86results about How to "With noise reduction effect" patented technology

The invention relates to an air purifier used for a fuel cell, which comprises an intake passage, an exhaust passage, an outer shell and an inner shell, wherein the intake passage and the exhaust passage are respectively arranged on the top and the bottom of the outer shell; the inner shell is arranged in the outer shell and is connected with the bottom of the outer shell, and space is reserved on the top of the inner shell and around the inner shell; at least one deflector and one filter cartridge are arranged in the inner shell; the deflectors are used as the supports of the filter cartridges, and the deflectors and the filter cartridges are arranged at intervals; the bottom of the inner shell is provided with a dust filter layer in front of the exhaust passage; the deflectors are provided with slots; the filter cartridges are arranged in adjacent deflectors; and the central positions of the slots of are staggered; the number of the deflectors and the filter cartridges can be determined according to intake attributes. In the invention, the polyporous deflectors can change the flow characteristic of the gas and ensure the even distribution of the airflow in the filter cartridges, and the shells of the double-layer purifier has the noise elimination function. The air purifier has the characteristics of noise reduction and low resistance and efficiently remove harmful gas and particles in the air.

The invention discloses an ABS / polyester alloy material as well as a preparation method and application thereof. The ABS / polyester alloy material comprises the following components by parts: 50-80 parts of styrene-butadiene-acrylonitrile resin, 10-65 parts of polyester resin, and 1.0-15 parts of a high-damping elastomer. According to the method disclosed by the invention, a polyester and high-damping rubber are introduced into an ABS system, so that the prepared ABS / polyester alloy material has excellent environmental stress cracking resistance while having a noise reduction effect, can replace ABS, HIPS or PC / ABS to be used for various plastic parts, can effectively reduce noise made by the parts, can greatly improve environmental stress cracking resistance of the parts, solve the problems of water leakage and cracking caused by the problem, and has significant technical and market value.

The invention discloses a multidirectional vibration and noise reduction motor base which comprises a carrier plate, a base body and a connecting seat. Bolt holes are formed in the carrier plate. Thebase body is fixed to the bottom of the carrier plate and is composed of a first seat body at the upper portion and a second seat body at the lower portion. A recessed cavity is formed in the top of the base body, the second seat body extends into the recessed cavity, a first vibration reducing spring is connected between the side face of the second seat body and the recessed cavity, and a secondvibration reducing spring is connected between the bottom face of the second seat body and the bottom wall of the recessed cavity. A shell wall of the base body is formed by compounding three steel plates arranged at intervals, and multiple rubber balls are embedded among the adjacent steel plates. By arranging the first vibration reducing spring and the second vibration reducing spring between the connecting seat and the base body, multidirectional vibration reduction can be performed, and a vibration reduction effect can be improved. The steel plates are matched with the base body made of the rubber balls and can be matched with the first vibration reducing spring and the second vibration reducing spring in use to achieve multi-step vibration reduction, and meanwhile the multidirectionalvibration and noise reduction motor base also has a noise reduction effect.

The invention discloses a tubular motor reduction gearbox with a protection mechanism. The tubular motor reduction gearbox comprises a motor and a reduction gearbox body, the reduction box body comprises an internal gear sleeve, a pressure sensor is arranged on the internal gear sleeve, and the pressure sensor is connected with a control switch; a connection sleeve with a positioning hole is arranged on a rotary shaft of the motor, a connection shaft is arranged in the reduction gearbox body, the interior of the connection shaft is provided with an internal cavity, a guiding block is arrangedin the internal cavity, and an elastic piece is arranged on the guiding block; the connection shaft is provided with a communication hole with a locking rod arranged in, the interior of the connectionshaft is provided with a cavity, the side wall of the locking rod is provided with a limiting block, and sleeved with a driving spring; and the side wall of the connection shaft is provided with a sliding groove communicated with the internal cavity, a sliding block is slidably connected with the interior of the sliding groove, the connection shaft is wound with a coil, and the two ends of the coil are connected with a control switch. The tubular motor reduction gearbox has the following advantages and effects that the effect of protecting the motor can be achieved by adopting the pressure sensor and the motor protection mechanism; the locking device has the effect of being convenient to mount and labor saving; and the stability is high, and the tubular motor reduction gearbox has the effect of noise reduction.

The invention discloses a key device, which comprises a bottom plate, a keycap and at least one balance bar, wherein each balance bar is a tabular body and arranged between the bottom plate and the keycap; and each balance bar is provided with a top plate and two side plates, the top plate and the side plates are made of a metal material, two side plates are connected with two ends of the top plate, one end, far away from the top plate, of each of the two side plates is connected to the bottom plate and the top plate is connected to the keycap. A plastic material is formed on at least one of the top plate and the two side plates of each balance bar, a composite structure is formed by each balance bar, and each balance bar is in contact with at least one of the keycap and the bottom plate through the corresponding plastic material. Therefore, insufficient strength of an existing balance bar can be reinforced; and coordination of the balance bars and the keycap and the bottom plate has relatively good accuracy, is not too loose or too tight and also has a silencing effect.

Disclosed is a noise elimination V-type ball valve with combined hole plates. A disk type spring gland 4 compresses a valve seat supporting ring 6 through a disc type pre-loaded spring 5; a valve body 2 and the valve seat supporting ring 6 are sealed through an O-type seal ring 9; a valve rod 17 drives a valve element 7 to rotate through a spline 8; the valve element 7 makes contacts with the valve seat supporting ring 6 to form a sealing surface; a packing gland 12 and the valve body 2 are compressed together through a bolt and nut component 13; the packing gland 12 compresses a packing material 10 through a packing shaft sleeve 11; a supporting frame 15 and the valve body 2 are compressed together through bolt and nut components 14; the packing material 10 is isolated from the valve rod 17 through a packing spacer 16; a pressure reduction hole plate 19 and a pressure reduction hole plate 20 are welded into the valve element 7; a noise elimination hole plate 21 and the valve body 2 are fastened together through an inner hexagon screw18; a base gland 1 is fastened to the valve body 2 through bolt and nut components 23; and the bottom of the valve element 7 rotates around a valve element rotary shaft 22 when the valve element 7 works.

The invention provides a ceiling type air conditioner indoor unit. The ceiling type air conditioner indoor unit comprises a shell, a heat exchanger and a laminar flow fan, wherein the shell is provided with air inlets and air outlets; the heat exchanger is arranged in the shell; the laminar flow fan is arranged in the shell, and comprises a plurality of annular disks which are arranged in parallelat intervals and are fixedly connected with each other; when the plurality of annular disks are driven to rotate, air is sucked into a cavity on a radial inner side from one axial end, and then air boundary layers on the surfaces of the annular disks are driven by the annular disks to rotationally move from inside to outside along a radial direction due to the viscous effect to form laminar flowwind, in order that air is driven to flow through the heat exchanger from the air inlets, and then flow to the air outlets in order to return to a room; two guide plates which are arranged oppositelyand rotationally are arranged on each air outlet; each guide plate is provided with a plurality of ventilation micro-holes along a thickness direction; and two guide plates can rotate in a deviating way to positions where the air outlets are opened, so that a channel formed between the two guide plates is used for guiding the air outlet direction, or rotate toward to each other to positions wherethe air outlets are closed, so that air outlet current is blown through the plurality of ventilation micro-holes.

The invention belongs to the technical field of daily life and particularly relates to a self-adaptive health-care mattress. The self-adaption health-care mattress comprises a bedstead, an inflation layer covering the upper end surface of the bedstead, first through holes, second through holes, multiple springs, an adjustment layer, multiple pressure sensors, second air cavities, an inflation pump and a microprocessor, wherein the first through holes and the second through holes are formed in the inflation layer in a through manner at equal intervals; the multiple springs are arranged in the second through holes in a through manner; the adjustment layer covers the upper end surface of the inflation layer; the pressure sensors are uniformly embedded in multiple grooves in the upper end surface of the bedstead; the second air cavities are uniformly embedded in the upper parts of the multiple pressure sensors in the multiple grooves in the upper end surface of the bedstead; the inflation pump inflates the inflation layer through an inflation pipeline. The self-adaptive health-care mattress is compact in structure and reasonable in design, the deformation state of the upper surface of the mattress can be quickly adjusted according to the weight of different users, and the sleeping quality and body health of users are guaranteed.

The invention discloses a conversation earphone. The conversation earphone comprises an earphone housing which encloses to form an internal cavity, the cavity is internally provided with a loudspeaker and a first microphone disposed in front of the loudspeaker, and the sounding direction of the loudspeaker is oriented forwards; and a first through hole connecting the outside of the earphone housing with the cavity is arranged at the front surface of the earphone housing, and the first through hole is arranged in front of the loudspeaker so that sound outside the earphone housing can be transmitted to the first microphone through the first through hole and sound emitted by the loudspeaker is transmitted to the outside of the earphone housing through the first through hole. By using the technical scheme provided by the invention, the conversation earphone can improve conversation sharpness and also has a noise reduction effect.

The invention discloses noodles suitable for middle-aged and aged people. The noodles comprise the following raw materials in parts by weight: 100-150 parts of flour, 20-35 parts of coarse rice powder, 18-23 parts of corn flour, 20-27 parts of soybean meal, 2-7 parts of bone meal, 3-8 parts of dried small shrimps powder, 11-19 parts of a functional traditional Chinese medicinal material extract solution, 12-17 parts of functional vegetables and fruits powder, 14-25 parts of a functional vegetables and fruits extract solution and 0.4-0.75 part of an edible low sodium salt. The noodles suitable for middle-aged and aged people can be used for conditioning the bodies of the middle-aged and aged people in daily diet and living, so that the health can be strengthened, the immunity is improved, the cancer is prevented, cardiovascular diseases are prevented, the blood pressure and blood fat are reduced, and the liver is protected. Through a processing method, the noodles can adapt to the production requirements of the noodles, so that relatively good quality is obtained.

The invention discloses a key device, which comprises a bottom plate, a keycap and at least one balance bar, wherein each balance bar is a tabular body and arranged between the bottom plate and the keycap; and each balance bar is provided with a top plate and two side plates, the top plate and the side plates are made of a metal material, two side plates are connected with two ends of the top plate, one end, far away from the top plate, of each of the two side plates is connected to the bottom plate and the top plate is connected to the keycap. A plastic material is formed on at least one of the top plate and the two side plates of each balance bar, a composite structure is formed by each balance bar, and each balance bar is in contact with at least one of the keycap and the bottom plate through the corresponding plastic material. Therefore, insufficient strength of an existing balance bar can be reinforced; and coordination of the balance bars and the keycap and the bottom plate has relatively good accuracy, is not too loose or too tight and also has a silencing effect.

The conventional noise reducing apparatus has a low noise reducing effect, and it requires a lot of time to mount the noise reducing apparatus on a soundproofing wall which in turn incurs high costs.The present invention provides a noise reducing apparatus including: a spiral member including a plate-shaped spiral portion having a spiral cross-section; two side shielding members for shielding theopened lateral sides of the spiral member; and a central member disposed in the spiral member and holding the two side shielding members tight to the spiral member, in order to improve an easiness ofthe installation and the noise reducing effect.

A three-in-one integrated test system for preventing condensation inside a vibration table comprises a temperature control box (1) and an electric vibration table (2). The system is characterized in that the electric vibration table (2) is covered with an isolating cover (3), and the inside of the isolating cover (3) is a closed cavity; a partition (31) is arranged in the upper portion inside the isolating cover (3); the inner edge of the partition (31) is in connected in a sealing manner to the outer wall of the body of the electric vibration table (2) and the outer edge of the partition (31) is in sealing connection with the inner wall of the isolating cover (3) in such a way that an air inlet chamber (7) is formed in the upper portion inside the isolating cover (3), and the air inlet chamber (7) is arranged around the gap between the upper end of the body of the electric vibration table (2) and a moving coil; the air inlet chamber (7) is provided with an air inlet (71), and the air inlet (71) is used to access dry air during low-temperature test; and the isolating cover (3) is provided with an air outlet (32).

The invention provides an RF steel plastic composite strengthened winding pipe. The RF steel plastic composite strengthened winding pipe comprises a pipe material body formed by spiral winding of a steel plastic composited strip, the strip comprises an inner layer and an outer layer, seal cavities distributed at equal intervals are formed between the inner layer and the outer layer, an I-shaped structure is formed by the cavity walls, the inner layer and the outer layer, and a steel strip with the I-shaped section is arranged in the I-shaped structure; the inner layer and the outer layer are made of RF polyethylene materials, and the interior of the inner side of the pipe material body is coated with a protection core layer. The RF steel plastic composite strengthened winding pipe has the beneficial effects that the steel strip is firm in positioning, and the pipe body rigidity is good.

The invention belongs to the technical field of daily life, and particularly relates to a hardness-adjustable health-care mattress. The hardness-adjustable health-care mattress comprises a bed frame, an inflation layer, first through holes, second through holes, a plurality of springs, an adjustment layer, a plurality of pressure sensors, second air cavities, an inflator pump and a microprocessor. The inflation layer covers the upper end face of the bed frame; the first through holes and the second through holes are formed in the inflation layer at uniform intervals in a communicated mode; the springs are arranged in the second through holes in a communicated mode; the adjustment layer covers the upper end face of the inflation layer; the pressure sensors are evenly embedded in a plurality of grooves formed in the upper end face of a frame body; the second air cavities are evenly embedded to the upper side of the pressure sensors in the grooves in the upper end face of the frame body; the inflator pump inflates the inflation layer through an inflation pipeline. The hardness-adjustable health-care mattress has the advantages of compact structure, reasonable design and capability of rapidly adjusting the deformation state of the upper surface of the mattress according to different weights of users to guarantee users' sleeping quality and physical health.

The invention discloses an HVAC external unit with easy fixing performance and a damping function in the technical field of air conditioners. The HVAC external unit comprises an external unit body anda fixing bottom plate, wherein two sets of fixing columns are mounted on the rear side of the fixing bottom plate, a reinforcing mounting plate is fixedly connected to the rear walls of the two setsof fixing columns, side plates are mounted on the left side and the right side of the fixing bottom plate, guide columns I are mounted on the inner walls of the side plates, clamping plates are mounted at the inner ends of the guide columns I, damping pieces I are mounted between the clamping plates and the side plates, guide columns II are mounted at the front side walls of the fixing columns, abutting plates are mounted at the front ends of the guide columns II, damping pieces II are mounted between the abutting plates and the front side walls of the fixing columns, and a mounting bottom plate is mounted at the top ends of guide columns III. The structure is simple, the external unit body is fixedly mounted through the reinforcing mounting plate at the rear sides of the fixing columns, mounting is stable, the fixing stability of the external unit body is greatly improved, and the fixing bottom plate breakage is avoided.

The invention discloses a one-dimensional synthetic aperture microwave radiometer SST inversion method based on deep learning, and the method comprises the following steps: firstly, building a data set for training and verifying a deep learning model, and providing data support for sea surface temperature inversion; Secondly, constructing a deep learning model coupled by an auto-encoder and a fullconnection layer to train the auto-encoder by a training data set, and enabling the auto-encoder to achieve the effect of reducing data errors; Then, connecting a full connection layer behind a decoding layer of the auto-encoder, constructing a complete deep learning model, taking the output of the auto-encoder as the input of the full connection layer, and finely adjusting the whole full connection layer through a minimization loss function so as to invert the sea surface temperature; Finally, verifying the whole deep learning model through the verification data set. The problem that inversion of the sea surface temperature is difficult under the condition of multiple incidence angles is solved, and the inversion efficiency is improved.

The invention relates to a pectinate flexible variable-damping rubber plate and a processing method thereof. The pectinate flexible variable-damping rubber plate is formed by connecting the tail portions of a plurality of pectinate rubber sheet strips by connecting rubber sheets, and there is a spacing between adjacent two of the pectinate rubber sheet strips; and each of the pectinate rubber sheet strips is composed of an upper layer rubber sheet, a lower layer rubber sheet, silencing holes, and a plurality of small-diameter stainless steel balls and a plurality of large-diameter stainless steel balls arranged between the upper layer rubber sheet and the lower layer rubber sheet, and each of the silencing holes has a stepped hole structure and is composed of an upper hole and a lower hole which are connected. The variable-damping rubber plate can effectively reduce the damping, reduce noises, absorb the noises, and improve the working environment of workers, so the efficient processing speed of high-speed processing is increased, thereby the processing and environment qualities of an enterprise are improved.

The invention discloses a gear power transmission device with a noise reduction function, which comprises a housing on which several heat dissipation ports are opened; a soundproof room, a motor, a gear set and a planetary gear set assembly are arranged in the housing; the motor It is installed in the soundproof room, the motor is provided with a motor output shaft, and the motor output shaft extends out of the soundproof room; the first gear is set on the motor output shaft; the gear set includes the second gear, the transmission shaft, the third gear and the output shaft; A gear meshes with a second gear, the second gear is sleeved on the transmission shaft, and the transmission shaft is fixed on the casing through a bearing seat. On the one hand, the present invention is convenient for design and manufacture, and on the other hand, it has the effects of shock absorption and noise reduction of the gear transmission.

The invention discloses a split type easy-to-disassemble skirting line. The split type easy-to-disassemble skirting line comprises a fixed bottom plate and a decorative panel. The fixed bottom plate and the decorative panel are connected through a mortise mechanism. According to the skirting line, a single structure of a traditional skirting line is abandoned, and a split type combined structure is adopted. A wiring cavity is formed in the fixed bottom plate. The technical problems that in the prior art, an exposed wiring duct laid on a skirting line is not attractive and occupies space are solved. A noise-reduction sealing layer is arranged at the attaching position of the decoration panel and a wall body, therefore the skirting line has a silencing effect. In addition, a combination of arock wool layer and an aluminum foil layer serves as a fireproof layer, aluminum-foil paper is pasted to the outer side of the rock wool layer, the rock wool layer is prevented from absorbing water and being damped, and durability is enhanced. The split type easy-to-disassemble skirting line is compact in structure, reasonable in design, rapid and convenient to disassemble and assemble, firm andstable in structure after being installed, not prone to disengagement, good in fire resistance, high in safety and suitable for market application and popularization.

The invention provides ocean tide pump water equipment. The ocean tide pump water equipment comprises an upper floating plate,, a top plate, an outer cavity and a lower floating plate, wherein the upper floating plate is connected with the top plate through the outer cavity, the upper floating plate is installed at the middle upper end of the outer cavity, the lower floating plate is installed atthe bottom of the outer cavity, an inner cavity is formed in the outer cavity, water pumping parts are arranged in the top plate and the outer cavity, and a conveying part is arranged in the lower floating plate. In ebb tide, the seawater pushes a swirling plate to rotate with a screw rod as the circle center, a certain pressure of the seawater can be reduced, meanwhile an inclined swirling platecan be utilized to force the flow direction of the seawater to reverse flow along the inclined surface of the swirling plate, thus reverse vortex is generated, the flow rate of the seawater can be further reduced, with the continuous up and down rotation of a deflector, the seawater is diverted and dispersed, meanwhile the garbage in the seawater can be intercepted by an intercepting net installedon the deflector, and thus unpowered recycling is achieved while the flow rate of the seawater is reduced.

The invention discloses a pump-turbine with a shock absorption structure. The pump-turbine with the shock absorption structure comprises a bearing base, a first slide rod, a second slide rod and a second drive motor, wherein a shock absorption plate is fixed to the upper end of the bearing base; the head end and the tail end of each of the first slide rod and the second slide rod are fixed to thefirst slide rod separately; a limit stop block is installed on the outer wall of the shock absorption plate; a movable frame is connected to the upper end of the fixed frame; the second drive motor isinstalled in a waterproof storage frame, and a blade is connected to the output end of the second drive motor; and a lower ring is installed at the lower side of the outer wall of the blade, and an upper crown is installed at the upper side of the outer wall of the blade. In the pump-turbine with the shock absorption structure, the bearing base has the function of stably supporting for the pump-turbine, so that improvement for the balance performance during the working of the pump-turbine is benefited, and the case of collapse in the working process of the pump-turbine due to too high water flow, is avoided; and moreover, the shock absorption plate has the function of shock absorption and buffer for an amplitude generated by the pump-turbine in the working process.

The invention discloses a muffling tail pipe with a decorative pipe, which comprises a tail pipe and the decorative pipe, wherein the tail pipe is inserted into the decorative pipe of which the caliber is larger than that of the tai pipe; the tail end of the tail pipe is made into a horn mouth; the end face of a large-mouth end is firmly welded with the inner wall of the decorative pipe; the pipe body of the tail pipe is provided with a plurality of small holes; an end cover covers the front end of the decorative pipe and is sleeved on the tail pipe, the inner ring edge of the end cover is airtightly welded with the outer wall of the tail pipe, and the outer ring edge of the end cover is airtightly welded with the decorative pipe; the outer wall of the part of the tail pipe, which is inserted into the decorative pipe, the end cover and the inner wall of the decorative pipe jointly enclose to form an expansion chamber. Through the tail pipe with the decorative pipe with the structure, the spatial structure is effectively utilized, the chassis space is not occupied, and different muffling requirements can be met; impedance can be generated by the change of a section formed between the horn mouth of the tail pipe and the decorative pipe to achieve certain muffling effect; meanwhile, the horn mouth can reduce gas flow and reduce exhaust back pressure.

The invention provides a head and face size and shape classification method based on three-dimensional point cloud coordinates. The head and face number type classification method comprises the stepsthat 1, head and face three-dimensional point cloud data are collected; 2, key parameters are defined, and key point radiuses are obtained; 3, data processing is performed to obtain a final head and face data model; and 4, according to the final head and face data model, head size and shape classification is completed through principal component analysis. The step 3 comprises the following sub-steps: step 31, denoising the acquired head and face three-dimensional point cloud data; step 32, for the denoised point cloud data, performing coordinate adjustment on each grid vertex of the data model; 33, filling a hole; and 34, carrying out fairing. According to point cloud data obtained through three-dimensional scanning, shape information and curved surface information of the head and the faceare comprehensively considered; the data processing process is completed by selecting the data processing template, the data restoration and noise reduction effects are achieved, and the analysis efficiency is improved; and meanwhile, principal component analysis is creatively carried out on point cloud coordinates, so that the accuracy of head number size and shape classification is improved.

The invention discloses an oil-gas separation part structure which comprises a part body and is characterized in that a plurality of grid plates are distributed on the surface of the part body. The grid plate structures distributed in a staggered way are adopted, so that the gas reflux path is effectively added, the gas-liquid reflux effect is improved, oil fog drops are rebounded for multiple times and collide with each other to form larger oil drops, and the larger oil drops are collected on the surfaces of the grid plates; and the oil-gas separation part is high in separation efficiency, simple in structure and low in manufacturing cost, has a certain noise reduction effect, and is very good in practicality, easy to popularize and apply and suitable for all oil vacuum pumps and compressors.

The invention provides a light unmanned helicopter tail rotor aerodynamic appearance and belongs to the technical field of helicopter aerodynamic design. The airfoil profile thickness of each tail rotor blade of a helicopter ranges from 10% to 14% from the position A away from the rotation center of the blade to a blade tip, and the torsion rate of each tail rotor blade of the helicopter is X fromthe position B away from the rotation center of the blade to the blade tip, wherein A ranges from 0.31 R to 0.35 R, B ranges from 0.32 R to 0.35 R, X ranges from -8.01 degree / R to -7.99 degree / R, andR is the radius of a circle formed when each tail rotor blade rotates. By the adoption of the design of the light unmanned helicopter tail rotor aerodynamic appearance, the tension capacity of a tailrotor can be improved, meanwhile, the hovering efficiency of the tail rotor in the usable tension range section is improved, the power required by the helicopter tail rotor is reduced, and meanwhilea certain noise reduction effect is achieved.

The invention discloses an aluminium pipe. The aluminium pipe comprises an inner-layer aluminium pipe body and an outer-layer aluminium pipe body, wherein a Teflon-coated layer is arranged on the inner side of the inner-layer aluminium pipe body; a hollow layer is arranged between the inner-layer aluminium pipe body and the outer-layer aluminium pipe body; a fluororesin anti-corrosive coating is arranged on the outer side of the outer-layer aluminium pipe body; and reinforcing ribs are arranged on the outer surface of the inner-layer aluminium pipe body and the inner surface of the outer-layer aluminium pipe body, so that the strength of the aluminium pipe is enhanced. The aluminium pipe has the advantages that scaling in the pipe does not occur easily, the outside of the pipe cannot be corroded easily, and the pipe is high in strength.

The invention provides a double-layer drainage asphalt pavement pore structure attenuation law analysis method, belongs to the technical field of drainage asphalt pavements, and solves the problems that the secondary compaction of the double-layer drainage asphalt pavement by running wheel loads and upper and lower drainage asphalt structural layers of the double-layer drainage asphalt pavement are not considered after dust particle deposition in the existing double-layer drainage asphalt pavement pore attenuation research. A particle bed layer is generated by using discrete element software to serve as a double-layer drainage asphalt pavement combination model, then bonds are generated among aggregate particles to form bonding strength to serve as the double-layer drainage asphalt pavement combination model, kinematics setting is added to a wheel model, and finally, the attenuation law of the pore structure of the double-layer drainage asphalt pavement is explored through calculationin a DEM-MBD coupling mode. The method can be used for effectively analyzing the attenuation law of the pore structures of the upper and lower layers of the double-layer drainage asphalt pavement andthe influence of secondary compaction after the running wheel load acts on different amounts of deposited dust, and has important practical significance.

The invention discloses a noise reduction type C-shaped contact rail supporting device which comprises a clamping head mechanism, a mounting mechanism, a locking mechanism and an insulating mechanism, and the mounting mechanism is arranged at one end of the insulating mechanism; the clamping head mechanism is provided with a clamping head assembly, the length of the long side of the clamping head assembly is larger than the height of the notch of the C-shaped contact rail, and the length of the short side of the clamping head assembly is smaller than the height of the notch of the C-shaped contact rail. The clamping head mechanism has a first state and a second state. When the clamping head mechanism is in the first state, the long edge of the clamping head assembly is perpendicular to the groove height direction of the C-shaped contact rail. When the clamping head mechanism is in the second state, the long edge of the clamping head assembly is parallel to the groove height direction of the C-shaped contact rail; the locking mechanism is arranged on the mounting mechanism and movably connected with the clamping head mechanism so as to be used for locking the clamping head mechanism to be in the first state or the second state. The device can be in self-adaptive contact with the machining error size of the C-shaped groove of the strand rail body, zero-clearance fit supporting of the rail body is achieved, and the phenomenon that the clamping head assembly swings and deviates from a working position in the using process can be avoided.

The invention discloses a gear structure. The gear structure comprises a shell, and a plurality of radiating openings are formed in the shell; a sound-proof room, a motor, a gear set and a planetary gear set assembly are arranged in the shell; the motor is arranged in the sound-proof room, and a motor output shaft is arranged on the motor and extends out of the sound-proof room; the motor output shaft is sleeved with a first gear; the gear set comprises a second gear, a transmission shaft, a third gear and an output shaft; and the first gear is meshed with the second gear, the second gear is arranged on the transmission shaft in a sleeving manner, and the transmission shaft is fixed to the shell through a bearing base. By means of the gear structure, on one hand, convenience is brought to design and manufacturing; and on the other hand, the damping and noise reduction effects of the gear transmission device are achieved.