A water turbine nozzle rectifier

Abstract

The utility model discloses a kind of water turbine nozzle rectifiers, it is related to the technical field of hydroelectric generation, including blade assembly, it is used to rectify water, it includes mounting plate and rectification blade, mounting plate is the plate structure made of stainless steel, the water side of rectification blade is processed into continuous sawtooth structure, the present application is provided with rectification blade, rectification blade is progressively increasing, front end is smaller and the water flow that just enters nozzle contacts, the tooth of rear end is larger, and the water flow that is buffered by front end sawtooth structure contacts, at this time, water flow impact force is smaller, larger sawtooth structure is further rectified to water, realize progressively rectifying, avoid the impact of water flow to rectification blade overall cause greater damage, the rectification block of the present application and water flow contact first, the strength of its trapezoidal structure increases overall, solve the problem that the flow guide vane of existing water turbine nozzle rectifier lacks buffer, is easily damaged after long-term use, affect overall rectification efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, and in particular to a turbine nozzle rectifier. Background Technology

[0002] Hydropower, as one of the core methods for utilizing clean and renewable energy, relies heavily on the energy conversion efficiency of its core component, the turbine, which directly determines the overall efficiency of the power generation system. In the turbine's operation, water flows through the inlet mechanism and into the nozzle. It must then be sprayed onto the runner blades at a stable and uniform speed and a preset angle to ensure balanced force distribution on the runner, avoid localized eddy current losses, and ultimately achieve efficient energy conversion. Therefore, the nozzle rectifier, as a crucial component connecting the inlet mechanism and the runner, has a vital impact on the overall operating efficiency, stability, and service life of the turbine.

[0003] Currently, most existing turbine nozzle rectifiers are located inside the turbine nozzle or at the outlet. Among them, nozzle rectifiers located inside the turbine nozzle mostly rectify the water flow through internal guide vanes. However, the guide vanes (rectifier vanes) of existing turbine nozzle rectifiers are mostly rectangular, which lacks transition during rectification. When the water flows through the edge of the guide vane at the inlet end, it will directly impact the guide vane under the action of water pressure. After long-term use, the edge of the guide vane is easily damaged by the water flow impact, affecting the overall rectification efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a turbine nozzle rectifier, which solves the problem that the guide vanes of existing turbine nozzle rectifiers lack buffering, are easily damaged after long-term use, and affect the overall rectification efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A turbine nozzle rectifier, comprising:

[0007] The blade assembly, used to rectify the water introduced by the water intake mechanism, includes a mounting plate and rectifying blades. The mounting plate is a plate-shaped structure made of stainless steel. The rectifying blades are made of stainless steel, and the water-facing side of the rectifying blades is machined into a continuous serrated structure. The serration structure gradually increases along the blade span direction (from the water intake end to the water outlet end) through which the water flows. The ends of the serration structure in the rectifying blades are chamfered.

[0008] The mounting mechanism, which is existing technology, is used to mount blade assemblies and fix them to turbine nozzles.

[0009] Preferably, the mounting mechanism includes a housing, which is a cylindrical structure made of metal, and a flange is fixedly connected to one end of the housing. The flange is used to connect the turbine nozzle.

[0010] Preferably, the interior of the housing has six mounting slots for mounting blade assemblies.

[0011] Preferably, the mounting plate is fixed to the inside of the mounting groove by adhesive.

[0012] Preferably, one end of the rectifier blade is fixedly connected to two connecting blocks, and both connecting blocks have through holes at their axial centers. The connecting blocks are used to mate with bolts to connect to the mating blocks.

[0013] Preferably, the surface of the rectifier blade is provided with several drainage holes for water to flow through.

[0014] Preferably, the blade assembly further includes a docking block, the surface of which has a through hole, and the docking block is held between two connecting blocks.

[0015] Preferably, the through hole in the mating block is aligned with the through hole in the connecting block, and a bolt is inserted into the through hole. The bolt passes through one end of the mating block and the connecting block and is threaded with a hexagonal nut.

[0016] Preferably, a rectifier block is fixedly connected to the bottom of the docking block by welding, and the rectifier block is used for rectification.

[0017] Preferred design: The rectifier is trapezoidal, and the rectifier comes into contact with the water flow first. The trapezoidal structure makes the rectifier stronger and less likely to be damaged by the water flow.

[0018] This application incorporates rectifier blades that gradually increase in size. The front end is smaller and contacts the water flow just entering the nozzle, while the rear end has larger teeth that contact the water flow buffered by the front serrated structure. At this point, the water flow impact force is small, and the larger serrated structure further rectifies the water, achieving gradual rectification and preventing the impact force of the water flow from causing significant damage to the rectifier blades. The rectifier block of this application contacts the water flow first, and its trapezoidal structure increases the overall strength. Furthermore, it can be disassembled and replaced, solving the problem that the guide blades of existing turbine nozzle rectifiers lack buffering, are easily damaged after long-term use, and affect the overall rectification efficiency. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a structural diagram of the installation mechanism of this utility model;

[0022] Figure 3 This is a structural diagram of the blade assembly of this utility model;

[0023] Figure 4 This is an exploded view of the blade assembly of this utility model.

[0024] Legend: 100, mounting mechanism; 101, housing; 102, mounting groove; 103, flange; 200, blade assembly; 201, mounting plate; 202, rectifier blade; 203, flow guide hole; 204, connecting block; 210, mating block; 211, rectifier block; 300, bolt. Detailed Implementation

[0025] This application provides a turbine nozzle rectifier, which effectively solves the problem that the guide vanes of existing turbine nozzle rectifiers lack buffering, are easily damaged after long-term use, and affect the overall rectification efficiency.

[0026] Example 1

[0027] Currently, most existing turbine nozzle rectifiers are located inside the turbine nozzle or at the outlet. Those located inside the nozzle typically rectify the water flow using internal guide vanes. However, the guide vanes in existing turbine nozzle rectifiers are mostly rectangular, lacking a smooth transition during rectification. When the water flows past the edge of the guide vane's inlet, it directly impacts the vane under water pressure. Over time, the edges of the guide vanes are easily damaged, affecting the overall rectification efficiency. To address these problems, this invention provides a turbine nozzle rectifier... The device, by setting a serrated blade assembly 200 on the mounting mechanism 100, allows space for the water flow to pass through when it comes into contact with the serrations of the blade assembly 200, thus releasing the impact force of the water flow. The flow-guiding holes 203 opened on the blade assembly 200 further assist in releasing the impact force of the water flow. In addition, the serrated blade assembly 200 of this application is also progressively enlarged, with a smaller front end that contacts the water flow that just enters the nozzle, and a larger rear end that contacts the water flow that has been buffered by the front serrated structure. At this time, the impact force of the water flow is small, and the larger serrated structure further rectifies the water flow, realizing progressive rectification and solving the above problems.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4The turbine nozzle rectifier includes a blade assembly 200 for rectification, the blade assembly 200 having progressively larger sawtooth shape to gradually increase the rectification effect, buffering and rectifying the water flow step by step, and also includes an installation mechanism 100 for mounting the blade assembly 200, and bolts 300 are connected to the surface of the blade assembly 200.

[0029] like Figure 3 and Figure 4 As shown, the blade assembly 200 is used to rectify the water introduced by the water intake mechanism. It includes a mounting plate 201 and a rectifier blade 202. The mounting plate 201 is a plate-shaped structure made of stainless steel. The rectifier blade 202 is made of stainless steel. The water-facing side of the rectifier blade 202 is processed into a continuous serrated structure. The serration structure gradually increases along the blade span direction (from the water intake end to the water outlet end) through which the water flows. The ends of the serration structure in the rectifier blade 202 are chamfered.

[0030] like Figure 1 and Figure 2 As shown, the mounting mechanism 100, which is prior art, is used to mount the blade assembly 200 and fix it to the turbine nozzle.

[0031] like Figure 1 and Figure 2 As shown, the mounting mechanism 100 includes a housing 101, which is a cylindrical structure made of metal. A flange 103 is fixedly connected to one end of the housing 101. The flange 103 is used to connect the turbine nozzle.

[0032] like Figure 1 and Figure 2 As shown, the interior of the housing 101 has six mounting slots 102 for mounting the blade assembly 200.

[0033] like Figure 3 and Figure 4 As shown, the mounting plate 201 is fixedly installed inside the mounting groove 102 by adhesive.

[0034] Two connecting blocks 204 are fixedly connected to one end of the rectifier blade 202. Both connecting blocks 204 have through holes at their axial centers. The connecting blocks 204 are used to connect the mating block 210 with the bolts 300.

[0035] like Figure 3 and Figure 4 As shown, the surface of the rectifier blade 202 is provided with several flow-guiding holes 203, which are used for water flow.

[0036] like Figure 3 and Figure 4As shown, the blade assembly 200 also includes a docking block 210, the surface of which has a through hole, and the docking block 210 is clamped between two connecting blocks 204.

[0037] like Figure 3 and Figure 4 As shown, the through hole of the mating block 210 is aligned with the through hole of the connecting block 204, and a bolt 300 is inserted into the through hole. The bolt 300 passes through the mating block 210 and the connecting block 204 and is threaded with a hexagonal nut at one end.

[0038] like Figure 3 and Figure 4 As shown, the bottom of the docking block 210 is fixedly connected to the rectifier block 211 by welding. The rectifier block 211 is used for rectification.

[0039] like Figure 3 and Figure 4 As shown, the rectifier 211 is trapezoidal. The rectifier 211 comes into contact with the water flow first. The trapezoidal structure makes the rectifier 211 stronger and less likely to be damaged by the water flow.

[0040] This application incorporates rectifying blades 202, which are progressively larger. The front end is smaller and contacts the water flow just entering the nozzle, while the rear end has larger teeth that contact the water flow buffered by the front serrated structure. At this point, the water flow impact force is small, and the larger serrated structure further rectifies the water, achieving progressive rectification and preventing the impact force of the water flow from causing significant damage to the rectifying blades 202 as a whole. The rectifying block 211 of this application contacts the water flow first, and its trapezoidal structure increases the overall strength. Furthermore, it can be disassembled and replaced to avoid affecting the rectification effect.

[0041] The above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A turbine nozzle rectifier, characterized in that, include; The blade assembly (200) is used to rectify water flow. It includes a mounting plate (201) and a rectifier blade (202). The mounting plate (201) is a plate-shaped structure made of stainless steel. The water-facing side of the rectifier blade (202) is processed into a continuous serrated structure. The serration structure gradually increases along the blade span direction through which the water flows. The ends of the serration structure in the rectifier blade (202) are chamfered. The mounting mechanism (100) is used to mount the blade assembly (200) and fix it to the turbine nozzle.

2. The turbine nozzle rectifier as described in claim 1, characterized in that: The mounting mechanism (100) includes a housing (101), one end of which is fixedly connected to a flange (103).

3. A turbine nozzle rectifier as described in claim 2, characterized in that: The interior of the outer casing (101) has six mounting slots (102).

4. A turbine nozzle rectifier as described in claim 3, characterized in that: The mounting plate (201) is fixedly installed inside the mounting groove (102).

5. A turbine nozzle rectifier as described in claim 4, characterized in that: Two connecting blocks (204) are fixedly connected to one end of the rectifier blade (202), and there are through holes at the center of the two connecting blocks (204).

6. A turbine nozzle rectifier as described in claim 5, characterized in that: The surface of the rectifier blade (202) is provided with a flow-guiding hole (203).

7. A turbine nozzle rectifier as described in claim 6, characterized in that: The blade assembly (200) also includes a docking block (210), the surface of which is provided with a through hole, and the docking block (210) is held between two connecting blocks (204).

8. A turbine nozzle rectifier as described in claim 7, characterized in that: The through hole of the mating block (210) is aligned with the through hole of the connecting block (204), and a bolt (300) is inserted in the through hole. The bolt (300) passes through the mating block (210) and the connecting block (204) and is threaded with a hexagonal nut at one end.

9. A turbine nozzle rectifier as described in claim 8, characterized in that: A rectifier block (211) is fixedly connected to the bottom of the docking block (210).

10. A turbine nozzle rectifier as described in claim 9, characterized in that: The rectifier block (211) is trapezoidal.

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