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30results about How to "Make noise" patented technology
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Self-learning method for double-clutch automatic gearbox shifting fork shifting force
The invention provides a self-learning method for double-clutch automatic gearbox shifting fork shifting force. The method comprises the steps that when the self-learning condition is met, gear shifting is conducted with default shifting force, and whether gear pre-engagement can be achieved or not is judged; if gear pre-engagement can be achieved through the default shifting force, the default shifting force is decreased by a first preset value, gear shifting is conducted again, and if gear pre-engagement can still be achieved, the operation that the default shifting force is decreased by the first preset value is repeatedly executed, until gear pre-engagement fails; and the last shifting force before failure of gear pre-engagement times a set safety coefficient to serve as new default shifting force, and self-learning is completed. The method can reduce noise caused by abrasion to a gear-shifting shifting fork, and the service life can be prolonged.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Heavy-load high-temperature self-lubricating rolling bearing and processing technology
ActiveCN110454504AGuaranteed lubrication effectPlay a protective effectBearing componentsHeavy loadLubrication
The invention relates to a heavy-load high-temperature self-lubricating rolling bearing. The bearing includes an inner ring, an outer ring, and an intermediate ring arranged between the inner ring andthe outer ring, wherein the inner ring, the intermediate ring and the outer ring are concentric, a ball set is arranged between the intermediate ring and the outer ring, the outer ring rotates relative to the intermediate ring according to the ball set, the intermediate ring and the inner ring are fixedly connected, and a lubrication cavity is formed between the intermediate ring and the inner ring. The lubrication cavity is internally provided with a lubricant extrusion device which is communicated with a lubricant nozzle penetrating through the intermediate ring. When the lubricant extrusion device is heated, the lubricant extrusion device extrudes a lubricant from the lubricant extrusion device to the space between the intermediate ring and the outer ring through the lubricant nozzle to provide lubrication for rolling of the ball set, the problem is effectively solved that the lubricant and a channel of the bearing form stains and noise and vibration are caused, and the safety andstability of the bearing in work are improved.
Owner:NANCHANG INST OF TECH
Automobile brake pad and preparation method thereof
InactiveCN105402292AReduce noiseLow thermal decayOther chemical processesFriction liningFiberCarbon fibers
The invention provides an automobile brake pad. The automobile brake pad is prepared from, by weight, 3%-25% of potassium hexatitanate whisker or sodium hexatitanate whisker, 0-20% of aluminum silicate hollow sphere, 0.1%-15% of brown aluminum oxide, 0.1%-20% of carbon fiber, 3%-30% of phenolic resin and 5%-50% of padding. The invention further provides a preparation method of the automobile brake pad. The potassium (sodium) hexatitanate whisker reinforced resin matrix brake pad is low in noise and heat fading performance, a mating plate is not likely to be damaged, and the wear rate is very low; and the service life of a product can be greatly prolonged, resource consumption can be reduced, and the influence to the environment is reduced. Raw materials selected in the automobile brake pad are common and easy to obtain, production cost can be effectively reduced, and great significance in increasing the added value of domestic rich mining deposits is achieved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Porous pavement base layer water storage module and manufacturing method thereof
ActiveCN104452956ASimple structureReduce manufacturing costSewerage structuresClimate change adaptationWater storagePorous pavement
The invention discloses a porous pavement base layer water storage module. The porous pavement base layer water storage module is characterized by comprising at least on main water storage body; the main water storage body is provided with a containing cavity, the containing cavity is provided with an opening part opening upwards, a water permeating cover plate is arranged in the opening part, and a water absorbing filling core is arranged in the containing cavity; the man water storage body is provided with water outlet pipes communicated with the containing cavity. The invention further discloses a method for manufacturing the porous base layer water storage module. The water storage module is simple in structure and low in manufacturing cost, rainwater seeps into the water storage module through the face layer of a porous pavement to be stored and then is evaporated through the pavement, the weather conditions of the area are improved, and the heat island effect is reduced. The function of absorbing noise can be achieved, and the noise caused when the tires of a pavement automobile rub with the pavement is lowered. The invention further provides the method for manufacturing the water storage module. The technology manufacturing is convenient, the manufacturing efficiency is high, and safety and reliability are achieved. The application range is wide, and the water storage module can be applied to roads in communities, squares, urban lanes and the like.
Owner:ZHUHAI CITY SHUITONG ENVIRONMENTAL PROTECTION EQUIP CO LTD
Clutch neutral gear stopping device for automobile automatic transmission
The invention provides a clutch neutral gear stopping device for an automobile automatic gearbox, belonging to the technical field of an automobile. The problem that the conventional automobile wastes energy due to a sliding mould and an engine load in a continuous speed reducing process can be solved. The clutch neutral gear stopping device comprises a TCU (Transmission Control Unit), a collecting piece for collecting position signals of a shift rod, a vehicle speed sensor, an EMS (Engine Management System) and a clutch pressure control module, wherein the collecting piece, the vehicle speed sensor, the EMS and the clutch pressure control module are respectively connected with the TCU. The TCU is used for receiving the position signals of the shift rod, which are collected by the collecting piece, and comparing vehicle speed signals collected by the vehicle speed sensor, accelerator opening signals transmitted by the EMS and brake pressure signals with a set value in the TCU when a shift is a travelling gear. If a vehicle speed is less than a vehicle speed set value, an accelerator opening degrees is less than an accelerate set value, and a brake pressure is more than a brake set value, the TCU sends a request signal of reducing a clutch pressure to control a clutch pressure control module to reduce the clutch pressure. According to the clutch neutral gear stopping device provided by the invention, the fuel economical efficiency of a dual-clutch transmission in the speed reducing process is effectively improved.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
Intermediate-speed large-torque radial plunger hydraulic motor
ActiveCN105756850AEliminate lateral forceEliminates the phenomenon of oval wearPlungersTrunk pistonsHydraulic motorCylinder head
The invention relates to an intermediate-speed large-torque radial plunger hydraulic motor which comprises a casing (1), a crankshaft (2), a roller (3), a bearing bush (4), a cylinder head (5), a telescopic sleeve (6), a retainer ring (7), a hanger rod (8) and a drive shaft (10).The telescopic sleeve (6) is arranged along the radial direction of the bearing bush (4), and the upper end and the lower end of the telescopic sleeve (6) are respectively abutted against an external spherical surface (501) of the cylinder head (5) and an external spherical surface (402) of the bearing bush (4).The lower end of the telescopic sleeve (6) is closely attached to the external spherical surface (402) of the bearing bush (4) by the retainer ring (7).The upper end of the telescopic sleeve (6) is closely attached to the external spherical surface (501) of the cylinder head (5) by the hanger rod (8).Two ends of the drive shaft (10) are respectively connected with the crankshaft (2) and an oil distributing mechanism (9).The roller (3) is inserted in an inner bore (401) of the bearing bush; and the crankshaft (2) comprises an eccentric section (201).Compared with the prior art, the radial plunger hydraulic motor has the advantages of highly increased revolution speed and compact structure.
Owner:INTRA ITAL HYDRAULICS FOSHAN SHUNDE
Hanging type sliding sash
This invention relates to a combined window that can be sliding. The sliding sash is consisted up by nine sections. 1) Section material is a. outline border group frame section material, b. sliding frame group frame section material, c. the sash group frame section material, d. screen window group frame section material, e. up bright window group frame section material. 2) The second section is face type hinge group frame, wheel, hitch angle and hinge group frame. 3) The third section is outline border group frame. 4) The fourth section is lock group. 5) The fifth section is sliding frame group frame. 6) The sixth section is horizontal open window sash group frame. 7) The seventh section is screen window group frame. 8) The eighth section is up bright window group frame. 9) The ninth section is clear wiper. The advantage is that many sliding on original down sliding is eliminated to make down window frame be plane and wipping is easy. It can be installed as an integer, and the installation is easy and simple, and transport is convenient. Consumer can exchange the glass, heat insulating ability is certainly raised. Window sash is opened inside the house, so it is safe and reliable, noise is little, daylighting and sealing effect is good, cost is low, and installation and using is convenient.
Owner:杨俊普
Static microactuator with electric insulative movable portion and related driving circuit
A bidirectional electrostatic rotary microactuator has two sets of fixed electrodes, one set for driving the microactuator counterclockwise and the other set for driving it clockwise, and a rotatable frame that has movable electrodes attached to its outer wall and interleaved between the fixed electrodes. A layer of insulating material is located between the outer wall to which the movable electrodes are attached and the remainder of the frame so that the movable electrodes are electrically isolated. The frame is maintained at ground electrical potential and the movable electrodes at a fixed non-zero electrical potential. The microactuator is driven by applying a plus or minus voltage to one set of fixed electrodes and the opposite voltage to the other set, while maintaining the movable electrodes at a fixed non-zero voltage. The microactuator is usable as a secondary actuator in a disk drive for fine positioning the read / write head.
Owner:HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Aluminum wood veneer
PendingCN111086295AMake noisePlay the function of heat preservationCovering/liningsWood compressionWood veneerAluminum honeycomb
The invention discloses an aluminum wood veneer, which comprises a surface decoration layer, a base material layer, a supporting layer and a back lining layer, wherein the surface decoration layer isarranged on the upper surface of the base material layer, the supporting layer is arranged on the lower surface of the base material layer, the back lining layer is arranged on the lower surface of the supporting layer, and the surface decoration layer, the base material layer, the supporting layer and the back lining layer are bonded through a glue and are compacted through a flat pressing machine. Compared with the aluminum wood veneer in the prior art, the aluminum wood veneer of the invention has the following characteristics that the aluminum wood veneer of the invention is reasonable indesign and simple in structure, the aluminum honeycomb, the aluminum plate and the wood veneer are combined to form the aluminum wood veneer, the obtained aluminum wood veneer has the advantages of being easy to install, capable of insulating sound and heat, resistant to damp and mildew, small in deformation and shrinkage and the like, and the home decoration requirements of modern people can be fully met.
Owner:嘉兴市先超塑胶制品有限公司
Pressure-reduction, anti-explosion and dust-removal device for aerodynamic reservoir reform of coal-bed gas well
ActiveCN103821551AAvoid generatingPrevent deflagrationDust removalFire preventionGas passingEngineering
The invention provides a pressure-reduction, anti-explosion and dust-removal device for aerodynamic reservoir reform of a coal-bed gas well, and is applicable to the technical field of gas power operation of the coal-bed gas well. The pressure-reduction, anti-explosion and dust-removal device mainly comprises a dust remover (1), a diffusion tube (2) and a gas feeding tube (3). During technical construction of a gas power reform coal storage reservoir, high-flow-speed gas is not directly released in air in a pressure releasing stage, is guided by the gas feeding tube (1) to enter the diffusion tube (2), and is subjected to eight pressure reduction effects under the action of eight wind shields (12) in the diffusion tube (2). Gas flows to the dust remover (1) through auxiliary round ventilating holes (5) in the wind shields (12), and coal (rock) powders or particles in the gas are stopped by the wind shields (12), drop, are blown by the gas, enter the dust remover through a coal passing hole (6) and then are removed. A four-stage blade type vortex plate tower tray (7) is arranged in the dust remover (1), the gas is forced to spirally rise by using the four-stage blade type vortex plate tower tray (7), and liquid flow is formed by water flow injected through a water injection tube, is distributed on blades of the vortex plate tower tray (7), is thrown to a wall of a tower by centrifugal force, and then flows in a water draining hole (9).
Owner:河南省资源环境调查二院
Fan operating control system
InactiveCN101096957AMake noiseGenerates noisePump controlNon-positive displacement fluid enginesElectricityControl system
The invention discloses a fan operating controlled system, which is characterized by the following: comprising a electrical source, a controlling switch circuit, a switch controlled signal sending unit and a fan circuit component; sending a nominal electric force with power; electric-connecting the controlled switch circuit to the power; electric-connecting the switch controlled signal sending unit system to the controlled switch circuit; sending a power controlled signal to the controlled switch circuit; electric-connecting the fan circuit element to the controlled switch circuit; passing the nominal electric force through the controlled switch circuit; adjusting to a controlled power; sending to the circuit component of the fan; driving at least one fan to rotate in the fan circuit component; controlling the controlled power with the power controlled signal.
Owner:ASUSTEK COMPUTER INC
Permeable pavement base water storage module and manufacturing method thereof
ActiveCN104452956BSimple structureReduce manufacturing costSewerage structuresClimate change adaptationWater storagePorous pavement
The invention discloses a porous pavement base layer water storage module. The porous pavement base layer water storage module is characterized by comprising at least on main water storage body; the main water storage body is provided with a containing cavity, the containing cavity is provided with an opening part opening upwards, a water permeating cover plate is arranged in the opening part, and a water absorbing filling core is arranged in the containing cavity; the man water storage body is provided with water outlet pipes communicated with the containing cavity. The invention further discloses a method for manufacturing the porous base layer water storage module. The water storage module is simple in structure and low in manufacturing cost, rainwater seeps into the water storage module through the face layer of a porous pavement to be stored and then is evaporated through the pavement, the weather conditions of the area are improved, and the heat island effect is reduced. The function of absorbing noise can be achieved, and the noise caused when the tires of a pavement automobile rub with the pavement is lowered. The invention further provides the method for manufacturing the water storage module. The technology manufacturing is convenient, the manufacturing efficiency is high, and safety and reliability are achieved. The application range is wide, and the water storage module can be applied to roads in communities, squares, urban lanes and the like.
Owner:ZHUHAI CITY SHUITONG ENVIRONMENTAL PROTECTION EQUIP CO LTD
Disc type dragging and power generation integrated pulse power supply system
ActiveCN110971069APlay a protective effectIncrease distanceMagnetic circuit rotating partsMechanical energy handlingBall bearingEngineering
The invention discloses a disc type dragging and power generation integrated pulse power supply system, belongs to the technical field of inertia energy storage pulse power supplies, and aims to solvethe problems of long shafting, large vibration and noise, low system compactness, low energy storage density and low power density due to the fact that two motors are axially arranged at present. A conical bearing is arranged in a fixed platform, a ball bearing is arranged in a fixed device, and a rotating shaft is fixed on the conical bearing and the ball bearing; and upper air gaps are formed between the rotor and the upper stators, the number of the upper stators and the distance between the upper air gaps are respectively adjustable, and lower air gaps are formed between the rotor and thelower stators. An energy storage flywheel is fixed on the rotating shaft, and a permanent magnet is arranged on the surface of the energy storage flywheel; the compensation element is arranged belowthe permanent magnet; a rotor bandage is wound on the surface of a compensation element; the rotating shaft penetrates through a central hole; an armature winding is placed on a stator yoke, and is adischarge end; and the motor stator winding is wound on the stator yoke, and the motor stator winding is a charging end. The beneficial effects are that the charging speed is adjustable, and discharging is protected.
Owner:HARBIN INST OF TECH
Low-noise automobile exhaust pipe device
The invention discloses a low-noise automobile exhaust pipe device. The low-noise automobile exhaust pipe device comprises a rotating plate, wherein a first noise reduction device and a second noise reduction device are mounted on the rotating plate; a protecting shell sleeves the outer wall of the first noise reduction device; a sound absorbing layer is arranged between the outer wall of the first noise reduction device and the protecting shell; the first noise reduction device comprises a retractable rod; the top of the retractable rod is fixedly connected with a positioning device; a heat insulating layer is arranged on a side wall of the positioning device; pressure springs are uniformly distributed between the positioning device and the heat insulating layer; the top of the positioning device is fixedly connected with a connecting rod; a rotating device is arranged inside the connecting rod; a connecting hole is formed in the rotating device; and a buffer layer is arranged above the connecting hole. By the low-noise automobile exhaust pipe device, noises of an exhaust pipe are reduced effectively, the exhaust pipe can be fixed firmly and cannot drop easily, and pedestrians can be prevented from being scalded by the exhaust pipe to a certain degree.
Owner:ZHEJIANG RED ARROW RUBBER
Static microactuator with electric insulative movable portion and related driving circuit
A bidirectional electrostatic rotary microactuator has two sets of fixed electrodes, one set for driving the microactuator counterclockwise and the other set for driving it clockwise, and a rotatable frame that has movable electrodes attached to its outer wall and interleaved between the fixed electrodes. A layer of insulating material is located between the outer wall to which the movable electrodes are attached and the remainder of the frame so that the movable electrodes are electrically isolated. The frame is maintained at ground electrical potential and the movable electrodes at a fixed non-zero electrical potential. The microactuator is driven by applying a plus or minus voltage to one set of fixed electrodes and the opposite voltage to the other set, while maintaining the movable electrodes at a fixed non-zero voltage. The microactuator is usable as a secondary actuator in a disk drive for fine positioning the read / write head.
Owner:HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Clutch neutral gear stopping device for automobile automatic transmission
The invention provides a clutch neutral gear stopping device for an automobile automatic gearbox, belonging to the technical field of an automobile. The problem that the conventional automobile wastes energy due to a sliding mould and an engine load in a continuous speed reducing process can be solved. The clutch neutral gear stopping device comprises a TCU (Transmission Control Unit), a collecting piece for collecting position signals of a shift rod, a vehicle speed sensor, an EMS (Engine Management System) and a clutch pressure control module, wherein the collecting piece, the vehicle speed sensor, the EMS and the clutch pressure control module are respectively connected with the TCU. The TCU is used for receiving the position signals of the shift rod, which are collected by the collecting piece, and comparing vehicle speed signals collected by the vehicle speed sensor, accelerator opening signals transmitted by the EMS and brake pressure signals with a set value in the TCU when a shift is a travelling gear. If a vehicle speed is less than a vehicle speed set value, an accelerator opening degrees is less than an accelerate set value, and a brake pressure is more than a brake set value, the TCU sends a request signal of reducing a clutch pressure to control a clutch pressure control module to reduce the clutch pressure. According to the clutch neutral gear stopping device provided by the invention, the fuel economical efficiency of a dual-clutch transmission in the speed reducing process is effectively improved.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
Air purifier
PendingCN110292811AImprove noiseMake noiseDispersed particle filtrationTransportation and packagingEngineeringAir purifier
The invention relates to the technical field of household appliances, in particular to an air purifier. The air purifier comprises a bracket and a main purifier body mounted on the bracket, the main purifier body comprises a fan and a filtering device, the fan is provided with an air inlet and an air outlet, and the filtering device is in a cylindrical shape and is arranged around the fan, whereinthe air inlet of the fan is formed corresponding to the end face of the filtering device, and the air outlet of the fan is formed corresponding to the side wall of the filtering device. To-be-purified air is introduced from the end face of the filtering device and discharged from the side wall of the filtering device so that the filtering device can achieve the effect of isolating the outside world from the fan noise in the working process of the air purifier, the noise at the air outlet of the fan can be reduced at the same time, correspondingly the electromagnetic noise of a motor in the fan and the noise of airflow at the air outlet of the fan can be further reduced without adding additional components, and the noise problem of the air purifier is further alleviated.
Owner:GREE ELECTRIC APPLIANCES INC
An integrated pulse power supply system for disk drive and power generation
ActiveCN110971069BPlay a protective effectIncrease distanceMagnetic circuit rotating partsMechanical energy handlingBall bearingEngineering
Owner:HARBIN INST OF TECH
Assembly and method for mounting a pump bearing in/on plastic coolant pump housings
InactiveCN101213372BAchieve preloadOptimal hardening temperaturePump componentsBearing assemblyCoolant pump
Owner:欧根·施密特博士仪器和泵制造有限责任公司
Wear-resistant bearing rolling body
ActiveCN107502939AImprove wear resistanceNo change in precisionAnodisationShaftsWear resistantCoconut oil
The invention discloses a wear-resistant bearing rolling body. The wear-resistant bearing rolling body is obtained by performing pressurized soaking on a bearing rolling body by adopting a coconut oil-sodium glutamate solution, adding the bearing rolling body into a low-temperature plasma treatment device for performing low-temperature plasma treatment after the bearing rolling body is cleaned and dried, wherein the treatment time is 70 to 80 seconds; after the treatment is completed, adding the bearing rolling body into a micro-arc oxidizing device for performing micro-arc oxidizing treatment within 60 seconds, wherein the treatment time is 2 to 3 minutes; then, performing soaking treatment on the bearing rolling body in castor oil; and after the bearing rolling body is soaked, taking the bearing rolling body out, and wipe-drying the surface of the bearing rolling body. The wear resistance of the bearing rolling body can be remarkably improved by treating the bearing rolling body by the method provided by the invention.
Owner:阜阳市鼎铭汽车配件制造有限公司
Compound screw
PendingCN111075897AMake noiseReduce noiseGearingGear vibration/noise dampingStructural engineeringMechanical engineering
The invention discloses a compound screw comprising a core shaft and a spiral shaft sleeve arranged on the core shaft in a sleeving manner. The core shaft comprises a body part and a connection part arranged on the middle portion of the body part. The connection part comprises multiple first protrusions arranged in the circumferential direction of the body part. Multiple first notches formed in the length direction of the first protrusion are formed in the outer side face of each first protrusion. The spiral shaft sleeve is provided with a shaft hole in clearance fit with the connection part.A buffer rubber sleeve is arranged between the shaft hole and the connection part in a filling manner. The buffer rubber sleeve comprises a main rubber sleeve matched with the peripheral face of the connection part and the inner side face of the shaft hole and two side rubber sleeves arranged at the two ends of the main rubber sleeve correspondingly and matched with the end faces of the connectionpart. The buffer rubber sleeve of the compound screw can absorb impact and vibration which are generated by movement, a buffering and noise reduction effect is achieved, and the transmission efficiency and the structure reliability are improved.
Owner:SHENZHEN SHENGSHI ELEVATOR CO LTD
regulation system
ActiveCN102874136BWeight increaseStrong weightMovable seatsClassical mechanicsMechanical engineering
The invention relates to an adjustment system for a vehicle seat connected to two rails (1, 2, 2*) and movable by means of said two rails (1, 2, 2*), with a Holding elements (3, 3*) made of plastic between the two rails (1, 2, 2*) and reinforcing elements (6, 6) connected to the holding elements (3, 3*) *).
Owner:BROSE FAHRZEUGTEILE GMBH & CO KG
Large denoising gear convenient to splice and demount
InactiveCN108561534AEasy to splice and disassembleMake noisePortable liftingGearing elementsEngineeringMechanical engineering
The invention belongs to the technical field of hardware, and relates to a large denoising gear capable of being spliced and demounted. The large denoising gear has the advantages that a gear body isof a structure capable of being spliced and demounted, so that the large denoising gear is convenient to demount and repair for reuse or replacement, and using cost is reduced; a connection plate is of a taper structure and is matched with the gear body in shape, a protruded connection column is arranged in a bent way, and firmness in connection and convenience in demounting are achieved; silencing holes are formed at positions, close to teeth, of the gear body, and can absorb noise generated by transmission among gears effectively; the structure is simple and reasonable.
Owner:苏州市相城区阳澄湖镇腾正五金有限公司
A decompression and explosion-proof dust removal device for aerodynamic reservoir transformation of coalbed methane wells
ActiveCN103821551BAvoid generatingPrevent deflagrationDust removalFire preventionGas passingWater flow
Owner:河南省资源环境调查二院
Multifunctional mulch applicator
InactiveCN104943352AReasonable structural designNice appearancePrinting press partsLiquid-crystal displayEngineering
The invention discloses a multifunctional mulch applicator, and relates to the field of papermaking machining devices. Groove handles are arranged on the outer sides of a first fixed base and a second fixed base respectively. A liquid crystal operation screen is arranged at the upper portion of the front end face of the first fixed base. Operation buttons are arranged at the lower portion of the liquid crystal operation screen. An art knife containing box is arranged in the second fixed base and provided with a transparent cover body. The two ends of a lower sleeve mulch pipe are fixed to the two sides of the lower end of a paper inlet table respectively. A hand pedal is installed at the lower end of the second fixed base through a power line. The bottoms of the first fixed base and the second fixed base are each provided with supporting legs. The multifunctional mulch applicator is reasonable in structural design, attractive in appearance, novel in modeling, convenient to operate, small in size, light in weight, free of space occupation, convenient to transport and diversified in function; operation is conducted by means of the liquid crystal display, an alarm indicator lamp can flicker under emergency so that a warning effect can be achieved, running is stable, noise can be effectively reduced, and use requirements of people are met.
Owner:QUANZHOU QUANGANG ZHUOLIN FINANCE MANAGEMENT
Aircraft engine test run honeycomb noise reduction flow guide screen and using method
PendingCN111634439AIncrease diversion rateReduce Secondary NoiseNoise reduction installationsHoneycombAirplane
The invention relates to an aircraft engine test run honeycomb noise reduction flow guide screen and a using method. The using method comprises the following steps that a flow guide screen is fixed toa site in a bolt bar planting mode; an aircraft is dragged into the U-shaped flow guide screen, the nose is arranged to face the outside of the U-shaped flow guide screen, and the tail is arranged toface the inner screen body of the U-shaped flow guide screen; an aircraft engine is started, airflow of the engine impacts the flow guide screen body with noise and enters a plurality of noise reduction flow guide cups on the surface of the flow guide screen, the airflow enters arc-shaped cup bottoms of the noise reduction flow guide cups to form airflow recoil, and a layer of air cushion is formed on the surface of the flow guide screen; subsequent engine airflow impacts the air cushion, and neutralized airflow is generated; the direction of the neutralized airflow is changed along with thearc-shaped surface of a honeycomb noise reduction flow guide screen main body, horizontal airflow is guided into upward flowing airflow, and the airflow flows out through a wing noise reduction flow guide plate at the top of the flow guide screen, so that the flow guide rate of the airflow is effectively improved, the noise is greatly reduced, and the double effects of airflow guide and noise treatment are achieved.
Owner:TIANJIN ZAIFA SCI & TECH CO LTD
Self-learning method of shifting force of double clutch automatic transmission fork
The invention provides a self-learning method for double-clutch automatic gearbox shifting fork shifting force. The method comprises the steps that when the self-learning condition is met, gear shifting is conducted with default shifting force, and whether gear pre-engagement can be achieved or not is judged; if gear pre-engagement can be achieved through the default shifting force, the default shifting force is decreased by a first preset value, gear shifting is conducted again, and if gear pre-engagement can still be achieved, the operation that the default shifting force is decreased by the first preset value is repeatedly executed, until gear pre-engagement fails; and the last shifting force before failure of gear pre-engagement times a set safety coefficient to serve as new default shifting force, and self-learning is completed. The method can reduce noise caused by abrasion to a gear-shifting shifting fork, and the service life can be prolonged.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Rainwater flow guiding pipe with silencing pipe wall and silencing outer pipe wall
The invention provides a rainwater flow guiding pipe with a silencing pipe wall and a silencing outer pipe wall. The portion between the two layers of pipe walls is divided into a plurality of closed small spaces which can primarily obstruct noise generated when the pipe walls are washed by rainwater. Beside, the small spaces are filled with energy absorbing balls. When sound is transmitted into the small spaces, sound wave vibration energy is absorbed, and noise is further eliminated. Canine-tooth-type staggered protrusions are arranged on the inner side of inner pipe wall in the radial direction. After rainwater is washed down, the rainwater flows along a circumflex-shaped path formed by the staggered protrusions, rainwater washing speed is decreased, sound generated when the rainwater impacts the pipe walls is reduced, and the effect of eliminating noise is achieved. The height of the protrusions becomes smaller while the rainwater flow speed is decreased, and the situation that the rainwater overflows from the upper end of the flow guiding pipe when the water flow is too large is also prevented at the same time on the premise that it is guaranteed that noise is lowered. The outer side of the outer pipe wall is wrapped by silencing cotton, and the effect of eliminating noise is further achieved.
Owner:WENDENG LANDAO ARCHITECTURAL ENG CO LTD
Camera flash lamp device for propaganda camera shooting
InactiveCN113946085AEasy to storeAvoid collisionTelevision system detailsColor television detailsInfraredFlashtube
A camera flash lamp device for propaganda camera shooting belongs to the technical field of propaganda camera shooting equipment. The shooting and recording effects are achieved, a rectangular shooting area is formed when four infrared light irradiation points irradiate a shooting face, the effect that a user can rapidly capture the shooting area through the four infrared light irradiation points is achieved, the two sides of an infrared emission head 21 are clamped through spring supporting pieces 201, and stability is improved when the infrared emission head 21 swings; the positions of the four infrared emission heads are adjusted by adjusting the knob rod; and the hidden microphone is convenient to store in the later period after being contracted, and the four sound insulation plates achieve the effect of isolating noise generated by equipment operation and can be controlled to be folded and unfolded when not in use. The protection belt plays a role in buffering and protecting the whole device, the two hands of a user can be inserted into the hand insertion grooves, and the effect that stable shooting can be carried out in a handheld mode is achieved.
Owner:ZHEJIANG CANCER HOSPITAL
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