Double-dovetail magnetic pole hanging process method for pumped storage generator motor

Abstract

The invention discloses a pumped storage generator motor double-dovetail magnetic pole hanging process method, and belongs to the field of pumped storage generator motor rotor magnetic pole installation. According to the process method, a magnetic pole anti-deformation turnover tool and a single-lug magnetic pole lifting sling are provided, the problem that gaps disappear in the installation process due to the undesirable phenomenon that the magnetic pole obviously deforms in the lifting and erecting process of the magnetic pole is solved, and meanwhile the anti-jamming hanging process method is provided. The problems of installation progress stagnation, difficulty in magnetic pole dismounting and reworking and the like caused by frequent grinding damage and grinding deadness accidents of the magnetic pole are thoroughly solved. The device is suitable for narrow-gap hanging installation of ultra-long double-dovetail magnetic poles of all pumped storage generator motors, and has very high popularization and application values.

Description

Technical Field

[0001] This invention relates to a process for mounting double pigeon tail magnetic poles in a pumped-storage generator motor, belonging to the field of rotor magnetic pole installation in pumped-storage generator motors. Background Technology

[0002] The installation of ultra-long double dovetail magnetic poles with narrow gaps has always been a common challenge in the installation of pumped storage power generators. The gap between the 4000mm long magnetic poles and the dovetail grooves is only 1mm on each side. After removing the local high points of the magnetic yoke, when the magnetic pole is inserted into the magnetic yoke for more than 2000mm, the local installation gap will be drastically reduced to no more than 0.2mm due to the manufacturing standard of magnetic pole straightness not exceeding 0.8mm, making the installation extremely difficult. If the tool design is improper during the lifting and erection of the ultra-long giant magnetic pole, it will cause significant deformation of the magnetic pole, resulting in a magnetic pole straightness defect of 1.3mm-1.9mm. During the installation process, the gap will disappear, the friction between the magnetic pole and the magnetic yoke will increase sharply, causing jamming, magnetic pole damage and seizure accidents will occur frequently, often causing the installation progress to stop, making it difficult to remove and rework the magnetic pole, resulting in huge damage to the magnetic yoke and magnetic pole and poor installation quality.

[0003] Therefore, it is urgent to propose a process for mounting double pigeon tail magnetic poles on a pumped storage power generator to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of narrow gaps in the installation of ultra-long double-pigeon-tail magnetic poles. Due to significant deformation of the magnetic poles during lifting and erection, the gap disappears during installation, leading to frequent magnetic pole damage and failure, causing installation delays, and making magnetic pole removal and rework difficult. A brief overview of this invention is provided below to offer a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0005] The technical solution of this invention:

[0006] A method for mounting double pigeon tail magnetic poles in a pumped storage power generator includes the following steps: S1, adjusting the perpendicularity of the magnetic yoke, eliminating misalignment, and applying molybdenum disulfide lubricant to the pigeon tail groove.

[0007] S2. The straightness of the magnetic pole core is within 1mm, and it is polished.

[0008] S3. Use a special magnetic pole lifting tool and a special magnetic pole anti-deformation and turning tool to erect the magnetic pole;

[0009] S4. The magnetic pole is hoisted to the upper end of the magnetic yoke for magnetic pole mounting. The magnetic pole pigeon tail is guided into the magnetic yoke pigeon tail groove and lowered to the bottom of the magnetic yoke pigeon tail groove to complete the magnetic pole mounting.

[0010] Preferably, in S1, the magnetic yoke is composed of 10 yoke segments with a thickness of 400mm stacked together, with a total length of 4000mm. Twelve sets of dovetail grooves are evenly distributed on the outer edge to hang magnetic poles, and the gap between the dovetail grooves and the magnetic poles is 1mm on each side.

[0011] Preferably, adjusting the magnetic yoke in S1 includes the following steps:

[0012] S11. Adjust the overall perpendicularity and roundness of the magnetic yoke to no more than 0.40mm;

[0013] S12. Eliminate misaligned teeth in the pigeon tail groove between adjacent segments, polish and grind the joint to ensure a smooth transition;

[0014] S13. Apply molybdenum disulfide lubricant to the pigeon tail groove.

[0015] Preferably, the magnetic pole in S2 is composed of a magnetic pole core and a magnetic pole coil, with a total length of 4000mm.

[0016] Preferably, the straightness detection of the magnetic pole core in S2 includes the following steps:

[0017] S21. Use a 4000mm long straightedge to measure the straightness of the magnetic pole core. A straightness of no more than 1mm is considered acceptable.

[0018] S22. Grind and polish the magnetic pole core to remove surface high points and burrs.

[0019] Preferably, the special magnetic pole lifting device in S3 is a welded assembly structure, including a main lifting lug, an auxiliary lifting lug, a lifting plate, a positioning key, a transition pigeon tail pad, and a clamping bolt. The clamping bolt fastens the lifting plate to the upper end of the magnetic pole. The main lifting lug and the auxiliary lifting lug are welded on the lifting plate for lifting and leveling. The positioning key welded below it is inserted into the magnetic pole pigeon tail groove to transmit torque, and the transition pigeon tail pad is assembled on the positioning key to fill the fitting gap.

[0020] Preferably, the special magnetic pole anti-deformation turning tool in S3 is a welded assembly structure, including a support plate, a turning arc plate, a fixing plate, a strapping strap, and a clamping bolt. The support plate and the fixing plate are welded to the turning arc plate to form the main support frame. The main support frame is fixed to the magnetic pole core by the strapping strap and the clamping bolt.

[0021] Preferably, the process of raising the magnetic poles in step S3 involves the following steps:

[0022] S31. Install the special magnetic pole lifting tool at the upper end of the magnetic pole;

[0023] S32. Install a special magnetic pole anti-deformation and turning tool at the lower end of the magnetic pole;

[0024] S33. The bridge crane uses a wire rope to hang a special magnetic pole lifting device to raise the magnetic pole on the main lifting lug.

[0025] Preferably, the process of hoisting the magnetic poles to the upper end of the yoke in step S4 involves the following steps:

[0026] S41. The magnetic pole is suspended to the upper end of the magnetic yoke. The verticality of the magnetic pole core is adjusted to be no more than 1mm. A layer of molybdenum disulfide lubricant is applied to the magnetic pole core and the pigeon tail groove of the magnetic yoke.

[0027] S42. The magnetic pole is introduced into the dovetail groove of the magnetic yoke about 300mm. After adjusting the gap to be uniform, the magnetic pole is lowered steadily and slowly.

[0028] S43. The bridge crane operator monitors the entire descent process according to the initial weight of the magnetic pole. If the weight does not change, the magnetic pole will fall to the bottom of the magnetic yoke, and the magnetic pole installation will be completed.

[0029] The present invention has the following beneficial effects:

[0030] 1. This invention, by employing a special magnetic pole anti-deformation and turning tool and a single-ear lifting magnetic pole hoist, combined with an optimized hanging process, effectively prevents deformation of ultra-long magnetic poles during the lifting and erection process, ensuring the constant existence of narrow fitting gaps. This completely eliminates the accident of "scratching" or "jamming" of magnetic poles during hanging, significantly improving the success rate and efficiency of installation, and guaranteeing product quality and installation progress.

[0031] 2. This invention is applicable to the installation of ultra-long double dovetail magnets with extremely narrow gaps in all pumped storage power generation motors, and has high application value. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the mounting of the magnetic poles and yoke according to the present invention;

[0033] Figure 2 This is a schematic diagram of the magnetic pole lifting and turning / standing process described in this invention;

[0034] Figure 3 This is a schematic diagram of the assembly of the magnetic pole and the magnetic yoke according to the present invention;

[0035] Figure 4 This is a schematic diagram of the magnetic pole lifting device described in this invention;

[0036] Figure 5 This is a schematic diagram of the special magnetic pole anti-deformation turning tool described in this invention.

[0037] In the diagram: 1-Magnetic pole; 2-Magnetic yoke; 3-Magnetic pole lifting tool; 4-Special magnetic pole anti-deformation and turning tool; 5-Magnetic yoke section; 1-1-Magnetic pole core; 1-2-Magnetic pole coil; 3-1-Main lifting lug; 3-2-Secondary lifting lug; 3-3-Lifting plate; 3-4-Positioning key; 3-5-Transition pigeon tail pad; 3-6-Handling bolt; 4-1-Supporting bracket; 4-2 Turning arc plate; 4-3 Fixing plate; 4-4-Binding strap; 4-5-Handling bolt. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0039] Specific implementation method one: Combining Figures 1-5 This embodiment describes a method for mounting a double-pigeontail magnetic pole on a pumped-storage power generator. The method is implemented through the following steps:

[0040] S1. Adjust the perpendicularity of the magnetic yoke 2 to eliminate misalignment, and apply molybdenum disulfide lubricant to the pigeon tail groove.

[0041] S2, the straightness of the core of magnetic pole 1 is within 1mm, and it is polished.

[0042] S3. Use the special magnetic pole lifting tool 3 and the special magnetic pole anti-deformation and turning tool 4 to erect the magnetic pole;

[0043] S4. The magnetic pole is hoisted to the upper end of the magnetic yoke for magnetic pole mounting. The magnetic pole pigeon tail is guided into the magnetic yoke pigeon tail groove and lowered to the bottom of the magnetic yoke pigeon tail groove to complete the magnetic pole mounting.

[0044] The core of this implementation method lies in the fact that, through the specialized tools and refined steps defined in the subsequent implementation methods, the deformation problem of ultra-long magnetic poles during the lifting and erection process, as well as the resulting problem of narrow gap installation obstruction, are systematically solved.

[0045] Specific Implementation Method Two: Combining Figures 1-5 This embodiment further defines S1 as described in Specific Embodiment One. In this embodiment, the magnetic yoke 2 in S1 is composed of 10 stacked magnetic yoke segments 5, each 400mm thick, with a total length of 4000mm. Twelve sets of dovetail grooves are evenly distributed along the outer edge to hold the magnetic poles, with a 1mm gap on each side between the dovetail grooves and the magnetic poles. It is precisely this narrow 1mm gap on each side that makes controlling the straightness of the magnetic poles and the deformation during hoisting crucial to the success of the installation.

[0046] Specific implementation method three: Combining Figures 1-5 This embodiment further defines S1 as described in Specific Embodiment 1. In this embodiment, adjusting the magnetic yoke 2 in S1 includes the following steps:

[0047] S11. Adjust the overall perpendicularity and roundness of the magnetic yoke to no more than 0.40mm;

[0048] S12. Eliminate misalignment of the pigeon tail groove between adjacent sections, polish and grind the joint to ensure a smooth transition; S13. Apply molybdenum disulfide lubricant to the pigeon tail groove.

[0049] These meticulous pretreatment steps are designed to create a precise, smooth, and well-lubricated guide channel for the magnetic pole mounting, which is fundamental to ensuring the smooth introduction of the magnetic pole.

[0050] Specific implementation method four: Combination Figures 1-5 This embodiment further defines S2 as described in Specific Embodiment 1. In this embodiment, the magnetic pole 1 in S2 consists of a magnetic pole core 1-1 and a magnetic pole coil 1-2, with a total length of 4000mm. This excessively long structure is the main reason why the magnetic pole is prone to significant deformation due to its own weight during hoisting, leading to excessive straightness deviations.

[0051] Specific Implementation Method Five: Combining Figures 1-5 This embodiment further defines S2 as described in Specific Embodiment 1. In this embodiment, the straightness detection of the magnetic pole 1 core in S2 includes the following steps:

[0052] S21. Use a 4000mm straightedge to measure the straightness of the magnetic pole core 1-1. A straightness of no more than 1mm is considered acceptable. S22. Grind and polish the magnetic pole core 1-1 to remove high points and burrs from the surface.

[0053] In this embodiment, the key technology is that the straightness of the 4000mm long straightedge used for measurement must be 0.05mm. By measuring the side and plane of the magnetic pole core and using a feeler gauge, the maximum gap is ensured to be no more than 1mm, thus controlling the initial straightness of the magnetic pole from the source.

[0054] Specific Implementation Method Six: Combination Figures 1-5This embodiment further defines S3 as described in Specific Embodiment 1. In this embodiment, the special magnetic pole lifting device 3 in S3 is a welded assembly structure, consisting of a main lifting lug 3-1, an auxiliary lifting lug 3-2, a lifting plate 3-3, a positioning key 3-4, a transition pigeon tail pad 3-5, and a clamping bolt 3-6. The clamping bolt 3-6 fastens the lifting plate 3-3 to the upper end of the magnetic pole 1. The main lifting lug 3-1 and the auxiliary lifting lug 3-2 are welded onto the lifting plate 3-3 for lifting and leveling. The positioning key 3-4 welded below it is inserted into the magnetic pole pigeon tail groove to transmit torque, and the transition pigeon tail pad 3-5 is assembled on the positioning key 3-4 to fill the fitting gap.

[0055] In this embodiment, the key technology lies in the following: the lifting device secures the lifting plate 3-3 to the upper end of the magnetic pole using bolts 3-6. A positioning key 3-4 welded below it is inserted into the dovetail groove of the magnetic pole to transmit torque. A transition dovetail pad 3-5 is installed on the positioning key to fill the gap and ensure a stable connection. The core advantage is the use of a single main lifting lug 3-1 design, which allows for greater freedom of movement within the dovetail groove during magnetic pole installation. With the aid of lubricant, it can adaptively slide, minimizing the risk of jamming. The auxiliary lifting lug 3-2 is only used for fine-tuning and can be removed after insertion into the groove.

[0056] Specific implementation method seven: Combination Figures 1-5 This embodiment further defines S3 as described in Specific Embodiment 1. In this embodiment, the special magnetic pole anti-deformation turning tool 4 in S3 is a welded assembly structure, consisting of a support plate 4-1, a turning arc plate 4-2, a fixing plate 4-3, a binding strap 4-4, and a clamping bolt 4-5.

[0057] In this embodiment, the key technology lies in the following: the support plate 4-1 and the fixing plate 4-3 of the tool are welded to the turning arc plate 4-2, and reliably fixed to the magnetic pole core 1-1 by the binding strap 4-4 and the clamping bolt 4-5. Its innovation lies in the support plate's length reaching 1000mm, effectively shifting the fulcrum for erecting the magnetic pole from the lower end to this height. By changing the torque distribution, it effectively resists the bending deformation caused by the magnetic pole's own weight, ensuring that the straightness of the magnetic pole meets the requirements after being turned upright.

[0058] Specific implementation method eight: Combination Figures 1-5 This embodiment further defines S3 as described in Specific Embodiment 1. In this embodiment, the erection of the magnetic poles in S3 involves the following steps:

[0059] S31. Install the special magnetic pole lifting tool 3 at the upper end of the magnetic pole;

[0060] S32. Install the special magnetic pole anti-deformation and turning tool 4 at the lower end of the magnetic pole;

[0061] S33. The bridge crane uses a steel wire rope to hang a special magnetic pole lifting device to raise the magnetic poles on the main lifting lugs.

[0062] In this embodiment, the key technology lies in the fact that the main hook of the bridge crane is attached to only one sling on the main lifting lug 3-1, and the magnetic pole is smoothly turned from a horizontal to an vertical position by using the upward fulcrum provided by the anti-deformation turning tool 4 installed at the lower end. This process ensures that the magnetic pole core is not deformed due to the upward movement of the fulcrum, creating a prerequisite for subsequent narrow-gap installation.

[0063] Specific Implementation Method Nine: Combining Figures 1-5 This embodiment further defines S4 as described in Specific Embodiment 1. In this embodiment, the process of suspending the magnetic poles to the upper end of the yoke and mounting the magnetic poles in S4 includes the following steps:

[0064] S41. The magnetic pole is suspended to the upper end of the magnetic yoke. The verticality of the magnetic pole core is adjusted to be no more than 1mm. A layer of molybdenum disulfide lubricant is applied to the magnetic pole core and the pigeon tail groove of the magnetic yoke.

[0065] S42. The magnetic pole is introduced into the dovetail groove of the magnetic yoke about 300mm. After adjusting the gap to be uniform, the magnetic pole is lowered steadily and slowly.

[0066] S43. The bridge crane operator monitors the entire descent process according to the initial weight of the magnetic pole. If the weight does not change, the magnetic pole will fall to the bottom of the magnetic yoke, and the magnetic pole installation will be completed.

[0067] In this embodiment, the key technology lies in:

[0068] 1. After the magnetic pole is erected, the circumferential and axial perpendicularity should be checked with a plumb line. It is preferable to control it within 0.5mm. Fine adjustment can be assisted by the slings of the auxiliary lifting lug 3-2.

[0069] 2. After aligning the magnetic poles, apply a thin layer of molybdenum disulfide to the magnetic pole core and yoke groove, insert it about 300mm and confirm that the gap is uniform, then remove the auxiliary lifting lugs and let the main lifting lugs fall steadily.

[0070] 3. The descent speed needs to be controlled in stages: use the slow gear for the first 500mm after insertion, switch to the second gear after no abnormalities are observed, and switch back to the slow gear when the descent is halfway complete. The bridge crane operator must remember the initial weight and monitor the weight changes throughout the entire process. If the weight decreases, stop immediately and check.

[0071] 4. Monitor for any unusual noises throughout the process; stop immediately if any unusual noises are detected.

[0072] 5. When descending to the last three magnetic yoke sections, the risk is extremely high because the installation length exceeds 3000mm. The descent should be paused at each section to check and confirm that the gaps are normal before continuing to the bottom to complete the installation. This meticulous control is crucial to preventing the yoke from grinding and seizing the equipment.

[0073] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for mounting double-pigeon-tail magnetic poles on a pumped-storage power generator, characterized in that, Includes the following steps: S1. Adjust the perpendicularity of the magnetic yoke (2) to eliminate misalignment, and apply molybdenum disulfide lubricant to the pigeon tail groove. S2, Magnetic pole (1) The straightness of the iron core is within 1mm, and polishing is performed; S3. Use a special magnetic pole lifting tool (3) and a special magnetic pole anti-deformation and turning tool (4) to erect the magnetic pole; S4. The magnetic pole is hoisted to the upper end of the magnetic yoke for magnetic pole mounting. The magnetic pole pigeon tail is guided into the magnetic yoke pigeon tail groove and lowered to the bottom of the magnetic yoke pigeon tail groove to complete the magnetic pole mounting.

2. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The magnetic yoke (2) in S1 is composed of 10 magnetic yoke segments (5) with a thickness of 400mm stacked together. The total length of the magnetic yoke is 4000mm. 12 sets of pigeon tail grooves are evenly distributed on the outer edge to hang magnetic poles. The gap between the pigeon tail grooves and the magnetic poles is 1mm on one side.

3. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The adjustment of the magnetic yoke (2) in S1 includes the following steps: S11. Adjust the overall perpendicularity and roundness of the magnetic yoke to no more than 0.40mm; S12. Eliminate misaligned teeth in the pigeon tail groove between adjacent segments, polish and grind the joint to ensure a smooth transition; S13. Apply molybdenum disulfide lubricant to the pigeon tail groove.

4. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The magnetic pole (1) in S2 is composed of a magnetic pole core (1-1) and a magnetic pole coil (1-2), with a total length of 4000mm.

5. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The straightness detection of the core of the magnetic pole (1) in S2 is divided into the following steps: S21. Use a 4000mm long straightedge to measure the straightness of the magnetic pole core (1-1). A straightness of no more than 1mm is considered acceptable. S22. Grind and polish the magnetic pole core (1-1) to remove surface high points and burrs.

6. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The special magnetic pole lifting device (3) in S3 is a welded assembly structure, including a main lifting lug (3-1), an auxiliary lifting lug (3-2), a lifting plate (3-3), a positioning key (3-4), a transition pigeon tail pad (3-5), and a clamping bolt (3-6). The clamping bolt (3-6) fastens the lifting plate (3-3) to the upper end of the magnetic pole (1). The main lifting lug (3-1) and the auxiliary lifting lug (3-2) are welded on the lifting plate (3-3) for lifting and leveling. The positioning key (3-4) welded below it is inserted into the magnetic pole pigeon tail groove to transmit torque, and the transition pigeon tail pad (3-5) is assembled on the positioning key (3-4) to fill the fitting gap.

7. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The special magnetic pole anti-deformation turning tool (4) in S3 is a welded assembly structure, including a support plate (4-1), a turning arc plate (4-2), a fixing plate (4-3), a strapping strap (4-4), and a clamping bolt (4-5). The support plate (4-1) and the fixing plate (4-3) are welded to the turning arc plate (4-2) to form the main support frame. The main support frame is fixed to the magnetic pole core (1-1) by the strapping strap (4-4) and the clamping bolt (4-5).

8. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The process of raising the magnetic poles in S3 involves the following steps: S31. Install the special magnetic pole lifting tool (3) at the upper end of the magnetic pole; S32. Install the special magnetic pole anti-deformation turning tool (4) at the lower end of the magnetic pole; S33. The bridge crane uses a steel wire rope to hang a special magnetic pole lifting device (3) The main lifting lugs raise the magnetic pole.

9. The method for mounting double-pigeon-tail magnetic poles of a pumped-storage generator motor according to claim 1, characterized in that: The process of hoisting the magnetic poles to the upper end of the yoke in step S4 involves the following steps: S41. The magnetic pole is suspended to the upper end of the magnetic yoke. The verticality of the magnetic pole core is adjusted to be no more than 1mm. A layer of molybdenum disulfide lubricant is applied to the magnetic pole core and the pigeon tail groove of the magnetic yoke. S42. The magnetic pole is introduced into the dovetail groove of the magnetic yoke about 300mm. After adjusting the gap to be uniform, the magnetic pole is lowered steadily and slowly. S43. The bridge crane operator monitors the entire descent process according to the initial weight of the magnetic pole. If the weight does not change, the magnetic pole will fall to the bottom of the magnetic yoke, and the magnetic pole installation will be completed.

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