73results about How to "Improve vibration absorption capacity" patented technology

The invention relates to a multi-shaft linkage numerically-controlled machine tool, in particular to a turning, drilling and milling combined machine tool for machining a flange. The turning, drilling and milling combined machine tool for machining the flange comprises a lathe bed, a workbench and a workbench base, wherein the workbench and the workbench base are arranged on the lathe bed. Stand columns and a cross beam are arranged on the workbench. A double-stand-column symmetrical structure is arranged on the workbench. The cross beam is a fixed beam. Guide rails are arranged on the two sides of the lathe bed. The stand columns are arranged on the guide rails to support a machine tool head. A C-shaped shaft box, a tool rest, a servo feeding system, a workbench clamping system, a hydraulic system and a button station are further arranged on the lathe bed. The lathe bed is provided with the vertical tool rest. The tool rest is of a double-ram structure, a turning ram tool rest body is arranged on the right side, and a milling ram tool rest body is arranged on the left side. The basic part of the machine tool is of an integrally cast structure, and thus the machine tool has the characteristics of being high in strength, rigidity, vibration resistance and vibration absorption. The turning, drilling and milling combined machine tool also has the advantages that the number of control shafts is large, the functions are complete, the reliability is high, and the stability performance is good.

The invention relates to a passive fluidic resistor suspension with an equivalent mechanical structure, and belongs to the technical field of engine supporting structures. The passive fluidic resistor suspension with the equivalent mechanical structure mainly comprises an external rubber mainspring, an upper connecting bolt connected with the external rubber mainspring, an external supporting spring, an upper fluid chamber, a lower fluid chamber, an inner gas chamber, an inner spring, a mass block and the like, wherein the inner spring and the mass block are arranged in the inner gas chamber. The upper fluid chamber which tightly abuts against the upper end face of a partition board between the upper fluid chamber and the lower fluid chamber, an external gas chamber and the inner gas chamber are arranged in sequence from outside to inside. The lower fluid chamber tightly abuts against the lower end face of the partition board between the upper fluid chamber and the lower fluid chamber. An inertia channel which enables the upper fluid chamber to be communicated with the lower fluid chamber is arranged in the partition board between the upper fluid chamber and the lower fluid chamber. According to the passive fluidic resistor suspension with the equivalent mechanical structure, the notch frequency of the fluidic resistor suspension is constant within a low frequency range, but the dynamic stiffness of the fluidic resistor suspension is reduced as far as possible within a notch frequency range; in addition, the dynamic stiffness of a corresponding peak frequency is reduced as far as possible, the noise lowering effect and the damping effect of the engine fluidic resistor suspension are improved within the low frequency range, and the fatigue performance and the creep property of the fluidic resistor suspension can also be improved.

An air conditioner having a cooling capacity of about 11 kW to about 16 kW, a mixed refrigerant in which R32 is contained at a content of about 50% or more is used as the refrigerant, and the refrigerant pipe is made of a ductile stainless steel material having a delta ferrite matrix structure of about 1% or less on the basis of a grain area.

The invention discloses a manual-shift speed reducer of a crowned-gear clutch for large-size petroleum drilling machines, which comprises a case, an input shaft system, an output shaft system, a shift operating mechanism, a lubricating system, a ventilator system and a measuring rod system. A lower case, a middle case and an upper case are assembled from bottom to top vertically to form the case, the input shaft system, the output shaft system, the shift operating mechanism, the lubricating system, the ventilator system and the measuring rod system are arranged in the case, the input shaft system is used for inputting power and realizing high revolution speed, the output shaft system is used for outputting torque and realizing low revolution speed, and the shift operating mechanism is used for changing the transmission ratio of the input shaft system to the output shaft system. The manual-shift speed reducer of the crowned-gear clutch for the large-size petroleum drilling machines has wide applicable range of environmental temperature, is capable of running on open sites full time, is wide in applicable range of environmental temperature and has the advantages of high bearing capacity, long service life, large output torque, high transmission efficiency, low operation noise and vibration of the case, fine tightness, high exchangeability, convenience in installation, flexibility and stability in shift.

The invention provides a high-speed train wheel vibration absorbing device based on photonic crystals. The device comprises an upper cover plate, a lower cover plate, a 'dot defect' localized photoniccrystal vibration absorbing assembly, and a Bragger-type photonic crystal vibration absorbing assembly which is arranged in the space formed by the upper cover plate, the lower cover plate and the 'dot defect' localized photonic crystal vibration absorbing assembly. The device has the advantages of being simple in overall structure and convenient to produce, the device has better vibration absorbing and noise reduction effects on high-speed train wheels within medium high frequency domains, the requirements on working environments are lower, and the device can be used for reducing the noise of the high-speed train wheels, improving the noise and vibration characteristics of the high-speed train wheels, improving the working environment of workers and the like.

The embodiment of the invention discloses a vibration reducing device for a helicopter rotor blade, and relates to the technical field of helicopters. The vibration reducing device for the helicopter rotor blade comprises blade girders (1), a shock absorption device (2), bolts (3) and nuts (4), and is characterized in that the shock absorption device (2) is fixed inside the blade girders (1) through the bolts (3) and the nuts (4). The tuned mass of the shock absorption device plays a role in amplifying movement of a main mass block, the shock absorption device is installed at the blade tip position and can generate the highest torque to the root of the blade, the shock absorption effect is enhanced, and accordingly the waving vibration level of the blade can be effectively reduced.

[Solution] A centrifugal-pendulum-type vibration absorption device (10) constitutes a motion-starting device (1) together with a damper mechanism (8) that includes: a plurality of rotating elements including a drive member (81) connected to an engine via a lock-up clutch (9) and a driven member (83) connected to a transmission; and a first and second coil spring (SP1, SP2) that transmit torque between the drive member (81) and the driven member (83). The centrifugal pendulum-type vibration absorption device includes a support member (11) that rotates as a single unit with the driven member (83) of the damper mechanism (8) and a mass body (12) that is supported by the support member (11) so as to be able to oscillate freely, and is designed so as to have an effective degree greater than the degree of vibration which is generated by the engine and which is to be damped, by a correction quantity related to the hysteresis of the damper mechanism (8).

The invention relates to a fully active dynamic vibration absorber with variable stiffness applied to vibration reduction and noise control of machinery and electrical equipment. It solves the shortcomings of too narrow control bandwidth of the passive control vibration absorber, too much control energy required by the active control vibration absorber and insufficient vibration absorption effect of the semi-active control vibration absorber. The structural features are: the executive part includes a base frame, a pair of bases are arranged on the top surface of the base frame, and a ring-shaped guide rod is arranged on the base. The guide rod is connected with the moving mass block, and the lower part of the moving mass block is provided with a power mechanism. The invention has good vibration absorption effect, wide vibration reduction frequency, less energy consumption, and less input energy than the active control vibration absorber, so the stability is better than the active control vibration absorber; the structure is simple, the control method is easy, and the system reliability is high.

A novel subway vibration reduction track structure and a vibration absorber device are disclosed. The novel subway vibration reduction track structure comprises a pouring type shield tunnel foundation, a track plate is arranged above the shield tunnel foundation, two steel rails which are oppositely arranged are arranged on the track plate, a plurality of rectangular openings used for vibration reduction installation are formed in the inner bottom of the shield tunnel foundation, and foundation seats are arranged in the rectangular openings. The foundation seats are connected with an upper disc through a main vibration reduction assembly, and the upper disc is connected with the bottom of the track plate through a locking piece. The prefabricated track plate is placed on the foundation, the main vibration reduction equipment is installed in the gap between the foundation and the track plate through the multiple assembling openings formed in the track plate, and by adjusting a nut ring, vibration absorption springs in the main vibration reduction equipment and the magnetic layers which are arranged in the main vibration reduction equipment and repel each other in magnetism achieve the effect of effectively counteracting the vibration force of the track plate and the foundation generated during vibration; the effective installation of the vibration absorber can be ensured while the installation of the track plate is not influenced.

The invention discloses a vibration absorber for a steering wheel and a vehicle with the vibration absorber. The vibration absorber comprises a mounting plate and a vibration attenuation component, a first plate and a second plate are arranged at the front end and the rear end of the mounting plate respectively, the vibration attenuation component is connected between the first plate and the second plate and comprises a vibration attenuation part, an elastic part and an adjusting part, the front end of the elastic part is fixed with the adjusting part, the rear end of the elastic part is fixed with the front side of the vibration attenuation part, the rear side of the vibration attenuation part is fixed with the second plate, and the adjusting part is arranged on the first plate and capable of moving back and forth thereon. The vibration absorber can well absorb vibration energy of the steering wheel, vibration energy can be converted into other types of energy such as heat energy which can be dissipated, and accordingly, energy and vibration can be absorbed. According to vibration frequency of different steering wheels and frequency fluctuation of the steering wheels due to the using loss of the vehicle, frequency can be adjusted to match with the vibration absorber, so that the vibration absorber can be applicable to different steering wheels.

The invention discloses an automobile power assembly suspension device, which comprises two assembly suspensions, and the two assembly suspensions are symmetrically installed on the engine. Device, core and bottom plate, the elastic main spring and the core are fixed by vulcanization, a cavity is formed between the elastic main spring and the bottom plate, the buffer device is installed inside the core, and the outside of the bottom plate A fixed plate is installed, the fixed plate is connected to the frame by welding, the core is installed in the limit cover, and the powertrain suspension can effectively reduce vibration and noise under various working conditions, especially Especially in idling conditions and general acceleration and cruising conditions, the vibration and noise reduction effect is good, especially the use of a new type of elastic main spring can better reduce vibration and noise, and the service life is greatly improved, making the driving environment comfortable for drivers and passengers The degree is more perfect, and the service life of vehicle components is greatly improved.

The invention relates to the related technical field of the automobile field, in particular to an automobile roof plate with excellent flame retardant and heat insulation effect in the automobile field, comprising a reinforcing beam, a top cover, a ceiling plate and an interior layer, and a plurality of reinforcing beams are arranged at equal intervals, And the two ends of the reinforcement beams are respectively fixed on the side frames on both sides of the car through the fixed structure, the two ends of the roof panel are installed on the two adjacent reinforcement beams, the top cover is arranged on the upper surface of the roof panel, and the interior decoration layer. It is arranged on the lower surface of the roof panel; by arranging the vehicle roof panel composed of the reinforcement beam, the top cover, the roof panel and the interior layer, and by arranging the reinforcement beam to be composed of the main beam plate and the reinforcement rib, and the main The beam plate and reinforcing bar are arranged in an inverted T-shaped structure, thereby effectively improving the overall strength of the car roof, and the meshing installation between the roof plate and the reinforcing beam can improve its overall stability and ensure its connection. of aesthetics.

The invention provides a torsional vibration damper and a gasoline engine with a variable compression ratio, and the torsional vibration damper comprises hubs which are symmetrically arranged around a central axis; the inertia rings are symmetrically arranged on the outer side of the hub around the central axis; the first damping rubber is arranged between the hub and the inertia ring; one end of the inertia ring is coated with the support, and a cavity is formed by the support and the hub; and the second damping rubber is filled in the cavity.

An ultraprecise electrohydraulic servocontrol static-pressure linear slide way which comprises a lathe bed and a slide carriage used for placing the workpiece. The bottom surface of the slide carriageis fixedly installed with a slider which is internally formed with a groove with a downwards opening. The lathe bed is fixedly provided with a slide way which can be inserted into the groove of the slider correspondingly with the groove of the slider. The inner peripheral wall of the groove of the slider is provided with a plurality of pressure oil chambers which has lubricating and bearing function after combined with the slide way. The plurality of pressure oil chambers are communicated with an oil supplying system through the oil way. The two sides of each pressure oil chamber are respectively provided with an oil return groove which is communicated with an oil return box. Each oil way for supplying oil to the pressure oil chamber is provided with a throttling valve. The inner peripheral wall of the groove of the slider is provided with four pressure oil chambers which are communicated with the oil supplying system through the throttling valves installed on the oil way. The ultraprecise electrohydraulic servocontrol static-pressure linear slide way of the invention can obtain extensive application at the state that the electrohydraulic servo-control is not adopted. The few application of ultrahigh precision requirement can be realized through using the electrohydraulic servo control.

The invention relates to the technical field of manufacturing of hydraulic machine stand columns, in particular to a novel hydraulic machine stand column structure. The novel hydraulic machine stand column structure comprises an upper face panel, a lower face panel, a stand column body defined by wall panels and a sliding block guide rail supporting plate. The upper face panel and the lower face panel are fixedly connected to the upper end and the lower end of the stand column body correspondingly. The sliding block guide rail supporting plate is fixedly connected to the side face of the stand column body. A rib plate structure is fixed into the stand column body. The rib plate structure is formed by symmetrically lapping four rib plates in a staggered mode. Five square cavities are formed by the four rib plates. Locating holes, a pull rod hole and a wire hole are formed in the cavities. The stand column body, the upper face panel, the lower face panel, the sliding block guide rail supporting plate and the rib plate structure are fixedly connected in a welded mode. The novel hydraulic machine stand column structure is simple in structure, convenient to operate and stable and reliable in operation. By arranging the rib plate structure in a hydraulic machine stand column, the equivalent stiffness of the stand column and the vibration absorption capacity of the stand column are improved. Consequently, vibration of a machine body can be effectively reduced and absorbed during transient load missing.

The invention relates to a polyurethane mixed component applied to a slow-rebound damping pad and a preparation method of the polyurethane mixed component and belongs to the technical field of polyurethane application. The polyurethane mixed component applied to the slow-rebound damping pad is composed of a component A and a component B, and the weight ratio of the component A to the component B is 100 (50-60); the component A is composed of polyether polyol A, polypolyols, a cross-linking agent, a chain extender, a foam stabilizer, a catalyst and a foaming agent; the component B is composed of polyether polyol B and isocyanate. The pad made of the polyurethane mixed component is good in rebound effect, and the shock absorption capacity and the hand feeling are improved; the invention further provides a preparation method which is simple, easy to conduct and capable of saving energy and protecting the environment.

The invention discloses a self-adaptive multi-inertia-channel type hydraulic mount and a self-adaption method thereof. A vibration isolation mechanism is arranged in a cavity of the hydraulic mount and comprises an isolation plate, a moving frame and a telescopic structure. The cavity is divided by the isolation plate into an upper liquid chamber and a lower liquid chamber. At least one first blind hole is formed in the side, facing the upper liquid chamber, of the isolation plate, and at least one second blind hole corresponding to the at least one first blind hole is formed in the side, facing the lower liquid chamber, of the isolation plate. At least one mounting groove communicating with the upper liquid chamber and the lower liquid chamber is formed in the isolation plate. A runner communicating with the first blind holes and the corresponding second blind holes is formed in the isolation plate. A decoupling film is fixed in each mounting groove, and the decoupling films disconnect the way that the mounting grooves communicate with the upper liquid chamber and the lower liquid chamber. According to the hydraulic mount, through up-and-down movement of the moving frame, the cross sectional area of inertia channels is adjusted, the aim of adjusting output damping force and rigidity is achieved, the hydraulic mount can meet different requirements under different work conditions, and meanwhile the vibration isolation effect is improved.