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42results about How to "Eliminate vibration noise" patented technology

Ion wind indoor unit, ion wind air conditioner system and control method

The invention discloses an ion wind indoor unit, an ion wind air conditioner system and a control method, and relates to the technical field of refrigerating and heating equipment. In order to solve the problems that an existing air conditioner indoor unit is large in occupation size, large in noise and the like, the ion wind indoor unit is designed. The ion wind indoor unit comprises a shell and an indoor heat exchanger arranged in the shell; an ion wind generator is arranged on the upwind side and / or downwind side of the indoor heat exchanger, and carries out corona on air entering the interior of the generator to generate ion wind and blow out the iron wind so as to achieve convection heat exchange of indoor air; and meanwhile, the ion wind air conditioner system with the ion wind indoor unit and the control method of the air conditioner system are provided. The ion wind indoor unit can reduce the starting noise of air and eliminate electromagnetic noise of a motor and vibration noise of a structural part; use comfort is greatly improved; and meanwhile, the indoor unit structure is simplified, the occupied size of the indoor unit is reduced, the attractiveness of the indoor unit is improved, and the production cost and the assembling cost are reduced.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD

Noise extraction device using microphone

A noise extraction device includes: a first and a second microphone unit (11, 12) for collecting a sound; a directivity synthesis unit which directivity-synthesizes output signals from the first and the second microphone unit (11, 12) to generate two directivity synthesis signals having different noise sensitivities but identical directivity characteristic for a sound pressure and an identical acoustic center position; and an acoustic cancelling unit which subtracts one of the directivity synthesis signals from the other and cancels an acoustic component in one of the directivity synthesis signals so as to extract a noise component.
Owner:PANASONIC CORP

Noise canceling apparatus for weight measurement, and noise canceling method for weight measurement

A noise canceling apparatus (1) comprises an amplifier (10) for amplifying a measured signal (ms) outputted from a measuring device (3), an analog filter (11), an ADC (12), a digital filter (14), a coefficient control section (13), and a data input section (15). The digital filter (14) is a notch filter for attenuating a frequency component of a quantitative signal D(n) outputted from the ADC (12) at a plurality of notches (stop bands). A transfer function of the digital filter (14) is expressed by the product of a plurality of factors each having a root that corresponds to each one of the plurality of notches. The coefficient control section (13) changes a frequency component of a root corresponding to a notch selected from the plurality of notches, and thereafter, expands in a polynomial the transfer function of the reconstructed digital filter (14). On the basis of the polynomial thereby obtained, a new series of filter coefficients is calculated. A filter characteristic is controlled in such a manner that it conforms to a frequency variation of a fixed-period vibration noise, whereby the fixed-period vibration noise that varies in frequency is attenuated with a high degree of precision.
Owner:ISHIDA CO LTD

Gas suspension vehicle for track transportation and space launching and its special-purpose equipment

The present invention discloses an air suspension train for rail haulage and space launch and its special-purpose equipment. It is formed from air compressor, jet slide plate, slipper and train body, trackway component and power device. It utilzies the air bearing effect produced by jet slide plate to implement microresistance glide, and uses the diagonal bridge overhead rail. It is simple in structure, light in weight, reliable, can run at ultraspeed and can economize lots of energy source, and is a traffic tool combining the advantages of air cushion ship and cable car railway, etc. and can implement supersonic acceleration aviation by utilizing aerospaceplane.
Owner:黄先革

Fan module

The invention relates to a fan module which comprises a fan and a silencing device which is arranged on the fan. The silencing device comprises a first silencing assembly, the first silencing assembly is attached to one side o the fan, an airflow passage corresponds to an air port of the fan, and the first silencing assembly is made of porous materials to absorb winding cutting sound or vibration generated in fan operation to reduce the noise generated in the fan operation.
Owner:GIGA BYTE TECH CO LTD

Oscillation mechanism for soil VOCs treatment instrument and soil VOCs treatment instrument

The invention discloses an oscillation mechanism for a soil VOCs treatment instrument and the soil VOCs treatment instrument, and relates to an oscillation mechanism for oscillating a soil sample. Thepurpose of the invention is to provide an oscillation mechanism for a soil VOCs treatment instrument and a soil VOCs treatment instrument with simple structure and excellent oscillation effects. Theoscillation mechanism for the soil VOCs treatment instrument comprises sampling bottles, the oscillation mechanism is used for vibrating the sampling bottles, the oscillation mechanism is arranged inan acute-angle inclined manner relative to the ground, the sampling bottles can automatically flow to the next procedure after finishing oscillation in the oscillation mechanism, the oscillation mechanism comprises oscillation guide rails, the oscillation guide rails are arranged in the flow direction of the sampling bottles and are arranged in an acute-angle inclined manner relative to the ground, and a plurality of sampling bottles are sequentially arranged on the oscillation guide rails in the flow direction and are horizontally arranged relative to the oscillation guide rails. The soil VOCs treatment instrument also comprises a headspace mechanism, the headspace mechanism is used for carrying out the headspace to the sampling bottles, the headspace mechanism is arranged in parallel relative to the ground, and the sampling bottles can automatically flow from the oscillation mechanism to the headspace mechanism.
Owner:北京鹏宇昌亚环保科技有限公司

External gear pump and electric lubricating oil pump

The invention discloses an external gear pump and an electric lubricating oil pump. The electric lubricating oil pump includes the external gear pump and an installation plate. The external gear pumpis arranged on the installation plate through a screw. The external gear pump includes a pump shell with a pump chamber formed through buckling an upper shell and a lower shell, and two gears which are externally meshed with each other and are arranged in the pump chamber through bearings. The gears are driven to rotate by a motor. An end surface of the pump chamber includes an oil inlet groove,and the oil inlet groove is extended along a rim direction of each gear and is superposed with gear teeth of at least part of the gears on the side of an oil inlet cavity. At least one side of each gear is provided with the oil inlet groove, and the oil inlet groove is connected with an oil inlet pipeline. By adopting methods of supplementing oil from the side of the gear and supplementing oil through a tooth crest superposition mode, an area of the oil inlet cavity is increased, oil intake of a single tooth crest direction is reduced, and an insufficient filling phenomenon of lubricating oilcaused by a radial centrifugal force is avoided. A vibration noise and flow drop caused by cavitation are eliminated, and power losses of the electric lubricating oil pump are reduced.
Owner:上海尚实航空发动机股份有限公司

Miniature mega bass double-drive low-frequency vibrator

The invention discloses a miniature low-frequency vibrator capable of being directly driven by an audio signal, which belongs to the technical field of vibrators and comprises a base, an upper cover,a side cover, a flexible circuit board, a coil, a magnet, a balancing weight, elastic pieces, an inner welding sheet, an outer welding sheet, an insulating adhesive tape and a buffer body. According to the invention, the magnet and the coil adopt a double-drive structure of which the upper surface and the lower surface are symmetrical, so that components of electromagnetic force in the non-vibration direction are mutually counteracted, and vibration noise is eliminated. The elastic piece adopts a V-shaped structure, so that the effective length of a deformation area is increased, and the response frequency can be lower. The two V-shaped elastic pieces are distributed in a central symmetry manner, so that the operation is more stable. The buffer body is used for preventing the elastic pieces from bearing large impact force and being damaged when the circuit voltage is too high, and the service life is prolonged.
Owner:CHIZHOUSHI HONGGANG SCI & TECH ELECTRONICS CO LTD

Light-weight high-performance concrete for fabricated building and preparation method of light-weight high-performance concrete

The invention belongs to the technical field of concrete, and particularly discloses lightweight high-performance concrete for a prefabricated building and a preparation method of the lightweight high-performance concrete. Each cubic meter of the concrete comprises the following raw materials by weight: 300-350 kg of cement, 160-200 kg of compound ultrafine powder, 300-350 kg of shale pottery sand, 300-450 kg of solid waste ultralight ceramsite, 4-7 kg of a polycarboxylic acid superplasticizer, 0.5-7 kg of fibers and 100-200 kg of water, the special compound ultrafine powder is prepared, and the solid waste ultralight ceramsite is subjected to surface modification and other operations to achieve the purpose of the invention. The concrete prepared by the invention has the advantages of light dead weight, sufficient toughness, good crack resistance, heat preservation, noise reduction and the like, does not need to vibrate during forming, can improve the loading capacity and anti-seismic property of the structure, reduces the hoisting and transportation cost and reduces the construction strength, and is environment-friendly, low-carbon and energy-saving concrete.
Owner:山西黄河前沿新材料研究院有限公司 +2

Self-lubricating connecting rod plunger type valve flow distribution hydraulic pump

The invention discloses a self-lubricating connecting rod plunger type valve flow distribution hydraulic pump which adopts a working mode of cylinder body rotary type valve flow distribution, rotating centrifugal force during working is beneficial to opening of a suction valve arranged in the radial direction, and the working pressure and suction performance of the pump are improved. A compact-structure non-spherical-hinge type return stroke mechanism and an integrated fixed connecting rod plunger are adopted, and sliding bearings are arranged on the outer circle of a connecting rod fixing disc and the outer circle of a cylinder body, so that lateral force of key components is effectively balanced. All friction pairs can achieve self-lubrication, a key friction pair is formed by pairing hard-hard materials of corrosion-resistant hard alloy and composite engineering ceramic, and a plane friction pair adopts a bionic texture to improve the lubrication and abrasion performance of the plane friction pair. The self-lubricating connecting rod plunger type valve flow distribution hydraulic pump has the obvious technical advantages of being high working pressure, large power-to-weight ratio, high pollution resistance, high reliability and the like, and can be widely applied to the ultrahigh pressure hydraulic system with hydraulic oil or pure water as a transmission medium.
Owner:BEIJING UNIV OF TECH

An energy-saving excitation current-conducting iron core reactor

The invention provides an energy-saving exciting diversion iron-core reactor, which comprises an iron core and an iron core assembly device, wherein the iron core comprises an upper yoke, a lower yoke and core columns; coils are wound outside the core columns in a hidden manner; each core column is formed by stacking multiple groups of air gap plates and magnetic conductive discuses at intervals and is arranged between the upper yoke and the lower yoke; hollow magnetic guide cakes are arranged between each core column and the upper yoke and between each core column and the lower yoke respectively; the iron core assembly device comprises bases, center pull rods arranged on the base and pressure plates; the pressure plates are arranged at the upper part of the upper yoke; the bases are arranged at the lower part of the lower yoke; each center pull rod runs through predefined holes in the upper yoke, the lower yoke and the corresponding core column; the upper end of each center pull rod is fixed to the corresponding pressure plate; and the lower end of each center pull rod is fixed to the corresponding base. The energy-saving exciting diversion iron-core reactor has the beneficial effects that (1) the exciting heating problem in the magnetic flux shunting process is solved; (2) vibration noise caused by an AC fundamental wave is eliminated; and (3) the total loss is reduced by 25% under the same conditions of a traditional product and the hot-spot temperature rise is reduced to within 90K from more than 150K.
Owner:ZHEJIANG KESHENG ELECTRIC POWER EQUIP

Water pan water level control device, control method of water pan water level control device and air conditioner

The invention provides a water pan water level control device, a control method of the water pan water level control device and an air conditioner. The device is used for controlling the water level of a water pan. The water pan comprises a bottom plate and a side wall and further comprises a water pump arranged in the water pan and used for extracting condensate water in the water pan, a pipeline through which the interior of the water pan communicates with the external environment, a temperature sensor arranged on the pipeline, a connector water pipe connected with the water pump, and a mainboard circuit electrically connected with the temperature sensor and the water pump and used for controlling the water pump to run. One end of the pipeline communicates with the interior of the water pan through the bottom plate, an opening is formed in the other end of the pipeline, and the vertical height of the other end of the pipeline is larger than the preset height of a water full protection position. The vertical distance between the temperature sensor and the bottom plate is a preset value. The water pan water level control device is free of noise and better in use effect and has the beneficial effects of being stable, reliable, capable of saving space, low in cost and the like.
Owner:GREE ELECTRIC APPLIANCES INC

Energy-saving exciting diversion iron-core reactor

ActiveCN105931813ASolve the problem of excitation heatingLow priceTransformers/inductances magnetic coresCores/yokesEngineeringMagnetic flux
The invention provides an energy-saving exciting diversion iron-core reactor, which comprises an iron core and an iron core assembly device, wherein the iron core comprises an upper yoke, a lower yoke and core columns; coils are wound outside the core columns in a hidden manner; each core column is formed by stacking multiple groups of air gap plates and magnetic conductive discuses at intervals and is arranged between the upper yoke and the lower yoke; hollow magnetic guide cakes are arranged between each core column and the upper yoke and between each core column and the lower yoke respectively; the iron core assembly device comprises bases, center pull rods arranged on the base and pressure plates; the pressure plates are arranged at the upper part of the upper yoke; the bases are arranged at the lower part of the lower yoke; each center pull rod runs through predefined holes in the upper yoke, the lower yoke and the corresponding core column; the upper end of each center pull rod is fixed to the corresponding pressure plate; and the lower end of each center pull rod is fixed to the corresponding base. The energy-saving exciting diversion iron-core reactor has the beneficial effects that (1) the exciting heating problem in the magnetic flux shunting process is solved; (2) vibration noise caused by an AC fundamental wave is eliminated; and (3) the total loss is reduced by 25% under the same conditions of a traditional product and the hot-spot temperature rise is reduced to within 90K from more than 150K.
Owner:ZHEJIANG KESHENG ELECTRIC POWER EQUIP
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