Noise piezoelectric power generation self-powered magneto-rheological muffler used for motorbikes

A technology for piezoelectric power generation and self-supply energy, which is applied to piezoelectric effect/electrostrictive or magnetostrictive motors, noise reduction devices, generators/motors, etc. The noise reduction effect is not ideal enough to achieve the effect of sound absorption frequency bandwidth and sound power reduction

Active Publication Date: 2018-07-24
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing motorcycle exhaust mufflers mainly have the following problems: 1. The noise reduction effect is not ideal enough
Because there are mainly medium and low-frequency noise below 800HZ and high-frequency noise around 2000HZ

Method used

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  • Noise piezoelectric power generation self-powered magneto-rheological muffler used for motorbikes
  • Noise piezoelectric power generation self-powered magneto-rheological muffler used for motorbikes
  • Noise piezoelectric power generation self-powered magneto-rheological muffler used for motorbikes

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] A magnetorheological silencer for motorcycles with noise piezoelectric power generation and self-powered energy. It includes a hollow cylinder V. An air inlet pipe a is provided along the axis of one end of the cylinder V away from the axis. There is a trachea p; the cylinder V includes a shell b and a fixed body c. The fixed body c is provided with a number of cylindrical holes, and the cylindrical holes are provided with a magnetic cone X; the magnetic cone X is covered by a cylindrical permanent magnet d and magnetized The conical magnetorheological fluid on the permanent magnet d is composed of a h1; the cylinder V is divided into the first cavity A and the second cavity by the left partition g and the right partition m along the vertical axis of the cylinder V. The cavity B and the third cavity C, the air inlet pipe a communicates with the first cavity A, and the air outlet pipe p communicates with the third cavity C; the left partition g and the right partition m ar...

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Abstract

The invention relates to a motorbike muffler, in particular to a noise piezoelectric power generation self-powered magneto-rheological muffler used for motorbikes. The noise piezoelectric power generation self-powered magneto-rheological muffler comprises a hollow barrel. An air inlet pipe and an air outlet pipe are arranged at the two ends of the axis of the barrel correspondingly. The barrel comprises a shell and a fixing body. A plurality of cylindrical holes are formed in the fixing body, and magnetic cones are arranged in the cylindrical holes. The magnetic cones are composed of cylindrical permanent magnets and first conical magnetorheological fluid which is covered onto the permanent magnets after magnetization. The barrel is internally divided into a first cavity, a second cavity and a third cavity through a left partition plate and a right partition plate in the direction perpendicular to the axis of the barrel. A damping unit is arranged in the second cavity. A crankshaft inthe first cavity is sleeved with fan blades, and each fan blade is formed by bonding a circular ring-shaped piezoelectric crystal plate and a metal base plate. The piezoelectric power generation self-powered magneto-rheological muffler used for the motorbikes has the advantages and characteristics that continuous change of the acoustic impedance gradient of the magnetic cones and the fan blades are used for achieving dynamic active sound absorption, acoustic energy is converted into heat energy, and acoustic impedance can be self-adjusted.

Description

technical field [0001] The invention relates to a motorcycle muffler, in particular to a magneto-rheological muffler for motorcycles with self-powered noise piezoelectric power generation. Background technique [0002] With the improvement of the degree of industrialization, the degree of noise hazards is increasing day by day. The noise of motorcycles has become one of the main noise sources in the current urban environment noise, and the exhaust noise is the main noise source of motorcycles. The existing motorcycle exhaust muffler mainly has the following problems: 1. The noise reduction effect is not ideal enough. Because there are mainly medium and low-frequency noise below 800HZ and high-frequency noise around 2000HZ in the exhaust duct, and the existing muffler is mainly developed based on the principle of anti-spray and resistance compound noise reduction, which has poor noise reduction effect on low-frequency noise; 2 .Short service life. Exhaust gas flows at high ...

Claims

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Application Information

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IPC IPC(8): F01N1/18F01N5/02F01D5/14F01D15/12H02N2/18F16F9/53
CPCF01D5/141F01D5/147F01D15/12F01N1/18F01N5/02F16F9/535H02N2/185Y02T10/12
Inventor 王鸿云毕成赵爽孟国连高春甫胡永举
Owner ZHEJIANG NORMAL UNIVERSITY
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