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Intelligent elastic bearing and control method

An intelligent elastic and bearing technology, which is applied to bearings, bearing components, shafts and bearings, etc., can solve problems such as not being able to actively adapt to changes in load

Inactive Publication Date: 2021-03-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is a single elastic bearing or a combined elastic bearing, they only realize multi-directional movement through the elastic deformation of the rubber, and can only achieve passive vibration reduction for the helicopter rotor system, and cannot actively adapt to the load change when the helicopter rotor system is working.

Method used

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  • Intelligent elastic bearing and control method
  • Intelligent elastic bearing and control method

Examples

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Effect test

Embodiment 1

[0025] Example 1: Combining figure 1 This embodiment will be described. This embodiment is a spherical tapered intelligent elastic bearing, which specifically includes: a first joint 1, a second joint 2, and a transition layer; the transition layer includes several piezoelectric polymer material layers 3 and several metal layers 4, and the compression The electropolymer material layers 3 and the metal layers 4 are alternately stacked. The first joint 1, the second joint 2, and the transition layer are bonded together by gluing, vulcanization and other technologies. Wherein the piezoelectric polymer material layer 3 and the metal layer 4 are stacked alternately, and keep concentricity and the thickness of each part of the same layer is uniform.

[0026] In the embodiment, the transition layer is a spherical cone, the first joint 1 and the second joint 2 are both circular flanges, and the diameter of the first joint 1 is smaller than the diameter 2 of the second joint; piezoel...

Embodiment 2

[0028] Embodiment 2: This embodiment is a spherical tapered intelligent elastic bearing, which adopts magnetorheological elastomer material and overlaps the metal layer, and other components and connection methods are the same as those in Embodiment 1. When the intelligent elastic bearing works, a magnetic field is applied to the magnetorheological elastomer material layer. When the external load changes, the intelligent elastic bearing controls the change of the external magnetic field, so that the magnetorheological elastomer material layer generates active force under the drive of the magnetic field to resist the external load and realize the active vibration reduction of the helicopter rotor system.

Embodiment 3

[0029] Embodiment 3: This embodiment is a spherical tapered intelligent elastic bearing, which uses a shape memory polymer material to overlap with a metal layer, and other components and connection methods are the same as in Embodiment 1. When the smart elastic bearing works, a temperature field is applied to the shape memory polymer material layer. When the external load changes, the intelligent elastic bearing controls the change of the external temperature, so that the shape memory polymer material layer generates active force under the drive of the temperature field to resist the external load and realize the active vibration reduction of the helicopter rotor system.

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Abstract

The invention discloses an intelligent elastic bearing and a control method. The intelligent elastic bearing comprises an intelligent polymer material layer, a metal spacer layer and two joints, wherein one joint is used for connecting blades, and the other joint is used for connecting a propeller hub; and an external electric field or magnetic field is applied to the intelligent polymer materiallayer. According to the elastic bearing, a rubber material overlapped with a metal layer in a traditional elastic bearing is changed into an intelligent polymer material, and the novel elastic bearingwith the metal layer and the intelligent polymer material layer overlapped with each other is formed. Compared with a traditional elastic bearing made of a rubber material, in the working process ofa helicopter rotor system, the performance of the bearing can be controlled to be changed by changing physical parameters such as the external electric field and the magnetic field, and therefore active or semi-active vibration reduction of the helicopter rotor system is achieved.

Description

technical field [0001] The invention belongs to the technical field of elastic bearings, in particular to an elastic bearing based on intelligent polymer materials. Background technique [0002] The rotor system is the core component of the helicopter, and the elastic bearing is the key functional component of the helicopter rotor system, which is mainly used to realize the connection between the blade and the hub. The elastic bearing can withstand the centrifugal, torsion, flapping and shimmy loads generated during the rotor motion of the helicopter, reduce the vibration generated by the rotor system, and prevent the helicopter from generating ground resonance. Since the elastic bearing can realize the functions of flapping hinge, shimmy hinge and variable pitch hinge at the same time, the structure of the helicopter rotor system is greatly simplified. At present, elastic bearings of various structural forms have been widely used in helicopter rotor systems. [0003] Trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/10F16C33/04F16F15/00B64C27/32B64C27/51
CPCF16C17/10F16C33/04F16F15/005B64C27/32B64C27/51
Inventor 王旦宋立瑶陈柏朱如鹏陈蔚芳王尧尧
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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