A turbine blade vibration damper device

Abstract

The present invention relates to the technical field of turbine blade vibration reduction, and discloses a turbine blade vibration damper device, which includes a blade body, and the end of the blade body is fixedly connected to a fixed platform. The present invention can allow the pressure plate to drive the surface of the rubber damping plate and the rubber damping block to tightly press against the surface of the wheel disc by setting an air cavity, a sealing plate and a connecting rod, etc., so that the amplitude of the vibration of the fixed platform is suppressed, and at the same time, the friction of the rubber damping plate will also be reduced, increasing the damping between the fixed platform and the fixed tenon plate and the wheel disc. By setting a sealing card plate, a sealing card groove and a suction cavity, etc., the rubber damping plate can be quickly replaced, and after the alcohol inside the cavity is heated and expanded, the pressure inside the cavity is increased, and the surface of the rubber damping block and the rubber damping plate will tightly press against the surface of the wheel disc, increasing the damping, and at the same time having a certain cooling effect on the fixed tenon plate.

Description

Technical Field

[0001] The invention belongs to the technical field of turbine blade vibration reduction, and in particular relates to a turbine blade vibration damper device. Background Art

[0002] As is known to all, a turbine includes a turbine rotor, which includes a plurality of impellers, each of which is provided with turbine blades arranged circumferentially. A typical blade includes a blade body, a platform, a root and a tenon, which is installed in a tenon groove on the turbine impeller to clamp the blade on the impeller. The high-temperature and high-pressure gas in the gas channel passes through the turbine blades, driving the impeller to rotate and converting the thermal energy of the gas into mechanical energy. During the operation of the engine, vibrations are introduced into the turbine blades, which may lead to premature failure of the blades if the vibrations are not eliminated;

[0003] Chinese patent CN201420683499.6 discloses a turbine blade vibration damper device, which includes two adjacent turbine blades, one of which is provided with a damping groove on its platform, a damping pin in the damping groove, one side of the groove wall of the damping groove is provided as an outward-inclined wall surface gradually inclined from the groove opening to the groove bottom, the side of the damping pin in contact with the outward-inclined wall surface after installation is provided as an inclined surface fitted with the outward-inclined wall surface, and the side of the damping pin in contact with the wall surface of the adjacent turbine blade is provided as a plane fitted with the wall surface of the adjacent turbine blade. The utility model can effectively increase the damping effect of the turbine blade.

[0004] Through the analysis of the above patents and prior art, we can know that:

[0005] In order to reduce the vibration between the existing turbine blades and the wheel disc, a rubber damping block is often provided at the bottom of the fixed platform. When the turbine blades vibrate, the rubber damping block can rest against the surface of the wheel disc to cushion the vibration of the turbine blades. This buffering method only relies on the rubber damping block provided at the bottom of the fixed platform for buffering. Therefore, the rubber damping block will be severely worn after being used for too long, and long-term use will affect the damping effect.

[0006] Therefore, those skilled in the art provide a turbine blade vibration damper device to solve the problems raised in the above background technology. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a turbine blade vibration damper device having the advantages of good damping effect and long service life of the rubber damping block, thereby solving the problem of short service life of the rubber damping block.

[0009] (II) Technical solution

[0010] In order to achieve the above-mentioned purpose of good damping effect and long service life of rubber damping block, the present invention provides the following technical solution: a turbine blade vibration damper device, including a blade body and a fixing platform:

[0011] A fixed tenon plate, the bottom of the fixed platform is fixedly connected with a fixed tenon plate;

[0012] A pressing plate is equidistantly and slidably connected inside the fixed platform;

[0013] Pressure chambers, wherein pressure chambers for contact triggering are equidistantly provided inside the fixing platform;

[0014] A connection groove, a connection groove for connecting air pressure is provided inside the fixing platform, a cavity is provided at the top center of the fixing tenon plate, an air groove is provided inside the fixing tenon plate, an air cavity is provided inside the fixing tenon plate, a sealing plate is slidably connected inside the air cavity, and a connecting rod is fixedly connected at the center of the side of the sealing plate;

[0015] A pressure block is fixedly connected to the end of the connecting rod, a rubber damping block for vibration reduction is fixedly connected to the surface of the pressure block, and a limiting slider is fixedly connected to the outer surface of the connecting rod at equal distances.

[0016] Preferably, the pressure chamber is internally slidably connected with a connecting rod, the bottom of the pressure plate is adsorbed with a rubber damping plate, a sealing card plate is fixedly connected at the center of the surface of the rubber damping plate, a sealing card groove is provided at the bottom of the pressure plate, a suction chamber is provided at the center of the bottom of the pressure plate, a sliding groove is provided inside the pressure plate, the sliding groove is internally sealingly slidably connected with an adjusting block, the internal thread of the adjusting block is connected with a threaded rod, and a positioning bearing is fixedly installed on the outer surface of the threaded rod.

[0017] Preferably, an adjustment plate is slidably connected inside the cavity, a first limit block is equidistantly fixed to the inner wall of the cavity, a second limit block is equidistantly fixed to the inner wall of the cavity, an injection groove is provided inside the fixed tenon plate, and a cooling groove is provided inside the fixed tenon plate.

[0018] Preferably, the pressing plate is "T"-shaped, the end of the connecting rod is fixedly connected to the top of the pressing plate, the diameter of the top of the connecting rod is larger than the diameter of the end, and a sealing ring is fixedly sleeved on the outer surface of the connecting rod.

[0019] Preferably, one end of the connecting groove is connected to the interior of the pressure chamber, and the other end of the connecting groove is connected to the interior of the cavity.

[0020] Preferably, the top of the air groove is connected to the interior of the cavity, and the bottom of the air groove is connected to the interior of the air cavity.

[0021] Preferably, the limit slider is arc-shaped, and arc-shaped grooves matching the size of the limit slider are equidistantly formed inside the fixed tenon plate, and the outer surface of the limit slider is slidably connected to the inside of the arc-shaped grooves.

[0022] Preferably, the size of the sealing card plate matches the size of the sealing card slot, a sealing gasket is fixed to the top of the sealing card plate, and the outer surface of the sealing card plate is slidably connected to the inside of the sealing card slot.

[0023] Preferably, the interior of the suction cavity is connected to the interior of the sliding groove, the sliding groove and the adjustment block are both square, the outer surface of the locating bearing is fixedly connected to the interior of the pressing plate, and one end of the locating bearing extends to the outer surface of the pressing plate.

[0024] Preferably, the interior of the cavity located at the lower end of the adjustment plate and the interior of the cooling groove are both filled with alcohol, the interior of the cooling groove is connected to the interior of the cavity, and the top end of the injection groove is sealed and threadedly connected with a plug.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a turbine blade vibration damper device, which has the following beneficial effects:

[0027] 1. The turbine blade vibration damper device is provided with an air cavity, a sealing plate and a connecting rod. When the fixed platform comes into contact with the wheel disc, the air pressure inside the pressure cavity can make the pressure plate drive the rubber damping plate to press tightly against the surface of the wheel disc, so as to buffer the vibration of the blade body. At the same time, when the pressure plate slides, the pressure inside the pressure cavity and the cavity will increase, and the pressure inside the air cavity will also increase at the same time, so that the surface of the rubber damping block will press tightly against the surface of the wheel disc. At this time, the vibration amplitude of the fixed platform is also suppressed, and the friction force of the rubber damping plate will also decrease, thereby increasing the damping between the fixed platform and the fixed tenon plate and the wheel disc.

[0028] 2. The turbine blade vibration damper device can facilitate the disassembly and assembly of the rubber damping plate by arranging the sealing card plate, the sealing card groove and the suction cavity. When the rubber damping plate is used for too long and is severely worn, the rubber damping plate can be quickly replaced.

[0029] 3. The turbine blade vibration damper device is provided with an adjustment plate, a first limit block and a second limit block. When the blade body rotates, the fixed platform and the fixed tenon plate will generate a relatively high temperature. After the alcohol inside the cavity expands due to the heat, it can drive the adjustment plate to slide inside the cavity, thereby increasing the pressure inside the cavity. At the same time, the pressure inside the pressure chamber and the air cavity will also increase. The surfaces of the rubber damping block and the rubber damping plate will be tightly against the surface of the wheel disc, thereby increasing the damping. At the same time, a cooling groove is provided. The alcohol filled inside the cavity and the cooling groove has a certain cooling effect on the fixed tenon plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a turbine blade vibration damper device proposed by the present invention;

[0031] Figure 2 A cross-sectional view of a fixing platform and a fixing tenon plate in a turbine blade vibration damper device proposed by the present invention;

[0032] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0033] Figure 4 A schematic structural diagram of a limit slider in a turbine blade vibration damper device proposed by the present invention;

[0034] Figure 5 A schematic structural diagram of a pressure plate and a rubber damping plate in a turbine blade vibration damper device proposed by the present invention;

[0035] Figure 6 A cross-sectional view of a pressure plate in a turbine blade vibration damper device proposed by the present invention.

[0036] In the figure: 1. blade body; 2. fixing platform; 3. fixing tenon plate; 4. pressure plate; 5. pressure chamber; 6. connecting rod; 7. connecting groove; 8. cavity; 9. air groove; 10. air cavity; 11. sealing plate; 12. connecting rod; 13. pressure block; 14. rubber damping block; 15. limiting slider; 17. rubber damping plate; 18. sealing card plate; 19. sealing card groove; 20. suction chamber; 21. sliding groove; 22. adjusting block; 23. threaded rod; 24. positioning bearing; 25. adjusting plate; 26. first limiting block; 27. second limiting block; 28. injection groove; 29. ​​cooling groove. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-4A turbine blade vibration damper device comprises a blade body 1, a fixed platform 2 is fixedly connected to the end of the blade body 1, a fixed tenon plate 3 is fixedly connected to the bottom of the fixed platform 2, a pressure plate 4 is equidistantly slidably connected to the inside of the fixed platform 2, the pressure plate 4 is "T" shaped, a pressure cavity 5 is equidistantly opened inside the fixed platform 2, a connecting rod 6 is slidably connected to the inside of the pressure cavity 5, the end of the connecting rod 6 is fixedly connected to the top of the pressure plate 4, the diameter of the top of the connecting rod 6 is larger than the diameter of the end, and a sealing ring is fixedly sleeved on the outer surface of the connecting rod 6, the fixed platform 2 A connecting groove 7 is provided inside the fixing tenon plate 3, a cavity 8 is provided at the top center of the fixing tenon plate 3, one end of the connecting groove 7 is connected to the inside of the pressure chamber 5, and the other end of the connecting groove 7 is connected to the inside of the cavity 8, an air groove 9 is provided inside the fixing tenon plate 3, an air cavity 10 is provided inside the fixing tenon plate 3, the top of the air groove 9 is connected to the inside of the cavity 8, the end of the air groove 9 is connected to the inside of the air cavity 10, a sealing plate 11 is slidably connected to the inside of the air cavity 10, a connecting rod 12 is fixedly connected to the side center of the sealing plate 11, and a connecting rod 12 is fixedly connected to the side center of the sealing plate 11. The end of the connecting rod 12 is fixedly connected with a pressure block 13, and the surface of the pressure block 13 is fixedly connected with a rubber damping block 14. The outer surface of the connecting rod 12 is equidistantly fixedly connected with a limit slider 15, and the limit slider 15 is arc-shaped. The interior of the fixed tenon plate 3 is equidistantly provided with arc grooves that match the size of the limit slider 15. The outer surface of the limit slider 15 is slidably connected to the interior of the arc groove. By setting the air cavity 10, the sealing plate 11 and the connecting rod 12, when the fixed platform 2 contacts the wheel disc, it will affect the air pressure inside the pressure cavity 5. The internal air pressure can allow the pressure plate 4 to drive the rubber damping plate 17 to press tightly against the surface of the wheel disc, thereby cushioning the vibration of the blade body 1. At the same time, when the pressure plate 4 slides, the pressure inside the pressure chamber 5 and the cavity 8 will increase, and the pressure inside the air cavity 10 will also increase at the same time, so that the surface of the rubber damping block 14 will press tightly against the surface of the wheel disc. At this time, the vibration amplitude of the fixed platform 2 is also suppressed, and the friction force of the rubber damping plate 17 will also decrease, thereby increasing the damping between the fixed platform 2 and the fixed tenon plate 3 and the wheel disc.

[0039] See also Figure 2 , Figure 5 and Figure 6A rubber damping plate 17 is adsorbed on the bottom of the pressing plate 4, a sealing card plate 18 is fixedly connected to the center of the surface of the rubber damping plate 17, a sealing card groove 19 is provided at the bottom of the pressing plate 4, the size of the sealing card plate 18 matches the size of the sealing card groove 19, a sealing gasket is fixedly connected to the top of the sealing card plate 18, the outer surface of the sealing card plate 18 is slidably connected to the inside of the sealing card groove 19, a suction cavity 20 is provided at the center of the bottom of the pressing plate 4, a sliding groove 21 is provided inside the pressing plate 4, the inside of the suction cavity 20 is connected to the inside of the sliding groove 21, and the sliding groove 21 and the adjusting block 22 are both The sliding groove 21 is square in shape, and the internal sealing sliding connection of the sliding groove 21 is connected with the adjusting block 22, and the internal thread of the adjusting block 22 is connected with the threaded rod 23, and the outer surface of the threaded rod 23 is fixedly installed with a positioning bearing 24, and the outer surface of the positioning bearing 24 is fixedly connected to the inside of the pressure plate 4, and one end of the positioning bearing 24 extends to the outer surface of the pressure plate 4. By arranging the sealing card plate 18, the sealing card groove 19 and the suction cavity 20, etc., the rubber damping plate 17 can be easily disassembled and assembled. When the rubber damping plate 17 is used for too long and is severely worn, the rubber damping plate 17 can be quickly replaced.

[0040] See also Figure 1-3 The interior of the cavity 8 is slidably connected with an adjustment plate 25, the inner wall of the cavity 8 is equidistantly fixed with a first limit block 26, the inner wall of the cavity 8 is equidistantly fixed with a second limit block 27, the interior of the fixed tenon plate 3 is provided with a liquid injection groove 28, the top of the liquid injection groove 28 is sealed and threadedly connected with a plug, the interior of the fixed tenon plate 3 is provided with a cooling groove 29, the interior of the cavity 8 is located at the lower end of the adjustment plate 25 and the interior of the cooling groove 29 are filled with alcohol, the interior of the cooling groove 29 is connected with the interior of the cavity 8, and the adjustment plate 25, the first limit block 26 and the second limit block 27 are arranged. When the limit block 27 and the blade body 1 rotate, the fixed platform 2 and the fixed tenon plate 3 will generate a higher temperature. After the alcohol inside the cavity 8 expands due to heat, it can drive the adjustment plate 25 to slide inside the cavity 8, so that the pressure inside the cavity 8 increases. At the same time, the pressure inside the pressure chamber 5 and the air cavity 10 will also increase. The surface of the rubber damping block 14 and the rubber damping plate 17 will be tightly against the surface of the wheel disc, increasing the damping. At the same time, a cooling groove 29 is provided. The alcohol filled in the cavity 8 and the cooling groove 29 has a certain cooling effect on the fixed tenon plate 3.

[0041] In summary, in the turbine blade vibration damper device, when the wheel disc is vibrated, the blade body 1 will also vibrate. At this time, due to the air pressure inside the pressure chamber 5, the pressure plate 4 can drive the rubber damping plate 17 to press tightly against the surface of the wheel disc, so as to buffer the vibration of the blade body 1. At the same time, when the pressure plate 4 slides, the pressure inside the pressure chamber 5 and the cavity 8 increases through the connecting groove 7 and the air groove 9, and the pressure inside the air cavity 10 also increases at the same time, so that the surface of the rubber damping block 14 presses tightly against the surface of the wheel disc. At this time, the vibration amplitude of the fixed platform 2 is also suppressed, and the friction force of the rubber damping plate 17 is also will become smaller. When the blade body 1 rotates, the fixing platform 2 and the fixing tenon plate 3 will generate a higher temperature. After the alcohol in the cavity 8 is heated and expanded, it can drive the adjustment plate 25 to slide inside the cavity 8, so that the pressure inside the cavity 8 increases. At the same time, the pressure inside the pressure chamber 5 and the air cavity 10 will also increase. The surface of the rubber damping block 14 and the rubber damping plate 17 will be tightly against the surface of the wheel disc, increasing the damping. At the same time, a cooling groove 29 is provided. The alcohol filled in the cavity 8 and the cooling groove 29 has a certain cooling effect on the fixing tenon plate 3, increasing the damping between the fixing platform 2 and the fixing tenon plate 3 and the wheel disc;

[0042] When the rubber damping plate 17 needs to be replaced, the outer surface of the threaded rod 23 is rotated and connected to the inside of the adjusting block 22 by rotating the threaded rod 23. At this time, the adjusting block 22 slides to the left inside the sliding groove 21. After the internal pressure of the suction chamber 20 increases, the rubber damping plate 17 will fall directly, and then the replaced rubber damping plate 17 is placed on the bottom of the pressing plate 4, so that the outer surface of the sealing card plate 18 is connected to the inside of the sealing card groove 19. At this time, by rotating the threaded rod 23 in the opposite direction, the adjusting block 22 slides to the right inside the sliding groove 21. At this time, the interior of the sliding groove 21 and the suction chamber 20 are in a negative pressure state, and the surface of the rubber damping plate 17 is tightly adsorbed on the bottom of the pressing plate 4. By setting the sealing card plate 18, the sealing card groove 19 and the suction chamber 20, etc., the rubber damping plate 17 can be easily disassembled and assembled. When the rubber damping plate 17 is used for too long and is severely worn, the rubber damping plate 17 can be quickly replaced.

[0043] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turbine blade vibration damper device, comprising a blade body, characterized in that: Also includes: Fixed platform: A fixed tenon plate, the bottom of the fixed platform is fixedly connected with a fixed tenon plate; A pressing plate is equidistantly and slidably connected inside the fixed platform; Pressure chambers, wherein pressure chambers for contact triggering are equidistantly provided inside the fixing platform; A connection groove, a connection groove for connecting air pressure is provided inside the fixing platform, a cavity is provided at the top center of the fixing tenon plate, an air groove is provided inside the fixing tenon plate, an air cavity is provided inside the fixing tenon plate, a sealing plate is slidably connected inside the air cavity, and a connecting rod is fixedly connected at the center of the side of the sealing plate; A pressure block, wherein the end of the connecting rod is fixedly connected with the pressure block, the surface of the pressure block is fixedly connected with a rubber damping block for vibration reduction, and the outer surface of the connecting rod is fixedly connected with a limit slider at equal distances; A connecting rod is slidably connected inside the pressure chamber, a fixing platform is fixedly connected to the end of the blade body, a rubber damping plate is adsorbed on the bottom of the pressure plate, and a sealing card plate is fixedly connected to the center of the surface of the rubber damping plate; A sealing slot is provided at the bottom of the pressing plate, a suction cavity is provided at the center of the bottom of the pressing plate, a sliding slot is provided inside the pressing plate, an adjusting block is sealingly and slidingly connected inside the sliding slot, a threaded rod is internally threadedly connected to the adjusting block, and a positioning bearing is fixedly installed on the outer surface of the threaded rod.

2. A turbine blade vibration damper device according to claim 1, characterized in that: An adjusting plate is slidably connected to the interior of the cavity, a first limiting block is fixedly connected to the inner wall of the cavity at an equal distance, and a second limiting block is fixedly connected to the inner wall of the cavity at an equal distance; A liquid injection groove is provided inside the fixing tenon plate, and a cooling groove is provided inside the fixing tenon plate.

3. A turbine blade vibration damper device according to claim 2, characterized in that: The pressing plate is in a "T" shape, the end of the connecting rod is fixedly connected to the top of the pressing plate, the diameter of the top of the connecting rod is larger than the diameter of the end, and a sealing ring is fixedly sleeved on the outer surface of the connecting rod.

4. A turbine blade vibration damper device according to claim 3, characterized in that: One end of the connecting groove is communicated with the interior of the pressure chamber, and the other end of the connecting groove is communicated with the interior of the cavity.

5. A turbine blade vibration damper device according to claim 1, characterized in that: The top of the air groove is communicated with the interior of the cavity, and the bottom of the air groove is communicated with the interior of the air cavity.

6. A turbine blade vibration damper device according to claim 1, characterized in that: The limit slider is arc-shaped, and the interior of the fixed tenon plate is equidistantly provided with arc grooves matching the size of the limit slider, and the outer surface of the limit slider is slidably connected to the interior of the arc groove.

7. A turbine blade vibration damper device according to claim 1, characterized in that: The size of the sealing card plate matches the size of the sealing card slot, a sealing pad is fixedly connected to the top of the sealing card plate, and the outer surface of the sealing card plate is slidably connected to the inside of the sealing card slot.

8. A turbine blade vibration damper device according to claim 1, characterized in that: The interior of the suction cavity is connected with the interior of the sliding groove, the sliding groove and the adjustment block are both square, the outer surface of the positioning bearing is fixedly connected to the interior of the pressing plate, and one end of the positioning bearing extends to the outer surface of the pressing plate.

9. A turbine blade vibration damper device according to claim 2, characterized in that: The interior of the cavity located at the lower end of the adjustment plate and the interior of the cooling groove are both filled with alcohol, the interior of the cooling groove is connected with the interior of the cavity, and the top end of the injection groove is sealed and threadedly connected with a plug.

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