Water turbine fault automatic shutdown device
By designing the automatic shutdown device for the failure of the turbine, automatic braking is achieved using the limiting clip and reverse locking thread mechanism, the problem of large shear stress of the rotor drive shaft during the turbine shutdown is solved, extending the service life and simplifying maintenance.
Patent Information
- Application Number
- CN202421104862.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-21
AI Technical Summary
When existing turbines stop braking, the rotor drive shaft is prone to generate large shear stress, resulting in damage and affecting the normal use of the generator.
A water turbine failure automatic shutdown device is designed. It is assembled by the rotary shaft and the control shaft through the drive shaft assembly. It uses the limiting clip and reverse locking thread mechanism to achieve automatic braking, reducing wear between the rotary shaft and the control shaft, and sliding The grooves and slides adjust the bearing support ring to avoid shear stress.
It realizes automatic shutdown in case of failure, reduces wear of drive shaft components, extends service life, and simplifies the disassembly and assembly and replacement of limiting clips to ensure the normal operation of the generator.
Smart Images
Figure CN222296406U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water turbines, in particular to an automatic shutdown device for water turbine failures. Background Art
[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. Most modern water turbines are installed in hydropower stations to drive generators to generate electricity. Various faults often occur during the operation of water turbines, and at this time, the water turbine needs to be shut down urgently for inspection and maintenance. However, when the existing water turbine is shut down and braked, the brake is usually used to hold the brake disc on the rotor drive shaft for braking. However, the inertia transmitted to the drive shaft through the impeller is large. When the brake disc of the rotor drive shaft is directly locked, the rotor drive shaft itself will produce a large shear stress, which makes the drive shaft itself prone to damage, affecting the subsequent normal power generation. For this reason, we propose an automatic shutdown device for water turbine faults. Utility Model Content
[0003] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides an automatic shutdown device for a water turbine failure.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a turbine fault automatic shutdown device, including a sealing cover, a bearing support ring, a generator rotor and a drive shaft assembly, the other end of the drive shaft assembly is rotatably connected to the inner side of the end of the sealing cover through a bearing, one end of the drive shaft assembly is equipped with a runner blade, the drive shaft assembly is assembled from a rotating shaft and a control shaft, one side of the rotating shaft is provided with a limit clamp that cooperates with the control shaft, the periphery of the control shaft is provided with a mirror-symmetrical docking groove, the periphery of the control shaft and the periphery of the limit clamp are both provided with reverse locking threads, the periphery of the control shaft is threadedly connected to the limit screw cover through the reverse locking thread, and the periphery of the limit screw cover is equipped with a first operating handle.
[0005] Preferably, the reverse locking thread is arranged in a direction opposite to the rotation direction of the control shaft.
[0006] Preferably, when the limiting screw cover is rotated in the reverse direction by the first operating handle to approach the rotating shaft, the limiting screw cover is in a limiting locking state for the limiting clamping member through the reverse locking thread;
[0007] Preferably, when the rotating shaft is docked with the end of the control shaft, the end of the rotating shaft is in a limited engagement state with a docking groove inside the control shaft through a limited engagement member.
[0008] Preferably, a sliding groove is provided on the inner side of the sealing cover, and a sliding piece that slides with the inside of the sliding groove is installed on the outer periphery of the bearing support ring. Limiting grooves are provided on the corresponding two sides inside the sliding groove, and both sides of the sliding piece slide with the inside of the limiting groove through a limiting mechanism.
[0009] Preferably, a mounting slot is provided on the periphery of the rotating shaft, and the periphery of the rotating shaft and another part of the periphery of the limiting clamp are provided with threads in the same direction, a limiting ring is sleeved on the periphery of the rotating shaft, and a mounting screw cover is sleeved on the periphery of the rotating shaft through threads in the same direction, and a second operating handle is installed on the periphery of the mounting screw cover;
[0010] Furthermore, the limit clamp is engaged with the mounting slot inside the rotating shaft, and when the mounting screw cover is rotated forwardly by the second operating handle to approach the control shaft, the mounting screw cover is fixed to the limit clamp by the same direction thread.
[0011] Beneficial Effects
[0012] The utility model provides a hydraulic turbine fault automatic shutdown device, which has the following beneficial effects:
[0013] (1) A hydraulic turbine fault automatic shutdown device, in this article, the drive shaft between the generator rotor and the runner blades is changed to a drive shaft assembly, the drive shaft assembly is assembled from a rotating shaft and a control shaft, in a default state, the rotating shaft can be limitedly docked with the docking slot inside the control shaft through multiple sets of limit clamps, and the periphery of the limit clamps and the control shaft are both provided with reverse locking threads, and the periphery of the control shaft is provided with a limit screw cover for locking the limit clamp threads through the reverse locking threads. At this time, the control shaft can drive and control the rotating shaft through the runner blades, and when it is necessary to brake the drive shaft assembly, the first An operating handle controls the limit position of the limit screw cover, so that when the control shaft is driven to rotate, it can automatically unlock and rotate with the limit screw cover, and at the same time, the limit screw cover is rotated away from one side of the rotating shaft. At this time, the rotating shaft can be pulled to the other side through the second operating handle, so that the bearing support ring as a whole can be slid and adjusted inside the sliding groove through the sliding piece. When the limit clamp in the docking groove on the periphery of the control shaft is separated, the rotating shaft itself can have no driving rotation force, so that it gradually stops rotating, reducing the wear between the rotating shaft and the control shaft, thereby reducing the shear wear of the drive shaft assembly itself, ensuring the normal rotation of the generator rotor for power generation, and extending the service life of the drive shaft assembly.
[0014] (2) In the present invention, the limit clamp is docked and installed in the installation slot inside the rotating shaft. When the control shaft is linked by the limit clamp, the second operating handle can be used to control the installation screw cover to rotate and approach the limit clamp inside the installation slot. The outer periphery of the rotating shaft and the limit clamp is provided with the same direction thread. When the installation screw cover is rotated and moved to the position of the limit clamp by the same direction thread, the limit clamp can be locked and fixed. The same is true for disassembly. In this way, the limit clamp inside the installation slot can be easily replaced, thereby achieving the effect of facilitating the disassembly, replacement and use of the limit clamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 For this utility model Figure 1 A magnified view of middle;
[0019] Figure 3 It is a partial schematic diagram of the drive shaft assembly of the utility model;
[0020] Figure 4 For this utility model Figure 1 Enlarged view of middle B;
[0021] Figure 5 It is a partial schematic diagram of the limit clamp of the utility model.
[0022] Legend:
[0023] 1. Sealing cover; 2. Bearing support ring; 3. Generator rotor; 4. Drive shaft assembly; 5. Bearing; 6. Impeller blade; 7. Rotating shaft; 8. Control shaft; 9. Limiting card; 10. Docking card slot; 11. Reverse locking thread; 12. Limiting screw cover; 13. First operating handle; 14. Slide; 15. Slide; 16. Limiting slot; 17. Limiting mechanism; 18. Installation card slot; 19. Same direction thread; 20. Limiting ring; 21. Installation screw cover; 22. Second operating handle. DETAILED DESCRIPTION
[0024] 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.
[0025] Embodiment: A hydraulic turbine fault automatic shutdown device, such as Figure 1-Figure 5 As shown, it includes a sealing cover 1, a bearing support ring 2, a generator rotor 3 and a drive shaft assembly 4. The other end of the drive shaft assembly 4 is rotatably connected to the inner side of the end of the sealing cover 1 through a bearing 5, and a runner blade 6 is installed at one end of the drive shaft assembly 4;
[0026] The difference is that the drive shaft assembly 4 is assembled from a rotating shaft 7 and a control shaft 8, a limit clamp 9 is provided on one side of the rotating shaft 7 and is linked with the control shaft 8, a mirror-symmetrical docking slot 10 is provided on the periphery of the control shaft 8, a reverse locking thread 11 is provided on the periphery of the control shaft 8 and the peripheral part of the limit clamp 9, the periphery of the control shaft 8 is threadedly connected to a limit screw cover 12 through the reverse locking thread 11, a first operating handle 13 is installed on the periphery of the limit screw cover 12, a slide groove 14 is provided on the inner side of the sealing cover 1, and the periphery of the bearing support ring 2 is installed There is a slide 15 that slides with the inside of the slide groove 14, and limit grooves 16 are provided on both sides of the slide groove 14. Both sides of the slide 15 slide with the inside of the limit groove 16 through a limit mechanism 17. An installation groove 18 is provided on the periphery of the rotating shaft 7. The periphery of the rotating shaft 7 and another part of the periphery of the limit clamp 9 are provided with the same direction thread 19. A limit ring 20 is sleeved on the periphery of the rotating shaft 7. The periphery of the rotating shaft 7 is threadedly sleeved with an installation screw cover 21 through the same direction thread 19, and the periphery of the installation screw cover 21 is installed with a second operating handle 22.
[0027] Furthermore, the reverse locking thread 11 is arranged in a direction opposite to the rotation direction of the control shaft 8 .
[0028] Furthermore, when the rotating shaft 7 is butted against the end of the control shaft 8 , the end of the rotating shaft 7 is in a limited-engagement state with the butting groove 10 inside the control shaft 8 through the limited-engagement clamp 9 .
[0029] Furthermore, when the limiting screw cover 12 is rotated in the opposite direction by the first operating handle 13 to approach the rotating shaft 7 , the limiting screw cover 12 is in a limiting locking state for the limiting clamp 9 through the reverse locking thread 11 .
[0030] Furthermore, the limit clamp 9 is engaged with the mounting slot 18 inside the rotating shaft 7, and when the mounting screw cover 21 is rotated forwardly by the second operating handle 22 to approach the control shaft 8, the mounting screw cover 21 limits and fixes the limit clamp 9 through the same direction thread 19.
[0031] The working principle of this utility model:
[0032] The drive shaft between the generator rotor 3 and the runner blades 6 is changed to a drive shaft assembly 4, which is assembled from a rotating shaft 7 and a control shaft 8. In a default state, the rotating shaft 7 can be limitedly docked in a docking slot 10 inside the control shaft 8 through multiple sets of limit clamps 9, and the peripheries of the limit clamps 9 and the control shaft 8 are both provided with reverse locking threads 11. The periphery of the control shaft 8 is threadedly covered with a limit screw cover 12 for thread locking the limit clamps 9 through the reverse locking threads 11. At this time, the control shaft 8 can drive and control the rotating shaft 7 through the runner blades 6. When it is necessary to brake the drive shaft assembly 4, the first operating The operating handle 13 controls the limit position of the limit screw cover 12, so that when the control shaft 8 is driven to rotate, it can automatically unlock and rotate with the limit screw cover 12, and at the same time, the limit screw cover 12 is rotated away from one side of the rotating shaft 7. At this time, the rotating shaft 7 can be pulled to the other side through the second operating handle 22, so that the bearing support ring 2 as a whole is slidably adjusted inside the sliding groove 14 through the sliding member 15, and when the limit clamp 9 in the docking groove 10 on the periphery of the control shaft 8 is separated, the rotating shaft 7 itself can have no driving rotation force, so that it gradually stops rotating, reducing the wear between the rotating shaft 7 and the control shaft 8, ensuring the normal rotation of the generator rotor 3 for power generation, and extending the service life of the drive shaft assembly 4.
[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A hydraulic turbine fault automatic shutdown device, comprising a sealing cover (1), a bearing support ring (2), a generator rotor (3) and a drive shaft assembly (4), wherein the other end of the drive shaft assembly (4) is rotatably connected to the inner side of the end of the sealing cover (1) through a bearing (5), and a runner blade (6) is installed at one end of the drive shaft assembly (4), characterized in that: The driving shaft assembly (4) is assembled from a rotating shaft (7) and a control shaft (8); a limit clamp (9) is provided on one side of the rotating shaft (7) and is linked with the control shaft (8); a mirror-symmetrical docking slot (10) is provided on the periphery of the control shaft (8); a reverse locking thread (11) is provided on the periphery of the control shaft (8) and the periphery of the limit clamp (9); the periphery of the control shaft (8) and the periphery of the limit clamp (9) are both threadedly connected to a limit screw cover (12) via the reverse locking thread (11); and a first operating handle (13) is installed on the periphery of the limit screw cover (12).
2. A hydraulic turbine fault automatic shutdown device according to claim 1, characterized in that: The reverse locking thread (11) is arranged in a direction opposite to the rotation direction of the control shaft (8).
3. A hydraulic turbine fault automatic shutdown device according to claim 2, characterized in that: When the rotating shaft (7) is butted against the end of the control shaft (8), the end of the rotating shaft (7) is in a limited locking state with the butting groove (10) inside the control shaft (8) through the limiting clamp (9); when the limiting screw cover (12) is rotated in the opposite direction by the first operating handle (13) to approach the rotating shaft (7), the limiting screw cover (12) is in a limited locking state with the limiting clamp (9) through the reverse locking thread (11).
4. The hydraulic turbine fault automatic shutdown device according to claim 1, characterized in that: A slide groove (14) is provided on the inner side of the sealing cover (1), and a slide member (15) is installed on the outer periphery of the bearing support ring (2) to slide with the inside of the slide groove (14). Limit grooves (16) are provided on the corresponding two sides inside the slide groove (14), and both sides of the slide member (15) slide with the inside of the limit groove (16) through a limit mechanism (17).
5. The hydraulic turbine fault automatic shutdown device according to claim 3, characterized in that: The outer periphery of the rotating shaft (7) is provided with a mounting slot (18); the outer periphery of the rotating shaft (7) and another part of the outer periphery of the limiting clamp (9) are provided with a same-direction thread (19); the outer periphery of the rotating shaft (7) is sleeved with a limiting ring (20); the outer periphery of the rotating shaft (7) is sleeved with a mounting screw cover (21) through the same-direction thread (19); and the outer periphery of the mounting screw cover (21) is installed with a second operating handle (22).
6. A hydraulic turbine fault automatic shutdown device according to claim 5, characterized in that: The limit clamp (9) is engaged with the mounting slot (18) inside the rotating shaft (7) in a limit-jointed manner. When the mounting screw cover (21) is rotated forwardly by the second operating handle (22) to approach the control shaft (8), the mounting screw cover (21) is fixed to the limit clamp (9) by means of the same-direction thread (19).