CN102279279B - Rotating speed measuring apparatus of blower fan overspeed - Google Patents
Rotating speed measuring apparatus of blower fan overspeed Download PDFInfo
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- CN102279279B CN102279279B CN 201110179870 CN201110179870A CN102279279B CN 102279279 B CN102279279 B CN 102279279B CN 201110179870 CN201110179870 CN 201110179870 CN 201110179870 A CN201110179870 A CN 201110179870A CN 102279279 B CN102279279 B CN 102279279B
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- communication slip
- blower fan
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Abstract
The invention provides a rotating speed measuring apparatus of blower fan overspeed. A blower fan gear case low speed shaft is sleeved by a communication slip ring. The rotating speed measuring apparatus is corresponding to arrangement of the communication slip ring, and measures a relative rotating speed between a stationary side and a rotational side of the communication slip ring. A signal output terminal of the rotating speed measuring apparatus is directly connected with a signal input terminal of a propeller change system through a socket connector at a propeller change side of the communication slip ring. According to the invention, a safety problem when the blower fan is in an overspeed state is solved; a communication process is short, operation time is short, signal attenuation and error are small, and control efficiency is substantially raised; a signal output terminal of the communication slip ring socket connector is used for transmission, influences of communication slip ring internal interference and extraneous condition are avoided, communication is accurate and reliable, and safety running of the blower fan propeller change system can be effectively protected.
Description
Technical field
The present invention relates to the protective device of wind generating set pitch control system, specifically a kind of detection of gear case slow-speed shaft rotating speed, and directly give the measurement mechanism of pitch-controlled system with this tach signal.
Background technology
The energy is a problem of current whole mankind's facing.Traditional energy slowly reduces, and can not satisfy people's demand, more seriously, such as thermal power generation, oil, rock gas etc., environmental disruption is very large, therefore, develops new clean energy resource and seems quite eager.Wherein, wind-power electricity generation is following a kind of clean energy resource, more and more obtains people's attention.
The communication slip ring that is used for wind-power electricity generation, as the vitals that electrical source of power, transmission of control signals and communication function are provided for pitch-controlled system, it is installed in the gear case low speed rotating shaft with the synchronized coaxial rotation of wheel hub.After the blower fan hypervelocity, the communication slip ring may lose efficacy as the carrier of signal transmission, so that pitch-controlled system can not normally receive the overspeed signal rotary speed information that master control is sent, the action of can not in time making a response is so that the overspeed operation of blower fan can not in time be contained.Therefore, there is very large potential safety hazard in blower fan, how when blower fan exceeds the speed limit, protect pitch-controlled system reliably, just seems quite important.
General solution is, as shown in Figure 1, by installing scrambler additional at communication slip ring afterbody, scrambler and communication slip ring bearing synchronous rotary, records the revolution of blower fan; The blower fan revolution signal that scrambler records is delivered to master control system, master control system to this revolution signal process, computing, obtain the rotation speed of fan in the unit interval---be the tach signal of blower fan; Master control system compares the blower fan maximum speed value of this tach signal and program setting, if be higher than setting value, then represents the blower fan hypervelocity; the master control system control module sends the signal of putting away the oars fast; pass to pitch-controlled system by the communication slip ring, excite pitch-controlled system topworks to put away the oars fast, the protection blower fan.This mode can solve the safety problem of blower fan under overspeed condition in the ordinary course of things to a certain extent.But, the components and parts of process process are more because this tests the speed, communication process is long, tach signal will could finally be sent into pitch-controlled system, send the operation signal of topworks through multiple conversions, has certain time delay and multiple conversions and can produce decay and error to the signal transmission; And, because domestic wind generating technology is still immature, the communication function of communication slip ring slideway and unreliable, as can be subject to internal unit interference and the impact of external condition etc. make its signal transmission inaccurate, even under overspeed situation, the communication slip ring lost efficacy, and caused signal to transmit.So, still there is very large safety problem in blower fan.
Summary of the invention
Rotation-speed measuring device when the object of the present invention is to provide a kind of blower fan hypervelocity makes that pitch-controlled system improves, reliably overspeed protection.
The technical solution adopted in the present invention is:
Rotation-speed measuring device during a kind of blower fan hypervelocity, engage sleeves is connected to the communication slip ring on the gear case of blower slow-speed shaft, the corresponding communication slip ring of described rotation-speed measuring device arranges, measures the relative rotation speed between communication slip ring Stationary side and the rotating side, and the signal output part of this rotation-speed measuring device becomes the connector of oar side, directly connects the signal input part of pitch-controlled system by the communication slip ring.
Described rotation-speed measuring device comprises tachogenerator and the code-disc that tests the speed, tachogenerator is arranged on the side face of communication slip ring rotating side, rotates synchronously with communication slip ring rotating side, and the code-disc that tests the speed is fixed with respect to static, the corresponding tachogenerator of communication slip ring Stationary side position.
End face or gear-box end that the described code-disc that tests the speed is arranged on communication slip ring Stationary side cover.
The described code-disc that tests the speed is a mechanical code-disc, be provided with symmetrically one on the former of this machinery code-disc and enclose the hole of testing the speed, tachogenerator is an inductance approach switch, the correspondence hole site of testing the speed arranges, by measuring unit test the speed in the time hole displacement, obtain the relative rotation speed between communication slip ring Stationary side and the rotating side.
The probe of described tachogenerator and the hole of testing the speed are concentric.
The beneficial effect that the present invention produces is:
Rotation-speed measuring device during blower fan hypervelocity of the present invention, adopt that independently measuring equipment records the tach signal of gear case of blower slow-speed shaft, the signaling interface by the communication slip ring directly is sent to pitch-controlled system with this tach signal again, and do not use the slideway transmission of communication slip ring.This mode has solved the safety problem of blower fan under overspeed condition, blower fan directly utilizes tach signal, useful effect to implement the overspeed protection of blower fan to pitch-controlled system, and this communication process is short, operation time is short, signal attenuation and error are less so that control efficiency improves greatly; And adopt the signal output part of communication slip ring connector to transmit, and there are not the interference of communication slip ring inside and the impact of external condition, communication can be protected the safe handling of the pitch-controlled system of blower fan accurately and reliably effectively.
Description of drawings
Fig. 1 is the schematic flow sheet of prior art blower fan overspeed protection tach signal transmission;
Fig. 2 is blower fan overspeed signal transfer process synoptic diagram of the present invention
Fig. 3 is that the mounting structure master of rotation-speed measuring device of the present invention looks synoptic diagram;
Fig. 4 is the mounting structure schematic side view of rotation-speed measuring device of the present invention;
Fig. 5 is the present invention's code-disc structural drawing that tests the speed;
Number in the figure represents: the 1-code-disc that tests the speed, and the 2-tachogenerator, the 3-mounting bracket, the 4-cable-through hole, 5-communication slip ring rotating side, 6-communication slip ring Stationary side, 7-communication slip ring master control side joint plug-in unit, 8-communication slip ring become oar side joint plug-in unit, the 9-hole of testing the speed.
Embodiment
As shown in Figure 2; rotation-speed measuring device when the invention discloses a kind of blower fan hypervelocity; the wind speed round signal that this rotation-speed measuring device obtains independent measurement, directly be transferred to the protection loop of pitch-controlled system, avoid tach signal through sound converter section cover---the transmission of communication slip ring.Blower fan directly utilizes the wind speed round signal, and useful effect is implemented the overspeed protection to blower fan to pitch-controlled system.
The structural representation that the communication slip ring behind the rotation-speed measuring device is installed such as Fig. 3～shown in Figure 4, this communication slip ring is arranged on the slow-speed shaft that fan engine room inside, engage sleeves are connected on gear case of blower, the rotary state of the corresponding wind wheel of its rotary state, being communication slip ring rotating side 5 is equivalent to the rotary state of the slow-speed shaft of gear case of blower with respect to the rotary state of communication slip ring Stationary side 6, and namely the rotating speed of communication slip ring rotating side 5 equals rotation speed of fan.
Rotation-speed measuring device is made of two parts arranging by the communication slip ring, is code-disc 1 and the tachogenerator 2 of testing the speed.Tachogenerator 2 is inductance approach switchs, is mounted on the side face of communication slip ring rotating side 5 by mounting bracket 3, rotates synchronously with communication slip ring rotating side 5.The code-disc 1 that tests the speed is 6 static with respect to communication slip ring Stationary side, do not have the motion state of rotation, and the position of corresponding tachogenerator 2 is fixed.As shown in Figure 5, the code-disc 1 that tests the speed is a mechanical code-disc, is provided with symmetrically a circle hole 9 of testing the speed on the former of this machinery code-disc, and the code-disc 1 that tests the speed is fixedly mounted on the end face of communication slip ring Stationary side 6 or gear-box end covers.For the communication slip ring that supporting plate structure is arranged, the back up pad of test the speed code-disc 1 and communication slip ring is made of one the formula structure; For the communication slip ring that does not have supporting plate structure, the code-disc 1 that tests the speed can be made independently structure, is fixedly mounted on the slip ring body.
In this embodiment, the code-disc 1 that tests the speed is fixedly mounted on the end face of communication slip ring Stationary side 6, the end face of the corresponding communication slip ring of its former outside surface rotating side 5, and evenly open 30 holes 9 of testing the speed around this code-disc 1 that tests the speed, the distance of all 9 corresponding slip ring axis, hole of testing the speed is identical.The test the speed position in hole 9 of tachogenerator 2 correspondences arranges, and the hole 9 of testing the speed on the probe of this tachogenerator 2 and the code-disc 1 that tests the speed arranges with one heart.When tachogenerator 2 is followed 5 rotation of communication slip ring rotating side, by read through the code-disc 1 that tests the speed on the hole 9 of testing the speed quantity, calculate the number of turns of communication slip ring rotating side 5 actual rotation, so, calculate the rotation number of turns of communication slip ring rotating side 5 in the unit interval, i.e. the rotating speed of blower fan.Thus, tachogenerator 2 records the rotation speed of fan signal.
The end of tachogenerator 2 is connected with cable, the cable-through hole 4 that arranges on the outer peripheral face housing of this cable by communication slip ring rotating side 5, and the inside of entry communication slip ring, thus the connecting communication slip ring becomes the data communication interface of oar side joint plug-in unit 8.The corresponding wind wheel hub of this data communication interface is interior, the signal input part of pitch-controlled system control element, so, tach signal is directly fed back to pitch-controlled system, avoids affecting because of the signal transmission issues appearance of communication slip ring self security of blower fan.
The control module of pitch-controlled system receives the rotation speed of fan signal that tachogenerator 2 records, with itself and default hypervelocity rotating speed critical value compare, computing, topworks sends operation signal to pitch-controlled system.If blower fan hypervelocity, then the pitch-controlled system control module sends the signal of putting away the oars fast, excites pitch-controlled system topworks quick shutdown.
Claims (4)
1. the rotation-speed measuring device a when blower fan exceeds the speed limit, engage sleeves is connected to the communication slip ring on the gear case of blower slow-speed shaft, it is characterized in that: the corresponding communication slip ring of described rotation-speed measuring device arranges, measures the relative rotation speed between communication slip ring Stationary side and the rotating side, and the signal output part of this rotation-speed measuring device becomes the connector of oar side, directly connects the signal input part of pitch-controlled system by the communication slip ring;
Described rotation-speed measuring device comprises tachogenerator and the code-disc that tests the speed, tachogenerator is arranged on the side face of communication slip ring rotating side, rotates synchronously with communication slip ring rotating side, and the code-disc that tests the speed is fixed with respect to static, the corresponding tachogenerator of communication slip ring Stationary side position.
2. the rotation-speed measuring device when blower fan according to claim 1 exceeds the speed limit, it is characterized in that: end face or gear-box end that the described code-disc that tests the speed is arranged on communication slip ring Stationary side cover.
3. the rotation-speed measuring device when blower fan according to claim 1 exceeds the speed limit, it is characterized in that: the described code-disc that tests the speed is a mechanical code-disc, be provided with symmetrically one on the former of this machinery code-disc and enclose the hole of testing the speed, tachogenerator is an inductance approach switch, the correspondence hole site of testing the speed arranges, by measuring unit test the speed in the time hole displacement, obtain the relative rotation speed between communication slip ring Stationary side and the rotating side.
4. the rotation-speed measuring device when blower fan according to claim 3 exceeds the speed limit, it is characterized in that: the probe of described tachogenerator and the hole of testing the speed are concentric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179870 CN102279279B (en) | 2011-06-30 | 2011-06-30 | Rotating speed measuring apparatus of blower fan overspeed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179870 CN102279279B (en) | 2011-06-30 | 2011-06-30 | Rotating speed measuring apparatus of blower fan overspeed |
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| Publication Number | Publication Date |
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| CN102279279A CN102279279A (en) | 2011-12-14 |
| CN102279279B true CN102279279B (en) | 2013-03-20 |
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| CN 201110179870 Active CN102279279B (en) | 2011-06-30 | 2011-06-30 | Rotating speed measuring apparatus of blower fan overspeed |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106532Y (en) * | 2007-08-21 | 2008-08-27 | 浙江运达风力发电工程有限公司 | Transmission system of wind generator set |
| CN101504421A (en) * | 2008-02-05 | 2009-08-12 | 诺德克斯能源有限公司 | Device for monitoring the rotational speed of a wind turbine |
| CN201497751U (en) * | 2009-08-11 | 2010-06-02 | 湘电风能有限公司 | Wind measurement device during operation of wind-driven generator group |
| CN101794983A (en) * | 2010-02-05 | 2010-08-04 | 浙江风光机电科技有限公司 | Safety automatic braking device of wind driven generator |
| CN201705556U (en) * | 2010-06-22 | 2011-01-12 | 沈阳瑞祥风能设备有限公司 | Intelligently controlled wind driven generator braking system |
-
2011
- 2011-06-30 CN CN 201110179870 patent/CN102279279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106532Y (en) * | 2007-08-21 | 2008-08-27 | 浙江运达风力发电工程有限公司 | Transmission system of wind generator set |
| CN101504421A (en) * | 2008-02-05 | 2009-08-12 | 诺德克斯能源有限公司 | Device for monitoring the rotational speed of a wind turbine |
| CN201497751U (en) * | 2009-08-11 | 2010-06-02 | 湘电风能有限公司 | Wind measurement device during operation of wind-driven generator group |
| CN101794983A (en) * | 2010-02-05 | 2010-08-04 | 浙江风光机电科技有限公司 | Safety automatic braking device of wind driven generator |
| CN201705556U (en) * | 2010-06-22 | 2011-01-12 | 沈阳瑞祥风能设备有限公司 | Intelligently controlled wind driven generator braking system |
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| CN102279279A (en) | 2011-12-14 |
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Effective date of registration: 20160420 Address after: 618000 Sichuan Province, Deyang city Huashan road two No. 2 Patentee after: DONGFANG ELECTRIC WIND POWER CO., LTD. Address before: 618000 Jiangxi hi tech Industrial Park, Sichuan, Jinsha Road, No. 666, No. Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |
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Address after: 618000 2 Huashan South Road, Deyang, Sichuan, 2 Patentee after: Dongfang Electric Wind Power Co.,Ltd. Address before: 618000 2 Huashan South Road, Deyang, Sichuan, 2 Patentee before: DONGFANG ELECTRIC WIND POWER Co.,Ltd. |