Sliding bearing permanent magnet vertical motor and assembling method thereof

Abstract

The invention relates to a sliding bearing permanent magnet vertical motor and an assembling method thereof, and relates to the technical field of motor manufacturing, and the assembling method of the sliding bearing permanent magnet vertical motor comprises the steps: S1, installing a bottom frame, a lower rack and a stator, and leveling the bottom frame, the lower rack and the stator; s2, a brake pipeline is fixed to a lower rack; s3, the rotor penetrates into the stator, the lower portion of the rotor is fixed in the radial direction through a first fixing device, and the upper portion of the rotor is fixed in the radial direction through a second fixing device; s4, plugging an air gap base plate into an air gap between the rotor and the stator; s5, when the rotor is in the position locking state, the magnetic steel is installed on the iron core of the rotor, and glue pouring and curing are carried out; and S6, the second fixing device is disassembled, the upper rack is installed, and whole machine assembly is completed. Through the combination of the first fixing device, the second fixing device and the air gap base plate, dual radial fixation is realized, and the uniformity of the air gap of the motor, the symmetry of a magnetic circuit and the operation reliability are guaranteed.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, and in particular to a sliding bearing permanent magnet vertical motor and its assembly method. Background Technology

[0002] Permanent magnet synchronous motors have been widely used in industrial drives, hydropower generation, and new energy fields due to their high efficiency, high power density, and excellent speed regulation performance. Among them, vertical permanent magnet motors are particularly suitable for applications such as water pumps, compressors, and vertical axis wind turbines, and their core feature is that the axial weight of the rotor is directly supported by the bearing system.

[0003] Currently, there are two main bearing support schemes for conventional vertical permanent magnet motors. The first is the more common rolling bearing scheme, which typically uses pairs of angular contact ball bearings or tapered roller bearings at one or both ends of the motor to withstand combined axial and radial loads. In terms of assembly, the common process is to install the magnets first, then insert the rotor. That is, after all permanent magnets are installed and fixed on the rotor core, a guiding device is used to insert the rotor, carrying a strong magnetic field, into the stator cavity. Finally, rolling bearings are used to lock the relative position between the stator and rotor from one end. The second is the sliding bearing scheme. Sliding bearings rely on oil films or other lubricating media to transmit loads. Their force characteristics are more suitable for the operating conditions of vertical motors, where axial loads are primary and radial loads are secondary. They have a low coefficient of friction during operation, and the elasticity of the oil film effectively absorbs vibration and impact, helping to reduce operating noise and improve operational stability. Furthermore, sliding bearings are usually more compact in axial dimensions, which is beneficial for meeting the design requirements of vertical motors with strict structural space constraints.

[0004] However, for vertical permanent magnet motors using sliding bearings, the extremely strong magnetic field generated by the permanent magnets after installation can easily cause violent collisions between the rotor and stator core when the rotor with the magnets installed is inserted into the narrow air gap of the stator. This can result in irreversible scratches or even structural damage, leading to low assembly safety and success rate. Furthermore, the sliding bearing structure itself cannot provide precise and stable radial positioning of the rotor during the assembly process. If the existing assembly process of installing the magnets first and then inserting the rotor is followed, it becomes difficult to ensure and maintain a uniform air gap between the stator and rotor before the magnets are installed. This makes it difficult to balance the structural advantages of sliding bearings with the safety and precision assembly requirements of permanent magnet motors, thus hindering the development and manufacturing of high-performance vertical permanent magnet motors with sliding bearings. Summary of the Invention

[0005] The purpose of this application is to provide a sliding bearing permanent magnet vertical motor and its assembly method to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides an assembly method for a sliding bearing permanent magnet vertical motor, including the following steps: S1. Perform preliminary cleaning of all materials, fix the base frame on the work platform, fix the lower frame on the base frame, fix the stator on the lower frame, and level the base frame, lower frame and stator respectively. S2. Secure the brake lines to the lower frame; S3. Insert the rotor into the stator, and use the first fixing device installed on the lower frame to radially fix and limit the lower part of the rotor, and use the second fixing device installed on the stator to radially fix and limit the upper part of the rotor, so as to lock the position of the rotor and make the air gap between the rotor and the stator uniform. S4. Insert an air gap pad into the air gap between the rotor and the stator, and fix the air gap pad to the rotor. S5. With the rotor in the locked position, install the magnet into the rotor core and then apply adhesive for curing. S6. Remove the second fixing device, install the upper frame, thrust bearing and guide bearing, and complete the final positioning of the rotor and the assembly of the whole machine.

[0007] Furthermore, in S3, the first fixing device includes a first fixing plate, a first fixing screw, and a first clamp. The first fixing plate is fixed to the lower end of the lower frame by bolts. The first clamp is clamped to the lower part of the rotor shaft. A first rubber pad is provided between the first clamp and the rotor shaft. The first fixing screw is connected radially between the first fixing plate and the first clamp to adjust the relative position of the rotor and the stator. The first clamp is a split structure, which is fastened by a combination of bolts, washers and nuts; The first fixing device also includes a second fixing plate, which is bolted to the first clamp and the rotor's oil baffle pipe.

[0008] Furthermore, in S3, the second fixing device includes a third fixing plate, a second fixing screw, and a second clamp. The third fixing plate is fixed to the upper end of the stator by bolts, and the second clamp is clamped to the upper part of the rotor shaft. A second rubber pad is provided between the second clamp and the rotor shaft. The second fixing screw is radially connected between the third fixing plate and the second clamp to adjust the relative position of the rotor and the stator. The second clamp is a split structure, which is fastened by a combination of bolts, washers and nuts.

[0009] Furthermore, the first fixing device is installed through the fixing holes on the lower frame itself, and the second fixing device is installed through the fixing holes on the stator itself.

[0010] Furthermore, in S4, the air gap pad is an L-shaped plate structure made of magnetic shielding material, preferably copper, aluminum or stainless steel. The short side of the air gap pad is fixedly connected to the upper end of the rotor core, and the long side of the air gap pad extends into the air gap between the rotor and the stator.

[0011] Furthermore, S5 also includes a magnet installation auxiliary device, comprising a simulated magnet, a guide box, and a push rod, wherein the magnet installation steps include: S51. Use simulated magnets to verify the passability of the core slot type of all rotors; S52. After the rotor has passed the inspection, a guide box for guiding the magnets is installed inside the pressure ring. S53. Before installing the magnet, check its polarity and apply magnet adhesive around the magnet. S54. Push the magnet into the corresponding magnet slot through the guide box, and push the magnet to the bottom of the slot using the pusher. S55. Repeat steps S53 and S54 to install all magnets one pole at a time. S56. Pour magnetic adhesive into each magnet slot from the top of the rotor. During the curing process of the magnetic adhesive, replenish the magnetic adhesive into the magnet slot at predetermined intervals until no more can be poured in, and the curing is completed.

[0012] Furthermore, the simulated magnet is made of a magnetic shielding material, preferably copper, aluminum, or stainless steel, and the external dimensions of the simulated magnet are consistent with those of the magnet. The guide box is made of magnetic shielding material, preferably copper, aluminum or stainless steel. The outer frame of the guide box is smaller than the inner frame of the magnet slot, the inner frame of the guide box is larger than the outer dimensions of the magnet, and the length of the guide box is greater than the thickness of the rotor pressure ring. The push rod is made of non-metallic magnetic shielding material, preferably nylon.

[0013] Furthermore, in S56, a heating belt is also provided. The heating belt disc is located at the upper end of the rotor and is used to heat the magnetic adhesive in the magnetic groove to improve its fluidity.

[0014] Furthermore, in S3, after the rotor is inserted into the stator, the lower end of the rotor is lifted upward by 2-3mm using a jack, and a pad of equal height is placed on the lower end face of the rotor.

[0015] Furthermore, in S6, this includes: S61. Remove the second fixing device, fix the upper frame on the stator, and level it. S62. Install the thrust bearing, apply a layer of turbine oil to the bearing surface, install the thrust head using a heat-shrink process, and after the thrust head is assembled and cooled, prepare and install the retaining ring, ensuring that the assembly gap between the retaining ring and the thrust head and main shaft is no more than 0.02mm, and place the rotor on the thrust bearing. S63. Install the upper guide bearing and adjust the clearance between the upper guide bearing and the thrust head to 0.08-0.12mm on one side. Install the lower guide shaft bearing and adjust the clearance between the lower guide shaft bearing and the rotor on one side to 0.1-0.15mm; Install the remaining upper and lower frame components; S64. After the rotor is installed in place, slightly lift the bottom jack, remove the leveling pad, lower the rotor until the thrust head contacts the mirror plate, and connect and fix the thrust head and the mirror plate. S65. Inspect and improve the entire machine according to the drawings.

[0016] This application also provides a sliding bearing permanent magnet vertical motor, which is assembled by any of the above-described sliding bearing permanent magnet vertical motor assembly methods.

[0017] The beneficial effects of the technical solution provided in this application include at least the following: (1) By first inserting a non-magnetic rotor into the stator and then installing magnets, this application avoids the huge magnetic attraction force generated when hoisting and inserting a strong magnetic rotor in a narrow space, eliminates the risk of collision between the rotor and the stator, and improves the safety and success rate of assembly.

[0018] (2) This application uses a combination of the first fixing device, the second fixing device and the air gap pad to achieve double radial fixing, which ensures the stability and controllability of the rotor during the adjustment process, and guarantees the uniformity of the motor air gap, the symmetry of the magnetic circuit and the reliability of operation. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the installation structure of the first fixing device in one embodiment of the present invention; Figure 2 yes Figure 1 A-direction view; Figure 3 This is a schematic diagram of the installation structure of the second fixing device in one embodiment of the present invention; Figure 4 yes Figure 3 View from direction B; Figure 5 This is a schematic diagram of the structure of the air gap pad in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a simulated magnet in one embodiment of the present invention; Figure 7 This is a schematic diagram of the guide box structure in one embodiment of the present invention; Figure 8 This is a schematic diagram of the push rod structure in one embodiment of the present invention; Figure 9 This is a schematic diagram of the installation structure of the thrust head in one embodiment of the present invention.

[0020] Explanation of key figure labels: 10. Lower frame; 20. Stator; 30. Rotor; 31. Oil baffle pipe; 40. First fixing device; 41. First fixing plate; 42. First fixing screw; 43. First clamp; 44. First rubber pad; 45. Second fixing plate; 50. Second fixing device; 51. Third fixing plate; 52. Second fixing screw; 53. Second clamp; 54. Second rubber pad; 60. Air gap pad; 71. Simulated magnet; 72. Guide box; 73. Push rod; 81. Thrust head; 82. Thrust bearing; 83. Mirror plate. Detailed Implementation

[0021] 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.

[0022] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.

[0023] Example Please refer to Figures 1-9 An assembly method for a sliding bearing permanent magnet vertical motor includes the following steps: S1. Perform preliminary cleaning of all materials, fix the base frame on the work platform, fix the lower frame 10 on the base frame, fix the stator 20 on the lower frame 10, and level the base frame, lower frame 10 and stator 20 respectively. S2. Secure the brake lines to the lower frame 10; S3. Insert the rotor 30 into the stator 20. The lower part of the rotor 30 is radially fixed and limited by the first fixing device 40 installed on the lower frame 10, and the upper part of the rotor 30 is radially fixed and limited by the second fixing device 50 installed on the stator 20, so as to lock the position of the rotor 30 and make the air gap between the rotor 30 and the stator 20 uniform. S4. Insert an air gap pad 60 into the air gap between the rotor 30 and the stator 20, and fix the air gap pad 60 to the rotor 30. S5. With the rotor 30 in the locked position, install the magnet into the iron core of the rotor 30 and perform potting and curing. S6. Remove the second fixing device 50, install the upper frame, thrust bearing and guide bearing, and complete the final positioning of rotor 30 and assembly of the whole machine.

[0024] In this embodiment, in step S1, firstly, materials are prepared according to the corresponding motor assembly drawings, and each item is prepared. Since the assembly scheme of this application is to first insert the rotor 30 and then install the magnet test, it is necessary to clean up the assembly site to prevent small iron parts from falling into the magnet installation area and clean up all materials.

[0025] Next, place the base frame on the cleaned platform, ensuring it is firmly supported between itself and the platform. Secure the base frame to the platform with fasteners or pressure plates, and level it using a spirit level. After the base frame is in place, use a spirit level (such as a frame level) for measurement and adjustment. The frame level has an accuracy of up to 0.02 mm / m, and the allowable horizontal deviation of the frame is 0.02 mm / m. The base frame is either self-contained or a test fixture, primarily used for support during the final motor assembly test. Place the lower frame 10 on the base frame and secure it with fasteners, such as bolts. Level the lower frame 10 and the base frame using a spirit level. After the lower frame 10 is in place, use a frame level for measurement and adjustment. The allowable horizontal deviation of the lower frame 10 is 0.02 mm / m. The stator 20 is suspended on the lower frame 10 and fixed to the lower frame 10 with fasteners such as bolts. The stator 20 is leveled with a spirit level. After the stator 20 is installed in place, it is measured and adjusted with a frame level. The allowable deviation of the stator 20 in level is 0.02 mm / m.

[0026] In addition, if the test station has a pit, assembly and testing can be carried out directly at the test station. The base frame can be sunk into the pit for installation, reducing the installation height of the workpiece, thereby reducing the time and preparation for personnel to climb to heights, facilitating the installation of magnets, and thus improving the safety and convenience of subsequent operations.

[0027] In step S2, the brake line is required when the synchronizing machine needs to stop, decelerate, or brake urgently. During installation, the brake line and its brake plate assembly are installed onto the preset interface of the lower frame 10 and secured with fasteners. After installation, the brake line is powered on for testing to verify that all brakes can achieve synchronous and smooth rising and falling movements, ensuring their functional consistency and reliability, and preparing for the subsequent temporary support of the rotor 30.

[0028] In step S3, special lifting devices are installed at both ends of the rotor 30 without magnets to smoothly lift the rotor 30 and vertically insert it into the inner cavity of the stator 20. Close monitoring is required during insertion to prevent the rotor 30 from contacting and scratching the stator 20 core. After the rotor 30 is in place, its lower end rests on the pre-adjusted brake. At this time, the first fixing device 40, pre-installed on the lower fixing hole of the lower frame 10, radially limits the lower end of the rotor 30 to prevent bottom swaying. Simultaneously, the second fixing device 50, installed on the upper fixing hole of the stator 20 base, radially adjusts and locks the upper part of the rotor 30. By coordinating the adjustment of these two devices, the axis of the rotor 30 coincides with the axis of the stator 20, thereby ensuring a uniform circumferential air gap.

[0029] In step S4, pre-prepared air gap pads 60 are inserted into the uniformly adjusted air gap between the stator 20 and rotor 30 at multiple points. The thickness of the pads is consistent with the designed air gap value. After insertion, the air gap pads 60 are reliably fixed to the rotor 30 body using screws, clips, or special adhesives, thereby maintaining a uniform air gap space state and avoiding possible displacement of the rotor 30 in subsequent operations.

[0030] In step S5, with the rotor 30 locked, the magnets are installed and cured by injecting magnet adhesive.

[0031] In step S6, after the magnets are cured, the upper second fixing device 50 and air gap pad 60 are removed, the upper frame with assembled internal components is hoisted onto the stator 20, leveled and fixed, and the remaining accessories are installed to complete the assembly of the whole machine.

[0032] In the above steps, by first inserting the non-magnetic rotor 30 into the stator 20 and then installing the magnets, the huge magnetic attraction force generated when hoisting and inserting the strong magnetic rotor 30 in a narrow space is avoided, eliminating the risk of collision between the rotor 30 and the stator 20, and improving the safety and success rate of assembly. In addition, the combination of the first fixing device 40, the second fixing device 50 and the air gap pad 60 ensures the stability and controllability of the rotor 30 during the adjustment process. The air gap pad 60 ensures that the installation conditions and adjustment results of the magnets are consistent. Before the bearings are installed, the centering position and uniform air gap of the rotor 30 can be accurately adjusted and locked, creating a stable and precise process environment for the subsequent installation of the magnets, thereby ensuring the uniformity of the air gap, the symmetry of the magnetic circuit and the reliability of operation of the final motor.

[0033] In the specific structure of the first fixing device 40, in S3, the first fixing device 40 includes a first fixing plate 41, a first fixing screw 42, and a first clamp 43. The first fixing plate 41 is fixed to the lower end of the lower frame 10 by bolts. The first clamp 43 is clamped to the lower part of the rotor 30 shaft. A first rubber pad 44 is provided between the first clamp 43 and the rotor 30 shaft. The first fixing screw 42 is radially connected between the first fixing plate 41 and the first clamp 43 to adjust the relative position of the rotor 30 and the stator 20. The first clamp 43 is a split structure, which is fastened by a combination of bolts, washers, and nuts. The first fixing device 40 also includes a second fixing plate 45, which is bolted to the first clamp 43 and the oil baffle pipe 31 of the rotor 30.

[0034] In this embodiment, as Figure 1 , Figure 2 As shown, multiple first fixing plates 41 and first fixing screws 42 are provided, with the same number of first fixing plates 41 and first fixing screws 42, for example, four of each. The four first fixing plates 41 are evenly spaced along the circumference of the rotor 30. The first fixing plate 41 has an L-shaped plate structure with bolt holes on one side, and is fixed to the mounting plane or interface at the bottom of the lower frame 10 by bolts. The first clamp 43 adopts a split structure, consisting of two semi-circular arc plates. These two semi-circular arc plates are surrounded and locked to the lower part of the rotor 30 shaft by a combination of bolts, washers, and nuts. A first rubber pad 44 is placed between the first clamp 43 and the rotor 30 shaft. The first rubber pad 44 is made of wear-resistant and oil-resistant elastic material to provide uniform contact pressure and a certain friction force to ensure reliable clamping.

[0035] The first fixing screw 42 is arranged horizontally in the radial direction. One end of it is fixedly connected to the other side of the first fixing plate 41 by a locking nut, and the other end is pushed against the adjusting seat on the outside of the first clamp 43 by a ball joint or washer. By turning the first fixing screw 42, the first clamp 43 and the rotor 30 shaft segment held by it can be pushed or pulled smoothly, so as to realize the slight movement of the lower end of the rotor 30 in the horizontal plane, thereby adjusting the coaxiality of the rotor 30 and the stator 20.

[0036] In addition, the first fixing device 40 is also provided with a plurality of second fixing plates 45. The number of second fixing plates 45 is consistent with the number of oil baffles 31. In this embodiment, there are four second fixing plates 45, which are distributed around the rotor 30. The second fixing plates 45 are L-shaped plate structures, one side of which is fixedly connected to the oil baffles 31 by bolts, and the other side is fixedly connected to the periphery of the first clamp 43, thereby fixing the oil baffles 31 and improving the overall rigidity.

[0037] During the installation process, before the rotor 30 is inserted into the stator 20, the first fixing plate 41 is installed at the designated position on the lower frame 10. After the rotor 30 is in place, the two semi-circular first clamps 43, each equipped with a first rubber pad 44, are fitted together on the designated shaft section at the lower end of the rotor 30 and initially tightened with bolts. At the same time, the second fixing plate 45 is used to connect the clamps to the oil baffle pipe 31 of the rotor 30, forming an additional constraint to prevent rotation. When it is necessary to adjust the center position of the lower end of the rotor 30, the operator uses a wrench to turn the two mutually perpendicular first fixing screws 42 and controls the radial displacement of the rotor 30 by observing measuring instruments (such as dial indicators). When the axis of the rotor 30 is aligned with the axis of the stator 20 and the air gap uniformity meets the requirements, the bolts of the first clamps 43 are finally tightened, and the locking nuts of the first fixing screws 42 are locked. At this time, the lower end of the rotor 30 forms a temporary, high-rigidity mechanical connection with the sturdy lower frame 10 through this device, completely restricting its radial degree of freedom. After the magnets are installed and the upper frame bearing system is assembled, loosen and remove the device in reverse order to restore the rotor 30 to its free state supported by the sliding bearing system.

[0038] In the specific structure of the second fixing device 50, in S3, the second fixing device 50 includes a third fixing plate 51, a second fixing screw 52, ​​and a second clamp 53. The third fixing plate 51 is fixed to the upper end of the stator 20 by bolts. The second clamp 53 is clamped to the upper part of the shaft of the rotor 30. A second rubber pad 54 is provided between the second clamp 53 and the shaft of the rotor 30. The second fixing screw 52 is radially connected between the third fixing plate 51 and the second clamp 53 to adjust the relative position of the rotor 30 and the stator 20. The second clamp 53 is a split structure, which is fastened by a combination of bolts, washers, and nuts.

[0039] In this embodiment, as Figure 3 , Figure 4 As shown, the structure of the second fixing device 50 is similar to that of the first fixing device 40. There are four third fixing plates 51 and four second fixing screws 52. The four third fixing plates 51 are evenly distributed around the circumference of the rotor 30. The third fixing plate 51 is an L-shaped plate structure with bolt holes on one side. It is fixed to the mounting plane or interface on the upper part of the stator 20 by bolts. The second clamp 53 adopts a split structure, which consists of two semi-circular arc plates. The two semi-circular arc plates are surrounded and locked to the upper part of the shaft of the rotor 30 by bolts, washers and nuts. A second rubber pad 54 is placed between the second clamp 53 and the shaft of the rotor 30 to provide uniform contact pressure and a certain friction force to ensure reliable clamping.

[0040] The second fixing screw 52 is arranged horizontally in the radial direction. One end of it is fixedly connected to the other side of the third fixing plate 51 by a locking nut, and the other end is pushed against the adjusting seat on the outside of the second clamp 53 by a ball joint or washer. By turning the second fixing screw 52, ​​the second clamp 53 and the rotor 30 shaft segment held by it can be pushed or pulled smoothly, so as to realize the slight movement of the lower end of the rotor 30 in the horizontal plane, thereby adjusting the coaxiality of the rotor 30 and the stator 20.

[0041] The first fixing device 40 is installed through the fixing holes of the lower frame 10, and the second fixing device 50 is installed through the fixing holes of the stator 20.

[0042] In this embodiment, the position, number, and size of the through holes on the first fixing plate 41 correspond to the self-fixing holes (usually threaded holes or smooth holes used to connect other components or as process references) that already exist in the original design and manufacturing of the lower frame 10. Therefore, no additional drilling, tapping, or welding operations are required on the lower frame 10 during installation. Similarly, the mounting holes on the third fixing plate 51 are aligned with the self-fixing holes (commonly threaded holes on the end face of the frame or connecting holes on the stiffener plate) that have been machined during the manufacturing stage of the stator 20 base. This ensures that the integrity of the stator 20 core laminations and the frame is not compromised, and no additional machining processes are required on this critical electromagnetic component, the stator 20.

[0043] In addition, in S4, the air gap pad 60 is an L-shaped plate structure made of magnetic shielding material, preferably copper, aluminum or stainless steel. The short side of the air gap pad 60 is fixedly connected to the upper end of the iron core of the rotor 30, and the long side of the air gap pad 60 extends into the air gap between the rotor 30 and the stator 20.

[0044] In this embodiment, as Figure 5 As shown, where Figure 5 a is a side view of the air gap pad 60. Figure 5b is a front view of the air gap pad 60. The air gap pad 60 can be made of magnetic shielding materials such as copper, aluminum, or stainless steel, so that it can be placed between the stator and rotor 30 to prevent them from attracting each other when magnets are installed. The air gap pad 60 has an L-shaped plate structure. One end of its short side is engaged and fixed to the rotor 30 body to prevent it from falling off due to changes in the air gap at one end caused by the attraction force when installing magnets. In addition, it can also be fixed to the frame or other parts of the motor itself. One end of its long side extends into the air gap. The L-shaped structure is simple, easy to manufacture, and also easy to remove after use.

[0045] Additionally, S5 includes a magnet installation auxiliary device, comprising a simulated magnet 71, a guide box 72, and a push rod 73. The magnet installation steps include: S51. Use simulated magnets 71 to perform passability checks on the core slot type of all rotors 30; S52. Insert the guide box 72 for guiding the magnet into the pressure ring of the rotor 30 after the verification is passed. S53. Before installing the magnet, check its polarity and apply magnet adhesive around the magnet. S54. The magnet is pushed into the corresponding magnet slot through the guide box 72, and the magnet is pushed to the bottom of the slot using the push rod 73. S55. Repeat steps S53 and S54 to install all magnets one pole at a time. S56. Pour magnetic adhesive into each magnetic slot from the top of the rotor 30. During the curing process of the magnetic adhesive, replenish the magnetic adhesive into the magnetic slot at predetermined intervals until no more can be poured in, and complete the curing.

[0046] Specifically, the simulated magnet 71 is made of a magnetically shielding material, preferably copper, aluminum, or stainless steel, and the external dimensions of the simulated magnet 71 are the same as those of the magnet. The guide box 72 is made of a magnetically shielding material, preferably copper, aluminum, or stainless steel, and the outer frame of the guide box 72 is smaller than the inner frame of the magnet slot, the inner frame of the guide box 72 is larger than the external dimensions of the magnet, and the length of the guide box 72 is greater than the thickness of the rotor 30 pressure ring. The push rod 73 is made of a non-metallic magnetically shielding material, preferably nylon.

[0047] In this embodiment, as Figure 6 , Figure 7 , Figure 8 As shown, in step S51, before installing the real magnets, all rotor core slots 30 are first checked for passability using simulated magnets 71. The simulated magnets 71 are made of magnetically shielding material (such as copper, aluminum, or stainless steel), and their dimensions are identical to those of the real magnets. Operators attempt to place them one by one into each magnet slot and simulate the pushing action to ensure that all slot types meet the installation requirements, thus avoiding the risk of the real magnets getting stuck during installation.

[0048] In step S52, after all slot type verifications are passed, a guide box 72 is installed on the pressure ring of the rotor 30. The guide box 72 is also made of magnetic shielding material (such as copper, aluminum or stainless steel). Its outer frame cross-sectional dimension is slightly smaller than the inner frame dimension of the magnet slot so that it can be smoothly inserted into the slot. Its inner frame channel dimension is slightly larger than the outer dimension of the magnet, forming a guide gap. Its axial length is greater than the thickness of the pressure ring of the rotor 30, thereby forming a stable and extended guide funnel outside the slot. At the same time, the length of the guide box 72 exceeds the pressure ring of the rotor 30 by a certain safety distance to prevent attraction when the magnet is inserted.

[0049] In step S53, before installing each real magnet, firstly, the polarity of the magnet is checked using a polarity pen or magnetic pole detector to ensure that its polarity direction is consistent with the magnetic circuit design of rotor 30, preventing reverse installation. Secondly, a predetermined amount of magnetic adhesive is evenly applied to the side (non-polar surface) and end of the magnet to prepare for subsequent fixing.

[0050] In step S54, the prepared magnet is placed close to the entrance of the guide box 72. Guided by its inner frame, the magnet is easily and accurately aligned with the magnet slot. Then, the pusher 73 is used to press against the non-magnetic end face of the magnet and apply a steady pushing force along the guide box 72 to push the magnet through the guide box 72 and into the magnet slot until the pusher 73 confirms that it has been pushed to the bottom of the slot and is completely in place. The pusher 73 is made of non-metallic magnetic shielding material such as nylon to prevent it from being attracted to the magnet and to avoid damaging the magnet.

[0051] In step S55, steps S53 and S54 are repeated, and the polarity of each magnet is detected, glued, and guided and pushed one by one according to the predetermined magnetic pole sequence until all magnets are installed.

[0052] In step S56, after all magnets are installed in place, adhesive is injected for fixation. Adhesive is poured into the remaining gaps in each magnet slot from the top of the rotor 30. A multi-stage injection process is used. After the initial filling, during the adhesive curing process, the adhesive surface shrinkage is checked at predetermined intervals (e.g., hourly), and new adhesive is injected as needed. This process is repeated until the adhesive stops descending and no more can be injected, ensuring that the gaps in the slots are completely and densely filled with adhesive. Finally, the slots are allowed to stand for final curing.

[0053] In the above steps, by simulating the pre-slot verification of the magnet 71, manufacturing defects can be effectively detected in advance, avoiding damage or jamming of the real magnet during installation. In addition, the multi-stage glue-filling and curing process effectively overcomes the problem of internal voids or incomplete filling that may be caused by the shrinkage of the glue during curing in a single glue-filling process. Through continuous replenishment, it is ensured that the gap between the magnet and the core slot wall is completely and densely filled by the glue.

[0054] More specifically, in S56, a heating belt is also provided. The heating belt disc is located at the upper end of the rotor 30 to heat the magnetic adhesive in the magnetic slot, thereby improving its fluidity. In winter or low-temperature environments, the fluidity of the magnetic adhesive decreases. Therefore, a heating belt is provided and placed at the upper end of the iron core of the rotor 30 after the adhesive is applied to heat the magnetic adhesive and improve its fluidity in the magnetic slot.

[0055] In addition, in S3, after the rotor 30 is inserted into the stator 20, the lower end of the rotor 30 is lifted upward by 2-3mm using a jack, and a pad of equal height is placed on the lower end face of the rotor 30.

[0056] More specifically, in S6, this includes: S61. Remove the second fixing device 50, fix the upper frame on the stator 20, and level it. S62. Install the thrust bearing 82, apply a layer of turbine oil to the bearing surface, install the thrust head 81 using a heat-shrink process, and after the thrust head 81 is assembled and cooled, prepare and install the retaining ring to ensure that the assembly gap between the retaining ring and the thrust head 81 and the main shaft is no more than 0.02mm, and place the rotor 30 on the thrust bearing 82. S63. Install the upper guide bearing and adjust the clearance between the upper guide bearing and the thrust head 81 to 0.08-0.12mm on one side. Install the lower guide shaft bearing and adjust the clearance between the lower guide shaft bearing and rotor 30 on one side to 0.1-0.15mm; Install the remaining 10 components of the upper and lower frames; S64. After the rotor 30 is installed in place, slightly lift the bottom jack, remove the leveling pad, and lower the rotor 30 until the thrust head 81 contacts the mirror plate 83, and connect and fix the thrust head 81 and the mirror plate 83. S65. Inspect and improve the entire machine according to the drawings.

[0057] In this embodiment, as Figure 9 As shown, after the rotor 30 is inserted into the stator 20, its lower end rests on the brake. At this time, the operator uses one or more hydraulic or mechanical jacks to smoothly and synchronously lift the entire rotor 30 upwards by 2-3mm from the center of the bottom of the rotor 30 or symmetrically arranged bearing points. This is to avoid scratches or thermal damage from contact between the thrust head 81 and the thrust bearing 82 during subsequent installation. After lifting it into place, a set of equal-height pads are symmetrically inserted between the lower flange surface or the bottom surface of the thrust plate of the rotor 30 and the brake or fixed base below to ensure the levelness of the support plane. Then, the pressure of the jacks is slowly removed, so that the entire axial weight of the rotor 30 is borne by this set of equal-height pads.

[0058] Specifically, step S6 includes: In step S61, the second fixing device 50 used to fix the upper part of the rotor 30 is removed, and the upper frame with the pre-installed internal components is hoisted to the upper end of the stator 20. It is initially connected with bolts, and a frame level is used to finely level the upper frame on the precision-machined plane until the levelness reaches the requirement of 0.02mm / m. Then all connecting bolts are tightened.

[0059] In step S62, a thrust bearing 82 is installed on the thrust bearing seat of the upper frame, and a layer of clean turbine oil is evenly applied to the bearing surface. The thrust head 81 is heated to the predetermined expansion temperature, then accurately aligned with the end of the rotor 30 shaft and fitted in, pushed to the designed axial position. After it cools to room temperature and fully contracts to grip the main shaft, the retaining ring is precisely fitted on-site according to the actual size of the retaining ring groove on the shaft. The thickness of the retaining ring must be uniform. After assembly, a feeler gauge is used to check to ensure that the total gap between the retaining ring and the end face of the thrust head 81 and the side of the retaining ring groove of the main shaft is not greater than 0.02mm, so as to ensure the rigidity of axial positioning.

[0060] In step S63, the upper guide bearing is installed into the guide bearing seat of the upper frame. Using a feeler gauge or lifting method, the single-sided gap between each guide bearing and the outer circular surface of the thrust head 81 is adjusted by adjusting the wedge block or jack screw on the back of the bearing, so that it is evenly distributed in the range of 0.08mm to 0.12mm.

[0061] Similarly, install the lower guide bearing to the guide bearing seat of the lower frame 10, and adjust the single-sided clearance between it and the outer circular surface of the lower sliding rotor 30 of the rotor 30, uniformly controlling it between 0.10mm and 0.15mm. After adjustment, install the bearing cover, seal, and other components of the upper and lower frames 10.

[0062] In step S64, after all bearings are assembled and adjusted, the bottom jack is operated to slightly lift the rotor 30, and then all the leveling blocks are completely removed. Subsequently, the jack is slowly and steadily lowered so that the rotor 30 is completely seated on the thrust bearing 82 under its own weight, achieving close contact between the thrust head 81 and the mirror plate 83 (or directly with the thrust bearing 82). Finally, the thrust head 81 and the mirror plate 83 are fixed according to the designed connection method.

[0063] In step S65, in accordance with the assembly drawings and technical requirements, a final inspection and improvement is carried out on all connections, clearances, seals and electrical components of the whole machine.

[0064] In addition, this application also provides a sliding bearing permanent magnet vertical motor, which is assembled by the assembly method of the sliding bearing permanent magnet vertical motor.

[0065] In the embodiments disclosed in this application, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this application according to the specific circumstances.

[0066] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An assembly method for a sliding bearing permanent magnet vertical motor, characterized in that, Includes the following steps: S1. Perform preliminary cleaning of all materials, fix the base frame on the working platform, fix the lower frame on the base frame, fix the stator on the lower frame, and level the base frame, the lower frame and the stator respectively. S2. Secure the brake lines to the lower frame; S3. Insert the rotor into the stator, and use the first fixing device installed on the lower frame to radially fix and limit the lower part of the rotor, and use the second fixing device installed on the stator to radially fix and limit the upper part of the rotor, so as to lock the position of the rotor and make the air gap between the rotor and the stator uniform. S4. Insert an air gap pad into the air gap between the rotor and the stator, and fix the air gap pad to the rotor. S5. When the rotor is in the locked position, install the magnet into the rotor core and perform potting and curing. S6. Remove the second fixing device, install the upper frame, thrust bearing and guide bearing, and complete the final positioning of the rotor and the assembly of the whole machine.

2. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 1, characterized in that, In S3, the first fixing device includes a first fixing plate, a first fixing screw, and a first clamp. The first fixing plate is fixed to the lower end of the lower frame by bolts. The first clamp is clamped to the lower part of the rotor shaft. A first rubber pad is provided between the first clamp and the rotor shaft. The first fixing screw is radially connected between the first fixing plate and the first clamp to adjust the relative position of the rotor and the stator. The first clamp is a split structure, which is fastened by a combination of bolts, washers and nuts; The first fixing device also includes a second fixing plate, which is bolted to the first clamp and the oil baffle of the rotor.

3. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 1, characterized in that, In S3, the second fixing device includes a third fixing plate, a second fixing screw, and a second clamp. The third fixing plate is fixed to the upper end of the stator by bolts. The second clamp is clamped to the upper part of the rotor shaft. A second rubber pad is provided between the second clamp and the rotor shaft. The second fixing screw is radially connected between the third fixing plate and the second clamp to adjust the relative position of the rotor and the stator. The second clamp is a split structure, which is fastened by a combination of bolts, washers and nuts.

4. The assembly method of the sliding bearing permanent magnet vertical motor according to any one of claims 2-3, characterized in that, The first fixing device is installed through the fixing holes of the lower frame itself, and the second fixing device is installed through the fixing holes of the stator itself.

5. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 1, characterized in that, In S4, the air gap pad is an L-shaped plate structure made of magnetic shielding material, preferably copper, aluminum or stainless steel. The short side of the air gap pad is fixedly connected to the upper end of the rotor core, and the long side of the air gap pad extends into the air gap between the rotor and the stator.

6. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 1, characterized in that, S5 also includes a magnet installation auxiliary device, comprising a simulated magnet, a guide box, and a push rod, wherein the magnet installation steps include: S51. Use the simulated magnet to perform passability verification on the core slot type of all the rotors; S52. After the rotor has passed the inspection, the guide box for guiding the magnet is installed inside the pressure ring. S53. Before installing the magnet, check its polarity and apply magnet adhesive around the magnet; S54. Push the magnet into the corresponding magnet slot through the guide box, and push the magnet to the bottom of the slot using the pusher. S55. Repeat steps S53 and S54 to install all magnets one pole at a time. S56. Pour magnetic adhesive into each magnetic slot from the upper end of the rotor. During the curing process of the magnetic adhesive, replenish the magnetic adhesive into the magnetic slot at predetermined intervals until no more can be poured in, and complete the curing.

7. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 6, characterized in that, The simulated magnet is made of a magnetic shielding material, preferably copper, aluminum, or stainless steel, and the external dimensions of the simulated magnet are the same as those of the magnet. The guide box is made of magnetic shielding material, preferably copper, aluminum or stainless steel. The outer frame of the guide box is smaller than the inner frame of the magnet slot, the inner frame of the guide box is larger than the outer dimensions of the magnet, and the length of the guide box is greater than the thickness of the rotor pressure ring. The push rod is made of a non-metallic magnetic shielding material, preferably nylon.

8. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 6, characterized in that, In S56, a heating belt is also provided. The heating belt is arranged on the upper end of the rotor and is used to heat the magnetic adhesive in the magnetic groove to improve its fluidity.

9. The assembly method of the sliding bearing permanent magnet vertical motor according to claim 1, characterized in that, In step S3, after the rotor is inserted into the stator, the lower end of the rotor is lifted upward by 2-3mm using a jack, and a pad of equal height is placed on the lower end face of the rotor. The S6 includes: S61. Remove the second fixing device, fix the upper frame on the stator, and level it. S62. Install the thrust bearing, apply a layer of turbine oil to the bearing surface, install the thrust head using a heat-shrink process, and after the thrust head is assembled and cooled, prepare and install the retaining ring to ensure that the assembly gap between the retaining ring and the thrust head and main shaft is no greater than 0.02mm, and place the rotor on the thrust bearing. S63. Install the upper guide bearing and adjust the single-sided gap between the upper guide bearing and the thrust head to 0.08-0.12mm; Install the lower guide shaft bearing and adjust the clearance between the lower guide shaft bearing and the rotor on one side to 0.1-0.15mm; Install the remaining upper and lower frame components; S64. After the rotor is installed in place, slightly lift the bottom jack, remove the equal height pad, lower the rotor until the thrust head contacts the mirror plate, and connect and fix the thrust head to the mirror plate. S65. Inspect and improve the entire machine according to the drawings.

10. A sliding bearing permanent magnet vertical motor, characterized in that, It is assembled using the assembly method of the sliding bearing permanent magnet vertical motor according to any one of claims 1-9.

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