Turbine blade strength detection device

Abstract

The utility model relates to the technical field of steam turbine blade detection, and discloses a steam turbine blade strength detection device which comprises a bottom plate, a vertical plate fixedly connected to the top of the bottom plate, a top plate fixedly connected to the top of the vertical plate, an open groove formed in the top of the bottom plate, and a first screw rod rotationally connected to the inner wall of the open groove, one end of the first screw rod is fixedly connected with a turntable; according to the utility model, not only can longitudinal bending detection and rotation detection be carried out on the blade, but also the strength of one end of the blade can be detected in a targeted manner when the device is used, in addition, the flatness of the blade can be increased when the blade is clamped by the device, and the problem that part of existing devices are inconvenient to use when being used is solved. The problems that in the prior art, the strength of the end, away from a connecting part, of a blade is difficult to detect in a targeted mode, the detection effect is poor, and after one-time use is completed, workers are difficult to accurately adjust the levelness of a clamping block, so that the follow-up blade detection effect is prone to being affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine blade detection, in particular to a steam turbine blade strength detection device. Background Art

[0002] Steam turbine blades are the general term for steel used for moving and stationary blades in steam turbines. Blades are key parts of steam turbines and one of the most delicate and important parts. Their aerodynamic performance, processing geometry, surface roughness, installation clearance, operating conditions, scaling and other factors all affect the efficiency and output of the steam turbine. Their structural design, vibration intensity and operating mode have a decisive influence on the safety and reliability of the unit. Toughness is a comprehensive indicator that reflects the strength and plasticity of a material. Materials with good toughness have higher strength and better plasticity. The key to toughness is a good combination of strength and ductility toughness.

[0003] After searching, it is found that a steam turbine blade toughness test device is disclosed in Chinese patent documents [Application number: CN202220379656.9; Publication number: CN217212016U]. This steam turbine blade toughness test device includes: a main module, a fixed module and a test module. The main module includes a bottom plate and a side plate fixed to the top of the bottom plate. The bottom plate is used to install the fixed module, and the side plate is used to install the test module. The fixed module includes a main fixed plate arranged on one side of the main module, a connecting block integrally fixed to the bottom end of the main fixed plate, a moving component arranged in the inner cavity of the main module and extending out of the main module and connected to the connecting block, a clamping block symmetrically arranged on the vertical side of the main fixed plate, and an adjusting component arranged in the inner cavity of the main fixed plate and connected to the clamping block. The main fixed plate is used to install the clamping block, and the connecting block is installed at the bottom end of the main fixed plate for moving with the main fixed plate.

[0004] The device disclosed in the patent can detect the toughness of the blade when in use. However, after a long period of use, the end of the blade away from the connection part is susceptible to damage due to air flow, etc. Therefore, before the turbine blades are put into use, the staff needs to sample and test each batch of turbine blades, especially the strength of the end of the blade away from the connection part, to ensure its effect in subsequent use. However, when the device is in use, it is difficult to achieve targeted detection of the strength of the end of the blade away from the connection part, so the device has certain limitations when in use;

[0005] In addition, after the device is used once, the angle position of the clamping block will be adjusted after the clamping block rotates with the auxiliary fixed plate. Subsequent staff will need to use additional tools to adjust the angle of the clamping block. This process is rather cumbersome. If it is judged by the naked eye, it will affect the accuracy of the clamping block angle after adjustment. Utility Model Content

[0006] The utility model aims to provide a steam turbine blade strength detection device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a steam turbine blade strength detection device, comprising a bottom plate, a vertical plate fixedly connected to the top of the bottom plate, and a top plate fixedly connected to the top of the vertical plate, and also comprising:

[0008] A slot is provided on the top of the bottom plate and a first screw rod is rotatably connected to the inner wall of the slot, one end of the first screw rod is fixedly connected to a turntable, a surface thread sleeve of the first screw rod is provided with a movable plate, a surface of the movable plate is fixedly connected to a support plate and provided with a slot, a bottom of the inner wall of the slot is rotatably connected to a second screw rod, a handle is fixedly connected to the top of the second screw rod, and a pressing plate is provided on the surface thread sleeve of the second screw rod;

[0009] A linear guide rail installed on the surface of the vertical plate and a rectangular plate fixedly connected to the surface of the linear guide rail slide seat, the surface of the rectangular plate is rotatably penetrated by a rotating drum and is equipped with an auxiliary rotating mechanism, the surface of the rotating drum is fixedly connected with a fixed platform and a hollow ring, the surface of the fixed platform is equipped with a clamping mechanism, and the surface of the hollow ring is rotatably connected to the surface of the rectangular plate;

[0010] A vertical plate is fixedly connected to the top of the top plate, an auxiliary lifting mechanism is installed on the surface of the vertical plate, a slapping mechanism is arranged on the top of the top plate, and a guide rod is fixedly passed through the top of the top plate.

[0011] Preferably, the clamping mechanism comprises a rotating ring rotatably connected to the bottom of the fixed platform, an adjusting screw fixedly connected to the bottom of the rotating ring, and a clamping frame slidably passing through the fixed platform, and the adjusting screw thread passes through the bottom of the clamping frame.

[0012] Preferably, the auxiliary rotation mechanism includes a first motor fixedly connected to the surface of the rectangular plate, a rotating shaft rotating through the rectangular plate, a gear plate fixedly connected to the rotating shaft, and a gear ring fixedly sleeved on the surface of the rotating drum, one end of the rotating shaft is fixedly connected to the output shaft of the first motor, and the gear ring is meshed with the gear plate.

[0013] Preferably, a limiting rod is fixedly connected to the surface of the gear ring, a limiting groove is provided on the surface of the rectangular plate, and the surface of the limiting rod is in contact with the inner wall of the limiting groove.

[0014] Preferably, the auxiliary lifting mechanism includes a second motor fixedly connected to the surface of the vertical plate, a connecting rod rotating through the vertical plate, and a cam fixedly connected to the rotating shaft, and one end of the connecting rod is fixedly connected to the output shaft of the second motor.

[0015] Preferably, the beating mechanism includes a sliding rod sliding through the guide rod, a lifting plate fixedly connected to the top of the sliding rod, a beating plate fixedly connected to the bottom of the sliding rod, and a compression spring sleeved on the surface of the sliding rod, the two ends of the compression spring are respectively fixedly connected to the bottom of the lifting plate and the top of the top plate, and the surface of the cam is in contact with the top of the lifting plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The utility model can not only perform longitudinal bending detection on the blades, but also perform rotation detection on the blades. At the same time, when the device is in use, it can also specifically detect the strength of one end of the blade to improve the effect of detecting the blades. In addition, when the device is in use, it can also increase the flatness of the blades when clamping the blades to ensure the normal progress of subsequent detection operations. This solves the problem that some existing devices are difficult to perform targeted detection of the strength of the end of the blade away from the connecting part when in use, resulting in poor detection effect, and after one use, it is difficult for the staff to accurately adjust the horizontality of the clamping block, which can easily affect the subsequent blade detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the utility model;

[0020] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0021] Figure 4 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model after partial disassembly;

[0023] Figure 6 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the utility model.

[0024] In the figure: 1. bottom plate; 2. first screw rod; 3. moving plate; 4. supporting plate; 5. second screw rod; 6. pressure plate; 7. vertical plate; 8. linear guide rail; 9. rectangular plate; 10. rotating drum; 11. fixed table; 12. clamping mechanism; 121. rotating ring; 122. adjusting screw rod; 123. clamping frame; 13. auxiliary rotating mechanism; 131. first motor; 132. rotating shaft; 133. gear plate; 134. gear ring; 14. limiting rod; 15. limiting groove; 16. hollow ring; 17. top plate; 18. auxiliary lifting mechanism; 181. second motor; 182. connecting rod; 183. cam; 19. flapping mechanism; 191. sliding rod; 192. lifting plate; 193. flapping plate; 194. compression spring; 20. guide rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6As shown, a steam turbine blade strength detection device comprises a bottom plate 1, a vertical plate 7 fixedly connected to the top of the bottom plate 1, and a top plate 17 fixedly connected to the top of the vertical plate 7. A groove is provided on the top of the bottom plate 1, and a first screw rod 2 is rotatably connected to the inner wall of the groove. One end of the first screw rod 2 rotates and penetrates through the surface of the bottom plate 1 and is fixedly connected to a turntable. A movable plate 3 is threadedly sleeved on the surface of the first screw rod 2. A support plate 4 is fixedly connected to the upper surface of the movable plate 3 and is provided with a groove. A second screw rod 5 is rotatably connected to the bottom of the inner wall of the groove. The top of the second screw rod 5 rotates and penetrates through the top of the movable plate 3 and is fixedly connected to a handle. A pressure plate 6 is threadedly sleeved on the surface of the second screw rod 5. The surfaces of the movable plate 3 and the pressure plate 6 are slidably connected to the inner walls of the groove and the groove respectively. A linear guide rail 8 is installed on the surface of the vertical plate 7. The surface of the slide seat of the linear guide rail 8 is fixedly connected to a rectangular guide rail. shaped plate 9, a rotating drum 10 is rotatably penetrated on the surface of the rectangular plate 9, a fixed platform 11 is fixedly connected to the lower part of the surface of the rotating drum 10, a clamping mechanism 12 is installed on the surface of the fixed platform 11, an auxiliary rotating mechanism 13 is installed on the upper part of the surface of the rectangular plate 9, a hollow ring 16 is fixedly connected to the surface of one side of the rotating drum 10, the surface of the hollow ring 16 is rotatably connected to the surface of the rectangular plate 9, and the position of the rotating drum 10 can be limited by the hollow ring 16, a vertical plate is fixedly connected to the top of the top plate 17, an auxiliary lifting mechanism 18 is installed on the surface of the vertical plate, a flapping mechanism 19 is arranged on the top of the top plate 17, the auxiliary lifting mechanism 18 is used in conjunction with the flapping mechanism 19, and one end of the turbine blade can be flapped for detection through the flapping mechanism 19, a guide rod 20 is fixedly penetrated on the top of the top plate 17, and the height of the guide rod 20 is greater than the height of the top plate 17.

[0027] The clamping mechanism 12 includes a rotating ring 121, an adjusting screw rod 122 and a clamping frame 123. The rotating ring 121 is rotatably connected to the bottom of the fixed platform 11, the adjusting screw rod 122 is fixedly connected to the bottom of the rotating ring 121, the clamping frame 123 slides through the fixed platform 11, and the adjusting screw rod 122 is threaded through the bottom of the clamping frame 123. When the staff rotates the rotating ring 121, the adjusting screw rod 122 rotates accordingly to adjust the height of the clamping frame 123, thereby facilitating the clamping of the blade.

[0028] The auxiliary rotating mechanism 13 includes a first motor 131, a rotating shaft 132, a gear plate 133 and a gear ring 134. The first motor 131 is fixedly connected to the surface of the rectangular plate 9. One end of the rotating shaft 132 is fixedly connected to the output shaft of the first motor 131. The rotating shaft 132 rotates through the rectangular plate 9. The other end of the rotating shaft 132 is fixedly connected to the surface of the gear plate 133. The gear ring 134 is fixedly sleeved on the surface of the rotating drum 10. The gear ring 134 is meshed with the gear plate 133. When the staff starts the first motor 131, the rotating shaft 132 drives the gear plate 133 to rotate, and the gear ring 134 rotates accordingly to drive the rotating drum 10 to rotate. , so as to rotate the blades, the surface of the gear ring 134 is fixedly connected to the limit rod 14, and the surface of the rectangular plate 9 is provided with a limit groove 15, and the surface of the limit rod 14 contacts the inner wall of the limit groove 15. The limit rod 14 and the limit groove 15 are used in conjunction with each other to limit the rotation angle of the drum 10 to ensure the subsequent use of the device. The limitation on the rotation angle of the drum 10 here refers to limiting the angle of adjustment of the drum 10 after use. The blades used in the steam turbine are made of metal and have a limited rotatable angle. The use of the limit rod 14 and the limit groove 15 will not affect the normal use of the detection operation.

[0029] The auxiliary lifting mechanism 18 includes a second motor 181, a connecting rod 182 and a cam 183. The second motor 181 is fixedly connected to the surface of the vertical plate. The connecting rod 182 rotates and penetrates the vertical plate. One end of the connecting rod 182 is fixedly connected to the output shaft of the second motor 181. The gear plate 133 is fixedly connected to the other end of the rotating shaft 132. The cam 183 is arranged above the flapping mechanism 19.

[0030] The flapping mechanism 19 includes a slide bar 191, a lifting plate 192, a flapping plate 193 and a compression spring 194. The slide bar 191 slides through the guide rod 20, the lifting plate 192 is fixedly connected to the top of the slide bar 191, the flapping plate 193 is fixedly connected to the bottom of the slide bar 191, and the compression spring 194 is sleeved above the surface of the slide bar 191. The two ends of the compression spring 194 are respectively fixedly connected to the bottom of the lifting plate 192 and the top of the top plate 17. The surface of the cam 183 contacts the top of the lifting plate 192. The staff starts the second motor 181, and the connecting rod 182 drives the cam 183 to rotate and contact the top of the lifting plate 192. At this time, with the cooperation of the elastic force of the compression spring 194, the cam 183 can reciprocate to drive the lifting plate 192 to rise and fall, thereby facilitating the flapping plate 193 to reciprocate and flap the top of one end of the blade, thereby detecting the strength of one end of the blade.

[0031] Working principle: after the staff puts the tail of the blade, that is, the part used for connection, on the top of the support plate 4, they can turn the handle, and the handle drives the second screw rod 5 to rotate to adjust the height of the pressure plate 6, so that the tail of the blade can be clamped and fixed by the support plate 4 and the pressure plate 6. Then the staff turns the turntable to drive the movable plate 3 to move through the rotation of the first screw rod 2, so that one end of the blade passes through the clamping frame 123 and the rectangular plate 9. At this time, one end of the blade is located below the flapping plate 193. The staff turns the rotating ring 121, and the adjusting screw rod 122 rotates accordingly to adjust the height of the clamping frame 123. In this way, the blade is clamped and fixed by the coordinated use of the clamping frame 123 and the fixed platform 11, and the clamping operation of the blade is completed accordingly.

[0032] The staff starts the second motor 181, and the slide bar 191 drives the beating plate 193 to rise and fall, thereby beating the top of one end of the blade. Based on this, the staff can test the strength of one end of the blade, and the test data can be judged according to the number of beatings;

[0033] Thereafter, the staff can start the linear guide rail 8, and the rectangular plate 9 will then descend, so that the blades can be bent longitudinally through the fixed platform 11 and the clamping mechanism 12, and the toughness and strength of the blades can be tested. After the test is completed, the staff starts the first motor 131, and the ring gear 134 will then drive the rotating drum 10 to rotate, which can drive the blades to rotate, so as to further test the strength and toughness of the blades.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants 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, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] 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 steam turbine blade strength detection device, comprising a bottom plate (1), a vertical plate (7) fixedly connected to the top of the bottom plate (1), and a top plate (17) fixedly connected to the top of the vertical plate (7), characterized in that: Also includes: A first screw rod (2) is provided with a slot at the top of the bottom plate (1) and is rotatably connected to the inner wall of the slot; one end of the first screw rod (2) is fixedly connected to a rotating disk; a movable plate (3) is threadedly sleeved on the surface of the first screw rod (2); a support plate (4) is fixedly connected to the surface of the movable plate (3) and is provided with a slot; a second screw rod (5) is rotatably connected to the bottom of the inner wall of the slot; a handle is fixedly connected to the top of the second screw rod (5); and a pressing plate (6) is threadedly sleeved on the surface of the second screw rod (5); A linear guide rail (8) is mounted on the surface of the vertical plate (7), and a rectangular plate (9) is fixedly connected to the surface of the slide seat of the linear guide rail (8); a rotating drum (10) is rotatably penetrated through the surface of the rectangular plate (9) and an auxiliary rotating mechanism (13) is installed on the surface of the rotating drum (10); a fixed platform (11) and a hollow ring (16) are fixedly connected to the surface of the fixed platform (11); a clamping mechanism (12) is installed on the surface of the hollow ring (16); and the surface of the rectangular plate (9) is rotatably connected; A vertical plate is fixedly connected to the top of the top plate (17), an auxiliary lifting mechanism (18) is installed on the surface of the vertical plate, a beating mechanism (19) is arranged on the top of the top plate (17), and a guide rod (20) is fixedly passed through the top of the top plate (17).

2. A steam turbine blade strength detection device according to claim 1, characterized in that: The clamping mechanism (12) comprises a rotating ring (121) rotatably connected to the bottom of the fixed platform (11), an adjusting screw rod (122) fixedly connected to the bottom of the rotating ring (121), and a clamping frame (123) slidably passing through the fixed platform (11), wherein the adjusting screw rod (122) is threadedly passed through the bottom of the clamping frame (123).

3. A steam turbine blade strength detection device according to claim 1, characterized in that: The auxiliary rotating mechanism (13) comprises a first motor (131) fixedly connected to the surface of the rectangular plate (9), a rotating shaft (132) that rotates and passes through the rectangular plate (9), a gear plate (133) fixedly connected to the rotating shaft (132), and a gear ring (134) fixedly sleeved on the surface of the rotating drum (10), one end of the rotating shaft (132) being fixedly connected to the output shaft of the first motor (131), and the gear ring (134) being meshed with the gear plate (133).

4. A steam turbine blade strength detection device according to claim 3, characterized in that: The surface of the gear ring (134) is fixedly connected to a limiting rod (14), the surface of the rectangular plate (9) is provided with a limiting groove (15), and the surface of the limiting rod (14) is in contact with the inner wall of the limiting groove (15).

5. A steam turbine blade strength detection device according to claim 1, characterized in that: The auxiliary lifting mechanism (18) comprises a second motor (181) fixedly connected to the surface of the vertical plate, a connecting rod (182) rotatably penetrating the vertical plate, and a cam (183) fixedly connected to the rotating shaft (132); one end of the connecting rod (182) is fixedly connected to the output shaft of the second motor (181).

6. A steam turbine blade strength detection device according to claim 5, characterized in that: The flapping mechanism (19) comprises a sliding rod (191) slidingly passing through the guide rod (20), a lifting plate (192) fixedly connected to the top of the sliding rod (191), a flapping plate (193) fixedly connected to the bottom of the sliding rod (191), and a compression spring (194) sleeved on the surface of the sliding rod (191), wherein the two ends of the compression spring (194) are respectively fixedly connected to the bottom of the lifting plate (192) and the top of the top plate (17), and the surface of the cam (183) is in contact with the top of the lifting plate (192).

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