Combined device for anti-vibration blades of a steam turbine

Abstract

The application relates to an anti-vibration turbine blade and a combined device thereof, and relates to the field of turbine blades. The application comprises a wheel base, the wheel base comprises a base core and a base cover, the base cover is sleeved on the outer side of the base core, the base cover is fixedly connected with the base core, a plurality of turbine blades are evenly arranged on the outer side of the base cover in the circumferential direction, the lower end of the turbine blade is insertedly installed in the base cover, and the turbine blade is clamped and fixed with the base cover. The application is characterized in that an insertion slot is arranged on the wheel base, the turbine blade can be stably insertedly installed, a reinforcing assembly is installed and reinforced through the arrangement of an anti-vibration back frame, the turbine blade can be clamped on the turbine blade for use through the reinforcing assembly in the use process, and the vibration in the rotating process can be greatly reduced through the limiting of the free end of the turbine blade through the reinforcing assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine blades, in particular to an anti-vibration blade of a steam turbine and a combination device thereof. BACKGROUND

[0002] The steam turbine is an external combustion rotary machine capable of converting steam heat energy into mechanical work. Steam from a boiler enters the steam turbine and then passes through a series of annularly arranged nozzles and moving blades, so as to convert the heat energy of the steam into mechanical energy for rotating the rotor of the steam turbine. The blade plays an important role in converting the heat energy of the steam into mechanical energy, and is one of the most important components in the steam turbine.

[0003] The Chinese patent with the publication number CN204357496U discloses a steam turbine blade, which comprises a blade working part, a blade root, a blade shroud and a tie bar. The tie bar is arranged at the waist of the blade working part. The waist of the blade working part is provided with a tie bar mounting hole in the form of a circular arc with the center axis of the blade wheel as the center. The tie bar mounting hole is in communication with the tie bar supporting structure. The diameter of the internal cavity of the tie bar supporting structure gradually decreases from the inside to the outside, and the outermost diameter of the internal cavity of the tie bar supporting structure is equal to the diameter of the tie bar.

[0004] For the related technology in the above, the inventor finds that the existing steam turbine blade is independently operated, has poor integrity, and is prone to vibration during rotation. Long-term vibration fatigue can easily cause damage to the blade, thereby easily causing accidents of the steam turbine. Practical new type content

[0005] In order to increase the integrity of the blade during use and reduce the vibration fatigue of the blade, the present application provides an anti-vibration blade of a steam turbine and a combination device thereof.

[0006] The anti-vibration blade of a steam turbine and the combination device thereof provided by the present application adopt the following technical scheme:

[0007] The anti-vibration blade of a steam turbine comprises a blade wheel seat, wherein the blade wheel seat comprises a seat core and a seat cover. The seat cover is sleeved on the outer side surface of the seat core, and the seat cover is fixedly connected with the seat core. A plurality of turbine blades are uniformly arranged on the outer side surface of the seat cover in the circumferential direction. The lower end of each turbine blade is insertedly installed in the seat cover, and the turbine blade is clamped and fixed with the seat cover.

[0008] By adopting the technical scheme, the impeller seat is designed as a structure matched with the seat core and the seat cover, the seat core can be used to sleevedly install the external rotating shaft, the seat core can drive the rotating shaft to synchronously rotate, the seat cover is sleeved on the outer side of the seat core to install the turbine blades, the turbine blades can be evenly inserted and installed along the outer side of the seat cover, the turbine blades are evenly arranged to drive the impeller seat to rotate in use, the turbine blades are inserted and installed, the turbine blades can be quickly replaced when damaged, and the turbine blades can be individually disassembled and positioned for maintenance.

[0009] Optionally, an axle hole is formed at the center of the seat core, a locking key groove is arranged on the axle hole, a plurality of insertion grooves for installing the turbine blades are formed on one side of the seat cover, and the insertion grooves are evenly arranged along the circumferential direction of the seat cover.

[0010] By adopting the technical scheme, the axle hole is formed at the center of the seat core, the rotating shaft is inserted and installed, the locking key groove is arranged on the axle hole, the locking key is arranged in the locking key groove when the rotating shaft is inserted, the rotating shaft and the seat core can be fixed to each other, the rotating shaft and the seat core can synchronously rotate, and the insertion grooves are arranged on one side of the seat cover to quickly position and install the turbine blades.

[0011] Optionally, the turbine blade comprises an insertion seat and an inclined fin, the insertion seat is arranged at one end of the inclined fin, and the insertion seat and the inclined fin are integrally formed, and the insertion seat is inserted and installed in the insertion groove.

[0012] By adopting the technical scheme, the turbine blade is designed as a structure matched with the insertion seat and the inclined fin, the inclined fin can be inserted into the insertion groove through the insertion seat at the lower end to be installed, the inclined fin can be stably used, the steam passes through the inclined fin to generate thrust to drive the impeller seat to rotate, and the rotating shaft is synchronously rotated.

[0013] A combined device of an anti-vibration turbine blade based on the turbine of claim 1, comprising an anti-vibration back frame, the anti-vibration back frame is sleevedly installed on the impeller seat and the turbine blade, and the anti-vibration back frame is fixedly connected with the seat cover, a plurality of reinforcing assemblies are installed on the anti-vibration back frame along the circumferential direction, the reinforcing assemblies are clamped and fixed on the head of the inclined fin, a limiting ring frame limiting the reinforcing assemblies is also sleeved on the anti-vibration back frame, and the limiting ring frame is fixedly connected with the anti-vibration back frame.

[0014] By adopting the technical scheme, the anti-vibration back frame is sleeved on the impeller seat and the turbine blade, so that the anti-vibration back frame can be used to protect the impeller seat and the turbine blade during use, thereby increasing the safety of the whole equipment. Meanwhile, the anti-vibration back frame is fixedly installed on the seat sleeve, so that the turbine blade can be supported and protected. Then, a plurality of reinforcing components are installed on the anti-vibration back frame along the circumferential direction, so that the reinforcing components can stably clamp the head of the turbine blade, thereby greatly increasing the use strength of the turbine blade. Meanwhile, all the turbine blades are connected with the anti-vibration back frame through the reinforcing components to form a whole, thereby ensuring that the turbine blade is more stable during rotation and reducing the vibration of the single blade. After the installation of all the reinforcing components, the limiting ring frame is sleeved on the outer side of the reinforcing component, so that the reinforcing component can be stably clamped on the turbine blade. Finally, the limiting ring frame is fixed with the anti-vibration back frame through bolts.

[0015] Optionally, the anti-vibration back frame comprises a back ring plate, a connecting frame and a positioning inclined plate. The connecting frame is installed in the middle of the back ring plate. The positioning inclined plate is evenly arranged on the inner side of the back ring plate along the circumferential direction. The back ring plate, the connecting frame and the positioning inclined plate are integrally formed.

[0016] By adopting the technical scheme, the structure of the anti-vibration back frame is arranged to ensure that the back ring plate can be connected with the impeller seat through the connecting frame during use, so that the positioning inclined plate can be installed through the back ring plate. The reinforcing components can be installed through the gaps between the positioning inclined plates. The reinforcing components can be clamped and fixed on the turbine blade through the gaps between the positioning inclined plates.

[0017] Optionally, a positioning groove for installing the limiting ring frame is formed in the outer side of the back ring plate. A connecting ring connected with the seat sleeve is arranged in the middle of the connecting frame. The connecting ring is integrally formed with the connecting frame.

[0018] By adopting the technical scheme, the positioning groove is formed in the outer side of the back ring plate, so that the limiting ring frame can be stably positioned and installed in the positioning groove. Meanwhile, a corresponding threaded groove is formed in the positioning groove. When the limiting ring frame is installed in the positioning groove, the limiting ring frame can be directly fixed through bolts, so that the installation is very convenient.

[0019] Optionally, the reinforcing component comprises a concave clamping plate and an arc-shaped top plate. The arc-shaped top plate is arranged at the head of the concave clamping plate. The arc-shaped top plate is integrally formed with the concave clamping plate.

[0020] By adopting the technical scheme, the gap between the positioning inclined plates is passed through the concave clamping plate to clamp the turbine blade when in use, the arc-shaped top plate is arranged to stably adhere to the outer side of the positioning inclined plate, and the stability during clamping is easily ensured.

[0021] Optionally, the limiting ring frame comprises a main ring part, a side baffle and an extension ear plate corresponding to the positioning groove, the inner diameter of the side baffle is smaller than that of the main ring part, and the side baffle is integrally arranged on one side of the main ring part, and the extension ear plate is integrally arranged on the other side of the main ring part.

[0022] By adopting the technical scheme, the limiting ring frame is designed as the structure of the main ring part, the side baffle and the extension ear plate, the arc-shaped top plate on the outer side of the reinforcing assembly can be sleeved on the outer side of the arc-shaped top plate on the reinforcing assembly during use, so that the outer side of the reinforcing assembly is limited, the side of the reinforcing assembly is limited by the side baffle, and the stable reinforcing use of the reinforcing assembly is ensured.

[0023] In summary, the present application has at least one beneficial technical effect: the present application provides an insertion slot on the impeller seat, facilitates stable insertion and installation of the turbine blade, installs and reinforces the assembly through the anti-vibration back frame, ensures that the turbine blade can be clamped on the turbine blade during use through the reinforcing assembly, limits the free end of the turbine blade through the reinforcing assembly to greatly reduce vibration during rotation, and finally installs the limiting ring frame to further prevent the turbine blade from slipping and blocking, thereby facilitating stable rotation of the turbine impeller. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of the overall structure in the embodiment of the present application.

[0025] Figure 2 is an exploded structural schematic view of the overall structure in the embodiment of the present application when one reinforcing assembly is installed.

[0026] Figure 3 is a perspective view of the cooperation of the impeller seat and the turbine blade in the embodiment of the present application.

[0027] Figure 4 is Figure 1 is a front view of the device shown.

[0028] Figure 5 is Figure 1 is an exploded structural schematic view of the device shown when the limiting ring frame is not installed.

[0029] Figure 6 is a perspective view of the anti-vibration back frame in the embodiment of the present application.

[0030] Figure 7 is Figure 6 a front view of the device shown.

[0031] Figure 8 is a perspective view of the limiting ring frame in the embodiments of the present application.

[0032] BRIEF DESCRIPTION OF DRAWINGS: 1, impeller seat; 11, seat core; 111, shaft hole; 112, locking keyway; 12, seat sleeve; 121, insertion slot; 2, turbine blade; 21, insertion seat; 22, inclined fin; 3, anti-vibration back frame; 31, back ring plate; 311, positioning groove; 32, connecting frame; 321, connecting ring; 33, positioning inclined plate; 4, reinforcing assembly; 41, concave clamping plate; 42, arc-shaped top plate; 5, limiting ring frame; 51, main ring part; 52, side baffle; 53, extension ear plate. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] The embodiments of the present application disclose an anti-vibration blade of a steam turbine and a combined device thereof. Referring to Figure 3 and Figure 4 , an anti-vibration blade of a steam turbine, comprising an impeller seat 1, the impeller seat 1 comprising a seat core 11 and a seat sleeve 12, the seat sleeve 12 being sleeved on the outer side surface of the seat core 11, and the seat sleeve 12 being fixedly connected with the seat core 11, a plurality of turbine blades 2 being uniformly arranged on the outer side surface of the seat sleeve 12 in the circumferential direction, the lower end of the turbine blade 2 being inserted and installed in the seat sleeve 12, and the turbine blade 2 being clamped and fixed with the seat sleeve 12. By designing the impeller seat 1 into a structure that the seat core 11 and the seat sleeve 12 cooperate, it is easy to use the seat core 11 to be sleeved and installed on the external rotating shaft, so that the seat core 11 can drive the rotating shaft to rotate synchronously, and the seat sleeve 12 is sleeved on the outer side surface of the seat core 11 to ensure that the turbine blade 2 is installed through the seat sleeve 12, so that the turbine blade 2 can be uniformly inserted and installed along the outer side surface of the seat sleeve 12 during installation, and after the turbine blade 2 is completely installed on the seat sleeve 12, the impeller seat 1 can be driven to rotate during use by uniformly arranging the turbine blade 2, the insertion and installation method is not only convenient and fast for positioning and installation, but also can be quickly replaced when some turbine blade 2 is damaged, and it is convenient to individually disassemble and maintain.

[0035] Referring to Figure 3 and Figure 4As shown, the shaft hole 111 is arranged at the center of the seat core 11, the locking key slot 112 is arranged on the shaft hole 111, a plurality of insertion slots 121 for installing the turbine blade 2 are arranged on one side of the seat sleeve 12, and the insertion slots 121 are evenly arranged along the circumferential direction of the seat sleeve 12. By arranging the shaft hole 111 at the center of the seat core 11, the rotating shaft can be conveniently inserted and installed. By arranging the locking key slot 112 on the shaft hole 111, the locking key can be placed in the locking key slot 112 when the rotating shaft is inserted, so that the rotating shaft and the seat core 11 can be fixed to each other, and the rotating shaft and the seat core 11 can be conveniently rotated synchronously. By arranging a plurality of insertion slots 121 on one side of the seat sleeve 12, the turbine blade 2 can be quickly positioned and installed.

[0036] Referring to Figure 3 and Figure 4 As shown, the turbine blade 2 comprises an insertion seat 21 and an inclined fin 22, the insertion seat 21 is arranged at one end of the inclined fin 22, the insertion seat 21 and the inclined fin 22 are integrally formed, and the insertion seat 21 is inserted and installed in the insertion slot 121. By designing the turbine blade 2 as the structure that the insertion seat 21 cooperates with the inclined fin 22, the inclined fin 22 can be inserted into the insertion slot 121 through the insertion seat 21 at the lower end to be installed when it is necessary to be installed, so that the stable use of the inclined fin 22 can be ensured. After the steam passes through the inclined fin 22, the thrust can be generated to push the impeller seat 1 to rotate, and then the rotating shaft is synchronously rotated and used.

[0037] Referring to Figure 1 and Figure 2As shown in the figure, a kind of anti-vibration turbine blade combination device based on claim, including anti-vibration back frame 3, anti-vibration back frame 3 is installed on impeller seat 1 and turbine blade 2, and anti-vibration back frame 3 is fixedly connected with seat sleeve 12, anti-vibration back frame 3 is provided with a plurality of reinforcing components 4 along the circumferential direction, reinforcing component 4 is clamped and fixed at the head of inclined fin 22, anti-vibration back frame 3 is further provided with limiting ring frame 5 for limiting reinforcing component 4, limiting ring frame 5 is fixedly connected with anti-vibration back frame 3.By installing anti-vibration back frame 3 on impeller seat 1 and turbine blade 2, so that anti-vibration back frame 3 can be used to protect impeller seat 1 and turbine blade 2 during use, increase the safety of the whole equipment, and then by fixing anti-vibration back frame 3 on seat sleeve 12, so that the supporting and protecting effect of turbine blade 2 can be guaranteed, then by installing a plurality of reinforcing components 4 along the circumferential direction of anti-vibration back frame 3, reinforcing component 4 can be stably clamped on the head of turbine blade 2, thereby the use strength of turbine blade 2 can be greatly increased, and all turbine blades 2 are connected with anti-vibration back frame 3 by reinforcing component 4 to form a whole, thereby ensuring more stable during rotation, reducing the vibration of single blade, after all reinforcing components 4 are installed, limiting ring frame 5 can be installed on the outer side of reinforcing component 4, to ensure that reinforcing component 4 can be stably clamped on turbine blade 2, finally limiting ring frame 5 is fixed with anti-vibration back frame 3 by bolts.

[0038] Referring to Figure 6 And Figure 7 As shown in the figure, anti-vibration back frame 3 includes back ring plate 31, connecting frame 32 and positioning inclined plate 33, connecting frame 32 is installed in the middle of back ring plate 31, positioning inclined plate 33 is evenly arranged on the inner side of back ring plate 31 along the circumferential direction, and back ring plate 31, connecting frame 32 and positioning inclined plate 33 are integrally formed. By setting the structure of anti-vibration back frame 3, back ring plate 31 can be connected with impeller seat 1 through connecting frame 32 during use, and positioning inclined plate 33 is installed on back ring plate 31, so that reinforcing component 4 can be installed through the gap between positioning inclined plate 33, and reinforcing component 4 can be clamped and fixed on turbine blade 2 through the gap between positioning inclined plate 33. Positioning groove 311 for installing limiting ring frame 5 is formed on the outer side of back ring plate 31, connecting ring 321 connected with seat sleeve 12 is arranged in the middle of connecting frame 32, and connecting ring 321 is integrally formed with connecting frame 32. By forming positioning groove 311 on the outer side of back ring plate 31, limiting ring frame 5 can be stably positioned and installed in positioning groove 311, and corresponding thread groove is formed in positioning groove 311, so that limiting ring frame 5 can be directly fixed by bolts after being installed in positioning groove 311, which is very convenient to install.

[0039] Referring to Figure 2 AndFigure 5 As shown in the drawings, the reinforcing assembly 4 comprises a concave clamping plate 41 and an arc-shaped top plate 42, the concave clamping plate 41 is arranged at the lower end, the arc-shaped top plate 42 is arranged at the head of the concave clamping plate 41, and the arc-shaped top plate 42 is integrally formed with the concave clamping plate 41. Through the structural arrangement of the reinforcing assembly 4, it is ensured that the concave clamping plate 41 passes through the gap between the positioning inclined plates 33 and clamps on the turbine blade 2 during use, and the arc-shaped top plate 42 is arranged to stably fit on the outer side of the positioning inclined plate 33, so as to easily ensure the stability during clamping.

[0040] Referring to Figure 2 and Figure 8 As shown in the drawings, the limiting ring holder 5 comprises a main ring part 51, a side baffle 52, and an extension ear plate 53 corresponding to the positioning groove 311, the inner diameter of the side baffle 52 is smaller than that of the main ring part 51, and the side baffle 52 is integrally arranged on one side of the main ring part 51, and the extension ear plate 53 is integrally arranged on the other side of the main ring part 51. Through the design of the main ring part 51, the side baffle 52 and the extension ear plate 53, the main ring part 51 can be sleeved on the outer side of the arc-shaped top plate 42 of the reinforcing assembly 4 during use, so as to limit the outer side of the reinforcing assembly 4, and the side baffle 52 is arranged to limit the side of the reinforcing assembly 4, thereby ensuring the stable reinforcing use of the reinforcing assembly 4.

[0041] The implementation principle of the anti-vibration turbine blade and the combined device thereof in the embodiment of the application is as follows: during actual installation, the turbine blades 2 are sequentially inserted and installed into the insertion slots 121 of the impeller seat 1, after all the insertion slots 121 are installed with the turbine blades 2, the anti-vibration back frame 3 can be installed, the connecting ring 321 of the anti-vibration back frame 3 is attached to one side of the seat sleeve 12, then the anti-vibration back frame 3 is fixed on the seat sleeve 12 through bolts, then the reinforcing assembly 4 is inserted and fixed between the positioning inclined plates 33, the concave clamping plate 41 of the reinforcing assembly 4 is ensured to pass through the gap to clamp on the turbine blade 2, after all the reinforcing assemblies 4 are installed, the limiting ring holder 5 is sleeved on the arc-shaped top plate 42, and finally the extension ear plate 53 is fixedly connected with the anti-vibration back frame 3 through bolts.

[0042] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A combined device of a vibration resistant blade of a steam turbine, comprising a wheel seat (1) and comprising a vibration resistant back frame (3), characterized in that: The impeller seat (1) comprises a seat core (11) and a seat cover (12), the seat cover (12) is sleeved on the outer side of the seat core (11), and the seat cover (12) is fixedly connected with the seat core (11); a plurality of turbine blades (2) are uniformly arranged on the outer side of the seat cover (12) in the circumferential direction; the lower end of the turbine blade (2) is insertedly installed in the seat cover (12), and the turbine blade (2) is clamped and fixed with the seat cover (12). The anti-vibration back frame (3) is sleeved and installed on the impeller seat (1) and the turbine blade (2), and the anti-vibration back frame (3) is fixedly connected with the seat cover (12); a plurality of reinforcing assemblies (4) are installed on the anti-vibration back frame (3) in the circumferential direction; the reinforcing assembly (4) is clamped and fixed at the head of the inclined fin (22); a limiting ring frame (5) for limiting the reinforcing assembly (4) is sleeved on the anti-vibration back frame (3); and the limiting ring frame (5) is fixedly connected with the anti-vibration back frame (3).

2. A combination anti-vibration blade for a steam turbine as claimed in claim 1, wherein: The seat core (11) is provided with a shaft hole (111) at the center thereof; the shaft hole (111) is provided with a locking key groove (112); and a plurality of insertion grooves (121) for installing the turbine blades (2) are arranged on one side of the seat cover (12) in the circumferential direction of the seat cover (12).

3. A combination anti-vibration blade for a steam turbine as claimed in claim 2, wherein: The turbine blade (2) comprises an insertion seat (21) and an inclined fin (22); the insertion seat (21) is arranged at one end of the inclined fin (22); and the insertion seat (21) and the inclined fin (22) are integrally formed; and the insertion seat (21) is insertedly installed in the insertion groove (121).

4. A combination anti-vibration blade for a steam turbine as claimed in claim 3, wherein: The anti-vibration back frame (3) comprises a back ring plate (31), a connecting frame (32) and a positioning inclined plate (33); the connecting frame (32) is installed at the middle part of the back ring plate (31); the positioning inclined plate (33) is uniformly arranged on the inner side of the back ring plate (31) in the circumferential direction; and the back ring plate (31), the connecting frame (32) and the positioning inclined plate (33) are integrally formed.

5. A combination anti-vibration blade for a steam turbine as claimed in claim 4, wherein: The outer side of the back ring plate (31) is provided with a positioning groove (311) for installing the limiting ring frame (5); the middle part of the connecting frame (32) is provided with a connecting ring (321) connected with the seat cover (12); and the connecting ring (321) is integrally formed with the connecting frame (32).

6. A combination anti-vibration blade for a steam turbine as claimed in claim 5, wherein: The reinforcing assembly (4) comprises a concave clamping plate (41) and an arc-shaped top plate (42); the arc-shaped top plate (42) is arranged at the head of the concave clamping plate (41); and the arc-shaped top plate (42) is integrally formed with the concave clamping plate (41).

7. A combination anti-vibration blade for a steam turbine as claimed in claim 6, wherein: The limiting ring frame (5) comprises a main ring part (51), a side baffle (52) and an extension ear plate (53) corresponding to the positioning groove (311); the inner diameter of the side baffle (52) is smaller than that of the main ring part (51); the side baffle (52) is integrally formed on one side of the main ring part (51); and the extension ear plate (53) is integrally formed on the other side of the main ring part (51).

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