CN1073749A

CN1073749A - A kind of synchronous resonant vibration prime mover

Info

Publication number: CN1073749A
Application number: CN 91108280
Authority: CN
Inventors: 石行
Original assignee: Xicheng Xinkai General Testing Factory Beijing City
Current assignee: Xicheng Xinkai General Testing Factory Beijing City
Priority date: 1991-12-20
Filing date: 1991-12-20
Publication date: 1993-06-30

Abstract

A kind of synchronous resonant vibration prime mover, it is applicable to mine and oil development, building and the conveying of particle object etc.It includes U-iron core, coil, rare earth permanent magnet oscillator and tension spring, it is characterized in that: coil input end is connected to the electronic commutation switch, and the commutation sensors that links to each other with the electronic commutation switch and its commutation is controlled is housed between rare earth permanent magnet oscillator and U-iron core.Use alternating magnetic field directly to promote oscillator vibration, and pass through the commutation of oscillator positioning control electronic commutation switch, realize the effect of " self-excitation ", can automatically operate on the resonant frequency of driving arrangement, simple in structure, the exciting efficiency height.

Description

A kind of synchronous resonant vibration prime mover

A kind of synchronous resonant vibration prime mover, it is applicable to mine and oil development, building and the conveying of particle object etc., belongs to a kind of vibration power source.

In work such as mine and oil development, building and the conveying of particle object, the dynamic power machine that all needs vibration shape, the mud conditioning sieve during as the pneumatic pick in the mining, vibrating separating sieve, oil drilling in the ore dressing, vibrator for building and as if the shaker belting that granular substances such as food, medicine or mineral use in transmission etc.And present vibration prime mover is to use rotation prime mover (motor) to drive off-centre or linkage mechanism to obtain vibrational energy and displacement more.The benefit of this structural type is to use prior art and product mix, but because vibration frequency is to determine (as the frequency of supply of motor) by external world's input, can not change with the difference of the eigentone of vibratory equipment, thereby energy utilization efficiency is very low.Simultaneously, the amplitude during owing to vibration is determined by off-centre or connecting rod, thereby can not be operated in resonance state.The minority vibrating machine is arranged, as pneumatic vibration sources such as pneumatic picks, use pressurized air to import as energy, though the vibration frequency of this device is by the eigentone decision of equipment of itself, be operated in resonant condition, but need a cover that compressed-air actuated pumping plant is provided when importing as energy because of use pressurized air, this all is unpractical in a lot of occasions.And the noise when using is very big.Other vibration prime mover is also arranged, as number of patent application is CN91109893 " push-pull vibration exciter ", the form that adopts electromagnetism directly to promote, though this method can be removed the restriction of rotating machinery from, simple in structure, but its vibration frequency by the frequency decision of input current, is a kind of " forced vibration " still.All not exclusively the same because of quality, rigidity, the damping of each equipment, so resonant frequency also just has difference, accomplish that making the frequency of exciting current is difficult for the requirement of resonant frequency just in time.

The objective of the invention is to invent a kind of resonant vibration prime mover, the form that it adopts electromagnetism directly to promote, simple in structure.Simultaneously, it uses the method by self vibrational feedback commutation, realizes " self-excitation ", guarantees that the vibration frequency that is produced is consistent with the resonant frequency of this driven equipment, reaches the highest capacity usage ratio.

Structure of the present invention as shown in Figure 1, it includes U sections core 1, is around in coil 2, rare earth permanent magnet oscillator 3 and tension spring 4 on the U sections core 1, it is characterized in that: coil 2 input ends are connected to electronic commutation switch 5, between rare earth permanent magnet oscillator 3 and U sections core 1 commutation sensors 6 is housed, commutation sensors 6 links to each other with electronic commutation switch 5 and its commutation is controlled.

The present invention in use, measure distance between rare earth permanent magnet oscillators 3 and the U sections core 1 by being contained in commutation sensors 6 between rare earth permanent magnet oscillator 3 and the U sections core 1, when this distance reaches maximum (or minimum), commutation sensors 6 output signals trigger electronic commutation switch 5 electric current in the coil 2 are commutated.At this moment, owing to after the current reversal in the coil 2, make the magnetic polarity of U sections core 1 opposite, oscillator 3 moves round about.Because moving to, the acting in conjunction of the elastic force of magnetic force and spring 4, oscillator 3 make between oscillator 3 and the iron core 1 apart from reaching minimum (or maximum).After distance between oscillator 3 and the iron core 1 reached minimum (or maximum), commutation sensors 6 is output signal once more, triggers the current reversal that electronic commutation switch 5 makes in the coil 2 once more.This process has realized driving the purpose that the exciting current commutation reaches self-excitation by rare earth permanent magnet oscillator 3 and 1 position of U sections core constantly repeatedly.

Working principle of the present invention be " push-pull vibration exciter " working principle of CN91109893 as number of patent application, also be to promote the rare earth permanent magnet oscillator vibration by the alternating magnetic field that electromagnetic coil produces, obtain the output of vibrational energy, different is, electrically driven (operated) a-c cycle among the present invention and commutation phase are to be produced by the position that self vibrates, therefore it is vibrative simple in structure that it not only has the direct driving of electromagnetism, driving force is big, structural strength to the source motivation requires advantages such as low, but also because of its vibration be " self-excitation ", belong to self-excited vibration, no matter so its vibration frequency oscillating mass, elasticity coefficient, the difference of damping, all equal resonant frequency all the time, make this prime mover that the highest energy utilization efficiency be arranged.

In the present invention, can also add an amplitude limit switch 7 in some positions of rare earth permanent magnet oscillator 3 range of movement, as shown in Figure 2.Amplitude limit switch 7 also links to each other with electronic commutation switch 5, when 3 motions of rare earth permanent magnet oscillator reach the position of amplitude limit switch 7, send signal, electronic commutation switch 5 cuts out, output current (no matter be forward or oppositely) not, thereby controlled the width of coil 2 electrical pulses, reached the purpose of regulating excitation energy, prevented that amplitude is excessive.Amplitude limit switch 7 can be two, respectively has one last between the next, also can have only one.Should there be certain advancement amount (after amplitude limit switch 7 is started working, the amount that the vibration width of cloth of rare earth permanent magnet oscillator 3 all will be certain above amplitude limit switch 7) mounting point of amplitude limit switch 7.

The bridge-type inverter that electronic commutation switch 5 of the present invention can use controllable silicon to form also can use the inverter of being made up of the high-power darlington pipe, can also use as " a kind of high-power numerical control pressure regulation and the converter plant " of the patent No. as CN89209067.In the present invention, commutation sensors 6 can be used common photoelectricity or magnetic sensor, the position of the light intensity that records by photosensitive element or magneto sensitive element or the variation perception rare earth permanent magnet oscillator 3 of magnetic flux also can use electric capacity or ultrasound position transducer to measure the position of rare earth permanent magnet oscillator 3.Among the present invention, less demanding to the positional accuracy measurement of rare earth permanent magnet oscillator 3, mainly be the pace of change of measuring position.When speed is zero, just represent rare earth permanent magnet oscillator 3 position (ultimate range or minimum range) that reaches capacity.

Claims

1, a kind of synchronous resonant vibration prime mover, it includes U sections core 1, is around in coil 2, rare earth permanent magnet oscillator 3 and tension spring 4 on the U sections core 1, it is characterized in that: coil 2 input ends are connected to electronic commutation switch 5, between rare earth permanent magnet oscillator 3 and U sections core 1 commutation sensors 6 is housed, commutation sensors 6 links to each other with electronic commutation switch 5 and its commutation is controlled.