SUMMERY OF THE UTILITY MODEL
The utility model provides a wind turbine tower section of thick bamboo measuring device and a tower section of thick bamboo can effectively overcome the high-cost or inaccurate problem of measurement that exists when current a tower section of thick bamboo is measured, can effectively improve a tower section of thick bamboo measuring accuracy, and with low costs.
The utility model provides a wind turbine tower section of thick bamboo measuring device, a tower section of thick bamboo includes first connecting cylinder and second connecting cylinder, the tip of first connecting cylinder is provided with first flange, the tip of second connecting cylinder is provided with the second flange, first connecting cylinder and second connecting cylinder pass through flange fixed connection, measuring device includes:
the inclination acceleration sensor group is fixedly arranged on the first flange through a first cantilever and comprises an inclination sensor and an acceleration sensor, and the inclination acceleration sensor group is arranged at the end part position, far away from the first flange, of the first cantilever.
In the wind turbine tower cylinder measuring device, the acceleration sensor is arranged on the inclination sensor.
In the wind turbine tower cylinder measuring device, the acceleration sensor is arranged at a position close to the inclination sensor.
In the wind turbine tower measuring device, the first flange is adsorbed with a permanent magnet;
the first cantilever beam is fixed on the permanent magnet through a bolt.
The wind turbine tower measuring device may further include:
and the acceleration sensor is fixedly arranged on the second flange through a second cantilever.
The utility model provides a wind turbine tower, the tower includes first connecting cylinder and second connecting cylinder, the tip of first connecting cylinder is provided with first flange, the tip of second connecting cylinder is provided with second flange, first connecting cylinder and second connecting cylinder pass through flange fixed connection;
an inclined acceleration sensor group is fixedly arranged on the first flange through a first cantilever and comprises an inclined sensor and an acceleration sensor, and the position of the end part of the first flange, far away from the first cantilever, is arranged on the first cantilever.
In the wind turbine tower, the acceleration sensor is arranged on the inclination sensor.
In the wind turbine tower, the acceleration sensor is arranged at a position close to the inclination sensor.
In the tower barrel of the wind turbine generator, a permanent magnet is adsorbed on the first flange;
the first cantilever beam is fixed on the permanent magnet through a bolt.
In the tower barrel of the wind turbine generator, the second flange is fixedly provided with the acceleration sensor through the second cantilever.
The utility model provides a wind turbine tower cylinder measuring device and a tower cylinder, through setting up inclination sensor and acceleration sensor at the flange department of a tower cylinder, can compromise tower cylinder slope and nonlinear deformation simultaneously, improve the accuracy of a tower cylinder slope deformation measurement; meanwhile, the inclination sensor and the acceleration sensor are arranged on the flange, so that the test cost is low, and the measurement requirement of the inclination deformation of the tower can be effectively met; the utility model discloses among the technical scheme, through set up acceleration sensor on two flanges respectively, can further take place to warp to the flange and measure, can avoid flange joint bad and lead to a tower section of thick bamboo to incline and the trouble that collapses.
Detailed Description
Fig. 1 is a schematic structural view of a wind turbine tower measuring device provided in an embodiment of the present invention; fig. 2 is an enlarged schematic view of the mounting structure of the measuring device at a in fig. 1. As shown in fig. 1-2, in the present embodiment, the tower barrel 1 is a bearing component in a wind turbine generator system, and includes a first connecting barrel 11 and a second connecting barrel 12, two opposite ends of the first connecting barrel 11 and the second connecting barrel 12 are respectively provided with a first flange 21 and a second flange 22, the first connecting barrel 11 and the second connecting barrel 12 are connected and fixed through the first flange 21 and the second flange 22 to form a tower barrel, and the first flange 21 and the second flange 22 are connected through a bolt 23; the first flange 21 is fixedly provided with an inclination acceleration sensor group 4 through the first cantilever beam 31, the inclination acceleration sensor group 4 comprises an inclination sensor 41 and a first acceleration sensor 42 which are both arranged at the end position of the first cantilever beam 31 far away from the first flange 21, and the first acceleration sensor 42 is fixedly arranged on the inclination sensor 41. In the embodiment, the inclination acceleration sensor group is arranged on the flange, so that the inclination of the tower barrel can be measured by using the inclination sensor, and the deformation of the tower barrel can be measured by using the inclination sensor and the acceleration sensor, so that the accuracy of measuring the inclination deformation of the tower barrel can be effectively improved; in addition, the inclined acceleration sensor group is arranged by using the cantilever, so that the installation of the inclined acceleration sensor group is facilitated, and meanwhile, the length of the cantilever can be utilized to improve the measurement accuracy of the inclined sensor and the acceleration sensor.
In this embodiment, as shown in fig. 2, the permanent magnet 5 is attached to the first flange 21, and the first cantilever 31 may be fixed to the permanent magnet 5 by a bolt, so that the cantilever can be conveniently mounted, and the convenience of mounting the cantilever is improved.
As can be understood by those skilled in the art, in practical application, the cantilever beam with a proper length can be arranged according to requirements, so that the response capability of the sensor can be effectively improved while the sensor arranged at the end part is ensured to be fixed relative to the tower drum, the measurement requirement of the inclination deformation of the tower drum is improved, and the accuracy and the reliability of the measurement of the inclination deformation of the tower drum are improved.
In this embodiment, as shown in fig. 2, the second flange 22 is fixedly provided with the second acceleration sensor 43 through the second cantilever beam 32, so that whether the first flange 21 and the second flange 22 are opened or closed can be determined through the measurement values of the first acceleration sensor 42 and the second acceleration sensor 43, and thus, whether the bolts 23 fixing the first flange 21 and the second flange 22 fail or not can be determined, and the tower inclination or collapse caused by the failure of the bolts 23 can be avoided.
In this embodiment, it is determined whether the first flange 21 and the second flange 22 are deformed badly, such as open-close, or not, specifically, it may be determined according to a component in the axial direction of the tower from among the measurement values of the acceleration sensors, and when the vertical component difference measured by the first acceleration sensor 42 and the second acceleration sensor 43 is large, it may be determined that the first flange 21 and the second flange 22 are deformed badly, such as open-close, or the like, and the bolt 23 may fail.
Fig. 3 is a schematic structural view of the embodiment of the present invention when the flange is opened. As shown in fig. 3, when the first flange 21 and the second flange 22 are opened, it is indicated that the bolts 23 connecting the first flange 21 and the second flange 22 may be deformed, and the bolts 23 may fail, at this time, the opening and closing angle of the first flange 21 and the second flange 22 may be determined by the acceleration values detected by the first acceleration sensor 42 and the second acceleration sensor 43, so as to determine whether the bolts fail, and inform the relevant personnel of processing in time, so as to avoid the tower inclination or collapse caused by the bolt failure. In particular, the opening and closing angle α at time tgap(t) is calculated using the following formula:
<math>
<mrow>
<msub>
<mi>α</mi>
<mi>gap</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>arctan</mi>
<mfrac>
<mrow>
<mi>a</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msup>
<mi>ω</mi>
<mn>2</mn>
</msup>
<mi>L</mi>
</mrow>
</mfrac>
</mrow>
</math>
in the formula, a (t) is a vertical component difference value of measurement values of the first acceleration sensor and the second acceleration sensor at the time t, ω is a frequency of acceleration amplitude fluctuation, and can be obtained by performing spectrum analysis on the acceleration measurement values, and L is the length of the cantilever beam.
It is right to the technical scheme of the utility model have better understanding, it is right below the embodiment of the utility model provides a slope deformation principle through slope acceleration sensor group measures a tower section of thick bamboo explains.
As will be appreciated by those skilled in the art, the tilt deformation of the tower is performed using the tilt sensor and the acceleration sensor described aboveDuring measurement, the deformation amount of the tower can be determined according to the measured values at multiple moments, specifically, the tower deformation can be decomposed into static deformation, quasi-static deformation and dynamic deformation, and the inclination deformation of the tower can be assumed as X (h, t) ═ m + n Δ t) hr+chscos ω Δ t, where Δ t is t-t0, the time increment for measurement time t relative to the measurement cycle start time t 0; x (h, t) is a deformation equation of the tower barrel, namely the horizontal displacement of the height h of the tower barrel at the time t; (m + n.DELTA.t) hrIs a static quasi-static deformation equation of the tower, chscos omega delta t is a dynamic deformation equation of the tower; and m, n, c, omega, r and s are parameters describing deformation of the tower barrel and basically keep stable in a measuring period. T0 may be selected as the time when the acceleration sensor reaches a maximum value over a period of time.
Further, by performing derivation on X (h, t), a relation between the acceleration of the tower and the height of the tower can be obtained, that is, an acceleration equation:
<math>
<mrow>
<mover>
<mi>X</mi>
<mrow>
<mo>·</mo>
<mo>·</mo>
</mrow>
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<mrow>
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<mi>ω</mi>
<mn>2</mn>
</msup>
<mi>c</mi>
<msup>
<mi>h</mi>
<mi>s</mi>
</msup>
<mi>cos</mi>
<mi>ωΔt</mi>
<mo>,</mo>
</mrow>
</math> (Δt=t-t0)。
wherein,
the acceleration of the tower at the measuring time t and height h is indicated.
In addition, because the deformation curve of the tower is a coherent curve, the following equation can be satisfied for the inclination angles at different heights of the tower:
<math>
<mrow>
<mi>tan</mi>
<mi>α</mi>
<mrow>
<mo>(</mo>
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<mi>t</mi>
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<mi>dh</mi>
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<mo>=</mo>
<mrow>
<mo>(</mo>
<mi>m</mi>
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<mi>nΔt</mi>
<mo>)</mo>
</mrow>
<mi>r</mi>
<msup>
<mi>h</mi>
<mrow>
<mi>r</mi>
<mo>-</mo>
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<mi>cos</mi>
<mi>ωΔt</mi>
<mo>,</mo>
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</math> (Δ t-t0), where α is the angle of inclination of the tower at height h.
Thus, if optionally three different times t1, t2, t3 are taken with respect to a measurement cycle starting at time t0, the measured accelerations and tilt angles at the different times are brought into the above equation
And tan alpha (h, t), the deformation quantities m, n, c, omega, r and s in X (h, t) can be determined, and thus the inclined deformation equation X (h, t) of the tower can be obtained. The detailed calculation process is not described herein.
After the tower body deformation is obtained, the tower barrel inclination caused by the opening and closing angle of the flange is considered, and the total deformation X is obtainedtotal(h, t) the following formula can be used:
<math>
<mrow>
<msub>
<mi>X</mi>
<mi>total</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
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<mo>-</mo>
<msub>
<mi>h</mi>
<mn>1</mn>
</msub>
<mo>)</mo>
</mrow>
<mi>tan</mi>
<msub>
<mi>α</mi>
<mi>gap</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
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</mfenced>
<mo>.</mo>
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</math>
wherein H is the total height of the tower, and H1 is the installation height of the acceleration sensor. It should be noted that, actual wind turbine tower section of thick bamboo can constitute by 2 festivals or more than 2 festivals connecting cylinder, the embodiment of the utility model discloses not be restricted to the condition of only 2 festivals connecting cylinder, can be applied to the tower section of thick bamboo that constitutes by more than 2 festivals connecting cylinder through similar derivation, and no longer describe here.
Furthermore, the embodiment of the utility model provides a still provide a wind turbine tower section of thick bamboo, this wind turbine tower section of thick bamboo includes the aforesaid the embodiment of the utility model provides a measuring device, concrete structure can refer to the explanation of above-mentioned figure 1-3 embodiments, no longer gives unnecessary details here.
The embodiment of the utility model provides an among the applicable various types of aerogenerator, as aerogenerator's support basis, in the wind turbine generator system working process, the accessible is implemented and is come to detect tower section of thick bamboo slope deformation condition according to the sensor that sets up on the tower section of thick bamboo, can effectively improve the stability and the reliability of wind turbine generator system operation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.