199results about How to "Improve mute effect" patented technology

The electromagnetic valve comprises a valve shell, a valve seat, an electromagnetic coil, a valve element, a static iron core and a movable iron core, the valve element, the static iron core and the movable iron core are connected into the valve shell, and an elastic piece is connected between the movable iron core and the static iron core; the buffering assembly comprises a first buffering piece and a second buffering piece, and the first buffering piece is connected to the end, close to the static iron core, of the movable iron core and outwards extends out of the end face of the movable iron core in the axial direction. The second buffer piece is connected to one end, close to the movable iron core, of the static iron core and extends out of the end face of the static iron core in the axial direction; the projection of the first buffering piece in the axial direction of the valve shell and the projection of the second buffering piece in the axial direction of the valve shell do not coincide, and when the electromagnetic coil is electrified to enable the movable iron core to move in the direction close to the static iron core, the first buffering piece abuts against the static iron core, and the second buffering piece abuts against the movable iron core. According to the electromagnetic valve, hard impact between the movable iron core and the static iron core due to inclination can be effectively prevented, the impact strength between the movable iron core and the static iron core can be effectively reduced, and the mute effect is good.

The utility model relates to the field of air cushion beds, in particular to a damping control box with a suspension system and an inflatable bed using the damping control box. The utility model provides a damping control box with a suspension system, which comprises a hollow shell, an air pump, a main air box, an electromagnetic valve and a control circuit board, the air pump, the main air box and the electromagnetic valve are arranged in the hollow shell, and the air pump is communicated with the main air box and the electromagnetic valve through an air path. The control circuit board can control the air pump and the electromagnetic valve to work, a suspension system with a suspension frame is arranged in a cavity of the shell, the air pump, the main air box, the electromagnetic valve and the control circuit board are all arranged on the suspension frame, and the suspension frame can be suspended in the inner cavity of the shell through the suspension system for shock absorption. The air pump, the air box and the like are integrally hung and installed in the control box through the hanging system, vibration generated by work of the air pump and the like and influences on the shell are relieved through damping of the hanging system, and therefore the sleep quality is improved. The utility model further provides an inflatable bed using the control box, and the inflatable bed is silent in use and good in sleep quality.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

The utility model relates to generator set auxiliary equipment technical field discloses a diesel generating set mute big cover convenient for overhauling, including cover body, the cover body top is equipped with the cover body that is composed of two symmetrical cover plates, and the cover plate is through the sliding block and the inverted T type sliding slot of cover body top sliding fit, the inner wall of cover body is equipped with buffer mechanism, and the support arm of buffer mechanism is supported through the elastic support rod, and the support arm end is equipped with gyro wheel no.

This invention provides a wind-cooled horizontal freezer and its operation control method. The freezer includes: an inner liner having a bottom wall and a stepped wall bent upwards from the bottom wall; a cover plate installed in the inner liner, forming a refrigeration chamber with the inner liner, wherein an evaporator in the refrigeration chamber is arranged side by side with the stepped wall in the left-right direction; multiple air outlets located in the upper part of the storage compartment; an auxiliary air outlet located in the lower part of the storage compartment; and a control system configured to: upon receiving a compressor start command, control the compressor to run, control the fan to run, and control the fan to deliver air to the storage compartment through the multiple air outlets but not through the auxiliary air outlets; during this process, when a human body signal is sensed, control both the multiple air outlets and the auxiliary air outlets to deliver air, or control the multiple air outlets to stop delivering air while the auxiliary air outlets deliver air.

The utility model discloses an interior door with a mute structure, and relates to the technical field of mute doors, in particular to the interior door with the mute structure, which comprises a door frame, a door body is mounted on the inner wall of one end of the door frame through hinges in a hinged manner, and left and right mute mechanisms are arranged on the door frame and used for sound insulation of the left and right ends of the door frame after the door is closed. The door body is provided with an up-down mute mechanism and used for sound insulation of the upper end and the lower end of a door frame after the door is closed, the up-down mute mechanism comprises a sealing assembly, the sealing assembly comprises sealing strips which are slidably installed at the upper end and the lower end of the interior of the door body in a penetrating mode, and guide rods are fixed to the two sides of the inner ends of the sealing strips. In daily use, gaps still exist at the top end and the bottom end of a door body, a conventional mode is that a sound insulation strip is installed at the end of the door body, however, the sound insulation strip can be abraded in the long-time opening and closing process of the door body, and the sound insulation effect after the door is closed is affected.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

The utility model discloses an electronic valve and refrigeration equipment relates to refrigeration control technical field, wherein, electronic valve electronic valve, including lower valve seat subassembly, upper valve seat subassembly, valve needle subassembly and silencer, and lower valve seat subassembly is equipped with the intercommunication and valve mouth, and the valve cavity is formed with upper valve seat subassembly together, valve needle subassembly can be installed in upper valve seat subassembly, is used for opening and closing valve mouth, silencer is located in valve needle subassembly periphery, and its lateral wall is equipped with the sound attenuation hole, and the bottom is sealed butt joint with valve mouth circumference, and the upper end is spaced apart with upper valve seat subassembly, forms the flow passage of refrigerant circulation. Through setting up the silencer with the sound attenuation hole around the valve mouth, the big bubble in the refrigerant is refined into the small bubble, reduces the noise when its breakage, realizes efficient noise reduction. Since the main noise source concentrates in the valve mouth area, this arrangement can realize accurate noise reduction, and improve the overall mute performance. The flow passage formed between the silencer and upper valve seat subassembly helps impurities to be discharged with the refrigerant smoothly, avoids entering the transmission component gap.

The utility model relates to the field of microswitches, in particular to a mute type microswitch. The problems that noise is generated due to friction, collision and vibration between mechanical structures when an existing microswitch is switched on and off, and noise disturbance is easily caused in special occasions such as libraries and hospitals are solved. Compared with a traditional microswitch, the microswitch comprises the main body assembly, the sealing assembly and the sound insulation assembly, and the two groups of symmetrically arranged silencers are arranged in the shell, so that the silencing effect can be achieved, the sound generated in the working process of the internal structure can be greatly weakened, and the service life of the microswitch is prolonged. The damping modules are arranged on the normally-closed contact and the normally-open contact, so that the damping effect can be achieved in the vibration process of the normally-closed contact and the normally-open contact, noise is reduced by reducing the amplitude, the sound insulation assembly can conduct sound insulation, and under the multiple sound insulation and silencing effects of the silencer and the sound insulation plate box sound insulation assembly, the sound insulation effect of the normally-closed contact and the normally-open contact is improved. And noise is not easy to generate in the working process.

The utility model relates to the technical field of air compressors, and particularly discloses an air compressor with a bottom air inlet structure, the air compressor comprises a bottom plate, a top plate, a back plate, a panel and two side plates, the back plate, the panel, the side plates, the bottom plate and the top plate are connected to define a closed working cavity, and a first air inlet channel for air flowing is formed in each side plate; a first air outlet hole is formed in the side wall, close to the working cavity, of the first air inlet channel; the bottom plate is provided with a second air inlet hole, and air flows into the first air inlet channel through the second air inlet hole and enters the working cavity through the first air outlet hole. The air inlet holes are all located below the air compressor and hidden in position, the overall attractiveness and the design sense of the air compressor are effectively improved, and the space limitation is small when the air compressor is used; an airflow wall is formed when air flows in the air inlet channel from bottom to top, part of noise spread through airflow can be blocked, and the mute effect of the air compressor is improved.

The utility model discloses a silent aluminum profile frame applied to sliding doors and windows, which relates to the technical field of aluminum profile silence and comprises an aluminum profile frame body, a first mounting groove is formed on one side of the aluminum profile frame body, and a first magnetic belt is mounted on the inner bottom wall of the first mounting groove; a mounting seat is slidably arranged on the first mounting groove, and the sliding direction of the mounting seat on the first mounting groove is the same as / opposite to the door and window impact direction; a second magnetic belt corresponding to the first magnetic belt is mounted on the mounting seat, and the magnetic pole directions of the corresponding magnetic pole faces of the first magnetic belt and the second magnetic belt are the same; a damping contact piece is installed on the side, back on to the first magnetic force band, of the installation base and penetrates out of the first installation groove in the direction away from the first magnetic force band, and when the damping contact piece is aged, the magnetic repulsive force generated between the first magnetic force band and the second magnetic force band can still continuously counteract the impact force. As a silence and shock absorption auxiliary structure, the silence and shock absorption auxiliary structure has good silence and shock absorption effects and good applicability.

The present invention discloses a wing-span type power supply vehicle, comprising a chassis and a body, wherein the body has a body wall for noise reduction, sound absorption and sound insulation, the front and rear parts of the body are respectively provided with an air intake noise reduction system and an air exhaust noise reduction system, and the side of the body is provided with a wing panel that can be deployed and closed. Under the condition of ensuring sufficient air circulation in the body, the noise of the air intake and exhaust air flow and the propagation to the outside of the body caused by the equipment such as the generator set in the body are effectively reduced, and noise pollution to the workplace is avoided, so that the overall mute effect of the power supply vehicle is significantly improved when it is working, and at the same time, it has good air circulation performance. By arranging the wing panels that can be deployed and closed on the side of the body, the removal and overhaul and maintenance of the equipment such as the generator set are greatly facilitated, and the large equipment such as the generator set can be removed without disassembling the body, and the overhaul and maintenance are convenient, efficient, safe, stable and reliable.

The invention discloses a self-repairing mute tire and a preparation method thereof, and relates to the technical field of tires, the self-repairing mute tire comprises a tire body, and a self-repairing rubber layer and a mute material which are sequentially attached to the inner wall of the tire body from inside to outside; the self-repairing adhesive layer is prepared from the following components: epichlorohydrin rubber, acrylate rubber, a rosinyl phenyl phosphine oxide isoxazolyl functional polymer, 4, 4-chloroformyl phenyl ether, a catalyst, 2, 2-bis [4-(4-aminophenoxy) phenyl]-1, 1, 1, 3, 3, 3-hexafluoropropane, trithiocyanuric acid, a filler, an accelerant TMTD (Tetramethylthiuram Disulfide) and an auxiliary agent; the rosinyl phenyl phosphine oxide isoxazolyl functional polymer comprises structural units introduced through a condensation polymerization reaction of the following monomers: glycerol triabietate, bis (4-carboxyl phenyl) phenyl phosphine oxide and 3, 5-isoxazoledicarboxylic acid. The tire is remarkable in self-repairing effect, good in mute performance, sufficient in performance stability and long in service life.

The invention provides a water-cooled condenser and a refrigerator with the same, the water-cooled condenser comprises a condenser pipe, a refrigerant cavity used for circulating a refrigerant and a cooling cavity used for circulating cooling water are arranged in the condenser pipe, the refrigerant cavity and the cooling cavity are mutually independent, and the condenser pipe is coiled to form a water storage frame used for containing defrosting water. Traditional fan cooling is omitted, flowing circulating water is used for cooling the condenser, the mute performance is better, an evaporating pan is replaced with the condenser pipe arranged in a spiral winding mode to contain defrosting water, water circulation and defrosting water two-way cooling are achieved, meanwhile, a fan, a traditional condenser and an evaporating pan are replaced, the cost is low, and the occupied space is small.

The utility model discloses an air suspension vehicle's distribution valve regulation sound eliminating structure and automobile, the air suspension vehicle's distribution valve regulation sound eliminating structure includes suspensions and gaskets, the suspensions are arranged on two symmetrical points on the side surface of a distribution valve, and the gaskets are respectively arranged on two symmetrical sides of a suspension connecting line on the bottom surface of the distribution valve. When the distribution valve works, the valve port is opened and closed, the suspension on the side face of the distribution valve and the gasket play a role in vibration isolation, sound transmission is eliminated, vibration isolation is carried out on a transmission path, and in the bumping process of a vehicle, the gasket arranged on the bottom face of the distribution valve plays a role in Z-direction supporting, so that the durability of the suspension on the side face is improved, and the service life of the distribution valve is prolonged. The design with high cost performance not only improves the comfort and mute performance of the vehicle, but also brings more pleasant driving experience to the vehicle owner.

The utility model discloses building decoration gypsum board, including the same length's decorative board and bottom plate, the outside processing of decorative board has the decorative pattern, and the both sides integral type fixed connection of decorative board has the side wall batten, and two side wall batten and decorative board form the half -enclosed structure to decorative board inboard, the width of bottom plate and the interval between two side wall batten inboard match, the intercalation of through connecting component between decorative board and bottom plate is matched, and the outside of bottom plate and the lower edge of side wall batten are flush after the intercalation of decorative board and bottom plate, and form between decorative board and bottom plate. The utility model first according to the layout, fix bottom plate on the wall, form the main frame of entire decorative wall surface, after installing accurately, intercalate decorative board on bottom plate through connecting component again, like this can avoid the secondary disassembly damage decorative board caused by the experience of subsequent installation personnel, measurement error, layout error etc.

The utility model provides a kind of high-speed fan, including: motor assembly;Fan shell, sleeve joint motor assembly, the direction of the air flow produced by the outer periphery of cooperation motor assembly is formed into air inlet end and air outlet end respectively, the surface of motor assembly located at air outlet end is equipped with several self central outward helical extension's air deflector;Annular air inlet cover, connect the air inlet end of fan shell;And arc air outlet cover, connect the air outlet end of fan shell, the outer wall of fan shell, the inner wall of arc air outlet cover is divided by air deflector and is formed into several helical air ducts arranged in ring, air flow produced by motor assembly is shunted as sub-air flow by helical air duct, and sub-air flow is independently emitted outward from the air outlet opening in the center of arc air outlet cover.The utility model can improve air duct structure, effectively increase the air output of fan under the premise of constant motor power, and improve the effect of silence.

The utility model discloses a mute dry filter of a vehicle-mounted refrigerator, which particularly relates to the technical field of vehicle-mounted refrigerators and comprises an outer pipe, the left end of the outer pipe is an inlet end used for being connected with a low-pressure side, the right end of the outer pipe is an outlet end used for being connected with a high-pressure side, and the middle of the outer pipe is a molecular sieve filling space for loading molecular sieves. An inlet end filter screen assembly, an elastic assembly and a limiting molecular sieve filter screen assembly are sequentially arranged at the left end of the molecular sieve filling space from left to right, and an outlet end filter screen assembly is arranged at the right end of the molecular sieve filling space. The inlet end filter screen assembly is in fastening connection with the inner wall of the outer pipe, and the limiting molecular sieve filter screen assembly is in sliding connection with the inner wall of the outer pipe. The movable space of the molecular sieve is reduced through the elastic assembly, so that the noise reduction effect is achieved in the mode of reducing collision of the molecular sieve, and the comfort in a vehicle is improved.

This invention discloses a control method, storage medium, and air conditioner for silent operation of an air conditioner, belonging to the field of air conditioning control technology. The method includes: when the unit is in cooling mode, if a silent operation command is received, the following steps are executed: detecting the unit's low operating pressure; if the unit's low operating pressure is within a target low pressure range, then successively reducing the compressor frequency according to a set first gradient until the unit's low operating pressure after the compressor frequency reduction exceeds the upper limit of the target low pressure range; then controlling the compressor to operate at the frequency adjusted in the previous reduction; and detecting the unit's high operating pressure after the compressor operates at this frequency; if the unit's high operating pressure is within a target high pressure range, then successively reducing the outdoor fan speed according to a set second gradient until the unit's high operating pressure after the outdoor fan speed reduction exceeds the upper limit of the target high pressure range; then controlling the outdoor fan to operate at the speed adjusted in the previous reduction. Using this invention, while ensuring that the unit's basic capabilities meet requirements, the compressor frequency and outdoor fan speed can be further reduced, optimizing the silent operation effect.

The embodiment of the utility model provides a noise reduction structure, a fresh air module and an air conditioner, the noise reduction structure comprises a structure body, a plurality of noise reduction sub-cavities are formed in the structure body, and any two noise reduction sub-cavities have different depths; a plurality of first through holes are formed in the surface of the structure body, and each silencing sub-cavity corresponds to the first through holes and communicates with the first through holes.

This utility model provides an indoor unit for an air conditioner. The indoor unit includes a housing, multiple swing blades, and a drive device. A support frame is provided inside the housing, and an air outlet is provided on the housing. Multiple swing blades are disposed inside the housing and adjacent to the air outlet; the multiple swing blades are arranged sequentially and at intervals along the length of the air outlet on the support frame; each swing blade includes a fixed part and a movable part, the fixed part and the movable part are connected, the fixed part is located on the air inlet side of the movable part, the fixed part is fixedly set to the support frame, and the movable part is made of a flexible material. The drive device is configured to drive the movable part to swing relative to the fixed part, and is configured such that the swing direction of at least one movable part is different from the swing direction of the other movable parts. This utility model solves the problem of the single air supply mode of existing air conditioner indoor units, thereby improving the diversity of air supply modes, making the airflow of the air conditioner more natural, reducing the direct blowing sensation of the airflow, and improving the user experience.

The invention provides a particle damper for vibration reduction of a wing structure, which comprises a bottom plate, a cover plate and a box body symmetrically arranged on the bottom plate, a plurality of damping particles and metal grids parallel to each other are placed in the box body, and a damping layer is attached to the inner wall of the box body. When the main beam vibrates due to external disturbance of the wing, the damping particles vibrate along with the main beam and collide and rub with the metal grating and the damping layer in the vibration process, vibration energy is effectively converted into heat energy, and therefore dissipation of the vibration energy is achieved, the vibration amplitude of the main beam of the wing is remarkably reduced under the condition that the structure of the wing is not changed, and the service life of the wing is prolonged. Not only is the influence of vibration on the performance of the wings effectively reduced, but also the purpose of noise reduction is achieved, and the mute performance and the riding comfort of the aircraft are improved.

The utility model discloses a mute motor with a double-bearing mechanism, which relates to the technical field of motors and comprises a first supporting block, a first bearing ring, a second bearing ring, a rotor connecting rod and a second supporting block. A first bearing ring is installed on the first supporting block, a rotor connecting rod is installed in the first bearing ring, a water inlet connector is formed in the right side of the first supporting block, and a water outlet connector is installed below the water inlet connector. And the circulating water cooling pipeline can also play a supporting role and strengthen the structure of the motor, and sound insulation cotton, foam and other filling materials are placed between the interior of the silencing protection shell and the circulating water cooling pipeline, so that the generated noise can be reduced to the minimum degree under the condition that the structural strength and the load power of the motor are not influenced.

The utility model discloses a double-layer shell high-strength corrosion-resistant valve which comprises a valve body, a valve shell is arranged outside the valve body, a valve element is arranged in the valve shell, and the two ends of the valve shell are fixedly connected with pipelines communicated with the valve shell. The two pipelines are slidably connected with protective shells matched with the valve shell in a sleeving mode, the opposite ends of the two protective shells are open, sound insulation cotton is fixedly connected to the inner walls of the protective shells, and the two pipelines are fixedly connected with fixing plates in a sleeving mode. The valve is reasonable in structure, the protective shell is arranged outside the valve shell, noise generated when the valve body works can be effectively isolated through the sound insulation cotton arranged in the protective shell, the mute effect of the valve body can be greatly improved, meanwhile, the valve shell can be protected, and the service life of the valve body is prolonged. And external collision and dust pollution are avoided.

This utility model discloses a hinge structure for a door frame, including a first leaf plate and a second leaf plate. The top and bottom of the first leaf plate near the second leaf plate are fixed with a fixing cylinder. A rotating cylinder is disposed between the two fixing cylinders. A shaft passes through the rotating cylinder and the two fixing cylinders, and an end cap is fixed to the top of the shaft. Multiple hemispherical grooves are formed on the lower surface of the rotating cylinder, and a ball bearing is disposed inside each groove. The bottom end of the ball bearing is in contact with the upper surface of the bottom fixing cylinder. In this utility model, a first leaf plate, a second leaf plate, two fixing cylinders, a rotating cylinder, a shaft, a ball bearing, an end plate, a sliding sleeve, and a guide plate are provided. The first and second leaf plates are connected to the door frame and the door respectively by bolts. The second leaf plate rotates by the rotating cylinder rotating on the surface of the shaft. During this process, the ball bearing supports the rotating cylinder, thereby reducing wear on the bottom of the rotating cylinder and achieving a better noise reduction effect.

The invention provides a driving device and an air conditioner with the same, the driving device comprises two driving structures which are used for being connected with the two ends of a door plate of the air conditioner respectively, and each driving structure comprises a mounting assembly, a loading sliding block and a transmission assembly; the installation assembly is arranged on the inner side of an air outlet of the air conditioner shell. The loading sliding block extends in the arc-shaped direction and is arranged on the mounting assembly in a reciprocating motion mode in the arc-shaped direction, the end of the door plate is used for being connected with the loading sliding block, a plurality of rolling wheels are rotatably arranged on the side portion of the loading sliding block at intervals, and the peripheral faces of the rolling wheels are used for making contact with the surface of the mounting assembly; the transmission assembly is arranged on the mounting assembly and connected with the load-carrying sliding block so as to drive the load-carrying sliding block to reciprocate in the arc-shaped direction through the transmission assembly to drive the door plate to move. The problems that in the prior art, due to the fact that a traditional roller structure for driving an air conditioner door plate to move is low in flexibility, jamming and abnormal sound are prone to occurring in the running process are solved.

The utility model belongs to the technical field of electric doors, and particularly relates to a single-open electric door which comprises a fixed door body installed on the ground and guide plates which are symmetrically installed on the surface of the fixed door body and are of a U-shaped structure, a movable door body is arranged above the surface of the fixed door body, and the movable door body is limited on the surface of the fixed door body through the guide plates and guide rods. Compared with a traditional door plate supported by guide wheels and guide grooves, noise generated in the moving process of the movable door body can be reduced, the mute effect is good, the control switch is operated, signals are sent to the programmable logic controller, then the movable door body is driven to be opened and closed, hands can be well prevented from being pinched, or the movable door body is well prevented from being impacted, and the service life of the movable door body is prolonged. And when the movable door body extrudes an object, the work of the servo motor is cut off in time after the numerical value of the programmable logic controller is changed, so that the movable door body stops running, an alarm is given to the alarm to remind personnel, the use of a user is facilitated, and the intelligent door is more humanized.

The utility model relates to power motor technical field, especially a wheel hub motor, including fixed main shaft, output motor, transmission assembly, output box and wheel hub rubber, be provided with the accommodation cavity in the output box, the output motor sets up in the accommodation cavity, transmission assembly sets up in the accommodation cavity and is connected with the output end of output motor, be provided with transmission connecting ring in the accommodation cavity, transmission connecting ring is connected with transmission assembly, the output motor is used for driving transmission assembly transmission to drive output box rotation, fixed main shaft sets up at the axle center department of output box, and passes through output motor and transmission assembly in proper order, wheel hub rubber sets up at the outside of output box, the utility model has obvious technical advantage in reliable transmission, high degree of integration, environmental protection, maintenance convenient and production controllability etc.

The invention relates to the technical field of diesel generator cooling, in particular to a circulating cooling type diesel generator set which comprises a bottom plate, a diesel engine installed in the middle of the top face of the bottom plate, a generator body installed at one end of the top face of the bottom plate, a radiator installed at the other end of the top face of the bottom plate, a shell installed at the rear end of the top face of the bottom plate and a turning plate rotationally connected to the shell. The upper end of the radiator is communicated with a water inlet tank, the lower end of the radiator is communicated with a water outlet tank, a liquid storage tank is installed on the top face of the shell, and the lower end of the liquid storage tank is communicated with the water inlet tank. Continuous and efficient circulation of cooling liquid is achieved, it is ensured that heat generated in the working process of a diesel engine can be effectively taken away in time, the heat dissipation efficiency of a radiator is improved, the external temperature of the diesel engine and a generator body during working is reduced, and the diesel engine and the generator body can still work even under the severe working conditions of high temperature, high load and the like. And the efficient heat dissipation effect can be kept, and a powerful guarantee is provided for stable operation of the diesel engine.

The utility model discloses a low-noise dynamometer environment test chamber, which comprises an outer chamber arranged on the ground and an underground chamber arranged under the ground and positioned below the outer chamber, a platform frame, a dynamometer device partially penetrating out of the platform frame and a track laid on the inner bottom wall of the underground chamber are arranged in the underground chamber, a connecting plate in contact with the track is arranged at the bottom of the work testing device, a micropore sound absorption plate is arranged on the inner side wall of the underground cabin, and a sound insulation plate is arranged on the inner top wall of the platform frame. The micropore sound-absorbing plate is arranged on the inner side wall of the underground cabin, the micropore sound-absorbing plate has good sound-absorbing performance and can effectively absorb and reduce environmental noise, meanwhile, the sound-insulating plate is used for blocking the noise from being transmitted into the outer cabin from the underground cabin to a certain extent, the noise in the outer cabin is reduced, in addition, the underground cabin is arranged under the ground, and the noise in the outer cabin is reduced. And by combining with the outer cabin on the ground, not only is the underground space effectively utilized, but also the overall sound insulation performance is enhanced through the natural sound insulation effect of the underground space.