General lifting tool for hydro-generator stator

Abstract

The utility model relates to a hoisting tool for water turbine generator stator, which comprises a tool main body, two lower hoisting ropes and an upper hanging rope. When in use, the length of the stator frame can be used to select different first hoisting parts and second hoisting parts to hoist the generator stator. Therefore, one hoisting tool for water turbine generator stator can realize the balanced hoisting of generators of different sizes and specifications, which has high versatility and can greatly reduce the investment cost of the stator hoisting tool in the installation project of the water turbine generator.

Description

Technical Field

[0001] This utility model relates to the field of hydro-generator assembly technology, and in particular to a universal lifting tool for hydro-generator stators. Background Technology

[0002] The stator is an important component of the generator. For wall-mounted generators, the stator has a circular structure. The stator base wall is made of rolled steel plate. The upper and lower ends of the stator base wall are welded to the upper flange and lower flange respectively to form a whole, resulting in poor structural rigidity. Two lifting columns are set opposite each other on the outside of the stator base wall for hoisting the generator stator. Multiple positioning ribs are distributed circumferentially on the inside of the stator base wall. The positioning ribs are welded and fixed to the base wall, and the stator core is snapped onto the positioning ribs.

[0003] Because the outer diameter of a hydro-generator stator is generally large and its weight is relatively heavy, if the stator is directly hoisted using ropes during manufacturing, the stator frame will experience a large radial force from the ropes, easily leading to deformation or elliptic shape. Deformation of the stator frame directly affects the quality of the stator core stacking. A certain gap is required between the stator core and the frame wall. When the generator is running, the stator core expands due to heat, bringing it into contact with the stator frame wall. Heat is conducted to the stator frame wall and then carried away by external water flow, achieving a cooling effect. If the frame is deformed or elliptical, to ensure the roundness of the stator core during lamination, the gap between the stator core and the frame wall cannot be guaranteed at any point, resulting in excessively high localized temperatures in the stator core. In severe cases, this can cause insulation damage or safety accidents.

[0004] The outer diameter of the stator frame varies greatly depending on the project model of the hydro generator. To prevent deformation of the generator stator during hoisting, the traditional approach is to manufacture special hoisting tools according to the outer diameter of the stator frame, with 1 to 2 sets manufactured for each project. Since a large number of generator projects are produced each year, the investment cost of hoisting tools is high. Utility Model Content

[0005] Therefore, it is necessary to provide a universal lifting tool for hydro-generator stators that is highly versatile and can reduce the cost of stator lifting tools.

[0006] A universal lifting tool for the stator of a hydro-generator, characterized in that it comprises: The tool body has a top end and a bottom end, as well as a left end and a right end; the direction in which the top end and the bottom end point to each other is a first direction, and the direction in which the left end and the right end point to each other is a second direction; the left end and the right end each have a plurality of first hanging parts and a plurality of second hanging parts that are spaced apart along the second direction; the tool body also has a lifting part; Two lower suspension ropes are selectively attached to one of the first suspension parts and one of the second suspension parts, respectively; the two lower suspension ropes are also used to be attached to the lifting columns at both ends of the stator frame, respectively; The upper hanging rope is configured to be able to be hung on the lifting part; the upper hanging rope is used to be able to be hung on the hook of the lifting equipment; In the second direction, the lifting part is located between the first hanging part and the second hanging part; in the first direction, the position height of the first hanging part and the second hanging part is equal to or less than the position height of the lifting part.

[0007] The aforementioned universal lifting tool for hydro-generator stators is used by attaching the upper rope to the hook of a lifting device such as a crane; measuring the distance between the two lifting columns on the stator base, and selecting a first lifting part and a second lifting part that are closest to the distance and symmetrically arranged relative to the tool body; attaching the two lower ropes to the selected first and second lifting parts respectively; using the lifting device to lift the tool body upwards until the end of the lower rope away from the tool body is slightly lower than the height of the lifting column of the stator base, then attaching the two lower ropes to the two lifting columns of the stator base respectively, and then using the lifting device to continue to slowly lift the tool body upwards until the generator stator is completely lifted for the process flow.

[0008] Therefore, the aforementioned universal stator lifting tool for hydro-generators can select different first and second lifting sections to lift the generator stator according to the length of the stator base. Thus, a single universal stator lifting tool for hydro-generators can achieve balanced lifting of various generator stators of different sizes and specifications, exhibiting high versatility and significantly reducing the investment cost of stator lifting tools in hydro-generator installation projects. Attached Figure Description

[0009] Figure 1 This is a front view of the universal lifting tool for the stator of a hydro-generator in a preferred embodiment of this utility model; Figure 2 for Figure 1 The BB section view of the general lifting tool for the stator of the hydro-generator is shown. Figure 3 for Figure 1 The diagram shows the AA cross-section of the universal lifting tool for the stator of a hydro-generator.

[0010] Reference numerals: 100. General lifting tool for hydro-generator stator; 110. Tool body; 111. Top end; 112. Bottom end; 113. Left end; 114. Right end; 115. First lifting part; 116. Second lifting part; 1161. Second groove; 117. Lifting part; 118. Main support plate; 119. Cover plate; 1101. Base plate; 1102. End plate; 1103. First lower support 1104. Second lower support rib plate; 1105. First side rib plate; 1106. Second side rib plate; 1107. First reinforcing rib plate; 1108. Second reinforcing rib plate; 1109. Protective plate; 11010. Third reinforcing rib plate; 120. Lower hoisting rope; 130. Upper hanging rope; 10. Stator base; 11. Hoisting column; 20. First direction; 30. Second direction; 40. Third direction. Detailed Implementation

[0011] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0013] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0014] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0015] Appendix Figure 1 The diagram illustrates the structure of a universal lifting tool for a hydro-generator stator according to one embodiment of the present invention. For ease of explanation, the accompanying drawings only show structures relevant to embodiments of the present invention.

[0016] Please see Figure 1 Please see Figures 1 to 3 The universal lifting tool 100 for the stator of a hydro-generator in the preferred embodiment of this utility model includes a tool body 110, two lower lifting ropes 120 and an upper hanging rope 130.

[0017] The tool body 110 has opposing top ends 111 and bottom ends 112, and opposing left ends 113 and right ends 114. The direction in which the top ends 111 and bottom ends 112 point towards each other is designated as a first direction 20, and the direction in which the left ends 113 and right ends 114 point towards each other is designated as a second direction 30. The left ends 113 and right ends 114 each have a plurality of first hanging parts 115 and a plurality of second hanging parts 116, all spaced apart along the second direction 30. The tool body 110 also has a lifting part 117.

[0018] The two lower suspension ropes 120 can be selectively attached to one of the first suspension parts 115 and one of the second suspension parts 116, respectively. The two lower suspension ropes 120 are also used to attach to the lifting columns 11 at both ends of the stator frame 10, respectively.

[0019] The upper rope 130 is configured to be attached to the lifting unit 117. The upper rope 130 is used to attach to the hook of the lifting equipment.

[0020] In the second direction 30, the lifting part 117 is located between the first hanging part 115 and the second hanging part 116. In the first direction 20, the position height of the first hanging part 115 and the second hanging part 116 is equal to or less than the position height of the lifting part 117.

[0021] When the above-mentioned universal hoisting tool 100 for hydro-generator stators is in the working state of hoisting the stator, the top end 111 and the bottom end 112 are the upper and lower ends of the tool body 110, respectively. At this time, the first direction 20 is the vertical direction and the second direction 30 is the horizontal direction.

[0022] For ease of understanding, the following is a simple description of the working process of the above-mentioned universal hoisting tool 100 for lifting the stator of the hydro-generator: (1) Hang the upper rope 130 on the hook of the hoisting equipment such as the crane; (2) Measure the distance between the two lifting columns 11 on the stator base 10, and select a first hanging part 115 and a first second hanging part 116 that are closest to it and symmetrically arranged with respect to the tool body 110; (3) Hang the two lower hanging ropes 120 on the selected first hanging part 115 and second hanging part 116 respectively; (4) Use the hoisting equipment to lift the tool body 110 upward until the end of the lower hanging rope 120 away from the tool body 110 is slightly lower than the height of the lifting column 11 of the stator base, and hang the two lower hanging ropes 120 on the two lifting columns 11 of the stator base 10 respectively; (5) Use the hoisting equipment to continue to lift the tool body 110 slowly upward until the generator stator is completely lifted and the process flow is carried out.

[0023] Therefore, the aforementioned universal stator lifting tool 100 for hydro-generators can select different first lifting parts 117 and second lifting parts 117 according to the length of the stator base 10 to lift the generator stator. Thus, one universal stator lifting tool 100 for hydro-generators can achieve balanced lifting of generator stators of various sizes and specifications, and has high versatility, thereby greatly reducing the investment cost of stator lifting tools in hydro-generator installation projects.

[0024] Please refer to the following: Figure 2 In some embodiments, the first hanging portion 115 and the second hanging portion 116 are both columnar structures extending along a third direction 40 perpendicular to the first direction 20 and the second direction 30, with both ends protruding from the surfaces on both sides of the tool body 110. The two ends of the lower hanging rope 120 are respectively hung on the ends of the corresponding first hanging portion 115 or the corresponding second hanging portion 116. The lower hanging rope 120 is also used to wrap around the side wall of one end of the stator's hanging post away from the tool body 110, so as to hang the stator on the lower hanging rope 120.

[0025] Specifically, both ends of the lower lifting rope 120 form a loop structure. In use, it is only necessary to hang the loop structures at both ends of the lower lifting rope 120 on the first hanging part 115 or the second hanging part 116 respectively to realize the rope hanging action of the lower lifting rope 120 on the first hanging part 115 or the second hanging part 116. The operation is simple and quick. At the same time, it is only necessary to extend the lifting column 11 at one end of the stator base 10 into the upper part of the lower lifting rope 120. As the lifting equipment drives the tool body 110 to slowly rise, the lower lifting rope 120 will be hung on the lifting column 11 of the stator base 10. This simplifies the rope hanging operation of the lower lifting rope 120 on the first hanging part 115, the second hanging part 116 and the lifting column 11 of the stator base 10, making the lifting operation of the above-mentioned universal lifting tool 100 for hydro-generator stators more convenient.

[0026] Furthermore, in some embodiments, both ends of the first hanging part 115 are provided with first grooves (not shown) along the circumferential direction. Both ends of the second hanging part 116 are provided with second grooves 1161 along the circumferential direction. The two ends of the lower hanging rope 120 are respectively hung in the two first grooves or the two second grooves 1161. The provision of the first grooves and the second grooves 1161 can prevent the lower hanging rope 120 from slipping or even slipping off the first hanging part 115 or the second hanging part 116 during the balanced hoisting of the hydro-generator, thereby improving the safety of the hydro-generator stator hoisting process.

[0027] Please refer to the following: Figure 3 Furthermore, in some embodiments, the tool body 110 includes a main support plate 118, a cover plate 119, and a base plate 1101. The main support plate 118 has opposing top ends 111 and bottom ends 112, and opposing left ends 113 and right ends 114. The cover plate 119 and the base plate 1101 are respectively arranged laterally at the ends of the top ends 111 and bottom ends 112 to form an "I"-shaped structure. Both the left ends 113 and right ends 114 are provided with end plates 1102. Each end plate 1102 is fixedly connected to the cover plate 119, the main support plate 118, and the bottom end 112. The first hanging part 115, the second hanging part 116, and the lifting part 117 are all provided on the main support plate 118.

[0028] Thus, the cover plate 119, the base plate 1101, and the two end plates 1102 form a ring around the main support plate 118. Therefore, the cover plate 119 and the base plate 1101 strengthen the structure of the main support plate 118. The "I"-shaped structure formed by the cover plate 119, the base plate 1101, and the main support plate 118, and the end plates 1102 connecting the base plate 1101 and the cover plate 119 and located at the left end 113 or right end 114 of the main support plate 118, further strengthen the structure of the main support plate 118. Therefore, by configuring the tool body 110 as the main support plate 118, cover plate 119, base plate 1101, and end plates 1102, the tool body 110 simultaneously achieves a lighter weight and stronger structural strength. This reduces the probability of deformation or breakage of the tool body 110 during stator hoisting and also reduces the power requirements of the hoisting equipment.

[0029] Of course, in other embodiments, the tool body 110 can also be a structure made of I-beams, or a structure formed by assembling and fixing rods, plates, etc., or a structure obtained by integral molding methods such as casting or 3D printing.

[0030] Furthermore, in some embodiments, both the first hanging part 115 and the second hanging part 116 are spaced apart from the base plate 1101. Each of the two ends of the first hanging part 115 is provided with a first lower support rib 1103. Each first lower support rib 1103 is fixedly connected to the base plate 1101, the main support plate 118, and one end of the corresponding first hanging part 115. Each of the two ends of the second hanging part 116 is provided with a second lower support rib 1104. Each second lower support rib 1104 is fixedly connected to the base plate 1101, the main support plate 118, and one end of the corresponding second hanging part 116.

[0031] Thus, the first and second support ribs are located below their respective first hanging parts 115 and 116, providing support to these parts and improving their structural strength and connection strength with the main support plate 118. Simultaneously, the first support rib increases the structural strength between the main support plate 118, the base plate 1101, and the corresponding first hanging part 115, while the second support rib increases the structural strength between the main support plate 118, the base plate 1101, and the corresponding second hanging part 116. This further enhances the structural strength of the tool body 110, reducing the probability of breakage, deformation, and cracking at the connection points of the first and second hanging parts 115 and 116, thus contributing to the extension of the service life of the universal lifting tool 100 for the hydro-generator stator.

[0032] Furthermore, in some embodiments, both the first hanging portion 115 and the second hanging portion 116 are spaced apart from the cover plate 119. Each of the two ends of the first hanging portion 115 is provided with a first side stiffener 1105. Each first side stiffener 1105 is fixedly connected to the cover plate 119, the main support plate 118, and one end of the corresponding first hanging portion 115. Each of the two ends of the second hanging portion 116 is provided with a second side stiffener 1106. Each second side stiffener 1106 is fixedly connected to the cover plate 119, the main support plate 118, and one end of the corresponding second hanging portion 116.

[0033] Thus, the first side stiffener 1105 and the second side stiffener 1106 are respectively located above their respective first hanging parts 115 and second hanging parts 116, so as to improve the structural strength and connection strength between the first hanging part 115, the main support plate 118 and the cover plate 119 and the second hanging part 116, the main support plate 118 and the cover plate 119, thereby achieving the purpose of further improving the structural strength of the tool body 110.

[0034] To further improve the structural strength of the first hanging part 115 and the second hanging part 116, specifically, the first side stiffener 1105 corresponding to each first hanging part 115 is aligned with the first support stiffener in the first direction 20, and the second side stiffener 1106 corresponding to each second hanging part 116 is aligned with the second support stiffener in the second direction 30.

[0035] Furthermore, in some embodiments, multiple first reinforcing ribs 1107 are provided on both sides of the main support plate 118. The multiple first reinforcing ribs 1107 on each side of the main support plate 118 are spaced apart along the second direction 30. The two sides of each first reinforcing rib 1107 are fixedly connected to the main support plate 118 and the base plate 1101, respectively. A first reinforcing rib 1107 is provided between any two adjacent first hanging parts 115 or between any two adjacent second hanging parts 116. Thus, by providing the first reinforcing ribs 1107, the structural strength of the main support plate 118 is further improved, and the probability of cracking at the connection between the base plate 1101 and the main support plate 118 is reduced, thereby further improving the structural strength of the tool body 110.

[0036] Furthermore, in some embodiments, second reinforcing ribs 1108 are provided on both sides of the main support plate 118. In the second direction 30, the second reinforcing ribs 1108 are located between adjacent first hanging portions 115 and second hanging portions 116. The second reinforcing ribs 1108 are fixedly connected to the cover plate 119, the main support plate 118, and the base plate 1101, respectively. Each side of the main support plate 118 may have one or more second reinforcing ribs 1108. Specifically, when multiple second reinforcing ribs 1108 are provided on each side of the main support plate 118, the multiple second reinforcing ribs 1108 are spaced apart along the second direction 30.

[0037] Thus, the second reinforcing rib 1108 is located in the middle of the main support plate 118. Therefore, the setting of the second reinforcing rib 1108 can improve the structural strength and connection strength of the main support plate 118, cover plate 119 and bottom plate 1101 in the middle, so as to further improve the overall structural strength of the tool body 110.

[0038] Furthermore, in some embodiments, the lifting portion 117 and the cover plate 119 are spaced apart. The lifting portion 117 is a through hole formed on the main support plate 118. A protective plate 1109 is provided at both ends of the lifting portion 117. The protective plate 1109 is located on the side of the lifting portion 117 away from the bottom plate 1101. One end of the protective plate 1109 is fixedly connected to the main support plate 118, and the other end is fixedly connected to the edge of the cover plate 119. The protective plate 1109 is an arc-shaped curved plate that is bent in a direction away from the main support plate 118 in the third direction 40.

[0039] Thus, the protective plate 1109 is located above the lifting section 117, forming an arc-shaped transition surface between the cover plate 119 and the main support plate 118. When the upper rope 130 passes through the lifting section 117 and is hooked onto the hook of the lifting equipment, the upper rope 130 will come into contact with this arc-shaped transition surface. This avoids direct contact between the upper rope 130 and the sharp edges of the upper cover plate 119 and the openings at both ends of the lifting section 117 after it is hooked onto the lifting section 117. This reduces the probability of wear and breakage of the upper rope 130 after long-term use and helps to extend the service life of the upper rope 130.

[0040] Furthermore, in some embodiments, a third reinforcing rib 11010 is provided between the protective plate 1109 and the main support plate 118. The third reinforcing rib 11010 is fixedly connected to the cover plate 119, the main support plate 118, and the protective plate 1109, respectively. The provision of the third reinforcing rib 11010 can improve the structural strength and connection strength of the protective plate 1109, reduce the probability of deformation of the protective plate 1109 due to the downward pressure of the hanging rope 130, thereby extending the service life of the protective plate 1109 and making the general-purpose lifting tool 100 for the hydro-generator stator have a longer service life.

[0041] In some embodiments, there are two lifting parts 117 and two upper hanging ropes 130. The two lifting parts 117 are spaced apart along the second direction 30. The two upper hanging ropes 130 are respectively suspended on the two lifting parts 117. In use, the two upper hanging ropes 130 are respectively suspended on the two lifting parts 117, and can also be simultaneously suspended on the hook of the lifting equipment to lift the tool body 110 from two points, thereby improving the balance of the universal stator lifting tool 100 for hydro-generators during stator lifting and improving the safety of using the universal stator lifting tool 100 for hydro-generators.

[0042] When the lifting part 117 is formed in the through hole on the tool body 110, the two upper hanging ropes 130 pass through the two lifting parts 117 respectively, and both ends of the two upper hanging ropes 130 are hung on the hook of the lifting equipment.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments are merely illustrative of several implementations of this utility model, and 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 those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A universal lifting tool for the stator of a hydro-generator, characterized in that, include: The tool body has a top end and a bottom end, as well as a left end and a right end; the direction in which the top end and the bottom end point to each other is a first direction, and the direction in which the left end and the right end point to each other is a second direction; the left end and the right end each have a plurality of first hanging parts and a plurality of second hanging parts that are spaced apart along the second direction; the tool body also has a lifting part; Two lower suspension ropes are selectively attached to one of the first suspension parts and one of the second suspension parts, respectively; the two lower suspension ropes are also used to be attached to the lifting columns at both ends of the stator frame, respectively; The upper hanging rope is configured to be able to be hung on the lifting part; the upper hanging rope is used to be able to be hung on the hook of the lifting equipment; In the second direction, the lifting part is located between the first hanging part and the second hanging part; In the first direction, the position height of both the first hanging part and the second hanging part is equal to or less than the position height of the lifting part.

2. The universal lifting tool for hydro-generator stators according to claim 1, characterized in that, Both the first and second hanging parts are columnar structures extending along a third direction perpendicular to the first and second directions, and their ends protrude from the surfaces on both sides of the tool body, respectively; the two ends of the lower hanging rope are respectively hung on the two ends corresponding to the first hanging part or the second hanging part; the lower hanging rope is also used to wrap around the side wall of one end of the stator hanging post away from the tool body, so as to hang the stator on the lower hanging rope.

3. The universal lifting tool for hydro-generator stators according to claim 2, characterized in that, Both ends of the first hanging part are provided with a first groove along the circumference; both ends of the second hanging part are provided with a second groove along the circumference; the two ends of the lower hanging rope are respectively hung in the two first grooves or the two second grooves.

4. The universal lifting tool for hydro-generator stators according to claim 2, characterized in that, The tool body includes a main support plate, a cover plate, and a base plate; the main support plate has a top end and a bottom end, as well as a left end and a right end; the cover plate and the base plate are respectively arranged laterally at the ends of the top end and the bottom end to form an "I" shape; both the left end and the right end are provided with end plates; each end plate is fixedly connected to the cover plate, the main support plate, and the bottom end; the first hanging part, the second hanging part, and the lifting part are all provided on the main support plate.

5. The universal lifting tool for hydro-generator stators according to claim 4, characterized in that, Both the first and second hanging parts are spaced apart from the base plate; each of the first hanging parts has a first lower support rib at both ends; each of the first lower support ribs is fixedly connected to the base plate, the main support plate, and one end of the corresponding first hanging part; each of the second hanging parts has a second lower support rib at both ends; each of the second lower support ribs is fixedly connected to the base plate, the main support plate, and one end of the corresponding second hanging part; and / or Both the first hanging part and the second hanging part are spaced apart from the cover plate; each of the first hanging parts has a first side stiffener plate at both ends; each of the first side stiffener plates is fixedly connected to the cover plate, the main support plate and one end of the corresponding first hanging part; each of the second hanging parts has a second side stiffener plate at both ends; each of the second side stiffener plates is fixedly connected to the cover plate, the main support plate and one end of the corresponding second hanging part.

6. The universal lifting tool for hydro-generator stators according to claim 4, characterized in that, Multiple first reinforcing ribs are provided on both sides of the main support plate; the multiple first reinforcing ribs on each side of the main support plate are spaced apart along the second direction; the two sides of each first reinforcing rib are fixedly connected to the main support plate and the base plate respectively; a first reinforcing rib is provided between any two adjacent first hanging parts or between any two adjacent second hanging parts.

7. The universal lifting tool for hydro-generator stators according to claim 6, characterized in that, The main support plate is provided with a second reinforcing rib plate on both sides; in the second direction, the second reinforcing rib plate is located between the adjacent first hanging part and the second hanging part; the second reinforcing rib plate is fixedly connected to the cover plate, the main support plate and the bottom plate respectively.

8. The universal lifting tool for hydro-generator stators according to claim 4, characterized in that, The lifting part is spaced apart from the cover plate; the lifting part is a through hole formed on the main support plate; a protective plate is provided at each end of the lifting part; the protective plate is located on the side of the lifting part away from the bottom plate; one end of the protective plate is fixedly connected to the main support plate, and the other end is fixedly connected to the edge of the cover plate, and the protective plate is an arc-shaped curved plate that bends in the direction away from the main support plate in the third direction.

9. The universal lifting tool for hydro-generator stators according to claim 8, characterized in that, A third reinforcing rib is provided between the protective plate and the main support plate; the third reinforcing rib is fixedly connected to the cover plate, the main support plate and the protective plate respectively.

10. The universal lifting tool for hydro-generator stators according to claim 1, characterized in that, There are two lifting parts and two hanging ropes; the two lifting parts are spaced apart along the second direction; the two hanging ropes are respectively suspended on the two lifting parts.

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