Movable guide vane and hydro-generator

Abstract

The utility model provides a movable guide vane and a hydro-generator. The movable guide vane comprises a rotating shaft and a plurality of guide vanes, the guide vane valve body comprises a valve body and a protruding part, the valve body is provided with two end faces arranged oppositely and two flow guide faces connected with the two end faces and arranged oppositely, the protruding part is arranged in a protruding mode from the flow guide faces, the protruding part is provided with a connecting face and a coupling face which are connected with each other, the connecting face is connected with the flow guide faces, and the coupling face is connected with the connecting face. The coupling surface is rectangular, the coupling surface is flush with one end surface, and the coupling surface and the end surface flush with the coupling surface are connected with the rotating shaft. The connecting stability between the valve body and the rotating shaft can be improved through the protruding part, the connecting face of the protruding part and the flow guide face of the valve body is arranged to be rectangular, the contact area between the protruding part and the valve body can be increased, and therefore the section inertia moment of the protruding part can be increased, and the sealing performance of the valve body is improved. Further, the bending resistance of the high-stress area of the movable guide vane is improved, and the stress concentration problem is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, in particular to a movable guide vane and a water turbine generator. Background Art

[0002] In order to control the flow rate during the operation of the hydro-turbine generator, it is necessary to set movable guide vanes on the hydro-turbine generator. The movable guide vanes are composed of a rotating shaft and a valve body, and should have sufficient strength and rigidity to work safely under various operating conditions. During operation, the movable guide vanes are not only affected by the operating force of the relay, but also by the water pressure and the friction of the guide vane sleeve. These forces cause the movable guide vane rotating shaft and the valve body surface to produce large torsional shear stress. The existing movable guide vane structure still has high stress in the point contact area. Utility Model Content

[0003] The embodiments of the utility model provide a movable guide vane and a hydro-turbine generator, which can improve the technical problem of high stress in the existing movable guide vanes.

[0004] In a first aspect, an embodiment of the utility model provides a movable guide vane, comprising:

[0005] Rotating shaft;

[0006] The guide vane body includes a valve body main body and a raised portion, wherein the valve body main body has two end surfaces arranged opposite to each other and two guide surfaces arranged opposite to each other and connected to the two end surfaces, the raised portion is protruded from the guide surface, and the raised portion has a connecting surface and an axial connection surface connected to each other, the connecting surface is connected to the guide surface and is rectangular, the axial connection surface is flush with the end surface close to the raised portion, and the axial connection surface and the end surface flush therewith are connected to the rotating shaft.

[0007] In an embodiment of the utility model, the connection stability between the petal body and the rotating shaft can be improved by the protrusion. By setting the connecting surface between the protrusion and the guide surface of the petal body to a rectangle, the contact area between the protrusion and the petal body can be increased, thereby increasing the cross-sectional moment of inertia of the protrusion, thereby improving the bending resistance of the high stress area of ​​the movable guide vane and alleviating the stress concentration problem.

[0008] In one embodiment, the raised portion further has a first side surface, a transition surface and a second side surface which are connected in sequence, the first side surface, the transition surface and the second side surface are respectively connected to the connecting surface and the axial connecting surface, the transition surface is arranged opposite to the connecting surface, the first side surface is arranged opposite to the second side surface, the transition surface is a curved surface, and the transition surface smoothly transitions with the rotating shaft and the guide surface.

[0009] In the embodiment of the utility model, by setting the transition surface of the protrusion away from the valve body as a curved surface and smoothly transitioning with the rotating shaft and the guide surface, the interference of the protrusion on the fluid can be reduced, making it easier for water to flow through the protrusion.

[0010] In one embodiment, an intersection line between the transition surface and the axial connection surface, and an intersection line between the transition surface and the connection surface are both parallel to the flow guiding direction of the flow guiding surface.

[0011] In an embodiment of the utility model, by setting the intersection line between the transition surface and the axial joint surface and the intersection line between the transition surface and the connection surface to be parallel to the diversion direction of the diversion surface, it is possible to facilitate water flow through the transition surface. In one embodiment, the transition surface is gradually tapered in the direction close to the axial joint surface, and the connection between the first side surface and the second side surface and the transition surface is rounded, and the diameter of the rounded corner gradually increases from both ends to the middle.

[0012] In the embodiment of the utility model, by making the transition surface gradually contract in the direction close to the axial interface, the extension direction of the edge between the first side surface and the second side surface and the transition surface can be made to have a certain angle with the direction of water flow, so as to guide the flow of water and reduce the impact of water flow on the first side surface and the second side surface. By performing rounding treatment on the connection between the first side surface and the second side surface and the transition surface, the stress concentration problem can be alleviated, and the efficiency loss problems such as local fluid impact and flow separation can be prevented.

[0013] In one embodiment, the radii of both ends of the rounded corner are 0, and the radius of the middle of the rounded corner is 40 mm-50 mm.

[0014] In the embodiment of the present invention, the problem of stress concentration can be effectively alleviated by controlling the radius of the fillet.

[0015] In one embodiment, both the first side surface and the second side surface are curved surfaces, and both smoothly transition to the guide surface.

[0016] In the embodiment of the utility model, by setting the first side surface and the second side surface as curved surfaces and smoothly transitioning with the guide surface, water flow can be guided to flow through the first side surface and the second side surface while reducing the stress there.

[0017] In one embodiment, the rotating shaft includes a positioning shaft and a driving shaft, the two end faces include a first end and a second end face, each of the guide surfaces is convexly provided with two protrusions, and the two protrusions are respectively arranged close to the positioning shaft and the driving shaft.

[0018] In the embodiment of the utility model, by providing raised parts at the connection places between the guide surface and the positioning shaft and the driving shaft, the connection stability between the guide vane body and the positioning shaft and the driving shaft can be improved.

[0019] In one embodiment, a first journal disc is sleeved on the side where the positioning shaft is connected to the first end face, and the first end face and the axial joints on both sides thereof are fixedly connected to the first journal disc, and a second journal disc is sleeved on the side where the driving shaft is connected to the second end face, and the second end face and the axial joints on both sides thereof are fixedly connected to the second journal disc.

[0020] In the embodiment of the utility model, by connecting the first journal disc and the second journal disc to the shaft-joining surface, the stability of the connection between the protrusion and the rotating shaft can be improved.

[0021] In one embodiment, the positioning shaft, the driving shaft, the guide vane body, the first journal disc and the second journal disc are integrally formed.

[0022] In the embodiment of the utility model, by forming the positioning shaft, the driving shaft, the guide vane body, the first journal disc and the second journal disc in one piece, the stability of the movable guide vane can be improved and the production can be facilitated.

[0023] In a second aspect, an embodiment of the utility model provides a hydro-generator, comprising the above-mentioned movable guide vanes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of the movable guide vane provided in an embodiment of the utility model.

[0026] Description of the drawings: rotating shaft-1; positioning shaft-11; driving shaft-12; guide vane body-2; valve body-21; first end face-211; guide surface-212; raised portion-22; axial connection surface-221; first side face-222; transition surface-223; second side face-224; fillet-225; first journal disc-3; second journal disc-4. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0028] In a first aspect, an embodiment of the utility model provides a movable guide vane, comprising:

[0029] Shaft 1;

[0030] The guide vane body 2 includes a valve body main body 21 and a raised portion 22, wherein the valve body main body 21 has two end surfaces arranged opposite to each other and two guide surfaces 212 arranged opposite to each other and connected to the two end surfaces, the raised portion 22 is protruded from the guide surface 212, and the raised portion 22 has a connecting surface and an axial connection surface 221 connected to each other, the connecting surface is connected to the guide surface 212 and is rectangular, the axial connection surface 221 is flush with the end surface close to the raised portion 22, and the axial connection surface 221 and the end surface flush therewith are connected to the rotating shaft 1.

[0031] It can be understood that the rotating shaft 1 can drive the guide vane body 2 to rotate, thereby achieving flow diversion. The guide surface 212 of the guide vane body 2 is the surface through which water flows. The connecting surface is connected to the guide surface 212, that is, the connecting surface is in contact with the guide surface 212. The axial joint 221 is connected to the rotating shaft 1, and a partial area of ​​the axial joint 221 can be in contact with the rotating shaft 1, or the entire area of ​​the axial joint 221 can be in contact with the rotating shaft 1. The axial joint 221 is flush with the end face close to the raised portion 22, that is, the axial joint 221 is coplanar with an end face of the raised portion 22. The area of ​​the connecting surface can be set according to the connection needs and the flow needs. The area of ​​the axial joint 221 can be set according to the connection needs and the flow needs.

[0032] In one embodiment, the raised portion 22 further has a first side surface 222, a transition surface 223 and a second side surface 224 which are connected in sequence, the first side surface, the transition surface and the second side surface are respectively connected to the connecting surface and the axial connecting surface 221, the transition surface 223 is arranged opposite to the connecting surface, the first side surface 222 and the second side surface 224 are arranged opposite to each other, the transition surface 223 is a curved surface, and the transition surface 223 smoothly transitions with the rotating shaft 1 and the guide surface 212.

[0033] It can be understood that the protrusion 22 is surrounded by five surfaces, namely, the first side surface 222, the transition surface 223, the second side surface 224, the connection surface, and the axial connection surface 221. The transition surface 223 can be a curved surface that is recessed toward the connection surface, thereby reducing the height of the first side surface 222 and the second side surface 224, thereby reducing interference with the fluid. The bending angle of the transition surface 223 can be set according to the connection requirements and the flow requirements.

[0034] In one embodiment, the intersection line between the transition surface 223 and the axial connection surface 221 and the intersection line between the transition surface 223 and the connection surface are both parallel to the flow guiding direction of the flow guiding surface 212 .

[0035] It can be understood that the guiding direction of the guiding surface 212 is the extending direction of the guiding surface 212 , and the water flows along the extending direction of the guiding surface 212 , thereby achieving guiding.

[0036] In one embodiment, the transition surface 223 is tapered in a direction close to the axial connection surface 221 , the first side surface 222 and the second side surface 224 are chamfered at the connection with the transition surface 223 , and the diameter of the fillet 225 gradually increases from both ends to the middle.

[0037] It can be understood that the connection between the first side surface 222, the second side surface 224 and the transition surface 223 is a fillet 225, that is, the edges between the first side surface 222, the second side surface 224 and the transition surface 223 are rounded. The rounded corners can be formed by CNC machining, which can improve production efficiency and maintain the consistency of the movable guide vane.

[0038] In one embodiment, the radii of both ends of the fillet 225 are 0, and the radius of the middle of the fillet 225 is 40 mm-50 mm.

[0039] In one embodiment, both the first side surface 222 and the second side surface 224 are curved surfaces, and both smoothly transition to the guide surface 212 .

[0040] It is understood that the bending angles of the first side surface 222 and the second side surface 224 can be set according to the connection requirements and the flow requirements. The first side surface 222 and the second side surface 224 can be curved surfaces that are concave toward the connection surface, thereby reducing the interference of the first side surface 222 and the second side surface 224 with the fluid.

[0041] In one embodiment, the rotating shaft 1 includes a positioning shaft 11 and a driving shaft 12, the two end faces include a first end and a second end face, each of the guide surfaces 212 is protruding with two protrusions 22, and the two protrusions 22 are respectively arranged close to the positioning shaft 11 and the driving shaft 12.

[0042] In one embodiment, a first journal disc 3 is sleeved on the side where the positioning shaft 11 is connected to the first end face 211, and the first end face 211 and the axial connection surfaces 221 on both sides thereof are fixedly connected to the first journal disc 3, and a second journal disc 4 is sleeved on the side where the driving shaft 12 is connected to the second end face, and the second end face and the axial connection surfaces 221 on both sides thereof are fixedly connected to the second journal disc 4.

[0043] It can be understood that the first journal disc 3 and the second journal disc 4 can be used to connect the cylinder liner.

[0044] In one embodiment, the positioning shaft 11, the driving shaft 12, the guide vane body 2, the first journal disc 3 and the second journal disc 4 are integrally formed.

[0045] It can be understood that the positioning shaft 11, the driving shaft 12, the guide vane body 2, the first journal disc 3 and the second journal disc 4 are integrally formed, that is, they can be manufactured by integral casting.

[0046] In a second aspect, an embodiment of the utility model provides a hydro-generator, comprising the above-mentioned movable guide vanes.

[0047] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A movable guide vane, characterized in that: include: Rotating shaft; The guide vane body includes a valve body main body and a raised portion, wherein the valve body main body has two end surfaces arranged opposite to each other and two guide surfaces arranged opposite to each other and connected to the two end surfaces, the raised portion is protruded from the guide surface, and the raised portion has a connecting surface and an axial connection surface connected to each other, the connecting surface is connected to the guide surface and is rectangular, the axial connection surface is flush with the end surface close to the raised portion, and the axial connection surface and the end surface flush therewith are connected to the rotating shaft.

2. The movable guide vane according to claim 1, characterized in that: The raised portion also has a first side surface, a transition surface and a second side surface which are connected in sequence, the first side surface, the transition surface and the second side surface are respectively connected to the connecting surface and the axial connecting surface, the transition surface is arranged opposite to the connecting surface, the first side surface is arranged opposite to the second side surface, the transition surface is a curved surface, and the transition surface smoothly transitions with the rotating shaft and the guide surface.

3. The movable guide vane according to claim 2, characterized in that: The intersection line between the transition surface and the axial connection surface and the intersection line between the transition surface and the connection surface are both parallel to the flow guiding direction of the flow guiding surface.

4. The movable guide vane according to claim 2, characterized in that: The transition surface is gradually tapered in a direction approaching the axial joint surface, and the connection between the first side surface and the second side surface and the transition surface is rounded, and the diameter of the rounded corner gradually increases from both ends to the middle.

5. The movable guide vane according to claim 4, characterized in that: The radii of both ends of the fillet are 0, and the radius of the middle of the fillet is 40mm-50mm.

6. The movable guide vane according to claim 4, characterized in that: The first side surface and the second side surface are both curved surfaces, and both have a smooth transition with the guide surface.

7. The movable guide vane according to claim 1, characterized in that: The rotating shaft includes a positioning shaft and a driving shaft, the two end faces include a first end face and a second end face, the first end face and the second end face are respectively connected to the positioning shaft and the driving shaft, each of the guide surfaces is convexly provided with two protrusions, and the two protrusions are respectively arranged close to the positioning shaft and the driving shaft.

8. The movable guide vane according to claim 7, characterized in that: A first journal disc is sleeved on the side where the positioning shaft is connected to the first end face, and the first end face and the axial joints on both sides thereof are fixedly connected to the first journal disc. A second journal disc is sleeved on the side where the driving shaft is connected to the second end face, and the second end face and the axial joints on both sides thereof are fixedly connected to the second journal disc.

9. The movable guide vane according to claim 8, characterized in that: The positioning shaft, the driving shaft, the guide vane body, the first journal disc and the second journal disc are integrally formed.

10. A hydro-generator, characterized in that: Comprising the movable guide vane as described in any one of claims 1 to 9.

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