CN110566393A - Paddle operating mechanism of Kaplan turbine - Google Patents
Paddle operating mechanism of Kaplan turbine Download PDFInfo
- Publication number
- CN110566393A CN110566393A CN201910957980.7A CN201910957980A CN110566393A CN 110566393 A CN110566393 A CN 110566393A CN 201910957980 A CN201910957980 A CN 201910957980A CN 110566393 A CN110566393 A CN 110566393A
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- CN
- China
- Prior art keywords
- piston
- sliding
- groove body
- operating mechanism
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F03B3/14—Rotors having adjustable blades
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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
- F03B3/14—Rotors having adjustable blades
- F03B3/145—Mechanisms for adjusting the blades
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a paddle operating mechanism of a Kaplan turbine, which comprises a runner hub, wherein at least three blades are arranged on the runner hub, a rocker arm connected with the blades is arranged in the runner hub, a piston mechanism with a slide block is arranged in the center of the runner hub, the slide block is connected with the rocker arm, an operating oil pipe is arranged in the center of the piston mechanism, and a short shaft and a main shaft which are respectively connected with the runner hub are arranged at two ends of the piston mechanism. The invention has the advantages of ingenious structural design, reliable use and low cost, and can ensure that the motion trail of the blade is limited and opened in a preset range; the friction pair is reduced, and the transmission efficiency is higher; the number of parts of the rotating part of the water turbine is reduced; the occupied structural space is reduced, so that the structure is more compact; the runner body is simplified from an inner layer and an outer layer into only the outer layer, so that the casting and processing difficulty is reduced; the design and manufacture period is shortened, and the cost is reduced.
Description
Technical Field
The invention relates to a Kaplan turbine, in particular to a blade operating mechanism of the Kaplan turbine.
Background
At present, a three-blade double-piston L-shaped sliding block type operating mechanism of a runner of a Kaplan turbine is arranged in a runner body of a rotating part of a machine set, is a specific structure for realizing expected functions in a given limited space, and is very important for reasonably utilizing the limited space to the maximum extent.
The existing paddle operating mechanisms are two types compared with the traditional paddle operating mechanisms, one type is that a double-acting piston (piston moving) is matched with an operating frame with an ear handle at one end, and then a connecting rod drives a paddle rocker arm; the other double-acting piston cylinder (the movable piston of the cylinder is not movable) is provided with an ear handle fork head directly at one side end, and a blade rocker arm is driven by a connecting rod. Two typical paddle operating mechanisms are difficult and complicated in design, the main supporting part of the paddle operating mechanism is a runner body which is double-layer, the casting and processing manufacturability is not good, and the problem is particularly prominent particularly in small and medium-sized Kaplan turbines with small sizes, and the design of the Kaplan mechanism can hardly be completed.
disclosure of Invention
The invention aims to provide a paddle operating mechanism of a Kaplan turbine, which has simple structure and high transmission efficiency and can ensure that the motion trail of a paddle is limited and opened in a preset range.
The invention aims to realize the technical scheme that the paddle operating mechanism of the Kaplan turbine comprises a runner hub, wherein at least three blades are arranged on the runner hub, a rocker arm connected with the blades is arranged in the runner hub, a piston mechanism with a slide block is arranged in the center of the runner hub, the slide block is connected with the rocker arm, an operating oil pipe is arranged in the center of the piston mechanism, and a short shaft and a main shaft which are respectively connected with the runner hub are arranged at two ends of the piston mechanism.
The piston mechanism comprises a piston groove body, the sliding block is arranged on the piston groove body, a right piston connected with the piston groove body is arranged on the right side of the piston groove body, and the main shaft is arranged on the outer side of the right piston.
Further, a sliding groove is formed in the outer wall of the piston groove body, and the sliding block is arranged in the sliding groove and can move along the sliding groove.
In the invention, the piston groove body is triangular, and three sliding grooves are uniformly arranged on the piston groove body; the number of the sliding blocks is three, and the three sliding blocks are respectively positioned in the three sliding grooves; the sliding grooves are respectively connected with the corresponding rocker arms through pins.
Or the piston groove body is square, and four sliding grooves are uniformly distributed on the piston groove body; the number of the sliding blocks is four, and the four sliding blocks are respectively positioned in the four sliding grooves; the sliding grooves are respectively connected with the corresponding rocker arms through pins.
In order to ensure sealing, a positive thrust bearing and a negative thrust bearing are arranged on the side surface of the rotating wheel body and are positioned between the rotating wheel body and the blades as well as between the rotating wheel body and the rocker arm; and a blade seal is arranged on one side of the upper part of the positive and negative thrust bearing and between the runner hub and the blades, and a seal gland is arranged on the upper end surface of the blade seal and connected with the runner hub.
By adopting the technical scheme, the invention has the advantages of ingenious structural design, reliable use and low cost, and simultaneously has the following advantages:
1. The blade motion track can be opened in a limited way in a preset range;
2. The friction pair is reduced, and the transmission efficiency is higher;
3. The number of parts of the rotating part of the water turbine is reduced;
4. The occupied structural space is reduced, so that the structure is more compact;
5. The runner body is simplified from an inner layer and an outer layer into only the outer layer, so that the casting and processing difficulty is reduced;
6. The design and manufacturing period is shortened, and the cost is reduced;
7. The paddle operating mechanism is arranged in the rear, so that the rotating part of the cantilever can be shortened, the mechanical model becomes excellent, and the running stability of the unit is improved;
8. The supporting mode of the blades of the water turbine is improved, the structure of the rear runner body is optimized, and the problem that the small-size axial flow water machine realizes the operation of the rotating propeller is solved.
drawings
the drawings of the invention are illustrated as follows:
FIG. 1 is a schematic structural view of the present invention;
3 FIG. 3 2 3 is 3 a 3 first 3 schematic 3 view 3 of 3 the 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
3 fig. 3 3 3 is 3 a 3 second 3 schematic 3 structure 3 view 3 of 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3
Detailed Description
The following detailed description of the embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention claimed in the claims.
example 1: as shown in fig. 1 and 2, a paddle operating mechanism of a Kaplan turbine comprises a runner hub 1, at least three blades 2 are arranged on the runner hub 1, a rocker arm 3 connected with the blades 2 is arranged in the runner hub 1, a piston mechanism with a slider 4 is arranged at the center of the runner hub 1, the slider 4 is connected with the rocker arm 3, an operating oil pipe 5 is arranged at the center of the piston mechanism, and a short shaft 6 and a main shaft 7 which are respectively connected with the runner hub 1 are arranged at two ends of the piston mechanism.
The piston mechanism comprises a piston groove body 8, the sliding block 4 is arranged on the piston groove body 8, a right piston 9 connected with the piston groove body 8 is arranged on the right side of the piston groove body 8, and the main shaft 7 is arranged on the outer side of the right piston 9.
Further, a sliding groove 10 is arranged on the outer wall of the piston groove body 8, and the sliding block 4 is arranged in the sliding groove 10 and can move along the sliding groove 10.
In this embodiment, the piston groove body 8 is triangular, and three sliding grooves 10 are uniformly arranged on the piston groove body 8; the number of the sliding blocks 4 is three, and the three sliding blocks 4 are respectively positioned in the three sliding grooves 10; the sliding grooves 10 are respectively connected with the corresponding rocker arms 3 through pins.
the invention works as follows: after two pistons and cylinders at two ends of the rotating wheel body 1 are combined into a paddle servomotor, when alternatively supplying and returning oil outside, the paddle servomotor axially reciprocates, a piston groove body 8 fixedly connected with the paddle servomotor also reciprocates, a sliding block 4 arranged in a sliding groove 10 of the piston groove body 8 moves up and down along with the reciprocating movement, a pin connected with a rocker arm 3 is inserted into an inner hole of the sliding block 4, so that the rocker arm 3 can only do circular motion around the center of the blade 2, the sliding block 4 can still do central motion around the support (blade) of the rocker arm while axially moving, the blade 2 is driven to swing around the support center, and the control and adjustment of the working angle of the blade are further completed.
Example 2: as shown in fig. 3, in this embodiment, the piston groove body 8 is square, and four sliding grooves 10 are uniformly arranged on the piston groove body 8; the number of the sliding blocks 4 is four, and the four sliding blocks 4 are respectively positioned in the four sliding grooves 10; the sliding grooves 10 are respectively connected with the corresponding rocker arms 3 through pins.
in the present invention, firstly, the connecting rod is not required; secondly, the axial stroke of the sliding block 4 is the sine value of the radius corner of the center of the pin on the rocker arm, the radial stroke is the cosine value, the corner of the general blade 2 cannot exceed 36 degrees, and the sine value of the axial stroke is far larger than the cosine value of the radial stroke. The axial space is relatively large; the radial stroke is small, the required movement space is small, the radius-force arm of the rocker arm 3 can be properly increased in the limited space, the force arm is increased, or the diameters of the piston groove body 8 and the right piston 9 are reduced; or the oil pressure level of the unit operation is reduced, or the same piston size is adopted, the operation work is increased, and the applicable water head is improved; or is suitable for the lower operation oil pressure of the unit; even the hub ratio of the rotating wheel can be structurally reduced, and the overcurrent capacity of the unit is increased; meanwhile, the support mode of the water turbine blade is improved from a double-fulcrum single-side cantilever to a single composite fulcrum single-side cantilever; the internal structure of the runner body 1 is simplified, and the available space is increased.
in order to ensure the sealing between the blades and the rotating wheel body and the sealing in the rotating wheel body, a positive thrust bearing 11 and a negative thrust bearing 11 are arranged on the side surface of the rotating wheel body 1 and between the rotating wheel body 1 and the blades 2 as well as between the rotating wheel body and the rocker arm 3; a blade seal 12 is arranged on one side of the upper part of the forward and reverse thrust bearing 11 and between the runner hub 1 and the blade 2, a seal gland 13 is arranged on the upper end surface of the blade seal 12, and the seal gland 13 is connected with the runner hub 1.
Claims (6)
1. The utility model provides a paddle operating mechanism of a Kaplan turbine, includes runner hub (1) be provided with at least three blade (2), characterized by on runner hub (1): the impeller is characterized in that a rocker arm (3) connected with blades (2) is arranged in the impeller body (1), a piston mechanism with a sliding block (4) is arranged at the center of the impeller body (1), the sliding block (4) is connected with the rocker arm (3), an operation oil pipe (5) is arranged at the center of the piston mechanism, and a short shaft (6) and a main shaft (7) which are respectively connected with the impeller body (1) are arranged at two ends of the piston mechanism.
2. The Kaplan turbine blade operating mechanism as claimed in claim 1, wherein: the piston mechanism comprises a piston groove body (8), the sliding block (4) is arranged on the piston groove body (8), a right piston (9) connected with the piston groove body (8) is arranged on the right side of the piston groove body (8), and the main shaft (7) is arranged on the outer side of the right piston (9).
3. The Kaplan turbine blade operating mechanism as claimed in claim 2, wherein: the outer wall of the piston groove body (8) is provided with a sliding groove (10), and the sliding block (4) is arranged in the sliding groove (10) and can move along the sliding groove (10).
4. a Kaplan turbine blade operating mechanism as claimed in claim 3, wherein: the piston groove body (8) is triangular, and three sliding grooves (10) are uniformly arranged on the piston groove body (8); the number of the sliding blocks (4) is three, and the three sliding blocks (4) are respectively positioned in the three sliding grooves (10); the sliding grooves (10) are respectively connected with the corresponding rocker arms (3) through pins.
5. A Kaplan turbine blade operating mechanism as claimed in claim 3, wherein: the piston groove body (8) is square, and four sliding grooves (10) are uniformly arranged on the piston groove body (8); the number of the sliding blocks (4) is four, and the four sliding blocks (4) are respectively positioned in the four sliding grooves (10); the sliding grooves (10) are respectively connected with the corresponding rocker arms (3) through pins.
6. the Kaplan turbine blade operating mechanism as claimed in claim 4 or 5, wherein: a positive thrust bearing and a negative thrust bearing (11) are arranged on the side surface of the rotating wheel body (1) and positioned between the rotating wheel body (1) and the blades (2) and between the rotating wheel body and the rocker arms (3); the blade sealing structure is characterized in that a blade seal (12) is arranged on one side of the upper portion of the forward thrust bearing (11) and between the rotating wheel body (1) and the blade (2), a sealing gland (13) is arranged on the upper end face of the blade seal (12), and the sealing gland (13) is connected with the rotating wheel body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910957980.7A CN110566393A (en) | 2019-10-10 | 2019-10-10 | Paddle operating mechanism of Kaplan turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910957980.7A CN110566393A (en) | 2019-10-10 | 2019-10-10 | Paddle operating mechanism of Kaplan turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566393A true CN110566393A (en) | 2019-12-13 |
Family
ID=68784390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910957980.7A Pending CN110566393A (en) | 2019-10-10 | 2019-10-10 | Paddle operating mechanism of Kaplan turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566393A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980850A (en) * | 2020-07-21 | 2020-11-24 | 东方电气集团东方电机有限公司 | Paddle operating mechanism for rotary-paddle type water turbine |
-
2019
- 2019-10-10 CN CN201910957980.7A patent/CN110566393A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980850A (en) * | 2020-07-21 | 2020-11-24 | 东方电气集团东方电机有限公司 | Paddle operating mechanism for rotary-paddle type water turbine |
| CN111980850B (en) * | 2020-07-21 | 2022-01-25 | 东方电气集团东方电机有限公司 | Paddle operating mechanism for rotary-paddle type water turbine |
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