A large-tonnage flywheel mounting method and application

Abstract

The application discloses a large-tonnage flywheel mounting method and application and belongs to the technical field of water pumps, and solves the problem that the existing mounting mode cannot be adapted to the flywheel with an upper large part and a lower small part. The large-tonnage flywheel mounting method comprises the following steps: S1, placing the flywheel on a first jacking mechanism, and jacking the flywheel by the first jacking mechanism; S2, assembling the flywheel after jacking in S1 with a motor shaft through a fastening mechanism; S3, arranging a connecting mechanism and a second jacking mechanism on the end face of the motor shaft, and connecting the end face of the motor shaft with the second jacking mechanism through the connecting mechanism; and S4, repeating S3 until the flywheel reaches a preset detection value, then fastening the fastening mechanism according to the preset value, and completing the mounting of the flywheel. The application realizes the upward vertical mounting of the large-tonnage flywheel from the lower part, adapts to the hard working condition requirement that the vertical water pump is not allowed to be installed upside down and the flywheel has an upper large part and a lower small part, and solves the industry problem that the large-tonnage flywheel cannot be accurately assembled under the scene.

Description

Technical Field

[0001] This invention belongs to the field of water pump technology, specifically relating to a method for installing a large-tonnage flywheel and its application. Background Technology

[0002] Currently, large vertical water pumps have a strict requirement that they cannot be installed upside down, while the large-tonnage disc-shaped flywheel that needs to be installed on the motor side has a special structure that is larger at the top and smaller at the bottom. Conventional installation methods such as "seat-down" and "horizontal assembly" cannot be adapted to this working condition. Summary of the Invention

[0003] In view of the above problems, the purpose of this invention is to provide a method and application for installing large-tonnage flywheels, which solves the problem that existing installation methods cannot be adapted to flywheels with a large upper and small lower structure.

[0004] The problem lies in the special structure of large-tonnage disc-shaped flywheels, which are wider at the top and narrower at the bottom.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A method for installing a large-tonnage flywheel includes the following steps: S1. Place the flywheel on the first lifting mechanism, and the first lifting mechanism lifts the flywheel. S2. Assemble the flywheel, which has been lifted in S1, to the motor shaft using a fastening mechanism; hoist the motor as a whole so that the fastening mechanism is aligned with the motor shaft, and adjust the flywheel to a preset position using the first lifting mechanism; S3. A connecting mechanism and a second lifting mechanism are provided on the end face of the motor shaft. The end face of the motor shaft is connected to the second lifting mechanism through the connecting mechanism. The second lifting mechanism lifts the flywheel to meet the turning requirements. A turning mechanism is provided on the upper part of the motor. A measuring mechanism is provided on the lower part of the motor. The measuring mechanism detects the flywheel. S4. Repeat S3 until the flywheel reaches the preset detection value, then tighten the fastening mechanism according to the preset value to complete the installation of the flywheel.

[0006] In some embodiments, the first lifting mechanism in S1 includes a drive unit, a lifting unit, and a positioning and rotating unit. The drive unit is connected to the lifting unit and the positioning and rotating unit respectively. The flywheel is placed on the positioning and rotating unit. The lifting unit is connected to the positioning and rotating unit and lifts the positioning and rotating unit. The flywheel of the positioning and rotating unit is positioned and rotated.

[0007] In some embodiments, in step S2, the flywheel that has been lifted in step S1 is assembled to the motor shaft via a fastening mechanism, such that the gap between the fastening mechanism and the motor shaft is 0.10mm-0.20mm.

[0008] In some embodiments, during step S2, while the fastening mechanism is being tightened, the circumferential clearance of the motor shaft is checked, and the circumferential position of the flywheel is adjusted in real time.

[0009] In some embodiments, the measuring mechanism is a dial indicator. The dial indicator is installed at the lower part of the motor and the turning mechanism is used to perform turning detection and record the runout value of the lower end face of the flywheel.

[0010] In some embodiments, S3 further includes plotting and analyzing the data of the runout value, determining the current assembly accuracy error of the flywheel based on the plot, defining the maximum positive value in the data as a high point and the maximum negative value as a low point, marking them on the flywheel, and adjusting the flywheel through the measuring mechanism.

[0011] In some embodiments, the measuring mechanism adjusts the flywheel by adjusting the height of the flywheel through the second lifting mechanism, observing the values ​​of the measuring mechanism, stopping the lifting when the values ​​of the high point and the low point are close, and fastening the motor shaft through the fastening mechanism, while observing the values ​​of the measuring mechanism.

[0012] In some embodiments, if the fluctuation value of the measuring mechanism in S4 is >0.1mm, it is adjusted again by the second lifting mechanism; if the fluctuation value of the measuring mechanism is ≤0.1mm, the motor shaft is tightened by the fastening mechanism according to a preset value.

[0013] In some embodiments, the number of dial indicators is at least four, each dial indicator is evenly distributed along the circumference, and the needle of each dial indicator is in contact with the lower surface of the flywheel.

[0014] Another technical solution of the present invention is as follows: the application of the large-tonnage flywheel installation method described above in a vertical water pump.

[0015] Compared with existing technologies, this invention, through the first lifting mechanism, fastening structure, connecting mechanism and second lifting mechanism, not only solves the core problem that traditional installation methods cannot adapt to this special working condition, but also achieves multiple technical improvements in terms of installation adaptability, assembly accuracy, operation controllability and equipment operation reliability, while taking into account both installation efficiency and structural safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of a method for installing a large-tonnage flywheel according to Embodiment 1 of the present invention; It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0023] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] Example 1 A method for installing a large-tonnage flywheel, such as Figure 1 As shown, it includes the following steps: S1. Place the flywheel on the first lifting mechanism, and the first lifting mechanism lifts the flywheel. The first lifting mechanism in S1 includes a drive unit, a lifting unit, and a positioning and rotating unit. The drive unit is connected to the lifting unit and the positioning and rotating unit respectively. The flywheel is placed on the positioning and rotating unit. The lifting unit is connected to the positioning and rotating unit and lifts the positioning and rotating unit. The flywheel of the positioning and rotating unit is positioned and rotated. Furthermore, the lower end of the lifting unit contacts the ground and is lifted using the drive unit. The drive unit includes a motor assembly and a speed change assembly. The motor assembly is connected to the speed change assembly, and the speed change assembly adjusts the speed of the output end of the motor assembly. The lifting unit includes a lifting assembly and a base assembly connected to the lifting assembly. The base assembly is equipped with a motor assembly. The lifting assembly is connected to the positioning and rotating unit and controls the lifting and lowering of the positioning and rotating unit. Furthermore, the lifting unit includes four lead screws, which are connected to a transmission assembly. The rotation of the transmission assembly drives the four lead screws to move up and down. The upper part of the four lead screws is connected to a positioning and rotating unit, which includes a positioning assembly, an adjusting assembly, and a tray assembly. The positioning assembly is connected to the tray assembly through the adjusting assembly, which is a universal joint that allows the tray assembly to rotate 360° in the horizontal circumferential direction. This invention achieves the vertical installation of a large-tonnage flywheel from the bottom up by using four lead screws simultaneously. It perfectly adapts to the strict working conditions that "vertical water pumps cannot be installed upside down and the flywheel has a structure that is larger at the top and smaller at the bottom," solving the industry problem of the inability to accurately assemble large-tonnage heavy discs in this scenario. Furthermore, the positioning assembly includes a positioning plate and an adjusting component. The adjusting component is located on the side of the positioning plate and is a set screw. Set screws are installed at 90° intervals on the lower axial position of the positioning plate, for a total of 4 set screws, which play a role in fine adjustment. The set screws and the horizontal circumferential adjustment can achieve precise adjustment in the circumferential and vertical directions during the flywheel installation process. The vertical stroke of the flywheel is 500mm-1000mm, and it can rotate 360° during the flywheel installation process. It can achieve precise adjustment of the flywheel in 4 points in the vertical circumference during the flywheel installation process. S2. Assemble the flywheel, which has been lifted in S1, to the motor shaft using a fastening mechanism; hoist the motor as a whole so that the fastening mechanism is aligned with the motor shaft, and adjust the flywheel to a preset position using the first lifting mechanism; The flywheel, after being lifted in S1, is assembled to the motor shaft via a fastening mechanism, ensuring a gap of 0.10mm-0.20mm between the fastening mechanism and the motor shaft. An anti-drop plate is installed on the flywheel to prevent the fastening mechanism from falling off. The universal connecting tray assembly allows for 360° rotation and 4-point circumferential fine-tuning with set screws. Combined with a 0.10mm-0.20mm pre-reserved gap in the bore before the tapered sleeve tightens, the difficulty of aligning the flywheel and the motor shaft is greatly reduced, avoiding assembly failures caused by component jamming or misalignment during the upward lifting process. This achieves precise lifting and positioning of large-tonnage flywheels with a vertical stroke of 500mm-1000mm. Furthermore, at least two support mechanisms are placed around the first lifting mechanism, and their placement meets the support requirements of the lower flange surface of the motor assembly. The positions of the support mechanisms are measured and adjusted to ensure that the distance between the support mechanisms and the flywheel circumferential direction is basically consistent. The fastening mechanism uses an expansion sleeve to hoist the installed motor as a whole, roughly aligning the motor shaft with the inner hole of the expansion sleeve for preliminary installation. Furthermore, the first lifting mechanism lifts the flywheel, precisely adjusting its circumferential direction using adjusting components during the lifting process. The flywheel is then precisely aligned with the motor shaft via a tightening sleeve. The flywheel is lifted from the bottom to its designed installation position. Simultaneously with the tightening mechanism, the circumferential clearance of the motor shaft is checked, and the circumferential position of the flywheel is adjusted in real time. Multiple symmetrical and uniform tightening operations are performed with a torque of 50-100 Nm each time until the tightening force meets the flywheel's weight requirements, ensuring no axial displacement of the flywheel. The tightening sleeve achieves a gapless interference-fit rigid connection between the flywheel and the motor shaft through elastic deformation. This effectively transmits the circumferential torque between the motor shaft and the flywheel, ensuring the design requirements for the pump set's coasting time. It also eliminates assembly gaps between components, preventing radial / axial movement and vibration of the flywheel during equipment operation, reducing hard friction and wear on the tightening sleeve and motor shaft, and extending the overall service life of the equipment. S3. A connecting mechanism and a second lifting mechanism are provided on the end face of the motor shaft. The end face of the motor shaft is connected to the second lifting mechanism through the connecting mechanism. The second lifting mechanism lifts the flywheel to meet the turning requirements. A turning mechanism is provided on the upper part of the motor. A measuring mechanism is provided on the lower part of the motor. The measuring mechanism detects the flywheel. In S3, the measuring mechanism is a dial indicator. The dial indicator is installed at the lower part of the motor and the turning mechanism is used to perform turning detection and record the runout value of the lower end face of the flywheel. More specifically, the number of dial indicators is at least four, each dial indicator is evenly distributed along the circumference, and the needle of each dial indicator is in contact with the lower surface of the flywheel; More specifically, S3 further includes plotting and analyzing the data of the runout value, determining the current assembly accuracy error of the flywheel based on the plot, defining the maximum positive value in the data as the high point and the maximum negative value as the low point, marking them on the flywheel, and adjusting the flywheel through the measuring mechanism; The measuring mechanism adjusts the flywheel by adjusting its height using the second lifting mechanism and observing the values ​​measured by the measuring mechanism. When the values ​​at the high point and the low point are close, the lifting stops, and the motor shaft is tightened using the fastening mechanism. The values ​​measured by the measuring mechanism are then observed. S4. Repeat S3 until the flywheel reaches the preset detection value, then tighten the fastening mechanism according to the preset value to complete the installation of the flywheel. If the fluctuation value of the measuring mechanism is >0.1mm, it is readjusted by the second lifting mechanism; if the fluctuation value of the measuring mechanism is ≤0.1mm, the motor shaft is tightened by the fastening mechanism according to a preset value. This method improves assembly accuracy, prevents repeated adjustments, and ensures the stability of assembly accuracy.

[0026] Example 2 Application of the large-tonnage flywheel installation method described in Example 1 in a vertical water pump.

[0027] In summary, the high-precision assembly of the flywheel using the installation method of this invention effectively reduces vibration and noise during equipment operation, improves the stability of pump unit operation, avoids damage to related components caused by excessive end-face runout, and reduces subsequent equipment maintenance costs. The installation method of this invention makes precision adjustment easier to control, significantly reducing the technical requirements for operators when installing large-tonnage heavy components.

[0028] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0029] It should be noted that the steps described above are merely illustrative and do not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of them to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here. The steps of the method described in this application are not limited to being executed sequentially according to the order in the specification; without changing the core technical solution, the execution order of some steps can be adjusted, or they can be implemented in parallel, or steps can be omitted or added in different scenarios. The above modifications or equivalent substitutions do not affect the substantive content of the technical solution of this application and should all fall within the scope of protection of this application.

[0030] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. The scope of protection of this application should be determined by the scope of the claims. Although this application has disclosed the preferred embodiment above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the scope of the technical solution of this application.

Claims

1. A method for installing a large-tonnage flywheel, characterized in that, Includes the following steps: S1. Place the flywheel on the first lifting mechanism, and the first lifting mechanism lifts the flywheel. S2. Assemble the flywheel, which has been lifted in S1, to the motor shaft using a fastening mechanism; hoist the motor as a whole so that the fastening mechanism is aligned with the motor shaft, and adjust the flywheel to a preset position using the first lifting mechanism; S3. A connecting mechanism and a second lifting mechanism are provided on the end face of the motor shaft. The end face of the motor shaft is connected to the second lifting mechanism through the connecting mechanism. The second lifting mechanism lifts the flywheel to meet the turning requirements. A turning mechanism is provided on the upper part of the motor. A measuring mechanism is provided on the lower part of the motor. The measuring mechanism detects the flywheel. S4. Repeat S3 until the flywheel reaches the preset detection value, then tighten the fastening mechanism according to the preset value to complete the installation of the flywheel.

2. The method for installing a large-tonnage flywheel according to claim 1, characterized in that, The first lifting mechanism in S1 includes a drive unit, a lifting unit, and a positioning and rotating unit. The drive unit is connected to the lifting unit and the positioning and rotating unit respectively. The flywheel is placed on the positioning and rotating unit. The lifting unit is connected to the positioning and rotating unit and lifts the positioning and rotating unit. The flywheel of the positioning and rotating unit is positioned and rotated.

3. The method for installing a large-tonnage flywheel according to claim 1 or 2, characterized in that, In step S2, the flywheel, which has been lifted in step S1, is assembled to the motor shaft via a fastening mechanism, such that the gap between the fastening mechanism and the motor shaft is 0.10mm-0.20mm.

4. The method for installing a large-tonnage flywheel according to claim 3, characterized in that, In step S2, while the fastening mechanism is being tightened, the circumferential clearance of the motor shaft is checked, and the circumferential position of the flywheel is adjusted in real time.

5. The method for installing a large-tonnage flywheel according to claim 4, characterized in that, In step S3, the measuring mechanism is a dial indicator. A dial indicator is installed at the lower part of the motor and the turning mechanism is used to perform turning detection and record the runout value of the lower end face of the flywheel.

6. The method for installing a large-tonnage flywheel according to claim 5, characterized in that, S3 further includes plotting and analyzing the data of the runout value, determining the current assembly accuracy error of the flywheel based on the plot, defining the maximum positive value in the data as the high point and the maximum negative value as the low point, marking them on the flywheel, and adjusting the flywheel through the measuring mechanism.

7. The method for installing a large-tonnage flywheel according to claim 5, characterized in that, The measuring mechanism adjusts the flywheel by adjusting its height using the second lifting mechanism and observing the values ​​measured by the measuring mechanism. When the values ​​at the high point and the low point are close, the lifting stops, and the motor shaft is tightened using the fastening mechanism. The values ​​measured by the measuring mechanism are then observed.

8. The method for installing a large-tonnage flywheel according to claim 7, characterized in that, If the fluctuation value of the measuring mechanism in S4 is >0.1mm, it will be adjusted again by the second lifting mechanism. If the fluctuation value of the measuring mechanism is ≤0.1mm, the motor shaft will be tightened by the fastening mechanism according to the preset value.

9. The method for installing a large-tonnage flywheel according to claim 5, characterized in that, The number of dial indicators is at least four, and each dial indicator is evenly distributed along the circumference, with the pointer of each dial indicator in contact with the lower surface of the flywheel.

10. The method for installing a large-tonnage flywheel as described in any one of claims 1-9, characterized in that, Application in vertical water pumps.

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