Auxiliary tool and method for turning over and lifting main shaft of hydraulic generator

Abstract

The invention relates to the technical field of generator installation, and particularly discloses an auxiliary tool and method for turning over and lifting a main shaft of a hydraulic generator. Comprising a turnover assembly detachably installed on the bottom face of a main shaft, a vertical shaft assembly detachably installed on the top face of the main shaft and a transition assembly connected with the vertical shaft assembly and a bridge crane lifting hook. The transition assembly is hinged and matched with the vertical shaft assembly; when the main shaft is turned over and lifted, the turning-over assembly is used as a fulcrum, and the main shaft is converted from a horizontal station to a vertical station through a bridge crane lifting hook. Through cooperation of the transition assembly and the vertical shaft assembly, the situation that the lifting hook is disassembled and assembled before the main shaft is turned over and lifted and after lifting is completed is avoided, and the installation efficiency and construction convenience are improved. The transition assembly, the vertical shaft assembly and the bridge crane lifting hook are connected in a cylindrical pin mode, operation is easy, and the installation precision is high; and corresponding horizontal movement prevention measures are adopted during connection, so that the safety and the reliability in the turnover lifting process are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of generator installation, and more particularly to an auxiliary tool and method for turning over and lifting a main shaft of a hydro-generator. Background Art

[0002] The main shaft is the core component of the hydro-turbine generator set. It is large in size, heavy in weight, and has a large number of important precision-machined surfaces. If the main shaft is damaged during the hoisting process, it will seriously affect the safety and stability of the entire unit. Therefore, the turning over and hoisting of the main shaft is a core influencing factor in the design and installation of the hydro-turbine generator set. Especially for large-capacity suspended hydro-turbine generators with a single shaft structure, the main shaft height can reach 10m and the hoisting weight can reach 100 tons. In this case, the turning over and hoisting of the main shaft is even more important.

[0003] Usually, the main shaft of the turbine generator is transported to the installation site in a flat position (with the axis parallel to the ground). With the help of special lifting tools, the power station bridge crane lifts the main shaft through the hook so that its axis is perpendicular to the ground, and then moves the bridge crane to lift the main shaft to a specific position in the pit. This process is called turning over and lifting the main shaft.

[0004] Since the main shaft must be turned over and hoisted by connecting the hook assembly to the vertical shaft tool through a single pin, the main shaft can be turned from a horizontal position to a vertical position by rotating a single pin. In addition, due to the maximum lifting height of the plant and the minimum length of the heavy-load wire rope, the bridge crane hook and the vertical shaft tool cannot be connected by wire rope.

[0005] According to the structural type of the bridge crane hook group, if the hook is not removed, it can only be connected to the vertical shaft tool through two pins, and the main shaft cannot be turned over during the lifting process.

[0006] The existing spindle turning over and lifting scheme requires removing the hook in the bridge crane hook group, connecting the hook group with the vertical shaft tool using a single pin, and installing the vertical shaft tool on the spindle head. The spindle is turned over and lifted by the bridge crane, and the hook group is reinstalled after the spindle turning and lifting are completed.

[0007] The existing bridge crane hook assembly is connected as a whole through the hook crossbeam, bearing and pulley assembly. The disassembly and installation process of the large-load hook is very cumbersome and time-consuming, which seriously affects the installation progress and construction convenience. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide an auxiliary tool and method for turning over and lifting the main shaft of a hydro-generator;

[0009] The solution adopted by the present invention to solve the technical problem is:

[0010] An auxiliary tooling for turning over and lifting the main shaft of a hydro-turbine generator, used in conjunction with a bridge crane hook, comprises a turning assembly detachably mounted on the bottom surface of the main shaft, a vertical shaft assembly detachably mounted on the top surface of the main shaft, and a transition assembly respectively connected to the vertical shaft assembly and the bridge crane hook; the transition assembly is hingedly matched with the vertical shaft assembly;

[0011] When the main shaft is turned over and lifted, the turning assembly fulcrum is used to transfer the main shaft from the horizontal position to the vertical position through the bridge crane hook.

[0012] In some possible embodiments, the turning assembly includes a connecting steel plate installed on the bottom surface of the spindle and supporting the spindle when the spindle is in a vertical position, and a supporting steel plate connected to the connecting steel plate and supporting the spindle when the spindle is in a horizontal position; the connecting steel plate and the supporting steel plate form an integral body with an L-shaped cross-section.

[0013] In some possible implementations, the side of the connecting steel plate close to the main shaft cooperates with the side of the supporting steel plate close to the outer side of the main shaft to form an L-shaped groove, and the connecting steel plate and the side of the supporting steel plate away from the main shaft have an arc transition.

[0014] In some possible implementations, a small groove connected to the L-shaped groove is provided on one side of the connecting steel plate close to the supporting steel plate.

[0015] In some possible implementations, a pad assembly is provided between the turning assembly and the main shaft, and the pad assembly includes a copper pad provided between the connecting steel plate and the main shaft, and a soft copper belt provided between the outer side surface of the main shaft and the supporting steel plate.

[0016] In some possible implementations, the vertical shaft assembly includes a base mounted on the top surface of the main shaft, and two sets of lifting ears symmetrically mounted on the base and hinged to the transition assembly; the base and the two sets of lifting ears cooperate to form a mounting cavity.

[0017] In some possible implementations, symmetrically arranged pin holes are respectively provided on the two groups of lifting ears; and a through hole is provided on the base for use in conjunction with the lifting hole provided on the top surface of the main shaft.

[0018] In some possible embodiments, the transition assembly includes two sets of vertical plates arranged in parallel and located in the installation cavity, a side plate for connecting the two sets of vertical plates, a steel pipe arranged on the outside of each set of vertical plates and in contact with the inner side of the corresponding lifting ear, a cylindrical pin 1 sleeved in the cavity formed by the two sets of steel pipes, and a protective cover 1 arranged at both ends of the cylindrical pin 1 and located on the outside of the lifting ear;

[0019] The axes of the two groups of steel pipes are in the same straight line and perpendicular to the axis of the main shaft; an inner hole coaxial with and connected to the steel pipe is arranged on the vertical plate.

[0020] In some possible implementations, at least two groups of connection holes are provided on the vertical plate, and cylindrical pins 2 connected to the bridge crane hooks are installed in the connection holes; the axis of the cylindrical pins 2 is parallel to the axial direction of the steel pipe;

[0021] Two protective covers connected to the cylindrical pin are respectively arranged at both ends of the cylindrical pin and located on the outer side of the vertical plate.

[0022] A method for turning over and lifting the main shaft of a hydro-generator, based on the auxiliary tooling described above, specifically comprises the following steps:

[0023] The spindle is transferred to the designated position, supported by a support member, and the axis of the spindle is set horizontally, so that the spindle is in a horizontal position;

[0024] Install the turning assembly to protect the side of the main shaft bottom close to the supporting surface;

[0025] Install the vertical shaft assembly and transition assembly; connect the bridge crane hook with the transition assembly;

[0026] The bridge crane is hoisted, and the bridge crane hook is controlled to slowly lift up, and the main shaft is converted from the horizontal position to the vertical position with the turning assembly as the fulcrum;

[0027] Move the supporting parts away, dismantle the turning assembly, move the bridge crane hook, and lift the main shaft to the designated installation location;

[0028] Separate the vertical shaft assembly from the main shaft to complete the main shaft turning over and lifting process.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention utilizes the cooperation of the transition assembly and the vertical shaft assembly to avoid disassembly and assembly of the hook before the main shaft is turned over and lifted and after the lifting is completed, thereby improving installation efficiency and construction convenience.

[0031] The transition assembly, the vertical shaft assembly and the bridge crane hook of the present invention are all connected by means of cylindrical pins, which are simple to operate and have high installation accuracy; and corresponding anti-horizontal movement measures are taken during connection, further improving the safety and reliability of the turning and lifting process.

[0032] In the present invention, the turning assembly and the main shaft are protected by a copper pad and a soft copper belt when they are engaged, and a small groove is opened at the inner corner of the boot, which strengthens the protection of the shaft force fulcrum during the turning and lifting process and avoids damage to the shaft.

[0033] The turning over and lifting method in the present invention can realize the turning over and lifting of hydro-turbine generators with different lifting heights, lifting weights and lifting interfaces. It only needs to adjust the interface and part size of the installation tool accordingly, and the method of the present invention can be used for turning over and lifting, which has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention connected to the main shaft and the main shaft is in a horizontal position;

[0035] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0036] Figure 3 It is a front view of the turning assembly in the present invention;

[0037] Figure 4 It is a cross-sectional view of the turning assembly in the present invention;

[0038] Figure 5 It is a structural schematic diagram of the neutral shaft assembly of the present invention;

[0039] Figure 6 is a cross-sectional view of the neutral shaft assembly of the present invention;

[0040] Figure 7 is a side view of the transition assembly of the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of the transition component in the present invention;

[0042] Fig. 9 It is a schematic diagram of the connection relationship between the transition assembly, the vertical shaft assembly and the main shaft in the present invention;

[0043] Fig.10 It is a schematic diagram of the connection relationship between the transition assembly and the bridge crane hook in the present invention;

[0044] Fig.11 It is a schematic diagram of the connection relationship between the main shaft, the support member, and the turning assembly in the present invention;

[0045] Fig.12 This is a diagram showing the use of the present invention for turning over and lifting the main shaft;

[0046] Among them: 1. Turning assembly; 11. Connecting steel plate; 111. Lifting hole; 12. Supporting steel plate; 13. Small groove; 2. Vertical shaft assembly; 21. Base; 211. Through hole; 22. Lifting ear; 221. Pin hole; 23. Reinforcement rib plate; 3. Transition assembly; 31. Vertical plate; 311. Connecting hole; 32. Side plate; 33. Steel pipe; 34. Cylindrical pin one; 35. Protective cover one; 36. Cylindrical pin two; 37. Protective cover two; 4. Pad assembly; 41. Copper pad; 42. Soft copper belt; 5. Reinforcement ring; 10. Main shaft; 101. Bottom flange; 20. Bridge crane hook; 30. Support. DETAILED DESCRIPTION

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The present invention is described in detail below.

[0049] like Figure 1-Figure 12 As shown:

[0050] An auxiliary tooling for turning over and lifting the main shaft of a hydro-turbine generator, used in conjunction with a bridge crane hook 20, comprises a turning assembly 1 detachably mounted on the bottom surface of the main shaft 10, a vertical shaft assembly 2 detachably mounted on the top surface of the main shaft 10, and a transition assembly 3 respectively connected to the vertical shaft assembly 2 and the bridge crane hook 20; the transition assembly 3 is hingedly matched with the vertical shaft assembly 2; the bridge crane hook 20 in the present invention is a prior art, and its internal structure is not described in detail here;

[0051] When in use, first install the turning assembly 1 on the bottom surface of the main shaft 10 supported by the support member 30 and in a flat position, and install the support member 30 between the turning assembly 1 and the support surface; then install the vertical shaft assembly 2 on the top surface of the main shaft 10, and hinge the transition assembly 3 with the vertical shaft assembly 2; then connect the bridge crane hook 20 with the transition assembly 3;

[0052] When the main shaft 10 is turned over and lifted, the main shaft 10 is transferred from a horizontal position to a vertical position through the bridge crane hook 20 with the turning assembly 1 as a fulcrum.

[0053] The present invention utilizes the cooperation of the transition assembly 3 and the vertical shaft assembly 2 to avoid disassembly and assembly of the bridge crane hook 20 before and after the main shaft 10 is turned over and lifted, thereby improving installation efficiency and construction convenience.

[0054] In some possible implementations, such as Figure 2-Figure 4 , Fig.11 As shown, the turning assembly 1 includes a connecting steel plate 11 installed on the bottom surface of the spindle 10 and supporting the bottom surface of the spindle 10 when the spindle 10 is in a vertical position, and a supporting steel plate 12 connected to the connecting steel plate 11 and supporting the bottom of the outer side of the spindle 10 when the spindle 10 is in a horizontal position; the connecting steel plate 11 and the supporting steel plate 12 form an integral body with an L-shaped cross section;

[0055] Furthermore, in order to meet the lifting requirements of the turning assembly 1, a lifting hole 111 is provided on the side of the connecting steel plate 11 away from the supporting steel plate 12;

[0056] The side of the supporting steel plate 12 close to the outer side of the main shaft 10 is an arc surface; a coupling hole is provided on the bottom flange 101 of the main shaft 10, and a threaded hole used in conjunction with the coupling hole is provided on the connecting steel plate 11; the turning assembly 1 can be detachably installed on the bottom surface of the bottom flange 101 through the cooperation of the threaded hole, the coupling hole and the bolt; the supporting steel plate 12 is connected to the connecting steel plate 11 and is located on the outside of the bottom flange 101; when the main shaft 10 is in the horizontal position, it will be supported by the supporting member 30; after the turning and lifting of the main shaft 10 is completed, the turning assembly 1 can be removed.

[0057] In some possible embodiments, the connecting steel plate 11 on the side close to the main shaft 10 cooperates with the supporting steel plate 12 on the side close to the outer side of the main shaft 10 to form an L-shaped groove with an L-shaped cross-section, and the connecting steel plate 11 and the supporting steel plate 12 on the side away from the main shaft 10 have an arc transition; the outer side surfaces of the connecting steel plate 11 and the supporting steel plate 12 adopt an arc transition, so that during the turning over and lifting, the turning over and lifting can have an arc-shaped surface through the arc transition, ensuring that it is always in contact with the top surface of the support member 30 during the turning over and lifting, so that the support for the main shaft 10 is more stable.

[0058] In some possible embodiments, a small groove 13 connected to an L-shaped groove is provided on one side of the connecting steel plate 11 close to the supporting steel plate 12, and the small groove 13 is provided at the connection between the connecting steel plate and the supporting steel plate 12 and corresponds to the corner of the bottom surface of the main shaft 10; through the provision of the small groove 13, damage to the rotating shaft during turning over and lifting is avoided, that is, hard contact between the corner of the bottom flange 101 and the sharp corner of the inner side surface of the connection between the connecting steel plate 11 and the supporting steel plate 12 during the turning over and lifting of the main shaft 10 is avoided, thereby avoiding damage to the bottom flange 101.

[0059] In some possible implementations, such as Figure 2As shown, a pad assembly 4 is arranged between the turning assembly 1 and the main shaft 10, and the pad assembly 4 includes a copper pad 41 arranged between the connecting steel plate 11 and the main shaft 10, and a soft copper belt 42 arranged between the outer side of the main shaft 10 and the supporting steel plate 12; the setting of the pad assembly 4 will effectively realize the protection of the contact surface between the main shaft 10 and the turning assembly 1; because the side of the supporting steel plate 12 close to the outer side of the main shaft 10 is an arc surface, the soft copper belt 42 will also be an arc surface.

[0060] In some possible implementations, such as Figure 5 , Figure 6 As shown, the vertical shaft assembly 2 includes a base 21 mounted on the top surface of the main shaft 10, and two sets of lifting ears 22 symmetrically mounted on the base 21 and hinged to the transition assembly 3; the base 21 and the two sets of lifting ears 22 cooperate to form an installation cavity for installing the transition assembly 3; the transition assembly 3 is located in the installation cavity and is hinged to the lifting ears 22;

[0061] Specifically, a lifting hole 111 is provided on the top surface of the main shaft 10, and a through hole 211 cooperating with the lifting hole 111 is provided on the base 21, which cooperates with the bolt to realize the detachable connection between the main shaft 10 and the base 21;

[0062] A reinforcing rib plate 23 for connecting the lifting ear 22 and the base 21 is provided on the base 21 , which can improve the overall rigidity of the vertical shaft assembly 2 . The specific number and structure are determined according to actual needs.

[0063] In some possible implementations, such as Figure 7-Figure 10 As shown, pin holes 221 are respectively provided on the two groups of lifting ears 22; the two groups of pin holes 221 are symmetrically arranged; the transition assembly 3 includes two groups of vertical plates 31 arranged in parallel and located in the installation cavity, a side plate 32 for connecting the two groups of vertical plates 31, a steel pipe 33 arranged on the outside of each group of vertical plates 31 and in contact with the inner side of the corresponding lifting ear 22, a cylindrical pin 34 sleeved in the cavity formed by the two groups of steel pipes 33, and a protective cover 35 arranged at both ends of the cylindrical pin and located on the outside of the lifting ear 22; the two groups of vertical plates 31 are symmetrically arranged and cooperate with the side plates 32 to form an installation cavity with an upper opening; the bridge hook passes through the upper opening and is located in the installation cavity;

[0064] Further, the pin hole 221 is located above the steel pipe 33;

[0065] The axes of the two groups of steel pipes 33 are in the same straight line and perpendicular to the axis of the main shaft 10 ; an inner hole coaxial with and connected to the steel pipe 33 is provided on the vertical plate 31 .

[0066] The two groups of pin holes 221 on the two groups of lifting ears 22 are symmetrically arranged and their axes are in the same straight line and perpendicular to the axis of the main shaft 10. The two ends of the cylindrical pin 34 will pass through the two groups of pin holes 221 respectively; the cylindrical pin 34 is sleeved in the steel pipe 33 and the inner hole, so as to realize the articulation cooperation between the transition assembly 3 and the vertical shaft assembly 2, so that after the bridge crane hook 20 is connected with the transition assembly 3, the bridge crane hook 20 can realize the turning over and lifting of the main shaft 10 by rising in the vertical direction;

[0067] The contact between the steel tube 33 and the inner side of the lifting ear 22 effectively limits the axial movement of the transition assembly 3 along the cylindrical pin 34 during the turning and lifting process of the main shaft 10, thereby avoiding movement.

[0068] The two sets of protective covers 35 are respectively connected to the two ends of the cylindrical pin 34 and are located on the outside of the lifting ear 22, which will effectively prevent the cylindrical pin 34 from moving along its axial direction; during assembly, the side of the protective cover 35 close to the lifting ear 22 will contact and abut against the lifting ear 22.

[0069] In some possible implementations, such as Figure 7 , Figure 8 As shown, at least two groups of connection holes are provided on the vertical plate 31, and a cylindrical pin 2 36 connected to the bridge crane hook 20 is set in the connection hole; the axis of the cylindrical pin 2 36 is parallel to the axial direction of the steel pipe 33;

[0070] Protective covers 37 connected to the cylindrical pin are respectively provided at both ends of the cylindrical pin 36 and located on the outside of the vertical plate 31; two sets of protective covers 37 are respectively connected to the two ends of the cylindrical pin 36 and located on the outside of the vertical plate 31, which will effectively prevent the cylindrical pin 36 from moving along its axial direction in the connecting hole; thereby preventing the bridge crane hook 20 connected to the cylindrical pin 36 as a whole from moving along the axial direction of the cylindrical pin 36.

[0071] Furthermore, reinforcing rings 5 ​​are respectively welded on both sides of the pin hole 221 and located on the lifting ear 22, and on both sides of the connecting hole and located on the vertical plate 31, thereby effectively reinforcing the rigidity of the lifting ear 22 and the vertical plate 31;

[0072] The protective cover 1 35 and the protective cover 2 37 are both disc-shaped. The outer diameter of the protective cover 1 35 is larger than the outer diameter of the cylindrical pin 1 34 , and the outer diameter of the protective cover 2 37 is larger than the outer diameter of the cylindrical pin 2 36 .

[0073] like Figure 1-Figure 12 As shown, a method for turning over and lifting the main shaft of a hydro-turbine generator is based on the auxiliary tooling described above; specifically comprising the following steps:

[0074] The spindle 10 is transferred to a designated position by a transfer device, and the support member 30 is used to support the bottom of the outer side of the spindle 10, and the axis of the spindle 10 is set horizontally, so that the spindle 10 is in a flat position; specifically, the support surface can be the ground;

[0075] Install the turning assembly 1, and use the turning assembly 1 to protect the bottom of the main shaft 10 close to the supporting surface;

[0076] Install the vertical shaft assembly 2 and the transition assembly 3; connect the bridge crane hook 20 with the transition assembly 3;

[0077] The bridge crane is hoisted, and the bridge crane hook 20 is controlled to be slowly lifted, and the main shaft 10 is converted from the horizontal position to the vertical position with the turning assembly 1 as the fulcrum;

[0078] Move the support member 30 away, dismantle the turning assembly 1, move the bridge crane hook 20, and lift the main shaft 10 to the designated installation position;

[0079] Separate the vertical shaft assembly 2 from the main shaft 10. At this time, the vertical shaft assembly 2, the transition assembly 3, and the bridge crane hook 20 will be a whole, completing the turning and lifting process of the main shaft 10;

[0080] The vertical shaft assembly 2, the transition assembly 3, and the bridge crane hook 20 are separated as a whole, that is, the protective cover 1 35, the protective cover 2 37, the cylindrical pin 1 34, and the cylindrical pin 2 36 are removed to separate the bridge crane hook 20, the transition assembly 3, and the vertical shaft assembly 2.

[0081] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An auxiliary tool for turning over and lifting the main shaft of a hydro-generator, used in conjunction with a bridge crane hook, characterized in that: It includes a turning assembly detachably mounted on the bottom surface of the main shaft, a vertical shaft assembly detachably mounted on the top surface of the main shaft, and a transition assembly respectively connected to the vertical shaft assembly and the bridge crane hook; the transition assembly is hingedly matched with the vertical shaft assembly; When the main shaft is turned over and lifted, the turning assembly fulcrum is used to transfer the main shaft from the horizontal position to the vertical position through the bridge crane hook.

2. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 1 is characterized in that: The turning assembly includes a connecting steel plate installed on the bottom surface of the spindle and supporting the spindle when the spindle is in a vertical position, and a supporting steel plate connected to the connecting steel plate and supporting the spindle when the spindle is in a horizontal position; the connecting steel plate and the supporting steel plate form an integral body with an L-shaped cross-section.

3. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 2 is characterized in that: The side of the connecting steel plate close to the main shaft cooperates with the side of the supporting steel plate close to the outer side of the main shaft to form an L-shaped groove, and the connecting steel plate and the side of the supporting steel plate away from the main shaft are in an arc transition.

4. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 3 is characterized in that: A small groove connected to the L-shaped groove is arranged on one side of the connecting steel plate close to the supporting steel plate.

5. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to any one of claims 1 to 4, characterized in that: A pad assembly is arranged between the turning assembly and the main shaft, and the pad assembly includes a copper pad arranged between the connecting steel plate and the main shaft, and a soft copper belt arranged between the outer side surface of the main shaft and the supporting steel plate.

6. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 1 is characterized in that: The vertical shaft assembly comprises a base mounted on the top surface of the main shaft, and two groups of lifting ears symmetrically mounted on the base and hinged to the transition assembly; the base and the two groups of lifting ears cooperate to form a mounting cavity.

7. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 6 is characterized in that: The two groups of lifting ears are respectively provided with symmetrically arranged pin holes; and the base is provided with a through hole for use in conjunction with the lifting hole provided on the top surface of the main shaft.

8. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 7 is characterized in that: The transition assembly includes two sets of vertical plates arranged in parallel and located in the installation cavity, side plates for connecting the two sets of vertical plates, steel pipes arranged on the outside of each set of vertical plates and in contact with the inner side of the corresponding lifting lug, a cylindrical pin set in the cavity formed by the two sets of steel pipes, and a protective cover arranged at both ends of the cylindrical pin and located on the outside of the lifting lug; The axes of the two groups of steel pipes are in the same straight line and perpendicular to the axis of the main shaft; an inner hole coaxial with and connected to the steel pipe is arranged on the vertical plate.

9. The auxiliary tooling for turning over and lifting the main shaft of a hydro-generator according to claim 8 is characterized in that: At least two groups of connection holes are arranged on the vertical plate, and cylindrical pins 2 connected to the bridge crane hook are installed in the connection holes; the axis of the cylindrical pins 2 is parallel to the axial direction of the steel pipe; Two protective covers connected to the cylindrical pin are respectively arranged at both ends of the cylindrical pin and located on the outer side of the vertical plate.

10. A method for turning over and lifting the main shaft of a hydro-generator, characterized in that: Based on the auxiliary tooling according to any one of claims 1 to 9; specifically comprising the following steps: The spindle is transferred to the designated position, supported by a support member, and the axis of the spindle is set horizontally, so that the spindle is in a horizontal position; Install the turning assembly to protect the side of the main shaft bottom close to the supporting surface; Install the vertical shaft assembly and transition assembly; connect the bridge crane hook with the transition assembly; The bridge crane is hoisted, and the bridge crane hook is controlled to slowly lift up, and the main shaft is converted from the horizontal position to the vertical position with the turning assembly as the fulcrum; Move the supporting parts away, dismantle the turning assembly, move the bridge crane hook, and lift the main shaft to the designated installation location; Separate the vertical shaft assembly from the main shaft to complete the main shaft turning over and lifting process.

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