Excitation device

A technology of vibration excitation device and coil frame, which is applied in the direction of fluid using vibration, can solve the problems of workpiece fatigue damage, low vibration frequency, large amplitude, etc., so as to prevent fatigue cracks of the workpiece, prevent fatigue damage, and prevent the occurrence and development of the workpiece. Effect

Inactive Publication Date: 2009-10-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the excitation device is generally composed of an eccentric box, a high-speed DC motor and a high-precision speed control system. The frequency sweep range is 2000-10000r / min (33.3-166.7Hz). workpiece fatigue damage

Method used

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  • Excitation device
  • Excitation device

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0013] refer to figure 1 , figure 2 , the inventive vibrating device comprises a base 1, a bobbin 5 of a coaxial line device from inside to outside, an AC coil 10, a DC coil 9, an inner sleeve 4, a spring 2 and an outer sleeve 3, and the bobbin 5 has a central hole and several axial through holes 8 for cooling. In the specific example shown in the figure, there are 8 axial through holes of Φ3 in total, and the two ends of the 8 axial through holes are sealed with rubber nuts 13 respectively. The two end surfaces of the two convex rings 5-1 respectively have an annular channel 14 inside the outer convex ring, and the annular channel 14 communicates with the axial through hole 8, and each of the circumferential directions of the two outer convex rings 5-1 A copper hoop 11 is fastened. In the illustration, the upper copper hoop 11 is provided with a water inlet 12 co...

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Abstract

The vibration excitation device disclosed by the present invention includes a base, a coil skeleton, an AC coil, a DC coil, an inner sleeve, a spring and an outer sleeve from the inside to the outside of the coaxial line device, and the center hole of the coil skeleton is placed on the positioning boss of the base and fastened to the base, a giant magnetostrictive rod and a positioning block are built in the center hole of the coil frame, one end of the positioning block is in contact with the giant magnetostrictive rod, and the other end is placed in the center positioning concave hole of the inner sleeve . When working, the workpiece is fixed on the base of the excitation device or the bottom surface of the inner sleeve, and the giant magnetostrictive rod is in the mixed magnetic field generated by the AC coil and the DC coil. The telescopic rod produces telescopic deformation along the axial direction, and pushes the positioning block and the inner sleeve to reciprocate and vibrate at high frequency along the axial direction. The vibration excitation device of the present invention has simple structure and good heat dissipation, and high-frequency vibration can be conveniently realized by changing the frequency of the AC power supply, and the vibration frequency can reach 1000-3000 Hz, which can effectively prevent fatigue damage of workpieces.

Description

technical field [0001] The invention relates to an excitation device, in particular to an excitation device for generating high-frequency vibration in a vibration aging device. Background technique [0002] Elimination of residual stress of machined components is an important subject in mechanical manufacturing industry technology. Vibration aging (VSR) residual stress elimination technology has the characteristics of simple equipment, less investment, energy saving and environmental protection, and short processing time. [0003] At present, the existing and mature typical vibration aging devices at home and abroad are composed of vibrator, vibration parameter controller and vibration measuring sensor. Among them, the excitation device is generally composed of an eccentric box, a high-speed DC motor and a high-precision speed control system. The frequency sweep range is 2000-10000r / min (33.3-166.7Hz). Workpiece fatigue damage. Contents of the invention [0004] The obj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/08C21D10/00
Inventor 任耀新何闻
Owner ZHEJIANG UNIV
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