26results about How to "Increase damping force" patented technology

The invention relates to the technical field of external valves of automobile shock absorbers, and discloses a pilot valve which comprises a liquid passing cover, a special-shaped gasket is connected to the lower portion of the liquid passing cover, an oil passing groove is formed in the special-shaped gasket, the oil passing groove is of a cross structure, and the end of the cross groove is the end of the special-shaped gasket. According to the pilot valve, the oil passing groove is additionally formed in the special-shaped gasket and penetrates through the special-shaped gasket, compared with an existing oil passing groove, the area of the oil passing groove is larger, the oil passing speed is higher, liquid flowing is more convenient, the overall end cap is reduced by 1.5 mm, the axial size occupied by an external valve is further reduced, the rigidity of the special-shaped spring piece is improved, and the service life of the pilot valve is prolonged. According to the pilot valve connector, a pilot valve and a connector are combined into a whole, on the premise that the performance is met, the axial size is reduced, a belleville spring and two special adjusting washers are added, and the better damping effect of the shock absorber is obtained.

The invention provides an axial plunger pump with vibration reduction and clearance self-adaptive adjustment functions, which comprises a plunger cylinder body assembly, and the plunger cylinder body assembly is composed of a plunger, a cylinder body, magnetorheological fluid, a permanent magnet plunger barrel and a plunger hole; a cavity is formed between the inner wall and the outer wall of the plunger, the cavity is filled with the magnetorheological fluid, and the magnetorheological fluid can freely flow in the cavity; under the action of external magnetic force, the magnetorheological fluid has a chain structure; the plunger holes are formed in the cylinder body in a circumferential surrounding manner, and the plunger holes are used for accommodating the permanent magnet plunger barrel and the plunger; the permanent magnet plunger barrel is detachably fixed on the cylinder body; the plunger is embedded into the permanent magnet plunger barrel, and the permanent magnet plunger barrel is in clearance fit with the plunger; by arranging the plunger, the permanent magnet plunger barrel and the magnetorheological fluid, the viscosity of the magnetorheological fluid is changed under the action of a magnetic field to increase damping force, meanwhile, the magnetorheological fluid flows to enable the plunger to adjust the gap between the plunger and the cylinder body in a self-adaptive mode, and eccentric wear is avoided.

The utility model discloses a magnetorheological damper capable of effectively improving damping force, and particularly relates to the technical field of magnetorheological dampers, which comprises an outer cylinder, an inner cylinder, an upper end cover, a lower end cover, a damping gap and a piston rod. According to the magneto-rheological damper capable of effectively improving the damping force, the permanent magnet ring is arranged outside the inner cylinder, the magnet exciting coil is arranged outside the permanent magnet ring, and when the magneto-rheological damper works, the permanent magnet ring can effectively enhance a magnetic field generated when current passes through the magnet exciting coil, so that the damping force of magneto-rheological fluid in a working state can be improved, and the damping force of the magneto-rheological fluid is improved. According to the magnetorheological damper, the maximum damping force is larger than that of a traditional magnetorheological damper, the damping force of the damper is large in adjustable amplitude, meanwhile, the maximum value of the damping force is increased, meanwhile, the magnetorheological damper is simple in structure, the outer cylinder and the inner cylinder are detachably connected, later maintenance and replacement of parts and magnetorheological fluid are facilitated, and the magnetorheological damper is suitable for large-scale popularization and application. Repeated utilization is achieved, resources and cost are saved, and assembling of the magnetorheological damper is simplified.

The utility model provides a magnetorheological fluid damper, which belongs to the technical field of dampers, and comprises a shell, magnetorheological fluid, a plurality of magnetic parts, a plurality of elastic elements, a plurality of elastic elements, a plurality of elastic elements and a plurality of elastic elements, the rotating rod is rotationally arranged in the shell, the extending end of the rotating rod is rotationally connected with the shell through a thread structure, and when the rotating rod is subjected to axial force, the rotating rod can rotate on the shell through the thread structure; the detection piece is arranged on the shell, the rotating rod is matched with the detection piece, and when the rotating rod axially moves relative to the shell to abut against the detection piece, the detection piece can generate an optical signal according to the abutting pressure of the rotating rod; according to the utility model, when the rotating rod abuts against the detection piece, the detection piece generates an optical signal, so that the stress condition of the rotating rod at the moment can be calculated according to the abutting pressure recorded by the detection piece, the working state of the damper under the vibration condition is recorded, and whether the damper is in a healthy qualified state or not is judged after vibration.

The present invention relates to the technical field of damping walls, and in particular to a porous viscous damping wall. It comprises: an upper connecting plate; an upper box body, the upper box body is fixedly connected to the bottom of the upper connecting plate, a closed cavity is formed in the upper box body, the cavity is filled with a viscous fluid, a first guide shaft is arranged in the transverse direction of the upper box body, the first guide shaft transversely penetrates the accommodating cavity, and the first guide shaft is sealed and connected to the upper box body, a first steel plate is also arranged in the upper box body, the first steel plate is perpendicular to the first guide shaft, the first guide shaft penetrates the first steel plate, the first steel plate is fixedly connected to the first guide shaft, a plurality of first damping holes are arranged on the first steel plate, a plurality of first damping holes are opened along the axial direction of the first guide shaft, and a plurality of first damping holes penetrate the first steel plate; a lower box body, the lower box body is sleeved on the outside of the upper box body, and the two ends of the first guide shaft are respectively fixedly connected to the two side walls of the lower box body. The porous viscous damping wall of the present invention can provide a greater damping force and improve the stability of the damping wall.

The invention relates to a self-resetting two-way colloid damper and an assembling method thereof, and belongs to the technical field of vibration control, the self-resetting two-way colloid damper comprises a piston connecting rod, a guide cylinder, an upper pressing plate, a cylinder body, a piston rod, an upper piston, a lower piston, a lower pressing plate, a piston rod limiting nut, a tail cylinder, a compression spring and working liquid with a porous lyophobic matrix, and the cylinder body is filled with the working liquid. The guide cylinder and the tail cylinder are respectively arranged at two ends of the cylinder body to form a cylinder body of the damper; an upper pressing plate is arranged on the side, close to the guide cylinder, in the cylinder of the damper, and a lower pressing plate is arranged on the side, close to the tail cylinder, in the cylinder of the damper. An upper piston and a lower piston are oppositely arranged on the inner side of the upper pressing plate and the inner side of the lower pressing plate correspondingly. A working liquid with a porous lyophobic matrix is filled between the upper piston and the lower piston; and the compression spring is sleeved on the piston rod between the upper piston and the lower piston. According to the invention, the problem of vibration control under normal use of constructional engineering and other dynamic systems can be solved, and the design of constructional engineering based on functionality and safety is realized.

The invention discloses a hysteresis flexible sound insulation board and a manufacturing method, which belongs to the field of industrial sound insulation and vibration isolation. A hysteresis flexible sound insulation board manufacturing method comprises the following steps: stirring flexible particles, ferromagnetic particles and glue for 15 to 20 minutes to form a mixture, then moving the mixture into a mold, slowly applying pressure to the mixture for molding, and applying a magnetic field to the mixture while applying pressure, so that the ferromagnetic particles adjust their directions due to the magnetic field, stopping pressurization and applying the magnetic field after the mixture is formed, taking out the formed mixture, applying the magnetic field again after cooling, and applying the magnetic field to the mixture again, wherein the applied magnetic field strength is the same as the magnetic field strength applied during the molding process, and stopping applying the magnetic field after 25 to 35 minutes to form a hysteresis flexible sound insulation board. The hysteresis flexible sound insulation board and the manufacturing method of the invention improve the strength, rigidity and damping effect of the hysteresis flexible sound insulation board, and improve the sound insulation and vibration isolation effects of the hysteresis flexible sound insulation board.

This invention provides a seismic isolation bearing, comprising an upper cover plate and a lower cover plate arranged parallel to each other. An upper connecting plate is fixedly attached to the bottom surface of the upper cover plate, and a lower connecting plate is fixedly attached to the top surface of the lower cover plate. Steel plates and rubber sheets are stacked and spaced apart between the upper and lower connecting plates. The bearing also includes a cylindrical friction damper disposed between the upper and lower cover plates. The cylindrical friction dampers are symmetrically distributed on the outer sides of the steel plates and rubber sheets, with the line connecting the centers of the upper and lower cover plates as the centerline. Both ends of the cylindrical friction damper are connected to the upper and lower cover plates via universal joints. The solution provided by this invention can improve the functionality, reliability, and safety of the seismic isolation structure, and increase vibration reduction efficiency.

The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan which comprises a centrifugal fan body, a transverse plate is fixedly arranged at the bottom of the centrifugal fan body, connecting plates are fixedly connected to the four corners of the lower surface of the transverse plate, a bottom plate is arranged below the transverse plate, and shells are fixedly connected to the four corners of the upper surface of the bottom plate. During working, the connecting block is locked by means of matching of the mounting hole and an external screw, so that the centrifugal fan is fixed, when vibration generated during working of the centrifugal fan main body is transmitted to the connecting plate and the shell, damping force between the viscous body and the connecting plate is utilized to absorb vibration force, and the vibration force is absorbed by matching with the rubber column, so that the vibration force is reduced. According to the low-noise centrifugal fan, the motor noise can be reduced, the contact area between the motor noise and the viscous body is increased through the arrangement of the baffle plates, the damping force can be improved, the noise generated during air outlet can be absorbed through the sound absorption cotton, the noise reduction effect is further improved, the low-noise centrifugal fan is formed, noise pollution is reduced, and convenience is brought to use of the centrifugal fan.

The purpose of the present invention is to provide a series type extruded magnetorheological damper, comprising a working cylinder, a piston rod, a piston body of an electromagnetic piston, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring, and a coil; the left and right end surfaces of the piston body are provided with a plurality of annular grooves spaced in a radial direction. The present invention can solve the existing problems such as small damping force, and at the same time achieves the reduction of the volume of magnetorheological fluid used for work, greatly improves the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

The invention relates to the technical field of aircraft hydraulic systems, in particular to an anti-deflection rotating joint with a hose, which comprises two rotating pairs, the rotating pairs comprise connecting seats and inlets and outlets, the rotating pairs are provided with circulation channels, fluid circulates through the circulation channels and the inlets and outlets, the hose is mounted on the inlets and outlets, and the hose is connected with the connecting seats. The hose assembly is used for communicating the circulation channels of the two revolute pairs, the hose can deform according to deviation of the revolute pairs and keep the circulation channels of the two revolute pairs communicating with each other, the damping sleeve is provided with a hollow cavity, and a traditional metal pipeline is replaced with the hose assembly; axial, radial and angular displacements generated by offset load are absorbed and compensated by utilizing the flexibility characteristic of the hose, meanwhile, progressive limiting is realized by matching with the damping unit, and before the radial offset of the revolute pair is close to the maximum deformation value of the hose, the damping force is increased along with the increase of the offset, so that the influence on the sealing property of the joint of the hose and the revolute pair is avoided; and the effects of uniform stress and smooth rotation of the sealing surface are achieved.

The utility model provides a kind of folding glasses leg, belong to glasses technical field.It solves how to improve the structural stability of glasses leg under the premise of guaranteeing that glasses leg can be folded.The present folding glasses leg includes the connecting section and the folding section of strip shape, the front end of the connecting section and the rear end of the folding section are hinged, the rear end of the connecting section is equipped with positioning member, the positioning member is along the length direction of the connecting section and the sliding connection of the connecting section, the rear end of the connecting section is also equipped with elastic member, the elastic member is elastically acted between the positioning member and the rear end of the connecting section along the length direction of the connecting section, and the positioning member and the front end of the folding section are tightly abutted.The present folding glasses leg can improve the structural stability of glasses leg under the premise of guaranteeing that glasses leg can be folded.

An electromagnetic damping photovoltaic tracking system includes: a tracking bracket and a driving mechanism; the tracking bracket includes a column, a rotating support part, a damping part and an electromagnetic part; the column is fixedly arranged, the rotating support part is rotatably arranged on the column, and the driving mechanism is used to drive the rotating support part to rotate; the damping part is arranged on the rotating support part, and the electromagnetic part is arranged on the column, and the electromagnetic part adsorbs the damping part when it is energized to form a damping structure for hindering the rotation of the rotating support part; the electromagnetic part is intermittently energized. The electromagnetic part is intermittently energized. In this way, when working in windy weather, since the electromagnetic part will cooperate with the damping part to generate resistance to prevent the rotating main shaft from rotating excessively when it is energized, it is difficult for the wind kinetic energy to accumulate during the rotation of the rotating main shaft, so that the tracking bracket will not be damaged due to wind resonance.

The utility model discloses a motorcycle front magnetorheological damper and motorcycle, including working cylinder, guider assembly, piston assembly, floating piston assembly, magnetorheological fluid, outer tube support assembly, ECU control unit and sensor, guider assembly, piston assembly and floating piston assembly are located in the inside of working cylinder, and piston assembly includes built -in solenoid and damping passage, and damping passage penetrates the upper and lower end of piston assembly, and magnetorheological fluid fills the working cavity between guider assembly and floating piston assembly, and, outer tube support assembly is at least partially coated in the outside of working cylinder, and is connected with guider assembly, and ECU control unit and solenoid electric connection are used for the signal adjustment input to solenoid's current according to sensor, like this through solenoid and the combination of magnetorheological fluid, ECU control unit can real -time regulation magnetic field intensity, change the viscosity of magnetorheological fluid to dynamic control damping force.

The utility model discloses a high-strength damper, and relates to the technical field of dampers. The high-strength damper comprises a pipe assembly, a piston assembly, a piston rod, a first spring and a sealing piece, the piston assembly is movably arranged in an inner cavity of the pipe assembly, the first end of the piston rod is inserted into the inner cavity of the pipe assembly in a penetrating mode and connected with the piston assembly, and the first spring is arranged between the piston assembly and the end of the pipe assembly. The sealing piece is tightly sleeved on the piston rod and is in contact connection with an inner cavity of the pipe assembly; damping oil is injected between the inner cavity of the pipe assembly and the sealing piece; the piston assembly comprises a piston body, a piston shaft and a piston ring, the piston body is provided with a first oil passing channel and an oil return channel, the piston shaft is movably arranged in the first oil passing channel, and the piston ring is movably arranged in the oil return channel. According to the high-strength damper, the piston shaft is additionally arranged in the first oil passing channel, the flow of the first oil passing channel is reduced through the piston shaft, the oil passing amount of damping oil is reduced, then the damping force is improved, and high strength is achieved.

The utility model discloses an anti-seismic composite damper based on self-healing-metal buckling-eddy current coupling. The anti-seismic composite damper comprises a connecting rod assembly, a damping wall assembly and a rotating support. The connecting rod assembly comprises a rigid connecting section, a slidable inserting section and a permanent magnet, and the rigid connecting section and the slidable inserting section form buckling guide fit through a preset path; the damping wall assembly is of a multi-layer composite structure and comprises a shell, a cooling layer and a magnetic conductive layer, and an inner cavity of the damping wall assembly wraps the connecting rod assembly to form a magnetic flux loop. The rotating support is provided with a rotating limiting structure, and the two ends of the rotating limiting structure are connected with the connecting rod assembly and an external structure correspondingly. According to the utility model, the elliptical cavity is preset in the plastic base body, and the elliptical cavity is broken to release the self-healing agent when the displacement of the connecting rod exceeds a threshold value; after the self-healing agent flows out, the self-healing agent chemically reacts with the plastic matrix to be cured into a solid, and displacement is hindered through mechanical occlusion; the phase change resistance generated in the curing process achieves self-adaptive adjustment of small-earthquake low resistance and large-earthquake high resistance, and the damping force can be remarkably enhanced during strong earthquakes and aftershocks.

The utility model relates to the technical field of aluminum profile processing, and discloses an automobile seat aluminum profile extrusion device with high compression resistance, which comprises a mounting seat, an upper die and a lower die, the top of the mounting seat is in bolted connection with two shells, inner cavities of the two shells are provided with main hydraulic chambers, a first-stage sub-chamber is nested in the main hydraulic chamber, and a second-stage sub-chamber is nested in the lower die. A second-stage sub-cavity is embedded in an inner cavity of the first-stage sub-cavity, a first throttling hole is formed in one end of the first-stage sub-cavity, second throttling holes are formed in the two ends of the second-stage sub-cavity, a piston is slidably connected to an inner cavity of the main hydraulic cavity, and an ejector rod is fixedly connected to an inner cavity of the piston. According to the utility model, the movement speed of the ejector rod can be controlled by adopting the shell with a multi-stage hydraulic chamber structure and a multi-stage throttling design, and in the lifting process of the ejector rod, hydraulic oil sequentially passes through all stages of sub-chambers with throttling holes with different diameters to gradually consume energy, so that the movement speed of the ejector rod is effectively inhibited and adjusted.

The present invention provides a hydraulic damper, which is provided with an oil chamber, a push rod, a front cylinder oil seal, a piston oil seal and a spring. When the push rod is under pressure, it drives the piston oil seal, and the oil seal ring III seals the oil return channel I under pressure, and the hydraulic oil flows from the rear cylinder to the front cylinder through the center hole channel; when the push rod is not under pressure, the spring pushes the piston oil seal to move, and the oil seal ring III approaches the oil return channel II under pressure. The oil return channel II is deeper than the oil return channel I and will not be blocked by the oil seal ring III. The push pin is close to the center hole channel to block the hydraulic oil, and the hydraulic oil can only flow from the front cylinder to the rear cylinder through the oil return channel I and the oil return channel II on both sides; the damper has the advantages of small size and simple structure. Through the difference in the size of the internal piston oil seal center hole channel, the oil return channel I and the oil return channel II, the damping force is realized. The second-level change from the first-level uniform increase to the second-level explosive reaching the maximum value is realized, and the damper reset is smooth and stable.

This utility model relates to a shock absorber and its vehicle, comprising: a cylindrical body, a piston, and a coil; the cylindrical body is a conductor structure and has a guide cavity; the piston is located within the guide cavity and is telescopically connected to the cylindrical body, and the piston can extend and retract relative to the cylindrical body along the axial direction of the guide cavity; the coil is located within the guide cavity and connected to the piston, and the coil is used to connect to a power source. This shock absorber and its vehicle can enhance the damping force of the shock absorber when the vehicle travels on special road surfaces, thereby ensuring vehicle comfort and handling.

The purpose of the present invention is to provide an embedded shearing magnetorheological damper, comprising a working cylinder, a piston rod, a piston body, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring I, a permanent magnet ring II, a permanent magnet ring III, and a coil. The present invention can solve the existing problems such as small damping force, while reducing the volume of magnetorheological fluid used for work, greatly improving the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

A pre-pressing large-stroke composite shear type wall toe damper comprises a plurality of restraining plates A, restraining plates B and viscoelastic bodies which are arranged in parallel in a staggered mode, and the viscoelastic bodies are fixedly connected with the restraining plates A and the restraining plates B; pre-compression strain is applied to the viscoelastic body through the pre-tightening bolt, pressure stress is generated in the viscoelastic body, and the initial bearing capacity and damping force of the wall toe damper are improved; meanwhile, a lead rod is arranged among the restraining piece A, the restraining plate B and the viscoelastic body in a penetrating mode, and the initial bearing capacity and damping force of the wall toe damper are further improved; the large-stroke composite shear wall toe damper with the pre-pressing function has the advantages of being high in initial bearing capacity, capable of absorbing earthquake energy during small displacement, large in shear deformation range, capable of solving stress concentration at the corner of the shear wall toe and the like, and does not need to be replaced after an earthquake, so that the large-stroke composite shear wall toe damper with the pre-pressing function has extremely high application and popularization value in high-rise and super high-rise buildings.

The invention discloses a magnetorheological intelligent variable stiffness bearing, which relates to the technical field of building seismic isolation, and comprises a lower base plate and an upper base plate, a separator ring is installed between the lower base plate and the upper base plate, a high-damping rubber bearing is installed inside the separator ring, a return ring is fixedly connected inside the separator ring, and the return rings are evenly distributed on the circumference of the high-damping rubber bearing, magnetorheological dampers are arranged on adjacent sides of the outer walls of a plurality of return rings, and an evenly distributed self-adjusting mechanism is installed on the inner wall of the separator ring for adjusting the stiffness of the magnetorheological damper, an auxiliary magnetic mechanism is arranged between the lower base plate and the upper base plate, the auxiliary magnetic mechanism is arranged outside the magnetorheological damper, and steering assemblies are respectively installed at both ends of the magnetorheological damper; the self-adjusting mechanism can be automatically adjusted during an earthquake, thereby extending the service life of the magnetorheological damper, and the adaptation assembly can realize precise control of the magnetorheological damper, thereby greatly improving the control effect of the bearing on structural vibration.

The application provides an X-shaped outrigger truss lever type negative stiffness energy dissipation outrigger system, relates to the technical field of negative stiffness energy dissipation shock absorption in the technical field of building engineering, and comprises a core tube, a frame column, an X-shaped outrigger truss and a double shock absorption component, wherein the double shock absorption component comprises a displacement amplification lever, an upper damper, a lower damper, an upper pre-pressing spring and a lower pre-pressing spring; in an initial state, the axis of the upper pre-pressing spring, the hinge joint of the upper end of the displacement amplification lever and the upper damper, the hinge joint of the lower end of the displacement amplification lever and the lower damper, and the axis of the upper pre-pressing spring are in the same straight line. The application combines the displacement amplification mechanism of a lever type mechanism and the lever type negative stiffness displacement amplification mechanism, has a double displacement amplification effect, the pre-pressing force is entirely applied to a non-load-bearing component, and two groups of pre-pressing springs and dampers can be arranged on one outrigger truss to generate a double damping energy dissipation effect.

The purpose of the present invention is to provide a stepped magnetorheological damper, comprising a working cylinder, a piston rod, a piston body of an electromagnetic piston, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring, and a coil, wherein the piston body is in the shape of a stepped shaft. The present invention can solve the existing problems such as small damping force, while reducing the volume of magnetorheological fluid used for work, greatly improving the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

The purpose of the present invention is to provide an embedded extruded magnetorheological damper, comprising a working cylinder, a piston rod, a piston body, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring I, and a permanent magnet ring II; an annular convex portion is respectively provided on the left and right end faces of the piston body. The present invention can solve the problems of the existing small damping force, and at the same time, reduce the volume of the magnetorheological fluid used for working, greatly improve the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.