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CN-121831196-B - Acceleration dynamic measurement system under belt pulley high-speed operation condition

CN121831196BCN 121831196 BCN121831196 BCN 121831196BCN-121831196-B

Abstract

The invention relates to the technical field of acceleration measurement, and discloses an acceleration dynamic measurement system under the working condition of high-speed running of a belt pulley, which comprises a main matrix module, an inertial decoupling module, a magnetic coupling module, a signal sensing module and an oscillation suppression module, wherein the inertial decoupling module is embedded with the main matrix module through an inclined conical surface interface, centrifugal force is generated by high-speed rotation to drive the inertial decoupling module to generate radial expansion, the radial expansion is converted into normal approaching displacement through the geometric constraint of the inclined conical surface interface, the magnetic circuit self-compensation device is used for compressing a magnetic circuit air gap and counteracting magnetic flux density attenuation, the signal sensing module senses magnetic flux transient when the inertial decoupling module generates angular offset relative to the main matrix module, induced voltage data is output, and the oscillation suppression module utilizes eddy currents to generate electromagnetic moment to stabilize mechanical oscillation.

Inventors

  • WU YILIAN
  • LUO YUNFENG

Assignees

  • 龙岩阿赛特汽车零部件制造有限公司

Dates

Publication Date
20260508
Application Date
20260310

Claims (8)

  1. 1. An acceleration dynamic measurement system under a high-speed operation condition of a belt pulley, which is characterized by comprising: The main matrix module is connected with the inertial decoupling module through an air gap compensation module, and the air gap compensation module forms an inclined conical surface interface with a preset inclination angle; the magnetic coupling module comprises an inner magnetic pole unit and an outer magnetic pole unit which are respectively arranged at two sides of the inclined conical surface interface, and a working air gap is arranged between the inner magnetic pole unit and the outer magnetic pole unit and is used for establishing magnetic torsion constraint between the main matrix module and the inertial decoupling module; The inertial decoupling module is used for generating radial elastic deformation by utilizing centrifugal force generated by high-speed operation, the air gap compensation module is used for converting the radial elastic deformation into displacement along the normal direction of the inclined conical surface interface based on the geometric constraint of the inclined conical surface interface so as to compress a working air gap and counteract magnetic induction intensity attenuation caused by the radial elastic deformation, the half cone angle of the inclined conical surface interface of the air gap compensation module is configured in such a way that when the main matrix module is operated, the air gap compression amount caused by the displacement is equal to the component of the radial deformation amount of the inertial decoupling module caused by the centrifugal force in the normal direction of the inclined conical surface interface so as to maintain the static torsional rigidity of the magnetic coupling module, and the real-time normal air gap delta at the air gap compensation module meets the following quantitative relation: , wherein, For the initial air gap length of the main matrix module when stationary, Δr is the radial displacement of the inertial decoupling module due to centrifugal force, and θ is the half cone angle of the inclined cone interface relative to the rotation axis of the main matrix module; the signal sensing module is used for sensing magnetic flux transient when the inertial decoupling module generates angular offset relative to the main matrix module and outputting induction voltage data representing acceleration; The oscillation suppression module comprises a conductive unit fixed on the main matrix module, wherein the conductive unit stretches into an edge leakage magnetic field generated by the magnetic coupling module and is used for suppressing mechanical oscillation of the inertial decoupling module by utilizing braking moment generated by cutting a magnetic induction wire.
  2. 2. The system of claim 1, wherein the magnetic poles of the inner magnetic pole unit and the outer magnetic pole unit of the magnetic coupling module are alternately arranged in a circumferential direction to form a magnetic spring loop between the main matrix module and the inertial decoupling module.
  3. 3. The system of claim 1, wherein the signal sensing module comprises a plurality of groups of induction coil units distributed in a circumferential direction of the main matrix module, and wherein the plurality of groups of induction coil units are configured to generate the induction voltage data by inducing a magnetic flux change caused by a relative angular displacement of the inner magnetic pole unit and the outer magnetic pole unit when the main matrix module generates the angular acceleration.
  4. 4. The system for dynamically measuring acceleration under high-speed running conditions of a pulley according to claim 3, wherein the plurality of groups of induction coil units are of differential connection structure, and are used for counteracting radial runout interference signals generated by the main matrix module while superimposing the angular deviation induction signals so as to improve signal-to-noise ratio of the induction voltage data.
  5. 5. The system for dynamically measuring acceleration under high-speed running conditions of a belt pulley according to claim 1, wherein the conductive unit in the oscillation suppression module is made of a metal material with conductivity not lower than 3.5E7S/m, and the axial thickness of the conductive unit is smaller than the axial gap where the fringe leakage field is located.
  6. 6. The system according to claim 1, wherein the inertial decoupling module is made of a light alloy material with an elastic modulus between 65GPa and 80GPa, and is configured to generate a linear recoverable radial elastic deformation in a rotational speed range between 0r/min and 6000 r/min.
  7. 7. The system for dynamically measuring acceleration under high-speed running conditions of a belt pulley according to claim 1, wherein the output end of the signal sensing module is electrically connected with a signal processing subsystem, and the signal processing subsystem comprises a pre-amplifying module and a low-pass filtering module with a cut-off frequency of 500Hz, and is used for extracting and outputting induced voltage data.
  8. 8. The system for dynamically measuring acceleration under high-speed operation of a pulley according to claim 1, wherein the permanent magnet units in the magnetic coupling module are arranged in a halbach array for strengthening magnetic flux density at the inclined conical surface interface and weakening magnetic field distribution at the back side of the main matrix module so as to improve sensitivity of the signal sensing module.

Description

Acceleration dynamic measurement system under belt pulley high-speed operation condition Technical Field The invention relates to an acceleration dynamic measurement system under a high-speed running condition of a belt pulley, and belongs to the technical field of acceleration measurement. Background In the state monitoring and feedback control of the power transmission system, the angular acceleration of the belt pulley is a core physical parameter for representing transmission slip, load abrupt change and shafting torsional vibration, and the current mainstream technical mode in the industry adopts a photoelectric encoder or a rotary transformer to collect an angular displacement signal and utilizes a microprocessor to calculate the acceleration according to discrete differential logic. However, when the belt pulley is in a high-speed operation working condition, high-frequency mechanical disturbance generated by manufacturing tolerance, belt tension dynamic change and bearing play is superposed on a rotating speed signal as phase noise, as a difference operator has high-pass characteristic in mathematic nature, high-frequency noise is amplified in an operation process, output signal distortion is caused, in order to restrain noise, post low-pass filtering is carried out in an operation link, but filtering treatment causes phase lag of a measured signal on a time axis, system response delay is caused, transient physical process cannot be reflected in real time, contradiction between filtering precision and sacrifice dynamic response effectiveness is caused, the principle constraint of the existing difference sampling system is that the sensitivity of a mathematical derivative mechanism to the high-frequency disturbance is difficult to eliminate from a physical source even if the sampling frequency is increased, and besides the limitation of hardware acquisition logic, the algorithm control level has defects, for example, the Chinese patent with the authority bulletin number of CN109883712B discloses a method for measuring engine cylinder rotation vibration, two acceleration sensors are arranged on a cylinder body, and three-dimensional vector cross product operation is used for calculating angular acceleration. Therefore, how to construct a measuring framework which does not depend on discrete differential operation and directly captures the physical eigenvalue of acceleration becomes the technical problem to be solved by the invention. Disclosure of Invention In order to solve the problems in the background technology, the technical scheme of the invention is as follows, an acceleration dynamic measurement system under the working condition of high-speed operation of a belt pulley comprises: The main matrix module is connected with the inertial decoupling module through an air gap compensation module, and the air gap compensation module forms an inclined conical surface interface with a preset inclination angle; the magnetic coupling module comprises an inner magnetic pole unit and an outer magnetic pole unit which are respectively arranged at two sides of the inclined conical surface interface, and a working air gap is arranged between the inner magnetic pole unit and the outer magnetic pole unit and is used for establishing magnetic torsion constraint between the main matrix module and the inertial decoupling module; The inertial decoupling module is used for generating radial elastic deformation by utilizing centrifugal force generated by high-speed operation, and the air gap compensation module is used for converting the radial elastic deformation into displacement along the normal direction of the inclined conical surface interface based on the geometric constraint of the inclined conical surface interface so as to compress the working air gap and counteract the magnetic induction intensity attenuation caused by the radial elastic deformation; the signal sensing module is used for sensing magnetic flux transient when the inertial decoupling module generates angular offset relative to the main matrix module and outputting induction voltage data representing acceleration; The oscillation suppression module comprises a conductive unit fixed on the main matrix module, wherein the conductive unit stretches into an edge leakage magnetic field generated by the magnetic coupling module and is used for suppressing mechanical oscillation of the inertial decoupling module by utilizing braking moment generated by cutting a magnetic induction wire. Preferably, the half cone angle of the beveled interface of the air gap compensation module is configured such that, when the main matrix module is in operation, the amount of air gap compression caused by displacement is equal to the component of the radial deformation of the inertial decoupling module in the direction of the normal of the beveled interface caused by centrifugal force to maintain the static torsional stiffness of the magnetic coupling module. Prefer