Split type modularized inclined vertical rib stator base

Abstract

The invention discloses a split type modularized inclined vertical rib stator base which is composed of an upper inclined vertical rib, a lower inclined vertical rib, an upper annular plate, a middle annular plate, a lower annular plate, an inter-annular rib plate, a lower annular circumferential reinforcing plate and a lower annular radial reinforcing plate, the upper inclined vertical rib and the lower inclined vertical rib are combined and fixed to form a main vertical rib structure, all layers of annular plates are welded and fixed in the circumferential direction, and the inter-annular rib plate is vertically welded. The reinforcing plate reinforces the lower annular plate. The main vertical rib structure is decomposed into the upper inclined vertical rib and the lower inclined vertical rib, so that the hoisting height of the stator is compressed, the low-rail integral hoisting of the stator frame can be realized, and the engineering cost is reduced; and the transportation requirements of high-altitude areas are met. The split mode of the main vertical rib structure can optimize the on-site installation process of the generator set, and the requirement for the structural stability of the giant water-turbine generator set is met. And the device can be modularly designed, is suitable for large and giant water-turbine generator sets with different structures and sizes, is flexible in structure, and has wide engineering application and popularization values.

Description

Technical Field

[0001] The invention relates to the field of giant hydroelectric generators, and in particular to a split modular oblique rib stator base. Background Art

[0002] The development of conventional vertical mixed flow giant hydroelectric generator sets in my country has become increasingly mature. With the commissioning of the world's largest single-unit capacity Baihetan hydroelectric generator set, it marks that the world's single-unit capacity of hydroelectric generator sets has entered 1 million kilowatts and entered the hydropower no-man's land. The hydropower construction of the first and second tiers of my country's geographical units is close to saturation. The Qinghai-Tibet Plateau of the third tier of the geographical unit is generally above 4,000 meters above sea level, and there is still huge development potential in the deep areas such as western Sichuan, Yunnan and Guizhou. The hydroelectric units to be developed generally have the characteristics of large capacity, high head, high altitude, imperfect transportation conditions, and difficult engineering construction. The stator frame is an important component of the hydroelectric generator. It must bear all axial loads of the generator stator, upper frame and its receiving components, and it needs to resist the tangential force generated when the stator winding is short-circuited, the unilateral magnetic pull generated when half of the magnetic poles are short-circuited, and the thermal expansion force under the operating conditions used.

[0003] The giant hydroelectric generator set is limited by the capacity of a single unit, and the diameter and structural density of the generator cannot be reduced. The stator frame is the largest component on the outermost side of the generator set. The petal transportation can only change the suspension size, but the axial height cannot be changed. The unit needs to pass through thousands of tunnels and bridges during transportation and installation. Most importantly, this type of unit is mostly an underground plant excavated in the mountain. The rail top elevation of the beam crane in the plant is affected by the stator lifting height, and it must be excavated to a sufficient size in the complex mountain. The huge cost of civil construction operations and engineering difficulty are huge challenges for the entire project. Therefore, there is an urgent need for a new structural stator frame that can be modularly designed and constructed to meet the strength and size requirements of the unit, with appropriate transportation size and lifting height. Summary of the invention

[0004] In view of this, the present invention urgently needs to disclose a split modular oblique rib stator base with a stable structure, which can meet the requirements of transportation in extreme plateau environments, can be dynamically split and disassembled, and has a modular design. The technical solution of the present invention is specifically described as follows: the present invention is composed of upper oblique ribs, lower oblique ribs, an upper ring plate, a middle ring plate, a lower ring plate, an inter-ring rib plate, a lower ring circumferential reinforcement plate, and a lower ring radial reinforcement plate. After the upper oblique ribs and the lower oblique ribs are positioned by a first cylindrical pin, they are fastened and fixed by a first bolt and a first washer to form a main rib structure; the upper ring plate, the middle ring plate, and the lower ring plate are circumferentially welded with main ribs, and the inter-ring rib plate is vertically Each layer of ring plates is lap-welded to fix each layer of ring plates; the lower ring circumferential reinforcement plate and the lower ring radial reinforcement plate are lap-welded vertically to the lower ring plate to form a stator base unit assembly; the edges of the ring plates of each layer of the stator base unit assembly are welded with joint block devices, the upper and lower ring plates of the stator base unit assembly are welded with hanging brackets, the stator base unit assembly is assembled as a whole, the stator base unit assemblies are tightened by joint bolts and joint nuts, the welds between the stator base unit assemblies are welded, and after the joint block devices, hanging brackets, joint bolts and joint nuts are cut off as a whole, the stator base as a whole is fixed to the foundation plate riveted in the poured concrete.

[0005] In the above-mentioned split modular oblique rib stator base, the upper oblique rib is composed of a first top plate, a first bottom plate, a vertical plate, and a detachable pad. The first top plate, the first bottom plate and the vertical plate are welded and fixed. After the detachable pad is positioned by a second cylindrical pin, it is fixed to the upper rib body formed by welding by a second bolt and a second washer.

[0006] In the above-mentioned split modular oblique rib stator frame, the lower oblique ribs are composed of a second top plate, a second bottom plate, and ribs. The ribs are perpendicular to the second top plate and the second bottom plate and are fixed by welding.

[0007] In the above-mentioned split modular oblique rib stator base, the removable pad is processed with a first group of screw holes; the first top plate is drilled with a second group of screw holes at the position of the first group of screw holes; the first bottom plate is processed with a first group of through holes and grooves that are finely processed on all sides; the removable pad and the first top plate are processed with a first pin hole and a second pin hole in the circumferential direction and radial direction.

[0008] In the above-mentioned split modular oblique rib stator base, the upper and lower ends of the vertical plate are provided with first double-sided V-shaped grooves.

[0009] In the above-mentioned split modular oblique rib stator base, the second top plate is processed with a third group of screw holes corresponding to the first group of through holes on the first bottom plate, and is also processed with a second group of through holes and a third pin hole.

[0010] In the above-mentioned split modular oblique rib stator base, the second bottom plate is processed with a fourth pin hole, a third group of through holes and grooves that are finely processed around.

[0011] In the above-mentioned split modular oblique rib stator frame, the upper and lower ends of the ribs are provided with second double-sided V-shaped grooves.

[0012] In the above-mentioned split modular oblique rib stator base, installation gaps are processed at the contact points between the upper ring plate and the middle ring plate on both sides and the lower oblique ribs; and a first single-sided V-shaped groove is opened at the joints on both sides.

[0013] In the above-mentioned split modular oblique rib stator base, the lower ring plate is processed with notches corresponding to the installation positions of the lower oblique ribs; and a third double-sided V-shaped groove is opened at the joints on both sides.

[0014] In the above-mentioned split modular oblique rib stator base, the lower ring circumferential reinforcement plate is processed with equidistant circular holes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention decomposes the main forces of the stator frame of the giant hydro-turbine generator into axial load and circumferential radial expansion and torsion. The main vertical reinforcement structure is decomposed into upper oblique vertical reinforcement and lower oblique vertical reinforcement, and the stator lifting height is compressed, which can realize the overall lifting of the low-orbit stator frame or the overall lifting with the stator core, reduce the excavation of the factory building in the mountain, and reduce the project cost; increase the transportation versatility of the stator frame unit assembly to meet the transportation requirements of high-altitude areas.

[0017] 2. The split main rib structure of the present invention can optimize the on-site installation process of giant turbine units. It is not necessary to first fix the inclined ribs, and the upper ring plate of the stator base can be used as an operating platform. The space around the platform is unobstructed, and multiple people can perform copper ring lead welding and end hoop welding at the end of the stator base, and then fix the rotor part, thereby increasing installation efficiency and operating space.

[0018] 3. After the main rib structure of the present invention is segmented, the stator frame still has good mechanical properties and meets the requirements of structural stability of giant hydro-turbine generator sets.

[0019] 4. The present invention is applicable to large and giant hydro-turbine generator sets of different structures and sizes. The present invention can be modularly designed. The upper and lower inclined ribs are fixed in design, and only the axial size is adjustable. The design requirements of different units can be met by arranging the number of main ribs, the number and spacing of each layer of ring plates, and the density and angle of the supporting rib plates. The present invention has a flexible structure and has a wide range of engineering applications and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief introduction to the drawings required for the embodiments:

[0021] Figure 1 It is an overall schematic diagram of the present invention;

[0022] Figure 2It is a cross-sectional view of the present invention;

[0023] Figure 3 It is a front view of the present invention;

[0024] Figure 4 This is the detailed drawing of the upper inclined reinforcement structure;

[0025] Figure 5 This is the detailed drawing of the lower inclined reinforcement structure;

[0026] Description of component numbers in the figure:

[0027] 1-upper oblique rib; 2-lower oblique rib; 3-first bolt; 4-first washer; 5-first cylindrical pin; 6-upper ring plate; 7-middle ring plate; 8-lower ring plate; 9-inter-ring rib plate; 10-lower ring circumferential reinforcement plate; 11-lower ring radial reinforcement plate; 12-joint block device; 13-hanging; 14-joint bolt; 15-joint nut; 16-first top plate; 17-first bottom plate; 18-vertical plate; 19-detachable pad; 20-second cylindrical pin; 21-second bolt; 22-second washer; 23-second top plate ; 24-second base plate; 25-vertical ribs; 26-first set of screw holes; 27-second set of screw holes; 28-first set of through holes; 29-groove; 30-first pin hole; 31-second pin hole; 32-first double-sided V-shaped groove; 33-third set of screw holes; 34-second set of through holes; 35-third pin hole; 36-fourth pin hole; 37-third set of through holes; 38-second double-sided V-shaped groove; 39-installation gap; 40-first single-sided V-shaped groove; 41-notch; 42-third double-sided V-shaped groove; 43-circular hole. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] like Figure 1-3As shown, a split modular oblique rib stator base is composed of an upper oblique rib 1, a lower oblique rib 2, an upper ring plate 6, a middle ring plate 7, a lower ring plate 8, an inter-ring rib plate 9, a lower ring circumferential reinforcement plate 10, and a lower ring radial reinforcement plate 11. The upper oblique ribs 1 and the lower oblique ribs 2 are positioned by the first cylindrical pin 5, and are fixed by the first bolt 3 and the first washer 4 to form a main rib structure; the upper ring plate 6, the middle ring plate 7, and the lower ring plate 8 are circumferentially welded with the main ribs, and the inter-ring rib plates 9 are perpendicular to the ring plates of each layer and welded to fix the ring plates of each layer; the lower ring circumferential reinforcement plate 10 and the lower ring radial reinforcement plate 11 are welded and fixed perpendicular to the lower ring plate 8 to form a stator base unit assembly; the edges of the ring plates of each layer of the stator base unit assembly are welded with the joint block device 12, the upper and lower ring plates of the stator base unit assembly are welded with the hanging 13, the stator base unit assembly is assembled as a whole, and the stator base unit assemblies are fixed by the joint bolts 14 and the joint nuts 15, and the welds between the stator base unit assemblies are welded. After the joint block device 12, the hanging 13, the joint bolts 14, and the joint nuts 15 are cut off as a whole, the stator base as a whole is fixed to the foundation plate riveted in the poured concrete.

[0030] like Figure 4 As shown, the upper oblique rib is composed of a first top plate 16, a first bottom plate 17, a vertical plate 18, a detachable pad 19, a second cylindrical pin 20, a second bolt 21, and a second washer 22. The first top plate 16, the first bottom plate 17 and the vertical plate 18 are welded and fixed. After the detachable pad 19 is positioned by the second cylindrical pin 20, it is fixed to the oblique rib body formed by welding by the second bolt 21 and the second washer 22.

[0031] like Figure 5 As shown, the lower oblique vertical rib 2 is composed of a second top plate 23, a second bottom plate 24, and vertical ribs 25. The vertical ribs 25 are perpendicular to the second top plate 23 and the second bottom plate 24 and are fixed by welding.

[0032] Specifically, the removable pad 19 is processed with a first group of screw holes 26; the first top plate 16 is drilled with a second group of screw holes 27 at the position of the first group of screw holes 26, and the upper frame support arm falls on the removable pad 19 engaged with the upper inclined vertical rib body, and is permanently welded after adjustment by the pad block, so that the upper frame can be removed separately; the first bottom plate 17 is processed with a first group of through holes 28, and grooves 29 are finely processed around it to increase the contact effect with the tightening bolts; the removable pad 19 and the first top plate 16 are processed with a first pin hole 30 and a second pin hole 31 along the circumferential and radial directions, and the contact surface is locked in two directions on the plane without slipping.

[0033] The upper and lower ends of the vertical plate 18 are provided with first double-sided V-shaped grooves 32 to improve the structural strength.

[0034] The second top plate 23 is processed with a third set of screw holes 33 corresponding to the first set of through holes 28 on the first bottom plate 17, which are used to lock the upper inclined vertical reinforcement 1 to form a main vertical reinforcement structure. The second top plate 23 is processed with a second set of through holes 34, which are the extreme lifting holes in the factory building for removing the upper inclined vertical reinforcement 1, and a third pin hole 35 is processed to ensure that the contact surface of the upper and lower inclined vertical reinforcements does not shift.

[0035] The second bottom plate 24 is processed with a fourth pin hole 36 to ensure that the stator base as a whole and the base plate are not offset, and is processed with a third set of through holes 37 for fixing the stator base and the base plate, and has finely processed grooves 29 around to increase the contact effect with the tightening bolts.

[0036] The upper and lower ends of the vertical rib 25 are provided with second double-sided V-shaped grooves 38 to improve the structural strength.

[0037] Installation gaps 39 are processed at the contact points between the upper ring plate 6 and the middle ring plate 7 and the lower oblique ribs, and a frame structure is formed after insertion and welding. A first single-sided V-shaped groove 40 is opened at the joints on both sides to improve the structural strength.

[0038] The lower ring plate 8 is processed with notches 41 at corresponding positions for installing the lower oblique ribs 2, and a frame structure is formed after being inserted and welded. A third double-sided V-shaped groove 42 is opened at the joints on both sides to improve the structural strength.

[0039] The lower ring circumferential reinforcement plate 10 is processed with equidistant circular holes 43 to realize the return air passage of the unit air cooling cycle and to strengthen and fix the lower ring plate 8.

[0040] Finally, the protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A split modular oblique rib stator frame, characterized in that: The invention is composed of an upper oblique vertical rib (1), a lower oblique vertical rib (2), an upper ring plate (6), a middle ring plate (7), a lower ring plate (8), an inter-ring rib plate (9), a lower ring circumferential reinforcement plate (10), and a lower ring radial reinforcement plate (11). After the upper oblique vertical rib (1) and the lower oblique vertical rib (2) are positioned by a first cylindrical pin (5), they are fastened and fixed by a first bolt (3) and a first washer (4) to form a main vertical rib structure; the upper ring plate (6), the middle ring plate (7), and the lower ring plate (8) are circumferentially welded with the main vertical rib; the inter-ring rib plate (9) is perpendicular to each layer of ring plates and fixed by lap welding; the lower ring circumferential reinforcement plate (10) and the lower ring radial reinforcement plate (11) are fixed by lap welding; ) vertical lower ring plate (8), overlap welding fixed to form stator base unit assembly; the edges of the ring plates of each layer of the stator base unit assembly are welded with joint block devices (12), the upper and lower ring plates of the stator base unit assembly are welded with hanging brackets (13), the stator base unit assembly is assembled into a circle, the stator base unit assemblies are tightened by joint bolts (14) and joint nuts (15), the welds between the stator base unit assemblies are welded, and after the joint block devices (12), hanging brackets (13), joint bolts (14) and joint nuts (15) are cut off as a whole, the stator base as a whole is fixed to the base plate riveted in the poured concrete.

2. The split modular oblique rib stator frame according to claim 1, characterized in that: The upper oblique vertical rib (1) is composed of a first top plate (16), a first bottom plate (17), a vertical plate (18), and a detachable pad (19); the first top plate (16), the first bottom plate (17) and the vertical plate (18) are welded and fixed; the detachable pad (19) is positioned by a second cylindrical pin (20) and then fixed to the upper oblique vertical rib body formed by welding by a second bolt (21) and a second washer (22).

3. The split modular oblique rib stator frame according to claim 1, characterized in that: The lower oblique vertical ribs (2) are composed of a second top plate (23), a second bottom plate (24), and vertical ribs (25). The vertical ribs (25) are perpendicular to the second top plate (23) and the second bottom plate (24) and are fixed by welding.

4. The split modular oblique rib stator frame according to claim 2, characterized in that: The removable backing plate (19) is processed with a first group of screw holes (26); the first top plate (16) is drilled with a second group of screw holes (27) at the position of the first group of screw holes (26); the first bottom plate (17) is processed with a first group of through holes (28) and grooves (29) that are finely processed on all sides; the removable backing plate (19) and the first top plate (16) are processed with a first pin hole (30) and a second pin hole (31) in the circumferential direction and the radial direction.

5. The split modular oblique rib stator frame according to claim 2, characterized in that: The upper and lower ends of the vertical plate (18) are provided with first double-sided V-shaped grooves (32).

6. The split modular oblique rib stator frame according to claim 3, characterized in that: The second top plate (23) is processed with a third group of screw holes (33) corresponding to the first group of through holes (28) on the first bottom plate (17), and is also processed with a second group of through holes (34) and a third pin hole (35).

7. The split modular oblique rib stator frame according to claim 3, characterized in that: The second bottom plate (24) is processed with a fourth pin hole (36), a third group of through holes (37) and a groove (29) that is finely processed around the periphery.

8. The split modular oblique rib stator frame according to claim 3, characterized in that: The upper and lower ends of the vertical rib (25) are provided with second double-sided V-shaped grooves (38).

9. The split modular oblique rib stator frame according to claim 1, characterized in that: Installation gaps (39) are machined at the contact points between the upper ring plate (6) and the middle ring plate (7) and the lower oblique ribs (2); and a first single-sided V-shaped groove (40) is formed at the joints on both sides.

10. The split modular oblique rib stator frame according to claim 1, characterized in that: The lower ring plate (8) is processed with a notch (41) at a position corresponding to the installation of the lower oblique vertical rib (2); and a third double-sided V-shaped groove (42) is opened at the joints on both sides.

11. The split modular oblique rib stator frame according to claim 1, characterized in that: The lower ring circumferential reinforcement plate (10) is processed with equidistant circular holes (43).

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