Bulb tubular hydraulic generator and wall-attached generator stator thereof

Abstract

The utility model relates to a bulb tubular hydraulic generator and a wall-attached generator stator thereof. The wall-attached generator stator comprises a stator base, a plurality of positioning ribs, a high-temperature-resistant soft metal foil adhesive tape made of a non-magnetic heat-conducting soft metal material, and a stator iron core. The positioning rib is directly welded on the inner wall of the stator base, the welding quality is good, and the high-temperature-resistant soft metal foil adhesive tape is directly pasted on the stator base by using the adhesive surface on the high-temperature-resistant soft metal foil adhesive tape, so that the high-temperature-resistant soft metal foil adhesive tape is assembled on the stator base without special equipment, the working procedures are very few, the operation is very simple, and the cost is low. The processing cost of the wall-attached generator stator is reduced, and the production efficiency of the wall-attached generator stator is improved. The high-temperature-resistant soft metal foil adhesive tape is used as the heat conduction layer between the stator base and the stator iron core, the thickness of the material is uniform, a uniform gap between the stator base and the stator iron core can be ensured, the stator iron core can be uniformly contacted with the inner wall of the stator base after being heated and expanded, and a good heat conduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydro-generators, in particular to a bulb tubular hydro-generator and a wall-mounted generator stator thereof. Background Art

[0002] Bulb-type tubular turbine generator sets are generally compact. The wall-mounted stator structure eliminates the ring plate and ribs on the inside of the frame. During unit operation, the stator core generates heat in the alternating magnetic field. This heat causes the stator core to expand, causing the outer diameter of the stator core to rest against the inner wall of the stator frame. This conducts heat to the stator frame, where the outer wall of the stator frame contacts the riverbed, where the flowing water carries away the heat, thereby reducing the temperature of the generator stator. The stator frame material is relatively rigid. If the stator core, after thermal expansion, comes into direct contact with the stator frame, it can easily deform or even damage the stator core, affecting the normal operation and service life of the generator.

[0003] In order to solve the above problems, a metal aluminum layer is sprayed on the part of the stator frame that contacts the stator core. Taking advantage of the softness of the metal aluminum material, the stator core is fully attached to the stator frame when expanding, so as to achieve the purpose of conducting the heat generated by the stator core to the stator frame.

[0004] However, this traditional method of spraying a metal aluminum layer on the part of the stator frame that contacts the stator core has the following problems: 1) The aluminum layer is not sprayed evenly, which can easily cause an inconsistent gap between the stator core and the stator frame. Smaller gaps can easily cause the stator core to warp and deform, while larger gaps prevent the stator core and the stator frame from contacting each other, failing to meet heat dissipation requirements; 2) When spraying metal aluminum on the stator frame, sandblasting must be performed first, followed by aluminum spraying. This requires special equipment, multiple steps, and is cumbersome and costly to operate; 3) After the stator frame is sprayed with metal aluminum, positioning ribs need to be welded to the inner wall of the stator frame. Because the aluminum layer sprayed on the inner wall of the stator frame is made of different materials, the welding effect of the positioning rib plug in the welding hole and the stator frame is affected. Summary of the Invention

[0005] Based on this, it is necessary to provide a bulb tubular hydro-turbine generator and a wall-mounted generator stator thereof with good thermal conductivity, simple manufacture and low processing cost.

[0006] A wall-mounted generator stator comprises a stator frame, a plurality of positioning ribs, a high-temperature-resistant soft metal foil tape made of a non-magnetic, heat-conductive soft metal material, and a stator core; the plurality of positioning ribs are welded and fixed to the inner wall of the stator frame at intervals along the circumference of the stator frame; the high-temperature-resistant soft metal foil tape is adhered to the inner wall of the stator frame where the positioning ribs are not fixed; the stator core is installed in the stator frame and engaged with the positioning ribs; when the stator core is not thermally expanded, a gap is provided between the stator core and the high-temperature-resistant soft metal foil tape; after the stator core is thermally expanded, the stator core and the high-temperature-resistant soft metal foil tape can contact each other.

[0007] In one embodiment, the high-temperature resistant soft metal foil tape includes a soft metal foil made of a non-magnetic thermally conductive soft metal material and a high-temperature resistant thermally conductive adhesive coating formed on one surface of the soft metal foil.

[0008] In one embodiment, when the high-temperature resistant soft metal foil tape is not adhered to the inner wall of the stator core, the high-temperature resistant soft metal foil tape further includes a release paper applied on the high-temperature resistant thermal conductive adhesive coating.

[0009] In one embodiment, the sum of the thickness of the soft metal foil and the thickness of the high-temperature resistant thermal conductive adhesive coating is 0.18 mm to 0.22 mm.

[0010] In one embodiment, the soft metal foil is pure aluminum foil.

[0011] In one embodiment, a plurality of slots are formed on the outer wall of the stator core at intervals along the circumferential direction; and the plurality of positioning ribs are respectively engaged with the plurality of slots in a one-to-one correspondence.

[0012] In one embodiment, the slot is a dovetail slot; and the shape of the positioning rib matches the dovetail slot.

[0013] In one embodiment, a plug welding hole is opened on the positioning rib; the plug welding hole contains solder connecting the inner wall of the stator frame and the positioning rib.

[0014] A bulb tubular hydro-turbine generator is characterized by comprising the wall-mounted generator stator as described above.

[0015] In the aforementioned bulb-type hydro-turbine generator and its wall-mounted generator stator, the positioning ribs are directly welded to the inner wall of the stator frame, resulting in good welding quality. The high-temperature-resistant soft metal foil tape can be directly adhered to the stator frame using its adhesive surface. Therefore, the assembly of the high-temperature-resistant soft metal foil tape on the stator frame does not require specialized equipment, requires very few steps, and is very simple to operate. This significantly reduces the processing cost of the wall-mounted generator stator and improves its production efficiency. Furthermore, the use of high-temperature-resistant soft metal foil tape as the thermal conductive layer between the stator frame and the stator core has a uniform material thickness and good plasticity, ensuring a uniform gap between the stator frame and the stator core. After the stator core expands due to heat, it can evenly contact the inner wall of the stator frame, resulting in good thermal conductivity. Therefore, the aforementioned wall-mounted generator stator combines good thermal conductivity, low processing costs, high production efficiency, and good structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a wall-mounted generator stator in a preferred embodiment of the present utility model;

[0017] Figure 2 for Figure 1 The schematic diagram of the structure of the stator core in the wall-mounted generator stator is shown.

[0018] Explanation of reference numerals: 100, wall-mounted generator stator; 110, stator frame; 120, positioning rib; 130, high-temperature resistant soft metal foil tape; 140, stator core; 141, slot. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] 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 intervening elements may also exist. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also exist.

[0022] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0023] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0024] The utility model provides a bulb tubular hydro-turbine generator and a wall-mounted generator stator 100 thereof. The bulb tubular hydro-turbine generator includes a wall-mounted generator stator.

[0025] Figure 1 The figure shows the structure of the stator of the wall-mounted generator in one embodiment of the present invention. For the sake of convenience, the figure only shows the structure related to the embodiment of the present invention.

[0026] See also Figure 1 In a preferred embodiment of the present invention, the wall-mounted generator stator 100 includes a stator frame 110 , positioning ribs 120 , a high-temperature resistant soft metal foil tape 130 and a stator core 140 .

[0027] A plurality of positioning ribs 120 are welded and fixed to the inner wall of the stator base 110 at intervals along the circumference of the stator base 110. The high-temperature resistant soft metal foil tape 130 is made of a non-magnetic, heat-conductive soft metal material. The high-temperature resistant soft metal foil tape 130 is adhered to the inner wall of the stator base 110 where the positioning ribs 120 are not fixed. The stator core 140 is installed in the stator base 110 and is engaged with the positioning ribs 120. When the stator core 140 is not thermally expanded, there is a gap between the stator core 140 and the high-temperature resistant soft metal foil tape 130. After the stator core 140 is thermally expanded, the stator core 140 and the high-temperature resistant soft metal foil tape 130 can come into contact.

[0028] When processing the wall-mounted generator stator 100, a plurality of positioning ribs 120 are first welded to the inner wall of the stator frame 110 at intervals along the circumference of the stator frame 110. Then, the staff directly sticks the high-temperature resistant soft metal foil tape 130 on the inner wall of the stator frame 110 and avoids the positioning ribs 120. Then, the stator core 140 is installed in the stator frame 110, and a gap is left between the stator core 140 and the high-temperature resistant soft metal foil tape 130. At the same time, the positioning ribs 120 and the stator core 140 are snapped together to form a whole.

[0029] Therefore, the positioning ribs 120 are directly welded to the inner wall of the stator frame 110, resulting in good welding quality. The high-temperature-resistant soft metal foil tape 130 can be directly adhered to the stator frame 110 using its adhesive surface. Therefore, the assembly of the high-temperature-resistant soft metal foil tape 130 on the stator frame 110 does not require specialized equipment, requires very few steps, and is very simple to operate. This significantly reduces the processing cost of the wall-mounted generator stator 100 and improves the production efficiency of the wall-mounted generator stator 100. Furthermore, the use of the high-temperature-resistant soft metal foil tape 130 as the heat-conducting layer between the stator frame 110 and the stator core 140 has a uniform material thickness and good plasticity, ensuring a uniform gap between the stator frame 110 and the stator core 140. After the stator core 140 expands due to heat, it can evenly contact the inner wall of the stator frame 110, resulting in good heat conduction. Therefore, the wall-mounted generator stator 100 has good thermal conductivity, low processing cost, high production efficiency and good structural stability.

[0030] In some embodiments, the high-temperature-resistant soft metal foil tape 130 includes a soft metal foil (not shown) made of a non-magnetic, thermally conductive soft metal material and a high-temperature-resistant, thermally conductive adhesive coating (not shown) formed on one surface of the soft metal foil. The soft metal foil can be made of a soft, non-magnetic material with good thermal conductivity, such as copper, tin, lead, zinc, or aluminum. The high-temperature-resistant, thermally conductive adhesive coating can be a colloid with strong heat resistance and good thermal conductivity, such as high-temperature thermally conductive silicone. To ensure the thermal conductivity of the high-temperature-resistant soft metal foil tape 130, in this embodiment, the soft metal foil is pure aluminum foil.

[0031] In this way, the soft metal foil is made of non-magnetic metal material with good thermal conductivity and relatively soft texture, and the high-temperature resistant thermal conductive adhesive coating is made of a colloid with good thermal conductivity and high temperature resistance. This not only facilitates the high-temperature resistant soft metal foil tape 130 to be directly pasted on the inner wall of the stator base 110, but also ensures that the high-temperature resistant soft metal foil tape 130 has excellent thermal conductivity and high-temperature resistance.

[0032] Furthermore, in some embodiments, when the high temperature resistant soft metal foil tape 130 is not adhered to the inner wall of the stator core 140 , the high temperature resistant soft metal foil tape 130 further includes a release paper (not shown) covering the high temperature resistant thermal conductive adhesive coating.

[0033] When the high-temperature-resistant soft metal foil tape 130 needs to be attached to the inner wall of the stator frame 110, the release paper can be peeled off to expose the high-temperature-resistant thermally conductive adhesive coating, making it easier for the staff to attach the high-temperature-resistant soft metal foil tape 130 to the inner wall of the stator frame 110. The release paper is used to cover the high-temperature-resistant thermally conductive adhesive coating to facilitate the storage, transportation, transfer, and preservation of the high-temperature-resistant soft metal foil tape 130 before use. It also facilitates cutting the high-temperature-resistant soft metal foil tape 130 according to the size and shape of the location on the inner wall of the stator frame 110 to be attached before attachment, making the processing of the wall-mounted generator stator 100 easier.

[0034] Of course, in other embodiments, the high temperature resistant soft metal foil tape 130 can also be stored in a roll before use, that is, the high temperature resistant soft metal foil tape 130 is rolled into a roll.

[0035] Furthermore, in some embodiments, the sum of the thickness of the soft metal foil and the thickness of the high-temperature-resistant thermally conductive adhesive coating is 0.18 mm to 0.22 mm. That is, the distance between the outer surface of the soft metal foil and the outer surface of the high-temperature-resistant thermally conductive adhesive coating is 0.18 mm to 0.22 mm. Thus, the thickness of the high-temperature-resistant soft metal foil tape 130 adhered to the inner wall of the stator frame 110 is 0.18 mm to 0.22 mm, which is an appropriate thickness. This ensures that the wall-mounted generator stator 100 maintains good heat dissipation performance while preventing damage to the stator core 140 due to thermal expansion.

[0036] Please also refer to Figure 2 In some embodiments, a plurality of slots 141 are formed at intervals along the circumferential direction on the outer wall of the stator core 140. The plurality of positioning ribs 120 are respectively engaged with the plurality of slots 141 in a one-to-one correspondence.

[0037] The current structure of the stator core 140 is usually formed by stacking stator punching sheets layer by layer. In the present utility model, a slot 141 is processed on the outer circumferential surface of each stator punching sheet. When the stator core 140 is stacked, the slots 141 on the stator punching sheets are buckled onto the positioning ribs 120 layer by layer to achieve the clamping connection between the stator core 140 and the positioning ribs 120. This not only makes the connection between the stator core 140 and the positioning ribs 120 more stable, but also further simplifies the processing process.

[0038] Of course, in other embodiments, the outer wall of the stator core 140 is formed with multiple protrusion structures at intervals along the circumferential direction, and each positioning rib 120 is formed with a groove that cooperates with the corresponding protrusion structure. The multiple protrusion structures are respectively engaged in the grooves of the multiple positioning ribs 120 one by one to clamp the positioning rib 120 and the stator core 140.

[0039] Furthermore, in some embodiments, the slot 141 is a dovetail slot. The shape of the positioning rib 120 matches the dovetail slot. Thus, the slot 141 is configured as a dovetail slot, and the positioning rib 120 is configured as a trapezoidal bar that matches the dovetail slot, thereby further enhancing the connection stability between the positioning rib 120 and the stator core 140 after the engagement.

[0040] In some embodiments, the positioning ribs 120 are provided with plug welding holes (not shown). The plug welding holes contain solder that connects the inner wall of the stator frame 110 and the positioning ribs 120. Specifically, the plug welding holes penetrate the positioning ribs 120, connecting the inner wall of the stator frame 110 to the outside world. Solder can be added to the plug welding holes for welding. This effectively ensures the welding of the positioning ribs 120 while ensuring that the high-temperature-resistant soft metal foil tape 130 is fully covered on the remaining inner wall of the stator frame 110 where the positioning ribs 120 are not welded, further improving heat dissipation.

[0041] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A wall-mounted generator stator, characterized in that: The invention comprises a stator frame, a plurality of positioning ribs, a high-temperature resistant soft metal foil tape made of a non-magnetic heat-conductive soft metal material, and a stator core; the plurality of positioning ribs are welded and fixed to the inner wall of the stator frame at intervals along the circumference of the stator frame; the high-temperature resistant soft metal foil tape is adhered to the inner wall of the stator frame where the positioning ribs are not fixed; the stator core is installed in the stator frame and engaged with the positioning ribs; when the stator core is not thermally expanded, a gap is formed between the stator core and the high-temperature resistant soft metal foil tape; after the stator core is thermally expanded, the stator core and the high-temperature resistant soft metal foil tape can come into contact.

2. The wall-mounted generator stator according to claim 1, characterized in that: The high-temperature resistant soft metal foil tape comprises a soft metal foil made of a non-magnetic heat-conductive soft metal material and a high-temperature resistant heat-conductive adhesive coating formed on one surface of the soft metal foil.

3. The wall-mounted generator stator according to claim 2, characterized in that: When the high-temperature resistant soft metal foil tape is not adhered to the inner wall of the stator core, the high-temperature resistant soft metal foil tape further comprises a release paper applied on the high-temperature resistant thermal conductive adhesive coating.

4. The wall-mounted generator stator according to claim 2, characterized in that: The sum of the thickness of the soft metal foil and the thickness of the high-temperature resistant thermal conductive adhesive coating is 0.18 mm to 0.22 mm.

5. The wall-mounted generator stator according to claim 2, characterized in that: The soft metal foil is pure aluminum foil.

6. The wall-mounted generator stator according to claim 1, characterized in that: The outer wall of the stator core is formed with a plurality of slots at intervals along the circumferential direction; the plurality of positioning ribs are respectively engaged with the plurality of slots in a one-to-one correspondence.

7. The wall-mounted generator stator according to claim 6, characterized in that: The clamping groove is a dovetail groove; the shape of the positioning rib matches the dovetail groove.

8. The wall-mounted generator stator according to claim 1, characterized in that: A plug welding hole is provided on the positioning rib; the plug welding hole contains welding material for connecting the inner wall of the stator frame and the positioning rib.

9. A bulb tubular hydro-turbine generator, characterized in that: The invention comprises the wall-mounted generator stator according to any one of claims 1 to 8.

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