CN103595192A - Device for measuring flow and wind velocity of stator and rotor of large power generator - Google Patents
Device for measuring flow and wind velocity of stator and rotor of large power generator Download PDFInfo
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- CN103595192A CN103595192A CN201310551634.1A CN201310551634A CN103595192A CN 103595192 A CN103595192 A CN 103595192A CN 201310551634 A CN201310551634 A CN 201310551634A CN 103595192 A CN103595192 A CN 103595192A
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Abstract
The invention discloses a device for measuring the flow and wind velocity of a stator and a rotor of a large power generator, and belongs to the electrical field. The problem that due to limitation of space of the power generator and influences of the complex electromagnetic field in a motor on measurement, the flow and wind velocity of the stator and the rotor of the large power generator and the flow and wind velocity in an air gap between the stator and the rotor of the large power generator are very difficult to measure in an actual motor and other problems are solved through the device. A rotor solid body provided with an auxiliary groove ventilating duct, a radial ventilating duct and a rotor groove is arranged, the auxiliary groove ventilating duct, the radial ventilating duct and the rotor groove are the same as those of a rotor of a turbonator, and a wooden stator core and stator windings are arranged on a stator side. Forward extending type wind velocity measuring sensors are arranged at the back portion of a stator yoke, in the air gap between the stator and the rotor and in the position of an air deflector of a tube-axial fan respectively, and the wind velocity in the device can be monitored. By synchronously adjusting output frequencies of two frequency converters in the whole measuring device, the aim of adjusting the rotating speed of an electric motor is achieved. The flow and flow velocity of the stator and the rotor of the large power generator and the flow and flow velocity in the air gap between the stator and the rotor of the large power generator can be accurately measured through the device, high experimental expenses are prevented, and the device has the advantages of being accurate in measurement, easy to obtain and the like.
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 Generator Stator, rotor and air gaps more than hundred megawatts very much, and they respectively account for the ratio of total flow, and the size of the interior wind speed of stator, rotor and air gap.Owing to being subject to, in generator spatial limitation and motor, complex electromagnetic fields is on the impact of measuring, and 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 exactly wind speed in electric motor internal stator, rotor and air gap and air force and they account for the ratio of total blast volume, propose a kind of new measurement mechanism.
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.At rotor axis 19 two ends, a tube-axial fan 1 is also respectively installed.The transducer of four groups of measuring wind is installed altogether: extension type is installed at stator yoke back and is measured stator yoke back air velocity transducer 5 on this measurement mechanism; Extension type is installed between air gap between stator and rotor 15 and is measured rotor air velocity transducer 6; At stator faces air gap, place installs and measures air gap air velocity transducer 16; Before tube-axial fan 1, install and measure fan air velocity transducer 17.
The beneficial effect that compared to the prior art the present invention had:
Invention proposes a kind of high-rating generator stator and rotor flow wind speed measuring device, and device can be measured flow and flow velocity size in Generator Stator, rotor and air gap accurately.Utilization is to two Synchronization Control with power electric motor, and in the time of can be to the different operating condition of generator, in stator and rotor and air gap, the size of flow and wind speed be measured.Because two motors is the motor of Synchronization Control, during operation, output speed is stable, can improve the reliability of device; Adopt this device can avoid high experimental expenses, there is the interior flow of the high-rating generator of measurement 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 without air gap deep bead;
Fig. 2 is the high-rating generator stator and rotor flow wind speed measuring device schematic diagram that has 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 for 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;
Referring to 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.It makes the solid of wooden structures with the rotor 2 of secondary groove, 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, solid wood outer wrapping insulating barrier, consist of.Stator core 8 is also to be made by wooden structures, has vertically corresponding stator ventilation ducts 14.Connecting rod 7 is housed on this stator shaft orientation, bolt by termination regulates ventilation ducts 14 width, in the time of can measuring stator ventilation ducts 14 different in width, and uninterrupted in stator, rotor and air gap, they respectively account for the ratio of total flow, and the size of the interior wind speed of stator, rotor and air gap.
On tube-axial fan 1, be equipped with fan wind deflector 18, so that wind is concentrated, blow to peripheral region, stator and rotor Zhou center.
The transducer of four groups of measuring wind is installed altogether: extension type is installed at stator yoke back and is measured stator yoke back air velocity transducer 5 on this measurement mechanism; Extension type is installed between air gap between stator and rotor 15 and is measured rotor air velocity transducer 6; At stator faces air gap, place installs and measures air gap air velocity transducer 16; Before tube-axial fan 1, install and measure fan air velocity transducer 17.
In Fig. 2, in the air gap port of the stator and rotor of analogue means, air gap deep bead 20 is installed, air gap deep bead 20 is made taper type.Object is to stop 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:
Stator End Winding 3 tops have very large space, and the part wind that allows tube-axial fan 1 produce is discharged in air.
(1), while 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 each ventilation ducts wind speed of stator 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, sue for peace in the time of just can defining air gap deep bead 20 afterwards from stator air quantity Q out
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
111when having air gap deep bead from stator air quantity out, V
nbe the wind speed of n stator ventilation ducts, S
nit is the discharge area of n stator ventilation ducts.
(2), while removing air gap deep bead 20, measure and enter air gap 15 air quantity Q between stator and rotor
222:
Measuring air gap air velocity transducer 16, stretch at stator faces air gap place, measure wind speed herein.In order to guarantee to measure the accuracy that enters the air quantity of air gap 15 between stator and rotor, at stator yoke back, same measurement enters each ventilation ducts wind speed of stator 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
ncan obtain the air quantity Q of each ventilation ducts of stator
13, Q
23, Q
33q
n3, in the time of just can determining without air gap deep bead after summation, from stator air quantity out, be Q
333.When without air gap deep bead 20 from stator air quantity Q out
333while deducting air gap deep bead 20 from stator air quantity Q out
111just can obtain entering the air quantity Q of air gap
222, divided by the air gaps of 2 times 15 inlet area S
12, just can obtain entering the wind speed V of 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
333when without air gap deep bead from stator air quantity out.V
n3it is the wind speed of n stator ventilation ducts.S
nit is the discharge area of n 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), while 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 is measured rotor air velocity transducer 6, notice that extension type measurement rotor air velocity transducer 6 is close to outlet more, measurement is more accurate from rotor radial ventilation ducts 13 wind speed out, but also should maintain a certain distance with the rotor 2 with secondary groove, avoid encountering extension type with rotor 2 rotations of secondary groove and measure 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
n4can obtain from the air quantity Q out of the rotor 2 with secondary groove
14, Q
24, Q
34q
n4, after summation, just can determine that 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
444when without air gap deep bead 20 from rotor air quantity out.V
n4it is the wind speed in n rotor ventilation from sub-slot hole.S
n4the area in n rotor ventilation from sub-slot hole.
(4) measure the total blast volume Q of tube-axial fan 1
666:
By measuring fan air velocity transducer 17, can measure from tube-axial fan 1 wind speed V out
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, be multiplied by 2 total blast volume Q in just can 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.
Result of calculation based on above-mentioned, also can determine the air quantity Q through stator end
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
333when without air gap deep bead from stator air quantity out.
Claims (8)
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; At rotor axis (19) two ends, a tube-axial fan (1) is also respectively installed; The transducer of four groups of measuring wind is installed altogether: extension type is installed at stator yoke back and is measured stator yoke back air velocity transducer (5) on this measurement mechanism; Extension type is installed between air gap between stator and rotor (15) and is measured rotor air velocity transducer (6); At stator faces air gap place, install and measure air gap air velocity transducer (16); At the front fan air velocity transducer (17) that installs and measures of tube-axial fan (1).
2. measurement mechanism according to claim 1, it is characterized in that: the rotor (2) with secondary groove is made solid, this solid has ventilation from sub-slot ditch (12), rotor radial ventilation ducts (13) and rotor (21), in rotor (21), embeds 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) are respectively by two frequency converters (10) regulation and control; Two frequency converters (10) are subject to again a total frequency converter (11) synchronization modulation; By total frequency converter (11) synchronization modulation, make rotor (2) rotation, and make two tube-axial fans (1) produce same air quantity.
5. measurement mechanism according to claim 1, is characterized in that: connecting rod (7) is housed on stator shaft orientation, and the bolt by termination regulates ventilation ducts (14) width.
6. measurement mechanism according to claim 1, is characterized in that: on tube-axial fan (1), be equipped with fan wind deflector (18), so that wind is concentrated, blow to peripheral region, stator and rotor Zhou center.
7. measurement mechanism according to claim 1, is characterized in that: air gap deep bead (20) is installed in the air gap port at stator and rotor.
8. the method for measurement of measurement mechanism according to claim 1:
1), while 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 each ventilation ducts wind speed of stator 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, sue for peace in the time of just can defining air gap deep bead (20) afterwards from stator air quantity Q out
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
111when having air gap deep bead from stator air quantity out, V
nbe the wind speed of n stator ventilation ducts, S
nit is the discharge area of n stator ventilation ducts;
2), while removing air gap deep bead (20), measure and enter air gap between stator and rotor (15) air quantity Q
222:
Measuring air gap air velocity transducer (16), stretch at stator faces air gap place, measure wind speed herein; In order to guarantee to measure the accuracy of the air quantity that enters air gap between stator and rotor (15), at stator yoke back, same measurement enters each ventilation ducts wind speed of stator 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
ncan obtain the air quantity Q of each ventilation ducts of stator
13, Q
23, Q
33q
n3, in the time of just can determining without air gap deep bead after summation, from stator air quantity out, be Q
333; When without air gap deep bead (20) from stator air quantity Q out
333while deducting air gap deep bead (20) from stator air quantity Q out
111just can obtain entering the air quantity Q of air gap
222, divided by the air gaps of 2 times (15) inlet area S
12, just can obtain entering the wind speed V of 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
222-Q
111
V
222=Q
222/S
12/2
Q in formula
333when without air gap deep bead from stator air quantity out, V
n3be the wind speed of n stator ventilation ducts, S
nbe the discharge area of n 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), while 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 is measured rotor air velocity transducer (6), notice that extension type measurement rotor air velocity transducer (6) is close to outlet more, measurement is more accurate from rotor radial ventilation ducts (13) wind speed out, but also should maintain a certain distance with the rotor (2) with secondary groove, avoid rotor (2) rotation with secondary groove to 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
n4can obtain from the rotor with secondary groove (2) air quantity Q out
14, Q
24, Q
34q
n4, after summation, just can determine that 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
444when without air gap deep bead (20) from rotor air quantity out, V
n4it is the wind speed in n rotor ventilation from sub-slot hole; S
n4it is the area in n rotor ventilation from sub-slot hole;
4) measure the total blast volume Q of tube-axial fan (1)
666:
By measuring fan air velocity transducer (17), can measure from tube-axial fan (1) wind speed V out
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, be multiplied by 2 total blast volume Q in just can determining device
666;
Q
555=V
15×S
15
Q
666=2×Q
15
Q in formula
555be the flow of a fan, Q
666for the total blast volume in measurement mechanism;
Result of calculation based on above-mentioned, also can determine the air quantity Q through stator end
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
333when without air gap deep bead from stator air quantity out.
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| 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 |
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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| Publication Number | Publication Date |
|---|---|
| CN103595192A true CN103595192A (en) | 2014-02-19 |
| CN103595192B CN103595192B (en) | 2016-03-30 |
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|---|---|---|---|
| CN201310551634.1A Active CN103595192B (en) | 2013-11-08 | 2013-11-08 | High-rating generator stator and rotor flow wind speed measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
| US20110291415A1 (en) * | 2008-12-23 | 2011-12-01 | Michiel Eduard Cornelis Damen | Wind turbine and method for monitoring the gap length between a rotor and a stator of the wind turbine generator |
-
2013
- 2013-11-08 CN CN201310551634.1A patent/CN103595192B/en active Active
Patent Citations (2)
| 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 |
| US20110291415A1 (en) * | 2008-12-23 | 2011-12-01 | Michiel Eduard Cornelis Damen | Wind turbine and method for monitoring the gap length between a rotor and a stator of the wind turbine generator |
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| Title |
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| 安志华: ""巨型全空冷水轮发电机通风模拟试验及计算研究"", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技II辑》, 31 December 2005 (2005-12-31), pages 9 - 26 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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|---|---|
| CN103595192B (en) | 2016-03-30 |
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