A vibration damping device for a thermal power steam turbine

Abstract

The utility model discloses a kind of vibration reduction devices of thermal power steam turbine, belong to thermal power generation technical field, a kind of vibration reduction devices of thermal power steam turbine, including support mechanism, and the inside of support mechanism is equipped with damping mechanism;Support mechanism includes two support components, and is respectively arranged at the both ends of damping mechanism;Each support component includes the support plate and the cover plate that mutually buckling, relative to cover plate, support plate is closer to damping mechanism;The second side of cover plate away from support plate is flat plane, and the second side of the cover plate on support mechanism upper end is fixedly connected with the positioning mechanism of thermal power steam turbine.The vibration reduction device of the thermal power steam turbine, setting flat cover plate covers support plate, can make two boards form whole, strengthen damping effect and prolong the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, and in particular to a vibration reduction device for a thermal power steam turbine. Background Technology

[0002] As the core power equipment of thermal power generation system, the steam turbine of thermal power is prone to vibration during operation due to changes in operating conditions such as rotor imbalance, airflow excitation, bearing misalignment, blade flutter and unit start-up and shutdown. This not only leads to increased equipment operating noise, accelerated wear of parts and shortened service life, but may also cause unit failure and shutdown or even serious safety accidents, directly affecting the stability, reliability and economy of the power generation system.

[0003] Existing vibration damping devices for thermal power turbines are designed with a large number of open spaces and frame structures to facilitate bolt installation, and the flatness of the device connection surfaces is insufficient. This structural design and lack of precision in the machining of connection surfaces make the device susceptible to deformation due to factors such as operating vibration and load during long-term use. This reduces the vibration damping effect, affects the assembly accuracy of the device and the turbine, and may even aggravate the wear of parts, shorten the service life of the device, and make it difficult to ensure the long-term stable operation of thermal power turbines. Therefore, we propose a vibration damping device for thermal power turbines. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a vibration reduction device for thermal power steam turbines. By setting a flat cover plate to cover the support plate and matching it with a corresponding connection structure, the two plates can be integrated into a whole, reducing the internal hollow space, thereby improving the structural rigidity and stability of the device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A vibration damping device for a thermal power steam turbine includes a support mechanism, and a vibration damping mechanism is installed on the inner side of the support mechanism.

[0007] The support mechanism includes two support components, which are respectively located at both ends of the vibration damping mechanism; each support component includes a support plate and a cover plate that are interlocked, with the support plate being closer to the vibration damping mechanism than the cover plate.

[0008] A locking block is provided in the middle of the first side of the support plate away from the vibration damping mechanism, and a connecting hole is provided at the corner of the first side; a circular groove is provided on the first side of the cover plate facing the support plate, opposite to each connecting hole, and the diameter of the groove is larger than the diameter of the connecting hole; a slot is provided in the middle of the first side of the cover plate; after the support plate and the cover plate are fastened together, each groove is coaxial with the corresponding connecting hole, and each locking block is inserted into the corresponding slot.

[0009] The second side of the cover plate away from the support plate is a flat plane, and the second side of the cover plate at the upper end of the support mechanism is fixedly connected to the positioning mechanism of the thermal power turbine.

[0010] Furthermore, the vibration damping mechanism includes multiple vibration damping components arranged symmetrically. Each vibration damping component includes a connecting rod. A damper passes through each of the two ends of the connecting rod and is movably connected to it. Threaded rods are connected to both ends of the connecting rod. A spring is installed on the outer side of the connecting rod and the damper on the connecting rod.

[0011] The threaded rod is inserted into the corresponding connecting hole on each support plate.

[0012] Furthermore, the positioning mechanism includes a base, with supports on the left and right sides of the upper end of the base, and the turbine body is mounted between the two supports.

[0013] Furthermore, a protruding connecting block is provided in the middle of the first side of the support plate, and multiple reinforcing ribs protruding relative to the first side of the support plate are connected to the outer ends of the connecting block. A locking block is provided between two adjacent reinforcing ribs, and a connecting hole is provided through the corner formed by the outer side of the reinforcing rib without adjacent reinforcing ribs and the connecting block.

[0014] Furthermore, a protruding mating block is provided on the first side of the cover plate at a position opposite to each connecting hole, and a groove is provided at the center of the mating block.

[0015] After the support plate and the cover plate are fastened together, each mating block is inserted into the corner formed by the reinforcing rib and the connecting block on the first side of the support plate.

[0016] Furthermore, a plurality of mating blocks 2 are provided on the first side of the cover plate, and a slot is provided at the center of the mating block 2;

[0017] After the support plate and the cover plate are fastened together, each reinforcing rib is inserted into the space between the corresponding mating block one and mating block two.

[0018] Furthermore, the length of the threaded rod protruding from the first side of the support plate is less than the depth of the groove.

[0019] Furthermore, the cover plate and the support plate have the same external dimensions.

[0020] Furthermore, the second side of the support plate near the vibration damping mechanism is a flat plane. In summary, this invention has the following beneficial effects:

[0021] 1. By setting a flat cover plate to cover the support plate and matching it with a corresponding connecting structure, the two plates can be made into a whole, reducing the internal hollow space, thereby improving the structural rigidity and stability of the device, suppressing deformation during use, ensuring the flatness of the connecting surface and the assembly accuracy, enhancing the vibration reduction effect and extending the service life of the device.

[0022] 2. By setting threaded rods to connect with corresponding connecting holes, precise positioning and firm assembly of each component can be achieved, improving connection stability and structural integrity. At the same time, it facilitates installation, disassembly and subsequent maintenance. By setting four springs evenly installed between the two support plates, and with two dampers on the inner side of each spring, a symmetrical and balanced elastic support and energy-dissipating vibration reduction structure can be formed, ensuring uniform transmission and absorption of vibration loads, and greatly improving the comprehensiveness and stability of vibration reduction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure in this embodiment;

[0024] Figure 2 This is a three-dimensional structural diagram of the supporting component in this embodiment;

[0025] Figure 3 This is a three-dimensional structural diagram of the support plate in this embodiment;

[0026] Figure 4 This is a three-dimensional structural diagram of the vibration damping component in this embodiment;

[0027] Figure 5 This is a three-dimensional structural diagram of the cover plate in this embodiment;

[0028] Figure 6 This is a three-dimensional structural diagram of the positioning mechanism in this embodiment;

[0029] Figure 7 This is a three-dimensional structural diagram of the connection between the vibration damping mechanism and the support mechanism in this embodiment.

[0030] In the figure, 1. Support component; 101. Support plate; 102. Connecting block; 103. Reinforcing rib; 104. Locking block; 105. Connecting hole; 106. Cover plate; 107. Connecting block one; 108. Groove; 109. Connecting block two; 110. Slot; 2. Vibration damping mechanism; 201. Connecting rod; 202. Damper; 203. Threaded rod; 204. Spring; 3. Positioning mechanism; 301. Base; 302. Bracket; 303. Steam turbine body. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0033] Reference Figure 1-7 As shown, a vibration damping device for a thermal power turbine is provided in a preferred embodiment of the present invention. It includes a support mechanism, a vibration damping mechanism 2 installed on the inner side of the support mechanism, and a positioning mechanism 3 of the thermal power turbine fixedly connected to the upper end of the support mechanism.

[0034] The support mechanism includes two support components 1, respectively disposed at both ends of the vibration damping mechanism 2. Each support component 1 includes a support plate 101 and a cover plate 106 of the same external dimensions that are interlocked. In each support component 1, the support plate 101 is closer to the vibration damping mechanism 2 than the cover plate 106. The second side of the cover plate 106 away from the support plate 101 is a flat plane, providing a flat connection surface for the connection between the vibration damping device and the turbine.

[0035] A locking block is provided at the center of the first side of the support plate 101 away from the vibration damping mechanism 2, and a connecting hole is provided at the corner of the first side of the support plate 101. A circular groove is provided on the first side of the cover plate 106 facing the support plate 101, opposite to each connecting hole, and the diameter of the groove is larger than the diameter of the connecting hole. A slot is provided at the center of the first side of the cover plate 106; after the support plate 101 and the cover plate 106 are fastened together, each groove is coaxial with the corresponding connecting hole, and each locking block is inserted into the corresponding slot.

[0036] Specifically, such as Figure 3 and 7 As shown, the second side of the support plate 101 near the vibration damping mechanism 2 is a flat plane, and a protruding connecting block 102 is provided in the middle of the first side away from the vibration damping mechanism 2. Multiple reinforcing ribs 103 protruding relative to the first side of the support plate are connected to the outer ends of the connecting block 102. A cylindrical locking block 104 is provided between two adjacent reinforcing ribs 103. A connecting hole 105 is provided through the corner formed by the outer side of the reinforcing rib 103 without adjacent reinforcing ribs and the connecting block 102. Figure 3 As shown, the support plate 101 has four connecting holes 105 located at the four corners of the support plate 101.

[0037] like Figure 5As shown, on the first side of the cover plate 106 facing the support plate 101, there is a protruding mating block 107 positioned opposite each connecting hole 105. A circular groove 108 is located at the center of each mating block 107, with a diameter larger than the diameter of the connecting hole 105. After the support plate 101 and the cover plate 106 are engaged, each mating block 107 is inserted into the corner formed by the corresponding reinforcing rib 103 and connecting block 102 on the first side of the support plate 101. Each groove 108 is coaxial with the corresponding connecting hole 105. Multiple mating blocks 2 109 are provided on the first side of the cover plate 106. A slot 110 is located at the center of each mating block 2 109. After the support plate 101 and the cover plate 106 are engaged, each reinforcing rib 103 is inserted into the space between the corresponding mating blocks 107 and 2 109, and each slot 104 is inserted into the corresponding slot 110, achieving a snap-fit ​​connection. By setting a flat cover plate 106 to cover the support plate 101 and matching it with a corresponding connecting structure, the two plates can be integrated, reducing the internal hollow space, thereby improving the structural rigidity and stability of the device, suppressing deformation during use, ensuring the flatness of the connecting surface and the assembly accuracy, enhancing the vibration reduction effect and extending the service life of the device.

[0038] Reference Figure 1 and Figure 7 As shown, the vibration damping mechanism 2 includes multiple vibration damping components arranged symmetrically. Figure 4 As shown, each vibration damping component includes a connecting rod 201. A damper 202 passes through each of the two ends of the connecting rod 201 and is movably connected to it. Threaded rods 203 are connected to both ends of the connecting rod 201. A spring 204 is mounted on the outer side of both the connecting rod 201 and the damper 202 on the connecting rod 201. The elastic support of the spring 204 absorbs the vibration energy generated by the turbine operation and buffers the impact load. The energy dissipation characteristics of the damper 202 attenuate the vibration amplitude and suppress resonance. The synergistic effect of these two components significantly improves the vibration damping efficiency of the device, stably controls vibration transmission, and ensures the smooth operation of the turbine.

[0039] Reference Figure 1 and Figure 6 As shown, the positioning mechanism 3 includes a base 301, with supports 302 on the left and right sides of the upper end of the base 301, and the turbine body 303 is mounted between the two supports 302. The bottom surface of the base 301 is flat, and the bottom surface of the base 301 is fixedly connected (e.g., welded) to the second side of the cover plate 103 at the upper end of the vibration damping mechanism 2. By setting the base 301, the turbine can be stably positioned, the load can be distributed, and the rigidity can be enhanced, ensuring the stable and reliable operation of the turbine.

[0040] Reference Figure 1 and Figure 7As shown, the threaded rod 203 is inserted into the corresponding connecting hole 105. The vibration damping assembly is installed between the two support plates 101 via the connection of the nut and the threaded rod 203. The length of the threaded rod 203 protruding from the first side of the support plate 101 is less than the depth of the groove 108, ensuring that the end of the threaded rod 203 is completely accommodated in the groove 108. By setting the threaded rod 203 to correspond with the connecting hole 105, precise positioning and secure assembly of each component can be achieved, improving connection stability and structural integrity, while also facilitating installation, disassembly, and subsequent maintenance. By symmetrically arranging multiple springs 204 between the two support plates 101, and with two dampers 202 inside each spring 204, a symmetrical and balanced elastic support and energy-dissipating vibration damping structure can be formed, ensuring uniform transmission and absorption of vibration loads, significantly improving the comprehensiveness and stability of vibration damping.

[0041] Specific implementation process: During operation, the vibration load generated by the turbine is transmitted to the support plate 101 through the base 301 and the cover plate 106, and then to each spring 204. The spring 204 elastically supports and absorbs the vibration energy and buffers the impact load. At the same time, the two dampers 202 inside each spring 204 attenuate the vibration amplitude and suppress resonance through energy dissipation characteristics, ultimately achieving efficient vibration reduction and ensuring stable operation of the device.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vibration damping device for a thermal power steam turbine, characterized in that: Includes a support mechanism, and a vibration damping mechanism is installed on the inner side of the support mechanism; The support mechanism includes two support components, which are respectively disposed at both ends of the vibration damping mechanism; each support component includes a support plate and a cover plate that are interlocked with each other, and the support plate is closer to the vibration damping mechanism than the cover plate; A locking block is provided at the center of the first side of the support plate away from the vibration damping mechanism, and a connecting hole is provided at the corner of the first side; a circular groove is provided on the first side of the cover plate facing the support plate, opposite to each connecting hole, and the diameter of the groove is larger than the diameter of the connecting hole; a slot is provided at the center of the first side of the cover plate; after the support plate and the cover plate are fastened together, each groove is coaxial with the corresponding connecting hole, and each locking block is inserted into the corresponding slot; The second side of the cover plate away from the support plate is a flat plane, and the second side of the cover plate at the upper end of the support mechanism is fixedly connected to the positioning mechanism of the thermal power turbine.

2. The vibration damping device for a thermal power turbine according to claim 1, characterized in that: The vibration damping mechanism includes a plurality of vibration damping components arranged symmetrically. Each vibration damping component includes a connecting rod. A damper passes through each of the two ends of the connecting rod and is movably connected to it. Threaded rods are connected to both ends of the connecting rod. A spring is fitted on the outer side of the connecting rod and the damper on the connecting rod. The threaded rod is inserted into the corresponding connecting hole on each of the support plates.

3. The vibration damping device for a thermal power turbine according to claim 1, characterized in that: The positioning mechanism includes a base, with supports on the left and right sides of the upper end of the base, and a steam turbine body is mounted between the two supports.

4. The vibration damping device for a thermal power turbine according to claim 1, characterized in that: A protruding connecting block is provided in the middle of the first side of the support plate. Multiple reinforcing ribs protruding relative to the first side of the support plate are connected to the outer ends of the connecting block. A locking block is provided between two adjacent reinforcing ribs. The connecting hole is provided through the corner formed by the outer side of the reinforcing rib without adjacent reinforcing ribs and the connecting block.

5. A vibration damping device for a thermal power turbine according to claim 4, characterized in that: On the first side of the cover plate, a protruding mating block is provided at a position opposite to each of the connecting holes, and a groove is provided at the center of the mating block. After the support plate and the cover plate are fastened together, each mating block is inserted into the corner formed by the reinforcing rib and the connecting block on the first side of the support plate.

6. The vibration reduction device for a thermal power steam turbine according to claim 5, characterized in that: The cover plate has a plurality of docking blocks 2 on its first side, and the slot is provided at the center of the docking block 2; After the support plate and the cover plate are fastened together, each of the reinforcing ribs is inserted into the space between the mating block one and the mating block two, which are opposite to each other.

7. A vibration damping device for a thermal power turbine according to claim 2, characterized in that: The length of the threaded rod protruding from the first side of the support plate is less than the depth of the groove.

8. The vibration damping device for a thermal power turbine according to claim 1, characterized in that: The cover plate has the same outer dimensions as the support plate.

9. A vibration damping device for a thermal power steam turbine according to claim 1, characterized in that: The second side of the support plate near the vibration damping mechanism is a flat plane.

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