High-speed shaft torque detection system and wind driven generator
1. A high speed shaft torque detection system, comprising:
a torque detection device configured to convert a torque of the high speed shaft into an electric signal;
an electro-optical conversion device configured to convert the electrical signals into respective pulsed light signals;
a photoelectric conversion device configured to receive the pulsed light signal and convert the pulsed light signal into an electrical signal;
the data acquisition device is configured to acquire and store the electric signal output by the photoelectric conversion device;
and the photovoltaic power supply device is configured to supply power to the torque detection device and the electro-optical conversion device.
2. The high speed shaft torque sensing system of claim 1, wherein said torque sensing device comprises:
a strain gauge;
and the input end of the signal conditioning module is in signal connection with the strain gauge, and the output end of the signal conditioning module is connected with the electric signal input end of the electro-optical conversion device through a shielded cable.
3. The high-speed shaft torque detection system of claim 1, wherein the electro-optic conversion device comprises:
an annular light emitting band;
the electric signal input end of the electric signal conversion module is connected with the output end of the torque detection device, and the electric signal output end of the electric signal conversion module is connected with the annular luminous band and is configured to convert the electric signal into a corresponding high-frequency pulse electric signal to drive the annular luminous band to emit a pulse optical signal.
4. The high-speed shaft torque detection system according to claim 1, wherein the photoelectric conversion device includes:
the photoelectric sensor is used for converting the pulse optical signals into corresponding electric signals;
and the photoelectric conversion module is configured to demodulate the electric signal received by the photoelectric sensor to obtain a corresponding electric signal.
5. The high-speed shaft torque sensing system of claim 1, wherein said photovoltaic power supply comprises:
a flexible photovoltaic panel;
and the input end of the power supply voltage stabilizing module is connected with the flexible photovoltaic panel through a shielded cable, and the output end of the power supply voltage stabilizing module is respectively connected with the torque detection device and the electro-optical conversion device through shielded cables.
6. A wind power generator, comprising:
a high speed shaft;
the high speed shaft torque sensing system of any one of claims 1 to 5, wherein the torque sensing device, the electro-optic conversion device and the photovoltaic power supply device are disposed on a surface of the high speed shaft.
7. The wind power generator according to claim 6, further comprising an annular light shield provided above a light emitting position of the electro-optical conversion device.
8. The wind power generator of claim 7, further comprising an annular light barrier disposed above the photovoltaic panel of the photovoltaic power supply.
9. The wind power generator as claimed in claim 6, wherein the inner surfaces of the annular light shield and the annular light shield are coated with light absorbing layer.
10. The wind generator of claim 9, wherein the high speed shaft surface is coated with a light absorbing layer.
Background
The wind generating set is a device for capturing wind energy and converting the wind energy into electric energy by blades and mainly comprises a tower, a cabin and a wind wheel system. The wind generating set is influenced by the fluctuation of wind in the operation process, the fluctuation of input load can be transmitted to a high-speed shaft of a set generator through a transmission system in a torque fluctuation mode, the torque fluctuation of the high-speed shaft can damage a coupling and the high-speed shaft of the wind generating set, and in order to optimize a control strategy of the wind generating set, the torque of the high-speed shaft under the whole working condition of the wind generating set needs to be measured.
The traditional high-speed shaft torque measurement is generally carried out by additionally arranging a conductive slip ring on a high-speed shaft, the high-speed shaft needs to be secondarily processed by the contact type measurement method, and the long-term measurement cannot be carried out due to the contact abrasion of the conductive slip ring and a carbon brush. The non-contact measurement method mainly adopts grating type, capacitance coupling type and radio data transmission measurement methods. The grating type and capacitance coupling type measurement precision is not as high as the measurement precision of a resistance strain gauge and has higher requirements on the installation precision of test equipment, the cabin environment where a high-speed shaft is located is in a vibration state in the running process of the wind generating set, and the test method is greatly influenced by the vibration of the surrounding environment and cannot perform long-time measurement. The radio data transmission and power supply testing method is easily interfered by a strong electric field when the wind generating set runs, and problems of data packet loss, unstable wireless power supply and the like can occur.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-speed shaft torque detection system and a wind driven generator, and solves the problems that the traditional contact type measurement cannot be carried out for a long time and the non-contact type measurement is greatly influenced by environmental vibration and an electromagnetic field.
The specific technical scheme is as follows:
in a first aspect, a high speed shaft torque detection system is provided, comprising:
a torque detection device configured to convert a torque of the high speed shaft into an electric signal;
an electro-optical conversion device configured to convert the electrical signals into respective pulsed light signals;
a photoelectric conversion device configured to receive the pulsed light signal and convert the pulsed light signal into an electrical signal;
the data acquisition device is configured to acquire and store the electric signal output by the photoelectric conversion device;
and the photovoltaic power supply device is configured to supply power to the torque detection device and the electro-optical conversion device.
With reference to the first aspect, in a first implementable manner of the first aspect, the torque detection device includes:
a strain gauge;
and the input end of the signal conditioning module is in signal connection with the strain gauge, and the output end of the signal conditioning module is connected with the electric signal input end of the electro-optical conversion device through a shielded cable.
With reference to the first aspect, in a second implementable manner of the first aspect, the electro-optical conversion device includes:
an annular light emitting band;
the electric signal input end of the electric signal conversion module is connected with the output end of the torque detection device, and the electric signal output end of the electric signal conversion module is connected with the annular luminous band and is configured to convert the electric signal into a corresponding high-frequency pulse electric signal to drive the annular luminous band to emit a pulse optical signal.
With reference to the first aspect, in a third implementable manner of the first aspect, the photoelectric conversion apparatus includes:
the photoelectric sensor is used for converting the pulse optical signals into corresponding electric signals;
and the photoelectric conversion module is configured to demodulate the electric signal received by the photoelectric sensor to obtain a corresponding electric signal.
With reference to the first aspect, in a fourth implementable manner of the first aspect, the photovoltaic power supply device includes:
a flexible photovoltaic panel;
and the input end of the power supply voltage stabilizing module is connected with the flexible photovoltaic panel through a shielded cable, and the output end of the power supply voltage stabilizing module is respectively connected with the torque detection device and the electro-optical conversion device through shielded cables.
In a second aspect, there is provided a wind power generator comprising:
a high speed shaft;
the high-speed shaft torque detection system according to the first aspect, or any one of the first to fourth realizable manners of the first aspect, wherein the torque detection device, the electro-optical conversion device, and the photovoltaic power supply device are disposed on a surface of the high-speed shaft.
With reference to the second aspect, in a first implementable manner of the second aspect, the electro-optical conversion device further includes an annular light shield that is provided above a light emission position of the electro-optical conversion device.
With reference to the second aspect, in a second implementable manner of the second aspect, the photovoltaic power supply device further includes an annular light barrier, and the annular light barrier is disposed above the photovoltaic power generation panel of the photovoltaic power supply device.
With reference to the second aspect, in a third implementable manner of the second aspect, the inner surfaces of the annular light shield and the annular light shield are coated with the light absorbing layer.
With reference to the second aspect, in a fourth implementable manner of the second aspect, the high-speed shaft surface is coated with a light absorbing layer.
Has the advantages that: by adopting the high-speed shaft torque detection system and the wind driven generator, the non-contact power supply and the non-contact data transmission of the high-speed shaft torque detection system are realized by adopting an optical signal mode, the interference caused by a strong electric field in the power generation state of the wind driven generator set is reduced, the anti-interference capability and the reliability of the test system are improved, and the system and the method can be used for long-time measurement of the high-speed shaft torque of the wind driven generator set and can be applied to other measurements in a complex electromagnetic environment. Only equipment is additionally installed outside the high-speed shaft in the test process, the original structure of the high-speed shaft is not required to be damaged, the construction period is short, and the structure of the high-speed shaft cannot be damaged.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a system diagram of a high speed shaft torque detection system according to an embodiment of the present invention;
fig. 2 is a structural diagram of a high-speed shaft of a wind turbine according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
A system block diagram of a high speed shaft torque sensing system as shown in fig. 1, the sensing system comprising:
a torque detection device configured to convert a torque of the high speed shaft into an electric signal;
an electro-optical conversion device configured to convert the electrical signals into respective pulsed light signals;
a photoelectric conversion device configured to receive the pulsed light signal and convert the pulsed light signal into an electrical signal;
the data acquisition device is configured to acquire and store the electric signal output by the photoelectric conversion device;
and the photovoltaic power supply device is configured to supply power to the torque detection device and the electro-optical conversion device.
Specifically, the torque detection device may be mounted on a surface of the high-speed shaft, and may convert the torque of the high-speed shaft into an electric signal to be output. The electro-optical conversion device can be arranged on the surface of the high-speed shaft, and the signal input end of the electro-optical conversion device can be connected with the electric signal output end of the torque detection device to receive the electric signal output by the torque detection device.
The electro-optical conversion device can perform signal modulation on the received electric signals, generate corresponding pulse optical signals and send the pulse optical signals to the photoelectric conversion device. Photoelectric conversion device can receive the pulse optical signal that photoelectric conversion device sent to convert pulse optical signal to the signal of telecommunication and send for data acquisition device, data acquisition device can gather the signal of telecommunication and the storage that photoelectric conversion device sent, so reach the purpose of non-contact transmission moment of torsion data.
The photovoltaic power supply device can be arranged on the high-speed shaft and can generate electric energy under the illumination condition so as to supply power to the torque detection device and the electro-optical conversion device which are also arranged on the high-speed shaft, so that the aim of non-contact power supply to the torque detection device and the electro-optical conversion device can be fulfilled.
In this embodiment, preferably, the torque detection device includes:
a strain gauge;
and the input end of the signal conditioning module is in signal connection with the strain gauge, and the output end of the signal conditioning module is connected with the electric signal input end of the electro-optical conversion device through a shielded cable.
Specifically, the strain gauge may be attached to the surface of the high-speed shaft, and may be a Y-type strain gauge, which may convert the torque of the high-speed shaft into a resistance change. The signal conditioning module can convert the resistance change signal of the strain gauge into an electric signal and send the electric signal to the electro-optical conversion device.
In this embodiment, it is preferable that the electro-optical conversion device includes:
an annular light emitting band;
the electric signal input end of the electric signal conversion module is connected with the output end of the torque detection device, and the electric signal output end of the electric signal conversion module is connected with the annular luminous band and is configured to convert the electric signal into a corresponding high-frequency pulse electric signal to drive the annular luminous band to emit a pulse optical signal.
Specifically, the electrical-to-optical signal conversion module may modulate the electrical signal sent by the signal conditioning module and output a corresponding high-frequency pulse electrical signal. The annular luminous belt can be sleeved on the high-speed shaft and can be connected with the output end of the electro-optical signal conversion module, and the annular luminous belt can send out corresponding pulse optical signals under the driving of high-frequency pulse electrical signals. The photoelectric conversion device can convert the received pulse optical signals into corresponding electric signals, so that non-contact data transmission is realized.
In this embodiment, it is preferable that the photoelectric conversion apparatus includes:
the photoelectric sensor is used for converting the pulse optical signals into corresponding electric signals;
and the photoelectric conversion module is configured to demodulate the electric signal received by the photoelectric sensor to obtain a corresponding electric signal.
Specifically, the photoelectric sensor may face the annular light-emitting strip device, and may convert a pulse light signal emitted from the annular light-emitting strip into a corresponding electrical signal and send the electrical signal to the photoelectric conversion module. The photoelectric conversion module can demodulate the electric signal sent by the photoelectric sensor to obtain an electric signal about the torque of the high-speed shaft and send the electric signal to the data acquisition device, and the data acquisition device can be an existing data acquisition device and can acquire and store the electric signal of the high-speed shaft.
In order to enhance the anti-interference capability of the system, double-layer shielding cables can be adopted for connection between the signal conditioning module and the strain gauge, between the electro-optical signal conditioning module and the signal conditioning module, between the annular light-emitting strip and the electro-optical signal conversion module and between the photoelectric sensor and the photoelectric conversion module, so that the electromagnetic interference can be reduced by the double-layer shielding cables, and the anti-interference capability of the system is improved.
In this embodiment, preferably, the photovoltaic power supply device includes:
a flexible photovoltaic panel;
and the input end of the power supply voltage stabilizing module is connected with the flexible photovoltaic panel through a shielded cable, and the output end of the power supply voltage stabilizing module is respectively connected with the torque detection device and the electro-optical conversion device through shielded cables.
Specifically, the flexible photovoltaic panel can be sleeved on the high-speed shaft, and an annular photovoltaic panel strip is formed on the surface of the high-speed shaft. The flexible photovoltaic panel can be electrically connected with the input end of the power supply voltage stabilizing module, and can output stable direct current through the power supply voltage stabilizing module under the illumination condition so as to supply power to the torque detection device and the electro-optical conversion device. Therefore, a strong light source can be arranged at the position opposite to the flexible photovoltaic panel, and the flexible photovoltaic panel is continuously irradiated by the strong light source, so that the photovoltaic power supply device continuously supplies power to the torque detection device and the electro-optical conversion device, and the aim of non-contact power supply is fulfilled.
Flexible photovoltaic board, annular light-emitting area can all be the suit at the high-speed axle, and power voltage stabilizing module, electro-optical signal conversion module, foil gage and signal conditioning module can all be the adhesion at the high-speed axle, so only need carry out the equipment to the high-speed axle outside in the test process and install additional, need not to destroy the original structure of high-speed axle, and construction period is short, can not cause the high-speed axle structural damage.
As shown in fig. 2, the structure of the high speed shaft of the wind power generator includes:
a high speed shaft;
in the high-speed shaft torque detection system, the torque detection device, the electro-optical conversion device and the photovoltaic power supply device are all arranged on the surface of the high-speed shaft.
Specifically, the torque detection device may be mounted on a surface of the high-speed shaft, and may convert the torque of the high-speed shaft into an electric signal to be output. The electro-optical conversion device can be arranged on the surface of the high-speed shaft, and the signal input end of the electro-optical conversion device can be connected with the electric signal output end of the torque detection device to receive the electric signal output by the torque detection device.
The electro-optical conversion device can perform signal modulation on the received electric signals, generate corresponding pulse optical signals and send the pulse optical signals to the photoelectric conversion device. Photoelectric conversion device can receive the pulse optical signal that photoelectric conversion device sent to convert pulse optical signal to the signal of telecommunication and send for data acquisition device, data acquisition device can gather the signal of telecommunication and the storage that photoelectric conversion device sent, so reach the purpose of non-contact transmission moment of torsion data.
The photovoltaic power supply device can be arranged on the high-speed shaft and can generate electric energy under the illumination condition so as to supply power to the torque detection device and the electro-optical conversion device which are also arranged on the high-speed shaft, so that the aim of non-contact power supply to the torque detection device and the electro-optical conversion device can be fulfilled.
In this embodiment, it is preferable that an annular light shielding cover be further included, the annular light shielding cover being provided above a light emission position of the electro-optical conversion device.
Specifically, the annular light shield can be covered above the annular light-emitting strip, and the photoelectric sensor is arranged on the inner wall of the annular light shield, so that the influence of an external light source and scattered light generated by the annular light-emitting strip on the test can be reduced.
In this embodiment, it is preferable that the photovoltaic power supply device further includes an annular light blocking cover, and the annular light blocking cover is disposed above the photovoltaic power generation panel of the photovoltaic power supply device.
Particularly, an annular light blocking cover can be arranged around the flexible photovoltaic panel above an annular area covered by the flexible photovoltaic panel, the annular light blocking cover can be covered above the flexible photovoltaic panel, and the strong light source can be arranged on the inner wall of the annular light blocking cover, so that most of scattered light generated by the strong light source can be blocked, and the influence on optical signal transmission is reduced.
In this embodiment, preferably, the inner surfaces of the annular light shield and the annular light shield are coated with light absorbing layers. The light absorption layer can absorb light, further reduce external light source, and the influence on the test caused by diffuse reflection generated on the surface of the high-speed shaft due to light irradiation.
In an embodiment, preferably, the high speed shaft surface is coated with a light absorbing layer. The light absorption layer on the surface of the high-speed shaft can absorb light rays irradiated on the surface of the high-speed shaft by an external light source, a strong light source and an annular luminous band, so that the influence of diffuse reflection generated on the surface of the high-speed shaft by the light rays on testing is further reduced.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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, and they should be construed as being included in the following claims and description.
