Assembly type impact rotating wheel

Abstract

The utility model discloses an assembly type impact 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 flying and breaking of the water bucket are reduced through multiple guarantees, and safe and stable operation of the whole unit is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to an assembly type impulse runner and belongs to the technical field of hydroelectric generating set devices. BACKGROUND

[0002] The impulse runner is a core component of the impulse hydroelectric generating set and is composed of a runner disc and buckets. It is usually formed in two ways, namely, integral forming and assembly forming after separate processing. The integral forming is limited by the complex curved surface of the buckets and the small distance between the buckets, so it has a long cycle and is difficult to implement. The assembly forming is usually selected, that is, the buckets and the runner disc are manufactured separately and then assembled or welded together. This method has a small processing difficulty and a short cycle, but the overall strength of the runner is poor, and the complex stress during the operation of the runner can easily lead to bolt fatigue fracture and even cause serious accidents such as bucket breakage.

[0003] CN114109694A discloses a combined impulse water turbine runner, which has a relatively complex structure and a runner disc with unsatisfactory overall structural integrity. SUMMARY

[0004] The present utility model aims to provide an assembly type impulse runner that has a simple structure, is more compact, and has good reliability.

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

[0006] An assembly type impulse runner includes a runner disc and a plurality of buckets assembled on the circumference of the runner disc. The circumferential sidewall of the runner disc is provided with a concave groove. The bucket includes a bucket body and a bucket handle. The bucket is assembled in the concave groove through the bucket handle. The bucket handle is positioned by a positioning mechanism and is fixedly assembled on the runner disc by a fixing structure.

[0007] Further, the runner disc is integrally manufactured by processing the concave groove.

[0008] Further, the fixing structure includes a plurality of groups of assembly holes arranged in an array on the circumference. Each group of assembly holes includes at least one assembly hole. Each bucket handle is provided with assembly holes matched with each group, and the bucket handle is fixedly assembled by bolts.

[0009] Further, the assembly holes are arranged on the sidewall of the runner disc where the concave groove is located. The assembly holes on the upper sidewall penetrate the upper sidewall, and the assembly holes on the lower sidewall extend to the middle or lower part of the lower sidewall.

[0010] Further, the thickness of the bottom of the assembly holes on the lower sidewall from the bottom surface of the lower sidewall is 5mm-10mm.

[0011] Further, the assembly hole on the bucket handle and / or the assembly hole on the lower side are threaded holes, and the threaded holes are matched with bolts for fixed assembly.

[0012] Further, the positioning mechanism comprises a plurality of sets of positioning holes arranged on the circumference of the wheel disc, each bucket handle is provided with a corresponding matched positioning hole, and the positioning holes are positioned by a positioning pin.

[0013] Further, each set of positioning holes comprises two positioning holes, and each set of assembly holes comprises one assembly hole.

[0014] Further, the bucket handle is a cylindrical structure, and assembly planes are arranged on both sides of the cylindrical structure, and the assembly holes and the positioning holes are arranged at the assembly planes.

[0015] Further, the length of the bucket handle is 1 / 3-2 / 5 of the length of the bucket.

[0016] In summary, due to the adoption of the technical scheme, the present application has the following beneficial effects:

[0017] 1. The assembled impact type runner has stable structure, high reliability and is easy to realize, thereby ensuring the safe and stable operation of the entire unit.

[0018] 2. The assembled impact type runner is assembled by using at least two positioning holes for assembly, and the positioning holes are positioned in a straight line to accurately position the assembly holes during assembly of the bucket. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the present application;

[0020] Figure 2 is a top view of the wheel disc of the present application;

[0021] Figure 3 is a sectional view of the wheel disc of the present application;

[0022] Figure 4 is one of the schematic views of the bucket of the present application;

[0023] Figure 5It is the water bucket schematic diagram two of the utility model.

[0024] Mark in drawing: 1-wheel disc, 2-concave groove, 3-water bucket, 4-bucket handle, 5-bucket, 6-assembly hole, 7-positioning hole, 8-assembly plane. DETAILED DESCRIPTION

[0025] The utility model will be explained in detail below in combination with drawings.

[0026] In order to make the utility model purposes, technical scheme and advantages more clear and obvious, the utility model will be explained in further detail below in combination with drawings and examples.It should be understood that the specific examples described here are only used to explain the utility model and not used to limit the utility model.

[0027] Embodiment

[0028] A kind of assembly type impulse runner, as shown in Figures 1-5 It includes wheel disc 1 and multiple water buckets 3 assembled on the circumference of wheel disc 1, the circumferential side wall of wheel disc 1 is provided with concave groove 2, water bucket 3 includes bucket 5 and bucket handle 4, water bucket 3 is assembled in concave groove 2 by bucket handle 4, bucket handle 4 is positioned by positioning mechanism and is fixedly assembled on wheel disc 1 by fixed structure.

[0029] In the embodiment, in the specific structure design, relative to traditional structure, the simple combination of positioning and fixed assembly is used to realize the assembly of the whole structure, especially applied to test prototype or small hydropower station, the structure design is simple, and on-site assembly is quick and effective, and subsequent maintenance is relatively quick and simple, not only effectively reduces cost, but also further reduces the workload of manual work, further improves the assembly efficiency of the whole water wheel.

[0030] In the above specific structure design, as a more specific design, wheel disc 1 is made in one piece and is made by machining concave groove 2.In the design of the structure, the milling groove mode is used on the circumferential outside of wheel disc 1 to realize the machining and forming of concave groove 2.

[0031] As a more specific design, the fixed mechanism includes multiple groups of assembly holes 6 distributed in a circumferential array, each group of assembly holes 6 includes at least one assembly hole 6, each bucket handle 4 is provided with assembly hole 6 matched with each group, and is fixedly assembled by bolt.

[0032] For further design, as a more specific design, assembly hole 6 is arranged on the side wall of wheel disc 1 where concave groove 2 is located, the assembly hole 6 located on the upper side wall penetrates 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.

[0033] More specifically, the bottom of the assembly hole 6 on the lower side wall is 5-10 mm from the bottom surface of the lower side wall.

[0034] In the above specific structural design, the threaded hole does not pass through the entire wheel disc 1, and the entire structure is fixed by means of bolts. In a more specific design, the assembly hole 6 on the bucket handle 4 and / or the assembly hole 6 on the lower side wall are threaded holes, and the bolts are matched with the threaded holes and fixedly assembled. Of course, in the structural design, the structure that can be adopted is that the assembly hole 6 is an internally threaded hole, and the clearance problem of the assembly hole 6 is solved by this design, and the assembly hole 6 on the bucket handle 4 and the assembly hole 6 on the lower side wall are threaded holes.

[0035] 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, and each bucket handle 4 is provided with a corresponding matching positioning hole 7 and is positioned by a positioning pin. The positioning hole 7 is arranged on the upper side wall of the wheel disc 1 where the concave groove 2 is located.

[0036] In order to ensure the accuracy of positioning and take into account the alignment effect of the assembly hole 6, the specific design includes 2 positioning holes 7 in each group, 1 assembly hole 6 in each group, and the positioning hole 7 is arranged on both sides of the assembly hole 6 along the axis.

[0037] In the above specific structural design, as a specific implementation, the number of water buckets 3 is 22 groups, the wheel disc 1 is provided with 22 assembly holes 6 arranged in a circumferential array, and 22 groups of positioning holes 7 are arranged. Each group of positioning holes 7 has 2 positioning holes 7, and the positioning pin is assembled first and then the bolt is screwed in for pulling and fitting to realize the assembly of the overall structure.

[0038] Based on the above specific structural design, the bucket handle 4 is a cylindrical structure, and the assembly plane 8 is arranged on both sides of the cylindrical structure. The assembly hole 6 and the positioning hole 7 are arranged at the assembly plane 8.

[0039] Based on the overall force, the length of the bucket handle 4 is 1 / 3-2 / 5 of the length of the bucket 5. In addition, the length of the bucket handle 4 is 4-6 mm less than the depth of the concave groove 2 for assembling the bucket handle 4.

[0040] In summary:

[0041] 1. The assembled impact type runner has stable structure, high reliability, and is easy to implement, thereby ensuring safe and stable operation of the entire unit. The reliability is high, the stress condition of the water bucket root is optimized, the stress is more uniform during operation of the unit, and multiple safeguards reduce the risk of water bucket flying and breaking, thereby ensuring safe and stable operation of the entire unit.

[0042] 2. The utility model discloses a kind of assembled impact type runner, at least 2 positioning holes are used to assemble on assembly, the accurate positioning of assembly hole in bucket assembly process is made by the positioning on straight line, while in the design of structure, positioning bolt and assembly bolt three components are positioned and fixed assembly, and simultaneously provide bearing capacity, fully guarantee the risk of runaway, fracture on the application of small impact type water turbine, provide strong guarantee for the safe and stable operation of entire unit.

[0043] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A packaged impulse runner characterized by: The invention relates to a wheel disc and a plurality of water buckets assembled on the circumference of the wheel disc, wherein a concave groove is arranged on the circumferential wall of the wheel disc, the water bucket comprises a bucket body and a bucket handle, the water bucket is assembled in the concave groove through the bucket handle, the bucket handle is positioned by a positioning mechanism and is fixedly assembled on the wheel disc by a fixing structure.

2. A packaged impulse runner as claimed in claim 1, characterized in that: The wheel disc is integrally manufactured and is manufactured by machining the concave groove.

3. A packaged impulse turbine according to claim 1 or 2, wherein: The fixing structure comprises a plurality of groups of assembly holes arranged in an array on the circumference, each group of assembly holes comprises at least one assembly hole, each bucket handle is provided with assembly holes matched with each group, and the assembly holes are fixedly assembled by bolts.

4. A packaged impulse runner as claimed in claim 3 wherein: The assembly holes are arranged on the side wall of the wheel disc where the concave groove is located, the assembly holes on the upper side wall penetrate the upper side wall, and the assembly holes on the lower side wall extend to the middle or lower part of the lower side wall.

5. A packaged impulse runner as claimed in claim 4 wherein: The thickness of the bottom of the assembly holes on the lower side wall from the bottom surface of the lower side wall is 5-10 mm.

6. A packaged impulse runner as claimed in claim 4, wherein: The assembly holes on the bucket handle and / or the assembly holes on the lower side wall are threaded holes, the bolts are matched with the threaded holes and are fixedly assembled.

7. A packaged impulse type runner as claimed in claim 3 wherein: The positioning mechanism comprises a plurality of groups of positioning holes arranged on the circumference of the wheel disc, each bucket handle is provided with corresponding matched positioning holes, and the positioning holes are positioned by positioning pins, and the positioning holes are arranged on the upper side wall of the wheel disc where the concave groove is located.

8. A packaged impulse runner as claimed in claim 7, characterized in that: Each group of positioning holes comprises two, and each group of assembly holes comprises one, and the positioning holes are respectively arranged on both sides of the assembly holes along the axis.

9. A packaged impulse type runner as claimed in claim 7, characterized in that: The bucket handle is a cylindrical structure, assembly planes are arranged on both sides of the cylinder, and the assembly holes and the positioning holes are arranged at the assembly planes.

10. A packaged impulse runner as claimed in claim 9, characterized in that: The length of the bucket handle is 1 / 3-2 / 5 of the length of the bucket body.

Images