CN205681351U - A kind of wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester - Google Patents
A kind of wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester Download PDFInfo
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- CN205681351U CN205681351U CN201620626220.XU CN201620626220U CN205681351U CN 205681351 U CN205681351 U CN 205681351U CN 201620626220 U CN201620626220 U CN 201620626220U CN 205681351 U CN205681351 U CN 205681351U
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- piezoelectric
- housing
- main shaft
- piezoelectric vibrator
- limitting casing
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Abstract
The utility model relates to a kind of wind turbine gearbox monitoring eddy flow and encourages piezoelectric harvester, belongs to field of piezoelectric generation.Being cased with left wall plate, left axle sleeve, wheel rim, right axle sleeve and right wallboard on main shaft from left to right successively, end is equipped with baffle plate；Act against on the shaft shoulder on the left of the inner ring of left wall plate upper bearing (metal), act against on baffle plate on the right side of the inner ring of right wallboard upper bearing (metal)；There is certain angle between blade and wheel rim bus；Housing two ends are connected with left and right wallboard respectively, equipped with balancing weight on housing exterior walls；Two ends, housing left and right are respectively arranged with limitting casing and piezoelectric vibrator, and piezoelectric chip length and width is respectively smaller than the length and width of limitting casing cavity, and the length and width of metal substrate is respectively greater than the length and width of limitting casing cavity.Advantage characteristic: the fluid motion-activated piezoelectric vibrator generating being caused by rotation, without rigid shock and electromagnetic interference；Piezoelectric chip is subjected only to the compression of range-controllable, and reliability is high；Supporting without fixing, cantilever gear shaft and the coaxial occasion of multi-gear all can be applied.
Description
Technical field
The utility model belongs to gear monitoring and piezo-electric generating technical field, is specifically related to a kind of wind turbine gearbox monitoring and uses
Eddy flow encourages piezoelectric harvester.
Background technology
Gear-box is the critical component of wind power generating set, and its function is transmission power.When wind-driven generator runs well,
The rotating speed of wind wheel is relatively low, cause generator efficiency relatively low, therefore need to be by gear-box speedup to improve generating capacity and efficiency.Due to
Wind turbine gearbox is operated under speed change varying load environment, therefore easily breaks down；Additionally, maintenance is tired when wind turbine gearbox breaks down
Difficulty and cost are high, and wind turbine gearbox runs and maintenance cost may be up to the 30% of overall operation cost.Therefore, there has been proposed
The gear-box real-time monitoring system for state of various ways and method, to obtaining each relevant parameter of gear-box in real time, sending out in time
Now and solve problem, thus reduce device damage degree and maintenance cost.At present, the key element of wind turbine gearbox monitoring includes tooth
All many-sides such as the load of the moving components such as wheel, bearing and wheel shaft, vibration and temperature.
For the monitoring of gear and axle, preferable method is to be arranged on all kinds of sensing and monitoring systems on gear or axle
Or install near gear or axle, thus realize the direct-on-line monitoring of its running status；But this monitoring scheme is because being biography
Reliable, the sufficient supply of electric power that provides of sense monitoring system is difficult to popularization and application, and reason is: 1. gear and axle are in rotation
Motion state, it is impossible to pass through cable power supply；2. as used battery to power, need to often change because battery is limited, when
Battery electric quantity is not enough and will be unable to realize effectively monitoring when not changing in time；3. cantilevered axle and the end tooth thereof away from bearing block
When wheel and multiple gear are coaxial, all cannot be sent out by relative motion construction microminiature between swing pinion or axle and securing supports
Motor.In view of the monitoring system energy supply problem of wind turbine gearbox gear and axle, at present reality also cannot realize really anticipating
Real time on-line monitoring in justice.
Content of the invention
The power supply difficult problem being faced for existing wind turbine gearbox middle gear monitoring system, the utility model proposes a kind of wind
Electrical gearbox monitoring eddy flow encourages piezoelectric harvester.The utility model adopted implementation scheme is that on the main shaft of gear from a left side
It is cased with being provided with left wall plate, left axle sleeve, the vaned wheel rim of installation, right axle sleeve and the right wall being provided with import of outlet successively to right
Plate, spindle nose is provided with baffle plate through screw；Left wall plate and the right wallboard bearing on main shaft, on left wall plate through bearing holder (housing, cover) respectively
Act against on the shaft shoulder of main shaft on the left of inner ring, act against on baffle plate on the right side of the bearing inner race on right wallboard；Warp between wheel rim and main shaft
Bonded, there is certain angle between blade and wheel rim bus；The two ends of housing are respectively through screw and left wall plate and right wallboard phase
Even, the outer wall of housing is provided with balancing weight through screw；The left end of housing is sequentially installed with limitting casing and piezoelectric vibrator through screw,
Housing right-hand member is sequentially installed with limitting casing, piezoelectric vibrator and briquetting through screw；Described piezoelectric vibrator is by metal substrate and piezo crystals
Piece bonding forms, and piezoelectric vibrator free end is provided with frequency modulation gauge block by screw；When piezoelectric vibrator is installed, piezoelectric chip is close
Limitting casing install, piezoelectric chip length and width is respectively smaller than the length and width of limitting casing cavity, the length of metal substrate and
Width is respectively greater than the length and width of limitting casing cavity；Housing, left wall plate, right wallboard and piezoelectric vibrator collectively form work
Chamber.
In the utility model, for improving dynamic response characteristic, generating capacity and the reliability of piezoelectric vibrator, piezoelectric chip is
The thick PZT4 of 0.2～0.3mm, metal substrate is beryllium-bronze and metal substrate with the thickness of piezoelectric chip ratio for α=1～2.5, this
When piezoelectric vibrator generating capacity preferably, electric power bigger；Energy ratio refers to that variant thickness becomes than piezoelectric vibrator first order buckling
The ratio of electric energy produced by shape and maximum therein, first order buckling deformation refers to piezoelectric vibrator from free state to metal substrate
Abut in the deformation process on the spacing curved surface of limitting casing completely；Spacing curved surface is arc surface and its rational radius isWherein, α=hm/hpFor thickness ratio, hmAnd hpBe respectively metal substrate and
Piezoelectric chip thickness；Piezoelectric chip is the thick PZT4 of 0.2mm～0.3mm, and metal substrate is beryllium-bronze, and metal substrate and piezoelectricity
The ratio scope of the thickness of wafer is 1～2.5.
During inoperative, main shaft does not rotates, piezoelectric vibrator is vertical with main-shaft axis, in the outlet on left wall plate and right wallboard
Entrance is all blocked by piezoelectric vibrator；Under duty, when i.e. main shaft band moving vane rotates, owing to existing between blade and wheel rim bus
Angle, blade will force fluid right-to-left to flow, so that working chamber internal flow pressure changes: right wallboard side
Fluid pressure drop is low, the fluid pressure of left wall plate side increases, and is placed in the piezoelectric vibrator on left wall plate and right wallboard in fluid pressure
Flexural deformation all to the left reach a certain relatively-stationary dynamic balancing corner under the effect of power difference, hereafter just start of reciprocating vibration,
Fluid dynamic energy is converted into electric energy；The dynamic balancing corner of piezoelectric vibrator increases with the increase of the speed of mainshaft, when speed of mainshaft mistake
When fluid force suffered by height, piezoelectric vibrator is bigger, the metal substrate of the sweep of piezoelectric vibrator will bear against on limitting casing,
Thus avoid piezoelectric chip to damage because suffered stress is excessive.
Advantage and characteristic: 1. utilize and rotate the fluid motion-activated piezoelectric vibrator generating causing, without rigid shock and electromagnetism
Interference；2. piezoelectric chip is operated under compressive stress state and maximum stress is controlled；3. without fixing supporting, applied widely, outstanding
Arm axle gear and the coaxial occasion of multi-gear all can be applied, and can realize the gear on-line monitoring of real meaning.
Brief description
Fig. 1 is the section of structure of energy accumulator in one preferred embodiment of the utility model；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the structural representation of limitting casing in one preferred embodiment of the utility model；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the structural representation after one preferred embodiment Leaf of the utility model assembles with wheel rim；
Fig. 6 be piezoelectric vibrator energy than with thickness than relation curve.
Detailed description of the invention
Gear a is arranged on main shaft d, main shaft d is cased with from left to right successively be provided with left wall plate r, the left axle sleeve of outlet r1
C, the wheel rim m being provided with blade n, right axle sleeve j and the right wallboard p being provided with import p1, the end of main shaft d is provided with gear through screw
Plate k；Left wall plate r and right wallboard p is enclosed within main shaft d through bearing b respectively, acts against master on the left of the inner ring of the bearing b on left wall plate r
On the shaft shoulder of axle d, act against on baffle plate k on the right side of the inner ring of the bearing b on wallboard p；It is connected through key 1 between wheel rim m with main shaft d, leaf
There is certain angle Q between the bus of piece n and wheel rim m；The two ends of housing q are respectively through screw and left wall plate r and right wallboard p phase
Even, the outer wall of housing q is provided with balancing weight g through screw；The left end of housing q is sequentially installed with limitting casing i and piezoelectricity through screw
Oscillator f, housing q right-hand member is sequentially installed with limitting casing i, piezoelectric vibrator f and briquetting h through screw；Described piezoelectric vibrator f is by Metal Substrate
Plate f1 and piezoelectric chip f2 bonding form, and the piezoelectric vibrator f free degree is provided with frequency modulation gauge block e by screw；Piezoelectric chip f2
Installing near limitting casing i, piezoelectric chip f2 length and width is respectively smaller than the length and width of the cavity i1 of limitting casing i, metal
The length and width of substrate f1 is respectively greater than the length and width of the cavity i1 of limitting casing i；Housing q, left wall plate r, right wallboard p and
Piezoelectric vibrator f collectively forms working chamber；
In the utility model, for improving dynamic response characteristic, generated energy and reliability, the piezoelectric chip f2 of piezoelectric vibrator f
Be the PZT4 that 0.2～0.3mm is thick, metal substrate f1 be beryllium-bronze and metal substrate f1 and piezoelectric chip f2 thickness than for α=
1～2.5, now piezoelectric vibrator generating capacity is preferable, i.e. electric energy is bigger；Energy ratio refers to variant thickness than piezoelectric vibrator f
First order buckling deforms the ratio of produced electric energy and maximum therein, and first order buckling deformation refers to piezoelectric vibrator f from free shape
State abuts in the deformation process on the spacing curved surface i2 of limitting casing i completely to metal substrate f1；The spacing curved surface i2 of limitting casing i is
Arc surface, and the reasonable radius of spacing curved surface i2 isWherein, α=hm/hp
For thickness ratio, hmAnd hpIt is respectively the thickness of metal substrate f1 and piezoelectric chip f2.
During inoperative, main shaft d does not rotates, piezoelectric vibrator f is vertical with the axis of main shaft d, the outlet r1 on left wall plate r and the right side
Entrance p1 on wallboard p is all blocked by piezoelectric vibrator f；Under duty, i.e. when main shaft d band moving vane n rotates, due to blade n
And there is angle Q between the bus of wheel rim m, piece n will force fluid right-to-left to flow, so that working chamber internal flow pressure is sent out
Changing: the fluid pressure drop of right wallboard p side is low, the fluid pressure of left wall plate r side increases, and is placed in left wall plate r and You Bi
Piezoelectric vibrator f on plate p flexural deformation all to the left reach a certain relatively-stationary dynamic balancing under the effect of fluid pressure differential
Corner, hereafter just start of reciprocating vibration, fluid dynamic energy is converted into electric energy；The dynamic balancing corner of piezoelectric vibrator f is with main shaft d rotating speed
Increase and increase, when when main shaft d rotating speed is too high, suffered by piezoelectric vibrator f, fluid force is bigger, the bend of piezoelectric vibrator f
The metal substrate f1 dividing will bear against on limitting casing i, thus avoids piezoelectric chip f2 to damage because suffered stress is excessive.
Claims (1)
1. a wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester, it is characterised in that: on the main shaft of gear from left to right
It is cased with successively being provided with left wall plate, the left axle sleeve of outlet, fill vaned wheel rim, right axle sleeve and the right wallboard being provided with import, main shaft
End is equipped with baffle plate；Left and right wallboard respectively through bearing holder (housing, cover) on main shaft, act against main shaft on the left of the bearing inner race on left wall plate
On the shaft shoulder, act against on baffle plate on the right side of the bearing inner race on right wallboard；Through bonded between wheel rim and main shaft, blade and wheel rim bus
Between there is certain angle；Housing two ends are connected with left and right wallboard through screw respectively, and the outer wall of housing is provided with balancing weight；Shell
Body left end is sequentially installed with limitting casing and piezoelectric vibrator through screw, housing right-hand member through screw be sequentially installed with limitting casing, piezoelectricity shakes
Son and briquetting；Piezoelectric vibrator is formed by metal substrate and piezoelectric chip bonding, and piezoelectric vibrator free end is equipped with frequency modulation gauge block；Pressure
Electricity wafer is the thick PZT4 of 0.2～0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620626220.XU CN205681351U (en) | 2016-06-15 | 2016-06-15 | A kind of wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620626220.XU CN205681351U (en) | 2016-06-15 | 2016-06-15 | A kind of wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205681351U true CN205681351U (en) | 2016-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620626220.XU Expired - Fee Related CN205681351U (en) | 2016-06-15 | 2016-06-15 | A kind of wind turbine gearbox monitoring eddy flow encourages piezoelectric harvester |
Country Status (1)
| Country | Link |
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| CN (1) | CN205681351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359813A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of tunnel driving air-flow causes the energy accumulator that shakes |
-
2016
- 2016-06-15 CN CN201620626220.XU patent/CN205681351U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359813A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of tunnel driving air-flow causes the energy accumulator that shakes |
| CN107359813B (en) * | 2017-08-17 | 2019-02-22 | 浙江师范大学 | A kind of tunnel driving air-flow cause vibration energy accumulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20170615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |