Inertial exciter with dual-coil single-moving magnet structure based on magnetic fluid heat dissipation
A moving magnet and magnetic fluid technology, applied in the field of inertial vibration exciters, can solve the problems of poor heat dissipation performance, complex installation structure and low energy density of the exciter, and achieve good damping characteristics, improved heat dissipation performance, and high force output. effect of ability
Active Publication Date: 2019-05-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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[0006] The object of the present invention is to provide an inertial vibrator with a double-coil single-moving magnet structure that adopts magnetic fluid heat dissipation to solve the shortcomings of the existing vibrator, such as poor heat dissipation performance, low energy density, and complicated installation structure. Using the inertial vibrator can enhance the heat dissipation performance of the vibrator, improve the life of the coil, and improve the reliability of its long-term and high-power operation
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[0032] The inertial vibrator based on the dual-coil single-moving magnet structure of the magnetic fluid heat dissipation described in the present invention will be described in detail below with reference to the drawings and embodiments.
[0033] refer to figure 1 , an inertial vibrator based on a magnetic fluid heat dissipation dual-coil single-moving magnet structure provided by the present invention includes: a moving magnet 1, a housing 2, an upper leaf spring 8, a lower leaf spring 9, an upper coil 13, and a lower coil 14 and ferrofluid 20. Both the upper leaf spring 8 and the lower leaf spring 9 are annular plate-shaped elastic structures, which are used to support the moving magnet 1 in the housing 2 and limit the non-axial displacement of the moving magnet 1. Both ends are symmetrically arranged annular tubular structures, so that the magnetic field generated by the moving magnet 1 forms a loop along the tube wall of the annular tubular structure, and an annular hole...
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The invention provides a magnetofluid-heat-dissipation-based inertia type vibration exciter of a double-coil single-action magnet structure. The inertia type vibration exciter comprises a movable magnet (1), an upper coil (13), a lower coil (14), plate springs, an outer shell (2) and magnetofluid (20). The movable magnet (1) is of an annular pipelike structure with the two ends in symmetric arrangement, so that a magnetic field generated by the movable magnet (1) forms a loop along the pipe wall of the annular pipelike structure. The upper coil (13) and the lower coil (14) are symmetrically located in two annular holes (23). After reverse alternating currents are introduced into the two coils, homodromous electromagnetism exciting force is generated among the upper coil (13), the lower coil (14) and the movable magnet (1), so that relative motion is generated between the movable magnet (1) and the outer shell (2), and vibrating excitation is formed. The magnetofluid (20) is poured into the annular holes (23) and used for conducting heat generated by the upper coil (13) and the lower coil (14) onto the movable magnet (1) for heat dissipation, and thus heat dissipation performance of the inertia type vibration exciter is enhanced.
Description
technical field [0001] The invention relates to the technical field of mechanical vibration, in particular to an inertial vibrator based on a magnetic fluid heat dissipation double-coil single-moving magnet structure. Background technique [0002] A vibration exciter (referred to as an exciter, also known as an actuator) is a vibration excitation device that converts electrical energy into mechanical energy. Driven by an input signal, it excites the target in the form of an output force to generate the expected vibration. With the advancement of technology, in various fields such as scientific research, military affairs, automobiles, entertainment, etc., as people's demand for vibration generation or control becomes stronger, the application of vibration exciters is becoming more and more extensive. [0003] According to the different transducer devices, the exciter can be divided into electromagnetic type, piezoelectric type, magnetostrictive type, hydraulic type and other ...
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IPC IPC(8): B06B1/04
Inventor 程晓斌孙红灵安峰岩杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI