CN110805514A - Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine - Google Patents
Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine Download PDFInfo
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- CN110805514A CN110805514A CN201911148353.5A CN201911148353A CN110805514A CN 110805514 A CN110805514 A CN 110805514A CN 201911148353 A CN201911148353 A CN 201911148353A CN 110805514 A CN110805514 A CN 110805514A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000009467 reduction Effects 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000010723 turbine oil Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 239000003657 drainage water Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/004—Valve arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/02—Casings
- F03B11/025—Covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a pressure relief and drainage device for a top cover of a horizontal mixed-flow water turbine, which comprises a pressure relief pipe, a connecting pipe, a pressure gauge, a flange and a sealing gasket, wherein the pressure relief pipe is connected with the connecting pipe; a pressure relief hole is formed in the top cover of the water turbine; the pressure relief pipe is provided with a water pressure detection device; the water inlet end of the pressure relief pipe is provided with a flange I, and the water outlet end of the pressure relief pipe is provided with a flange II; the flange I is connected with the pressure relief hole through a bolt, and a sealing gasket is arranged between the flange I and the pressure relief hole; the pressure relief pipe is provided with a valve II; the water pressure detection device comprises a connecting pipe, a valve I and a pressure gauge; a valve I is arranged on the connecting pipe; and a pressure gauge is arranged at the top end of the connecting pipe. The device has the advantages of simple structure, free assembly and disassembly and convenient maintenance, and effectively avoids the problems of accelerated deterioration of bearing lubricating oil and high temperature rise of the thrust bearing bush caused by the fact that the main shaft of the water turbine leaks water and enters the guide bearing.
Description
Technical Field
The invention belongs to the field of water turbine pressure reduction and drainage technologies, and particularly relates to a pressure relief and drainage device for a top cover of a horizontal mixed-flow water turbine.
Background
In the actual operation of the water turbine generator set, the leakage of the main shaft seal easily causes pressure water to flow into a water guide bearing of the water turbine along the axial direction, so that the lubricating oil of the bearing is deteriorated, the deterioration is accelerated, and the temperature of a water guide bearing bush of the generator set is increased to reduce the load for operation. Meanwhile, the gap between the runner crown and the water turbine top cover can increase year by year along with the high-speed running cavitation of the runner, so that the pressure of a cavity between the runner crown and the water turbine top cover is increased, but the drainage capacity of the pressure relief hole of the runner is certain, so that water which cannot be drained in the crown cavity of the runner cannot be effectively drained to tail water or a water collecting well, pressure water cannot be quickly drained or completely relieved, water pressure presses on the crown to generate axial water thrust towards the direction of a tail water pipe of the water turbine, the thrust bearing stress of the water turbine is increased rapidly by the axial water thrust, and the crown of the runner is unbalanced in stress to cause vibration, thereby causing the rubber sealing element to be worn seriously, increasing the maintenance times of the machine set for replacing the main shaft sealing element when the machine set is stopped, meanwhile, the front and rear guide bearings of the hydraulic generator can bear unbalanced vibration force of the unit, so that the temperatures of the thrust bearing and the front and rear guide bearings are increased, and the load of the unit is reduced. On the other hand, the main shaft leaks water and is connected with the hydraulic guide bearing of the hydraulic generator in series and can be mixed with turbine oil, so that the lubricating effect of the turbine oil is reduced, the friction coefficient of the thrust bush and the mirror plate is increased, the temperature rise and the load reduction operation of the thrust bush are easily caused, and the normal operation of the hydraulic generator set is influenced.
At present, when the spindle sealing water leakage and the reduction of the stress of the thrust tile and the reduction of the tile temperature are carried out on the horizontal mixed-flow water turbine, the spindle sealing element needs to be detached, the sealing element is replaced again, the stress of the thrust tile is adjusted or scraped, the effects of reducing the spindle sealing water leakage and the reduction of the thrust tile temperature can be achieved, a large amount of manpower and material resources are needed in the process, meanwhile, the spindle sealing element needs to be replaced and maintained every time of water leakage, and the overhauling cost is improved.
Disclosure of Invention
The invention provides a pressure relief and drainage device for a top cover of a horizontal mixed-flow water turbine, aiming at the problems that in the prior art, the load reduction operation of a unit is caused due to the fact that a main shaft of the horizontal mixed-flow water turbine is sealed and leaks water, the number of times of machine halt maintenance is increased, a large amount of manpower and material resources are consumed, and the cost is overhigh.
The invention is realized by the following technical scheme:
a pressure relief and drainage device for a top cover of a horizontal mixed-flow water turbine is arranged on the top cover of the water turbine and comprises a pressure relief pipe, a connecting pipe and a pressure gauge; the top cover of the water turbine is provided with a pressure relief hole, and the pressure relief hole is connected with a pressure relief pipe through a flange I; a sealing gasket is arranged between the pressure relief hole and the flange I; the other end of the pressure relief pipe, which is far away from the flange I, is provided with a flange II, the flange II is connected with a tail water pipe, and a pressure gauge and a ball valve are sequentially arranged on the pipe body of the pressure relief pipe; the pressure gauge is communicated with the pressure relief pipe through a connecting pipe; the ball valve is arranged on the pressure relief pipe body between the flange II and the pressure gauge.
The measuring range of the pressure gauge is set according to the rated water head of the water turbine; the pressure gauge measures the leakage pressure of the water turbine top cover through a switch ball valve. And closing the ball valve, namely testing pressure, opening the ball valve, discharging the pressure water, and making the data of the pressure gauge unavailable.
According to the invention, the drainage device is arranged on the top cover of the water turbine, so that partial pressure water in the cavity between the upper crown of the rotating wheel and the top cover of the water turbine can be effectively drained to the tail water pipe or the water collecting well, the problem of temperature rise of the water guide shaft and the thrust bearing bush caused by axial pressure of the top cover pressure water and rotating wheel steering unbalance force is effectively reduced, the problems of aging abrasion of the main shaft sealing part and high temperature of the water guide bush and the thrust bearing bush are reduced, and the long-term load stable operation of the unit is ensured.
In order to ensure that the main shaft of the water turbine effectively rotates, a certain gap exists between the part of the main shaft of the water turbine, which is positioned in the top cover, and the top cover, the gap is called as a water turbine crown, the width of the gap is generally about 0.01mm, the cavitation quantity is gradually increased along with the high-speed operation of the main shaft, and the gap cavity is also increased, so that a gap cavity is formed, the pressure of the gap cavity is increased, so that the load operation of the water turbine is reduced, when pressure water leaks into the gap cavity from the main shaft, because the pressure relief capacity of the rotating wheel is certain, the pressure water cannot be effectively discharged, the water pressure is pressed on the rotating wheel crown, an axial water thrust force towards the tail water pipe direction of the water turbine is generated, the thrust bearing force of the water turbine is increased rapidly by the axial water thrust force, the rotating wheel crown is unbalanced in stress, so that vibration is caused, further, meanwhile, the front and rear guide bearings of the hydraulic generator can bear unbalanced vibration force of the unit, so that the temperatures of the thrust bearing and the front and rear guide bearings are increased, and the load of the unit is reduced.
As a further improvement of the invention, the pressure relief hole is arranged at any position on the top cover of the water turbine; the sectional area of the pressure relief hole is larger than or equal to the gap area between the runner crown and the hydraulic turbine top cover.
As a further improvement of the invention, the sectional area of the pressure relief hole is larger than or equal to the size of the gap area between the runner crown and the hydraulic turbine top cover.
The pressure release hole can be installed at the optional position of hydraulic turbine top cap, the mounted position does not influence sluicing pressure discharge effect, because the pressure release ratio of pressure water is the fixed value, for and reach best pressure discharge effect, the sectional area of pressure release hole will be more than or equal to runner upper crown to the clearance area of top cap, this clearance area can be approximately equated to the top cap sectional area and subtract the clearance width after the runner sectional area again, because the clearance width between runner upper crown and the top cap is about 0.01mm, consequently can be approximately equated to the top cap sectional area and subtract the runner sectional area, this value is very little, consequently, the pressure release hole can be according to the pipeline setting on the market, its sectional area all can be big than this value.
Meanwhile, the invention also provides a use method of the pressure relief and drainage device for the top cover of the horizontal mixed-flow water turbine, which comprises the following steps:
(1) water pressure measurement: closing the ball valve, generating water pressure in the pressure relief pipe, and reading a reading on a pressure gauge after the water pressure is stable to obtain the pressure of the top cover and the cavity of the upper crown of the rotating wheel;
(2) draining and decompressing: opening the flange II, and adjusting the drainage flow through a ball valve to discharge the drainage water from the pressure relief pipe;
(3) and (5) ending pressure relief: and (4) closing the ball valve and then closing the flange II.
The invention has the beneficial effects that:
1. the invention has simple structure, free disassembly and assembly and convenient maintenance, can effectively release the pressure of the cavity between the top cover of the unit and the crown of the rotating wheel, and can eliminate the problems of vibration caused by unbalanced stress of the crown of the rotating wheel, accelerated abrasion of the rubber seal of the main shaft caused by vibration and the like, thereby reducing the times of shutdown maintenance of the unit.
2. The invention can effectively discharge partial pressure water in the cavity between the runner crown and the water turbine top cover to the draft tube or the water collecting well, reduce the water leakage of the main shaft water seal and ensure that the problem of high tile temperature caused by oil quality deterioration due to water inlet of the water turbine water guide bearing is avoided.
3. The invention avoids the problem that the turbine oil is lubricated and fed with water to be degraded due to the fact that water leakage is connected into the water turbine water guide bearing oil tank in series, so that the friction coefficient of the thrust bush and the runner plate is increased, and the temperature of the thrust bush is increased to cause the machine set to stop running.
4. After the horizontal mixed-flow water flow generating set is installed, the operation efficiency of the horizontal mixed-flow water flow generating set is improved, and the maintenance frequency of the generating set is reduced, so that the safety coefficient and the benefit of a hydropower station are greatly improved.
Drawings
FIG. 1 is a schematic view of the structure of the drainage device of the present invention.
Fig. 2 is a top view of the drain of the present invention.
Fig. 3 is a schematic structural view of the pressure relief tube of the present invention.
Reference numerals: 1-water turbine top cover, 2-pressure relief pipe, 3-connecting pipe, 4-flange II, 5-pressure gauge, 6-pressure relief hole, 7-flange I, 8-sealing gasket, 9-runner crown, 10-ball valve, 11-water turbine inlet pipe and 12-clearance cavity.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the pressure relief and drainage device for the top cover of the horizontal mixed-flow water turbine is arranged on the top cover 1 of the water turbine and comprises a pressure relief pipe 2, a connecting pipe 3 and a pressure gauge 5, when pressure water enters the water turbine from a water inlet pipe 11 of the water turbine to turn to generate power, part of the pressure water may enter a gap cavity between a runner crown 9 and the top cover 1 due to leakage of a main shaft.
The device of the embodiment is arranged on the water turbine top cover 1, the water turbine top cover 1 is provided with the pressure relief holes 6, the pressure relief holes 6 are arranged at any position of the end surface of the water turbine top cover 1, the pressure relief holes can be arranged at positions which are convenient to maintain according to the design of a water turbine, and the optimal pressure relief effect can be achieved only when the sectional areas of the pressure relief pipes 2 and the pressure relief holes 6 are larger than or equal to the gap area between the upper crown of the runner 9 and the water turbine top cover 1; the pressure relief hole 6 is connected with the pressure relief pipe 2 through a flange I7, and the flange I7 is welded with the pressure relief pipe 2; and a sealing gasket 8 is arranged between the pressure relief hole 6 and the flange I7.
The pressure relief pipe 2 is shown in fig. 3, and after the gap area between the crown and the top cover of the runner is calculated, the pressure relief pipe 2 adopts a DN32 pipe; the other end that flange I7 was kept away from to pressure release pipe 2 is equipped with flange II 4, and flange II 4 is connected with the draft tube to be equipped with manometer 5 and ball valve 10 on pressure release pipe 2's the body in proper order, ball valve 10 sets up on pressure release pipe 2 body between flange II 4 and manometer 5. The diameter of the pressure relief pipe 2 is as large as that of the pressure relief hole 6, and the pressure relief pipe 2 is a seamless pipe. The pressure gauge 5 is communicated with the pressure relief pipe 2 through a connecting pipe 3, the measuring range of the pressure gauge is set according to the rated water head of the water turbine, and the leakage pressure of the water turbine top cover 1 is measured through the switch ball valve 10.
Before the drainage device of the embodiment is used, firstly, the size of a pressure relief hole 6 is set according to the gap area between the crown of a water turbine runner 9 and a water turbine top cover 1, and the diameter of a pressure relief pipe 2 is selected to determine the total pressure relief area, then, the pressure relief drainage device is manufactured according to the actual situation, and finally, the pressure relief drainage device can be put into use by being directly installed on the water turbine top cover 1;
the use method of the pressure relief and drainage device for the top cover of the horizontal mixed-flow water turbine comprises the following steps:
(1) water pressure measurement: closing the ball valve 10, generating water pressure in the pressure relief pipe 2, and reading the reading on the pressure gauge 5 after the water pressure is stable to obtain the pressure of the top cover and the upper crown cavity of the rotating wheel;
(2) draining and decompressing: opening the flange II 4, and adjusting the drainage flow through the ball valve 10 to discharge the drainage water from the pressure relief pipe 2;
(3) and (5) ending pressure relief: firstly, closing the ball valve 10, and then closing the flange II 4.
Example 2
Compared with the embodiment, the present embodiment is different in that: the pressure relief pipe 2 adopts DN25 pipe.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made thereto by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should be considered as falling within the scope of the present invention.
Claims (3)
1. The utility model provides a horizontal mixed-flow water turbine top cap pressure release drainage device, sets up on hydraulic turbine top cap (1), its characterized in that: comprises a pressure relief pipe (2), a connecting pipe (3) and a pressure gauge (5);
the hydraulic turbine top cover (1) is provided with a pressure relief hole (6), and the pressure relief hole (6) is connected with the pressure relief pipe (2) through a flange I (7); a sealing gasket (8) is arranged between the pressure relief hole (6) and the flange I (7);
the other end of the pressure relief pipe (2), which is far away from the flange I (7), is provided with a flange II (4), and a pressure gauge (5) and a ball valve (10) are sequentially arranged on the pipe body of the pressure relief pipe (2);
the pressure gauge (5) is communicated with the pressure relief pipe (2) through a connecting pipe (3);
the ball valve (10) is arranged on a pressure relief pipe (2) body between the flange II (4) and the pressure gauge (5).
2. The pressure relief and drainage device for the top cover of the horizontal mixed-flow water turbine as claimed in claim 1, is characterized in that: the pressure relief hole (6) is arranged at any position on the water turbine top cover (1).
3. The pressure relief and drainage device for the top cover of the horizontal mixed-flow water turbine as claimed in claim 2, is characterized in that: the sectional area of the pressure relief hole (6) is larger than or equal to the size of the gap area between the upper crown of the runner (9) and the water turbine top cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148353.5A CN110805514A (en) | 2019-11-21 | 2019-11-21 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148353.5A CN110805514A (en) | 2019-11-21 | 2019-11-21 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110805514A true CN110805514A (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911148353.5A Pending CN110805514A (en) | 2019-11-21 | 2019-11-21 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
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| CN (1) | CN110805514A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107743A (en) * | 2021-05-10 | 2021-07-13 | 清华大学 | Adjusting method suitable for 700m water head section water pump turbine runner axial water thrust belt valve pressure equalizing pipe |
| CN113586312A (en) * | 2021-09-07 | 2021-11-02 | 中国水利水电科学研究院 | Top cover inner cavity design method for reducing vertical vibration hazard of top cover of water turbine |
| CN113638837A (en) * | 2021-07-28 | 2021-11-12 | 东方电气集团东方电机有限公司 | Spiral case water thrust compensation structure of hydraulic turbine |
| CN114110024A (en) * | 2021-11-18 | 2022-03-01 | 佳木斯电机股份有限公司 | Double-curve sealing pressure relief device for preventing lubricating grease of motor bearing from losing |
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| CN202300796U (en) * | 2011-11-10 | 2012-07-04 | 浙江金轮机电实业有限公司 | Pump type pressure reducing mechanism of rotary wheel of water turbine |
| CN203515926U (en) * | 2013-06-21 | 2014-04-02 | 杭州诚德发电设备有限公司 | Self-draining runner of water turbine |
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| CN105257945A (en) * | 2015-10-27 | 2016-01-20 | 苏州泰盛新绿节能环保科技有限公司 | Method for maintaining water-consumption device under flowing water |
| CN205400976U (en) * | 2016-03-01 | 2016-07-27 | 赣州联合哈电水电设备制造有限公司 | Shaft seal device of hydraulic turbine |
| CN211038892U (en) * | 2019-11-21 | 2020-07-17 | 大唐迪庆香格里拉电力开发有限公司 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
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2019
- 2019-11-21 CN CN201911148353.5A patent/CN110805514A/en active Pending
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| GB1003044A (en) * | 1961-06-28 | 1965-09-02 | Dominion Eng Works Ltd | Improvements in rotary flow hydraulic machines, such as pumps, turbines and pump-turbines |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107743A (en) * | 2021-05-10 | 2021-07-13 | 清华大学 | Adjusting method suitable for 700m water head section water pump turbine runner axial water thrust belt valve pressure equalizing pipe |
| CN113638837A (en) * | 2021-07-28 | 2021-11-12 | 东方电气集团东方电机有限公司 | Spiral case water thrust compensation structure of hydraulic turbine |
| CN113638837B (en) * | 2021-07-28 | 2023-04-25 | 东方电气集团东方电机有限公司 | Water turbine spiral case water thrust compensation structure |
| CN113586312A (en) * | 2021-09-07 | 2021-11-02 | 中国水利水电科学研究院 | Top cover inner cavity design method for reducing vertical vibration hazard of top cover of water turbine |
| CN113586312B (en) * | 2021-09-07 | 2022-10-04 | 中国水利水电科学研究院 | Top cover inner cavity design method for reducing vertical vibration hazard of top cover of water turbine |
| CN114110024A (en) * | 2021-11-18 | 2022-03-01 | 佳木斯电机股份有限公司 | Double-curve sealing pressure relief device for preventing lubricating grease of motor bearing from losing |
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