A rotor installation tool for permanent magnet submersible motor

Abstract

The utility model relates to the technical field of submersible motor assembly for wells, and discloses a rotor installation tool for a permanent magnet submersible motor, comprising a rotating shaft, a rotor body and an intracavity straightening body installed on the outer side of the rotating shaft, a stator body installed on the outer side of the rotor body, and a front end guide body installed on the left end of the stator body. The utility model can be axially connected in series between multiple unit rotor bodies through multiple intracavity straightening bodies, and the front end guide body and the rear end stop body can be threadedly connected to the two ends of the stator body through the first thread and the second thread. After that, the rotor body can be installed into the inner cavity of the stator body through the front end guide body, and the guide bell mouth can help ensure that the rotating shaft and the rotor body accurately enter the interior of the front end guide body. At the same time, the front end guide body can effectively guide the direction of the rotor body when it is just installed into the stator body, effectively avoiding the difficulty of entering the cavity caused by the rotor body being sucked to one side of the stator body.

Description

Technical Field

[0001] The utility model relates to the technical field of well submersible motor assembly, in particular to a rotor installation tool for a permanent magnet submersible motor. Background Art

[0002] Submersible motors for wells are limited by the application environment. Most of them are slender structures with segmented rotors. The length of high-power motors can reach 6-7 meters, and the number of rotor sections can reach more than ten. Permanent magnets are installed in the rotors of permanent magnet submersible motors for wells, which have their own magnetism. When assembling the rotor into the stator cavity, the rotor will be eccentrically attracted to one side of the stator core, resulting in great installation resistance and even friction damage or failure to install in place. Therefore, a rotor installation tool for permanent magnet submersible motors is required.

[0003] According to the search, Chinese patent literature, announcement number: CN213151859U, discloses a rotor magnet installation tool for a surface-mounted permanent magnet motor. The magnet is placed into the magnet guide hole of the magnet guide frame, and then the magnet propeller is fixed on the magnet guide frame. At this time, the magnet pressure plate is located on the magnet, and the propulsion screw is rotated. The propulsion screw drives the magnet pressure plate to slowly descend along the magnet guide frame, so that the magnet reaches the required installation position. After the glue is fixed, the magnet is installed, avoiding the problem of difficulty in positioning the magnet due to the repulsive force between the magnets during manual installation. However, in actual use, the device must adjust the position of the clamp and other parts every time the magnet is installed. However, bolt connections are used when installing the clamp and the magnet propeller and other parts. Therefore, while the device is stable, it is not easy to disassemble and assemble, which reduces the overall work efficiency. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a rotor installation tool for a permanent magnet submersible motor, which has the advantages of rapid installation, reduced defective rate, and guaranteed assembly quality, and solves the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotor installation tool for a permanent magnet submersible motor, comprising a rotating shaft, a rotor body and an intra-cavity straightening body are installed on the outer side surface of the rotating shaft, a stator body is installed on the outer side surface of the rotor body, a front end guide body is installed on the left end of the stator body, a rear end stop body is installed on the right end of the stator body, a dynamic ring and a static ring are installed inside the intra-cavity straightening body, a spring is clamped on the outer side surface of the static ring, and a spring is fixedly installed on the outer side surface of the static ring.

[0008] Preferably, the outer side surface of the front end guide body is provided with a first thread, and the front end guide body is threadedly connected to the left side surface of the stator body.

[0009] Through the above technical solution, the front end guide body can be screwed and connected to the left side surface of the stator body through the first thread, which provides convenience for its installation and subsequent disassembly and improves the overall assembly efficiency of the device.

[0010] Preferably, a guide bell mouth is provided on the left side surface of the front end guide body, and the diameter of the inner hole of the front end guide body is completely consistent with the diameter of the inner cavity of the stator body.

[0011] Through the above technical solution, the guide bell mouth can help ensure that the rotating shaft and the rotor body accurately enter the interior of the front guide body. At the same time, the front guide body can effectively guide the direction of the rotor body when it is just installed into the stator body, effectively avoiding the difficulty of entering the cavity caused by the rotor body being sucked onto one side of the stator body, thereby improving the accuracy and consistency of the overall assembly, reducing the defective rate, and ensuring the assembly quality.

[0012] Preferably, the outer side surface of the rear end stop body is provided with a second thread, the rear end stop body is threadedly connected to the right side surface of the stator body, and the right end surface of the rotating shaft is assembled on the left side surface of the rear end stop body.

[0013] Through the above technical solution, the rear end stop body can be screwed and connected to the right side surface of the stator body through the second thread, which provides convenience for its installation and subsequent disassembly; at the same time, the rear end stop body is used to guide the position of the assembly relationship between the rotor body and the stator body. When the right end of the rotating shaft reaches the designed installation position, it just hits the left end surface of the rear end stop body, and is installed in place at one time, avoiding the problem of difficulty in fine-tuning the installation size caused by the adsorption effect of the permanent magnet of the rotor body and the stator body.

[0014] Preferably, the rotor body, the intra-cavity stabilizing body, the moving ring, the stationary ring, the spring and the spring are all provided in plural numbers, and one end of the spring away from the stationary ring is fixedly connected to the inner side surface of the spring.

[0015] Through the above technical solution, multiple intracavity straightening bodies are axially connected in series between multiple unit rotor bodies, which are used to guide the direction of the rotor body penetrating into the inner cavity of the stator body, providing convenience for the rapid assembly between the rotor body and the stator body.

[0016] Preferably, the moving ring keyway is connected to the outer side surface of the rotating shaft, and the spring piece is engaged and connected to the inner side surface of the stator body.

[0017] Through the above technical solution, the moving ring is installed on the outer side of the rotating shaft using a flat key. The moving ring rotates with the rotating shaft and remains relatively still with the rotor body, and the spring is lifted up by the spring and embedded in the keyway of the inner cavity of the stator body, so that the stationary ring remains relatively still with the stator body. Therefore, the stationary ring can play an effective role in straightening the cavity, ensuring that the rotor body will not be sucked sideways to one side of the stator body, thereby improving the accuracy and consistency of the overall assembly.

[0018] Compared with the prior art, the utility model provides a rotor installation tool for a permanent magnet submersible motor, which has the following beneficial effects:

[0019] 1. The utility model can axially connect multiple unit rotor bodies in series through multiple intra-cavity straightening bodies, and can threadably connect the front end guide body and the rear end stop body to the two ends of the stator body through the first thread and the second thread. Then the rotor body can be installed into the inner cavity of the stator body through the front end guide body, and the guide bell mouth can help ensure that the rotating shaft and the rotor body accurately enter the interior of the front end guide body. At the same time, the front end guide body can effectively guide the direction of the rotor body when it is just installed into the stator body, effectively avoiding the difficulty of the rotor body being sucked sideways on one side of the stator body to enter the cavity; after the intra-cavity straightening body enters the inner cavity of the stator body, the dynamic ring rotates with the rotating shaft and remains relatively still with the rotor body, and the spring sheet is lifted up by the spring and embedded in the keyway of the inner cavity of the stator body, thereby making the static ring remain relatively still with the stator body. Therefore, the static ring can play an effective intra-cavity straightening role, ensuring that the rotor body will not be sucked sideways on one side of the stator body, effectively avoiding the side suction problem during propulsion and operation.

[0020] 2. The utility model uses the rear end stop body to guide the position of the assembly relationship between the rotor body and the stator body. When the right end of the rotating shaft reaches the designed installation position, it just contacts the left end surface of the rear end stop body, and is installed in place at one time, avoiding the problem of difficulty in fine-tuning the installation size caused by the adsorption effect between the permanent magnet of the rotor body and the stator body. Finally, when the installation is completed, the front end guide body and the rear end stop body can be disassembled by rotating them in the opposite direction, and the intra-cavity straightening body is left in the stator body cavity to continue to play a straightening role during operation, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional schematic diagram of the stator body and other parts of the utility model structure;

[0022] Figure 2 It is a front cross-sectional schematic diagram of the front end guide body of the structure of the utility model;

[0023] Figure 3 It is a front cross-sectional schematic diagram of the rear end stopper of the structure of the utility model;

[0024] Figure 4It is a front cross-sectional schematic diagram of the centralizing body and other parts in the structure cavity of the utility model;

[0025] Figure 5 It is a left side schematic diagram of the dynamic ring of the structure of the utility model.

[0026] Among them: 1. rotating shaft; 2. rotor body; 3. intracavity straightening body; 4. stator body; 5. front end guide body; 6. rear end stop body; 7. moving ring; 8. stationary ring; 9. spring; 10. spring; 11. first thread; 12. guide bell mouth; 13. second thread. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 A rotor installation tool for a permanent magnet submersible motor comprises a rotating shaft 1, a rotor body 2 and an intracavity centering body 3 are installed on the outer side of the rotating shaft 1, a stator body 4 is installed on the outer side of the rotor body 2, a front end guide body 5 is installed on the left end of the stator body 4, a rear end stop body 6 is installed on the right end of the stator body 4, a dynamic ring 7 and a static ring 8 are installed inside the intracavity centering body 3, a spring piece 9 is clamped on the outer side of the static ring 8, and a spring 10 is fixedly installed on the outer side of the static ring 8.

[0029] Specifically, the outer side surface of the front guide body 5 is provided with a first thread 11, and the front guide body 5 is threadedly connected to the left side surface of the stator body 4. The advantage is that the front guide body 5 can be screwed and connected to the left side surface of the stator body 4 through the first thread 11, which provides convenience for its installation and subsequent disassembly, and improves the overall assembly efficiency of the device.

[0030] Specifically, a guide bell mouth 12 is provided on the left side of the front guide body 5, and the inner diameter of the front guide body 5 is completely consistent with the inner diameter of the stator body 4. The advantage is that the guide bell mouth 12 of this structure can help ensure that the shaft 1 and the rotor body 2 accurately enter the interior of the front guide body 5, and the front guide body 5 can effectively guide the direction of the rotor body 2 when it is just installed in the stator body 4, effectively avoiding the difficulty of the rotor body 2 being sucked on the side of the stator body 4, thereby improving the accuracy and consistency of the overall assembly, reducing the defective rate, and ensuring the assembly quality.

[0031] Specifically, the outer side surface of the rear end stopper 6 is provided with a second thread 13, the rear end stopper 6 is threadedly connected to the right side surface of the stator body 4, and the right end surface of the rotating shaft 1 is assembled to the left side surface of the rear end stopper 6. The advantage is that the rear end stopper 6 can be screwed and connected to the right side surface of the stator body 4 through the second thread 13, which provides convenience for its installation and later disassembly; at the same time, the rear end stopper 6 is used for position guidance of the assembly relationship between the rotor body 2 and the stator body 4. When the right end of the rotating shaft 1 reaches the designed installation position, it just contacts the left end surface of the rear end stopper 6, and is installed in place at one time, avoiding the problem of difficulty in fine-tuning the installation size caused by the adsorption effect of the permanent magnet of the rotor body 2 and the stator body 4.

[0032] Specifically, the number of the rotor body 2, the intracavity centering body 3, the moving ring 7, the stationary ring 8, the spring 9 and the spring 10 are all provided in plurality, and one end of the spring 10 away from the stationary ring 8 is fixedly connected to the inner side of the spring 9. The advantage is that through this structure, the plurality of intracavity centering bodies 3 are axially connected in series between the plurality of unit rotor bodies 2, which is used for guiding the direction of the rotor body 2 penetrating into the inner cavity of the stator body 4, and provides convenience for the rapid assembly between the rotor body 2 and the stator body 4.

[0033] Specifically, the keyway of the moving ring 7 is connected to the outer side of the rotating shaft 1, and the spring piece 9 is engaged and connected to the inner side of the stator body 4. The advantage is that through this structure, the moving ring 7 is installed on the outer side of the rotating shaft 1 using a flat key, and the moving ring 7 rotates with the rotating shaft 1 and remains relatively still with the rotor body 2, and the spring piece 9 is lifted by the spring 10 and embedded in the keyway of the inner cavity of the stator body 4, so that the stationary ring 8 remains relatively still with the stator body 4, so that the stationary ring 8 can play an effective role in the cavity straightening, ensuring that the rotor body 2 will not be sucked to one side of the stator body 4, and improving the accuracy and consistency of the overall assembly.

[0034] When in use, multiple intracavity straightening bodies 3 can be axially connected in series between multiple unit rotor bodies 2, and the front end guide body 5 and the rear end stop body 6 can be threadedly connected to the two ends of the stator body 4 through the first thread 11 and the second thread 13. Then the rotor body 2 can be installed into the inner cavity of the stator body 4 through the front end guide body 5. The guide bell mouth 12 can help ensure that the shaft 1 and the rotor body 2 accurately enter the interior of the front end guide body 5. At the same time, the front end guide body 5 can effectively guide the direction of the rotor body 2 when it is just installed into the stator body 4, and effectively avoid the rotor body 2 being sucked on one side of the stator body 4 to cause difficulty in entering the cavity; after the intracavity straightening body 3 enters the inner cavity of the stator body 4, the moving ring 7 rotates with the shaft 1 and remains relatively still with the rotor body 2, and the spring piece 9 is After being lifted up, the spring 10 is embedded in the keyway of the inner cavity of the stator body 4, so that the static ring 8 remains relatively still with the stator body 4. Therefore, the static ring 8 can play an effective role in straightening the cavity, ensuring that the rotor body 2 will not be sucked to the side of the stator body 4, effectively avoiding the side suction problem during propulsion and operation; when the right end of the rotating shaft 1 reaches the designed installation position, it just hits the left end face of the rear end stop body 6, and is installed in place at one time, avoiding the problem of difficulty in fine-tuning the installation size caused by the adsorption effect between the permanent magnet of the rotor body 2 and the stator body 4; finally, when the installation is completed, the front end guide body 5 and the rear end stop body 6 can be disassembled by rotating them in the opposite direction, and the intra-cavity straightening body 3 is left in the cavity of the stator body 4 to continue to play a straightening role during operation, thereby improving the overall practicality of the device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotor installation tool for a permanent magnet submersible motor, comprising a rotating shaft (1), characterized in that: The outer side surface of the rotating shaft (1) is mounted with a rotor body (2) and an intracavity centering body (3); the outer side surface of the rotor body (2) is mounted with a stator body (4); the left end of the stator body (4) is mounted with a front end guide body (5); the right end of the stator body (4) is mounted with a rear end stop body (6); a moving ring (7) and a stationary ring (8) are mounted inside the intracavity centering body (3); a spring sheet (9) is clamped on the outer side surface of the stationary ring (8); and a spring (10) is fixedly mounted on the outer side surface of the stationary ring (8).

2. The rotor installation tool for a permanent magnet submersible motor according to claim 1, characterized in that: The outer side surface of the front end guide body (5) is provided with a first thread (11), and the front end guide body (5) is threadedly connected to the left side surface of the stator body (4).

3. The rotor installation tool for a permanent magnet submersible motor according to claim 1, characterized in that: A guide bell mouth (12) is provided on the left side of the front end guide body (5), and the inner hole diameter of the front end guide body (5) is completely consistent with the inner cavity diameter of the stator body (4).

4. The rotor installation tool for a permanent magnet submersible motor according to claim 1, characterized in that: The outer side surface of the rear end stop body (6) is provided with a second thread (13), the rear end stop body (6) is threadedly connected to the right side surface of the stator body (4), and the right end surface of the rotating shaft (1) is assembled on the left side surface of the rear end stop body (6).

5. The rotor installation tool for a permanent magnet submersible motor according to claim 1, characterized in that: The rotor body (2), the intracavity straightening body (3), the moving ring (7), the stationary ring (8), the spring sheet (9) and the spring (10) are all provided in plural numbers, and one end of the spring (10) away from the stationary ring (8) is fixedly connected to the inner side surface of the spring sheet (9).

6. The rotor installation tool for a permanent magnet submersible motor according to claim 1, characterized in that: The keyway of the moving ring (7) is connected to the outer side surface of the rotating shaft (1), and the spring sheet (9) is engaged and connected to the inner side surface of the stator body (4).

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