69results about How to "Play the role of silencer" patented technology

The invention relates to a muffling device that includes box. The feature is that: muffling inner layer and reinforced outer layer are included in box. And the muffling layer is compounded by several muffling layer. Wood material is set at the middle of several muffling layers. And the reinforced layer is formed by wood material. The invention could sharply decrease the cost of material, lighten weight of box and improve muffling effect.

The invention discloses a height-adjustable test tube rack cleaning machine. The height-adjustable test tube rack cleaning machine comprises a workbench. The two sides of the top of the workbench are both provided with connecting rods. The surface of each connecting rod is connected with an extending and retracting spring in a sleeved manner. The top of the each connecting rod penetrates through a cleaner to be connected with a movable block in a penetrating manner. The connection portions between the two sides of the inner cavity of the cleaner and the connecting rods are movably connected through fixed rods and connection holes. The right side of each fixed rod is connected with a fixed block in a penetrating manner. A motor is arranged on the top of the cleaner. The bottom of the motor is provided with a rotating shaft. The bottom of the rotating shaft is provided with a main transmission wheel. The height-adjustable test tube rack cleaning machine can clean test tube racks of different sizes through mutual cooperation of the connecting rods, the extending and retracting springs, the fixed rods, the connecting holes, movable blocks, a holding plate, a through hole, chucks, rubber cushions, telescopic rods and springs, and therefore the cleaning effect on the test tube racks is better.

The invention relates to a pyrolysis furnace decoking gasification and purification as well as heat energy and material recovery device, comprising a tank body. The tank body is internally provided with a heat absorbing pipe, a water inlet pipe and a water outlet pipe, wherein, the water inlet pipe and the water outlet pipe are communicated with the heat absorbing pipe; the tank body is provided with an air inlet pipe and an exhaust pipe which are communicated with the inner chamber of the tank body; and the bottom of the tank body is provided with a solid/liquid material outlet. By adopting the device provided by the invention, the steam, coke powder, air and water in the waste gas from a pyrolysis furnace are separated, thus realizing 'four-phase separation'; the heat energy and the water resource in the waste gas are recovered; the emission is reduced; and the pollution on the environment is reduced. In the actual production, the device can directly replace a coke cleaning pot to operate.

The invention discloses a silencing structure of an air dryer. The silencing structure comprises at least two mounting seats; the mounting seats are in the shape of round tables; each mounting seat isprovided with an upper bottom surface, a lower bottom surface and a side surface connecting the upper bottom surface and the lower bottom surface, and the area of the upper bottom surface is larger than that of the lower bottom surface; the mounting seats are provided with conducting grooves; the lower bottom surface of one mounting seat extends into the conducting groove of the other mounting seat; gaps are formed between the side surfaces and the inner walls of the conducting grooves; silencing holes are formed in the side walls; and silencing pieces are distributed in the silencing holes.In actual use, the silencing structure consists of a plurality of mounting seats, in the process of air entering, the air enters along the side surfaces of the mounting seats and the inner walls of the conducting grooves and passes through the silencing holes, wherein the silencing holes are provided with the silencing pieces, on one hand, an air inlet channel is determined in this way, and on theother hand, the silencing function can be realized when the air enters the silencing pieces, so that wind noise is reduced.

The invention discloses a noise eliminating device for reducing the exhaust noise of an internal combustion engine. The noise eliminating device comprises a shell, wherein the shell comprises an innershell and an outer shell, a cavity is formed between the inner shell and the outer shell, an air inlet pipe is arranged on the left side of the shell, the air inlet pipe extends into the inner cavityof the shell, a first baffle is arranged in the inner cavity of the shell, a buffer groove is formed in the middle of the left side of the first baffle plate, the buffer groove and the air inlet pipeare located on the same horizontal plane, and noise eliminating pipes are arranged on the periphery of the buffer groove. Through the arrangement of the buffer groove, the airflow can play a role inbuffering when coming out of the air inlet pipe, and the air flow can circularly flow on the left side of the first baffle to reduce the noise; sound absorbing cotton is arranged on the inner surfaceof the buffer groove, so that when the air flow is transmitted to the buffer groove, the effect of absorbing noise is achieved; the noise eliminating pipes are arranged, so that air flow is transmitted to the right side of the first baffle from the left side of the first baffle; and first noise eliminating holes are formed, so that the energy of the air flow in the noise eliminating pipes is prevented from being attenuated, and the effect of noise eliminating is achieved.

The invention relates to an alloy glue-coated steel plate used for an automobile braking system and a sealing gasket, and a preparation method thereof. The alloy glue-coated steel plate employs a surface-deoxidized alloy steel plate as a substrate; and a single surface or double surfaces of the alloy steel plate are coated with a gelatinize layer. The main raw materials of the gelatinize layer are rubber latex and sulphur, carbon black, light calcium, etc. The alloy glue-coated steel plate can slow down impact, has rebound capacity, does not carbide and appear cracks at the temperature of 250 DEG C, and keeps the smoothness of a national first-level surface coating. Effects of sealing, damping and reducing braking noises can be achieved by coating a 10 [mu]m gelatinize layer on the double surfaces of the alloy glue-coated steel plate respectively.

The invention discloses a turbocharger with a remarkable noise reduction performance. The turbocharger comprises a turbine motor housing and a gas compressor housing, wherein a noise reduction layer is arranged on the inner wall of the turbine motor housing; an impeller of a gas compressor is connected with an impeller of a turbine motor through a turbocharger shaft; a vibration-damping gasket ismounted at one side of the impeller of the gas compressor; and micro holes are formed in the inner wall of the gas compressor housing. According to the turbocharger disclosed by the invention, the noise reduction layer is arranged on the inner wall of the turbine motor housing, so that noises generated in a working process of the impeller of the turbine motor are absorbed by the noise reduction layer, and the noise reduction effect is achieved on the turbocharger; the vibration-damping gasket is positioned on the end part of the turbocharger shaft, so that vibrations generated in the working process of the turbocharger shaft can be reduced, and buffer performance is improved, and therefore, noises generated by high-amplitude vibrations in the working process of the turbocharger shaft are reduced; and the micro holes are formed in the inner wall of the gas compressor housing, so that the noises generated in the rotation process of the impeller of the gas compressor are diffused throughthe micro holes, and therefore, the noise reduction effect is achieved.

The invention discloses a passenger compartment underframe internal mounting structure easy to demount for an urban rail vehicle. The passenger compartment underframe internal mounting structure comprises a side supporting shaft, a connecting strip, a floor pressing strip, a floor cloth, an aluminum honeycomb floor, a rubber cushion, a cold-proof material layer, profile mounting seats and a vehicle body underframe; the vehicle body underframe is mainly constituted by a plurality of transverse beams at the bottom of a passenger compartment of the vehicle and longitudinal beams welded to the twoends of the transverse beams, the multiple profile mounting seats parallel to the longitudinal beams are welded to the multiple transverse beams, the cold-proof material layer is laid on the positions, between the profile mounting seats, of the transverse beams, the rubber cushion is laid on the upper surface of the cold-proof material layer, and the upper part of the rubber cushion is covered with the aluminum honeycomb floor. When the passenger compartment underframe internal mounting structure needs to be demounted, the connecting strip can be conveniently taken out through certain elasticity among the connecting strip, a side wall plate and the floor pressing strip, and the demounting efficiency is improved. According to the passenger compartment underframe internal mounting structure, the machining precision requirements for fixing holes of the floor pressing strip on the vehicle body underframe can further be reduced, and through the adjustable connecting strip, the overall flatness and attractive degree is effectively ensured.

The invention discloses a pressurizing device and a pressurizing system of a Taiping kowkui tea machine. The pressurizing device comprises a tea filling tray (16), a rack (6) and an air cylinder (5) installed on the rack (6), wherein a piston rod of the air cylinder is provided with a threaded hole and is connected with a bulb screw rod (8); a bulb of the bulb screw rod (8) is matched with a ball socket end of a ball socket screw rod (10) mutually so as to form a ball socket joint; the ball socket screw rod (10) is connected to a round steel nut (11); the bottom of the round steel nut (11) is connected with a pressurizing plate. The pressurizing system of the tea machine comprises an air pump (1), a pressure-limiting valve (2) and an electromagnetic reversing valve (4), wherein an air source sequentially passes through the air pump, the pressure-limiting valve and the electromagnetic reversing valve, and enters the air cylinder; an opening A and an opening B of the electromagnetic reversing valve are respectively communicated with two air inlets of the air cylinder. According to the invention, tea leaves can be flattened by simulating a manual pressurizing technology, so that not only is the production efficiency ensured, but also the product quality can be ensured, and thus the processing technology of kowkui tea leaves is enhanced further.

The invention discloses a motor cabin with a variable frequency resonant cavity. The motor cabin with the variable frequency resonant cavity comprises a motor cover, a motor assembly, a motor housing, a clapboard-type silencer and a lower portion base plate. A suction inlet is formed in the top of the motor cover, an exhaust cavity is formed in the outer side of an exhaust gas filter, the variable frequency resonant cavity which is formed by a cavity protruded from the motor cover is formed in the motor cover which is arranged above the exhaust cavity, and the outer wall of the variable frequency resonant cavity is a soft tail end. The clapboard-type silencer is arranged at the intersection position of the outer wall of the motor housing located below the variable frequency resonant cavity and the exhaust cavity, and a plurality of clapboards arranged from top to bottom form a plurality of L-shaped sound eliminating cavities in the clapboard-type silencer. Due to the fact that the soft tail end can move as change of pressure difference of inner pressure and outer pressure, the motor cabin with the variable frequency resonant cavity can eliminate sound aiming at different working conditions.

The invention provides a noise-reduction energy-dissipation PVC pipe fitting for a high-rise building drainage system. The noise-reduction energy-dissipation PVC pipe fitting for a high-rise buildingdrainage system comprises a hollow main body with the top end open. A sealing cover is installed at the top end of the main body in a matched manner. A water inlet is formed in the left side wall of the main body. A water outlet is formed in the right side wall of the main body. A waterflow distribution and conflux plate with the rhombic cross section is arranged inside the main body in the mannerof being attached to the bottom surface of the main body and the bottom surface of the sealing cover. The waterflow distribution and conflux plate keep distance from the periphery of the inner wall of the main body. One of the two opposite angles of the waterflow distribution and conflux plate faces the water inlet, and the other one faces the water outlet. With the noise-reduction energy-dissipation PVC pipe fitting for a high-rise building drainage system, the defects that a PVC pipe is high in noise in drainage, and low in pressure bearing of drainage can be effectively overcome. Additionally, the noise-reduction energy-dissipation PVC pipe fitting for a high-rise building drainage system is convenient and quick to install, easy to operate, smaller in occupied space, and more importantly, more safe and reliable.

The invention discloses a safe self-locking mechanism for the electric door lock of an automobile. The safe self-locking mechanism comprises a shell body, a pawl assembly and a ratchet wheel, whereinthe pawl assembly and the ratchet wheel are both installed in the shell body through rivets; and the ratchet wheel is provided with a self-locking drive mechanism driving the ratchet wheel to rotate around the rivet of the ratchet wheel to enable the ratchet wheel to be clamped into a lock catch, the self-locking drive mechanism comprises a self-locking connection rod, a pull line and an executer,the self-locking connection rod is installed in the shell body through a rivet, one end of the self-locking connection rod is matched with the ratchet wheel, the other end of the self-locking connection rod is connected with the pull line, and the executer receiving and pulling the pull line is arranged at one end away from the self-locking connection rod, of the pull line. The safe self-lockingmechanism disclosed by the invention realizes unlocking and self-locking functions for the door lock of the automobile, is high in reliability, and greatly reduces potential safety hazards; and moreover, the door lock is high in stability, and has anti-shock and denoising functions while ensuring the service life.

The invention relates to a boiler waste heat recycling and steam temperature control system. By means of the boiler waste heat recycling and steam temperature control system, the temperature of air entering an air preheater can be raised, and cold air is prevented from corroding an air inlet pipe of the air preheater; meanwhile, condensed water of an evacuated steam source of a deaerator can be recycled effectively, waste of energy and resources is avoided, and environmental pollution is avoided; in addition, a heat exchange device is mounted in front of an air feeder, and the effect of suppressing noise of a draught fan is achieved; and meanwhile, the pressure difference between saturated steam and superheated steam of a steam pocket is utilized, the saturated steam is adopted for substituting desuperheating water to lower the temperature of a boiler, thus the service life of the boiler can be greatly prolonged, and the problems that pipes of a superheater burst and a desuperheater is damaged due to the fact that the temperature difference of the desuperheater is large are effectively solved.

The invention discloses a pattern tyre with the fixed rotation direction. The tyre is mounted in the fixed direction. A tread central region is composed of a tyre central peripheral rib and two vertical pattern grooves; S-shaped and C-shaped pattern grooves which extend from the tread central region to a tyre shoulder part are divided into tyre shoulder regions. Three arch-shaped pattern grooves are formed between the S-shaped and C-shaped pattern grooves and are used for communicating the vertical pattern grooves and the C-shaped pattern groove; one arch-shaped pattern groove which is only communicated with the S-shaped and C-shaped pattern grooves is formed in the part close to a tyre side edge. Tyre patterns are combined by the S-shaped pattern groove and the C-shaped pattern groove to form a single pitch; two arc-shaped sharp-knife-shaped pattern grooves and an anti-slipping fine groove are formed in each of blank regions of pattern gaps with different pitches. The directional pattern tyre can rotate in the fixed direction; the grounding performance of a tyre is not influenced and the water flow resistance can be alleviated; a water discharging speed is increased and an excellent anti-slipping performance on a wetland and a water accumulated road surface is provided.

The invention discloses a swing stopping device of a push-pull door, and relates to the technical field of swing stopping devices. The swing stopping device of the push-pull door comprises a supporting mechanism and an adjusting mechanism, the supporting mechanism comprises a support and an installation hole, and the support is composed of a bottom plate and two insert plates installed verticallyon one side of the bottom plate; the adjusting mechanism comprises two adjusting sliding blocks, and insert grooves used in conjunction with the insert plates are formed in one sides of the two adjusting sliding blocks; the sections parallel to the bottom plate on the adjusting sliding blocks are arranged as first sections, sections parallel to the bottom plate on the insert grooves are arranged as second sections, and horizontal center lines of the first sections are not in the same line as horizontal center lines of the second sections. According to the swing stopping device of the push-pulldoor, by arranging the support and by the insert grooves being detachably installed on the two adjusting sliding blocks, the insert grooves on the adjusting sliding blocks are located in the non-center positions of the adjusting sliding blocks, the difference of the opposite side surfaces of the two adjusting sliding blocks is manually controlled to realize the distance between the two adjustingsliding blocks, the push-pull doors of different thickness are conveniently adjusted and adapted, the structure is simple, and the cost is low.

The invention discloses an automobile engine damping device, relates to the technical field of engine production, and mainly solves the problem of short service life caused by engine vibration. The automobile engine damping device comprises a first support body, a first buffering layer, clamp plates, a second support body and a damping block, wherein the first buffering layer is arranged on the bottom of the first support body, the first buffering layer is filled with a foamed buffering material, the middle of the first buffering layer is provided with a groove, sliders connected in a slidingmanner are arranged in the groove, the clamp plates fixedly connected are arranged on the lower portions of the sliders, elastic rods are symmetrically arranged in the first support body in a left andright manner, first springs are arranged at the outer sides of the elastic rods in a sleeving manner, and the second support body is arranged above the first support body. The structure of the automobile engine damping device has a multi-buffering effect, thereby having an efficient damping effect, and at the same time, can carry out silencing cooling and fix and protect different sizes of engines.

The invention discloses a self-attracting door lock system of an automobile electric door. The self-attracting door lock system comprises an electric door lock, a pulling cable and a door lock executor; one end of the pulling cable is connected with the electric door lock; the other end of the pulling cable is connected with the door lock executor; the electric door lock comprises a door lock shell, a ratchet component and a ratchet wheel; the ratchet component and the ratchet wheel are both arranged in the door lock shell through rivets; the door lock executor comprises an executor shell, a pulling cable wheel and a rotation driving mechanism used for driving the pulling cable wheel to rotate; the rotation driving mechanism is located in the executor shell; the pulling cable wheel is located on the outer part of the executor shell; and the pulling cable wheel is provided with a pulling cable connection part connected with the pulling cable. By adopting the automatic door lock self-locking system, unlocking and self-locking functions of the door lock are realized; reliability is high; safety hazards are greatly lowered; and besides, the size of the door lock executor is thinner; greater output power is acquired; the pulling cable can be conveniently repaired and changed; and working load of repairing personnel is reduced.