Excitation rectifying device for generator

Abstract

The utility model relates to the field of generators, in particular to an excitation rectifying device for a generator, which comprises a rectifier, a gear and a rotating shaft, the rectifier is clamped at the front end of an exciter rotor bracket, a mounting groove is arranged at the rear end of the exciter rotor bracket, the rotating shaft is arranged in the mounting groove, a support plate is arranged at one end of a connecting plate, and a mounting plate is welded at the upper end of the support plate. The beneficial effects of the utility model are that through the cooperation of the gear, the rack and the connecting plate, the distance between the two groups of mounting plates can be adjusted, the design of the screw rod and the pressing plate allows the rectifier arranged at the front end of the exciter rotor support to be quickly fixed and dismounted, the replacement process of the rectifier is simplified, and the replacement efficiency is improved. And the detachable rear cover plate is designed, so that the mechanism in the mounting groove is easy to overhaul and maintain.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to an excitation rectifier for a generator. Background Technology

[0002] Brushless excitation generators are increasingly widely used in generators due to their stable voltage. As one of the important components of the brushless excitation system, the rotating rectifier rectifies the three-phase AC power induced by the exciter rotor into DC power and supplies it to the main excitation winding of the generator. The rotating rectifier generally includes a rectifier module, protection devices and DC leads.

[0003] In related technologies, patent application number CN202123275084.4 discloses a generator excitation rectification structure, including an exciter rotor hub. A rectification module is placed on the bottom inner wall of the exciter rotor hub. Movable holes are opened on both sides of the exciter rotor hub, and movable rods are slidably connected in both movable holes. The ends of the two movable rods that are far apart from each other extend to the outside of the exciter rotor hub and are fixedly connected to a connecting plate. This allows for quick and convenient installation of the rectification module onto the exciter rotor hub, saving time and effort and space, thus meeting the needs of users. However, this device lacks a locking mechanism and only limits the clamping components through limit posts and limit grooves. During long-term use, the clamping plate is prone to detachment, causing damage to the rectification module. Therefore, we propose an excitation rectification device for generators.

[0004] The information disclosed in this background section is only for understanding the background technology of the inventive concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] The purpose of this utility model is to provide an excitation rectifier device for generators, so as to solve the problem that the device mentioned in the background art lacks a locking mechanism and only limits the clamping components by limiting the limit post and limiting groove. During long-term use, the clamping plate is prone to detachment, causing damage to the rectifier module.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An excitation rectifier for a generator includes a rectifier, an exciter rotor support, gears, and a shaft. The rectifier is mounted on the front end of the exciter rotor support. A mounting groove is formed at the center of the rear end of the exciter rotor support. A shaft is rotatably mounted at the center of the mounting groove. A gear is welded and fixed to the side of the shaft. Racks are symmetrically meshed at the upper and lower ends of the gear. A connecting plate is integrally formed on the side of the rack away from the gear. A limit plate is vertically welded to one end of the connecting plate, and the other end of the connecting plate passes through the exciter rotor. A support plate is welded onto the magnetometer rotor bracket. A mounting plate is welded and fixed onto the upper end of the support plate. A screw is rotatably mounted inside the mounting plate on the side near the magnetometer rotor bracket. One end of the screw penetrates the wall of the mounting plate. A throttle is mounted on the outer side of the mounting plate at the other end of the screw. A mounting block is threaded onto the side of the screw. A fixing plate is integrally formed at one end of the mounting block. A pressure plate is detachably mounted on the side of the fixing plate near the rectifier. A flexible buffer layer is glued onto the side of the pressure plate near the rectifier.

[0008] In some embodiments, four sets of connecting studs are symmetrically arranged on the upper end of the pressure plate. One end of each connecting stud penetrates through the fixing plate. The fixing plate has through holes at corresponding positions of the connecting studs. A fastening nut is fitted on the side of each connecting stud.

[0009] In some embodiments, two sets of fixing seats are vertically arranged at the upper end of the connecting plate, a guide rod is horizontally arranged inside the fixing seat, a guide seat is provided through the guide rod, and one end of the guide seat is connected and fixed to the mounting groove wall of the exciter rotor bracket.

[0010] In some embodiments, one end of the rotating shaft is rotatably mounted in the mounting groove via a rotating seat, the rotating seat is fixedly connected to the wall of the mounting groove, a handle is fixedly mounted on one end of the rotating shaft, and a rear cover plate is detachably mounted on the outside of the mounting groove.

[0011] In some embodiments, a threaded section is provided on one side of the rotating shaft on the outer side of the rear cover plate, and a fastening nut is provided on the threaded section.

[0012] In some embodiments, the side of the exciter rotor support has a through slot at the corresponding position of the connecting plate, and the rectifier is a rotary rectifier.

[0013] The beneficial effects of this utility model are:

[0014] The spacing between the two sets of mounting plates can be adjusted through the cooperation of gears, racks, and connecting plates. The design of the screw and pressure plate allows for quick fixing and disassembly of the rectifier located at the front end of the exciter rotor support, simplifying the rectifier replacement process. The removable rear cover design makes the mechanism in the mounting slot easy to inspect and maintain. The design of the guide rod, guide seat, and fixed seat ensures the linear movement of the connecting plate during movement, avoiding offset and thus improving the stability and reliability of the entire system. The side of the pressure plate near the rectifier has a flexible buffer layer, which can provide a certain degree of protection while fixing the rectifier, preventing damage caused by vibration or impact. The fastening nut is used to lock the fixing mechanism to prevent loosening during operation and ensure the safety of the structure. The entire device has a compact design, integrating components such as the rectifier and gear transmission system, effectively utilizing limited space. The brushless design reduces mechanical friction loss and improves energy conversion efficiency. The rotating rectifier can directly provide DC excitation current to the rotor, reducing losses during power transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an excitation rectifier for a generator proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of an excitation rectifier for a generator according to the present invention.

[0017] Figure 3 This is a schematic diagram of the regulating component structure of an excitation rectifier for a generator proposed in this utility model;

[0018] Figure 4 This is a rear view of an excitation rectifier for a generator according to the present invention.

[0019] In the diagram: 1 is the rectifier, 2 is the exciter rotor bracket, 3 is the mounting plate, 4 is the support plate, 5 is the mounting slot, 6 is the guide rod, 7 is the connecting plate, 8 is the rack, 9 is the gear, 10 is the rotating shaft, 11 is the limiting plate, 12 is the fixed seat, 13 is the guide seat, 14 is the screw, 15 is the mounting block, 16 is the fixed plate, 17 is the pressure plate, 18 is the connecting stud, 19 is the throttle, 20 is the fastening nut, 21 is the rear cover plate, and 22 is the through slot. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Reference Figure 1 , 2 3, 4, An excitation rectifier for a generator includes a rectifier 1, an exciter rotor support 2, a gear 9, and a rotating shaft 10. The rectifier 1 is installed at the front end of the exciter rotor support 2. An installation groove 5 is provided at the center of the rear end of the exciter rotor support 2. The rotating shaft 10 is rotatably mounted at the center of the installation groove 5. A gear 9 is welded and fixedly mounted on the side of the rotating shaft 10. A rack 8 is symmetrically meshed at the upper and lower ends of the gear 9. A connecting plate 7 is integrally formed on the side of the rack 8 away from the gear 9. A limit plate 11 is vertically welded to one end of the connecting plate 7. A support plate 4 is welded and fixed to the other end of the connecting plate 7 through the exciter rotor support 2. An mounting plate 3 is welded and fixedly mounted on the upper end of the support plate 4. The mounting plate 3 has a rotating shaft inside the side closer to the exciter rotor support 2. A screw 14 is provided, one end of which penetrates the wall of the mounting plate 3. A throttle 19 is installed on the outside of the mounting plate 3 at the other end of the screw 14. A mounting block 15 is threadedly engaged on the side of the screw 14. A fixing plate 16 is integrally formed on one end of the mounting block 15. A pressure plate 17 is detachably installed on the side of the fixing plate 16 near the rectifier 1. A flexible buffer layer is glued on the side of the pressure plate 17 near the rectifier 1. The distance between the two sets of mounting plates 3 can be adjusted by the gear 9, rack 8 and connecting plate 7. With the screw 14 and pressure plate 17 on the mounting plate 3, the rectifier 1 set at the front end of the exciter rotor bracket 2 can be fixed, which facilitates the disassembly and assembly of the rectifier 1. The fastening nut 20 can lock the fixing mechanism to prevent loosening.

[0024] In specific implementation of the embodiments of this utility model, such as Figure 1 ,3 As shown, four sets of connecting studs 18 are symmetrically arranged on the upper end of the pressure plate 17. One end of the connecting stud 18 passes through the fixing plate 16. The fixing plate 16 has through holes at the corresponding positions of the connecting studs 18. The side of the connecting stud 18 is fitted with a fastening nut 20. Two sets of fixing seats 12 are vertically arranged on the upper end of the connecting plate 7. A guide rod 6 is horizontally arranged inside the fixing seat 12. A guide seat 13 is passed through the guide rod 6. One end of the guide seat 13 is connected and fixed to the wall of the mounting groove 5 of the exciter rotor bracket 2. The guide rod 6, guide seat 13 and fixing seat 12 can ensure the stability of the connecting plate 7 during the movement and prevent the connecting plate 7 from deviating.

[0025] In specific implementation of the embodiments of this utility model, such as Figure 1 , 3 As shown, one end of the rotating shaft 10 is rotatably mounted in the mounting groove 5 via a rotating seat. The rotating seat is fixedly connected to the wall of the mounting groove 5. A handle 19 is fixedly mounted on one end of the rotating shaft 10. A rear cover plate 21 is detachably mounted on the outside of the mounting groove 5. A threaded section is provided on one side of the rotating shaft 10 on the outside of the rear cover plate 21. A fastening nut 20 is provided on the threaded section. The detachable rear cover plate 21 allows for the inspection and maintenance of the mechanism in the mounting groove 5, ensuring the normal operation of the clamping assembly.

[0026] In specific implementation of the embodiments of this utility model, such as Figure 1 , 2 As shown, the side of the exciter rotor support 2 has a through slot 22 at the corresponding position of the connecting plate 7. The rectifier 1 is a rotating rectifier. The rotating rectifier is installed at the front end of the exciter rotor support 2, near the main magnetic field winding, but does not interfere with the normal rotation of the rotor. The rotating rectifier is connected to the rotor coil through a conductive material. In this way, the DC current generated can be directly used to provide excitation current to the rotor. At the same time, the exciter is also installed on the same shaft and rotates coaxially with the main generator. The rear end of the exciter rotor support 2 is connected to the rotor shaft of the exciter through the connecting slot (not shown) on the side of the rear end cover.

[0027] In this embodiment, all components are general standard parts or components known to those skilled in the art. Their structures and connection principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the initial state, the exciter rotor support 2 is installed on the generator rotor, and the rotating rectifier is fixed at the front end of the exciter rotor support 2, close to the main magnetic field winding but without interfering with its normal rotation. The rectifier 1 is connected to the rotor coil through conductive material, ready to convert AC power into DC power to supply the rotor. When it is necessary to adjust or replace the rectifier, the operator can drive the gear 9 by rotating the handle 19 on the rotating shaft 10. The gear 9 drives the symmetrically meshing rack 8 to move, thereby pushing the connecting plate 7 to move inward or outward. The movement of the connecting plate 7 drives the support plate 4 and the mounting plate 3 to move together, changing the distance between the two sets of mounting plates 3. When the mounting plate 3 is moved to the appropriate position, the operator can use the screw 14 on the mounting plate 3 for fine adjustment. Rotating the handle on the screw 14 causes the screw 14 to drive the mounting block 15 to move along the thread direction. This pushes the fixing plate 16 closer to the rectifier 1. The pressure plate 17 on the fixing plate 16 contacts and presses the rectifier 1 through the flexible buffer layer, ensuring that it is firmly fixed on the exciter rotor support 2. The position of the mounting block 15 is locked with the fastening nut 20 to prevent it from loosening during operation. During the movement of the connecting plate 7, the guide rod 6, the guide seat 13 and the fixing seat 12 work together to ensure that the connecting plate 7 moves in a straight line and avoids deviation. One end of the guide seat 13 is connected and fixed to the wall of the mounting groove 5 of the exciter rotor support 2, providing stable support. If maintenance or repair of the internal mechanism is required, the rear cover plate 21 on the outside of the mounting groove 5 can be removed. A threaded section is provided on one side of the rotating shaft 10. The position of the rotating shaft 10 can be further locked by the matching fastening nut 20 to ensure the normal operation of the clamping assembly. When the generator is running, the AC power generated by the exciter is converted into DC power by the rotating rectifier. The DC power is directly supplied to the rotor coil to generate the required magnetic field. This magnetic field interacts with the rotating magnetic field in the stator to generate power output.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An excitation rectifier for a generator, comprising a rectifier (1), an exciter rotor support (2), a gear (9), and a shaft (10), characterized in that: A rectifier (1) is installed at the front end of the exciter rotor bracket (2). A mounting groove (5) is provided at the center of the rear end of the exciter rotor bracket (2). A rotating shaft (10) is rotatably installed at the center of the mounting groove (5). A gear (9) is welded and fixed to the side of the rotating shaft (10). A rack (8) is symmetrically meshed at the upper and lower ends of the gear (9). A connecting plate (7) is integrally formed on the side of the rack (8) away from the gear (9). A limit plate (11) is vertically welded to one end of the connecting plate (7). A support plate (4) is welded through the exciter rotor bracket (2) at the other end of the connecting plate (7). An mounting plate (3) is welded and fixed to the upper end of the rectifier (1). A screw (14) is rotatably mounted inside the mounting plate (3) on the side near the exciter rotor bracket (2). One end of the screw (14) penetrates the wall of the mounting plate (3). A throttle (19) is mounted on the outside of the mounting plate (3) at one end of the screw (14). An mounting block (15) is threaded on the side of the screw (14). A fixing plate (16) is integrally formed on one end of the mounting block (15). A pressure plate (17) is detachably mounted on the side of the fixing plate (1) near the rectifier (1). A flexible buffer layer is glued on the side of the pressure plate (17) near the rectifier (1).

2. The excitation rectifier for a generator according to claim 1, characterized in that, Four sets of connecting studs (18) are symmetrically arranged on the upper end of the pressure plate (17). One end of the connecting stud (18) passes through the fixing plate (16). The fixing plate (16) has through holes at the corresponding positions of the connecting studs (18). The side of the connecting stud (18) is fitted with a fastening nut (20).

3. The excitation rectifier for a generator according to claim 1, characterized in that, The upper end of the connecting plate (7) is vertically provided with two sets of fixing seats (12). The inner side of the fixing seat (12) is horizontally provided with a guide rod (6). A guide seat (13) is provided through the guide rod (6). One end of the guide seat (13) is connected and fixed to the wall of the mounting groove (5) of the exciter rotor bracket (2).

4. The excitation rectifier for a generator according to claim 1, characterized in that, One end of the rotating shaft (10) is rotatably mounted in the mounting groove (5) via a rotating seat. The rotating seat is fixedly connected to the wall of the mounting groove (5). A handle (19) is fixedly mounted on one end of the rotating shaft (10). A rear cover plate (21) is detachably mounted on the outside of the mounting groove (5).

5. The excitation rectifier for a generator according to claim 4, characterized in that, The rotating shaft (10) has a threaded section on one side of the rear cover plate (21) outside, and a fastening nut (20) is provided on the threaded section.

6. The excitation rectifier for a generator according to claim 1, characterized in that, The side of the exciter rotor support (2) has a through slot (22) at the corresponding position of the connecting plate (7), and the rectifier (1) is a rotary rectifier.

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