CN106979115B - Reaction type hydraulic turbine and main shaft sealing system thereof - Google Patents

Reaction type hydraulic turbine and main shaft sealing system thereof Download PDF

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Publication number
CN106979115B
CN106979115B CN201710342562.8A CN201710342562A CN106979115B CN 106979115 B CN106979115 B CN 106979115B CN 201710342562 A CN201710342562 A CN 201710342562A CN 106979115 B CN106979115 B CN 106979115B
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water
main shaft
shaft sealing
leakage hole
sealing system
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CN106979115A (en
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王吉祥
吴国涛
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Xinjiang Yintong Construction Supervision Co ltd
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Xinjiang Yintong Construction Supervision Co ltd
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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
    • F03B3/12—Blades; Blade-carrying rotors
    • 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
    • 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 relates to a reaction type water turbine and a main shaft sealing system thereof, relates to the technical field of reaction type water turbines, and mainly aims to improve the service life of a main shaft sealing assembly of a water turbine generator set in a sediment river basin. The main shaft sealing system of the reaction turbine comprises: the top cover is provided with a shaft hole; a main shaft passing through the shaft hole, and an annular water leakage hole is formed between the main shaft and the shaft hole; the rotating wheel body is arranged at the end part of the main shaft and is positioned at one side of the top cover; the water throwing ring is arranged on the main shaft, is positioned on the other side of the top cover, has a spacing distance with the hub of the rotating wheel body, and the water blocking surface of the water throwing ring faces the water leakage hole; the water throwing ring and the main shaft synchronously rotate, and the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, so that a water blocking wall is formed at the water leakage hole. The water throwing ring and the hub cannot be rubbed, abrasion in a sediment-rich river basin is small, maintenance cost is low, frequent maintenance is not needed, and the generating capacity in the water-rich period can be improved.

Description

Reaction type hydraulic turbine and main shaft sealing system thereof
Technical Field
The invention relates to the technical field of reaction type water turbines, in particular to a reaction type water turbine and a main shaft sealing system thereof.
Background
The runner of the reaction turbine is rotated by the reaction force of water flow in water, and the pressure energy and the kinetic energy of the water flow are changed in the working process, but the pressure energy is mainly converted. The counter-impact hydraulic turbines can be classified into mixed-flow type, axial-flow type, diagonal-flow type and cross-flow type. In a mixed flow turbine, water flow radially enters a water guide mechanism and axially flows out of a rotating wheel; in an axial flow turbine, water flow enters the guide vane radially and enters and exits the runner axially; in a diagonal flow turbine, the water flow enters the guide vane radially and flows into the runner in a direction inclined to the main shaft at an angle, or flows into the guide vane and runner in a direction inclined to the main shaft; in a through-flow turbine, water flows axially into the guide vanes and the runner.
Currently, the existing main shaft sealing systems of the reaction turbine adopt comprehensive contact type sealing systems, such as: the main shaft sealing system has the advantages that the main shaft mechanical seal of the water turbine generator set with multiple silt flow fields is rapid in abrasion, the maintenance cost is high, and the electric energy generation in the water-rich period is influenced.
Disclosure of Invention
In view of the above, the present invention provides a reaction turbine and a main shaft sealing system thereof, which mainly aims to improve the service life of a main shaft sealing assembly of a hydroelectric generating set in a sediment basin.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
in one aspect, embodiments of the present invention provide a main shaft sealing system of a reaction turbine, comprising:
the top cover is provided with a shaft hole;
a main shaft passing through the shaft hole, wherein an annular water leakage hole is formed between the main shaft and the shaft hole;
the rotating wheel body is arranged at the end part of the main shaft and is positioned at one side of the top cover;
the water throwing ring is arranged on the main shaft, is positioned on the other side of the top cover, is spaced from the hub of the rotating wheel body, and has a water retaining surface facing the water leakage hole; the water throwing ring and the main shaft synchronously rotate, the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, and a water blocking wall is formed at the water leakage hole.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Optionally, in the main shaft sealing system of the reaction turbine, a distance between the water blocking surface of the water throwing ring and the hub of the runner body is between 0.5 mm and 2 mm.
Optionally, in the main shaft sealing system of the reaction turbine, the water blocking surface is an annular arc surface recessed away from the water leakage hole.
Optionally, in the main shaft sealing system of the reaction turbine, the water blocking surface is an annular inclined surface with a middle part recessed away from the water leakage hole.
Optionally, in the main shaft sealing system of the reaction turbine, the water throwing ring is positioned with the main shaft through a stable nail.
Optionally, in the main shaft sealing system of the reaction turbine, the working rotation speed of the main shaft is greater than or equal to 400r/min.
Optionally, the main shaft sealing system of the reaction turbine is as described above, wherein the working rotation speed of the main shaft is 1000r/min, 750r/min, 600r/min, 500r/min or 428.6r/min.
In another aspect, an embodiment of the present invention provides a reaction turbine including:
a main shaft sealing system of the reaction turbine;
a main shaft seal system for a reaction turbine comprising:
the top cover is provided with a shaft hole;
a main shaft passing through the shaft hole, wherein an annular water leakage hole is formed between the main shaft and the shaft hole;
the rotating wheel body is arranged at the end part of the main shaft and is positioned at one side of the top cover;
the water throwing ring is arranged on the main shaft, is positioned on the other side of the top cover, is spaced from the hub of the rotating wheel body, and has a water retaining surface facing the water leakage hole; the water throwing ring and the main shaft synchronously rotate, the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, and a water blocking wall is formed at the water leakage hole.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Optionally, in the reaction turbine, the water throwing ring is installed in a main shaft sealing water collecting chamber, and the main shaft sealing water collecting chamber is communicated with a negative pressure tail water taper pipe.
By means of the technical scheme, the reaction turbine and the main shaft sealing system thereof provided by the technical scheme have at least the following advantages:
in the technical scheme provided by the embodiment of the invention, the rotating wheel body is positioned on one side of the top cover, the water throwing ring is positioned on the other side of the top cover, the reaction water turbine is in operation, the water throwing ring and the main shaft synchronously rotate, the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, and a water blocking wall is formed at the water leakage hole, so that the water leakage hole is sealed. Compared with the prior art, because the interval distance is arranged between the water throwing ring and the hub of the rotating wheel body, the water throwing ring and the hub are not in direct contact in practice, the water throwing ring and the hub cannot be rubbed, the abrasion in a sediment-rich basin is small, the maintenance cost is low, frequent maintenance is not needed, and the generating capacity in the water-rich period can be improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic view showing a partial structure of a main shaft sealing system of a reaction turbine according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a cross section of a water slinger of a main shaft sealing system of a reaction turbine according to an embodiment of the present invention;
FIG. 3 is a schematic view of the piping connection of a main shaft sealing system of a reaction turbine according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a water slinger of a main shaft sealing system of a reaction turbine according to an embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of the reaction turbine and the main shaft sealing system thereof according to the invention with reference to the accompanying drawings and the preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Example 1
As shown in fig. 1, a main shaft sealing system of a reaction turbine according to an embodiment of the present invention includes: top cover 10, main shaft 20, runner body 30 and water slinger 40.
The top cover 10 is provided with a shaft hole; the main shaft 20 passes through the shaft hole, and an annular water leakage hole 50 is formed between the main shaft 20 and the shaft hole; the runner body 30 is arranged at the end part of the main shaft 20, and the runner body 30 is positioned at one side of the top cover 10; the water slinger 40 is arranged on the main shaft 20, the water slinger 40 is arranged on the other side of the top cover 10, a spacing distance is arranged between the water slinger 40 and the hub 31 of the rotating wheel body 30, and the water retaining surface 41 of the water slinger 40 faces the water leakage hole 50; the water slinger 40 rotates synchronously with the main shaft 20, and the water blocking surface 41 of the rotating water slinger 40 counteracts the water leaked from the water leakage hole 50, and a water blocking wall is formed at the water leakage hole 50.
In the technical scheme provided by the embodiment of the invention, the rotating wheel body is positioned on one side of the top cover, the water throwing ring is positioned on the other side of the top cover, the reaction water turbine is in operation, the water throwing ring and the main shaft synchronously rotate, the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, and a water blocking wall is formed at the water leakage hole, so that the water leakage hole is sealed. Compared with the prior art, because the interval distance is arranged between the water throwing ring and the hub of the rotating wheel body, the water throwing ring and the hub are not in direct contact in practice, the water throwing ring and the hub cannot be rubbed, the abrasion in a sediment-rich basin is small, the maintenance cost is low, frequent maintenance is not needed, and the generating capacity in the water-rich period can be improved.
In practical application, the counter-acting hydraulic turbine in the prior art can be modified, in the prior art, the high-rotation-speed hydraulic turbine adopts a main shaft piston type seal and an outer packing seal, clean water lubrication is adopted during starting, and the main shaft piston type seal and the outer packing seal are modified and changed into a mechanical ladder static ring gap seal after multiple times of modification, so that the water quality of the quinine river has larger sediment content, and the average per cubic weight of the quinine river is about ten kilograms in the water-rich period. The mechanical step seal is fast in abrasion, the piston type seal and the outer packing type seal are fast in abrasion and are worn to a large shaft of the water turbine, the drainage bent pipe and the rotating wheel are required to be removed every time the mechanical step seal is replaced, the gap adjusting precision requirement of the mechanical step seal is high, otherwise, the moving ring and the static ring are damaged by friction when the step seal rotates, and the installation is labor-and time-consuming. In the last ten years, the water-enlarging period is severely worn for 6-9 months, the multiple transformation effects are not obvious, a large amount of transformation funds are input, a large amount of manpower and material resources are input, and the normal generating capacity is influenced. The prior main shaft sealing water leakage design is discharged into a water collecting well, and then a water collecting well pump is used for discharging tail water, so that the energy consumption is high, the investment of manpower and material resources is increased, and the improvement of the main shaft sealing of the water turbine and the main shaft sealing water discharge improvement are provided. After transformation, the generating capacity of the unit is improved, maintenance personnel are reduced, maintenance cost is reduced, electricity is saved, and the service cycle of water collecting well equipment is prolonged.
The transformation process is as follows:
the mechanical seal is changed into a water slinger which is not contacted with the hub, namely, the mechanical step seal is firstly removed, the clean water lubrication pipeline system is removed, the main shaft seal is removed and discharged into a water collecting well pipeline, the main shaft seal is modified, the water slinger is arranged on the main shaft, and the water slinger is sealed with the hub. Because the mechanical ladder static ring seal is removed, a clean water lubrication system is not needed.
The guide vane is good in use after transformation, the guide vane opening is 95%, the main shaft is well sealed when the load is 2500+100kW, no water leaks from a gap between the main shaft slots, the water collecting chamber is disassembled for inspection after three months of operation, the wear of the water throwing ring is not obvious, the clearance between the water throwing ring and the hub is 0.90mm by using a clearance gauge for inspection, the wear is even, the fixing is firm and free from looseness, the temperature of the thrust tile is inspected and is free from obvious change before transformation, the volute is inspected to vibrate and is free from change before transformation, the operation effect is good, and all parameters accord with GB/T8564-2003 technical specification for installation of hydroelectric generating sets.
In order to form a good sealing effect at the water leakage hole, the interval distance (minimum interval distance) between the water blocking surface of the water throwing ring and the hub of the rotating wheel body can be between 0.5 and 2 mm. Preferably, the clearance between the water throwing ring and the hub is ensured to be 0.85mm-1 mm.
Wherein, the interval distance between the water throwing ring and the top cover is also between 0.5 and 2mm, which is preferable.
In order to make a counterattack on the water leaked from the water leakage hole through the water blocking surface, more water is withdrawn to the water leakage hole, and a water blocking wall is formed at the water leakage hole, as shown in fig. 2, the water blocking surface 41a may be a ring-shaped arc surface recessed away from the water leakage hole. In the high-speed rotation of the water throwing ring, after water leaked from the water leakage hole strikes the water blocking surface, the annular arc surface which is far away from the direction of the water leakage hole can rebound in the direction of approaching the water towards the center of the main shaft, and the water is effectively bounced to the water leakage hole. Specifically, the concave annular arc surface can be an arc surface with an inner annular surface gradually concave in an outer annular surface, or an arc surface with an intermediate annular surface gradually concave in the inner annular surface and the outer annular surface.
In another embodiment provided by the invention, the water blocking surface is an annular inclined surface with the middle part recessed away from the water leakage hole. In the high-speed rotation of the water throwing ring, after water leaked from the water leakage hole strikes the water blocking surface, the annular inclined surface with the middle part recessed away from the water leakage hole can rebound in the direction of the water approaching to the center of the main shaft, and the water can be effectively bounced to the water leakage hole.
The other side of the top cover is also provided with a main shaft sealing water collecting chamber, and the water throwing ring can be arranged in the main shaft sealing water collecting chamber. Because the water retaining wall is difficult to achieve absolute sealing, a very small amount of water can splash and collect in the main shaft sealing water collecting chamber through the interval between the water throwing ring and the top cover. As shown in fig. 3, the main shaft seal water collection chamber 60 is communicated with the tail water taper pipe 70, and then sucked out by using the taper pipe negative pressure, and discharged into the tail water taper pipe to enter the tail water.
In practical application, the reaction turbine in the prior art can be modified, and the modification process is as follows:
the main shaft seal water collecting chamber is communicated with the tail water taper pipe, the main shaft seal water leakage is sucked out by utilizing the negative pressure of the tail water taper pipe, and the water leakage is discharged into the tail water taper pipe to enter tail water.
In achieving synchronous rotation of the water slinger and the main shaft, any manner may be used, for example: the water throwing ring is connected with the main shaft through a key, or the water throwing ring is positioned with the main shaft through a stable nail, and the like.
If the water-throwing ring adopts an integral structure, it is not easy to be mounted on the spindle, in a specific implementation, as shown in fig. 4, the water-throwing ring may include a first half ring 40a and a second half ring 40b that are relatively buckled, and the first half ring 40a and the second half ring 40b are fixed by bolts 40 c.
The periphery of the shaft hole of the top cover is also provided with a leakage-stopping ring groove, the inner wall of the leakage-stopping ring groove forms the shaft hole, the hub of the rotating wheel is positioned in the shaft hole, and the hub is arranged on the main shaft, so that the water leakage hole is an annular hole between the hub and the shaft hole.
The water retaining surface is annular, and the diameter of the outer ring of the annular water retaining surface is larger than the outer diameter of the annular hole between the hub and the shaft hole, wherein the water leakage hole is the annular hole. Specifically, the outer ring of the annular water blocking surface can be at the same height with the outer wall of the top cover, or extend into the leakage-stopping ring groove, so that a higher water blocking effect can be achieved.
The higher the working rotation speed of the main shaft, the higher the main shaft tightness, and the working rotation speed of the main shaft can be more than or equal to 400r/min for realizing basically good sealing. In specific implementation, the working rotation speed of the main shaft can be 1000r/min, 750r/min, 600r/min, 500r/min or 428.6r/min.
Example two
The second embodiment of the invention provides a reaction turbine, which comprises: a spindle seal system, comprising: top cap, main shaft, runner body and water slinger.
The top cover is provided with a shaft hole; the main shaft penetrates through the shaft hole, and an annular water leakage hole is formed between the main shaft and the shaft hole; the rotating wheel body is arranged at the end part of the main shaft and is positioned at one side of the top cover; the water throwing ring is arranged on the main shaft and positioned at the other side of the top cover, a spacing distance is reserved between the water throwing ring and the hub of the rotating wheel body, and the water blocking surface of the water throwing ring faces the water leakage hole; the water throwing ring and the main shaft synchronously rotate, the water blocking surface of the rotating water throwing ring can impact water leaked from the water leakage hole, and a water blocking wall is formed at the water leakage hole.
Specifically, the spindle sealing system described in the second embodiment may directly use the spindle sealing system provided in the first embodiment, and specific implementation structures may refer to the related matters described in the first embodiment, which are not described herein again.
Specifically, the water throwing ring is arranged in a main shaft sealing water collecting chamber, and the main shaft sealing water collecting chamber is communicated with a negative-pressure tail water taper pipe.
In particular, the top cover drainage can be used for water supply and is used for technical water supply in winter. Because there is no mechanical seal, the work of disassembling the water bent pipe, disassembling the rotating wheel and the like during maintenance is not needed, and the labor intensity is reduced.
The water throwing ring provided by the embodiment of the invention is good in installation, processing and manufacturing, and the production or transformation cost of the reaction turbine is low.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the apparatus described above may be referred to with respect to each other. In addition, the "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent the merits and merits of the embodiments.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed as reflecting the intention of: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the components of the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The components of the embodiments may be combined into one component, and furthermore they may be divided into a plurality of sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the elements of any apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination. Various component embodiments of the present invention may be implemented in hardware, or in a combination thereof.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or components not listed in a claim. The word "a" or "an" preceding a component or assembly does not exclude the presence of a plurality of such components or assemblies. The invention may be implemented by means of an apparatus comprising several distinct elements. In the claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A main shaft seal system for a reaction turbine, comprising:
the top cover is provided with a leakage-stopping ring groove, and the inner wall of the leakage-stopping ring groove forms a shaft hole;
a main shaft passing through the shaft hole, wherein an annular water leakage hole is formed between the main shaft and the shaft hole;
the rotating wheel body is arranged at the end part of the main shaft and is positioned at one side of the top cover;
the water-throwing ring is arranged on the main shaft, is positioned on the other side of the top cover, is spaced from the hub of the rotating wheel body, the water-blocking surface of the water-throwing ring faces the water leakage hole, the diameter of the outer ring of the water-blocking surface is larger than the outer diameter of the water leakage hole, the water-blocking surface is an inclined surface or an arc-shaped surface, and the outer ring of the water-blocking surface and the outer wall of the top cover are positioned at the same height or extend into the water-blocking ring groove.
2. The main shaft sealing system of a water turbine according to claim 1, wherein,
the interval distance between the water blocking surface of the water throwing ring and the hub of the rotating wheel body is 0.5-2 mm.
3. The main shaft sealing system of a water turbine according to claim 1, wherein,
the water blocking surface is an annular arc surface which is far away from the water leakage hole and is recessed in the direction of the water leakage hole.
4. The main shaft sealing system of a water turbine according to claim 1, wherein,
the water blocking surface is an annular inclined surface with the middle part recessed away from the water leakage hole.
5. The main shaft sealing system of a water turbine according to claim 1, wherein,
the water throwing ring is arranged in the main shaft sealing water collecting chamber.
6. The main shaft sealing system of a water turbine according to claim 1, wherein,
the water throwing ring is positioned with the main shaft through a stable nail.
7. The main shaft sealing system of a water turbine according to claim 1, wherein,
the working rotating speed of the main shaft is more than or equal to 400r/min.
8. The main shaft seal system of a water turbine as claimed in claim 7, wherein,
the working rotation speed of the main shaft is 1000r/min, 750r/min, 600r/min, 500r/min or 428.6r/min.
9. A reaction turbine, comprising:
a main shaft sealing system of a reaction turbine according to any one of the preceding claims 1-8.
10. The water turbine of claim 9 wherein,
the water throwing ring is arranged in the main shaft sealing water collecting chamber, and the main shaft sealing water collecting chamber is communicated with the negative-pressure tail water taper pipe.
CN201710342562.8A 2017-05-16 2017-05-16 Reaction type hydraulic turbine and main shaft sealing system thereof Active CN106979115B (en)

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Application Number Priority Date Filing Date Title
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CN106979115B true CN106979115B (en) 2023-05-23

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CN114856885B (en) * 2022-06-20 2024-03-29 南方电网调峰调频发电有限公司检修试验分公司 Step type sealing structure and water turbine

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CN2172352Y (en) * 1993-07-25 1994-07-20 黄国宏 Hydrautic turbine revolving wheel with 2 impellers
CN2422490Y (en) * 2000-05-29 2001-03-07 昆明电机有限责任公司 Horizontal water turbine main shaft sealing device
CN2841996Y (en) * 2005-10-18 2006-11-29 四川东风电机厂有限公司 Water turbine contactless sealing device
CN101566119A (en) * 2009-04-03 2009-10-28 黄国宏 Adjustable gap seal and leakage treatment device
CN202520959U (en) * 2012-03-21 2012-11-07 杭州杭发发电设备有限公司 Water turbine spindle sealing device
CN203627066U (en) * 2013-12-18 2014-06-04 杭州荣源发电设备有限公司 Water turbine main shaft seal with wear-resistant rib plate
CN206707911U (en) * 2017-05-16 2017-12-05 新疆银通建设监理有限公司 Reaction turbine and its spindle seal system

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