Upper induced draft plate structure of double-ring full-surrounding vertical hydro-generator

Abstract

The utility model discloses an upper induced draft plate structure of a double-circle full-surrounding vertical hydro-generator. The upper induced draft plate structure is composed of an air cover, a sealing ring, an insulating back plate, an insulating sealing plate, a first polyester glass rope, a second polyester glass rope, a third polyester glass rope, a fourth polyester glass rope, a thin polyester felt and a thick polyester felt. The upper induced draft plate is divided into two sections in the radial direction, the radial length of each section is reduced, the rigidity and strength of the upper induced draft plate are improved, and the operation safety of a unit is guaranteed. The motor is directly surrounded from the rotor side to the stator side, and no gap between the motor and the stator is ensured by compressing the heat-resistant rubber strip close to the stator side. The gap between the insulating plate and the rotor is ensured to be 10mm close to the rotor side, the wind path of the unit is ensured in a full-surrounding manner, the air leakage is reduced, the temperature rise during the operation of the unit is effectively ensured, and the operation stability of the unit is improved.

Description

Technical Field

[0001] The utility model relates to the field of vertical hydro-generators, in particular to an upper air guiding plate structure of a double-ring fully enclosed vertical hydro-generator. Background Art

[0002] With the rapid development of the new power system, the proportion of new energy sources such as photovoltaic power generation and wind power generation in the power system is also increasing continuously. The role of hydro-generator sets in the power system has gradually changed from the main power generation to aspects such as phase regulation and frequency modulation, valley filling and peak shaving, and emergency standby, playing an extremely crucial role in strengthening the stability of the power system and improving the economy of the power system. The high-speed pumped storage units that have been put into operation usually have radial end air return, and there is air leakage in the air gap and the axial direction of the magnetic poles. It is necessary to set upper and lower air guiding plates to ensure the normal circulation of the air path. The inner circle side of the upper air guiding plate wraps the gap between the rotor bracket and the yoke, and the outer circle side is in close contact with the stator winding. Due to the limitations of the material and manufacturing process of the upper air guiding plate itself, it is impossible to ensure sufficient rigidity and strength under the required radial dimensions. In addition, it is also relatively difficult to disassemble and assemble the magnetic poles with a single-ring air guiding plate structure. Therefore, there is an urgent need to develop an upper air guiding plate structure of a double-ring fully enclosed vertical hydro-generator with a simple processing technology, convenient installation and maintenance. Summary of the Invention

[0003] In view of this, it is urgent for the utility model to overcome the above defects and provide an upper air guiding plate structure with a simple processing technology, convenient installation and maintenance, easy disassembly and assembly of magnetic poles, and ensuring the safe operation of high-speed pumped storage generator-motors. The technical solution of the utility model is: it is composed of an outer ring air guiding plate, an inner ring air guiding plate, fixed angle steels, brackets, fixed channel steels, heat-resistant rubber strips, insulating plates, joint bolts, stop washers, connecting bolts, and fiberglass ropes. There are 24 pieces evenly distributed in the circumferences of the outer ring air guiding plate and the inner ring air guiding plate, and they are connected together with the fixed channel steels through the fixed angle steels and brackets. The fixed channel steels are welded on the vertical ribs of the upper frame of the generator; a heat-resistant rubber strip is arranged on the outer ring air guiding plate close to the stator side, and is tied with fiberglass ropes to have zero clearance with the stator air hood. An insulating plate is arranged on the inner ring air guiding plate close to the inner circle side, and a 10-mm gap is reserved with the rotor wind baffle; the outer ring air guiding plate and the inner ring air guiding plate are connected between the petals through joint bolts and stop washers; the outer ring air guiding plate and the inner ring air guiding plate are connected through connecting bolts.

[0004] In the above upper air guiding plate structure of the double-ring fully enclosed vertical hydro-generator, the external material of the outer ring air guiding plate is fiberglass material, and the inner part is 19-mm sandwich foam, and the whole is at an angle of 120°; the split contact surface of the outer ring air guiding plate is L-shaped, and ten fastening holes are processed; a part extends obliquely downward in the direction close to the stator on the outer ring air guiding plate, and a part extends in the direction close to the rotor.

[0005] In the above-mentioned upper air guide plate structure of the double-circle fully enclosed vertical hydrogenerator, the external material of the inner air guide plate is fiberglass material, and the inside is 19-mm sandwich foam. The whole is L-shaped with a smooth transition; there are seventeen fastening holes processed on the split contact surface; a part of the inner air guide plate extends horizontally towards the stator direction, and vertically downwards towards the rotor direction, and the bottom is connected to the insulating plate.

[0006] In the above-mentioned upper air guide plate structure of the double-circle fully enclosed vertical hydrogenerator, the material of the fixed angle steel is stainless steel plate. The fixed angle steel is L-shaped as a whole, with a smooth chamfer transition; a U-shaped groove is processed in the center at the top of the fixed angle steel; four equally spaced waist-shaped holes are processed at the bottom of the fixed angle steel, and they are symmetric about the center line of the fixed angle steel.

[0007] In the above-mentioned upper air guide plate structure of the double-circle fully enclosed vertical hydrogenerator, the material of the bracket is stainless steel plate. The main body of the bracket is a seamless steel pipe. Four reinforcing rib plates and a steel plate are welded at the top of the bracket, and a threaded through hole is processed in the center of the top steel plate; four reinforcing rib plates and a rectangular bottom plate are welded at the bottom of the bracket, and four clearance holes are processed at the four corners of the bracket bottom plate.

[0008] In the above-mentioned upper air guide plate structure of the double-circle fully enclosed vertical hydrogenerator, the fixed channel steel is in the form of three rings with different radii; each circumference is divided into 12 segments, and each segment is welded between two arms of the upper frame. The inner two circles of channel steel are connected to the inner air guide plate, and the outer channel steel is connected to the outer air guide plate; a steel plate is welded at each end of the fixed channel steel, and four clearance holes that are symmetric about the center are opened on the steel plate.

[0009] In the above-mentioned upper air guide plate structure of the double-circle fully enclosed vertical hydrogenerator, a U-shaped groove is opened in the middle of the upper part of the heat-resistant rubber strip, and several clearance holes with a diameter of 8 mm are opened on both sides of the groove. The lower part of the heat-resistant rubber strip is a circular hollow structure, and the heat-resistant rubber strip has an allowable compression amount of 2 - 5 mm.

[0010] Due to the adoption of the above scheme, the beneficial effects of the present utility model are as follows:

[0011] 1. The main components applied in the present utility model are all made of fiberglass material, which is easy to cut and process, and the structural form is simple. The upper air guide plate is divided into an inner and an outer circle. The weight of a single-segment air guide plate is light, and it is convenient to disassemble and assemble, which provides convenience for observing above the rotor during the maintenance of the unit, and can be replaced during later maintenance.

[0012] 2. The upper air guide plate structure of the double-loop fully enclosed vertical hydrogenerator in the present utility model is decomposed into two petals in the radial direction, reducing the radial length of each petal, increasing the rigidity and strength of the upper air guide plate, and ensuring the safety of the unit operation. It directly encloses from the rotor side to the stator side, and near the stator side, a compression heat-resistant rubber strip is used to ensure no gap with the stator. It is close to the rotor side to ensure a 10-mm gap between the insulating plate and the rotor, ensuring the air path of the unit in a fully enclosed manner, reducing air leakage, effectively ensuring the temperature rise during the unit operation, and improving the operation stability of the unit. Brief Description of the Drawings

[0013] The following briefly introduces the drawings required for the embodiments:

[0014] Figure 1 It is a schematic diagram of the overall structure of the double-loop fully enclosed upper air guide plate structure;

[0015] Figure 2 It is a detailed drawing of the outer air guide plate structure of the double-loop fully enclosed upper air guide plate structure;

[0016] Figure 3 It is a detailed drawing of the inner air guide plate structure of the double-loop fully enclosed upper air guide plate structure;

[0017] Figure 4 It is a front view of the fixed angle steel structure of the double-loop fully enclosed upper air guide plate structure;

[0018] Figure 5 It is a top view of the fixed angle steel structure of the double-loop fully enclosed upper air guide plate structure;

[0019] Figure 6 It is a detailed drawing of the support structure of the double-loop fully enclosed upper air guide plate structure;

[0020] Figure 7 It is a detailed drawing of the fixed channel steel structure of the double-loop fully enclosed upper air guide plate structure;

[0021] Figure 8 It is a cross-sectional view of the binding of the heat-resistant rubber strip and the fiberglass rope of the double-loop fully enclosed upper air guide plate structure.

[0022] Description of the component labels in the drawings:

[0023] 1 - Outer air guide plate; 2 - Inner air guide plate; 3 - Fixed angle steel; 4 - Support; 5 - Fixed channel steel; 6 - Heat-resistant rubber strip; 7 - Insulating plate; 8 - Seam bolt; 9 - Lock washer; 10 - Connecting bolt; 11 - Fiberglass rope. Detailed Embodiment

[0024] The following clearly and completely describes the technical solutions of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0025] As Figures 1 to 8 shown, a structure of an upper air guide plate of a double - loop fully - enclosed vertical water - turbine generator is composed of an outer - loop air guide plate 1, an inner - loop air guide plate 2, a fixed angle steel 3, a bracket 4, a fixed channel steel 5, a heat - resistant rubber strip 6, an insulating plate 7, a joint bolt 8, a stop washer 9, a connecting bolt 10, and a glass fiber rope 11. There are 24 pieces evenly distributed on the circumference of the outer - loop air guide plate and the inner - loop air guide plate respectively, and they are connected together with the fixed channel steel through the fixed angle steel and the bracket. The fixed channel steel is welded on the vertical ribs of the upper frame of the generator. A heat - resistant rubber strip is arranged on the outer - loop air guide plate near the stator side, and is tied with a glass fiber rope to have zero clearance with the stator air hood. An insulating plate is arranged on the inner - loop air guide plate near the inner - circle side, and there is a 10 - mm gap reserved with the rotor wind baffle. The outer - loop air guide plate and the inner - loop air guide plate are connected between the petals through the joint bolt and the stop washer. The outer - loop air guide plate and the inner - loop air guide plate are connected through the connecting bolt.

[0026] Further, the external material of the outer - loop air guide plate 1 is selected as fiberglass, and the internal material is selected as sandwich foam. The whole is made into a 120° angle, keeping horizontal near the rotor side, slanting downward near the stator side, and having a smooth transition between the two sections. The split - contact surface of the outer - loop air guide plate 1 is made into an L - shape, and ten fastening holes are processed. The outer - loop air guide plate 1 extends obliquely downward in a part in the direction close to the stator, which is convenient for connecting with the heat - resistant rubber strip 6. It extends a part in the direction close to the rotor, which is convenient for connecting with the inner - loop air guide plate 2.

[0027] Further, the external material of the inner - loop air guide plate 2 is selected as fiberglass, and the internal part is selected as sandwich foam. The whole is made into an L - shape with a smooth transition. The inner - loop air guide plate 2 keeps horizontal near the stator side, is perpendicular downward near the rotor side, and has a smooth transition between the two sections. Seventeen fastening holes are processed on the split - contact surface. The inner - loop air guide plate 2 extends horizontally in a part in the direction close to the stator, so as to connect with the outer - loop air guide plate 1. It extends vertically downward in the direction close to the rotor, and the bottom is connected with the insulating plate 7. The gap between the insulating plate 7 and the rotor is 10 mm, and the air path on the rotor side is determined in an enclosing manner.

[0028] Further, the material of the fixed angle steel 3 is selected as stainless - steel plate. The fixed angle steel 3 is in an L - shape as a whole, and the chamfer has a smooth transition. A U - shaped groove is processed in the middle of the top of the fixed angle steel 3, which is convenient for adjusting the position of the bracket 4. Four equally - spaced waist - shaped holes are processed at the bottom of the fixed angle steel 3, which are symmetric about the center line of the fixed angle steel, and are convenient for connecting with the outer - loop air guide plate 1 and the inner - loop air guide plate 2.

[0029] Furthermore, the material of the support 4 is selected as a stainless steel plate. The main body of the support 4 is a seamless steel pipe. Four reinforcing rib plates and a bottom steel plate are welded at the bottom of the support. A threaded through-hole is machined in the center of the bottom steel plate for connecting with the fixed angle steel 3. Four reinforcing rib plates and a rectangular steel plate are welded at the top of the support. Four clearance holes are machined at the four corners of the rectangular steel plate for connecting with the fixed channel steel 5.

[0030] Furthermore, the fixed channel steel 5 is composed of three rings with different radii. Each circumference is divided into 12 segments, and each segment is welded between two arms of the upper machine frame. The two inner types are connected to the inner air guide plate 2, and the one outer type is connected to the outer air guide plate 1. Two steel plates are welded at both ends of the fixed channel steel 5, and 4 clearance holes which are centrosymmetric are drilled in the steel plates, corresponding to the top steel plate of the support 4.

[0031] Furthermore, a U-shaped groove is machined in the middle of the upper part of the heat-resistant rubber strip. A number of clearance holes with a diameter of 8 mm are drilled on both sides of the groove. The lower part of the heat-resistant rubber strip is a circular hollow structure. The heat-resistant rubber strip has an allowable compression amount of 2 - 5 mm. No gap with the stator is ensured through compression.

[0032] Specifically, the upper air guide plate structure of the double-ring fully enclosed vertical water turbine generator applied in the present utility model is decomposed into two segments in the radial direction, reducing the radial length of each segment, increasing the rigidity and strength of the upper air guide plate, and ensuring the operation safety of the unit. It directly surrounds from the rotor side to the stator side. No gap with the stator is ensured by compressing the heat-resistant rubber strip near the stator side. It is close to the rotor side to ensure a 10-mm gap between the insulating plate and the rotor. The air path of the unit is ensured in a fully enclosed manner, reducing air leakage, effectively ensuring the temperature rise during the operation of the unit, and improving the operation stability of the unit.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them. Those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some or even all of the technical features; however, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator, characterized in that: It is composed of an outer ring air induction plate (1), an inner ring air induction plate (2), a fixed angle steel (3), a bracket (4), a fixed channel steel (5), a heat-resistant rubber strip (6), an insulating plate (7), a joint bolt (8), a stop washer (9), a connecting bolt (10), and a glass fiber rope (11). The outer ring air induction plate (1) and the inner ring air induction plate (2) are evenly distributed on the circumference, and are connected together with the fixed angle steel (3), the bracket (4) and the fixed channel steel (5). The fixed channel steel (5) is welded on the generator. On the frame vertical ribs; a heat-resistant rubber strip (6) is arranged near the stator side of the outer ring air induction plate (1), which is tied with a glass wire rope (11) to have a zero gap with the stator air cover; an insulating plate (7) is arranged near the inner circle side of the inner ring air induction plate (2), and a 10 mm gap is reserved with the rotor wind shield; the outer ring air induction plate (1) and the inner ring air induction plate (2) are connected between the petals by joint bolts (8) and stop washers (9); the outer ring air induction plate (1) and the inner ring air induction plate (2) are connected by connecting bolts (10).

2. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The outer ring air induction plate (1) is made of glass fiber reinforced plastic material on the outside and 19 mm sandwich foam on the inside, with an overall angle of 120°; the petal contact surface of the outer ring air induction plate (1) is L-shaped and has ten engagement holes; the outer ring air induction plate (1) extends a portion obliquely downward close to the stator and a portion close to the rotor side.

3. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The inner ring air induction plate (2) is made of glass fiber reinforced plastic on the outside and 19 mm sandwich foam on the inside. The overall shape is L-shaped with a smooth transition. Seventeen engagement holes are processed on the petal contact surface. A portion of the inner ring air induction plate (2) extends horizontally toward the stator and extends vertically downward toward the rotor, and the bottom is connected to the insulating plate (7).

4. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The fixed angle steel (3) is made of a stainless steel plate. The fixed angle steel (3) is L-shaped as a whole, with a smooth chamfer transition. A U-shaped groove is processed in the center of the top of the fixed angle steel (3). Four waist-shaped holes with equal spacing are processed at the bottom of the fixed angle steel (3), and the center line of the fixed angle steel (3) is symmetrical.

5. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The material of the bracket (4) is a stainless steel plate, the main body of the bracket (4) is a seamless steel pipe, four reinforcing rib plates and a steel plate are welded on the top of the bracket (4), and a threaded through hole is processed in the center of the top steel plate; four reinforcing rib plates and a rectangular bottom plate are welded on the bottom of the bracket (4), and four light holes are processed at the four corners of the bottom plate of the bracket (4).

6. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The fixed channel steel (5) is in the form of three rings with different radii; each circle is divided into 12 petals, each petal is welded between two support arms of the upper frame, the two inner rings of channel steel are connected to the inner ring air induction plate (2), and the outer ring of channel steel is connected to the outer ring air induction plate (1); a steel plate is welded to each end of the fixed channel steel (5), and the steel plate has four centrally symmetrical light holes.

7. The double-circle fully enclosed upper wind guide plate structure of a vertical hydro-turbine generator according to claim 1, characterized in that: The upper middle of the heat-resistant rubber strip (6) is provided with a U-shaped groove, and a plurality of light holes with a diameter of 8 mm are provided on both sides of the groove. The lower part of the heat-resistant rubber strip (6) is a circular hollow structure, and the heat-resistant rubber strip (6) has an allowable compression amount of 2-5 mm.

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