Anti-wear runner structure of a hydraulic turbine

Abstract

The utility model discloses a kind of anti-wear runner structures of water turbine, comprising: structure frame, structure frame two ends are respectively provided with end plate, two end plates are connected with support rod, end plate is provided with several mounting holes, end plate outer surface is installed with top plate, top plate is provided with limit hole;Several runner leaves, runner leaf is installed between two end plates, runner leaf two ends are provided with mounting shaft, mounting shaft passes through mounting hole and enters into limit hole, mounting shaft is connected with limit block, limit block corresponds with limit hole;Buffer spring, buffer spring is placed in limit hole, buffer spring two ends are respectively connected with mounting shaft and limit hole side wall.The beneficial effects of the utility model are: the impact force of water flow can be absorbed by the rubber block and buffer spring set, play the role of buffering, avoid the silt in water with water to runner leaf impact damage, and then can improve the wear resistance effect;The anti-abrasion coating is sprayed with tungsten carbide, and the anti-abrasion coating can play a protective role and improve the wear resistance effect.

Description

Technical Field

[0001] This utility model relates to the technical field of water turbines, and in particular to a wear-resistant runner structure for a water turbine. Background Technology

[0002] Turbine runner wear is a significant issue in hydropower. Due to the long-term impact and friction of water flow, the surface of the turbine runner experiences wear, affecting the turbine's performance and lifespan. The current state of turbine runner wear is mainly characterized by: suspended particles and gravel in the water flow, which exert friction on the runner surface, leading to gradual wear; the impact of particles in the water flow on the runner surface causing fatigue failure of the runner material, manifesting as cracks and spalling; and, under long-term operation, this fatigue wear leading to runner failure. Furthermore, wear increases the surface roughness of the runner, affecting the smooth flow of water and reducing turbine efficiency. The development of wear-resistant runners can reduce frictional resistance caused by wear and improve the turbine's conversion efficiency. Utility Model Content

[0003] The present invention aims to overcome the shortcomings of existing poor anti-wear effects and provides an anti-wear type runner structure for water turbines with good anti-wear effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a wear-resistant impeller structure for a water turbine, comprising: a structural frame, end plates respectively provided at both ends of the structural frame, a support rod connected between the two end plates, a plurality of mounting holes provided in the end plates, a top plate installed on the outer surface of the end plates, and limit holes provided in the top plate; Several impeller blades are mounted between two end plates. Each impeller blade has a mounting shaft at both ends. The mounting shaft passes through a mounting hole and enters a limiting hole. The mounting shaft is connected to a limiting block, and the limiting block corresponds to the limiting hole. A buffer spring is placed inside a limiting hole, and both ends of the buffer spring are connected to the mounting shaft and the side wall of the limiting hole, respectively.

[0005] This impeller structure includes a frame consisting of two end plates and several support rods. The end plates have evenly spaced mounting holes. A top plate with limiting holes is mounted on the outer side of each end plate. Several impeller blades are positioned between the two end plates. Each impeller blade has a mounting shaft at both ends, passing through the mounting holes and with its end entering the limiting hole. A limiting block is mounted on the end of the mounting shaft, which engages with the limiting hole to limit the angle of the impeller blades and ensure optimal impeller performance. A buffer spring (a spiral spring) is installed in the limiting hole. One end of the buffer spring engages with the mounting shaft, and the other end engages with the side wall of the limiting hole, allowing the buffer spring to compress when the impeller blades rotate. This structure ensures that when the impeller comes into contact with water, it rotates, compressing the buffer spring and mitigating the impact of the water flow. This prevents impurities such as sediment from damaging the impeller, thus improving its wear resistance.

[0006] Preferably, a rubber block is fitted onto the mounting shaft, and the rubber block is inserted into the mounting hole. Specifically, the rubber block, which is circular and can be inserted into the mounting hole, acts as a buffer, absorbing the energy of the impeller blades when impacted by water. This buffering effect prevents mud and sand in the water from impacting and damaging the impeller blades, thereby improving the wear resistance.

[0007] Preferably, the top plate has several through holes, the end plate has several positioning holes, and a sealing plate is provided on the outer side of the top plate. The sealing plate has several positioning posts, which pass through the through holes and are inserted into the positioning holes. Specifically, the through holes are provided on the bottom surface of the top plate, and the positioning holes are provided on the end plate, arranged coaxially. Simultaneously, the sealing plate on the outer side of the top plate has several positioning posts with the same diameter as the through holes and positioning holes. The positioning posts pass through the through holes and are inserted into the positioning holes to fix the top plate and ensure structural stability.

[0008] Preferably, the inner wall of the limiting hole is provided with two stops, each a sector-shaped block, arranged symmetrically. The limiting block is also a sector-shaped block, positioned between the two stops. Specifically, two stops are symmetrically arranged above the inner wall of the limiting hole, while the limiting block on the mounting shaft is divided into two sector-shaped blocks, positioned between the stops. The limiting block can swing between the two stops. When the impeller is impacted, the impeller rotates, compressing the buffer spring. Simultaneously, the limiting block contacts the stops, completing the limiting engagement and stabilizing the impeller angle. This absorbs the impact force of the water flow during impeller rotation, acting as a buffer and preventing sediment in the water from impacting and damaging the impeller, thereby improving wear resistance.

[0009] Preferably, the impeller blade has an elliptical cross-section, and its outer surface is coated with an anti-abrasion coating. The elliptical cross-section reduces the impact force of the water flow, while the tungsten carbide coating on the outer surface provides protection and improves wear resistance.

[0010] Preferably, the sealing plate, top plate, and end plate are all provided with clearance holes. The support rod passes through the clearance holes, and locking nuts are connected to the two outer ends of the support rod. A support platform is provided at the inner end of the support rod, and the support platform contacts the end plate. Specifically, several clearance holes are provided on the sealing plate, top plate, and end plate. These clearance holes are coaxially arranged, allowing the support rod to pass through them, with both ends extending beyond the sealing plate. Locking nuts are connected to the ends of the support rod. Simultaneously, support platforms are provided at both ends of the middle section of the support rod. These support platforms support the end plates, ensuring the distance between the two end plates meets the requirements for the installation of the impeller blades. Furthermore, in conjunction with the locking nuts, the support rod presses the two sealing plates tightly against the top plate, ensuring stable installation and assembly of the structure.

[0011] The beneficial effects of this utility model are: the rubber block and buffer spring can absorb the impact force of the water flow, play a buffering role, and prevent the mud and sand in the water from impacting and damaging the impeller blades, thereby improving the wear resistance effect; the wear-resistant coating is made of tungsten carbide spraying, which can play a protective role and improve the wear resistance effect. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a sectional view of the impeller mounting location of this utility model; Figure 3 This is a top view of the limiting holes in this utility model; Figure 4 This is a sectional view of the support rod installation location in this utility model.

[0013] In the attached diagram, 1. End plate, 2. Support rod, 3. Top plate, 4. Rotary impeller, 5. Buffer spring, 6. Sealing plate, 7. Anti-abrasion coating, 8. Clearance hole, 10. Mounting hole, 11. Positioning hole, 20. Locking nut, 21. Support platform, 30. Limiting hole, 31. Through hole, 32. Stop block, 40. Mounting shaft, 41. Limiting block, 42. Rubber block, 60. Positioning post. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0017] Example 1, such as Figure 1-4 As shown, a wear-resistant runner structure for a water turbine includes: A structural frame, wherein end plates 1 are respectively provided at both ends of the structural frame, and a support rod 2 is connected between the two end plates 1. The end plates 1 are provided with a plurality of mounting holes 10, and a top plate 3 is installed on the outer surface of the end plates 1. The top plate 3 is provided with limit holes 30. A plurality of rotating blades 4 are mounted between two end plates 1. Each rotating blade 4 has a mounting shaft 40 at both ends. The mounting shaft 40 passes through the mounting hole 10 and enters the limiting hole 30. The mounting shaft 40 is connected to a limiting block 41, which corresponds to the limiting hole 30. A buffer spring 5 is placed inside a limiting hole 30, and both ends of the buffer spring 5 are connected to the mounting shaft 40 and the side wall of the limiting hole 30, respectively.

[0018] The mounting shaft 40 is fitted with a rubber block 42, which is inserted into the mounting hole 10.

[0019] The top plate 3 is provided with a number of through holes 31, the outer top surface of the end plate 1 is provided with a number of positioning holes 11, the outer side of the top plate 3 is provided with a sealing plate 6, the sealing plate 6 is provided with a number of positioning posts 60, and the positioning posts 60 pass through the through holes 31 and are inserted into the positioning holes 11.

[0020] The inner wall of the limiting hole 30 is provided with two stops 32, the stops 32 are fan-shaped blocks, the two stops 32 are arranged symmetrically, and the limiting block 41 is a fan-shaped block, the limiting block 41 is placed between the two stops 32.

[0021] The rotor blade 4 has an elliptical cross-section, and the outer surface of the rotor blade 4 is coated with an anti-wear coating 7.

[0022] The sealing plate 6, the top plate 3, and the end plate 1 are all provided with clearance holes 8. The support rod 2 passes through the clearance holes 8. The two outer ends of the support rod 2 are connected with locking nuts 20. The inner end of the support rod 2 is provided with a support platform 21, which contacts the end plate 1.

[0023] The principle of this utility model is as follows: Figure 1-4 As shown, this rotary wheel structure includes a structural frame consisting of two end plates 1 and several support rods 2. Several mounting holes 10 are provided on the end plates 1, arranged at equal intervals. A top plate 3 is installed on the outer side of the end plates 1, and a limiting hole 30 is provided on the top plate 3. Several rotary wheel blades 4 are arranged between the two end plates 1. Mounting shafts 40 are provided at both ends of the rotary wheel blades 4. The mounting shafts 40 pass through the mounting holes 10, and the ends of the mounting shafts 40 enter the limiting holes 30. Simultaneously, a limiting block 41 is provided at the end of the mounting shaft 40, which can limit the angle of the rotary wheel blades 4 by engaging with the limiting hole 30, ensuring the effective use of the rotary wheel. A buffer spring 5, which is a spiral spring 5, is installed in the limiting hole 30. One end of the buffer spring 5 is engaged with the mounting shaft 40, and the other end is engaged with the side wall of the limiting hole 30, so that the buffer spring 5 can be compressed when the rotary wheel blades 4 rotate. This structure causes the impeller to rotate when it comes into contact with water, compressing the buffer spring 5, which helps to reduce the impact of the water flow and prevent impurities such as mud and sand in the water from damaging the impeller, thereby improving the wear resistance.

[0024] A rubber block 42 is fitted onto the mounting shaft 40. The rubber block 42 is circular and can be inserted into the mounting hole 10. The rubber block 42 can act as a buffer to absorb the energy of the impeller blade 4 when it is impacted by water, thus preventing mud and sand in the water from impacting and damaging the impeller blade 4 and improving the wear resistance.

[0025] A through hole 31 is provided on the bottom surface of the top plate 3, and a positioning hole 11 is provided on the end plate 1. The through hole 31 and the positioning hole 11 are arranged coaxially. At the same time, a sealing plate 6 is provided on the outer side of the top plate 3. Several positioning posts 60 are provided on the sealing plate 6. The diameter of the positioning posts 60 is the same as the diameter of the through hole 31 and the positioning hole 11. The positioning posts 60 pass through the through hole 31 and are inserted into the positioning hole 11 to fix the top plate 3 and ensure the stability of the structure.

[0026] Two stops 32 are provided above the inner wall of the limiting hole 30, and the two stops 32 are arranged symmetrically. At the same time, the limiting block 41 provided on the mounting shaft 40 is divided into two fan-shaped blocks. The limiting block 41 is placed between the stops 32 and can swing between the two stops 32. When the impeller 4 is impacted, the impeller 4 rotates and compresses the buffer spring 5. At the same time, the limiting block 41 contacts the stops 32 to complete the limiting engagement, so that the angle of the impeller 4 is stable. When the impeller 4 rotates, it absorbs the impact force of the water flow and plays a buffering role, preventing the mud and sand in the water from impacting and damaging the impeller 4 with the water, thereby improving the wear resistance.

[0027] The impeller blade 4 has an elliptical cross-section, which reduces the impact force of the water flow. At the same time, an anti-wear coating 7 is sprayed on the outer surface of the impeller blade 4. The anti-wear coating 7 is made of tungsten carbide and can play a protective role and improve the anti-wear effect.

[0028] Several clearance holes 8 are provided on the sealing plate 6, top plate 3 and end plate 1. The clearance holes 8 are arranged coaxially, and the support rod 2 can pass through the clearance holes 8. Both ends of the support rod 2 extend beyond the sealing plate 6. Locking nuts 20 are connected to the ends of the support rod 2. At the same time, support platforms 21 are provided at both ends of the middle part of the support rod 2. The support platforms 21 can support the end plate 1 and ensure that the distance between the two end plates 1 meets the installation of the impeller blade 4. With the help of the locking nuts 20, the support rod 2 presses the two sealing plates 6 tightly against the top plate 3 to ensure the stability of the installation and assembly of the structure.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wear-resistant runner structure for a water turbine, characterized in that, include: The structural frame has end plates (1) at both ends, and a support rod (2) is connected between the two end plates (1). The end plates (1) are provided with a plurality of mounting holes (10). A top plate (3) is installed on the outer surface of the end plates (1). The top plate (3) is provided with limit holes (30). Several impeller blades (4) are installed between two end plates (1). The impeller blades (4) are provided with mounting shafts (40) at both ends. The mounting shafts (40) pass through the mounting holes (10) and enter the limiting holes (30). The mounting shafts (40) are connected to limiting blocks (41). The limiting blocks (41) correspond to the limiting holes (30). A buffer spring (5) is placed inside a limiting hole (30), and both ends of the buffer spring (5) are connected to the mounting shaft (40) and the side wall of the limiting hole (30), respectively.

2. The wear-resistant runner structure for a water turbine according to claim 1, characterized in that, The mounting shaft (40) is fitted with a rubber block (42), which is inserted into the mounting hole (10).

3. The wear-resistant runner structure for a water turbine according to claim 1, characterized in that, The top plate (3) is provided with several through holes (31), the outer top surface of the end plate (1) is provided with several positioning holes (11), the outer side of the top plate (3) is provided with a sealing plate (6), the sealing plate (6) is provided with several positioning posts (60), and the positioning posts (60) pass through the through holes (31) and are inserted into the positioning holes (11).

4. The wear-resistant runner structure for a water turbine according to claim 1, characterized in that, The inner wall of the limiting hole (30) is provided with two blocks (32), the blocks (32) are fan-shaped blocks, the two blocks (32) are arranged symmetrically, the limiting block (41) is a fan-shaped block, and the limiting block (41) is placed between the two blocks (32).

5. The wear-resistant runner structure for a water turbine according to claim 1, characterized in that, The impeller blade (4) has an elliptical cross section, and the outer surface of the impeller blade (4) is coated with an anti-wear coating (7).

6. The wear-resistant runner structure for a water turbine according to claim 3, characterized in that, The sealing plate (6), top plate (3) and end plate (1) are all provided with clearance holes (8). The support rod (2) passes through the clearance holes (8). The two outer ends of the support rod (2) are connected with locking nuts (20). The inner end of the support rod (2) is provided with a support platform (21). The support platform (21) is in contact with the end plate (1).

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