7results about How to "High damping efficiency" patented technology

The application discloses a kind of active shock absorption and steady control system and method based on voice coil motor, it is related to mechanical vibration control technical field.The method is by obtaining the phase signal synchronous with excitation source, directly from waveform look-up table index and output opposite phase drive instruction, drive voice coil motor to generate counterforce.Meanwhile, the system uses the residual acceleration of non-causal filtering processing in background, and adaptively updates waveform look-up table.The application adopts feedforward control, avoids the phase delay caused by filtering in traditional feedback control, can accurately suppress high-frequency periodic vibration with very low delay, significantly improves operation comfort.

The invention provides a bidirectional vibration reduction tuned mass damper for a tower and a vibration control method. The damper comprises a damper mounting frame, a moving mass block, a magnetic suspension damping assembly, an eddy current damping assembly, two groups of elastic recovery assemblies and two groups of horizontal guide assemblies which are arranged in a crossed and layered manner; the damper mounting frame is mounted at the top end of the tower; the moving mass block can be mounted in the damper mounting frame in a multidirectional horizontal moving manner through a horizontal guide assembly, and is mounted in a suspension manner through a magnetic suspension damping assembly arranged in the horizontal guide assembly; the eddy current damping assembly is integrally mounted in the magnetic suspension damping assembly; and the two groups of elastic recovery assemblies are respectively connected between the moving direction of the moving mass block and the damper mounting frame. According to the control method, a tower-damper coupling model is established, and current output to a driver of the damper is controlled and adjusted according to intensity parameters measured in real time. The device has the advantages of being good in damping and restraining effect, compact in structure and the like.

The application discloses a wind power blade liquid damper, a prefabrication method and a wind power blade. The liquid damper comprises an elongated pipe and damping liquid. The elongated pipe is arranged in parallel on the SS inner surface and the PS inner surface of the wind power blade at a preset interval, is located at the wind power blade tip, is arranged along the airfoil contour line of the wind power blade, and is connected to the leading edge and the trailing edge of the wind power blade at two ends. The central axis of each elongated pipe is perpendicular to the pitch shaft of the wind power blade. The damping liquid is filled in the elongated pipe at a preset volume filling rate, so that the damping liquid is constrained in the elongated pipe and flows back and forth along the airfoil contour line of the wind power blade. The centrifugal force direction of the blade is always perpendicular to the movement track of the damping liquid. The liquid turbulent flow is generated by bending the elongated pipe to absorb vibration energy, the first-order pendulum vibration of the wind power blade can be effectively inhibited, and the liquid damper can meet the maintenance-free characteristic requirement in the service life.

This invention provides a floor vibration damping structure and a rail vehicle. Multiple through holes are spaced apart along the floor's extension direction in the vibration damping body. Each through hole has a first inner wall and a second inner wall arranged opposite to each other along the expansion and contraction direction of the vibration damping body. The first and second inner walls have a separated state and an abutting state. In the separated state, the vibration damping body provides a first elastic force to the floor. When the vibration damping body is subjected to increased pressure, the first and second inner walls are in the abutting state, and the vibration damping body provides a second elastic force to the floor. By designing the vibration damping body with holes, a high-stiffness elastic body with low stiffness design is achieved, which is beneficial for reducing in-vehicle noise. It also achieves a variable stiffness design; that is, when the hole is compressed, it provides low-stiffness vibration damping support. When subjected to a large external load or passenger jumping impact load, the first and second inner walls are in the abutting state, the hole closes, and high-stiffness support is achieved, preventing excessive floor subsidence that could lead to floor damage. This improves vibration damping efficiency while satisfying lateral support stability.

This utility model discloses a vibration damping device, wall panel, and mechanical equipment based on a Mikaelian lens. The vibration damping device based on a Mikaelian lens includes: a conformal self-focusing lens; a vibration damping element disposed on a portion of the conformal self-focusing lens corresponding to at least one wave focus; and / or an energy harvesting element disposed on a portion of the conformal self-focusing lens corresponding to at least one wave focus. Thus, by disposing of the vibration damping element and / or the energy harvesting element on the portion of the conformal self-focusing lens corresponding to at least one wave focus, or on a portion of the conformal self-focusing lens adjacent to at least one wave focus, the vibration damping element can suppress vibrations transmitted to the conformal self-focusing lens, and the energy harvesting element can collect and utilize the vibrational energy transmitted to the conformal self-focusing lens.

The application provides an active mass damper with a linear motor, which comprises a linear motor, a mass unit and a mounting base, the linear motor and the mass unit are arranged side by side and are mounted on the damping target structure through the mounting base, wherein the linear motor comprises a motor mover and a linear winding arranged outside the motor mover; the mass unit comprises a mass block and two groups of universal hinge transmission assemblies, the two groups of universal hinge transmission assemblies are symmetrically arranged along the movement direction of the motor mover and are connected through a connecting screw; the mass block is slidably mounted on the mounting base and is connected with the main shaft of the motor mover through the two groups of universal hinge transmission assemblies. The application has the advantages of achieving excellent damping effect for multi-order modes, occupying small space and being effectively applicable to narrow space.

The invention discloses a variable damping hydraulic torsion damper suitable for a hybrid power vehicle, and belongs to the technical field of mechanical vibration control. The shell is connected with a driving side, a spring mounting window and an oil duct are arranged on a driving disc cover, the hub is connected with a driven side, an internal spline is arranged on a central shaft of a driven disc hub, so that the central shaft is connected with a power output shaft, a spring mounting window and a limiting bump are arranged on the central shaft, and a closed annular cavity oil duct is formed between the disc cover and the disc hub. A floating damping ring is arranged between every two adjacent limiting protruding blocks, the cavity is filled with viscous fluid damping media, and a throttling valve of a one-way valve structure is arranged in the annular cavity to control throttling output. Damping springs are installed in windows of the disc cover and the disc hub, and spring guide rods are placed on the two sides of the damping springs to form a damping device. The disc cover and the disc hub are sealed through a framework oil seal. The invention particularly discloses a high-elasticity vibration damper with a spring-mass system and a separately arranged hydraulic vibration damping system.