CN114285192A - Device and method for adjusting rotational inertia of main shaft of bulb tubular turbine - Google Patents
Device and method for adjusting rotational inertia of main shaft of bulb tubular turbine Download PDFInfo
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- CN114285192A CN114285192A CN202111610499.4A CN202111610499A CN114285192A CN 114285192 A CN114285192 A CN 114285192A CN 202111610499 A CN202111610499 A CN 202111610499A CN 114285192 A CN114285192 A CN 114285192A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a device and a method for adjusting the rotational inertia of a main shaft of a bulb tubular turbine, wherein the device comprises a permanent magnet device and an electromagnetic control device, the permanent magnet device is made of a permanent magnet material and is fixedly sleeved on the outer side wall of the main shaft; the electromagnetic control device comprises an electromagnetic controller, electromagnetic control bodies and electromagnetic coils, the electromagnetic controller is fixed on the wall of the inner shell of the bulb body and is positioned under the permanent magnet device, the electromagnetic control bodies are respectively and fixedly connected to two ends of the electromagnetic controller, the two electromagnetic control bodies are symmetrically arranged relative to the main shaft, and the electromagnetic coils are wound on the electromagnetic control bodies. Adjusting the rotational inertia of the unit, and electrifying the electromagnetic coil through the electromagnetic controller when the load of the unit is increased, wherein the electromagnetic control device and the permanent magnet device are mutually repelled by a magnetic field generated by the electromagnetic coil; when the load of the unit is reduced, the electromagnetic coil is electrified through the electromagnetic controller, and the electromagnetic control device and the permanent magnet device are attracted by each other through a magnetic field generated by the electromagnetic coil.
Description
Technical Field
The invention relates to the technical field of hydroelectric power generation, in particular to a device and a method for adjusting the rotational inertia of a main shaft of a bulb tubular turbine.
Background
The through-flow power station is a better way for developing low-head hydraulic resources, has the advantages of compact unit structure, less engineering quantity, short construction period and the like, and is rapidly developed in recent years. The bulb through-flow set is installed in the underwater bulb body, and the generator set is small in size, light in weight and small in flywheel moment, so that the rotational inertia of the bulb through-flow set is generally small. The smaller rotary inertia can lead to shorter time for starting and stopping the unit, the change of the rotating speed of the unit is faster, and the dynamic adjustment quality of the unit is difficult to control when the unit operates at a low water head and a large flow. When a load shedding test is carried out, the smaller unit rotational inertia can be seriously damaged, the rotating speed rising speed is high, the influence on flow increase is large, and the obvious pressure drop is easy to occur after the rotating speed of the load shedding unit rises, so that a negative water hammer is generated, the unit vibration is caused, when the load of the unit increases, the unit rotational inertia value needs to be reduced, and when the load of the unit decreases, the unit rotational inertia value needs to be increased.
Therefore, a device capable of adjusting the rotational inertia of the unit is needed, and particularly, when a load increase and decrease test is carried out, the device capable of adjusting different rotational inertias can be adjusted according to the change situation of the load, so that the safety and the stability of the operation of the unit are improved.
Disclosure of Invention
Aiming at the technical problem that the rotational inertia of the existing bulb tubular unit is not adjustable, the device and the method for adjusting the rotational inertia of the bulb tubular unit are provided, the device is installed on a main shaft of the unit in a bulb body, the weight of the main shaft is controlled through electromagnetic force, and therefore the rotational inertia of the unit is changed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for adjusting the rotational inertia of a main shaft of a bulb tubular turbine is arranged in a bulb body and comprises a permanent magnet device and an electromagnetic control device, wherein the permanent magnet device is arranged on the main shaft in the bulb body and is made of a permanent magnet material, the whole body is of a hollow cylindrical structure, and the permanent magnet device is fixedly sleeved on the outer side wall of the main shaft;
the electromagnetic control devices are arranged on the inner wall of the bulb body, are of circular arc symmetric structures as a whole, are located on the main shaft in circle centers and comprise electromagnetic controllers, electromagnetic control bodies and electromagnetic coils, the electromagnetic controllers are fixed on the inner wall of the bulb body and located right below the permanent magnet device, the two electromagnetic control bodies are fixedly connected to the two ends of the electromagnetic controllers respectively, the two electromagnetic control bodies are symmetrically arranged relative to the main shaft, the electromagnetic coils are wound on the electromagnetic control bodies, the sizes of the electromagnetic control bodies on the two sides are the same, the winding directions and the number of the electromagnetic coils are the same, and the electromagnetic coils are electrically connected with the electromagnetic controllers.
The electromagnetic control device is used for adjusting the current passing through the electromagnetic coil and the direction, the electromagnetic control device and the permanent magnet device are mutually repelled or attracted by the magnetic field generated by the electromagnetic coil, and when the electromagnetic control device and the permanent magnet device are mutually attracted, the permanent magnet device is acted by downward magnetic force to press the main shaft downwards, so that the rotational inertia of the unit is increased; when the permanent magnetic devices repel each other, the permanent magnetic devices are acted by upward magnetic force to lift the main shaft, and the rotational inertia of the unit is reduced.
Preferably, in order to conveniently install the permanent magnet device on the main shaft, the permanent magnet device is formed by splicing two rotational inertia adjusting blocks of a semi-circular cylindrical structure, the two rotational inertia adjusting blocks are permanent magnets, magnetic poles at the splicing positions of the two rotational inertia adjusting blocks attract each other, and the two rotational inertia adjusting blocks are coaxially sleeved on the outer side wall of the main shaft and are fixedly connected together through a connecting block.
Furthermore, the electromagnetic control body is made of soft iron or silicon steel.
Preferably, the number of the connecting blocks is four, each connecting block is provided with two screw holes, the corresponding rotational inertia adjusting blocks are also provided with screw holes, the two rotational inertia adjusting blocks are inserted into the screw holes of the connecting blocks and the screw holes of the rotational inertia adjusting blocks through bolts to be connected into a whole, and the two rotational inertia adjusting blocks are ensured to rotate together with the main shaft and do not rotate relative to the main shaft.
Preferably, in order to increase the friction force, the connection between the rotational inertia adjusting block and the spindle is firmer, and a rubber gasket is arranged between the rotational inertia adjusting block and the spindle.
Preferably, the main shafts on the two sides of the permanent magnet device are fixedly connected with a limiting block respectively, are preferably fixed with the main shafts through welding, and are used for limiting the permanent magnet device to move along the axial direction when the unit operates.
A method for adjusting the rotational inertia of a main shaft of a bulb tubular turbine is characterized in that when the load of a unit is increased, an electromagnetic coil is electrified through an electromagnetic controller, and a magnetic field generated by the electromagnetic coil enables an electromagnetic control device and a permanent magnet device to be mutually exclusive;
when the load of the unit is reduced, the electromagnetic coil is electrified through the electromagnetic controller, and the electromagnetic control device and the permanent magnet device are mutually attracted through a magnetic field generated by the electromagnetic coil;
in both cases, the current in the solenoid is in opposite directions.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the rotary inertia of the unit can be adjusted on the premise of meeting the yield strength of the main shaft according to the load change condition of the unit, and when the load of the unit is increased, the electromagnetic coil can be electrified reversely through the electromagnetic controller, so that the rotary inertia of the unit is reduced; when the load of the unit is reduced, the electromagnetic coil can be electrified in the positive direction through the electromagnetic controller, and the rotational inertia of the unit is increased.
The invention can be used for adjusting the rotational inertia of the bulb tubular turbine generator set, has fewer internal components, simple structure and convenient installation, can be directly additionally arranged on the main shaft in the bulb body and the inner shell of the bulb body, and is beneficial to maintenance. Meanwhile, the invention can be suitable for various complex working conditions so as to improve the operation safety and stability of the water turbine generator set.
Drawings
FIG. 1 is a schematic view showing the overall structure of a bulb turbine;
FIG. 2 is a schematic view of the installation position of the electromagnetic rotational inertia adjusting device in the bulb body;
fig. 3 is a schematic structural diagram of an electromagnetic rotational inertia adjusting device.
Wherein, 1, a water inlet flow channel; 2. a bulb body; 3. a guide vane; 4. a rotating wheel; 5. a draft tube; 6. a main shaft; 7. a left stop block; 8. a permanent magnet device; 8-1, adjusting a rotational inertia block A; 8-2, adjusting a rotational inertia block B; 9. a right stopper; 10. an electromagnetic control device; 10-1, an electromagnetic controller; 10-2, an electromagnetic coil; 10-3, an electromagnetic control body; 11. connecting blocks; 12. a rubber gasket.
Detailed Description
The following detailed description of specific embodiments of the present invention is provided in connection with the accompanying drawings and examples. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration and explanation only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the overall structure of the bulb tubular turbine is schematically illustrated, and the bulb tubular turbine includes a water inlet channel 1, a bulb body 2, a guide vane 3, a runner 4 and a draft tube 5, and an electromagnetic rotational inertia adjusting device is disposed in a cavity of the bulb body 2.
As shown in fig. 2, the schematic diagram of the installation position of the electromagnetic rotational inertia adjusting device in the bulb body includes a main shaft 6, a left limiting block 7, a permanent magnet device 8, a right limiting block 9 and an electromagnetic control device 10, wherein the left limiting block 7, the permanent magnet device 8 and the right limiting block 9 are installed on the main shaft 6 in the cavity of the bulb body 2, the left limiting block 7 and the right limiting block 9 are sleeved at the left end and the right end of the permanent magnet device 8 and are welded and fixed with the main shaft 6, and when the unit operates, the permanent magnet device 8 is limited to move axially; the electromagnetic control device 10 is installed right below the permanent magnet device 8 and is fixedly connected with the inner wall of the bulb body 2.
As shown in fig. 3, the permanent magnet device 8 is a hollow cylinder structure, and is formed by splicing two permanent magnets of a semi-circular cylindrical structure, which are respectively a rotational inertia adjusting a block 8-1 and a rotational inertia adjusting B block 8-2, the magnetic poles of the splicing surfaces of the rotational inertia adjusting a block 8-1 and the rotational inertia adjusting B block 8-2 are kept mutually attracted, the two permanent magnets are coaxially sleeved on the outer side wall of the main shaft 6 and are fixedly connected together through connecting blocks 11, the number of the connecting blocks 11 is four, each annular surface at least uses two connecting blocks 11, each connecting block is provided with two screw holes, corresponding permanent magnets are also provided with screw holes, the screw holes are inserted into the screw holes of the connecting blocks and the permanent magnets through bolts, so as to connect the rotational inertia adjusting a block 8-1 and the rotational inertia adjusting B block 8-2 into a whole, the rotational inertia adjusting A block 8-1 and the rotational inertia adjusting B block are tightly attached, the inner diameter of the permanent magnet device is slightly larger than the diameter of the main shaft 6, the outer diameter of the permanent magnet device is far smaller than the diameter of the section of the bulb body 2 at the installation position, and a rubber gasket 12 is arranged between the permanent magnet device and the main shaft to increase friction force.
The electromagnetic control device 10 is fixedly connected to the inner wall of the bulb body 2 and is of an arc-shaped symmetrical structure, the circle center of the electromagnetic control device is located on a main shaft 6 of the bulb body 2, the electromagnetic control device comprises two electromagnetic control bodies 10-1, 10-3 and 10-2 electromagnetic coils, the electromagnetic control bodies are fixedly welded to the inner wall of the bulb body 2 and are located right below the permanent magnet device 8, the two electromagnetic control bodies are fixedly connected to two ends of the electromagnetic control bodies through welding respectively, the two electromagnetic control bodies are symmetrically arranged relative to the main shaft, and the electromagnetic control bodies are made of soft iron or silicon steel; the electromagnetic coils are wound on the electromagnetic control bodies, the electromagnetic control bodies 10-3 on the two sides are the same in size, the winding directions and the number of the electromagnetic coils 10-2 are the same, and the electromagnetic coils 10-2 are electrically connected with the electromagnetic controller 10-1. The electromagnetic control device is matched with the permanent magnet device through magnetic force.
Example 2
In the electromagnetic adjustment rotary inertia device, the axial length of a permanent magnet device is 1.1m, the outer diameter is 2.837m, the inner diameter is 0.75m, a rotary inertia adjusting block is made of neodymium iron boron, an electromagnetic control body is made of soft iron, the arc length of the electromagnetic control body is 9.41m, the radian is 163 degrees, and electromagnetic coils on the left side and the right side of the electromagnetic control device are respectively wound by 145 circles. The electromagnetic rotational inertia adjusting device is arranged on a main shaft of a bulb tubular water turbine generator set of a certain hydropower station, the center of a rotating wheel is taken as an original point, the installation position of a permanent magnet device is 6.64m away from the original point, the diameter of the main shaft is 0.5m, and the diameter of the section of a bulb body is 6.63 m. The basic operating parameters of the power station unit are as follows: the rated power of the generator is 21MW, the rated rotation speed is 93.75r/min, the rated frequency is 50HZ, the rated output is 21.875MW, the rated water head is 9.3m, the maximum water head is 11.9m, the minimum water head is 4.7m, and the rated flow is 255.86m3The rated efficiency is 93.71 percent, and the rotational inertia of the unit is 582.13 multiplied by 103kg.m2。
The magnetic pole of the electromagnet in this embodiment is shown in fig. 3, the magnetic field of the permanent magnet is clockwise, the arrow direction in the coil is the current direction in the coil after the electromagnetic controller 10-1 is energized to the coil, and this direction is defined as a forward current for convenience of description.
Through carrying out the load increase and decrease experiment to the unit, add the contrast group of electromagnetic regulation inertia device electric current, direction, verify the effect of electromagnetic regulation inertia device, test process through the maximum rotational speed value of contrast: placing no-load and load adjusting parameters at selected values, enabling the speed regulator to be in an automatic power generation state, issuing an active pulse increasing and decreasing adjusting instruction through an LCU (lower control Unit), enabling the speed regulator to receive an load increasing/decreasing pulse signal, enabling the load of a unit to change, keeping an electromagnetic adjusting rotary inertia device not working, monitoring the change of the rotating speed of the unit in the process, and testing serial numbers 1-4; keeping other instruction parameters unchanged, starting an electromagnetic inertia adjusting device, electrifying an electromagnetic coil through an electromagnetic controller, changing the magnitude and direction of current passing through the coil, monitoring the change of the rotating speed of the unit in the process, and comparing test results, wherein the test numbers are 5-10, and the table 1 shows.
TABLE 1 comparison table of various operation parameters in load increase and decrease test of electromagnetic adjustment rotary inertia device
By combining the parameter comparison table, the electromagnetic controller is electrified when the load of the unit is increased and the current direction of the electromagnetic coil is reversed in a load increase and decrease test of the bulb tubular unit, so that the rotational inertia of the unit is reduced and the maximum rotating speed of the unit is increased; at the moment, the electromagnetic controller reversely energizes the electromagnetic coil, the formed magnetic induction lines are consistent with the magnetic induction lines on the outer side of the permanent magnet device in direction and mutually repel, and the permanent magnet device is acted by upward magnetic force to lift the main shaft, so that the rotational inertia of the unit is reduced.
When the load of the unit is reduced, the electromagnetic controller is electrified, when the current direction of the electromagnetic coil is positive, the rotational inertia of the unit can be increased, and the maximum rotating speed of the unit is reduced; at the moment, the electromagnetic controller positively energizes the electromagnetic coil, the formed magnetic induction lines are opposite to the magnetic induction lines on the outer side of the permanent magnet device in direction and attract each other, and the permanent magnet device is under the action of downward magnetic force to press the main shaft down, so that the rotational inertia of the unit is increased.
In the current control range of the electromagnetic controller, the larger the energization amount is, the larger the value of the moment of inertia is increased or decreased. Therefore, the electromagnetic adjusting device designed by the invention can effectively adjust the rotational inertia value of the unit and optimize the dynamic parameters of the unit, the electromagnetic adjusting rotational inertia device can adjust the rotational inertia of the unit according to the change condition of the load, in order to ensure the stability and the reliability of the main shaft structure, the extreme value of the electromagnetic adjusting rotational inertia needs to meet the yield strength of the main shaft, after the control device is installed, the main shaft strength can be checked, the current control range can be determined according to the check result, and the current control range of the electromagnetic controller in the embodiment is 0-300A.
Descriptions not related to the embodiments of the present invention are well known in the art, and may be implemented by referring to the well-known techniques. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A device for adjusting the rotational inertia of a main shaft of a bulb tubular turbine is characterized in that the device is arranged inside a bulb body and comprises a permanent magnet device and an electromagnetic control device, wherein the permanent magnet device is arranged on the main shaft in the bulb body and is made of a permanent magnet material, the whole body is of a hollow cylindrical structure, and the permanent magnet device is fixedly sleeved on the outer side wall of the main shaft;
the electromagnetic control devices are arranged on the inner wall of the bulb body, are of circular arc symmetric structures as a whole, are located on the main shaft in circle centers and comprise electromagnetic controllers, electromagnetic control bodies and electromagnetic coils, the electromagnetic controllers are fixed on the inner wall of the bulb body and located right below the permanent magnet device, the two electromagnetic control bodies are fixedly connected to the two ends of the electromagnetic controllers respectively, the two electromagnetic control bodies are symmetrically arranged relative to the main shaft, the electromagnetic coils are wound on the electromagnetic control bodies, the sizes of the electromagnetic control bodies on the two sides are the same, the winding directions and the number of the electromagnetic coils are the same, and the electromagnetic coils are electrically connected with the electromagnetic controllers.
2. The device of claim 1, wherein the permanent magnet device is formed by splicing two rotational inertia adjusting blocks of a semi-circular cylindrical structure, the two rotational inertia adjusting blocks are permanent magnets, magnetic poles of the splicing positions of the two rotational inertia adjusting blocks attract each other, and the two rotational inertia adjusting blocks are coaxially sleeved on the outer side wall of the main shaft and are fixedly connected together through a connecting block.
3. The device for adjusting the rotational inertia of the main shaft of a bulb-type turbine as recited in claim 2, wherein the electromagnetic control body is made of soft iron or silicon steel.
4. The device of claim 2, wherein the number of the connecting blocks is four, each connecting block has two screw holes, and the corresponding rotational inertia adjusting block has screw holes, and the two rotational inertia adjusting blocks are integrally connected by inserting bolts into the screw holes of the connecting block and the rotational inertia adjusting block.
5. The device for adjusting the rotational inertia of the main shaft of a bulb turbine as recited in claim 4, wherein a rubber gasket is disposed between the rotational inertia adjusting block and the main shaft.
6. The device for adjusting the rotational inertia of the main shaft of a bulb-type tubular turbine as recited in claim 5, wherein the main shaft on both sides of the permanent magnet device is fixedly connected with a limit block.
7. A method for adjusting the rotational inertia of a main shaft of a bulb tubular turbine is characterized in that when the load of a unit is increased, an electromagnetic coil is electrified through an electromagnetic controller, and a magnetic field generated by the electromagnetic coil enables an electromagnetic control device and a permanent magnet device to be mutually exclusive;
when the load of the unit is reduced, the electromagnetic coil is electrified through the electromagnetic controller, and the electromagnetic control device and the permanent magnet device are mutually attracted through a magnetic field generated by the electromagnetic coil;
in both cases, the current in the solenoid is in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111610499.4A CN114285192B (en) | 2021-12-27 | 2021-12-27 | Device and method for adjusting rotational inertia of main shaft of bulb through-flow turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111610499.4A CN114285192B (en) | 2021-12-27 | 2021-12-27 | Device and method for adjusting rotational inertia of main shaft of bulb through-flow turbine |
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| Publication Number | Publication Date |
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| CN114285192A true CN114285192A (en) | 2022-04-05 |
| CN114285192B CN114285192B (en) | 2023-12-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4367413A (en) * | 1980-06-02 | 1983-01-04 | Ramon Nair | Combined turbine and generator |
| EP1318299A1 (en) * | 2001-12-07 | 2003-06-11 | VA TECH HYDRO GmbH & Co. | Bulb turbine-generator unit |
| CN102828890A (en) * | 2012-09-29 | 2012-12-19 | 中水珠江规划勘测设计有限公司 | Hydroelectric generating set for micro-head hydroenergy development |
| CN207021834U (en) * | 2017-06-30 | 2018-02-16 | 湖南云箭集团有限公司 | A kind of hydrogenerator of brushless excitation |
| CN207728475U (en) * | 2017-11-29 | 2018-08-14 | 赣州发电设备成套制造有限公司 | A kind of horizontal hydrogenerator group |
| CN112392650A (en) * | 2020-10-23 | 2021-02-23 | 桑河二级水电有限公司 | Control method for low-frequency suppression during load shedding of bulb tubular unit and storage medium |
-
2021
- 2021-12-27 CN CN202111610499.4A patent/CN114285192B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4367413A (en) * | 1980-06-02 | 1983-01-04 | Ramon Nair | Combined turbine and generator |
| EP1318299A1 (en) * | 2001-12-07 | 2003-06-11 | VA TECH HYDRO GmbH & Co. | Bulb turbine-generator unit |
| CN102828890A (en) * | 2012-09-29 | 2012-12-19 | 中水珠江规划勘测设计有限公司 | Hydroelectric generating set for micro-head hydroenergy development |
| CN207021834U (en) * | 2017-06-30 | 2018-02-16 | 湖南云箭集团有限公司 | A kind of hydrogenerator of brushless excitation |
| CN207728475U (en) * | 2017-11-29 | 2018-08-14 | 赣州发电设备成套制造有限公司 | A kind of horizontal hydrogenerator group |
| CN112392650A (en) * | 2020-10-23 | 2021-02-23 | 桑河二级水电有限公司 | Control method for low-frequency suppression during load shedding of bulb tubular unit and storage medium |
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