Assembly structure for connecting motor and exciter

Abstract

The utility model relates to the technical field of motor and exciter assembly, in particular to a motor and exciter connection assembly structure which comprises a motor end cover and an exciter stator, an annular fixing frame is arranged on the front side of the motor end cover, a plurality of supporting columns are fixedly installed between the annular fixing frame and the motor end cover, and ventilation cavities are preset in the supporting columns. The ventilation cavity is communicated with the left side of the motor end cover and the right side of the annular fixing frame, a plurality of stator installation frames are installed on the right side of the annular fixing frame at equal intervals, stator retainers are installed on the inner sides of the stator installation frames, and exciter stators are installed on the stator retainers. According to the utility model, the motor end cover and the exciter stator are installed and connected through the support column, and the ventilation cavity is arranged in the support column, so that the interior of the motor and the interior of the exciter are communicated, the ventilation and heat dissipation system on the motor can ventilate and dissipate heat for the motor and the interior of the exciter, the structure is simple, and the cost is low. The use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of motor and exciter assembly technology, specifically to an assembly structure for connecting a motor and an exciter. Background Technology

[0002] Synchronous motor exciters have long been plagued by difficulties in maintenance and replacement, as well as poor heat dissipation. Traditionally, exciters are installed within the main motor and share the same airflow path, increasing the complexity of installation and maintenance. Maintenance often requires disassembling the motor rotor, making it quite challenging. Alternatively, the exciter can be positioned outside the main motor, supported by a mounting base and additional ventilation ducts drawing air from the main motor. This design increases the motor's center height due to the added exciter base, and the extra ducts and base further increase the motor's weight. Exciter maintenance involving the removal of numerous components is extremely difficult, significantly increasing maintenance time, disrupting normal operating schedules, and potentially increasing the risk of motor damage, thus raising the difficulty and cost of maintenance. Utility Model Content

[0003] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0004] An assembly structure connecting a motor and an exciter includes a motor end cover and an exciter stator. An annular fixing frame is provided on the front side of the motor end cover. Multiple support columns are fixedly installed between the annular fixing frame and the motor end cover. A ventilation cavity is preset in the support column. The ventilation cavity connects the left side of the motor end cover and the right side of the annular fixing frame. Multiple stator mounting frames with equal spacing are installed on the right side of the annular fixing frame. A stator retainer is installed inside the stator mounting frame. The exciter stator is installed on the stator retainer.

[0005] Furthermore, multiple support rods are fixedly installed between the annular fixing frame and the motor end cover at a position offset from the support column. Since the support column has a ventilation cavity, its strength is reduced to some extent; therefore, additional support rods are provided to ensure the fixing strength between the annular fixing frame and the motor end cover.

[0006] Furthermore, an annular baffle is installed inside the annular fixing frame, and a bearing sealing kit is installed inside the baffle. This restricts ventilation between the motor and the exciter to only occur through the ventilation cavity.

[0007] Furthermore, an air guide duct is fixed to the ventilation cavity position corresponding to the support column on the front side of the annular fixed frame, and the air guide duct is obliquely arranged towards the exciter stator. The air guide duct can directly guide the airflow blown towards the exciter to the stator and rotor of the exciter, thereby ensuring the heat dissipation effect of the exciter.

[0008] Furthermore, a fixing plate is installed on the outer side of the stator retainer corresponding to each stator mounting bracket position. Multiple shims are placed between the fixing plate and the stator mounting bracket. Holes are drilled at both ends of the fixing plate and the shims, as well as on the corresponding stator mounting brackets, and fixing bolts are installed in these holes. The fixing plate, shims, and stator mounting brackets are fixed together by these bolts. Adding or removing shims in corresponding directions can adjust the center position of the entire exciter stator, thereby adjusting the concentricity with the exciter rotor.

[0009] Furthermore, a stator mounting platform is provided on the front side of the annular fixing frame away from the motor end cover. The stator mounting frame is fixed to the stator mounting platform, and a column is fixed on the annular fixing frame at the position corresponding to the stator mounting platform. A sleeve hole is opened on the stator mounting platform at the position corresponding to the column, and a movable threaded sleeve is fitted into the sleeve hole. The front end of the column extends into the threaded sleeve and is threadedly connected. The rotation of the threaded sleeve can drive the stator mounting platform to move, thereby adjusting the specific installation position of the stator, which can be adjusted as needed.

[0010] Furthermore, a limiting plate is fixed to the outer rear end of the threaded sleeve, abutting against the rear side of the stator mounting platform. A fixing ring plate is fixed to the threaded sleeve on the front side of the stator mounting platform. The threaded sleeve is rotatably fixed to the stator mounting platform through the limiting plate and the fixing ring plate. This restricts the relative rotation and fixation between the threaded sleeve and the stator mounting platform, maintaining the adjustment effect on the stator mounting platform.

[0011] Furthermore, the threaded sleeve has a through hole at its front end, and a threaded hole is pre-set inside the column. An anti-loosening bolt extends into the threaded hole and is threadedly connected to it. Tightening the anti-loosening bolt presses the threaded sleeve against the column to prevent the threaded sleeve from rotating easily.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a support column to install and connect the motor end cover and the exciter stator, and sets a ventilation cavity in the support column, so that the motor and the exciter are connected. The ventilation and heat dissipation system on the motor will ventilate and dissipate heat on the exciter at the same time. The structure is simple and easy to use.

[0014] 2. The present invention includes an air duct, which guides the airflow to the exciter and directs it onto the stator and rotor of the exciter, thereby ensuring the ventilation and heat dissipation effect of the exciter.

[0015] 3. In this utility model, shims are used to fill the space between the stator cage and the stator mounting bracket. By adjusting the number of shims in the corresponding direction, the center position of the entire exciter stator can be adjusted, thereby making it concentric with the exciter rotor.

[0016] 4. In this utility model, the rotation of the threaded sleeve drives the entire stator mounting bracket to move relative to the annular fixed bracket, thereby adjusting the position of the exciter stator and making adaptive adjustments according to the specific rotor position. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention;

[0018] Figure 2 This is a rear view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This is a schematic diagram of the support column arrangement in this utility model;

[0021] Figure 5 This is an enlarged view of point A in this utility model;

[0022] Figure 6 This is an enlarged view of point B in this utility model.

[0023] Reference numerals in the attached drawings: 1. Motor end cover; 2. Annular fixing bracket; 3. Stator mounting platform; 4. Support column; 5. Support rod; 6. Stator retainer; 7. Exciter stator; 8. Stator mounting bracket; 9. Ventilation cavity; 10. Baffle plate; 11. Bearing sealing kit; 12. Air guide pipe; 13. Fixing plate; 14. Gasket; 15. Fixing bolt; 16. Column; 17. Threaded sleeve; 18. Limiting support plate; 19. Fixing ring plate; 20. Anti-loosening bolt; 21. Through hole; 22. Threaded hole; 23. Sleeve hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] This application provides an assembly structure for connecting a motor and an exciter, mainly addressing the problems of difficult maintenance when the exciter is assembled inside the main motor, and the increased structural complexity and maintenance time when the exciter is mounted on a base outside the main motor. The following technical solution is provided, which will be discussed in conjunction with... Figure 1 - Figure 6 Please provide a detailed explanation:

[0026] An assembly structure for connecting a motor and an exciter includes a motor end cover 1, an annular fixing frame 2 on the front side of the motor end cover 1, a plurality of support columns 4 fixedly installed between the annular fixing frame 2 and the motor end cover 1, a ventilation cavity 9 pre-set inside the support column 4, the ventilation cavity 9 connecting the left side of the motor end cover 1 and the right side of the annular fixing frame 2, and a plurality of support rods 5 fixedly installed between the annular fixing frame 2 and the motor end cover 1 at a position offset from the support column 4.

[0027] Multiple equally spaced stator mounting brackets 8 are installed on the right side of the annular fixed bracket 2 away from the motor end cover 1. A stator retainer 6 is installed inside the stator mounting bracket 8, and an exciter stator 7 is installed on the stator retainer 6.

[0028] During assembly, the motor end cover 1 is fixed to the main motor. The main motor shaft extends through the motor end cover 1 to the position between the motor end cover 1 and the annular fixing frame 2. The exciter housing is first covered by the annular fixing frame 2 and then installed with the motor end cover 1. The exciter rotor is located inside the exciter stator 7. The rotor shaft also extends to the position between the annular fixing frame 2 and the motor end cover 1, so that the exciter rotor and the main motor shaft are close to each other. The existing coupling is used to fix them to each other to form a transmission connection.

[0029] Because a ventilation cavity 9 is provided in the support column 4 between the motor end cover 1 and the annular fixing frame 2, the support column 4 provides support for the assembly of the exciter and the main motor. At the same time, the heat dissipation airflow in the main motor can enter the exciter through the ventilation cavity 9, thereby connecting the main motor and the exciter. While the heat dissipation system on the main motor ventilates and cools the main motor, it also ventilates and cools the exciter, meeting the ventilation and heat dissipation requirements of the exciter. At the same time, the exciter and the main motor are installed synchronously, eliminating the need for a base for the exciter installation and the need for additional ventilation pipes, thus simplifying the structure.

[0030] In some embodiments, an annular baffle plate 10 is installed on the inner side of the annular fixing frame 2, and a bearing sealing kit 11 is installed on the inner side of the baffle plate 10.

[0031] When the exciter rotor is installed, the bearing sealing kit 11 contacts the rotor surface to perform a sliding seal. When used with the baffle plate 10, it can restrict the airflow in the motor to only interact with the airflow in the exciter through the ventilation cavity 9.

[0032] In some embodiments, an air guide pipe 12 is fixed on the front side of the annular fixing frame 2 at the ventilation cavity 9 position corresponding to the support column 4, and the air guide pipe 12 is obliquely disposed towards the exciter stator 7.

[0033] The air duct 12 can guide the airflow so that it blows directly onto the exciter stator 7 and the assembled exciter rotor, thereby ensuring the heat dissipation effect.

[0034] In some embodiments, a fixing plate 13 is installed on the outside of the stator retainer 6 corresponding to each stator mounting bracket 8 position. Multiple gaskets 14 are provided between the fixing plate 13 and the stator mounting bracket 8. Holes are opened on both ends of the fixing plate 13, the gaskets 14 and the corresponding stator mounting bracket 8, and fixing bolts 15 are installed in the holes. The fixing plate 13, the gaskets 14 and the stator mounting bracket 8 are fixed together by fixing bolts 15.

[0035] Considering the installation accuracy of the exciter and the main motor, the exciter rotor and the main motor shaft need to be aligned during assembly to avoid generating a large centrifugal force during rotation. Alignment relies on precisely set assembly fixing holes. The concentricity of the exciter stator 7 and the exciter rotor can be adjusted by adjusting the number of shims 14. Adding shims 14 on one side and removing shims 14 on the other side will cause the exciter stator 7 to move outward toward the side with fewer shims 14. By adjusting the number of shims 14 in each direction, the concentricity of the exciter stator 7 and the rotor can be adjusted.

[0036] In some embodiments, a stator mounting platform 3 is provided on the front side of the annular fixing frame 2 away from the motor end cover 1. The stator mounting frame 8 is fixed to the stator mounting platform 3. A column 16 is fixed on the annular fixing frame 2 at the position corresponding to the stator mounting platform 3. A sleeve hole 23 is opened on the stator mounting platform 3 at the position corresponding to the column 16. A movable threaded sleeve 17 is fitted inside the sleeve hole 23. The front end of the column 16 extends into the threaded sleeve 17 and is threadedly connected.

[0037] A limiting plate 18 is fixed to the outer rear end of the threaded sleeve 17, which abuts against the rear side of the stator mounting platform 3. A fixing ring plate 19 is fixed on the threaded sleeve 17 on the front side of the stator mounting platform 3. The threaded sleeve 17 is rotated and fixed to the stator mounting platform 3 through the limiting plate 18 and the fixing ring plate 19.

[0038] During exciter installation, the threaded sleeve 17 can be rotated. With the column 16 fixed to the annular fixing frame 2 and the threaded sleeve 17 and stator mounting platform 3 rotatably fixed, the rotation of the threaded sleeve 17 can drive the stator mounting platform 3 to move closer to or further away from the annular fixing frame 2, thereby adjusting the mutual distance. This can be flexibly adjusted according to the position of the exciter rotor.

[0039] In some embodiments, the threaded sleeve 17 has a through hole 21 at its front end, and the column 16 has a threaded hole 22 pre-set inside. An anti-loosening bolt 20 that extends into the threaded hole 22 and is threadedly connected to the through hole 21 is threaded through it.

[0040] The threaded sleeve 17 can be rotated to adjust the distance between the annular fixing frame 2 and the stator mounting platform 3. However, during use, machine vibration may cause the threaded sleeve 17 to rotate. Therefore, anti-loosening bolts 20 are installed to fix the threaded sleeve 17 tightly to prevent easy rotation. After the threaded sleeve 17 is adjusted, the anti-loosening bolts 20 are screwed in to clamp the column 16 and the threaded sleeve 17 to form a fixed structure, which can prevent the threaded sleeve 17 from rotating arbitrarily.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembly structure for connecting a motor and an exciter, comprising a motor end cover (1) and an exciter stator (7), characterized in that, The motor end cover (1) is provided with an annular fixing frame (2) on the front side. Multiple support columns (4) are fixedly installed between the annular fixing frame (2) and the motor end cover (1). A ventilation cavity (9) is preset in the support column (4). The ventilation cavity (9) connects the left side of the motor end cover (1) and the right side of the annular fixing frame (2). Multiple stator mounting frames (8) with equal spacing are installed on the right side of the annular fixing frame (2). A stator retainer (6) is installed inside the stator mounting frame (8). The exciter stator (7) is installed on the stator retainer (6).

2. The assembly structure for connecting a motor and an exciter according to claim 1, characterized in that, Multiple support rods (5) are also fixedly installed between the annular fixing frame (2) and the motor end cover (1) at a position offset from the support column (4).

3. The assembly structure for connecting a motor and an exciter according to claim 2, characterized in that, An annular baffle plate (10) is installed on the inner side of the annular fixing frame (2), and a bearing sealing kit (11) is installed on the inner side of the baffle plate (10).

4. The assembly structure for connecting a motor and an exciter according to claim 1, characterized in that, The annular fixed frame (2) has a duct (12) fixed at the ventilation cavity (9) of the support column (4) on the front side, and the duct (12) is set obliquely towards the exciter stator (7).

5. The assembly structure for connecting a motor and an exciter according to claim 1, characterized in that, A fixing plate (13) is installed on the outside of the stator retainer (6) corresponding to each stator mounting bracket (8). Multiple gaskets (14) are provided between the fixing plate (13) and the stator mounting bracket (8). Holes are opened on both ends of the fixing plate (13), the gaskets (14) and the corresponding stator mounting bracket (8), and fixing bolts (15) are installed in the holes. The fixing plate (13), the gaskets (14) and the stator mounting bracket (8) are fixed together by fixing bolts (15).

6. The assembly structure for connecting a motor and an exciter according to claim 5, characterized in that, A stator mounting platform (3) is provided on the front side of the annular fixing frame (2) away from the motor end cover (1). The stator mounting frame (8) is fixed to the stator mounting platform (3). A column (16) is fixed on the annular fixing frame (2) at the position corresponding to the stator mounting platform (3). A sleeve hole (23) is opened on the stator mounting platform (3) at the position corresponding to the column (16). A movable threaded sleeve (17) is fitted inside the sleeve hole (23). The front end of the column (16) extends into the threaded sleeve (17) and is threadedly connected.

7. The assembly structure for connecting a motor and an exciter according to claim 6, characterized in that, The threaded sleeve (17) is fixed with a limiting plate (18) on the outer side of the rear end, which abuts against the rear side of the stator mounting platform (3). A fixing ring plate (19) is fixed on the threaded sleeve (17) on the front side of the stator mounting platform (3). The threaded sleeve (17) is rotated and fixed to the stator mounting platform (3) through the limiting plate (18) and the fixing ring plate (19).

8. The assembly structure for connecting a motor and an exciter according to claim 7, characterized in that, The threaded sleeve (17) has a through hole (21) at the front end, and a threaded hole (22) is pre-set in the column (16). An anti-loosening bolt (20) that extends into the threaded hole (22) and is threadedly connected is passed through the through hole (21).

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