CN205490236U - Piezoelectricity wind power generation device - Google Patents

Abstract

The utility model relates to a piezoelectricity wind power generation device belongs to electricity generation technical field. The piezoelectricity roof beam is bonded by base plate and single crystal piezoceramics piece to form, the free end of piezoelectricity roof beam is connected with the additional mass, the additional mass comprises two blocks of ya keli boards and copper billet and bolt, two bolted connection on the other end warp of piezoelectricity roof beam are on the turning block, and the turning block links to each other through the pivot with the base for the turning block can enclose about shaft rotation, the piezoelectricity roof beam becomes certain windward angle alpha with the direction of the wind comes from, and windward angle alpha can be through pivot rotation regulation size, the piezoelectricity roof beam connects out the wire can be used for the external circuit board. The utility model discloses a characteristic is simple structure, is applicable to the low wind speed of nature.

Description

A kind of piezoelectricity wind electricity generating system

Technical field

The invention belongs to technical field of energy recovery, be specifically related to a kind of piezoelectricity wind electricity generating system.

Background technology

Field microminiature remote sensing monitoring system is the most gradually used by multiple fields with its most easy feature, but its Power supply mode is main or based on chemical cell, it is big that chemical cell exists volume, is difficult to integrated, and service life is short, need Periodic replacement, or the most in time replacing not enough once battery electric quantity cannot complete the remote transmission of monitoring information, and change Old and useless battery contained by heavy metal environment also can cause serious pollution be difficult to meet use demand.Generally field microminiature Remote sensing system is arranged on uninhabited or part of having inconvenient traffic, the big and one-tenth according to the power supply mode difficulty laying cable This is the highest.Therefore, for making field microminiature remote sensing monitoring system extensively be applied, it is necessary to first solve its powerup issue.

In recent years, miniature piezoelectric electromotor with its simple in construction, without electromagnetic interference, do not generate heat and the advantage such as easy of integrationization and Being widely used, be particularly suited for the self-powered of wireless sensing monitoring system, certain form of piezoelectric generator is a lot Field finds application, such as the field such as Digiplex, Tire Pressure Monitor System.The most ripe miniature piezoelectric electromotor is all Generate electricity based on the vibrational energy in environment or manual operation, and for the sensing and monitoring system of field, seldom exist and make pressure The vibration source of electric generator vibrating power-generation.And wind energy is widely present in field, and reserves are big, are inexhaustible, nexhaustible Renewable resource, the wind energy in environment can be turned by miniature piezoelectric TRT based on wind energy and piezo-electric generating technical pattern Turn to electric energy, can be that field wireless monitor system provides sufficient, stable electric energy, there is good application prospect.

Summary of the invention

For a power supply difficult problem for field microminiature remote sensing monitoring system, the utility model proposes a kind of piezoelectricity wind energy TRT.This utility model adopted implementation scheme is that the piezoelectric beam bonding by metal basal board and piezoelectric ceramic wafer Free end connect have additional mass；Described additional mass is made up of two pieces of acrylic boards and copper billet and bolt；Described pressure The other end of electricity beam is bolted on moving block through two, and moving block is connected by rotating shaft with base so that moving block is permissible Around axis of rotation；Piezoelectric beam becomes certain angle α windward with direction of the wind comes from, and angle α can rotate adjusting size by rotating shaft windward； Piezoelectric beam picks out wire can be for used by the external circuit board.

Operation principle of the present utility model is: when blowing air over piezoelectric beam, can produce toll bar rotation street at the rear side of piezoelectric beam, When toll bar rotation street alternately come off in the both sides of piezoelectric beam time, periodic lift and resistance will be produced, make fluid pressure distribution, Size and the change of direction generating period, finally cause the cyclic bending of piezoelectric beam to vibrate, and then be electric energy by changes mechanical energy. Just produce resonance when vortex shedding frequency is equal with the natural frequency of TRT, thus improve TRT generating capacity. De-whirlpool frequency and TRT natural frequency can be expressed as:

${\mathrm{\ω}}_s=\frac{2{\mathrm{\πvS}}_t}{L}\·\sin \mathrm{\α},{\mathrm{\ω}}_n=\sqrt{\frac{M}{K}}$

In formula, v is wind speed, and L is the total length of piezoelectric beam and additional mass, S_tFor Strouhal number, K and M is for being respectively The equivalent stiffness of TRT and equivalent mass.When angle windwardTime, take off whirlpool frequency and send out Electric installation natural frequency is equal, now TRT Energy Maximization.Therefore, it can according to wind speed size around, by changing The size of angle α and additional mass regulates de-whirlpool frequency and natural frequency windward, makes de-whirlpool frequency and natural frequency equal, makes to send out Electric installation runs more efficiently.

Characteristic of the present utility model is: simple in construction, it is adaptable to the low wind speed of nature.

Accompanying drawing explanation

Fig. 1 is the structural principle sketch of this utility model TRT；

Fig. 2 is piezoelectric beam schematic diagram；

Fig. 3 is piezoelectric beam and additional mass connection diagram；

Detailed description of the invention

Connected by the free end of the bonding piezoelectric beam 2 of metal basal board 8 and piezoelectric ceramic wafer 7 and have additional mass 1；Institute State additional mass 1 to be made up of two pieces of acrylic boards 11,12 and copper billet 10 and bolt 9；The other end of described piezoelectric beam 2 is through two Individual being bolted on moving block 3, moving block 3 is connected by rotating shaft 4 with base 5 so that moving block 3 can be around rotating shaft 4 turns Dynamic；Piezoelectric beam 2 becomes certain angle α windward with direction of the wind comes from, and angle α can rotate adjusting size by rotating shaft 4 windward；Piezoelectric beam 2 Picking out wire 6 can be for used by the external circuit board.

Operation principle of the present utility model is: when blowing air over piezoelectric beam 2, can produce toll bar rotation at the rear side of piezoelectric beam 2 Street, when toll bar rotation street alternately comes off in the both sides of piezoelectric beam 2, will produce periodic lift and resistance, make fluid pressure Distribution, size and the change of direction generating period, finally cause the cyclic bending of piezoelectric beam 2 to vibrate, and then by changes mechanical energy For electric energy.Just produce resonance when vortex shedding frequency is equal with the natural frequency of TRT, thus improve TRT and send out Power.De-whirlpool frequency and TRT natural frequency can be expressed as:

${\mathrm{\ω}}_s=\frac{2{\mathrm{\πvS}}_t}{L}\·\sin \mathrm{\α},{\mathrm{\ω}}_n=\sqrt{\frac{M}{K}}$

In formula, v is wind speed, and L is piezoelectric beam 2 and the total length of additional mass 1, S_tFor Strouhal number, K and M is respectively The equivalent stiffness of TRT and equivalent mass.When angle windwardTime, de-whirlpool frequency with TRT natural frequency is equal, now TRT Energy Maximization.Therefore, it can according to wind speed size around, by changing Become the size of angle α and additional mass 1 windward to regulate de-whirlpool frequency and natural frequency, make de-whirlpool frequency and natural frequency equal, TRT is made to run more efficiently.

Characteristic of the present utility model is simple in construction, it is adaptable to the low wind speed of nature.

Claims (1)

1. a piezoelectricity wind electricity generating system, it is characterised in that: piezoelectric beam is by substrate and monocrystalline piezoelectric potsherd is bonding forms；Institute The free end connection stating piezoelectric beam has additional mass；Described additional mass is made up of two pieces of acrylic boards and copper billet and bolt； The other end of described piezoelectric beam is bolted on moving block through two, and moving block is connected by rotating shaft with base so that moving block Can be around axis of rotation；Piezoelectric beam becomes certain angle α windward with direction of the wind comes from, and angle α can rotate regulation greatly by rotating shaft windward Little；Piezoelectric beam picks out wire can be for used by the external circuit board；When angle windwardTime, de- Whirlpool frequency is equal with TRT natural frequency, now TRT Energy Maximization, and in formula, v is wind speed, and L is piezoelectric beam and attached Add the total length of quality, S_tFor Strouhal number, K and M is respectively equivalent stiffness and the equivalent mass of TRT.