Integral hoisting device and method for upper rack of generator motor of pumped storage power station

Abstract

The invention belongs to the technical field of hydro-generators, and particularly relates to an integral hoisting device and method for an upper rack of a generator motor of a pumped storage power station. According to the technical scheme, the integral hoisting device for the upper rack of the generator motor of the pumped storage power station comprises a balance beam system, a plurality of connecting steel wire ropes are connected to the lower portion of the balance beam system, a plurality of special hoisting holes are formed in a center body or a supporting arm of the upper rack, and the connecting steel wire ropes are arranged in the special hoisting holes in a penetrating mode. The upper portion of the balance beam system is connected with a plurality of hoisting steel wire ropes which are gathered and then hung on a hook of a bridge crane. The invention provides an integral hoisting device and method for an upper rack of a generator motor of a pumped storage power station, solves the problems of temporary property, uncertainty and implementation difficulty of an existing integral hoisting method and structure of the upper rack, and can safely and conveniently complete the integral disassembly / reassembly of the upper rack in the installation and overhaul process of the upper rack of the generator motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydro-generators, and in particular relates to a device and method for integrally hoisting an upper frame of a generator motor in a pumped storage power station. Background Art

[0002] The upper frame of the generator motor of a pumped-storage power station is mainly composed of a center body (including thrust bearings for suspended generator motors) and support arms. The upper frame is assembled into a whole by means of bolts, nuts, pins, etc. at the installation station on site of the power station, and then hoisted into the unit pit for installation. It is the largest hoisting diameter component of a single generator motor in a pumped-storage power station, and the hoisting weight is generally more than 50 tons (the hoisting weight of the upper frame of a suspended generator motor is more than 100 tons). In addition, when the unit is overhauled (A / B repair) after it is put into commercial operation, the upper frame needs to be disassembled and reinstalled as a whole. At present, the center body and support arms of the upper frame of the generator motor of a pumped-storage power station are separately designed with their own lifting ears or lifting holes, but there is no design for the overall hoisting method and structure of the upper frame. It is necessary to design the hoisting method and structure on site according to the actual situation. See the attached document. Figure 4 Implementation of existing technical solutions for overall hoisting of the upper frame during installation and overhaul of the generator motor upper frame of a pumped storage power station: 1. Select appropriate lifting wire ropes based on the overall weight of the upper frame and arrange them at four points on the circumference at 90 degrees to each other. 2. Connect the hoisting wire rope and the bridge crane, and install the hoist for adjusting the upper frame hoisting level at the appropriate position; 3. Connect the hoisting wire rope to the upper frame. Generally, based on the specific structure of the upper frame, select four points on the circumference that are 90 degrees to each other and are convenient for winding the wire rope. 4. Perform a trial lift on the upper frame and adjust the lifting level of the upper frame; 5. Formal hoisting onto the rack.

[0003] Due to the large diameter and weight of the upper frame, the hoisting wire rope selected on-site was thick and long. This made connecting the wire rope to the upper frame and adjusting the upper frame's level after connection extremely difficult, requiring significant manpower and a long construction period. A single connection and adjustment required more than 10 people and approximately two days. Furthermore, the selection of the connection points between the wire rope and the upper frame, as well as the control of the wire rope's angle during hoisting, were highly arbitrary and lacked theoretical calculations, posing a significant safety hazard. Directly using the upper frame's centerpiece lifting holes for hoisting would have been unsuitable, as the holes are located off-center, resulting in a large wire rope angle or direct interference with the upper frame's centerpiece components. Furthermore, using the upper frame's arm lifting lugs for hoisting would have been unsuitable, as the rated load of the lugs was far less than the overall hoisting load of the upper frame.

[0004] Obviously, the currently implemented upper frame overall lifting technology solution is mainly temporary, with many safety hazards and uncertainties. It is time-consuming and labor-intensive to use, and lacks systematic design and considerations of ease of use and safety. Summary of the Invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a device and method for integrally lifting the upper frame of the generator motor of a pumped storage power station, which solves the temporary, uncertain and difficult implementation of the existing upper frame integral lifting method and structure, and can safely and conveniently complete the installation of the generator motor upper frame and the overall disassembly / reinstallation of the upper frame during overhaul.

[0006] The technical solution adopted in the present invention is: A device for hoisting an upper frame of a pumped-storage power station generator motor as a whole comprises a balance beam system, wherein a plurality of connecting steel wire ropes are connected to the lower portion of the balance beam system, a plurality of special lifting holes are provided on the central body or the support arm of the upper frame, the connecting steel wire ropes are passed through the special lifting holes, a plurality of lifting steel wire ropes are connected to the upper portion of the balance beam system, and the plurality of lifting steel wire ropes are gathered and hung on a hook of a bridge crane.

[0007] The present invention features several dedicated lifting holes on the center body or arms of the upper frame, along with a design that connects wire ropes, a balance beam system, and the hoisting wire ropes. This eliminates the temporary, uncertain, and difficult nature of existing methods for hoisting the entire upper frame. It enables safe and convenient installation of the generator motor upper frame and removal / reinstallation of the entire upper frame during overhaul. By providing dedicated lifting holes at specific locations and a balance beam system, interference between wire ropes and excessive angles between them are avoided, ensuring safe and stable hoisting.

[0008] As a preferred embodiment of the present invention, a dedicated lifting hole is provided on the center body of the upper frame where the support arm is connected, which can further reduce the angle of the connecting wire rope. Preferably, the dedicated lifting hole and the connection hole on the balance beam system are located on the same vertical line.

[0009] As a preferred solution of the present invention, the connecting wire rope is arranged vertically after being connected to the dedicated lifting hole and the balance beam system.

[0010] As a preferred solution of the present invention, the number of the dedicated lifting holes is four, and the four dedicated lifting holes are arranged at 90° to each other on the circumference of the upper frame.

[0011] As a preferred embodiment of the present invention, the number of the connecting steel wire ropes and the number of the lifting steel wire ropes are both four, and the connecting steel wire ropes and the lifting steel wire ropes are respectively arranged at the same angle on the circumference with the dedicated lifting holes.

[0012] As a preferred embodiment of the present invention, the connecting wire rope includes a connecting wire rope body, the lower end of which is provided with a dedicated lifting hole, and the upper end of which is provided with a first connecting shackle. The other end of the first connecting shackle is connected to a connecting turnbuckle, the other end of which is connected to a second connecting shackle, and the other end of the second connecting shackle is connected to the balance beam system. The connecting turnbuckle can adjust the length of the connecting wire rope to maintain the upper frame level.

[0013] As a preferred embodiment of the present invention, the balance beam system comprises two mutually perpendicular balance beams, the middle portions of the two balance beams being fixed together, and the ends of the balance beams being connected to a connecting wire rope and a lifting wire rope, respectively. The ends of the balance beams are capable of extending beyond the central body, so that the dedicated lifting holes and the connection holes at the ends of the balance beams are aligned vertically, ensuring that the connecting wire ropes remain vertical after connection.

[0014] As a preferred embodiment of the present invention, the hoisting wire rope includes a first hoisting shackle connected to the balance beam system. The other end of the first hoisting shackle is connected to a hoisting turnbuckle. The other end of the hoisting turnbuckle is connected to a second hoisting shackle. The other end of the second hoisting shackle is connected to a main hoisting wire rope. The other end of the main hoisting wire rope is hung on a hook of the bridge crane. The hoisting turnbuckle can adjust the length of the hoisting wire rope to maintain the upper frame level.

[0015] A method for integrally hoisting an upper frame of a generator motor of a pumped storage power station comprises the following steps: S1: Connect the connecting wire rope and the lifting wire rope on the balance beam system, pass the connecting wire rope through the dedicated lifting hole on the upper frame, and gather the lifting wire ropes and hang them on the hook of the bridge crane; S2: After the overall lifting device of the upper frame is installed, try to lift the upper frame; S3: During the unit assembly process, after the lower frame is installed, the rotor is hoisted, and the air cooler is installed, the upper frame is officially hoisted; S4: After the upper frame is hoisted into the unit pit as a whole and the center, elevation and level of the upper frame are basically adjusted to the right position, the upper frame hoisting device is removed; S5: During the overhaul of the generator motor in the pumped storage power station, the overall reinstallation process of the upper frame is the same as the overall hoisting process during the installation of the upper frame, while the overall disassembly of the upper frame is the reverse process of the overall hoisting process during the installation of the upper frame.

[0016] As a preferred embodiment of the present invention, step S2 is specifically as follows: first, the upper frame is lifted about 10 mm and then stopped, and the connection between the bridge crane, the balance beam system and the lifting wire rope of the upper frame is checked to be reliable, and the lifting is continued after ensuring that it is correct; the lifting is stopped after the height is lifted to about 200 mm, and the lifting is repeatedly lifted and lowered three times between 10 mm and 200 mm to further confirm whether the connection of the lifting device is firm and whether the state of the lifting equipment is good; simultaneously, a level is set up to check the overall lifting level of the upper frame, and the lifting level of the upper frame is adjusted by adjusting the basket bolts of each lifting wire rope and each connecting wire rope.

[0017] The beneficial effects of the present invention are: The present invention features several dedicated lifting holes on the center body or arms of the upper frame, along with a design that connects wire ropes, a balance beam system, and the hoisting wire ropes. This eliminates the temporary, uncertain, and difficult nature of existing methods for hoisting the entire upper frame. It enables safe and convenient installation of the generator motor upper frame and removal / reinstallation of the entire upper frame during overhaul. By providing dedicated lifting holes at specific locations and a balance beam system, interference between wire ropes and excessive angles between them are avoided, ensuring safe and stable hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a diagram of the present invention in use during hoisting; Figure 3 This is a diagram showing the present invention in use when hoisting with the support arm removed; Figure 4 It is a schematic diagram of the overall hoisting of the upper frame of the generator motor of the existing pumped storage power station.

[0019] In the figure: 1-Balance beam system; 2-Connecting wire rope; 3-Lifting wire rope; 4-Center body; 5-Supporting arm; 6-Special lifting hole; 11-Balance beam; 12-Reinforcement rib; 21-Connecting wire rope body; 22-First connecting shackle; 23-Connecting basket bolt; 24-Second connecting shackle; 31-First lifting shackle; 32-Lifting basket bolt; 33-Second lifting shackle; 34-Lifting wire rope body. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0022] like Figures 1 to 3 As shown, the overall lifting device of the upper frame of the generator motor of the pumped storage power station of this embodiment includes a balance beam system 1, a plurality of connecting steel wire ropes 2 are connected to the lower part of the balance beam system 1, a plurality of special lifting holes 6 are provided on the central body 4 or the support arm 5 of the upper frame, the connecting steel wire ropes 2 are passed through the special lifting holes 6, and a plurality of lifting steel wire ropes 3 are connected to the upper part of the balance beam system 1. The plurality of lifting steel wire ropes 3 are gathered and hung on the hook of the bridge crane.

[0023] The present invention provides several dedicated lifting holes 6 on the central body 4 or support arms 5 of the upper frame, and is designed to connect the wire ropes 2, balance beam system 1, and lifting wire ropes 3. This solves the temporary, uncertain, and difficult implementation of existing methods for hoisting the entire upper frame. It allows for safe and convenient installation of the generator motor upper frame and removal / reinstallation of the entire upper frame during overhaul. By providing dedicated lifting holes 6 at specific locations and installing the balance beam system 1, interference between the wire ropes and excessive angles between the wire ropes are avoided, ensuring safe and stable hoisting.

[0024] Preferably, dedicated lifting holes 6 are located on the upper frame's central body 4 at the location where the support arms 5 are connected, further reducing the angle of the connecting wire rope 2. Dedicated lifting holes 6 and the connecting holes on the balance beam system 1 are located on the same vertical line. After the connecting wire rope 2 is connected to the dedicated lifting holes 6 and the balance beam system 1, it is arranged vertically.

[0025] There are four dedicated lifting holes 6, which are arranged at 90 degrees to each other on the circumference of the upper frame. There are four connecting wire ropes 2 and four lifting wire ropes 3, which are arranged at the same angle to the dedicated lifting holes 6 on the circumference.

[0026] Specifically, the connecting wire rope 2 includes a connecting wire rope body 21, the lower end of which is provided with a dedicated lifting hole 6, and the upper end of the connecting wire rope body 21 is provided with a first connecting shackle 22. The other end of the first connecting shackle 22 is connected to a connecting turnbuckle 23, and the other end of the connecting turnbuckle 23 is connected to a second connecting shackle 24. The other end of the second connecting shackle 24 is connected to the balance beam system 1. The connecting turnbuckle 23 can adjust the length of the connecting wire rope 2 to keep the upper frame level.

[0027] The balance beam system 1 comprises two mutually perpendicular balance beams 11, the middle portions of the two balance beams 11 being fixed together. The ends of the balance beams 11 are connected to the connecting wire rope 2 and the lifting wire rope 3, respectively. Reinforcement ribs 12 are connected between adjacent balance beams 11. The ends of the balance beams 11 can extend beyond the central body 4, allowing the dedicated lifting holes 6 to be aligned with the connection holes at the ends of the balance beams 11, ensuring that the connecting wire rope 2 remains vertical after connection.

[0028] The hoisting wire rope 3 includes a first hoisting shackle 31, which is connected to the balance beam system 1. The other end of the first hoisting shackle 31 is connected to a hoisting turnbuckle 32. The other end of the hoisting turnbuckle 32 is connected to a second hoisting shackle 33. The other end of the second hoisting shackle 33 is connected to a hoisting wire rope body 34. The other end of the hoisting wire rope body 34 is hung on the hook of the bridge crane. The hoisting turnbuckle 32 can adjust the length of the hoisting wire rope 3 to keep the upper frame level.

[0029] The method for integrally hoisting the upper frame of the generator motor of a pumped storage power station of this embodiment includes the following steps: 1. During the design phase of the generator motor upper frame, in combination with the design of the lifting lugs or lifting holes for the center body 4 and the support arm 5 of the upper frame, special lifting holes 6 are designed at four positions at 90 degrees to each other on the circumference of the center body 4 or the support arm 5 of the upper frame (see the attached Figure 2 It is recommended to design dedicated lifting holes 6 in the center body 4 of the upper frame, which connect the wire ropes 2 and the dedicated lifting holes 6 for the upper frame to be hoisted as a whole. Simultaneously, select four sets of wire ropes of the same specification based on the overall weight of the upper frame and the lifting angle after connecting the wire ropes 2 to the dedicated lifting holes 6. Design matching shackles and turnbuckles for adjustment of the wire ropes.

[0030] 2. Design a novel cross-shaped balance beam system (1) for integral upper frame hoisting based on the overall upper frame weight and the crane hook structure at the power station. Simultaneously, design a novel overall hoisting method and structural layout for the pumped-storage power station's generator motor upper frame, integrating dedicated lifting holes (6), hoisting wire ropes (3), connecting wire ropes (2), and balance beam system (1).

[0031] 3. During the in-factory manufacturing process of the upper frame support arm 5, the wire rope, the special lifting holes 6 for connecting the upper frame, and the new balance beam system 1 are simultaneously manufactured, and the wire rope is purchased from the manufacturer of the lifting wire rope 3.

[0032] 4. At the power plant's on-site installation station, assemble the upper frame, consisting of the center body 4 (suspended generator motor including thrust bearing) and support arms 5, using bolts, nuts, and pins. The support arms 5, each with dedicated lifting holes 6, are arranged at 90° angles to each other along the circumference of the frame.

[0033] 5. Connect the balance beam system 1 to the bridge crane, the wire rope 2, and the upper frame to the hoisting wire rope 3 according to the overall hoisting method and structural layout diagram for the new pumped-storage power station generator motor upper frame. Ensure that all connecting components are properly installed and securely connected.

[0034] 6. After the upper frame's integral hoisting fixture is installed, conduct a test hoist of the upper frame. First, raise the upper frame approximately 10mm and stop. Check the secure connection between the bridge crane, balance beam system 1, and the upper frame's hoisting wire ropes 3. Once this is confirmed, continue lifting. After the hoist reaches a height of approximately 200mm, stop. Repeat the process three times between 10mm and 200mm to further confirm the secure connection of the hoisting device and the proper condition of the lifting equipment. Simultaneously, set up a level to check the overall hoisting level of the upper frame. Adjust the upper frame's hoisting level by adjusting the turnbuckles attached to each wire rope to ensure that the overall hoisting level meets the requirements.

[0035] 7. During the final assembly of the unit, after the lower frame installation is completed, the rotor hoisting is completed, and the air cooler installation is completed, the upper frame is officially hoisted.

[0036] 8. After the upper frame is hoisted into the unit pit and the center, elevation, and level of the upper frame are basically adjusted to the correct position, remove the upper frame hoist.

[0037] 9. During the overhaul of the generator motor in a pumped storage power station, the overall reinstallation process of the upper frame is the same as the overall hoisting process during the installation of the upper frame. The overall removal of the upper frame is the reverse process of the overall hoisting process during the installation of the upper frame.

[0038] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A pumped storage power station generator motor upper frame integral hoisting device, characterized by: The invention comprises a balance beam system (1), wherein the lower part of the balance beam system (1) is connected to a plurality of connecting steel wire ropes (2), a central body (4) or a support arm (5) of an upper frame is provided with a plurality of special lifting holes (6), the connecting steel wire ropes (2) are passed through the special lifting holes (6), the upper part of the balance beam system (1) is connected to a plurality of lifting steel wire ropes (3), and the plurality of lifting steel wire ropes (3) are gathered and hung on a hook of a bridge crane.

2. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 1, characterized in that: A dedicated lifting hole (6) is provided on the center body (4) of the upper frame at a location where the support arm (5) is connected.

3. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 2, characterized in that: After the connecting wire rope (2) is connected to the dedicated lifting hole (6) and the balance beam system (1), it is arranged vertically.

4. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 1, characterized in that: The number of the special lifting holes (6) is four, and the four special lifting holes (6) are 90 degrees to each other on the circumference of the upper frame.

5. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 4, characterized in that: The number of the connecting steel wire ropes (2) and the number of the lifting steel wire ropes (3) are both four, and the connecting steel wire ropes (2) and the lifting steel wire ropes (3) are respectively arranged at the same angle on the circumference with the dedicated lifting hole (6).

6. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 1, characterized in that: The connecting wire rope (2) includes a connecting wire rope body (21), a special lifting hole (6) is provided at the lower end of the connecting wire rope body (21), a first connecting shackle (22) is provided at the upper end of the connecting wire rope body (21), the other end of the first connecting shackle (22) is connected to a connecting basket bolt (23), the other end of the connecting basket bolt (23) is connected to a second connecting shackle (24), and the other end of the second connecting shackle (24) is connected to the balance beam system (1).

7. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 1, characterized in that: The balance beam system (1) comprises two balance beams (11) perpendicular to each other, the middle parts of the two balance beams (11) are fixed together, and both ends of the balance beams (11) are respectively connected to a connecting wire rope (2) and a hoisting wire rope (3).

8. The integral hoisting device for the upper frame of the generator motor of a pumped storage power station according to claim 1, characterized in that: The hoisting wire rope (3) includes a first hoisting shackle (31), the first hoisting shackle (31) is connected to the balance beam system (1), the other end of the first hoisting shackle (31) is connected to a hoisting basket bolt (32), the other end of the hoisting basket bolt (32) is connected to a second hoisting shackle (33), the other end of the second hoisting shackle (33) is connected to a hoisting wire rope body (34), and the other end of the hoisting wire rope body (34) is hung on a hook of the bridge crane.

9. A method for integrally hoisting the upper frame of a generator motor of a pumped storage power station, using the integral hoisting device for the upper frame of a generator motor of a pumped storage power station according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Connect the connecting wire rope (2) and the lifting wire rope (3) on the balance beam system (1), pass the connecting wire rope (2) through the special lifting hole (6) of the upper frame, and gather the lifting wire rope (3) and hang them on the hook of the bridge crane; S2: After the overall lifting device of the upper frame is installed, try to lift the upper frame; S3: During the final assembly of the unit, after the lower frame is installed, the rotor is hoisted, and the air cooler is installed, the upper frame is officially hoisted; S4: After the upper frame is hoisted into the unit pit as a whole and the center, elevation and level of the upper frame are basically adjusted to the right position, the upper frame hoisting device is removed; S5: During the overhaul of the generator motor in the pumped storage power station, the overall reinstallation process of the upper frame is the same as the overall hoisting process during the installation of the upper frame, while the overall disassembly of the upper frame is the reverse process of the overall hoisting process during the installation of the upper frame.

10. The method for integrally hoisting the upper frame of a generator motor of a pumped storage power station according to claim 9, characterized in that: Step S2 is specifically as follows: first, the upper frame is lifted about 10 mm and then stopped, and the connection between the bridge crane, the balance beam system (1) and the hoisting wire rope (3) of the upper frame is checked to be reliable. After ensuring that there is no error, the lifting is continued; after the lifting height is about 200 mm, the lifting is stopped, and the lifting is repeatedly lifted and lowered three times between 10 mm and 200 mm to further confirm whether the connection of the lifting device is firm and whether the state of the lifting equipment is good; at the same time, a level is set up to check the overall lifting level of the upper frame, and the lifting level of the upper frame is adjusted by adjusting the basket bolts of each hoisting wire rope (3) and each connecting wire rope (2).

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