Overhauling tool for vertical bearing bush motor rotor with power of more than 2000kW and use method of overhauling tool

Abstract

The invention relates to the technical field of motor rotor maintenance, in particular to a maintenance tool for a vertical bearing bush motor rotor of 2000 kW or above and a use method. The positioning disc comprises a limiting hole and a fixing hole; the limiting hole is formed in the shaft neck of the rotor and is used for limiting the axial movement of the rotor; the ring key is arranged on the positioning disc and is matched with the rotor inner table; the fixing device comprises a screw rod, and the screw rod penetrates through the fixing hole in the positioning disc and is used for connecting the positioning disc with the ring key; and the limiting stoppers are mounted on the two sides of the positioning disc and are used for being matched with the rotor shaft neck. The device has the beneficial effects that the risks caused by unstable lifting operation and accidental bumping of equipment in the overhaul process or the overhaul process of multiple pieces of equipment can be effectively relieved, the overhaul time of a large-scale motor is shortened, and it is guaranteed that the overhaul work is conducted smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of motor rotor repair, in particular to a tool for repairing a vertical bearing motor rotor with a capacity of more than 2000 kW and a method for using the tool. Background Art

[0002] With the continuous improvement of industrial automation, large vertical motors are widely used in various industrial scenarios due to their high efficiency and stable working performance, such as mining, chemical, power and other industries. However, after long-term operation, these motors may suffer from wear and aging, resulting in performance degradation or even failure and shutdown, so regular maintenance and overhaul become particularly important.

[0003] In the maintenance process of large vertical motors, pulling out the rotor is a key operation, which involves pulling the rotor out of the stator for inspection or replacement of parts. Traditional methods usually use tools such as lifting rings, wire ropes, and clips to complete this process. Although these tools can basically meet the needs of pulling out the rotor, they expose a series of safety hazards and technical difficulties in actual application.

[0004] Firstly, due to the large size and heavy weight of large vertical motors, when ordinary lifting equipment is used for lifting, the contact surface and stress points are relatively small, which not only increases the difficulty of lifting, but also easily causes the rotor to shake, which may cause a collision between the rotor and the stator, damaging the coil or winding. Summary of the invention

[0005] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The invention aims to provide a tool for repairing rotors of vertical bearing motors with a power of more than 2000kW.

[0007] Therefore, its purpose is to solve the problem that when ordinary lifting equipment is used for lifting, the contact surface and the stress point are relatively small, which increases the difficulty of lifting.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: a rotor inspection tool for vertical bearing motors above 2000kW, comprising a rotor; a positioning plate, comprising a limit hole and a fixing hole; the limit hole is arranged on the rotor shaft neck, for limiting the axial movement of the rotor; a ring key is installed on the positioning plate, and cooperates with the rotor inner table; a fixing device, comprising a screw, the screw passes through the fixing hole on the positioning plate, and is used to connect the positioning plate with the ring key; a limiter, the limiter is installed on both sides of the positioning plate, and is used to cooperate with the rotor shaft neck.

[0009] As a preferred solution of the present invention, a rotor inspection tool for vertical bearing motors with a power of more than 2000kW, the ring key is fitted with the positioning disk, and a structure matching the rotor inner platform is provided inside the ring key.

[0010] As a preferred solution of the present invention for a rotor inspection tool for vertical bearing motors with a power of more than 2000 kW, the cooperation between the ring key and the inner platform of the rotor adopts an embedded structure.

[0011] As a preferred solution of the present invention for a rotor inspection tool for vertical bearing motors with a power of more than 2000kW, an elastic gasket is provided between the positioning plate and the ring key, and the elastic gasket is made of highly elastic rubber material or polyurethane material.

[0012] As a preferred solution of the present invention, a vertical bearing motor rotor inspection tool with a power of more than 2000kW is provided, wherein: an internal thread is provided inside the fixing hole to match the external thread on the screw, and an anti-loosening structure is designed at the end of the screw.

[0013] As a preferred solution of the present invention, a tool for repairing rotors of vertical bearing motors with a power of more than 2000 kW, the positioning plate, the ring key and the screw are all treated with surface coating.

[0014] As a preferred solution of the present invention, a tool for repairing rotors of vertical bearing motors with a power of more than 2000 kW, the limiter comprises a lifting point, and the connection between the lifting point and the rope adopts a quick-release hook.

[0015] As a preferred solution of the present invention, a tool for repairing rotors of vertical bearing motors with a capacity of more than 2000 kW, the lower half of the lifting point is in a linear arc shape.

[0016] As a preferred solution of the present invention, a vertical bearing motor rotor inspection tool with a power of more than 2000kW is provided with an anti-skid structure on the outside of the lifting point, and the anti-skid structure includes a surface treatment for increasing the friction coefficient or an embedded anti-skid pad.

[0017] As a preferred solution of the present invention, a tool for repairing rotors of vertical bearing motors with a power of more than 2000kW, wherein:

[0018] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for using a 2000kW or more vertical bearing motor rotor inspection tool, comprising a 2000kW or more vertical bearing motor rotor inspection tool, and,

[0019] Place the positioning plate on one end of the rotor, making sure that the fixing holes on the positioning plate are aligned with the preset marks on the rotor to preliminarily position the positioning plate;

[0020] The ring key installed on the positioning plate cooperates with the internal platform of the rotor to prevent the circumferential movement of the rotor during disassembly and assembly;

[0021] The screw passes through the fixing hole on the positioning plate and is connected to the ring key to achieve coaxial penetration locking;

[0022] The limiters installed on both sides of the positioning plate are used to improve the balance performance during lifting operations.

[0023] The beneficial effects of the present invention are as follows: the present invention can effectively alleviate the risks of unstable lifting operations and accidental damage to equipment during overhaul or maintenance of multiple equipment, shorten the maintenance time of large motors, and ensure the smooth progress of maintenance work. In addition, due to design problems, some equipment bodies do not have maintenance lifting points, and this device can also be used for maintenance, which not only facilitates maintenance, but also ensures that there will be no personal or equipment damage caused by the lifting device during the maintenance process. The inner diameter of this equipment has undergone fine turning, planing, milling, polishing and other processes, and will not damage the rotor shaft neck and thread during installation and use.

[0024] It can effectively alleviate the problem of some equipment bodies having no maintenance lifting points and avoid rotor displacement damage during overhaul or maintenance of multiple equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0027] Figure 2 It is a front view structural schematic diagram of the present invention.

[0028] Figure 3 It is a schematic diagram of the fitting structure of the positioning plate and the ring key in the present invention.

[0029] In the figure:

[0030] 100, positioning plate; 101, limiting hole; 102, fixing hole; 103, ring key; 104, screw; 105, limiter; 106, lifting point. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] Reference Figure 1-2 , is the first embodiment of the present invention, which provides a rotor inspection tool for vertical bearing motors with a capacity of more than 2000kW, a rotor; a positioning plate 100, including a limiting hole 101 and a fixing hole 102; the limiting hole 101 is arranged on the rotor shaft neck and is used to limit the axial movement of the rotor; a ring key 103 is installed on the positioning plate 100 and cooperates with the rotor inner table; a fixing device includes a screw 104, the screw 104 passes through the fixing hole 102 on the positioning plate 100, and is used to connect the positioning plate 100 with the ring key 103; a limiter 105, the limiter 105 is installed on both sides of the positioning plate 100 and is used to cooperate with the rotor shaft neck.

[0036] In this embodiment, the limiting hole 101 matches the corresponding hole on the rotor shaft neck to limit the axial movement of the rotor; and the fixing hole 102 is used to install a fixing device to ensure a firm connection between the positioning disk 100 and the rotor. The ring key 103 is installed on the positioning disk 100 and cooperates with the inner table of the rotor to effectively prevent the rotor from rotating during the maintenance process. The screw 104 passes through the fixing hole 102 on the positioning disk 100, and one end is connected to the ring key 103. When the positioning disk 100 needs to be fixed, the screw 104 only needs to be screwed into the appropriate position and then tightened with a wrench to achieve quick locking. The limiter 105 is installed on both sides of the positioning disk 100, mainly used to cooperate with the rotor shaft neck to further limit the movement of the rotor.

[0037] When in use, place the positioning plate 100 at one end of the rotor, and use the fixing hole 102 on the positioning plate 100 to align with the preset mark on the rotor to ensure that the positioning plate 100 is roughly in the correct position. The ring key 103 cooperates with the inner platform of the rotor, and after positioning, the fixing hole 102 fixes the screw 104 to lock the positioning plate 100 and cooperates with the ring key 103, so a coaxial penetration locking design is adopted to increase the contact area and shaft fixation. Ensure that the rotor always remains in a stable state during the entire maintenance process. The limiters 105 installed on both sides of the positioning plate 100 can improve the lifting balance.

[0038] Example 2

[0039] Reference Figure 1-2 , which is the second embodiment of the present invention, and this embodiment provides a rotor inspection tool for vertical bearing motors with a capacity of more than 2000kW, wherein the ring key 103 is fitted with the positioning disk 100, and a structure matching the rotor inner stage is provided inside the ring key 103. The cooperation between the ring key 103 and the rotor inner stage adopts an embedded structure. An elastic gasket is provided between the positioning disk 100 and the ring key 103, and the elastic gasket is made of a highly elastic rubber material or a polyurethane material. An internal thread is provided inside the fixing hole 102, which matches the external thread on the screw 104, and an anti-loosening structure, such as a spring washer or a locking nut, is designed at the end of the screw 104 to prevent loosening in harsh working environments such as vibration. The positioning disk 100, the ring key 103 and the screw 104 are all surface-plated.

[0040] In this embodiment, the ring key 103 is designed with an embedded structure that matches the inner platform of the rotor. This design can not only ensure a close fit between the two, but also effectively transmit torque to avoid unnecessary displacement of the rotor during maintenance. The positioning plate 100 is provided with a plurality of fixing holes 102 for installing screws 104 to achieve a stable fixation of the rotor. The contact surface between the positioning plate 100 and the ring key 103 is precisely processed to ensure that the two fit closely and reduce the possibility of vibration.

[0041] The elastic gasket is located between the positioning disk 100 and the ring key 103. Its main function is to play a buffering role when the rotor is subjected to external impact or vibration, and to protect the ring key 103 and the positioning disk 100 from damage. In addition, the elastic gasket can also adjust the gap between the ring key 103 and the positioning disk 100 to ensure good cooperation between the two under different working conditions. Considering the complexity of the working environment, the elastic gasket is made of highly elastic rubber material or polyurethane material. These two materials have good wear resistance and aging resistance, and can maintain excellent physical properties after long-term use. Each fixing hole 102 is processed with an internal thread inside to match the external thread on the screw 104. This threaded connection method is not only convenient for installation and disassembly, but also can withstand large tensile and shear forces to ensure the stability of the rotor during the maintenance process. The end of the screw 104 is designed with an anti-loosening structure, such as a spring washer or a locking nut, which can effectively prevent the screw 104 from loosening under harsh working environments such as vibration, and ensure the safety of the maintenance process.

[0042] Example 3

[0043] Reference Figure 1-3 , which is the third embodiment of the present invention, provides a 2000kW or more vertical bearing motor rotor inspection tool, the limiter 105, including a lifting point 106, the lifting point 106 and the rope are connected by a quick release hook. The lower half of the lifting point 106 is in a linear arc shape. The anti-skid structure includes a surface treatment or an embedded anti-skid pad that increases the friction coefficient.

[0044] In this embodiment, a spring automatic locking device is installed inside the quick release hook to ensure that it will not be accidentally released during the lifting process. At the same time, a manual unlocking button is provided on the outside to facilitate the operator to quickly unlock it when needed. The lower half of the lifting point 106 is designed to be a linear arc shape. Such a design can better disperse the lifting force and avoid deformation or damage caused by excessive local force.

[0045] Considering the stability of the rotor during the lifting process, the design of the anti-skid structure is also crucial. The anti-skid structure in this solution is mainly achieved in two ways: one is to perform special surface treatment on the contact surface, and the other is to install an embedded anti-skid pad.

[0046] Surface treatment: The lifting point 106 is subjected to sandblasting, phosphating and other treatments to increase the surface roughness and thus the friction coefficient.

[0047] Embedded anti-skid pad: An anti-skid pad made of high elastic rubber or other high friction material is embedded in the key position of the lifting point 106.

[0048] A method for using a rotor inspection tool for a vertical bearing motor with a capacity of more than 2000kW. The positioning plate 100 is aligned with the preset mark on the rotor through the fixing hole 102 thereon to determine the correct installation position. The ring key 103 installed on the positioning plate 100 is designed to fit tightly with the inner table of the rotor to facilitate subsequent operations, such as the removal or installation of components. The screw 104 passes through the fixing hole 102 on the positioning plate 100 to firmly connect the positioning plate 100 and the ring key 103 together. The limiters 105 installed on both sides of the positioning plate 100 serve as additional safety measures to adjust the balance of the lifting. Finally, after completing all the above steps, the lifting point 106 is used to fit tightly with the rope to achieve the movement, extraction, steering and final fixation of the entire assembly.

[0049] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0051] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A tool for inspecting and repairing rotors of vertical bearing motors with a capacity of 2000 kW or more, characterized in that: include, Rotor; The positioning plate (100) comprises a limiting hole (101) and a fixing hole (102); A limiting hole (101), arranged on the rotor journal, for limiting the axial movement of the rotor; A ring key (103) is installed on the positioning plate (100) and cooperates with the inner platform of the rotor; A fixing device, comprising a screw (104), wherein the screw (104) passes through a fixing hole (102) on the positioning plate (100) and is used to connect the positioning plate (100) to a ring key (103); A stopper (105) is installed on both sides of the positioning plate (100) and is used to cooperate with the rotor journal.

2. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 1, characterized in that: The ring key (103) is arranged in close contact with the positioning plate (100), and a structure matching the inner platform of the rotor is arranged inside the ring key (103).

3. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 2, characterized in that: The cooperation between the ring key (103) and the rotor inner platform adopts an embedded structure.

4. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 3, characterized in that: An elastic gasket is provided between the positioning plate (100) and the ring key (103), and the elastic gasket is made of a highly elastic rubber material or a polyurethane material.

5. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 4, characterized in that: An internal thread is provided inside the fixing hole (102) to match the external thread on the screw rod (104), and an anti-loosening structure is designed at the end of the screw rod (104).

6. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 5, characterized in that: The positioning plate (100), the ring key (103) and the screw rod (104) are all subjected to surface coating treatment.

7. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 1, characterized in that: The stopper (105) comprises a lifting point (106), and the lifting point (106) is connected to the rope by a quick release hook.

8. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 7, characterized in that: The lower part of the lifting point (106) is in a linear arc shape.

9. A 2000kW or more vertical bearing motor rotor inspection tool as claimed in claim 8, characterized in that: An anti-skid structure is arranged on the outside of the lifting point (106), and the anti-skid structure comprises a surface treatment for increasing the friction coefficient or an embedded anti-skid pad.

10. A method for using a tool for inspecting and repairing a rotor of a vertical bearing motor with a power of more than 2000kW, characterized in that: A tool for repairing rotors of vertical bearing motors with a power of more than 2000 kW as claimed in any one of claims 1 to 9, and Place the positioning plate on one end of the rotor, making sure that the fixing holes on the positioning plate are aligned with the preset marks on the rotor to preliminarily position the positioning plate; The ring key installed on the positioning plate cooperates with the internal platform of the rotor to prevent the circumferential movement of the rotor during disassembly and assembly; The screw passes through the fixing hole on the positioning plate and is connected to the ring key to achieve coaxial penetration locking; The limiters installed on both sides of the positioning plate are used to improve the balance performance during lifting operations.

Images