Dynamic balance detection device for steam turbine rotor
By introducing a motor-driven screw adjustment system into the turbine rotor dynamic balancing testing device, the problem of inflexible testing caused by the fixed support roller assembly was solved, enabling adaptable testing for different rotors and improving the applicability and accuracy of the testing.
Patent Information
- Application Number
- CN202520755049.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-21
AI Technical Summary
In existing turbine rotor dynamic balancing testing devices, the support roller assembly is fixed and cannot be flexibly adjusted to adapt to rotors of different sizes and lengths, resulting in poor applicability of the test.
A detection device comprising a platform, support base, rollers, belt drive assembly, and laser displacement sensor was designed. The roller spacing and height are adjusted by a motor-driven forward and reverse screw and threaded rod to achieve adaptive detection for different rotors.
It improves the flexibility and applicability of the inspection, can adapt to rotors of different lengths and diameters, and ensures the accuracy and stability of the inspection.
Smart Images
Figure CN223966202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dynamic balancing testing technology, specifically a steam turbine rotor dynamic balancing testing device. Background Technology
[0002] A steam turbine is a power device that converts the thermal energy of steam into mechanical energy. It drives a generator or other mechanical equipment by utilizing the pressure and temperature difference of steam through a series of blades mounted on a rotor. The turbine rotor is one of the core components of a steam turbine, typically consisting of a shaft, impeller, and blades. When the rotor rotates at high speed, it drives the blades to cut the steam flow, thereby generating mechanical energy. To determine if there is any imbalance in the rotor and to measure the magnitude and location of the imbalance for subsequent correction, a dynamic balancing device is usually used to inspect the rotor. Dynamic balancing inspection refers to the inspection of rotating machinery to ensure that the centrifugal force generated during rotation is evenly distributed, avoiding vibration caused by unbalanced mass. Through dynamic balancing inspection and correction, the rotor's imbalance can be effectively eliminated, reducing mechanical fatigue and noise caused by vibration, thereby improving the stability and service life of the entire unit.
[0003] In the prior art, when a rotor is tested by a dynamic balancing testing device, the support rollers are used to support the rotor. However, since different rotors may have different sizes and lengths, and the support roller assembly is generally set in a fixed position during testing, it is not possible to flexibly adjust the distance between the support rollers to adapt to the length of the rotor. This results in poor applicability of the test and insufficient flexibility. Therefore, in order to solve the above problems, a turbine rotor dynamic balancing testing device is proposed. Utility Model Content
[0004] The purpose of this utility model is to provide a turbine rotor dynamic balancing testing device to solve the problem mentioned in the background art that different rotors may have different sizes and lengths, and the roller support assembly is generally set in a fixed position during testing, which makes it impossible to flexibly adjust the distance between the rollers to adapt to the length of the rotor, resulting in poor applicability of the test and insufficient flexibility in the test.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a turbine rotor dynamic balancing testing device, comprising a platform, the platform comprising a testing platform, a support seat provided on the upper surface of the testing platform, a support roller provided on the surface of the support seat, a support plate fixedly connected to the upper surface of the testing platform, a belt drive assembly provided on the surface of the support plate, a connecting frame fixedly connected to the upper surface of the testing platform, and a laser displacement sensor fixedly installed on the surface of the connecting frame;
[0006] The inner side of the testing platform is provided with a displacement mechanism, which includes a first movable groove. The first movable groove is opened on the inner side of the testing platform, and a positive and negative screw is movably connected to the inner side of the first movable groove. A first motor is fixedly installed on the surface of the testing platform, and a moving block is fixedly connected to the bottom end of the support base.
[0007] Preferably, the displacement mechanism further includes a fixing plate, which is fixedly connected to the upper surface of the detection table, and a fixing rod is fixedly connected to the surface of the support base, with the fixing rod and the fixing plate being movably connected.
[0008] Preferably, the positive and negative screws are fixedly connected to the output end of the first motor, and the moving block is movably connected to the positive and negative screws via threads, with the moving block moving inside the first movable groove.
[0009] Preferably, an adjustment mechanism is provided on the inner side of the support base. The adjustment mechanism includes a second movable groove, which is opened on the inner side of the support base. A connecting block is movably connected to the inner side of the second movable groove. A connecting plate is fixedly connected to the surface of the connecting block. The support roller and the connecting plate are movably connected. A threaded rod is movably connected to the inner side of the second movable groove. A second motor is fixedly installed at the top of the support base. A limit rod is fixedly connected to the inner surface of the second movable groove.
[0010] Preferably, the threaded rod and the support seat are movably connected, and the threaded rod and the output end of the second motor are fixedly connected.
[0011] Preferably, one set of the connecting blocks is movably connected by threads and a threaded rod, and the other set of the connecting blocks is movably connected to a limiting rod.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. The first motor drives the forward and reverse screws to rotate, which moves the moving block and causes the support base to shift, thus changing the distance between the rollers. During the testing process, by adjusting the positions of the support base and the rollers, the position of the rollers can be adapted to rotors of different lengths, which helps to improve the applicability of the testing and makes the testing more flexible.
[0014] 2. The second motor drives the threaded rod to rotate, which enables the connecting block to move vertically. This, in turn, causes the connecting plate to move the support roller, allowing the rotor to be raised or lowered. As a result, during the testing process, when rotors of different diameters are tested, they can make good contact with the surface of the belt drive assembly, ensuring transmission. Attached Figure Description
[0015] Figure 1This is a front view schematic diagram of the structure of this utility model;
[0016] Figure 2 This is an exploded side view sectional view of the structure of this utility model;
[0017] Figure 3 This is a frontal sectional view of the structure of this utility model;
[0018] Figure 4 This is an exploded side view sectional view of the support base and connecting plate of this utility model.
[0019] In the diagram: 1. Testing table; 11. Support base; 12. Roller; 13. Support plate; 14. Belt drive assembly; 15. Connecting frame; 16. Laser displacement sensor; 2. First movable slot; 21. Positive and negative screws; 22. First motor; 23. Moving block; 24. Fixed plate; 25. Fixed rod; 3. Second movable slot; 31. Connecting block; 32. Connecting plate; 33. Threaded rod; 34. Second motor; 35. Limiting rod. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-4 One embodiment provided by this utility model:
[0022] The laser displacement sensor 16, the first motor 22, and the second motor 34 used in this application are products that can be purchased directly from the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.
[0023] A turbine rotor dynamic balancing testing device includes a platform, which includes a testing platform 1. A support base 11 is provided on the upper surface of the testing platform 1, and a support roller 12 is provided on the surface of the support base 11. A support plate 13 is fixedly connected to the upper surface of the testing platform 1, and a belt drive assembly 14 is provided on the surface of the support plate 13. A connecting frame 15 is fixedly connected to the upper surface of the testing platform 1, and a laser displacement sensor 16 is fixedly installed on the surface of the connecting frame 15. The support roller 12 can support the rotor, and the belt drive assembly 14 can drive the rotor, enabling the belt drive assembly 14 to rotate. The laser displacement sensor 16 can accurately capture vibration signals, thereby enabling the measurement of minute displacements on the rotor surface.
[0024] The inner side of the testing table 1 is provided with a displacement mechanism, which includes a first movable groove 2. The first movable groove 2 is opened on the inner side of the testing table 1. A positive and negative screw 21 is movably connected to the inner side of the first movable groove 2. A first motor 22 is fixedly installed on the surface of the testing table 1. A moving block 23 is fixedly connected to the bottom end of the support base 11. By rotating the positive and negative screw 21, the moving block 23 can drive the support base 11 to move, thereby adjusting the distance between the left and right end rollers 12, so that the spacing of the rollers 12 can be adapted to rotors of different lengths during testing.
[0025] Furthermore, the displacement mechanism also includes a fixed plate 24, which is fixedly connected to the upper surface of the detection table 1. A fixed rod 25 is fixedly connected to the surface of the support base 11. The fixed rod 25 and the fixed plate 24 are movably connected. Through the cooperation of the fixed plate 24 and the fixed rod 25, the support base 11 can be limited, which can ensure that the support base 11 can move horizontally stably.
[0026] Furthermore, the positive and negative screws 21 are fixedly connected to the output end of the first motor 22, and the moving block 23 is movably connected to the positive and negative screws 21 through threads. The moving block 23 moves inside the first movable groove 2. By setting the moving block 23, the movement of the moving block 23 can drive the support base 11 to move accordingly, thereby facilitating the adjustment of the spacing of the support base 11.
[0027] Furthermore, an adjustment mechanism is provided on the inner side of the support base 11. The adjustment mechanism includes a second movable groove 3, which is opened on the inner side of the support base 11. A connecting block 31 is movably connected to the inner side of the second movable groove 3. A connecting plate 32 is fixedly connected to the surface of the connecting block 31. The roller 12 and the connecting plate 32 are movably connected. A threaded rod 33 is movably connected to the inner side of the second movable groove 3. A second motor 34 is fixedly installed at the top of the support base 11. A limit rod 35 is fixedly connected to the inner surface of the second movable groove 3. The second motor 34 drives the threaded rod 33 to rotate, so that the connecting block 31 can move vertically in the second movable groove 3. This enables the connecting plate 32 to drive the roller 12 to rise and fall, which facilitates the adjustment of the rotor height. This ensures that the rotor can maintain good contact with the belt drive assembly 14 when testing rotors of different diameters.
[0028] Furthermore, the threaded rod 33 and the support base 11 are movably connected, and the output end of the threaded rod 33 and the second motor 34 are fixedly connected. By rotating the threaded rod 33, the connecting block 31 can drive the connecting plate 32 to move vertically, which in turn facilitates the vertical movement of the support roller 12, thereby adjusting the position and height of the rotor.
[0029] Furthermore, one set of connecting blocks 31 is movably connected to the threaded rod 33 via threads, and another set of connecting blocks 31 is movably connected to the limiting rod 35. By setting the limiting rod 35, the connecting blocks 31 can be limited, which can prevent the connecting blocks 31 from shifting and facilitate the connecting blocks 31 to drive the connecting plate 32 and the support roller 12 to move vertically in a stable manner.
[0030] Working principle: In use, the first motor 22 is electrically connected to an external power source. The operator starts the first motor 22 by pressing the switch. The first motor 22 drives the positive and negative screws 21 to rotate. The moving block 23 will move in the first movable groove 2 under the action of the positive and negative screws 21. Then, the support base 11 moves under the action of the moving block 23, and the fixed rod 25 moves in the fixed plate 24, which can adjust the distance of the support roller 12.
[0031] The second motor 34 is electrically connected to an external power source. The operator starts the second motor 34 by pressing a switch. The second motor 34 drives the threaded rod 33 to rotate, which allows the connecting block 31 to move inside the second movable groove 3 under the action of the threaded rod 33. Another set of connecting blocks 31 moves on the surface of the limiting rod 35, and then the connecting plate 32 moves vertically under the action of the connecting block 31, which can adjust the height position of the rotor.
[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A steam turbine rotor dynamic balance detection device, comprising a table body, the table body comprising a detection table (1), the upper surface of the detection table (1) is provided with a support seat (11), the surface of the support seat (11) is provided with a supporting wheel (12), the upper surface of the detection table (1) is fixedly connected with a support plate (13), the surface of the support plate (13) is provided with a belt drive assembly (14), the upper surface of the detection table (1) is fixedly connected with a connecting frame (15), the surface of the connecting frame (15) is fixedly installed with a laser displacement sensor (16); characterized in that The inner side of the detection table (1) is provided with a displacement mechanism, the displacement mechanism comprises a first movable slot (2), the first movable slot (2) is opened in the inner side of the detection table (1), the inner side of the first movable slot (2) is movably connected with a reversible screw rod (21), the surface of the detection table (1) is fixedly installed with a first motor (22), the bottom end of the support seat (11) is fixedly connected with a moving block (23).
2. A device for detecting dynamic balancing of a steam turbine rotor according to claim 1, characterized in that: The displacement mechanism further comprises a fixed plate (24), the fixed plate (24) is fixedly connected to the upper surface of the detection table (1), the surface of the support seat (11) is fixedly connected with a fixed rod (25), the fixed rod (25) and the fixed plate (24) are movably connected.
3. A device for detecting dynamic balancing of a steam turbine rotor according to claim 1, characterized in that: The reversible screw rod (21) and the output end of the first motor (22) are fixedly connected, the moving block (23) is movably connected with the reversible screw rod (21) through threads, and the moving block (23) moves in the inner side of the first movable slot (2).
4. A device for detecting dynamic balancing of a steam turbine rotor according to claim 1, characterized in that: The inner side of the support seat (11) is provided with an adjusting mechanism, the adjusting mechanism comprises a second movable slot (3), the second movable slot (3) is opened in the inner side of the support seat (11), the inner side of the second movable slot (3) is movably connected with a connecting block (31), the surface of the connecting block (31) is fixedly connected with a connecting plate (32), the supporting wheel (12) and the connecting plate (32) are movably connected, the inner side of the second movable slot (3) is movably connected with a threaded rod (33), the top end of the support seat (11) is fixedly installed with a second motor (34), and the inner surface of the second movable slot (3) is fixedly connected with a limiting rod (35).
5. A device for detecting dynamic balancing of a steam turbine rotor according to claim 4, characterized in that: The threaded rod (33) and the support seat (11) are movably connected, and the threaded rod (33) and the output end of the second motor (34) are fixedly connected.
6. A device for detecting dynamic balancing of a steam turbine rotor according to claim 4, characterized in that: A group of the connecting blocks (31) are movably connected with the threaded rod (33) through threads, and another group of the connecting blocks (31) and the limiting rod (35) are movably connected.