10results about How to "Improve damping effect" patented technology

The invention provides an inhaul cable vibration control device and a vibration control method. The device comprises a speed type damping unit and a tuned mass damping unit, the speed type damping unit and the tuned mass damping unit are arranged close to the cable beam anchoring end of the inhaul cable, the speed type damping unit comprises two speed type dampers, and the two speed type dampers are symmetrically arranged on the two sides of the cable face of the inhaul cable; the two ends of the speed type damper are connected with the inhaul cable and the ground respectively. The method comprises the following steps: determining the relative arrangement positions of a speed type damping unit and a tuned mass damping unit on the inhaul cable according to the determined broadband vibration order and narrow-band vibration order of the inhaul cable; and configuration parameters of the speed type damping unit and the tuned mass damping unit are determined, the inhaul cable is configured according to the determined damping coefficient of the speed type damper and the cable direction installation positions of the speed type damping unit and the tuned mass damping unit, and vibration control is achieved through the configured inhaul cable. The method has the advantages of guaranteeing the vibration reduction effect of the inhaul cable, being convenient to construct and the like.

The invention provides a pendulum type variable damping device and a vibration reduction configuration method thereof. The device comprises a mass unit, a swing arm unit and an energy consumption unit, a permanent magnet assembly of the energy consumption unit comprises a plurality of annular permanent magnets, a conductor plate of the energy consumption unit is a concave curved plate, and the center of the annular permanent magnets and the center of the concave curved plate are oppositely arranged. The method comprises the steps of calculating an optimal value of an initial damping constant of an energy consumption unit according to configuration parameters of a device, setting the radian of a conductor plate in the energy consumption unit to be 0, and enabling the initial damping constant generated by the energy consumption unit to be consistent with the optimal value of the initial damping constant through finite element analogue simulation. The optimal number and spacing of the annular permanent magnets and the minimum spacing between the annular permanent magnets and the conductor plate are determined; and continuously adjusting the curved surface radian of the conductor plate in the finite element model, so that the damping force generated by the energy consumption unit conforms to the theoretical damping force generated by the energy consumption unit, and determining the optimal curved surface radian of the conductor plate. The damper has the advantages of adjustable damping, high safety and reliability and the like.

The present invention provides a pendulum-type variable damping device and a vibration reduction configuration method thereof. The device includes a mass unit, a swing arm unit and an energy consuming unit. The permanent magnet assembly of the energy consuming unit includes a plurality of annular permanent magnets. The conductor plate of the energy consuming unit is an inwardly concave curved plate. The center of the annular permanent magnet is arranged relative to the center of the inwardly concave curved plate. The method includes calculating the optimal value of the initial damping constant of the energy consuming unit according to the configuration parameters of the device, setting the curvature of the conductor plate in the energy consuming unit to 0, making the initial damping constant generated by the energy consuming unit consistent with the optimal value of the initial damping constant through finite element simulation, determining the optimal number and spacing of annular permanent magnets, and the minimum spacing between the annular permanent magnet and the conductor plate; continuously adjusting the curvature of the conductor plate surface in the finite element model, making the damping force generated by the energy consuming unit consistent with the theoretical damping force generated by the energy consuming unit, and determining the optimal curvature of the conductor plate surface. The present invention has the advantages of adjustable damping, high safety and reliability, etc.

The invention discloses a marine empennage, which relates to the technical field of ships, and comprises a ship shell of a wave-shaped flat bottom structure, and the upper end of the ship shell is fixedly connected with a deck used for covering the space in a ship and horizontally dividing the space into layers; the side, close to a deck, of the hull is fixedly connected with a cabin used for storing materials and allowing sailors to work and live, the outer wall of the side, away from the cabin, of the hull is fixedly connected with an empennage plate body used for keeping course stability and providing rotation or trim adjusting capacity, and dynamic wingspan expansion mechanisms are arranged on the two sides of the upper end of the empennage plate body. An arc wing guide swing mechanism is arranged at the center of the upper end of the empennage plate body, a trapping screen wing mechanism is arranged on one side of the tail end of the empennage plate body, plate wings and an electric telescopic rod are matched with each other, and the stress area of the empennage can be increased by improving the sailing performance and expanding the wingspan; therefore, larger lift force is generated under the condition of the same wind speed or water flow.

The invention relates to the technical field of damping materials, in particular to a core-shell structure foaming agent with ammonium bicarbonate coated with nano-silica and a water-based damping coating prepared from the core-shell structure foaming agent. The foaming agent with the core-shell structure is prepared from the following raw materials in parts by weight: 8-10 parts of nano silicon dioxide, 2-5 parts of ammonium bicarbonate, 1-3 parts of diatomite, 1-2 parts of a coupling agent, 0.5-1 part of polyvinylpyrrolidone, 0.5-1 part of epoxy chloropropane and 7-12 parts of absolute ethyl alcohol. The foaming agent with the core-shell structure realizes controllable thermal decomposition through a synergistic effect of chemical bonding and physical adsorption, and the water-based damping paint prepared by utilizing the foaming agent effectively avoids the defects of bubbles, pinholes or cracks and the like caused by concentrated release of gas in a film forming process of a coating due to a controllable and stable gas release mechanism; the high-quality coating which is smooth and compact in surface, free of bubble marks and excellent in damping vibration attenuation effect is obtained, and it is hopeful to achieve the same or better vibration attenuation effect by reducing the overall using amount of materials.

A pipeline vibration reduction clamp comprises a clamp unit, the clamp unit can form the pipeline vibration reduction clamp surrounding a pipeline, the clamp unit comprises a clamp body, a groove structure is arranged on the clamp body, and a plurality of metal rubber blocks are arranged in the groove structure. The forming direction of the metal rubber block is consistent with the stress direction of the metal rubber block after the metal rubber block is assembled, and the forming direction of the metal rubber block is perpendicular to the direction of the upper bottom face and the lower bottom face of the metal rubber block. According to the metal rubber block, the density of the metal rubber block and the parameter of the pre-tightening amount are designed in a matched mode, the metal rubber block can obtain the minimum rigidity under the working condition of the same pressure intensity, and therefore the vibration reduction effect of the metal rubber block is improved; the contact surfaces between the metal rubber blocks and the pipelines are completely attached, the lower bottom surfaces of the metal rubber blocks make contact with the grooves in the hoops as much as possible, stress on the metal rubber pieces is more uniform, and the forming mode of the metal rubber blocks can improve the bearing capacity and the damping vibration attenuation effect of the metal rubber blocks at the same time.

The utility model belongs to the technical field of laminated busbars, and particularly relates to a plum-blossom-shaped notch damping structure on a busbar, which comprises the busbar, a supporting plate mounted on the busbar, a clamping plate mounted on the supporting plate and a guide port mounted on the supporting plate. Plug-in holes and six locking holes which are arranged around the plug-in holes by taking the centers of the plug-in holes as reference points are formed in the guide opening and the clamping plate, the locking holes are communicated with the plug-in holes, the mother row is arranged on the diode component, the plug-in holes in the clamping plate are attached to the first slot positions, the plug-in holes in the guide opening are attached to the second slot positions, and the plug-in holes in the guide opening are communicated with the plug-in holes. The shape between the plug-in hole and the six locking holes is similar to that of a plum blossom, vibration energy can be converted into heat energy or energy in other forms by increasing the flexibility and the damping effect of the copper plate, and therefore the vibration energy can be effectively absorbed and dispersed, and the damping purpose is achieved. Compared with the prior art, the plum-blossom-shaped notch damping structure on the busbar is provided.

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a piston rod damping device for a hydraulic oil cylinder, which comprises a piston rod, a fixing block is arranged at the tail end of the piston rod, a damping box is arranged on one side, far away from the piston rod, of the fixing block, and an air cavity is hermetically arranged in the damping box and is divided into a first cavity and a second cavity along the length direction of the piston rod; the first cavity is located on the side, away from the piston rod, in the damping box, a damping mechanism for conducting damping protection on the piston rod is arranged in the first cavity, and the damping mechanism comprises a push rod slidably arranged on the inner top wall of the damping box in a penetrating mode and a floating piston arranged at the end of the push rod. The push rod is parallel to the length direction of the piston rod and matched with the first cavity, a connecting ring used for being connected with external equipment is arranged on the side, extending out of the damping box, of the push rod, and a plurality of through holes used for generating the damping effect are distributed in the floating piston in the circumferential direction. The effect of prolonging the service life of the hydraulic oil cylinder is achieved.

This invention relates to the field of electro-hydraulic actuator technology, specifically a high-precision anti-glare actuator, comprising an actuator cylinder, an actuator piston, a drive cylinder, a drive piston, a coil, a GMM rod, a preload cylinder, a bracket, a cold oil tank, an inlet valve, an outlet valve, and an oil pump. The preload cylinder is located below the drive cylinder and includes a limiting chamber and a buffer chamber from top to bottom. The bracket is located inside the buffer chamber, with its upper end face abutting against the lower end face of the GMM rod. The cold oil tank is located outside the preload cylinder. The inlet valve and outlet valve are located in the buffer chamber and the limiting chamber, respectively. The oil pump is installed between the inlet valve and the cold oil tank. This invention achieves rapid heat dissipation of the GMM rod by accelerating oil exchange during the GMM rod retraction process and changing the preload position and filtering oil impurities through oil exchange, thereby improving the actuator's precision and ensuring the long-term stability of the GMM rod, thus enhancing the actuator's anti-glare performance.