7results about How to "Improve high-speed stability" patented technology

The invention discloses a porous static pressure gas radial bearing based on piezoelectric shunt damping, and belongs to the technical field of static pressure gas bearings. Comprising a bearing shell, a bearing sleeve and a porous throttler which are arranged in the bearing shell in the axial direction, and a piezoelectric shunt damping module which is arranged between the bearing shell and the bearing sleeve and is axially fixed through a check ring. Wherein the piezoelectric shunt damping module is formed by connecting a force amplifier, a piezoelectric ceramic stack, a pre-tightening pressing block, a pre-tightening screw, a steel ball and a locking nut; the force amplifier is of an axisymmetric structure composed of two trapezoidal connectors, four thin-wall beams and two end plates. The piezoelectric shunt damping module is arranged in the bearing, vibration mechanical energy of the bearing sleeve is converted into electric energy through the piezoelectric ceramic stack, and net damping is provided for the bearing by consuming the electric energy generated by the piezoelectric ceramic stack through the external shunt resonance circuit, so that the amplitude of the rotor relative to the bearing at a high rotating speed is reduced; the high-speed stability of the bearing is improved.

This invention relates to the field of motorcycle technology and discloses a motorcycle reach angle adjustment mechanism. The frame has detachable flange seats at both the top and bottom. A bearing ring is embedded inside the flange seat, and an oil seal ring is embedded between the bottom of the bearing ring and the flange seat. The frame bore is coaxial (coaxial with the outer circle of the flange seat). The inner circle of the flange (bearing press-fit surface) and the outer circle of the flange are machined to form an angle. Users can remove the upper and lower flange seats, rotate them 180°, and reassemble them into the frame as needed to adjust the reach angle. During use, the reach angle of the entire motorcycle can be adjusted according to the vehicle's usage requirements. This satisfies both the handling sensitivity required for extreme track riding and the high-speed stability needed for long-distance motorcycle touring, providing different driving experiences and enjoyment with a single motorcycle.

The utility model relates to the technical field of textile machinery manufacturing, in particular to an active rapier opening device of a rapier loom. The mobile cam mechanism includes a mobile cam and a roller follower assembly. The swing mechanism is driven by the beating-up swing shaft to slightly deflect. And the moving cam performs reciprocating linear displacement motion under the action of the traction force from the swinging mechanism. The roller driven assembly is used as an assembly foundation of the mounting seat. The rapier opening block is used for pressing the rapier receiving head of the rapier so that the rapier receiving head can release yarn and is fixed to the installation base. In the process that the roller driven assembly is controlled by the cam profile of the movable cam to execute reciprocating type linear displacement motion, the mounting base can drive the rapier opening block to be close to / away from the rapier receiving head of the rapier. Thus, on one hand, the displacement precision of the rapier opening block is guaranteed, and then the reliability and accuracy of implementation of the follow-up rapier opening action process are improved; and on the other hand, the service life of the rapier receiving head and the service life of the rapier opening block are greatly prolonged.

The invention discloses an intelligent empennage control system and method based on multi-sensor fusion, and the method comprises the steps: employing an online deduced self-induced aerodynamic load as a known feedforward input, stripping the unsteady interference caused by the action of an empennage from original data through a decoupling type extended Kalman filtering algorithm, thereby obtaining a real net vehicle body posture, and achieving the control of the empennage. On the basis, accurate and coordinated control of the downforce is realized through a multi-target optimization decision based on a net state. In this way, in a high-performance driving scene, it can be ensured that the vehicle obtains excellent high-speed stability, meanwhile, ideal front and rear axle load distribution and steering responsiveness are maintained, and the dynamic control limit and driving safety of the vehicle are comprehensively improved.

The invention discloses a turbine tilting pad support thrust combination bearing, which belongs to the field of bearing design and comprises a support bearing, a thrust bearing and an adjustment plate. The support bearing adopts a tilting pad structure, and the thrust bearing adopts a Kingsbury type improved structure with an oil injection structure. The number of the thrust bearings is two, and the two thrust bearings are respectively arranged at the two ends of the support bearing. The number of the adjustment pads is two, and the two adjustment pads are respectively installed between the support bearing and the thrust bearing. The shaft is a split structure and is provided with an oil inlet structure. The installation structure has good stability and low processing difficulty. The tilting pad can be cooled, the friction power consumption is small, and the vibration is smooth. The bearing is very suitable for use in high-speed running equipment such as a turbine.

The invention discloses a tilting pad support bearing for a speed increasing gearbox, which belongs to the technical field of bearing design. The bearing comprises a bearing housing, a tilting pad, a pad back limit screw, an oil injection screw, a sealing end cover A, a sealing end cover B, an end cover fastening screw, a pad end face limit screw, a temperature measuring wire clamp, a wire clamp fastening screw and a flange. The sealing end cover A and the sealing end cover B are mounted at two ends of the bearing housing, the tilting pad is arranged in the bearing housing, the oil injection screw and the pad back limit screw are respectively arranged on the side wall of the bearing housing, the end cover fastening screws are respectively arranged on the sealing end cover A and the sealing end cover B, the pad end face limit screws are respectively installed between the sealing end cover A, the sealing end cover B and the tilting pad, the flange, the temperature measuring wire clamp and the wire clamp fastening screw are arranged on the sealing end cover B. The bearing has reasonable structural design, convenient processing, installation and maintenance, low power consumption, safety and reliability, and long service life.

The present application relates to the technical field of gas bearings, and provides a novel dual-rotation foil gas dynamic pressure bearing, comprising: a bearing sleeve, a foil, a top foil, a magnet, a retaining ring and a screw; the foil is connected by a plurality of "ZS"-shaped structures, and the "ZS"-shaped structures at the head and tail ends of the foil are nested and connected with each other. The "ZS"-shaped structures of the foil can expand and deform outwards after being stressed, and can automatically shrink after unloading, and have a certain support stiffness, and the sliding friction effect between the foil and the bearing sleeve provides damping for the bearing; the top foil is connected by a "triangular" support at the head and tail ends and a circular support. The arc surface is composed of a "triangle" support of the top foil nested in the "ZS" structure of the foil. After the foil is deformed, the "triangle" support pulls the arc surface of the top foil, and the top foil will slightly detach from the foil, changing the thickness and shape of the air film, which is beneficial to reducing the subsynchronous vibration of the rotor; the magnet is installed in the groove of the bearing sleeve, and the magnetic force acts on the foil to reduce the movement of the foil. When the foil moves, it cuts the magnetic flux lines generated by the magnet, generates eddy currents to consume energy, and provides damping for the bearing; the retaining ring is fixed to the bearing sleeve by screws to limit the axial movement of the foil and the top foil. This application has good stiffness and damping characteristics, allows the rotor to rotate in both directions, is simple in structure, does not require welding, and is easy to disassemble.