Double-disc asymmetric rotor bracket and tubular hydraulic generator

Abstract

The utility model relates to a double-disc asymmetric rotor support and a tubular hydraulic generator. The double-disc asymmetric rotor bracket comprises a hub, a bracket outer ring, a first disc structure, a second disc structure and a brake ring plate. The first disc structure and the second disc structure are arranged between the hub and the bracket outer ring, so that the rigidity, strength and fatigue resistance of the double-disc asymmetric rotor bracket are improved, and the stability of the double-disc asymmetric rotor bracket in a high-speed rotating state is ensured. Besides, the second disc structure is arranged to be a conical barrel structure, and one end, close to the hub, of the second disc structure is obliquely arranged in the direction towards the first disc structure, so that a double-disc asymmetric rotor bracket structure is realized, the distance from the mass center of the through-flow hydraulic generator rotor to the combined bearing is shortened, and the service life of the through-flow hydraulic generator rotor is prolonged. Therefore, the stability of the shaft system of the tubular hydraulic generator is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a hydro-generator rotor support, in particular to a double-disc asymmetric rotor support and a tubular hydro-generator. Background Art

[0002] The rotor bracket of the bulb-type generator is an important component for supporting the magnetic poles and constructing the circulating cooling air duct. The rotor bracket is in a state of high-speed rotation for a long time, and the magnetic poles evenly distributed on its outer surface will generate huge centrifugal force. In addition, there are other complex forces that make the rigidity and fatigue design of the rotor bracket extremely difficult. In addition, the weight of the rotor bracket itself and the distance between the center of mass of the generator rotor and the combined bearing will seriously affect the stability of the generator shaft system and the design difficulty of the combined bearing.

[0003] The traditional generator rotor bracket is often set to a left-right symmetrical structure. Due to the limitation of structural space, the distance from the generator rotor center of mass to the combined bearing is large, and the winding of the main shaft end is increased, which is not conducive to the stability of the unit shaft system. Utility Model Content

[0004] Based on this, it is necessary to provide a double-disc asymmetric rotor bracket and a cross-flow turbine generator with high rigidity, fatigue resistance and a generator rotor mass center close to the combined bearing.

[0005] A double-disc asymmetric rotor support, comprising:

[0006] Wheel hub;

[0007] The outer ring of the bracket is coaxially arranged with the wheel hub; the wheel hub is located inside the outer ring of the bracket;

[0008] The first disc structure is an annular plate structure arranged along the circumference of the hub; the first disc structure is fixed between the hub and the outer ring of the bracket and is perpendicular to the central axis of the hub;

[0009] The second disc structure is a conical cylindrical structure; the second disc structure is fixed between the wheel hub and the outer ring of the bracket, and is spaced apart from the first disc structure along the center axis of the wheel hub; the conical surface of the second disc structure is inclined relative to the center axis of the wheel hub; in the center axis direction of the wheel hub, the distance between the end of the second disc structure close to the wheel hub and the first disc structure is smaller than the distance between the end of the second disc structure close to the outer ring of the bracket and the first disc structure;

[0010] The brake ring plate is fixed to one end of the outer ring of the bracket and protrudes from the inner wall of the outer ring of the bracket; the brake ring plate is located on a side of the first disc structure away from the second disc structure.

[0011] In one embodiment, a plurality of first reinforcing ribs are circumferentially and spacedly arranged on the inner wall of the outer ring of the bracket; each of the first reinforcing ribs is fixedly connected to the surface of the brake ring plate facing the first disc structure, the inner wall of the outer ring of the bracket, and the surface of the first disc structure facing the brake ring plate.

[0012] In one embodiment, the first disc structure includes a first disc fixedly connected to the inner wall of the outer ring of the bracket and a second disc fixedly connected to the outer wall of the hub; the inner wall of the first disc is fixedly connected to the outer wall of the second disc; the plate thickness of the first disc is greater than that of the first disc; the first reinforcing rib is fixedly connected to the surface of the first disc facing away from the second disc structure.

[0013] In one embodiment, a plurality of second reinforcing ribs are circumferentially and spacedly arranged on the inner wall of the outer ring of the bracket; each of the second reinforcing ribs is fixedly connected to the inner wall of the outer ring of the bracket and the surface of the second disc structure facing away from the first disc structure.

[0014] In one embodiment, the second disc structure includes a third disc fixedly connected to the inner wall of the outer ring of the bracket and a fourth disc fixedly connected to the outer wall of the hub; the inner wall of the third disc is fixedly connected to the outer wall of the fourth disc; the third disc is an annular plate-like structure parallel to the first disc structure; the fourth disc is a conical cylinder with a side wall inclined with respect to the central axis of the hub; the plate thickness of the third disc is greater than the wall thickness of the fourth disc; the second reinforcing ribs are respectively fixedly connected to the inner wall of the outer ring of the bracket and the surface of the third disc facing away from the first disc structure.

[0015] In one embodiment, the radial center line of the hub is spaced from the radial center line of the outer ring of the bracket and is located on the side of the radial center line of the outer ring of the bracket close to the brake ring plate.

[0016] In one embodiment, it further includes a plurality of vertical rib plates; the plurality of vertical rib plates are radially and spacedly arranged along the circumference of the hub; each of the vertical rib plates is fixedly connected to the inner wall of the outer ring of the bracket, the surface of the first disc structure facing the second disc structure, the outer wall of the hub, and the surface of the second disc structure facing the second disc structure.

[0017] In one embodiment, a plurality of radial through holes are spacedly provided on the outer ring of the bracket; the plurality of radial through holes cover the entire side wall of the outer ring of the bracket; the first disc structure is circumferentially and spacedly provided with a plurality of first axial through holes; the second disc structure is circumferentially and spacedly provided with a plurality of second axial through holes.

[0018] In one embodiment, in the axial direction of the hub, the first axial through-hole and the second axial through-hole are aligned; and / or

[0019] Both the first axial through-hole and the second axial through-hole are fan-shaped through-holes; in the circumferential direction of the hub, the size of the fan-shaped through-hole at one end close to the hub is smaller than the size at one end close to the outer ring of the bracket.

[0020] A tubular turbine generator includes the double-disk asymmetric rotor bracket as described above.

[0021] For the above double-disk asymmetric rotor bracket and tubular turbine generator, by providing a first disk structure and a second disk structure between the hub and the outer ring of the bracket, the rigidity and strength and anti-fatigue ability of the double-disk asymmetric rotor bracket are improved, ensuring the stability of the double-disk asymmetric rotor bracket in the high-speed rotation state. In addition, the second disk structure is set as a conical cylinder structure, and one end of the second disk structure close to the hub is inclined in the direction towards the first disk structure, so as to realize the backward shift of the centroid of the double-disk asymmetric rotor bracket, shorten the distance from the rotor of the tubular turbine generator to the combined bearing, and greatly improve the stability of the shafting of the tubular turbine generator. Therefore, the above double-disk asymmetric rotor bracket has high rigidity and strength and fatigue resistance, and at the same time makes the centroid of the generator rotor close to the combined bearing, thus ensuring the stability of the shafting of the tubular turbine generator. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a double-disk asymmetric rotor bracket in a preferred embodiment of the present invention;

[0023] Figure 2 is Figure 1 A partial cross-sectional view of the double-disk asymmetric rotor bracket shown.

[0024] Reference numerals: 100, double-disk asymmetric rotor bracket; 110, hub; 120, outer ring of the bracket; 121, radial through-hole; 130, first disk structure; 131, first disk; 132, second disk; 133, first axial through-hole; 140, second disk structure; 141, third disk; 142, fourth disk; 143, second axial through-hole; 150, brake ring plate; 160, first reinforcing rib; 170, second reinforcing rib; 180, vertical rib plate; a, radial center line of the hub; b, radial center line of the outer ring of the bracket. Detailed Embodiments

[0025] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant attached drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can also be an intermediate element. It can also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements or there can also be one or more intermediate elements.

[0028] In the case of using "comprising", "having", and "including" described herein, unless a clear limiting term is used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be construed as having a quantity of one.

[0029] In addition, the attached drawings are not drawn to a scale of 1:1, and the relative dimensions of each element are only drawn by way of example in the attached drawings and not necessarily to the actual scale.

[0030] The present utility model provides a double-disc asymmetric rotor bracket and a tubular turbine generator. The tubular turbine generator includes a double-disc asymmetric rotor bracket.

[0031] Figure 1 and Figure 2 The structure of the double-disc asymmetric rotor bracket in an embodiment of the present utility model is shown. For the convenience of description, the attached drawings only show the structures related to the embodiments of the present utility model.

[0032] Please refer to Figure 1 and Figure 2 In the preferred embodiment of the present utility model, the double-disc asymmetric rotor bracket 100 includes a hub 110, a bracket outer ring 120, a first disc structure 130, a second disc structure 140, and a brake ring plate 150.

[0033] The outer ring 120 of the support is coaxially arranged with the hub 110. The hub 110 is located inside the outer ring 120 of the support. Among them, the hub 110 is used for connecting with the main shaft flange.

[0034] The first disc structure 130 is an annular plate-like structure arranged along the circumferential direction of the hub 110. The first disc structure 130 is fixed between the hub 110 and the outer ring 120 of the support and is perpendicular to the central axis of the hub 110. Thus, the first disc structure 130 is used to connect the hub 110 and the outer ring 120 of the support and play a vertical supporting role for the outer ring 120 of the support.

[0035] The second disc structure 140 is a conical cylinder structure. The second disc structure 140 is fixed between the hub 110 and the outer ring 120 of the support and is arranged at an interval from the first disc structure 130 along the central axis direction of the hub 110. The conical surface of the second disc structure 140 is inclined with respect to the central axis of the hub 110. In the central axis direction of the hub 110, the distance between the end of the second disc structure 140 close to the hub 110 and the first disc structure 130 is less than the distance between the end of the second disc structure 140 close to the outer ring 120 of the support and the first disc structure 130.

[0036] The brake ring plate 150 is fixed to one end of the outer ring 120 of the support and protrudes from the inner wall of the outer ring 120 of the support. The brake ring plate 150 is located on the side of the first disc structure 130 away from the second disc structure 140. Specifically, the brake ring plate 150 is fixed to the upstream end of the outer ring 120 of the support, so the first disc structure 130 and the second disc structure 140 are arranged at intervals in the direction from the upstream end to the downstream end of the outer ring 120 of the support.

[0037] For the above double-disc asymmetric rotor support 100, by arranging the first disc structure 130 and the second disc structure 140 between the hub 110 and the outer ring 120 of the support, the rigidity and strength and anti-fatigue ability of the double-disc asymmetric rotor support 100 are greatly improved, ensuring the stability of the double-disc asymmetric rotor support 100 in the high-speed rotation state. In addition, the second disc structure 140 is set as a conical cylinder structure, and the end of the second disc structure 140 close to the hub 110 is inclined in the direction towards the first disc structure 130, so as to realize the centroid offset of the double-disc asymmetric rotor support 100, shorten the distance from the cross-flow generator rotor to the combined bearing, and greatly improve the stability of the cross-flow hydro-generator shafting.

[0038] Therefore, the above double-disc asymmetric rotor support 100 has high rigidity and strength and fatigue resistance. At the same time, the double-disc asymmetric rotor support makes the cross-flow generator rotor closer to the combined bearing, thus improving the stability of the cross-flow hydro-generator shafting.

[0039] In some embodiments, a plurality of first reinforcing ribs 160 are circumferentially and spacedly arranged on the inner wall of the outer bracket ring 120. Each first reinforcing rib 160 is fixedly connected to the surface of the brake ring plate 150 facing the first disc structure 130, the inner wall of the outer bracket ring 120, and the surface of the first disc structure 130 facing the brake ring plate 150 respectively.

[0040] The arrangement of the plurality of first reinforcing ribs 160 is to improve the structural strength between the brake ring, the first disc structure 130, and the outer bracket ring 120, which is beneficial to increasing the overall structural strength of the double-disc asymmetric rotor bracket 100.

[0041] Furthermore, in some embodiments, the first disc structure 130 includes a first disc 131 fixedly connected to the inner wall of the outer bracket ring 120 and a second disc 132 fixedly connected to the outer wall of the hub 110. The inner wall of the first disc 131 is fixedly connected to the outer wall of the second disc 132. The plate thickness of the first disc 131 is greater than that of the first disc 131. The first reinforcing rib 160 is fixedly connected to the surface of the first disc 131 facing away from the second disc structure 140.

[0042] In this way, the plate thickness of the first disc 131 is set to be relatively thick, which can reduce the probability of welding deformation of the first disc 131 during the welding process of the first reinforcing rib 160 while ensuring a high supporting strength for the first reinforcing rib 160. And the plate thickness of the second disc 132 is set to be relatively thin to reduce the weight of the first disc structure 130 while ensuring the supporting strength for the outer bracket ring 120, which is beneficial to the lightweight of the double-disc asymmetric rotor bracket 100.

[0043] In some embodiments, a plurality of second reinforcing ribs 170 are circumferentially and spacedly arranged on the inner wall of the outer bracket ring 120. Each second reinforcing rib 170 is fixedly connected to the inner wall of the outer bracket ring 120 and the surface of the second disc structure 140 facing away from the first disc structure 130 respectively.

[0044] The arrangement of the plurality of second reinforcing ribs 170 is to improve the structural strength between the first disc structure 130 and the outer bracket ring 120, which is beneficial to increasing the overall structural strength of the double-disc asymmetric rotor bracket 100.

[0045] Further, in some embodiments, the second disc structure 140 includes a third disc 141 fixedly connected to the inner wall of the outer bracket 120 and a fourth disc 142 fixedly connected to the outer wall of the hub 110. The inner wall of the third disc 141 is fixedly connected to the outer wall of the fourth disc 142. The third disc 141 is an annular plate-like structure parallel to the first disc structure 130. Specifically, the third disc 141 is an annular plate parallel to the first disc structure 130. The fourth disc 142 is a conical cylinder with its side wall inclined relative to the central axis of the hub 110. That is, the small end of the fourth disc 142 is fixedly connected to the hub 110, and the large end of the fourth disc 142 is fixedly connected to the inner wall of the third disc 141. The plate thickness of the third disc 141 is greater than the wall thickness of the fourth disc 142. The second reinforcing rib 170 is fixedly connected to the inner wall of the outer bracket 120 and the surface of the third disc 141 facing away from the first disc structure 130 respectively.

[0046] In this way, the plate thickness of the third disc 141 is set to be relatively thick, which can ensure a high supporting strength for the second reinforcing rib 170 while reducing the probability of welding deformation of the third disc 141 during the welding process of the second reinforcing rib 170. And the plate thickness of the fourth disc 142 is set to be relatively thin to reduce the weight of the second disc structure 140 while ensuring the supporting strength for the outer bracket 120, which is beneficial to the lightweight of the double-disc asymmetric rotor bracket 100.

[0047] Therefore, in the above embodiments, by arranging a plurality of first reinforcing ribs 160 and a plurality of second reinforcing ribs 170, the overall structural strength of the double-disc asymmetric rotor bracket 100 is improved. It has been proved by practice that compared with the traditional single-disc rotor bracket, the above double-disc asymmetric rotor bracket 100 reduces the number and thickness of the supporting rib plates, and the overall weight is reduced by about 20%, greatly reducing the material cost.

[0048] In some embodiments, the radial center line a of the hub 110 and the radial center line b of the outer bracket 120 are spaced apart and located on the side of the radial center line b of the outer bracket 120 close to the brake ring plate 150. It should be noted that the radial center line refers to a reference line perpendicular to the central axis of the workpiece and passing through the center of the workpiece.

[0049] In this way, the position of the hub 110 within the outer bracket 120 is not symmetric with respect to the radial center line b of the outer bracket, so as to ensure that one end of the second disc structure 140 close to the hub 110 is closer to the radial center line b of the outer bracket 120, further realizing the centroid offset of the double-disc asymmetric rotor bracket 100, further shortening the distance from the bulb turbine generator rotor to the combined bearing, and making the stability of the bulb turbine generator shafting higher.

[0050] To further improve the structural stability of the double-disk asymmetric rotor bracket 100, specifically, one end of the first disk structure 130 close to the outer bracket ring 120 and one end of the second disk 132 close to the outer bracket ring 120 are symmetrically arranged with respect to the radial center line b of the outer bracket ring 120.

[0051] In some embodiments, the double-disk asymmetric rotor bracket 100 further includes a plurality of vertical rib plates 180. The plurality of vertical rib plates 180 are radially spaced apart along the circumference of the hub 110. Each vertical rib plate 180 is fixedly connected to the inner wall of the outer bracket ring 120, one side surface of the first disk structure 130 facing the second disk structure 140, the outer wall of the hub 110, and one side surface of the second disk structure 140 facing the second disk structure 140.

[0052] The arrangement of the vertical rib plates 180 can improve the structural strength between the first disk structure 130, the second disk structure 140, the hub 110, and the outer bracket ring 120, making the structure of the double-disk asymmetric rotor bracket 100 more stable and having higher overall rigidity and strength.

[0053] In some embodiments, a plurality of radial through-holes 121 are spaced apart on the outer bracket ring 120. The plurality of radial through-holes 121 cover the entire side wall of the outer bracket ring 120. The first disk structure 130 is circumferentially provided with a plurality of first axial through-holes 133. The second disk structure 140 is circumferentially provided with a plurality of second axial through-holes 143.

[0054] The radial through-holes 121 form the radial air ducts of the double-disk asymmetric rotor bracket 100, and the first axial through-holes 133 and the second axial through-holes 143 together form the axial air ducts of the double-disk asymmetric rotor bracket 100, facilitating the flow of radial air and axial air and improving the heat dissipation effect of the above double-disk asymmetric rotor bracket.

[0055] Specifically, in the axial direction of the hub 110, the first axial through-holes 133 and the second axial through-holes 143 are aligned. Aligning the first axial through-holes 133 and the second axial through-holes 143 makes it easier for the axial air to pass through, further improving the heat dissipation effect.

[0056] Specifically, both the first axial through-holes 133 and the second axial through-holes 143 are fan-shaped through-holes. In the circumferential direction of the hub 110, the size of the fan-shaped through-hole near one end of the hub 110 is smaller than the size near one end of the outer bracket ring 120. In this way, while ensuring the support strength of the first disk structure 130 and the second disk structure 140, it ensures that more air volume of the axial air passing through, further improving the heat dissipation effect.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0058] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A double-disc asymmetric rotor bracket, characterized in that include: Wheel hub; The outer ring of the bracket is coaxially arranged with the wheel hub; the wheel hub is located inside the outer ring of the bracket; The first disc structure is an annular plate structure arranged along the circumference of the hub; the first disc structure is fixed between the hub and the outer ring of the bracket and is perpendicular to the central axis of the hub; The second disc structure is a conical cylindrical structure; the second disc structure is fixed between the wheel hub and the outer ring of the bracket, and is spaced apart from the first disc structure along the center axis of the wheel hub; the conical surface of the second disc structure is inclined relative to the center axis of the wheel hub; in the center axis direction of the wheel hub, the distance between the end of the second disc structure close to the wheel hub and the first disc structure is smaller than the distance between the end of the second disc structure close to the outer ring of the bracket and the first disc structure; The brake ring plate is fixed to one end of the outer ring of the bracket and protrudes from the inner wall of the outer ring of the bracket; the brake ring plate is located on a side of the first disc structure away from the second disc structure.

2. The double-disc asymmetric rotor bracket according to claim 1, characterized in that, The inner wall of the outer ring of the bracket is provided with a plurality of first reinforcing ribs at intervals along the circumferential direction; each of the first reinforcing ribs is respectively fixedly connected to a surface of the brake ring plate facing the first disc structure, the inner wall of the outer ring of the bracket and a surface of the first disc structure facing the brake ring plate.

3. The double-disc asymmetric rotor bracket according to claim 2, characterized in that, The first disc structure includes a first disc fixedly connected to the inner wall of the outer ring of the bracket and a second disc fixedly connected to the outer wall of the hub; the inner wall of the first disc is fixedly connected to the outer wall of the second disc; the plate thickness of the first disc is greater than the plate thickness of the second disc; the first reinforcing rib is fixedly connected to a side surface of the first disc facing away from the second disc structure.

4. The double-disc asymmetric rotor bracket according to claim 1, wherein The inner wall of the outer ring of the bracket is provided with a plurality of second reinforcing ribs at intervals along the circumferential direction; each of the second reinforcing ribs is respectively fixedly connected to the inner wall of the outer ring of the bracket and a side surface of the second disc structure away from the first disc structure.

5. The dual-disc asymmetric rotor bracket according to claim 4, wherein The second disc structure includes a third disc fixedly connected to the inner wall of the outer ring of the bracket and a fourth disc fixedly connected to the outer wall of the hub; the inner wall of the third disc is fixedly connected to the outer wall of the fourth disc; the third disc is an annular plate structure parallel to the first disc structure; the fourth disc is a conical cylinder with side walls inclined relative to the center axis of the hub; the plate thickness of the third disc is greater than the wall thickness of the fourth disc; the second reinforcing ribs are respectively fixedly connected to the inner wall of the outer ring of the bracket and a side surface of the third disc facing away from the first disc structure.

6. The double-disk asymmetric rotor bracket according to claim 1, wherein The radial center line of the wheel hub is spaced apart from the radial center line of the outer ring of the bracket and is located on a side of the radial center line of the outer ring of the bracket close to the brake ring plate.

7. The double-disc asymmetric rotor bracket according to claim 1, wherein It also includes a plurality of vertical rib plates; the plurality of vertical rib plates are radially spaced along the circumference of the hub; each of the vertical rib plates is respectively fixedly connected to the inner wall of the outer ring of the bracket, the side surface of the first disc structure facing the second disc structure, the outer wall of the hub and the side surface of the second disc structure facing the second disc structure.

8. The double-disc asymmetric rotor bracket according to claim 1, characterized in that, A plurality of radial through holes are spaced apart on the outer ring of the bracket; the plurality of radial through holes cover the side wall of the entire outer ring of the bracket; the first disc structure is provided with a plurality of first axial through holes at intervals in the circumferential direction; the second disc structure is provided with a plurality of second axial through holes at intervals in the circumferential direction.

9. The double-disc asymmetric rotor bracket according to claim 8, wherein In the axial direction of the hub, the first axial through hole and the second axial through hole are aligned; and / or Both the first axial through hole and the second axial through hole are fan-shaped through holes; in the circumferential direction of the hub, the size of the fan-shaped through hole near one end of the hub is smaller than the size near one end of the outer ring of the bracket.

10. A tubular turbine generator, characterized in that, It includes the double-disc asymmetric rotor bracket according to any one of claims 1 to 9.

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