CN204376762U - A kind of novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT) - Google Patents

Abstract

The utility model relates to a kind of novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT), belongs to technical field of new energies.The seam interannular of support platen and cover plate is equipped with urceolus through screw, is pressed with inner core between the counterbore of support platen and cover plate; Two masses, magnet ring and nut form inertial mass jointly, and inertial mass to be enclosed within inner core and to be connected with support platen through spring; Two panels forms piezoelectric vibrator after its circular arc raised section is bonded with the sheet metal riveted joint of piezoelectric patches, and the wedge that piezoelectric vibrator and its two ends are riveted and magnetic patch form transducer; Two groups of transducer wedges are arranged in the dovetail groove on outer tube inner wall, the guide pillar of magnetic patch is placed in two groups of radial direction through hole on inner core sidewall respectively; The opposite pole of magnetic patch and magnet ring is near installing.Features and advantages: piezoelectric patches only bears compression, piezoelectric vibrator deformation and vibration direction is vertical and with inertial mass quality without direct relation, transducer and inertial mass-two degree freedom system that spring system is formed, therefore reliability is high, natural frequency is low, effective band is wide.

Description

A kind of novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT)

Technical field

The utility model belongs to technical field of new energies, is specifically related to a kind of novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT), for the extensional vibration energy regenerating of low frequency, large amplitude, high strength.

Background technology

For meet micropower electronic product and microminiature remote sensing and heeling-in monitoring system self-powered demand, avoid a large amount of waste battery contaminated environment, the research based on the microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the principles such as electromagnetism, electrostatic, thermoelectricity, electric capacity and piezoelectricity has become forward position both domestic and external focus.All kinds of Blast Furnace Top Gas Recovery Turbine Unit (TRT) has himself advantage and suitable application area, the advantage of piezoelectric type vibration Blast Furnace Top Gas Recovery Turbine Unit (TRT) is that structure is simple, be easy to make and microminiaturization on implementation structure and integrated etc., therefore the scope of application is wider, now progressively for fields such as transducer, health monitoring and wireless transmitting systems.

Utilizing piezoelectric to reclaim in environmental energy generating, all have more patent application both at home and abroad, wherein the overwhelming majority is application target with vibration energy regeneration.As everyone knows, for oscillatory type piezoelectric generator, only higher generating capacity and energy conversion efficiency can be reached when piezoelectric vibrator natural frequency is equal with environmental vibration frequency.But because the resonance frequency of piezoelectric vibrator self is usually higher, wherein the resonance frequency of piezoelectric cantilever reach hundreds of hertz, circular piezoelectric vibrator resonance frequency up to a few KHz, and environmental vibration frequency is generally tens hertz, even only has several hertz, therefore directly utilize the effect of piezoelectric vibrator collection environment vibrational energy not remarkable.For reducing the natural frequency of piezoelectric vibrator, the method of current employing directly installs lumped mass block in cantilever beam piezoelectric vibrators end or circular piezoelectric vibrator center, its drawback be work as installed mass larger time, even if piezoelectric vibrator just produces moderate finite deformation when non operating state, very easily damage because being out of shape excessive in work.The deformability that its reason is that piezoceramic material quality is very crisp, can bear is extremely limited, even its safe deformation amount of longer cantilever beam piezoelectric vibrators is also only grade.In actual life, conventional ambient vibration is mainly run by all kinds of vehicles, human motion is brought out, this type of vibration has the double grading of low frequency and large amplitude concurrently, and wherein the extensional vibration amplitude of the vehicles such as automobile, bicycle can reach several centimetres, even tens centimetres sometimes.Visible, existing portable vibration Blast Furnace Top Gas Recovery Turbine Unit (TRT) is difficult to obtain in practice apply widely.

Summary of the invention

The limitation such as, low frequency environments bad adaptability low for existing piezoelectricity oscillating generating set reliability, the utility model provides a kind of novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT), jolts and low frequency, large amplitude and high-intensity oscillation energy regenerating under the conventional environment such as human motion for all kinds of vehicles.The embodiment that the utility model adopts is: the platen periphery of support and center are respectively equipped with seam ring and counterbore, and the periphery of cover plate and center are respectively equipped with seam ring and counterbore; By screw, urceolus is installed between seam ring on support platen and the seam ring on cover plate, between the counterbore on support platen and the counterbore on cover plate, is crimped with inner core; Outer tube inner wall is provided with axial dovetail groove in uniform way, inner core sidewall is provided with in uniform way upper and lower two groups of radial direction through hole; On the column that mass one and magnet ring are enclosed within mass two successively and by nut check, mass one, mass two, magnet ring and nut form inertial mass jointly; Inertial mass is enclosed within the endoporus of inner core, and inertial mass is connected with support platen by spring; Magnet ring height is less than the axial distance on inner core sidewall between two groups of radial direction through hole, and during inoperative, magnet ring is equal to the distance at described two groups of through hole centers; The sheet metal that two panels is bonded with piezoelectric patches in its circular arc raised section forms piezoelectric vibrator after rivet, and the wedge that piezoelectric vibrator and its two ends are riveted and magnetic patch form transducer jointly, and the height of wedge is greater than the height of magnetic patch, and magnetic patch is provided with guide pillar; The wedge of two groups of transducers to be arranged on successively in the dovetail groove on outer tube inner wall and to be pressed on the platen of support by cover plate, and on described two groups of transducers, the guide pillar of magnetic patch is placed in two groups of radial direction through hole on inner core sidewall respectively; On transducer, the opposite pole of magnetic patch and inertial mass upper magnetic ring is near installing.

Maximally utilise vibrational energy for making piezoelectric vibrator generate electricity and avoid piezoelectric patches to damage because tension stress is excessive, when transducer is unassembled, on sheet metal, the least radius of circular arc external surface should be $R=(h_m+h_p)\{\mathrm{\α}+\frac{1}{2[1-\mathrm{\α}(1-\mathrm{\β})]}[{\mathrm{\α}}^2(1-\mathrm{\β})-1-\mathrm{\η}\frac{E_p}{T_p}\left]\right\},$ H in formula _pand h _mbe respectively the thickness of piezoelectric patches and sheet metal, α=h _m/ h _m+ h _p), $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\frac{\mathrm{\α\β}}{(1+k_{31}^2)},$ β=E _m/ E _p, E _pand E _mbe respectively the Young's modulus of piezoelectric patches and sheet metal, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric.

During inoperative, inertial mass is in poised state under the action of the spring, and on magnet ring two groups of transducers, the distance of magnetic patch is equal, because the opposite pole of magnetic patch and magnet ring is near installing, therefore in two groups of transducers piezoelectric vibrator be all in tension state and the power that bears equal; When Blast Furnace Top Gas Recovery Turbine Unit (TRT) encourages by extensional vibration in environment, inertial mass is up and down reciprocatingly vibrated along inner core endoporus, the distance between transducer end magnetic patch and inertial mass upper magnetic ring is caused to change: when inertial mass moves upward, distance on magnet ring and I group transducer between magnetic patch reduces and distance on II group transducer between magnetic patch increases, thus make that pulling force suffered by the piezoelectric vibrator in I group transducer increases, pulling force reduction suffered by piezoelectric vibrator in II group transducer; In like manner, when inertial mass moves downward, suffered by the piezoelectric vibrator in pulling force reduction, II group transducer suffered by the piezoelectric vibrator in I group transducer, pulling force increases; Along with inertial mass pumps continuously, piezoelectric vibrator will be in draw and shrink deformation state alternately, thus converts mechanical energy to electric energy.

In the utility model, because piezoelectric vibrator is pre-bent structure, the nature lower piezoelectric sheet before installation is not subject to External Force Acting, piezoelectric vibrator tension power effect during inoperative after installation, therefore piezoelectric chip bears compression; When inertial mass up-down vibration makes magnet ring reduce away from piezoelectric patches institute compression chord during magnetic patch close to the increase of piezoelectric patches institute compression chord, magnet ring during magnetic patch, therefore piezoelectric patches can not bear tension stress all the time, again because extensional vibration is vertical with the deformation direction of piezoelectric vibrator, oscillation intensity on piezoelectric vibrator deflection without direct impact, therefore Blast Furnace Top Gas Recovery Turbine Unit (TRT) reliability is high.

In the utility model, pulling force suffered by piezoelectric vibrator and piezoelectric patches institute compression chord depend on the vibration characteristics of inertial mass, therefore reduce the natural frequency of inertial mass and spring institute construction system by the quality increasing inertial mass and the method reducing spring rate, thus realize low-frequency vibration energy recovery; In addition, because inertial mass is different with the natural frequency of transducer from the natural frequency of spring institute construction system, therefore existence two optimum frequency sections made generating capacity the strongest, namely Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model is real is that two degree freedom system, effective band are wide.

Feature of the present utility model and advantage are: 1. utilize the dilatation of Prebending type piezoelectric vibrator length direction to generate electricity, in work, piezoelectric patches bears compression all the time, unlikelyly to damage because compression chord is excessive, and piezoelectric vibrator dilatation direction is vertical with ambient vibration direction, also reason environment pitch amplitude is excessive and damage, therefore Blast Furnace Top Gas Recovery Turbine Unit (TRT) reliability is high; 2. the Action of Gravity Field of inertial mass is on spring, and its quality size without direct impact on the vibration characteristics of piezoelectric vibrator, can adopt the natural frequency of larger mass inertia block and Low rigidity spring reduction Blast Furnace Top Gas Recovery Turbine Unit (TRT), realize low-frequency vibration energy recovery; What 3. transducer and inertial mass-spring system were formed is two degree freedom system, and effective band is wide.

Accompanying drawing explanation

Fig. 1 is the structural profile schematic diagram of Blast Furnace Top Gas Recovery Turbine Unit (TRT) in the utility model preferred embodiment;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the structural representation of piezoelectric vibrator in the utility model preferred embodiment;

Fig. 4 is the vertical view profile of Fig. 3;

Embodiment

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, periphery and the center of the platen 1a upper surface of support 1 are respectively equipped with seam ring and counterbore, and periphery and the center of cover plate 3 lower surface are respectively equipped with seam ring and counterbore; By screw, urceolus 2 is installed between the seam ring of the platen 1a upper surface periphery of support 1 and the seam ring of cover plate 3 lower surface periphery, between the counterbore of platen 1a upper surface of support 1 and the counterbore of the lower surface of cover plate 3, is crimped with inner core 6; Urceolus 2 inwall is provided with axial dovetail groove in uniform way, inner core 6 sidewall is provided with in uniform way upper and lower two groups of radial direction through hole 6b; The column 10a that mass 1 and magnet ring 9 are enclosed within mass 2 10 is successively locked by nut 7, and mass 1, mass 2 10, magnet ring 9 and nut 7 form inertial mass G jointly; Inertial mass G is enclosed within the endoporus 6a of inner core 6, and inertial mass G is connected with the platen 1a of support 1 by spring 11; The height of magnet ring 9 is less than the axial distance on inner core 6 sidewall between two groups of radial direction through hole 6b, and during inoperative, magnet ring 9 is equal to the distance at described two groups of through hole 6b centers; Two panels is bonded with piezoelectric patches h2 sheet metal h1 in its circular arc raised section forms piezoelectric vibrator h after rivet h3 rivets, the wedge 4 that piezoelectric vibrator h and its two ends are riveted and magnetic patch 5 form transducer H jointly, the height of wedge 4 is greater than the height of magnetic patch 5, and magnetic patch 5 is provided with guide pillar 5a; The wedge 4 of two groups of transducer H to be arranged on successively in the dovetail groove on urceolus 2 inwall and to be pressed on the platen 1a of support 1 by cover plate 3, and on described two groups of transducer H, the guide pillar 5a of magnetic patch 5 is placed in two groups of radial direction through hole 6b on inner core 6 sidewall respectively; On transducer H, magnetic patch 5 and the opposite pole of inertial mass G upper magnetic ring 9 are near installing;

Maximally utilise vibrational energy for making piezoelectric vibrator h generate electricity and avoid piezoelectric patches h2 to damage because tension stress is excessive, when transducer H is unassembled, on sheet metal h1, the least radius of circular arc external surface should be $R=(h_m+h_p)\{\mathrm{\α}+\frac{1}{2[1-\mathrm{\α}(1-\mathrm{\β})]}[{\mathrm{\α}}^2(1-\mathrm{\β})-1-\mathrm{\η}\frac{E_p}{T_p}\left]\right\},$ H in formula _pand h _mbe respectively the thickness of piezoelectric patches h2 and sheet metal h1, α=h _m/ (h _m+ h _p), $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\frac{\mathrm{\α\β}}{(1+k_{31}^2)},$ β=E _m/ E _p, E _pand E _mbe respectively the Young's modulus of piezoelectric patches h2 and sheet metal h1, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric.

Under the nature of inoperative, inertial mass G is in poised state under the effect of spring 11, magnet ring 9 is equal apart from the distance of the magnetic patch 5 in I group and II group transducer H, because the opposite pole of magnetic patch 5 and magnet ring 9 is near installing, thus in two groups of transducer H piezoelectric vibrator h be all in tension state and the power that bears equal; When Blast Furnace Top Gas Recovery Turbine Unit (TRT) encourages by extensional vibration in environment, inertial mass G up and down reciprocatingly vibrates along inner core 6 endoporus 6b, the distance between the magnet ring 9 on the magnetic patch 5 of transducer H end and inertial mass G is caused to change: when inertial mass G moves upward, distance between the magnetic patch 5 on magnet ring 9 and I group transducer H reduces and distance between magnetic patch 5 on II group transducer H increases, thus make that pulling force suffered by the piezoelectric vibrator h in I group transducer H increases, pulling force reduction suffered by piezoelectric vibrator h in II group transducer H; In like manner, when inertial mass G moves downward, suffered by the piezoelectric vibrator h in pulling force reduction, II group transducer H suffered by the piezoelectric vibrator h in I group transducer H, pulling force increases; Along with inertial mass G pumps continuously, piezoelectric vibrator h will be in draw and shrink deformation state alternately, thus converts mechanical energy to electric energy.

In the utility model, because piezoelectric vibrator h is pre-bent structure, the nature lower piezoelectric sheet h2 before installation is not subject to External Force Acting, piezoelectric vibrator h tension power effect during inoperative after installation, therefore piezoelectric chip h2 bears compression; When inertial mass G up-down vibration makes magnet ring 9 reduce away from piezoelectric patches h2 institute compression chord during magnetic patch 5 close to the increase of piezoelectric patches h2 institute compression chord, magnet ring 9 during magnetic patch 5, therefore piezoelectric patches h2 can not bear tension stress all the time, again because extensional vibration is vertical with the deformation direction of piezoelectric vibrator h, oscillation intensity on piezoelectric vibrator h deflection without direct impact, therefore Blast Furnace Top Gas Recovery Turbine Unit (TRT) reliability is high.

In the utility model, pulling force suffered by piezoelectric vibrator h and piezoelectric patches h2 institute compression chord depend on the vibration characteristics of inertial mass G, therefore reduce the natural frequency of inertial mass G and spring 11 construction systems by the quality increasing inertial mass G and the method reducing spring 11 rigidity, thus realize low-frequency vibration energy recovery; In addition, because the natural frequency of inertial mass G and spring 11 construction systems is different with the natural frequency of transducer H, therefore existence two optimum frequency sections made generating capacity the strongest, namely Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model is real is that two degree freedom system, effective band are wide.

Claims (1)

1. a novel piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT), is characterized in that: support platen periphery and center are respectively equipped with seam ring and counterbore, and the periphery of cover plate and center are respectively equipped with seam ring and counterbore; By screw, urceolus is installed between seam ring on support platen and the seam ring on cover plate, between the counterbore on support platen and the counterbore on cover plate, is crimped with inner core; Outer tube inner wall is provided with axial dovetail groove in uniform way, inner core sidewall is provided with in uniform way upper and lower two groups of radial direction through hole; On the column that mass one and magnet ring are enclosed within mass two successively and by nut check, mass one, mass two, magnet ring and nut form inertial mass jointly; Inertial mass is enclosed within the endoporus of inner core, and inertial mass is connected with support platen by spring; The sheet metal that two panels is bonded with piezoelectric patches in its circular arc raised section forms piezoelectric vibrator after rivet, and the wedge that piezoelectric vibrator and its two ends are riveted and magnetic patch form transducer jointly, and magnetic patch is provided with guide pillar; The wedge of two groups of transducers is arranged in the dovetail groove on outer tube inner wall, magnetic patch guide pillar is arranged in two groups of radial direction through hole on inner core sidewall; On transducer, the opposite pole of magnetic patch and inertial mass upper magnetic ring is near installing.