Assembly type impact rotating wheel assembly method and assembled rotating wheel

Abstract

The invention discloses an assembly type impact rotating wheel assembly method and an assembled rotating wheel, and belongs to the technical field of hydroelectric generating set devices. The structure comprises a wheel disc and a plurality of water buckets assembled on the circumference of the wheel disc, a concave groove is formed in the side wall of the circumference of the wheel disc, each water bucket comprises a bucket bucket and a bucket handle, the water buckets are assembled in the concave grooves through the bucket handles, and the bucket handles are positioned through a positioning mechanism and fixedly assembled on the wheel disc through a fixing structure; the water bucket is stable in structure, high in reliability and easy to implement, so that safe and stable operation of the whole unit is guaranteed, the stress condition of the root of the water bucket is optimized, the stress of the unit in the operation process is more uniform, meanwhile, the risks of water bucket runaway and breakage are reduced through multiple guarantees, and safe and stable operation of the whole unit is guaranteed.

Description

Technical Field

[0001] The invention relates to an assembly method of an assembled impact wheel and an assembled wheel, belonging to the technical field of hydropower unit devices. Background Art

[0002] The impact impeller is the core component of the impact hydropower unit. It consists of a disc and a bucket. It is usually divided into two types: integral molding and assembly molding after separate processing. Integral molding is limited by the complex curved surface of the bucket and the small spacing between the buckets, so the cycle is long and the difficulty is high. Assembly molding is usually chosen, that is, the bucket and the disc are manufactured separately, and finally assembled or welded together. The processing difficulty is small and the cycle is short, but the overall strength of the impeller is poor. The complex force during the operation of the impeller can easily lead to fatigue fracture of the bolts, and even cause serious accidents such as bucket breakage.

[0003] CN114109694A discloses a combined impulse turbine runner, which has a structure of a wheel disc, upper and lower cover plates + a water bucket. The structure is relatively complex, and the structural integrity of the wheel disc is not very ideal. Summary of the invention

[0004] The object of the present invention is to provide an assembled impact wheel assembly method and an assembled wheel in view of the above-mentioned problems, which has a simple structure, is more compact, and has good reliability.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An assembly method of an assembled impact wheel comprises the following steps:

[0007] S1, the wheel disc is machined according to the processing size, a concave groove is machined, and assembly holes and positioning holes are machined according to requirements, and the handle and bucket of the water bucket are simultaneously machined, and matching assembly holes and positioning holes are machined on the handle;

[0008] S2, during assembly, the water bucket is assembled in the concave groove, and the positioning holes of the wheel disc and the water bucket are aligned in place. Each water bucket is assembled with the wheel disc through at least two positioning holes. After alignment, the positioning pins are inserted to fix the position of the water bucket relative to the wheel disc;

[0009] S3, after the position of the water bucket is fixed, bolts are used to assemble it into the assembly hole, and the bolts are used to assemble and fix it into shape, so that the wheel and the water bucket are assembled;

[0010] S4, after the assembly is completed, apply sealant to the assembly holes and positioning holes to prevent water from seeping into the bolts and positioning pins and causing failure. After the sealing is completed, perform a balance test on the entire runner.

[0011] An assembled impact wheel, applied to the above-mentioned assembled impact wheel, includes a wheel disc and a plurality of water buckets assembled on the circumference of the wheel disc, a concave groove is provided on the circumferential side wall of the wheel disc, the water bucket includes a bucket and a handle, the water bucket is assembled in the concave groove through the handle, the handle is positioned by a positioning mechanism, and is fixedly assembled on the wheel disc by a fixing structure.

[0012] Furthermore, the wheel disc is made in one piece and is formed by machining a concave groove.

[0013] Furthermore, the fixing mechanism includes a plurality of groups of assembly holes distributed in a circular array, each group of assembly holes includes at least one assembly hole, and each of the handles is provided with an assembly hole matching each group, and is fixed and assembled by bolts.

[0014] Furthermore, the assembly holes are arranged on the side wall of the wheel disc where the concave groove is located, the assembly holes located on the upper side wall penetrate the upper side wall, and the assembly holes located on the lower side wall extend to the middle or lower part of the lower side wall.

[0015] Furthermore, the thickness of the bottom of the assembly hole located on the lower side wall is 5 mm to 10 mm from the bottom surface of the lower side wall.

[0016] Furthermore, the assembly hole on the handle and / or the assembly hole on the lower side wall is a threaded hole, and the bolts match the threaded holes and are fixedly assembled.

[0017] Furthermore, the positioning mechanism includes a plurality of groups of positioning holes arranged on the circumference of the wheel disc, each handle is provided with a corresponding matching positioning hole, and is positioned by a positioning pin, and the positioning hole is arranged on the upper side wall of the wheel disc where the concave groove is located.

[0018] Furthermore, each group of positioning holes includes two holes, and each group of assembly holes includes one hole, and the positioning holes are respectively arranged on both sides of the assembly holes along the axis.

[0019] Furthermore, the handle is a cylindrical structure, and assembly planes are arranged on both sides of the cylinder, and the assembly holes and the positioning holes are arranged on the assembly planes.

[0020] Furthermore, the length of the handle is 1 / 3-2 / 5 of the length of the bucket.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The assembly method of an assembled impact wheel and the assembled wheel of the present invention have a stable structure, high reliability, and are easy to implement, thereby ensuring the safe and stable operation of the entire unit. With high reliability, the force condition at the root of the bucket is optimized, so that the force of the unit is more uniform during operation, and multiple guarantees reduce the risk of the bucket flying away and breaking, thereby ensuring the safe and stable operation of the entire unit;

[0023] 2. An assembled impulse turbine assembly method and an assembled turbine of the present invention use at least two positioning holes for assembly. The assembly holes are accurately positioned during the bucket assembly process through linear positioning. At the same time, in terms of structural design, the three components of the positioning pin and the assembly bolt are positioned and fixed for assembly, and the bearing capacity is provided at the same time. In the application of small impulse turbines, the risks of flight and breakage are fully guaranteed, and a strong guarantee is provided for the safe and stable operation of the entire unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 is a top view of the roulette wheel of the present invention;

[0027] Figure 3 is a cross-sectional view of a roulette wheel of the present invention;

[0028] Figure 4 It is one of the schematic diagrams of the water bucket of the present invention;

[0029] Figure 5 It is the second schematic diagram of the water bucket of the present invention.

[0030] Markings in the figure: 1-wheel, 2-concave groove, 3-water bucket, 4-handle, 5-scoop, 6-assembly hole, 7-positioning hole, 8-assembly plane. DETAILED DESCRIPTION

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0032] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0033] Example 1

[0034] An assembly method of an assembled impact wheel, such as Figures 1 to 5 As shown, the following steps are included:

[0035] S1, the wheel disc 1 is machined into a shape according to the processing size, a concave groove 2 is machined, and an assembly hole 6 and a positioning hole 7 are machined according to the requirements, and the handle 4 and the bucket 5 of the bucket 3 are simultaneously machined into shape, and matching assembly holes 6 and positioning holes 7 are machined on the handle 4;

[0036] S2, during assembly, assemble the water bucket 3 into the concave groove 2, align the positioning holes 7 of the wheel disc 1 and the water bucket 3, and assemble each water bucket 3 with the wheel disc 1 through at least two positioning holes 7. After alignment, insert the positioning pin to fix the position of the water bucket 3 relative to the wheel disc 1;

[0037] S3, after the position of the bucket 3 is fixed, it is assembled into the assembly hole 6 by bolts, and is assembled and fixed by bolts to complete the assembly of the wheel disc 1 and the bucket 3;

[0038] S4, after the assembly is completed, apply sealant to the assembly hole 6 and the positioning hole 7 to prevent water from soaking the bolts and positioning pins and causing failure. After the sealing is completed, perform a balance test on the entire runner.

[0039] In this embodiment, the structure adopted is stable, reliable, and easy to implement, thereby ensuring the safe and stable operation of the entire unit. With high reliability, the force condition at the root of the bucket 3 is optimized, so that the force of the unit is more uniform during operation, and multiple guarantees reduce the risk of the bucket 3 flying away or breaking, thereby ensuring the safe and stable operation of the entire unit.

[0040] Example 2

[0041] An assembled impact wheel, corresponding to the assembly method of an assembled impact wheel in embodiment 1, such as Figure 1 - Figure 5 As shown, it includes a wheel disc 1 and a plurality of water buckets 3 mounted on the circumference of the wheel disc 1, a concave groove 2 is provided on the circumferential side wall of the wheel disc 1, the water bucket 3 includes a bucket 5 and a handle 4, the water bucket 3 is mounted in the concave groove 2 through the handle 4, the handle 4 is positioned by a positioning mechanism, and is fixedly mounted on the wheel disc 1 by a fixing structure.

[0042] In this embodiment, in terms of specific structural design, compared with traditional structures, this design adopts a simple combination of positioning and fixed assembly to realize the assembly of the entire structure, especially when applied to test prototypes or small hydropower stations. The structural design is simple, the on-site assembly is fast and effective, and the subsequent maintenance is also relatively fast and simple, which not only effectively reduces costs, but also further reduces the workload of labor, further improving the assembly efficiency of the entire water wheel.

[0043] In the above specific structural design, as a more specific design, the wheel disc 1 is made in one piece and is made by processing the concave groove 2. In the design of this structure, the concave groove 2 is processed by milling the outer circumference of the wheel disc 1.

[0044] As a more specific design, the fixing mechanism includes multiple groups of assembly holes 6 distributed in a circular array, each group of assembly holes 6 includes at least one assembly hole 6, and each of the handles 4 is provided with an assembly hole 6 matching each group and is fixed and assembled by bolts.

[0045] For further design, as a more specific design, the assembly hole 6 is arranged on the side wall of the wheel disc 1 where the concave groove 2 is located, the assembly hole 6 located on the upper side wall passes through the upper side wall, and the assembly hole 6 located on the lower side wall extends to the middle or lower part of the lower side wall.

[0046] More specifically, the thickness of the bottom of the assembly hole 6 located on the lower side wall is 5 mm to 10 mm from the bottom surface of the lower side wall.

[0047] In the above-mentioned specific structural design, the threaded bottom hole does not penetrate the entire wheel disc 1, and the fixing of the entire structure is achieved by means of bolts. In a more specific design, the assembly hole 6 on the handle 4 and / or the assembly hole 6 located on the lower side wall are threaded holes, and the bolts match the threaded holes and are fixedly assembled. Of course, in the structural design, the structure that can be adopted is that the assembly holes 6 are all internal threaded holes, and the problem of the clearance of the assembly holes 6 is solved by this design method. For further optimization design, the assembly holes 6 on the handle 4 and the assembly holes 6 located on the lower side wall are threaded holes.

[0048] As a more specific structural design, the positioning mechanism includes a plurality of positioning holes 7 arranged on the circumference of the wheel disc 1, each handle 4 is provided with a corresponding matching positioning hole 7, and is positioned by a positioning pin, and the positioning hole 7 is arranged on the upper side wall of the wheel disc 1 where the concave groove 2 is located.

[0049] In order to ensure the accuracy of positioning and to consider the effect of aligning the assembly holes 6, a specific design is that each group of positioning holes 7 includes 2, each group of assembly holes 6 includes 1, and the positioning holes 7 are respectively arranged on both sides of the assembly hole 6 along the axis.

[0050] In the above specific structural design, as a specific implementation method, the number of water buckets 3 is 22 groups, and the wheel disc 1 is provided with 22 assembly holes 6 distributed in a circular array, matched with 22 groups of positioning holes 7, and each group of positioning holes 7 has 2 positioning holes 7. During assembly, the positioning pins are assembled first and then the bolts are screwed in to pull them together to realize the assembly of the overall structure.

[0051] On the basis of the design of the above-mentioned specific structure, the handle 4 is a cylindrical structure, and assembly planes 8 are arranged on both sides of the cylinder, and the assembly holes 6 and the positioning holes 7 are arranged on the assembly planes 8 .

[0052] Based on overall force considerations, the length of the handle 4 is 1 / 3-2 / 5 of the length of the bucket 5. In addition, the length of the handle 4 is 4-6 mm less than the depth of the concave groove 2 for assembling the handle 4.

[0053] In summary:

[0054] 1. The assembly method of an assembled impact wheel and the assembled wheel of the present invention have a stable structure, high reliability, and are easy to implement, thereby ensuring the safe and stable operation of the entire unit. With high reliability, the force condition at the root of the bucket is optimized, so that the force of the unit is more uniform during operation, and multiple guarantees reduce the risk of the bucket flying away and breaking, thereby ensuring the safe and stable operation of the entire unit;

[0055] 2. An assembled impulse turbine assembly method and an assembled turbine of the present invention use at least two positioning holes for assembly. The assembly holes are accurately positioned during the bucket assembly process through linear positioning. At the same time, in terms of structural design, the three components of the positioning pin and the assembly bolt are positioned and fixed for assembly, and the bearing capacity is provided at the same time. In the application of small impulse turbines, the risks of flight and breakage are fully guaranteed, and a strong guarantee is provided for the safe and stable operation of the entire unit.

[0056] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A method for assembling an assembled impact wheel, characterized in that: The following steps are involved: S1, the wheel disc is machined according to the processing size, a concave groove is machined, and assembly holes and positioning holes are machined according to requirements, and the handle and bucket of the water bucket are simultaneously machined, and matching assembly holes and positioning holes are machined on the handle; S2, during assembly, the water bucket is assembled in the concave groove, and the positioning holes of the wheel disc and the water bucket are aligned in place. Each water bucket is assembled with the wheel disc through at least two positioning holes. After alignment, the positioning pins are inserted to fix the position of the water bucket relative to the wheel disc; S3, after the position of the water bucket is fixed, bolts are used to assemble it into the assembly hole, and the bolts are used to assemble and fix it into shape, so that the wheel and the water bucket are assembled; S4, after the assembly is completed, apply sealant to the assembly holes and positioning holes to prevent water from seeping into the bolts and positioning pins and causing failure. After the sealing is completed, perform a balance test on the entire runner.

2. An assembled impact wheel, applied to the assembly method of an assembled impact wheel according to claim 1, characterized in that: It includes a wheel disc and a plurality of water buckets mounted on the circumference of the wheel disc, a concave groove is arranged on the circumferential side wall of the wheel disc, the water bucket includes a bucket and a handle, the water bucket is mounted in the concave groove through the handle, the handle is positioned by a positioning mechanism, and is fixedly mounted on the wheel disc by a fixing structure.

3. An assembled impact wheel as claimed in claim 2, characterized in that: The fixing mechanism comprises a plurality of groups of assembly holes distributed in a circular array, each group of assembly holes comprises at least one assembly hole, and each of the handles is provided with an assembly hole matching each group, and the assembly is fixed by bolts.

4. An assembled impact wheel as claimed in claim 3, characterized in that: The assembly holes are arranged on the side wall of the wheel disc where the concave groove is located. The assembly holes located on the upper side wall penetrate the upper side wall, and the assembly holes located on the lower side wall extend to the middle or lower part of the lower side wall.

5. An assembled impact wheel as claimed in claim 4, characterized in that: The thickness of the bottom of the assembly hole located on the lower side wall from the bottom surface of the lower side wall is 5mm-10mm.

6. An assembled impact wheel as claimed in claim 4, characterized in that: The assembly hole on the handle and / or the assembly hole on the lower side wall is a threaded hole, and the bolt matches the threaded hole and is fixedly assembled.

7. The assembled impact wheel according to claim 3, characterized in that: The positioning mechanism includes a plurality of positioning holes arranged on the circumference of the wheel disc, each handle is provided with a corresponding matching positioning hole, and is positioned by a positioning pin, and the positioning hole is arranged on the upper side wall of the wheel disc where the concave groove is located.

8. An assembled impact wheel according to claim 7, characterized in that: Each group of positioning holes includes two holes, and each group of assembly holes includes one hole. The positioning holes are respectively arranged on both sides of the assembly holes along the axis.

9. The assembled impact wheel according to claim 7, characterized in that: The handle is a cylindrical structure, and assembly planes are arranged on both sides of the cylinder, and the assembly holes and positioning holes are arranged on the assembly planes.

10. An assembled impact wheel according to claim 9, characterized in that: The length of the handle is 1 / 3 to 2 / 5 of the length of the bucket.

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