Piezoelectric vibration suppression system and vibration suppression method for hydroelastic vibration of marine propeller blade

A technology for marine propellers and propellers, which is applied in the directions of rotating propellers and rotary propellers, can solve the problems of complicated manufacturing processes and high manufacturing costs, achieve good promotion value and achieve the effect of stable work

Active Publication Date: 2019-03-29
JIANGSU UNIV OF SCI & TECH
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a piezoelectric vibration suppression system and vibration suppression method for the hydroelastic vibration of a marine propeller blade. The piezoelectric vibration suppression system and vibration suppression method have low energy consumption and good vibration suppression effect; To solve the problem of complicated manufacturing process and high manufacturing cost of the propeller with vibration suppression function in the prior art; the specific technical scheme is as follows:

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Piezoelectric vibration suppression system and vibration suppression method for hydroelastic vibration of marine propeller blade
  • Piezoelectric vibration suppression system and vibration suppression method for hydroelastic vibration of marine propeller blade
  • Piezoelectric vibration suppression system and vibration suppression method for hydroelastic vibration of marine propeller blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] combine Figure 1 to Figure 3 , in an embodiment of the present invention, a piezoelectric vibration suppression system for hydroelastic vibration of a marine propeller blade is provided, the piezoelectric vibration suppression system includes a propeller blade 1, a piezoelectric sensing device installed Dynamic integrated chip 2, laser vibrometer 3, spectrum analyzer 4, computer 5, signal processing and A / D conversion module 6, single chip microcomputer 7, amplitude comparison and D / A conversion module 8, reverse excitation module 9, electric charge An amplifier 10 and a piezoelectric shunt circuit 11, wherein the piezoelectric sensing and actuating integrated sheet 2 includes a piezoelectric sensing sheet 2-1 arranged at the central position and a piezoelectric actuating sheet arranged uniformly around the piezoelectric sensing sheet 2-2, the piezoelectric actuator 2-2 is used to generate reverse vibration signals to offset part of the vibration of the propeller blade...

Embodiment 2

[0030] refer to Figure 4 , in an embodiment of the present invention, a vibration suppression method of a piezoelectric vibration suppression system for hydroelastic vibration of a marine propeller blade is provided, which is applied to the above piezoelectric vibration suppression system for hydroelastic vibration of a marine propeller blade, and the vibration suppression method realizes The specific process is:

[0031] First, when the propeller blade 1 is vibrating, the amplitude comparison and the D / A conversion module 8 set the size as [A m ,A C ] amplitude range.

[0032] Then, during the vibration process of the propeller blade 1, the vibration signal of the propeller blade is measured by the laser vibrometer 3, and transmitted to the spectrum analyzer 4, and analyzed and processed by the computer 5; at the same time, the signal processing and A / D conversion module 6 Receive the electrical signal monitored by the piezoelectric sensor sheet and transmit it to the sin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a piezoelectric vibration suppression system and vibration suppression method for hydroelastic vibration of marine propeller blades. The piezoelectric vibration suppression system comprises a propeller blade, a piezoelectric sensing motion integrated sheet installed at the tip of the propeller blade, a laser vibrometer, a spectrum analyzer, a computer, a signal processing and A / D conversion module, single-chip microcomputer, an amplitude comparison and D / A conversion module, a reverse excitation module, a charge amplifier and a piezoelectric shunt circuit, wherein the piezoelectric sensing motion integrated sheet includes a piezoelectric sensing sheet arranged in the center position and piezoelectric motion sheets arranged uniformly around the piezoelectric sensingsheet, and the piezoelectric sensing motion integrated sheet is are designed for the propeller blade. By comparing an amplitude of a vibration signal of the propeller blade measured by the laser vibrometer and the piezoelectric sensing sheet with a specific amplitude, passive suppression can be achieved through the piezoelectric shunt circuit, or active suppression can be achieved by combining thereverse excitation module and the charge amplifier. The system has a good prospect of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of vibration suppression, and in particular relates to a piezoelectric vibration suppression system and a vibration suppression method for hydroelastic vibration of a propeller blade of a ship. Background technique [0002] The hydroelastic vibration of the propeller is one of the factors affecting the performance stability of the marine propeller. For the vibration of the propeller, the commonly used vibration suppression methods mainly include three forms: (1) Improve the structure of the propeller, including the use of sawtooth blade tips, The propeller shall be trimmed, the propeller with large skew shall be selected, and the propeller blade shall be added; (2) the propeller shall be made of composite material, or the cladding of composite material shall be added on the propeller blade; (3) the external vibration damping device shall be added, including the use of dynamic vibration absorber, Hydraulic sh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B63H1/15
CPCB63H1/15
Inventor 李冲陈孟熠方记文
Owner JIANGSU UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap