CN103595192B - High-rating generator stator and rotor flow wind speed measuring device - Google Patents
High-rating generator stator and rotor flow wind speed measuring device Download PDFInfo
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- CN103595192B CN103595192B CN201310551634.1A CN201310551634A CN103595192B CN 103595192 B CN103595192 B CN 103595192B CN 201310551634 A CN201310551634 A CN 201310551634A CN 103595192 B CN103595192 B CN 103595192B
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Abstract
High-rating generator stator and rotor flow wind speed measuring device, belongs to electric field.The invention solves due to by complex electromagnetic fields in generator spatial limitation and motor on the impact of measuring, in high-rating generator stator and rotor and air gap, flow wind speed is difficult to the problems such as test in real electrical machinery.It is wooden stator core and stator winding that the present invention proposes to have with the rotor solid of rotor of steam turbo generator identical minor groove ventilation ducts and Radial ventilation duct and rotor, stator side; Extension type measuring wind transducer is installed at stator yoke back, stator and rotor air gap and tube-axial fan wind deflector place respectively, can monitor the wind speed in device; By the output frequency of two frequency converters in the whole measurement mechanism of adjusted in concert, reach the object regulating motor speed.Device can measure flow and flow velocity size in Generator Stator, rotor and air gap accurately, avoids high experimental expenses, has and measures accurately and be easy to the advantages such as realization.
Description
Technical field
The present invention relates to high-rating generator stator and rotor flow wind speed measuring device, belong to electric field.
Background technology
At present, project planner is concerned about uninterrupted in the Generator Stator of more than hundred megawatts, rotor and air gap very much, and they respectively account for the ratio of total flow, and the size of wind speed in stator, rotor and air gap.Due to by complex electromagnetic fields in generator spatial limitation and motor on the impact of measuring, in high-rating generator stator and rotor and air gap, flow wind speed is difficult to test out in real electrical machinery.
Summary of the invention
In order to determine that wind speed in electric motor internal stator, rotor and air gap and air force and they account for the ratio of total blast volume exactly, a kind of new measurement mechanism is proposed.
The technical scheme that the present invention proposes is:
High-rating generator stator and rotor flow wind speed measuring device, main body is the turbo generator stator and rotor analogue means of emulation.Rotor axis 19 two ends of analogue means are respectively connected with a same power electric motor 9 by ring flange.Axle 19 two ends are also respectively provided with a tube-axial fan 1 in the rotor.This measurement mechanism is provided with altogether the transducer of four groups of measuring wind: extension type is installed at stator yoke back and measures stator yoke back air velocity transducer 5; Extension type is installed between air gap 15 between stator and rotor and measures rotor air velocity transducer 6; At stator faces air gap, place installs and measures air gap air velocity transducer 16; Fan air velocity transducer 17 is installed and measured before tube-axial fan 1.
The beneficial effect that the present invention is compared to the prior art had:
Invention proposes a kind of high-rating generator stator and rotor flow wind speed measuring device, and device can measure flow and flow velocity size in Generator Stator, rotor and air gap accurately.Utilize two Synchronization Control with power electric motor, can operating condition different from generator time stator and rotor and air gap in the size of flow and wind speed measure.Because two motors is the motor of Synchronization Control, during operation, output speed is stablized, and can improve the reliability of device; Adopt this device can avoid high experimental expenses, have and to measure in high-rating generator flow and flow velocity accurately and be easy to the advantages such as realization.
Accompanying drawing explanation
Fig. 1 is the high-rating generator stator and rotor flow wind speed measuring device schematic diagram of air-gap-free deep bead;
Fig. 2 is the high-rating generator stator and rotor flow wind speed measuring device schematic diagram having air gap deep bead;
Fig. 3 is the A-A ' cross sectional representation of Fig. 1.
In figure, 1 is tube-axial fan, 2 is rotor, 3 is Stator End Winding, 4 is linear stator section winding, 5 is extension type measurement stator yoke back air velocity transducer, 6 is extension type measurement rotor air velocity transducer, 7 is connecting rod, 8 is stator core, 9 is motor, 10 is frequency converter, 11 is total frequency converter, 12 is ventilation from sub-slot ditch, 13 is rotor radial ventilation ducts, 14 is stator ventilation ducts, 15 is fixed, air gap between rotor, 16 for measuring air gap air velocity transducer, 17 for measuring fan air velocity transducer, 18 is fan wind deflector, 19 is rotor axis, 20 is air gap deep bead, 21 is rotor.
Embodiment
Below in conjunction with Fig. 1-3, by specific embodiment, the invention will be further described;
See Fig. 1 and Fig. 3, high-rating generator stator and rotor flow wind speed measuring device of the present invention, main body is the turbo generator stator and rotor analogue means of emulation.The solid of wooden structures made by its rotor 2 with secondary groove, and the solid of this wooden structures has the ventilation from sub-slot ditch 12 identical with rotor of steam turbo generator, rotor radial ventilation ducts 13 and rotor 21, embeds copper winding in rotor 21.
Stator side adopts the principle of similarity with stator of steam turbine generator, is provided with Stator End Winding 3 and linear stator section winding 4.These stator winding are non-copper windings, are made up of solid wood outer wrapping insulating barrier.Stator core 8 is also be made up of wooden structures, has corresponding stator ventilation ducts 14 vertically.Connecting rod 7 this stator shaft orientation is equipped with, by the bolt of termination, ventilation ducts 14 width is regulated, when can measure stator ventilation ducts 14 different in width, uninterrupted in stator, rotor and air gap, they respectively account for the ratio of total flow, and the size of wind speed in stator, rotor and air gap.
Rotor axis 19 two ends of analogue means are respectively connected with a same power electric motor 9 by ring flange, and axle 19 two ends are also respectively provided with a tube-axial fan 1 in the rotor; Regulate and control respectively by two frequency converters 10.Two frequency converters 10 are again by total frequency converter 11 synchronization modulation.By total frequency converter 11 synchronization modulation, rotor 2 is rotated, and make two tube-axial fans 1 produce same air quantity.By the output frequency of adjusted in concert two frequency converters 10, regulate rotor 2 rotating speed, make rotor speed reach 1500r/min to be used for simulating Half Speed turbo generator operating state, or rotor speed finally can be made to reach 3000r/min, be used for simulating turbo generator operating state at full speed.
Tube-axial fan 1 is equipped with fan wind deflector 18, concentrates the axle pericentral area blowing to stator and rotor to make wind.
This measurement mechanism is provided with altogether the transducer of four groups of measuring wind: extension type is installed at stator yoke back and measures stator yoke back air velocity transducer 5; Extension type is installed between air gap 15 between stator and rotor and measures rotor air velocity transducer 6; At stator faces air gap, place installs and measures air gap air velocity transducer 16; Fan air velocity transducer 17 is installed and measured before tube-axial fan 1.
In Fig. 2, install air gap deep bead 20 in the air gap port of the stator and rotor of analogue means, air gap deep bead 20 makes taper type.Object stops that cooling air is back to rotor ventilation from sub-slot ditch 12, affects the distribution of actual air volume.For this reason, make taper type air gap deep bead 20, make cooling air enter stator ventilation ducts 14 by rotor ventilation from sub-slot ditch 12.
Air quantity wind measurement method of the present invention is:
Have very large space above Stator End Winding 3, the part wind allowing tube-axial fan 1 produce is discharged in air.
(1), when being equipped with air gap deep bead 20, measure from stator air quantity out:
What extension type measurement stator yoke back air velocity transducer 5 was measured enters stator each ventilation ducts wind speed V from rotor-side
1, V
2, V
3v
n, be multiplied by the discharge area S of each ventilation ducts of stator
1, S
2, S
3s
n, obtain the air quantity Q of each ventilation ducts of stator
1, Q
2, Q
3q
n, from stator air quantity Q out when just can define air gap deep bead 20 after summation
111.
Q
111=Q
1+Q
2+Q
3…+Q
n
=V
1×S
1+V
2×S
2+V
3×S
3…+V
n×S
n
Q in formula
111from stator air quantity out during for there being an air gap deep bead, V
nbe the wind speed of the n-th stator ventilation ducts, S
nit is the discharge area of the n-th stator ventilation ducts.
(2), when removing air gap deep bead 20, measure and enter air gap 15 air quantity Q between stator and rotor
222:
Measurement air gap air velocity transducer 16 is stretched at stator faces air gap place, measures wind speed herein.In order to ensure to measure the accuracy of the air quantity entering air gap 15 between stator and rotor, measuring equally at stator yoke back and entering stator each ventilation ducts wind speed V
13, V
23, V
33v
n3, be multiplied by the discharge area S of each ventilation ducts of stator
1, S
2, S
3s
nnamely the air quantity Q of each ventilation ducts of stator can be obtained
13, Q
23, Q
33q
n3, when just can determine air-gap-free deep bead after summation from stator air quantity be out Q
333.With during air-gap-free deep bead 20 from stator air quantity Q out
333from stator air quantity Q out when deducting air gap deep bead 20
111just can obtain the air quantity Q entering air gap
222, divided by the air gap 15 inlet area S of 2 times
12, just can obtain the wind speed V entering air gap 15
222.
Q
333=Q
13+Q
23+Q
33…+Q
n3
=V
13×S
1+V
23×S
2+V
33×S
3…+V
n3×S
n
Q
222=Q
333-Q
111
V
222=Q
222/S
12/2
Q in formula
333for during air-gap-free deep bead from stator air quantity out.V
n3it is the wind speed of the n-th stator ventilation ducts.S
nit is the discharge area of the n-th stator ventilation ducts.Q
222for entering air gap air quantity, S
12for air gap inlet area, V
222for entering the wind speed of air gap 15.
(3), when removing air gap deep bead 20, measure from rotor air quantity Q out
444:
Extension type is installed at stator and rotor air gap place and measures rotor air velocity transducer 6, notice that extension type measures rotor air velocity transducer 6 close to outlet more, it is more accurate to measure from rotor radial ventilation ducts 13 wind speed out, but also should maintain a certain distance with the rotor 2 with secondary groove, avoid the rotor 2 with secondary groove to rotate and encounter extension type measurement rotor air velocity transducer 6.From each rotor radial ventilation ducts 13 wind speed V out
14, V
24, V
34v
n4, be multiplied by the area S in rotor ventilation from sub-slot hole
14, S
24, S
34s
n4namely can obtain from the air quantity Q out of the rotor 2 with secondary groove
14, Q
24, Q
34q
n4, just can determine after summation from rotor air quantity be out Q
444.
Q
444=Q
14+Q
24+Q
34…+Q
n4
=V
14×S
14+V
24×S
24+V
34×S
34…+V
n4×S
n4
Q in formula
444for during air-gap-free deep bead 20 from rotor air quantity out.V
n4it is the wind speed in the n-th rotor ventilation from sub-slot hole.S
n4the area in the n-th rotor ventilation from sub-slot hole.
(4) the total blast volume Q of tube-axial fan 1 is measured
666:
Can measure from tube-axial fan 1 wind speed V out by measuring fan air velocity transducer 17
15, be multiplied by fan wind deflector 18 discharge area S
15, just can determine the air quantity Q of a tube-axial fan 1
555, because device internal fan is symmetrical, being multiplied by 2 just can total blast volume Q in determining device
666.
Q
555=V
15×S
15
Q
666=2×Q
15
Q in formula
555it is the flow of a fan.Q
666for the total blast volume in measurement mechanism.
Based on above-mentioned result of calculation, the air quantity Q through stator end also can be determined
777.
Q
777=Q
666-Q
333。
Q in formula
777for the flow through stator end.Q
666for the total blast volume in measurement mechanism.Q
333for during air-gap-free deep bead from stator air quantity out.
Claims (6)
1. high-rating generator stator and rotor flow wind speed measuring device, main body is the turbo generator stator and rotor analogue means of emulation, it is characterized in that: rotor axis (19) two ends of analogue means are respectively connected with a same power electric motor (9) by ring flange; Axle (19) two ends are also respectively provided with a tube-axial fan (1) in the rotor; This measurement mechanism is provided with altogether the transducer of four groups of measuring wind: extension type is installed at stator yoke back and measures stator yoke back air velocity transducer (5); Extension type is installed between air gap (15) between stator and rotor and measures rotor air velocity transducer (6); Air gap air velocity transducer (16) is installed and measured at stator faces air gap place; Install and measure fan air velocity transducer (17) tube-axial fan (1) is front;
Stator shaft orientation is equipped with connecting rod (7), by the bolt of connecting rod (7) termination, ventilation ducts (14) width is regulated.
2. measurement mechanism according to claim 1, it is characterized in that: solid made by the rotor (2) with secondary groove, this solid has ventilation from sub-slot ditch (12), rotor radial ventilation ducts (13) and rotor (21), in rotor (21), embed copper winding.
3. measurement mechanism according to claim 1, is characterized in that: stator side is provided with Stator End Winding (3) and linear stator section winding (4); Stator core (8) has corresponding stator ventilation ducts (14) vertically.
4. measurement mechanism according to claim 1, is characterized in that: the motor (9) at rotor axis (19) two ends and tube-axial fan (1) regulate and control respectively by two frequency converters (10); Two frequency converters (10) are again by total frequency converter (11) synchronization modulation; By total frequency converter (11) synchronization modulation, rotor (2) is rotated, and make two tube-axial fans (1) produce same air quantity.
5. measurement mechanism according to claim 1, is characterized in that: on tube-axial fan (1), be equipped with fan wind deflector (18), concentrates the axle pericentral area blowing to stator and rotor to make wind.
6. measurement mechanism according to claim 1, is characterized in that: install air gap deep bead (20) in the air gap port of stator and rotor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310551634.1A CN103595192B (en) | 2013-11-08 | 2013-11-08 | High-rating generator stator and rotor flow wind speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310551634.1A CN103595192B (en) | 2013-11-08 | 2013-11-08 | High-rating generator stator and rotor flow wind speed measuring device |
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| CN103595192A CN103595192A (en) | 2014-02-19 |
| CN103595192B true CN103595192B (en) | 2016-03-30 |
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| CN105509799A (en) * | 2015-11-27 | 2016-04-20 | 哈尔滨电机厂有限责任公司 | Large hydro generator rotor parameter ultra-wide band wireless measuring device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201336096Y (en) * | 2008-12-16 | 2009-10-28 | 哈尔滨电机厂有限责任公司 | Ventilation model device for full air-cooled hydraulic generator |
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| US8729722B2 (en) * | 2008-12-23 | 2014-05-20 | Xemc Darwind B.V. | Wind turbine and method for monitoring the gap length between a rotor and a stator of the wind turbine generator |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201336096Y (en) * | 2008-12-16 | 2009-10-28 | 哈尔滨电机厂有限责任公司 | Ventilation model device for full air-cooled hydraulic generator |
Non-Patent Citations (3)
| Title |
|---|
| "巨型全空冷水轮发电机通风模拟试验及计算研究";安志华;《中国优秀博硕士学位论文全文数据库（硕士）工程科技II辑》;20051231;第9-26页 * |
| "抽水蓄能发电电动机通风模型试验研究与分析";杨越等;《大电机技术》;20071231;第5-8页 * |
| "白山抽水蓄能电机通风试验研究与分析";韩荣娜等;《防爆电机》;20081231;第43卷(第6期);第48-51页 * |
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