mechanism, a second brazing wire belt feeding mechanism, a brazing filler metal plate and a smoke absorption mechanism. According to the machine, the brazing wire belts can be fed to the welding areas between outer-layer wires and inner-layer wires and the welding areas between the inner-layer wires and a commutator segment at the same time so as to be located in the middle of a conducting loop in welding and become the largest heat emission spot, and therefore the problem that a commutator emits heat excessively and then becomes expanded and deformed in the traditional lateral brazing wire belt feeding and welding process is solved, and the problems that temperature rise is excessive and the service life is short due to the small sectional area of arc welding connection and welding spot connection caused by single feeding of the brazing wire belts are solved; two wire processes of argon arc welding are eliminated in the armature welding process, the welding efficiency is high, welding is more reliable, less brazing filler metal is used, and the welding benefit is better.