5849results about "Springs" patented technology

A hydraulic damper comprises a main tube, a piston assembly, a base valve assembly, and a compression stop assembly. The compression stop assembly includes an insert defining an inner chamber, and a sleeve displaceable along with the main piston assembly and configured to be slidably introduced inside the inner chamber. The sleeve has a diameter lower than the diameter of the main tube defining a first external flow channel between the sleeve and the main tube; the sleeve is attached to the piston assembly by a spring disposed within the sleeve; and the insert is provided with a plurality of axially-spaced holes and has an annular flange adjoining the inner wall of the main tube and separating the compression chamber from a second external flow channel between the radially external outlets of the holes and the base valve assembly.

The present invention relates to a flywheel (1) for a drive train of a motor vehicle, comprising a main flywheel mass (4) forming an input side (2) which can be screwed to a crankshaft of an internal combustion engine through a plurality of screw holes (5) distributed in the circumferential direction (U) of the flywheel (1), a slip clutch (6) arranged downstream of the main flywheel mass (4) in a torque transmission path emanating from the input side (2), and a torsional vibration damper (7) arranged downstream of the slip clutch (6) in the torque transmission path and which has both an output flange (11) and a hub (8) forming an output side (3), which is connected in a rotationally fixed manner to the output flange (11), with through holes (10) distributed in the circumferential direction (U), wherein the torsional vibration damper (7) has a disassembly device (12) which can be removed by rotation and which is designedto remove the non-rotatable connection of the hub (8) to the output flange (11) so that the through holes (10) can be aligned with the screw holes (5).

The invention discloses a semi-submersible wave energy-wind energy integrated power generation platform and a damping regulation and control method of a damping regulation and control system of the semi-submersible wave energy-wind energy integrated power generation platform. The platform comprises a semi-submersible wind driven generator platform, a wind driven generator set, a wave energy power generation device, an energy storage system, a sea area detection system and the damping regulation and control system. The wave energy power generation devices are divided into two groups on the inner side and the outer side of the platform, each wave energy power generation device comprises a platform inner side wave energy power generation device and a platform outer side wave energy power generation device, and each wave energy power generation device comprises a swing arm floater, a universal hinge, a connecting arm and a damping adjusting module. The semi-submersible wind power generation device and the wave power generation device are combined, and offshore renewable resources are comprehensively utilized; the six-buoy design is adopted, buoyancy is dispersed, stability and safety are improved, and meanwhile space is provided for a wave power generation device; the floaters are symmetrically arranged in a hexagonal shape and carry a damping regulation and control system, and the whole structure is more easily stabilized by adjusting the damping of the floaters in all directions.

The invention relates to the technical field of vibration control, and discloses a quasi-zero stiffness vibration isolator imitating an insect jumping foot structure, which comprises a base and a bearing table between which a vertical spring is arranged, the two sets of connecting rod mechanisms are arranged between the base and the bearing table, each set of connecting rod mechanism comprises two lower connecting rods, two upper connecting rods and two middle connecting rods, the two lower connecting rods are hinged to the top face of the base, the two upper connecting rods are hinged to the bottom face of the bearing table, and the two middle connecting rods are distributed in an X shape; two ends of the two middle connecting rods are respectively hinged with the lower connecting rod and the upper connecting rod; the transverse springs are arranged at the hinged positions of the two lower connecting rods and the two middle connecting rods and the hinged positions of the two upper connecting rods and the two middle connecting rods correspondingly. The vibration isolator is simple in structure, small in transverse size, convenient to assemble and disassemble and easy to adjust, quasi-zero-stiffness vibration isolation is achieved through the special mechanical property of the overall structure, vibration energy can be efficiently absorbed, and the vibration isolator has wide application prospects in the field of low-frequency vibration control.

The invention relates to the technical field of excavator bucket rods, and provides a bucket rod composite damping device and an excavator. The device comprises a shell composed of a base, an outer shell and a stress shell; the magneto-rheological buffer device is installed in the shell and composed of a lattice structure made of magneto-rheological elastomer materials and magneto-rheological fluid filled in gaps corresponding to the lattice structure, and a plurality of sound absorption holes are formed in each cell element wall in the lattice structure; the electromagnetic device is located in a containing cavity formed in the lattice structure and is composed of a magnetic core and an electromagnetic coil; the anti-vibration pad and the stress plate are embedded in the top of the shell and are in contact with the stress plate; the damping springs are arranged on the periphery of the shell and fixedly connected between the stress plate and the base; the vibration monitoring module is used for collecting vibration data of the bucket rod in real time and transmitting the vibration data to the intelligent control module, and the intelligent control module is used for adjusting the output magnetic field intensity of the electromagnetic coil according to the vibration data so as to adjust the viscosity of the magnetorheological fluid in real time.

The invention relates to the technical field of damping and shock absorption, in particular to a damping-adjustable composite shock absorption system for textile printing and dyeing equipment, which comprises a bottom plate and a top plate, a first shock absorption unit and a movable plate are mounted between the bottom plate and the top plate, and a first buffer spring is fixedly connected between the top plate and the movable plate; a second damping unit is installed between the movable plate and the bottom plate. During damping, vibration is buffered through telescopic deformation of a first buffer spring and a second buffer spring, oil liquid is pushed to flow in backflow oil pipes through vertical movement of a first piston rod, vibration energy is consumed through friction force between the oil liquid and the backflow oil pipes, and vibration of a machine body is restrained; the different backflow oil pipes are switched to be communicated with the oil storage cavity through the switching mechanism, the longer the backflow oil pipes are, the larger the on-way resistance when oil passes through the backflow oil pipes is, the higher the damping force is, and the damping device can be conveniently installed on textile printing and dyeing equipment with different vibration intensities for damping.

Active suspension actuator systems including an actuator with a compression volume and an extension volume are described. In some embodiments, the system includes one or more flow control devices in fluid communication with the compression volume and / or the extension volume of the actuator. In some instances, a flow control device may include a pressure balanced blow-off valve (PBOV). In some embodiments, the system includes a high capacity bidirectional base valve. In some embodiments, two or more flow control devices cooperate to, for example, damp low amplitude oscillations in the extension and / or compression volumes, and to allow the build-up of pump generated differential pressures while discharging rapid road induced differential pressure spikes between the extension and compression volumes.

An IFP is disclosed. The IFP includes a sealing channel formed axially about an outer diameter (OD), the sealing channel including at least two walls where the at least two walls of the sealing channel having a smaller OD than an inner diameter (ID) of a chamber and a channel is formed between the at least two walls. The IFP also includes an anti-tipping feature fixedly coupled with at least a portion of one wall of the sealing channel, the anti-tipping feature increasing a length of the IFP.

The present disclosure relates to a hydraulic damper comprising a main tube, a piston assembly, a base valve assembly, and at least one hydraulic compression stop assembly cooperating with a compression valve assembly, and comprising a pin disposed slidably within the piston rod and biased to project an activating tip towards the compression chamber. Said compression valve assembly comprises at least one deflectable or floating disc covering compression flow passages, and biased by a piston member slidable along said axis and normally abutting a retaining surface, and a pressure chamber having one surface defined by a surface of said piston member abutting said retaining surface, wherein said pin upon sliding inside the piston rod facilitates a flow of the working liquid from the compression chamber into said pressure chamber to increase biasing load on said at least one deflectable or floating disc.

A diagnostic method localizes technical faults in a motion system that includes a base adapted to receive a motion stage for equipment, a machine frame resting on the floor, dampers adapted to support the base, and an active isolation system arranged between the base and the machine frame. The active isolation system and the base form a mechanical system. The active isolation system includes actuators, adapted to impart six degree-of-freedom (DOF) motion to the base in a reference frame, and inertial sensors adapted to provide a six DOF measurement of the base's motion. The method includes: i) applying a control signal for actuating or contributing to the actuation of the actuators of the active isolation system to impart a motion to the base; ii) obtaining, with the inertial sensors, a six DOF measurement of the base's motion relative to a reference point; iii) creating a measured process sensitivity matrix of the mechanical system using the six DOF measurement; and iv) determining, based on the measured process sensitivity matrix, whether all the actuators and sensors of the active isolation system are working as expected and / or whether there is a pivot point impeding the movement of the base.

The invention relates to the field of electromagnetic valves, in particular to a valve body unit, an electromagnetic valve with the valve body unit and an electric control hydraulic shock absorber with the valve body unit. The hydraulic unit comprises a main valve assembly; the valve plate unit is arranged on the main valve assembly; the main valve assembly comprises a main valve shell. An oil channel is arranged on the main valve shell; the valve plate unit comprises a control valve plate; the control valve plate is arranged at the end part of the main valve shell; the control valve plate can deform; after the control valve plate is deformed, a communication channel is formed at the joint of the control valve plate and the main valve shell; through the arrangement of the control valve plate, after the current of the coil unit is cut off, overflow and discharge of hydraulic oil can be achieved through deformation of the control valve plate.

The invention belongs to the technical field of automobile shock absorbers, and particularly relates to a shock absorber assembly structure for an active hydraulic suspension. Liquid in the rod cavity and the energy accumulator can be pumped into the rodless cavity by regulating and controlling the two-way pump to achieve active jacking of the hydraulic shock absorber, liquid in the rodless cavity is pumped into the energy accumulator and the rod cavity to enable the shock absorber to be actively compressed, and then the lifting end of the shock absorber drives a vehicle body to synchronously move to achieve active adjustment of the height of the vehicle body. In addition, a first channel, a second channel, a third channel, a fourth channel, a first electromagnetic one-way damping valve, a second one-way damping valve, a third electromagnetic one-way damping valve and a fourth one-way damping valve are arranged on the base, and the first electromagnetic one-way damping valve, the second one-way damping valve, the third electromagnetic one-way damping valve and the fourth one-way damping valve are used for controlling the oil flow direction and damping force. An oil flow channel and a flow direction of a traditional shock absorber are changed, a plurality of valve bodies are integrally assembled, and assembly of the valve bodies and the shock absorber is facilitated.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention discloses a laser level meter supporting structure, and belongs to the technical field of laser level meters, the laser level meter supporting structure comprises a supporting seat, the top of the supporting seat is provided with a plurality of fixing clamps, the outer side of the supporting seat is hinged with a plurality of supporting frames, and the outer edge of the top of the supporting seat is fixedly provided with an annular folding air bag; an inflation inlet is formed in the bottom of the annular folding air bag; the sealing plate is connected into the supporting seat in a sliding and sealing mode, a plurality of compression springs are fixedly connected to the bottom of the sealing plate, and the bottom ends of the compression springs are fixedly connected to the inner wall of the bottom of the supporting seat; and the triggering mechanism comprises a shot, a rotating disc, four push plates and four clamping bases, and an iron block is fixedly installed at the top of the shot. Through the arranged triggering mechanism, the supporting frame can be controlled to be opened outwards to improve the supporting stability when the laser gradienter vibrates or inclines greatly, the air bag is inflated, the laser gradienter is protected, and the use safety is improved.

The invention discloses a disc type negative stiffness damper which comprises a base plate, a sliding block is fixedly installed on the base plate, and a rack-shaped sliding rail is horizontally installed on the sliding block in a sliding mode. A large gear and a small gear are rotationally installed on the base plate through a supporting structure, one position of the large gear is externally meshed with the small gear, the other position of the large gear is externally meshed with a rack on the sliding rail, the center of the small gear is fixedly connected with a small gear shaft, and a damper is further fixedly connected to the small gear shaft. A first connecting piece is arranged on the edge of the large gear, a second connecting piece is arranged on the base plate, the first connecting piece is connected with one end of a pretension spring, the other end of the pretension spring is connected with the second connecting piece, and the first connecting piece, the second connecting piece and the pretension spring form a negative stiffness mechanism. The negative stiffness effect is generated by the pre-tensioning spring, and compared with a pre-pressing spring, the pre-tensioning spring cannot be bent; and meanwhile, compared with the magnetic negative stiffness, the magnetic negative stiffness has a larger stroke.

The invention relates to the technical field of intelligent control, and discloses a magneto-rheological damper regulation and control method and system based on machine learning, and the method comprises the following steps: S1, collecting the multi-dimensional state parameters of a system where a magneto-rheological damper is located in real time, the multi-dimensional state parameters comprising a vibration excitation parameter, a damper output parameter and an environment influence parameter; s2, a magneto-rheological damper dynamic characteristic mapping model based on deep learning is constructed, the mapping model takes multi-dimensional state parameters collected historically and corresponding control currents as training samples, and key characteristic weights are strengthened through an attention mechanism; and S3, based on the currently collected multi-dimensional state parameters. The time-varying hysteretic characteristics of the magnetorheological fluid are accurately modeled through an improved LSTM network fused with an attention mechanism, and a collaborative decision-making mechanism of reinforcement learning and model prediction control is combined, so that the problems of nonlinearity and time-varying characteristics which are difficult to deal with by a traditional control method are effectively solved.

The invention belongs to the technical field of shock absorption, and discloses a shock absorber. According to the shock absorber, the temperature change of a shock absorber medium is monitored in real time through the detection piece, and the distance between the one-way valve element and the fastening plug is automatically adjusted through the driving assembly, so that the damping force of the shock absorber can be adaptively adjusted along with the temperature change of the medium. When the viscosity is reduced due to the rising of the medium temperature, the gap between the one-way valve element and the fastening plug is automatically reduced, and the damping force is increased to maintain the vibration reduction performance; when the viscosity is increased due to reduction of the medium temperature, the gap between the one-way valve element and the fastening plug is automatically enlarged, and the situation that damping force is too large, and vibration reduction comfort is affected is avoided. According to the automatic adjusting mechanism, the problem of damping force fluctuation caused by temperature change of a traditional shock absorber is effectively solved, and the stable shock absorption effect of a vehicle can be kept at different environment temperatures.

A bicycle component for an at least partially muscle-powered bicycle, including a seat post device adjustable between two positions, with two support members telescopically movable relative to one another in the axial direction namely, a first support member and a second support member. The bicycle component includes an anti-twist protection with a clamping element that non-rotatably couples the support members together, and which is displaceably received in a guiding groove, so that rotational movement of the first support member relative to the second support member can be at least partially blocked. The anti-twist protection includes a spline device with a spline unit that can be pressed against the clamping element in the axial direction. By pressing the clamping element and the spline unit together, the clamping element and / or the spline unit can be moved relative to the guiding groove in the peripheral direction.

To provide a hydraulic vibration isolator having a poppet valve, which comprises a safety function for preventing damage due to overload, and can be easily replaced with an existing product without increasing the size of the existing product.SOLUTION: A poppet valve device 9 comprises a valve case 11, a valve body 13 that opens and closes a valve seat 11a opening into the valve case 11, and a spring 14 that biases the valve body 13 in an opening direction. The valve case 11 comprises: a flange part 11b that is housed in an outer case 10 communicating with an oil passage 8, slidably penetrates a relief valve seat 10a that opens into the outer case 10 to branch off and merge with the oil passage 8, and abuts against the opening peripheral edge of the relief valve seat 10a; and a relief oil passage 11c formed between a side part and an inner wall of the outer case 10 by cutting out a side part. The valve case 11 is biased by a spring 12 in a direction of closing the relief valve seat 10a. In the poppet valve device 9, excessive oil pressure causes the flange part 11b of the valve case 11 to separate from a valve seat 10a of the outer case 10, and the oil pressure is released through the relief oil passage 11c.SELECTED DRAWING: Figure 5

Air springs for bicycle components are described herein. An example air spring includes a tube, a first sealhead coupled to the tube, a second sealhead coupled to the tube such that a sealed pressure chamber is formed in the tube between the first and second sealheads, and a seal coupled to the second sealhead. The second sealhead and the tube are coupled along an axial interface locking length. The tube has a vent port. The seal is spaced from the vent port by a port seal gap that is less than the axial interface locking length such that as the second sealhead is being decoupled from the tube, the seal loses sealing contact with the inner surface to enable at least a portion of the sealed pressure chamber to be equalized with atmospheric air before the second sealhead is fully decoupled from the tube.

A length-adjustable shock absorber includes a tubular body and an adjusting cylinder. The tubular body has one end formed with threads to form a threaded section. The threaded section is interrupted in an axial direction by at least one recessed groove. The adjusting cylinder is threadedly connected to the threaded section and has at least one through hole. The through hole is rotated along with the adjusting cylinder to face the recessed groove. A locking lever is pivotally connected outside the through hole. The locking lever is pivotable between a locking position and an unlocking position. When the locking lever is pivoted to the locking position, it is engaged in the recessed groove to lock the adjusting cylinder. When the locking lever is pivoted to the unlocking position, it is disengaged from the recessed groove to unlock the adjusting cylinder.

The invention provides an innovative design of a corrugated pipe damper integrated on a sliding main bearing aiming at the problems of transmission system abrasion and fatigue damage caused by vibration energy accumulation of the wind power main bearing under a complex wind load, and belongs to the technical field of wind power generation equipment. A traditional main bearing damping structure is low in energy absorption efficiency, insufficient in dynamic response and difficult to effectively suppress vibration. Through collaborative design of a corrugated pipe multi-stage laminated structure and a fluid energy dissipation channel, a composite mechanism for dynamically dissipating vibration energy is formed. The core of the damping device is composed of a corrugated pipe assembly, damping cavities and a main shaft adaptive structure, impact energy is absorbed through axial flexible deformation of the corrugated pipe, vibration attenuation is achieved in combination with reciprocating flowing of damping fluid in the multiple cavities, and low-frequency swing and high-frequency harmonic waves of a main bearing are synchronously restrained. According to the design, the bearing capacity is guaranteed, vibration transmission is remarkably reduced, the service life of the main bearing is effectively prolonged, the operation reliability of a unit is improved, and the damping requirement of a core transmission system of a high-power wind turbine generator is met.

The invention discloses a transformer self-adaptive vibration reduction system based on a magnetorheological damper and a multi-mode cooperative control method, which are used for solving the problems of insufficient low-frequency vibration suppression and poor environmental tolerance in the prior art. The vibration reduction system comprises a sensor module, a control unit, an execution mechanism and an energy recovery module. The sensor module monitors vibration signals of a transformer iron core and a winding in real time; the control unit converts the vibration signal into a magnetic field intensity adjusting instruction in real time, and the damping force accurately matches the target demand by actively compensating disturbance and dynamically optimizing parameters; the execution mechanism comprises a dual-channel magnetorheological damper, the energy recovery module comprises a friction nanometer generator TENG and a super capacitor, the output voltage of the TENG is stored in the super capacitor after DC-DC conversion, and energy closed-loop utilization is achieved. The problems that a traditional vibration reduction device is insufficient in low-frequency suppression, prone to corrosion and high in energy consumption are solved through multi-frequency-band vibration suppression, environment self-adaption design and the self-power-supply technology.

The invention relates to the technical field of shock absorbers, and particularly discloses a novel frequency sensitive shock absorber piston valve which comprises a connecting rod arranged on the inner side of a shock absorber shell, a first flow guide hole and a second flow guide hole are formed in the lower end of the connecting rod, and the first flow guide hole and the second flow guide hole communicate with an oil channel formed in the inner side of the connecting rod, so that a bypass channel is formed; the piston valve is arranged between the first flow guide hole and the second flow guide hole, the frequency sensitive valve sleeves the outer side of the connecting rod, one side of the piston valve is in lap joint with one side of the frequency sensitive valve, and the frequency sensitive valve is communicated with the second flow guide hole. On the basis of a traditional shock absorber valve assembly, a set of frequency sensitive valve system is additionally arranged, the frequency sensitive valve system can conduct mechanical automatic adjustment on the damping force of the shock absorber along with changes of the vibration frequency or stroke of a whole vehicle at the low-frequency stage and the high-frequency stage, and therefore the requirement for actual use of the whole vehicle is met; the driving comfort and controllability are improved, and the reliability is better.

A mass damper device includes a tubular housing having a first and a second longitudinal end; at least one damping mass which is received in the tubular housing with a circumferential clearance; a first resilient element and a second resilient element. At least one end closure is arranged at the first or second longitudinal end. The housing and the end closure have cooperating mounting surfaces which define a longitudinal mounting position of the first and second end closures. The mounting surfaces are arranged such that the first and second resilient elements are compressed between the damping mass and the end closure, when the first and second end closures have been mounted, at the longitudinal mounting position, to the housing.

The invention discloses a multi-mode direction self-adaptive control method for an electromagnetic valve of a shock absorber, and belongs to the field of vehicle shock absorption control. According to the method, multi-mode signals such as vehicle body acceleration and suspension displacement are collected and preprocessed, working condition modes are divided based on the vehicle speed, the vibration dominant frequency and the roll angle, the damping direction opening ratio of the compression stage and the rebound stage is set according to different working conditions, parameters are dynamically adjusted in combination with the vibration amplitude and frequency, and a control signal is generated to drive an electromagnetic valve to act; meanwhile, a low-power-consumption mode triggered by a vibration energy threshold value and an energy recovery function are achieved, and driver habit self-learning and virtual estimation when a sensor breaks down are achieved through machine learning. According to the method, self-adaptive adjustment of the damping force under the complex working condition is achieved, vehicle driving smoothness and control stability are improved, system energy consumption is reduced, and system adaptability and reliability are enhanced.

The present invention provides a liquid rubber composite node for reducing vehicle wheel-rail wear and vibration noise based on liquid damping, comprising a mandrel with a mandrel ball in a middle, rubber layers vulcanized and bonded around the mandrel ball, and an inner sleeve vulcanized and bonded with the rubber layer at a periphery of the rubber layers; a front cavity and a rear cavity with rubber layers at cavity bottoms are arranged in the inner sleeve on a front side and a rear side of the liquid composite node respectively; the mandrel ball is provided with a flow channel for communicating the front cavity and the rear cavity; the front cavity and the rear cavity are flat, the axial widths of the axial sections of the two cavities are greater than radial heights, and the front cavity, the rear cavity and the flow channel are filled with liquid. The present invention can achieve the variable stiffness characteristic of low static stiffness and high dynamic stiffness of a single stage suspension, promote the upgrade of vibration and noise reduction level technologies in the railway transit industry, and help the safe, high-speed, green and intelligent development of railway transit.

The utility model belongs to the technical field of shock absorbers, and particularly relates to a hydraulic damping adjusting device of a shock absorber, the shock absorber comprises a hydraulic cylinder and a piston rod sleeved with a piston valve body, the piston valve body divides an inner cavity of the hydraulic cylinder into an upper oil cavity and a lower oil cavity, the piston rod is provided with a throttling channel, and a throttling rod axially slides on the piston rod. A pre-tightening spring is arranged between the throttling rod and the throttling channel, the hydraulic damping adjusting device comprises a hydraulic adjusting end cover, an adjusting cavity is formed in the hydraulic adjusting end cover, and the adjusting cavity and the throttling rod are matched with a hydraulic push rod on the hydraulic adjusting end cover through a plunger to be in transmission connection. According to the utility model, the throttle lever is driven to axially move in a hydraulic mode so as to adjust the flow area of the throttle channel and realize the damping force adjustment of oil flowing, so that the problems of time and labor waste and low adjustment efficiency caused by mechanical transmission matched adjustment are avoided, and meanwhile, the problem of leakage of damping oil in the prior art is effectively solved.