65results about How to "Change the damping force" patented technology

A damping valve includes a valve disk, a retainer, an inner peripheral side flow passage configured to include a valve disk through hole formed in an inner peripheral side of the valve disk and a retainer through hole formed in the retainer and allowing communication between one and other chambers, an outer peripheral side flow passage formed in an outer peripheral side of the valve disk and allowing communication between the one and the other chambers, and a leaf valve in the form of an annular plate arranged on a side of the retainer opposite to the valve disk and configured to openably close the inner peripheral side flow passage by an outer peripheral part. A flow passage area of the retainer through hole is not smaller than that of the valve disk through hole.

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

An electronic control unit determines driving force that is generated on wheels and has an identical absolute value and opposite directions to each other in order to suppress pitch behavior and / or heave behavior occurring on a vehicle body in association with travelling of a vehicle. Then, the unit controls the drive of in-wheel motors through an inverter based on the driving force. On the other hand, electronic control unit changes the damping forces of shock absorbers constituting suspension mechanisms in response to the pitch behavior and / or the heave behavior occurring on the vehicle body. In this way, by controlling one of the pitch behavior and the heave behavior that may occur in combination, enhancing of the occurrence of the other one that is not intended can be prevented effectively, and the occurrence of intended behavior on the vehicle body can be controlled independently.

The invention discloses a damping regulation device suitable for a magnetorheological damper. The damping regulation device comprises a magnetism isolation cover and a driving mechanism, wherein the magnetism isolation cover is arranged on a piston rod of the agnetorheological damper in a sleeving mode and located in a cylinder barrel of the agnetorheological damper, and the driving mechanism is used for providing driving force enabling the magnetism isolation cover to move axially along the piston rod. According to the damping regulation device suitable for the magnetorheological damper, the movable magnetism isolation cover is arranged in the cylinder barrel, and a magnetic field generated by a permanent magnet arranged on a piston assembly is shielded by regulating the position of the magnetism isolation cover; the nature of magnetorheological fluid is changed along with the change of the magnetic field, so that damping force of the damper is changed and damping regulation is achieved.

The invention relates to a clinical pulmonary function rehabilitation training device. The clinical pulmonary function rehabilitation training device comprises a cylindrical pipe, wherein a connectorand a sealing seat are detachably mounted at two ends of the cylindrical pipe respectively; a blowing nozzle is mounted at one end, far away from the cylindrical pipe, of the connector; a piston is arranged at the inner side of the cylindrical pipe; the piston is connected with an elastic assembly arranged at the inner side of the cylindrical pipe; the elastic assembly is connected with an adjusting mechanism mounted in the cylindrical pipe; a one-way air inlet valve and a one-way air outlet valve are mounted on a side wall of the cylindrical pipe respectively; an air outlet cavity sleeves theouter side of the one-way air outlet valve; a separation plate is fixed at the inner side of the air outlet cavity; a movable baffle plate is arranged at one side of the separation plate; and throughholes are formed in the movable baffle plate and the separation plate. A rotary ring is arranged and can be used for adjusting a passing area between the separation plate and the movable baffle plate, so that an air outlet speed is realized and further adjustment of a damping force is realized; meanwhile, blowing durability training of a user can be realized and a better lung training effect is realized.

A damping force change mechanism includes an on-off valve located in a through hole of a piston rod. The on-off valve opens / closes a third hydraulic oil passage that allows a first oil chamber on a free piston side and a second oil chamber between a first piston and a second piston to communicate with each other. The on-off valve includes an expanded diameter portion in the first oil chamber extending outward in the radial direction. The expanded diameter portion faces the entire opening edge of the through hole and tightly contacts an end surface of the piston rod. The magnitude of a damping force is easily changed, and a damping force characteristic in a case in which the damping force is large is stabilized.

The invention discloses a self-adjusting magnetorheological damper for vibration reduction of a pipeline. The self-adjusting magnetorheological damper for vibration reduction of the pipeline comprisesan upper pipe clamp, a lower pipe clamp, a piston rod, a cylinder cover, a damper cylinder body, a magnetic isolation cover, a spring upper pressing disc, a self-adjusting spring, a spring lower pressing disc, a permanent magnet, a magnetic isolation cover sealing cover, a magnetic isolation disc and magnetorheological damping fluid; the self-adjusting magnetorheological damper is applied to pipeline vibration reduction of petroleum and petrochemical industry, high temperature and high pressure, oil and gas transportation and inflammable and explosive media, and compared with an actively controlled magnetorheological damper and other self-adjusting magnetorheological dampers, the self-adjusting magnetorheological damper is simple in structure, convenient to disassemble and assemble, freeof complex threading and control parts, single in equipment fault point, convenient to maintain and capable of saving cost. According to Newton's first law and Hooke's law, the permanent magnet stretches and retracts in the closed magnetic isolation cover along with the vibration of the pipeline, the magnetic induction intensity exposed from the magnetic isolation cover is different due to different volumes of the permanent magnet exposed out of the magnetic isolation cover, the damping size of the magnetorheological damper is changed, and the vibration reduction function of the pipeline is realized.