A method for assembling a vertical energy storage motor with permanent magnets

Abstract

The present invention relates to an assembly method of a vertical energy storage motor with a permanent magnet, which is installed vertically from bottom to top and from inside to outside; the rotor is installed first, and the stator is installed later; and there is no need to turn the motor over. During the installation process, the axial displacement of the rotor is limited by the interaction between the tension bolts and the support screws, avoiding the impact of the suction force on the rotor when installing the permanent magnet magnetic suspension assembly. The upper and lower bearings are installed after the rotor is in place, avoiding radial impact on the bearings, ensuring that the bearings will not be damaged during the installation process, reducing costs, and ensuring the success rate of assembly.

Description

Technical Field

[0001] The invention relates to the technical field of motor assembly, and in particular to an assembly method of a vertical energy storage motor with a permanent magnet. Background Art

[0002] Flywheel energy storage motors are mostly vertical structures, consisting of stators, rotating shafts, upper end covers, lower end covers, bearings and other main structures. In order to reduce the friction loss of the energy storage motor rotor during high-speed rotation, magnetic suspension bearings are often used to reduce the load on the bearings. Magnetic bearings are divided into electromagnetic bearings and mechanical permanent magnetic bearings. Mechanical permanent magnetic bearings have the advantages of simple structure and high reliability.

[0003] However, since mechanical permanent magnetic bearings are equipped with permanent magnets, they will generate strong suction to other ferromagnetic materials such as the rotor during assembly, greatly increasing the difficulty of assembly. If the displacement of each component cannot be properly controlled, it is very easy to cause impact, damage the bearing, and even cause a safety accident. The conventional installation method of energy storage motors usually requires the motor to be turned over, and improper insertion of the rotor can easily damage the bearing, especially for motors with permanent magnet bearing systems.

[0004] Therefore, a method for assembling a vertical energy storage motor with a permanent magnet is needed to solve the above technical problems. Summary of the invention

[0005] The invention aims at the technical problems existing in the prior art and provides an assembly method of a vertical energy storage motor with a permanent magnet.

[0006] The technical solution of the present invention to solve the above technical problem is as follows: A method for assembling a vertical energy storage motor with a permanent magnet comprises the following steps:

[0007] Step 1), adjust the lower end cover to a level on the square box, and then fit the lower bearing seat and the lower bearing cover onto the lower end cover;

[0008] Step 2), a plurality of support screws are passed through the lower end cover to adjust the height and level of the rotor;

[0009] Step 3), a guide rod is installed in the first threaded hole at the lower end of the rotor shaft to preliminarily determine the center position of the rotor when it is in place;

[0010] Step 4), remove the lower bearing cover on the lower end cover, install the roller bearing, and reinstall the lower bearing cover;

[0011] Step 5), remove the guide rod in step 3), install a tension bolt in the first threaded hole at the lower end of the rotor shaft and tighten the rotor, at which time the multiple support screws are in contact with the lower side of the rotor to fix the rotor axially;

[0012] Step 6), install a vertical long guide rod in the second threaded hole at the lower end of the stator, the long guide rod passes through the second through hole on the lower end cover, the second through hole corresponds to the second threaded hole one by one, remove the long guide rod after the stator is in place, and firmly fit the stator and the lower end cover;

[0013] Step 7), insert the long guide rod into the third threaded hole at the upper end of the stator, install the permanent magnet magnetic suspension assembly and the upper bearing seat on the upper end cover, and then install the upper end cover on the stator. During the installation process, the long guide rod passes through the third through hole on the upper end cover, and the third through hole corresponds to the third threaded hole one by one. After the upper end cover is in place, remove the long guide rod and firmly fit the upper end cover and the stator;

[0014] Step 8), install the deep groove ball bearing, install the bearing rotation sleeve, and remove the support screw and tension bolt on the lower end cover.

[0015] Preferably, in the above-mentioned method for assembling a vertical energy storage motor with permanent magnets, in step 2), four fourth threaded holes are provided on the lower end cover, and the four fourth threaded holes are arranged in a circular array with the rotating shaft of the rotor as the center, and the support screw passes through the interior of the fourth threaded hole.

[0016] Preferably, in the above-mentioned method for assembling a vertical energy storage motor with permanent magnets, a first through hole is provided on the lower bearing cover, and the first through hole corresponds to the position of the first threaded hole; in the step 3), the guide rod passes through the first through hole; in the step 5), the tightening bolt passes through the first through hole.

[0017] Preferably, in the above-mentioned method for assembling a vertical energy storage motor with permanent magnets, in step 6), the end of the long guide rod is provided with an external thread, and the long guide rod is threadedly connected to the second threaded hole.

[0018] Preferably, in the above-mentioned method for assembling a vertical energy storage motor with a permanent magnet, in step 3), the end of the guide rod is provided with an external thread, and the guide rod is threadedly connected to the first threaded hole.

[0019] The beneficial effects of the present invention are as follows: the assembly method adopts a vertical installation from bottom to top and from inside to outside, the rotor is installed first, and the stator is installed later, and the motor does not need to be turned over. During the installation process, the axial displacement of the rotor is limited by the interaction between the tension bolts and the support screws, avoiding the suction force from impacting the rotor when installing the permanent magnet magnetic suspension assembly. The upper and lower bearings are installed after the rotor is in place, avoiding radial impact on the bearings, ensuring that the bearings will not be damaged during the installation process, reducing costs, and ensuring the success rate of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the internal structure of the present invention after assembly;

[0021] Figure 2 It is a cross-sectional view of the present invention when the stator is mounted;

[0022] Figure 3 This is a partial enlarged view of the roller bearing when the present invention is installed.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Bearing rotary sleeve, 2. Deep groove ball bearing, 3. Upper bearing seat, 4. Permanent magnet magnetic suspension assembly, 5. Upper end cover, 6. Stator, 7. Lower end cover, 8. Support screw, 9. Lower bearing seat, 10. Roller bearing, 11. Tension bolt, 12. Lower bearing cover, 13. Rotor, 14. Long guide rod. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, a method for assembling a vertical energy storage motor with a permanent magnet comprises the following steps:

[0027] Step 1), adjust the lower end cover 7 to a level on the square box, then put the lower bearing seat 9 and the lower bearing cover 12 onto the lower end cover 7, and do not install the roller bearing 10 at this time.

[0028] Step 2), four support screws 8 are passed through the lower end cover 7 to adjust the landing height and level of the rotor 13; wherein, four fourth threaded holes are provided on the lower end cover 7, and the four fourth threaded holes are arranged in a circular array with the rotating shaft of the rotor 13 as the center, and the four support screws 8 pass through the inside of the four fourth threaded holes respectively.

[0029] Step 3), since the lower bearing cover 12 is provided with a first through hole, the first through hole corresponds to the position of the first threaded hole. A guide rod is installed in the first threaded hole at the lower end of the rotating shaft of the rotor 13, the end of the guide rod is provided with an external thread, the guide rod is threadedly connected with the first threaded hole, and the guide rod passes through the first through hole, so as to roughly determine the center position (i.e., the position of the first through hole) when the rotor 13 is in place.

[0030] Step 4), remove the lower bearing cover 12 on the lower end cover 7. Since the roller bearing 10 has not been installed at this time, the rotor 13 can be adjusted in radial direction. When the center of the rotor 13 coincides with the center of the motor, the roller bearing 10 is installed on the lower end cover, and the lower bearing cover 12 is reinstalled. This method has obvious advantages over installing the bearing first and then inserting the rotor. Usually, the rotor is heavy and the displacement control is difficult. If you are not careful, it will hit the bearing and damage it.

[0031] Step 5), remove the guide rod, install the tension bolt 11 in the first threaded hole at the lower end of the rotating shaft of the rotor 13, insert the tension bolt 11 from the first through hole, and tighten the rotor 13. At this time, the rotor 13 can be completely limited in the axial position by pulling four pushes;

[0032] Step 6), install the stator 6. Since the air gap between the stator 6 and the rotor 13 is small, a vertical long guide rod 14 is installed in the second threaded hole at the lower end of the stator 6 as a stator assembly guide. The long guide rod 14 passes through the second through hole on the lower end cover 7. The second through hole corresponds to the second threaded hole one by one. The end of the long guide rod 14 is provided with an external thread, and the long guide rod 14 is threadedly connected with the second threaded hole. After the stator 6 is in place, the long guide rod 14 is removed, and the stator 6 and the lower end cover 7 are firmly assembled by passing the bolt through the second through hole and the second threaded hole.

[0033] Step 7), insert the long guide rod 14 into the third threaded hole at the upper end of the stator 6, install the permanent magnet magnetic suspension assembly 4 and the upper bearing seat 3 on the upper end cover 5, and then install the upper end cover 5 on the stator 6. During the installation process, the long guide rod 14 passes through the third through hole on the upper end cover 5, and the third through hole corresponds to the third threaded hole. At this time, the permanent magnet magnetic suspension assembly 4 generates a suction force close to its own weight on the rotor 13. The rotor 13 will not be sucked up because the tension bolts 11 under the rotor 13 are tightened. After the upper end cover 5 is in place, remove the long guide rod 14, and securely fit the upper end cover 5 and the stator 6 by passing the bolts through the third through hole and the third threaded hole;

[0034] Step 8), install the deep groove ball bearing 2, install the bearing rotation sleeve 1, and remove the support screw 8 and the tension bolt 11 on the lower end cover 7. At this time, the rotor 13 is in a free state within a certain range due to the suction force of the permanent magnetic suspension assembly 4 and the dual effect of its own weight in the axial direction. In the radial direction, it is completely limited by the upper deep groove ball bearing 2 and the lower roller bearing 10.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for assembling a vertical energy storage motor with a permanent magnet, characterized in that: The following steps are involved: Step 1), adjust the lower end cover (7) to a level on the square box, and then put the lower bearing seat (9) and the lower bearing cover (12) onto the lower end cover (7); Step 2), a plurality of support screws (8) are passed through the lower end cover (7) to adjust the landing height and level of the rotor (13); Step 3), a guide rod is installed in the first threaded hole at the lower end of the rotating shaft of the rotor (13), so as to preliminarily determine the center position of the rotor (13) when it is in place; Step 4), remove the lower bearing cover (12) on the lower end cover (7), install the roller bearing (10), and reinstall the lower bearing cover (12); Step 5), remove the guide rod in step 3), install the tensioning bolt (11) in the first threaded hole at the lower end of the rotating shaft of the rotor (13) and tighten the rotor (13), at which time the plurality of support screws (8) are in contact with the lower side of the rotor (13), and the rotor (13) is axially fixed; Step 6), install a vertical long guide rod (14) in the second threaded hole at the lower end of the stator (6), the long guide rod (14) passes through the second through hole on the lower end cover (7), the second through hole corresponds to the second threaded hole one by one, after the stator (6) is in place, remove the long guide rod (14), and firmly fit the stator (6) and the lower end cover (7); Step 7), insert the long guide rod (14) into the third threaded hole at the upper end of the stator (6), install the permanent magnet magnetic suspension assembly (4) and the upper bearing seat (3) on the upper end cover (5), and then install the upper end cover (5) above the stator (6). During the installation process, the long guide rod (14) passes through the third through hole on the upper end cover (5), and the third through hole corresponds to the third threaded hole one by one. After the upper end cover (5) is in place, remove the long guide rod (14), and firmly fit the upper end cover (5) and the stator (6); Step 8), install the deep groove ball bearing (2), install the bearing rotation sleeve (1), and remove the support screw (8) and the tension bolt (11) on the lower end cover (7).

2. The method for assembling a vertical energy storage motor with a permanent magnet according to claim 1, characterized in that: In the step 2), four fourth threaded holes are provided on the lower end cover (7), and the four fourth threaded holes are arranged in a circular array with the rotation axis of the rotor (13) as the center, and the support screw (8) passes through the interior of the fourth threaded holes.

3. The method for assembling a vertical energy storage motor with a permanent magnet according to claim 1, characterized in that: The lower bearing cover (12) is provided with a first through hole, and the first through hole corresponds to the position of the first threaded hole; in the step 3), the guide rod passes through the first through hole; in the step 5), the tensioning bolt (11) passes through the first through hole.

4. The method for assembling a vertical energy storage motor with a permanent magnet according to claim 1, characterized in that: In the step 6), an external thread is provided at the end of the long guide rod (14), and the long guide rod (14) is threadedly connected to the second threaded hole.

5. The method for assembling a vertical energy storage motor with permanent magnets according to claim 1, characterized in that: In the step 3), an external thread is provided at the end of the guide rod, and the guide rod is threadedly connected to the first threaded hole.

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