A support device for de-excitation resistors of brushless excitation synchronous machines

Abstract

The utility model discloses a kind of support device for brushless excitation synchronous motor deexcitation resistance, it is related to deexcitation resistance technical field, including bottom plate, the top outer wall of the bottom plate is connected with fixed base, the bottom plate is compatible with fixed base, the bottom plate top outer wall and the fixed base bottom outer wall are uniformly provided with connecting assembly, the connecting assembly is compatible with bottom plate, fixed base respectively.The utility model in this paper, resistance two ends are respectively sleeved on the fixed rod of adjacent two fixed bases, if resistance length is not enough or resistance length is too long, by moving fixed block to adjust spring compression or stretching adjustment fixed block position, the resistance installation of different length is facilitated, compared with traditional installation support, resistance length can be adjusted according to fixed block position, the resistance of different specifications is installed conveniently, in the resistance installation process, since fixed block position is adjustable, therefore, resistance is not bent to adapt fixed block position, resistance is not easy to be damaged due to bending.

Description

Technical Field

[0001] This utility model relates to the field of demagnetizing resistor technology, and in particular to a bracket device for a demagnetizing resistor in a brushless excitation synchronous motor. Background Technology

[0002] A demagnetizing resistor is a protective component used in the excitation circuit of a motor (especially a synchronous generator). Its main function is to quickly eliminate the residual magnetic field in the rotor when the motor stops, preventing overheating or damage to the equipment. The function and role of the demagnetizing resistor in the generator excitation circuit can be summarized in the following two points: First, it prevents rotor winding overvoltage. By limiting sudden changes in excitation current, the demagnetizing resistor effectively prevents overvoltage between rotor windings, ensuring that it does not exceed the allowable value, thereby protecting the winding insulation. Second, it accelerates magnetic field energy dissipation. The resistor converts the electromagnetic energy in the magnetic field into heat energy, shortening the demagnetizing time. This process helps to quickly reduce the rotor magnetic field strength, avoiding potential risks caused by the continuous presence of the magnetic field. The demagnetizing resistor needs to be installed using a bracket during operation.

[0003] However, the existing mounting brackets for demagnetizing resistors have certain shortcomings:

[0004] First, when installing resistors, the distance between the existing mounting brackets is fixed and cannot be adjusted. If the resistor is too long or too short, it needs to be bent or otherwise processed to meet the installation requirements. Such operations can damage the resistor to some extent and affect its normal operation.

[0005] Secondly, most existing resistor mounting brackets are integrally welded, which means they cannot be replaced when damaged. This makes maintenance and repair of the brackets quite troublesome and limits their use. Utility Model Content

[0006] The purpose of this application is to provide a support device for the demagnetizing resistor of a brushless excitation synchronous motor to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: a support device for a demagnetizing resistor of a brushless excitation synchronous motor, comprising a base plate, a fixed seat connected to the top outer wall of the base plate, the base plate being adapted to the fixed seat, connecting components being provided on both the top outer wall of the base plate and the bottom outer wall of the fixed seat, the connecting components being adapted to the base plate and the fixed seat respectively, the width of the fixed seat being smaller than the width of the base plate, a movable groove being provided on the outer wall of the fixed seat, the size of the movable groove being smaller than the side size of the fixed seat, fixing blocks being slidably installed at both ends of the inner wall of the movable groove, the fixing blocks being square in structure, fixing components being installed on the outer wall of the fixing blocks, the fixing components being adapted to the fixing blocks, adjusting springs being provided on both inner walls of the movable groove, the ends of the adjusting springs being connected to the outer walls of the fixing blocks, and dampers being provided on each adjusting spring, the dampers being adapted to the movable groove.

[0008] Preferably, the top outer wall and bottom outer wall of the fixed block are provided with limiting blocks, and the top inner wall and bottom inner wall of the moving groove are provided with limiting grooves, and the limiting blocks are slidably connected to the inner walls of the limiting grooves.

[0009] Preferably, the fixing component includes a fixing sleeve disposed on the outer wall of the fixing block, the outer wall of the fixing sleeve is provided with a fixing rod, the outer wall of the fixing rod is rotatably mounted with a locking ring by a thread, the outer wall of the fixing rod is provided with external threads distributed at equal intervals, and the inner wall of the locking ring is provided with an internal thread adapted to the fixing rod.

[0010] Preferably, the top of the limiting block on the top outer wall of the fixing block is provided with limiting holes distributed at equal intervals, and the top outer wall of the fixing seat is provided with positioning holes distributed at equal intervals on the side near the fixing block. The positioning holes penetrate the top of the fixing seat, and the diameter of the positioning holes is the same as the diameter of the limiting holes.

[0011] Preferably, a positioning pin is inserted into the inner wall of the positioning hole, the positioning pin is adapted to the positioning hole and the limiting hole respectively, and the length of the positioning pin is greater than the height of the limiting block.

[0012] Preferably, the connecting assembly includes connecting blocks disposed around the bottom outer wall of the fixing base, and connecting grooves are provided around the top outer wall of the base plate. The connecting grooves are adapted to the connecting blocks, and sealing gaskets are provided on the inner walls of the connecting grooves. The sealing gaskets are adapted to the connecting grooves and connecting blocks respectively.

[0013] Preferably, the outer wall of the connecting block and the inner wall of the connecting groove are provided with connecting holes, and the two ends of the outer walls on both sides of the base plate are provided with connecting pins, and the connecting pins are connected to the connecting holes by threads.

[0014] In summary, the technical effects and advantages of this utility model are as follows:

[0015] 1. In this utility model, during operation, the base plate is first welded to the designated position as needed. Then, the fixing base is connected to the base plate through the connecting assembly. After the connection is completed, the two ends of the resistor to be installed are respectively fitted onto the fixing rods of the two adjacent fixing bases. Then, the resistor is locked by the locking ring. During this process, if the resistor length is insufficient or excessive, the position of the fixing block can be adjusted by moving the fixing block to compress or stretch the adjusting spring, which facilitates the installation of resistors of different lengths. Compared with traditional mounting brackets, the position of the fixing block can be adjusted according to the resistor length, which facilitates the installation of resistors of different specifications. During the resistor installation process, since the position of the fixing block is adjustable, it is not necessary to bend the resistor to adapt to the position of the fixing block. The resistor is not easily damaged by bending, and the operation is more convenient. After the resistor is installed, the positioning pin is inserted into the corresponding positioning hole and limiting hole to fix the fixing block, thereby locking the fixing block and preventing the change of the adjusting spring force from affecting the stability of the resistor.

[0016] 2. In this utility model, when installing the bracket, it is only necessary to determine the position of the base plate and then weld it. Welding is more convenient and it is also easier to carry out rust prevention treatment on the base plate. Subsequently, the fixing seat and the base plate are connected by a fixed installation method, which makes installation more convenient and the fixing seat easier to disassemble for maintenance, making it more convenient to use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main body's external structure in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the fixed block structure in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the movable slot structure in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the connection component structure in an embodiment of this application.

[0022] In the diagram: 1. Base plate; 2. Fixed seat; 3. Moving groove; 4. Fixed block; 5. Adjusting spring; 6. Limiting block; 7. Limiting groove; 8. Fixed sleeve; 9. Fixed rod; 10. Locking ring; 11. Limiting hole; 12. Positioning hole; 13. Positioning pin; 14. Connecting block; 15. Connecting groove; 16. Sealing gasket; 17. Connecting pin. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: Reference Figure 1-4 The bracket device shown is for a demagnetizing resistor of a brushless excitation synchronous motor. It includes a base plate 1, with a fixed seat 2 connected to the top outer wall of the base plate 1. The base plate 1 and the fixed seat 2 are adapted to each other. Connecting components are provided on the top outer wall of the base plate 1 and the bottom outer wall of the fixed seat 2, respectively, and are adapted to the base plate 1 and the fixed seat 2. The width of the fixed seat 2 is smaller than the width of the base plate 1. A movable groove 3 is formed on the outer wall of the fixed seat 2, the size of which is smaller than the side dimension of the fixed seat 2. Fixing blocks 4 are slidably installed at both ends of the inner wall of the movable groove 3. The fixing blocks 4 have a square structure, and the outer wall of the fixing blocks 4 is fitted with... The device is equipped with a fixing component that is compatible with the fixing block 4. Adjusting springs 5 ​​are provided on both sides of the inner wall of the moving groove 3. The ends of the adjusting springs 5 ​​are connected to the outer wall of the fixing block 4. Each adjusting spring 5 is equipped with a damper that is compatible with it. The damper is compatible with the moving groove 3. The fixing component includes a fixing sleeve 8 set on the outer wall of the fixing block 4. Each fixing sleeve 8 is equipped with a fixing rod 9 on its outer wall. A locking ring 10 is installed on the outer wall of the fixing rod 9 by rotating it through a thread. The outer wall of the fixing rod 9 is provided with external threads that are evenly distributed. The inner wall of the locking ring 10 is provided with an internal thread that is compatible with the fixing rod 9.

[0025] With the above structure: During operation, the base plate 1 is first welded to the designated position as needed. Then, the fixing seat 2 is connected to the base plate 1 through the connecting assembly. After the connection is completed, the two ends of the resistor to be installed are respectively placed on the fixing rods 9 of the two adjacent fixing seats 2. Then, the resistor is locked by the locking ring 10. During this process, if the resistor length is insufficient or excessive, the position of the fixing block 4 can be adjusted by moving the fixing block 4 to compress or stretch the adjusting spring 5, which facilitates the installation of resistors of different lengths. Compared with traditional mounting brackets, the position of the fixing block 4 can be adjusted according to the resistor length, which facilitates the installation of resistors of different specifications. During the resistor installation process, since the position of the fixing block 4 is adjustable, it is not necessary to bend the resistor to fit the position of the fixing block 4. The resistor is not easily damaged by bending, and the operation is more convenient.

[0026] like Figure 4As shown, the top and bottom outer walls of the fixed block 4 are provided with limiting blocks 6, and the top and bottom inner walls of the moving groove 3 are provided with limiting grooves 7. The limiting blocks 6 are slidably connected to the inner walls of the limiting grooves 7. The top of the limiting blocks 6 on the top outer wall of the fixed block 4 is provided with limiting holes 11 distributed at equal intervals. The top outer wall of the fixed seat 2 is provided with positioning holes 12 distributed at equal intervals on the side near the fixed block 4. The positioning holes 12 penetrate the top of the fixed seat 2. The diameter of the positioning holes 12 is the same as the diameter of the limiting holes 11. The positioning pins 13 are inserted into the inner wall of the positioning holes 12. The positioning pins 13 are adapted to the positioning holes 12 and the limiting holes 11 respectively. The length of the positioning pins 13 is greater than the height of the limiting blocks 6. After the resistor is installed, the positioning pins 13 are inserted into the corresponding positioning holes 12 and limiting holes 11 to fix the fixed block 4, thereby locking the fixed block 4 and preventing the change of the elastic force of the adjusting spring 5 from affecting the stability of the resistor.

[0027] like Figure 4 As shown, the connecting assembly includes connecting blocks 14 disposed around the bottom outer wall of the fixed base 2. Connecting grooves 15 are provided around the top outer wall of the base plate 1. The connecting grooves 15 are adapted to the connecting blocks 14. A sealing gasket 16 is provided on the inner wall of the connecting groove 15. The sealing gasket 16 is adapted to the connecting groove 15 and the connecting block 14 respectively. Connecting holes are provided on the outer wall of the connecting block 14 and the inner wall of the connecting groove 15. Connecting pins 17 are provided at both ends of the outer walls on both sides of the base plate 1. The connecting pins 17 are connected to the connecting holes by threads. The fixed base 2 and the base plate 1 are connected by the mutual cooperation of the connecting blocks 14 and the connecting grooves 15. When installing the bracket, it is only necessary to determine the position of the base plate 1 and then weld it. Welding is more convenient and it is also easier to carry out rust prevention treatment on the base plate 1. Subsequently, the fixed base 2 and the base plate 1 are connected by a fixed installation method, which is more convenient for installation and easier for the fixed base 2 to be disassembled for maintenance, making it more convenient to use.

[0028] The working principle of this practical application is as follows:

[0029] During operation, the base plate 1 is first welded to the designated position as needed. Then, the fixing seat 2 is connected to the base plate 1 through the connecting assembly. After the connection is completed, the two ends of the resistor to be installed are respectively placed on the fixing rods 9 of the two adjacent fixing seats 2. Then, the resistor is locked by the locking ring 10. During this process, if the resistor length is insufficient or excessive, the position of the fixing block 4 can be adjusted by moving the fixing block 4 to compress or stretch the adjusting spring 5, which facilitates the installation of resistors of different lengths. Compared with traditional mounting brackets, the position of the fixing block 4 can be adjusted according to the resistor length, which facilitates the installation of resistors of different specifications. During the resistor installation process, since the position of the fixing block 4 is adjustable, it is not necessary to bend the resistor to adapt to the position of the fixing block 4. The resistor is not easily damaged by bending, and the operation is more convenient. After the resistor is installed, the positioning pin 13 is inserted into the corresponding positioning hole 12 and limiting hole 11 to fix the fixing block 4, thereby locking the fixing block 4 and preventing the change of the elasticity of the adjusting spring 5 from affecting the stability of the resistor.

[0030] During bracket installation, it is only necessary to determine the position of the base plate 1 and then weld it. Welding is more convenient and it is also easier to perform rust prevention treatment on the base plate 1. Subsequently, the fixing seat 2 is connected to the base plate 1 through a fixed installation method, which makes installation more convenient and allows the fixing seat 2 to be disassembled for maintenance, making it more convenient to use.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support device for a demagnetizing resistor in a brushless excitation synchronous motor, comprising a base plate (1), characterized in that: The top outer wall of the base plate (1) is connected to a fixed seat (2). The base plate (1) and the fixed seat (2) are adapted to each other. The top outer wall of the base plate (1) and the bottom outer wall of the fixed seat (2) are both provided with connecting components. The connecting components are adapted to the base plate (1) and the fixed seat (2) respectively. The width of the fixed seat (2) is smaller than the width of the base plate (1). The outer wall of the fixed seat (2) is provided with a moving groove (3). The size of the moving groove (3) is smaller than the side size of the fixed seat (2). The two ends of the inner wall of the moving groove (3) are slidably installed with fixed blocks (4). The fixed blocks (4) are square structures. The outer wall of the fixed blocks (4) is equipped with fixed components. The fixed components are adapted to the fixed blocks (4). The inner walls on both sides of the moving groove (3) are provided with adjusting springs (5). The ends of the adjusting springs (5) are connected to the outer wall of the fixed blocks (4). The adjusting springs (5) are all provided with dampers adapted to them. The dampers are adapted to the moving groove (3).

2. The bracket device for the demagnetizing resistor of a brushless excitation synchronous motor according to claim 1, characterized in that: The top outer wall and bottom outer wall of the fixed block (4) are provided with limiting blocks (6), and the top inner wall and bottom inner wall of the moving groove (3) are provided with limiting grooves (7). The limiting blocks (6) and the inner walls of the limiting grooves (7) are slidably connected.

3. The bracket device for the demagnetizing resistor of a brushless excitation synchronous motor according to claim 1, characterized in that: The fixing component includes a fixing sleeve (8) disposed on the outer wall of the fixing block (4). The outer wall of the fixing sleeve (8) is provided with a fixing rod (9). The outer wall of the fixing rod (9) is fitted with a locking ring (10) by thread rotation. The outer wall of the fixing rod (9) is provided with external threads distributed at equal intervals. The inner wall of the locking ring (10) is provided with an internal thread that matches the fixing rod (9).

4. A bracket device for a demagnetizing resistor of a brushless excitation synchronous motor according to claim 2, characterized in that: The top of the limiting block (6) on the top outer wall of the fixing block (4) is provided with equal-distance limiting holes (11), and the top outer wall of the fixing seat (2) is provided with equal-distance positioning holes (12) on the side close to the fixing block (4). The positioning holes (12) penetrate the top of the fixing seat (2), and the diameter of the positioning holes (12) is the same as the diameter of the limiting holes (11).

5. A bracket device for a demagnetizing resistor of a brushless excitation synchronous motor according to claim 4, characterized in that: A positioning pin (13) is inserted into the inner wall of the positioning hole (12). The positioning pin (13) is adapted to the positioning hole (12) and the limiting hole (11) respectively. The length of the positioning pin (13) is greater than the height of the limiting block (6).

6. A bracket device for a demagnetizing resistor of a brushless excitation synchronous motor according to claim 1, characterized in that: The connecting assembly includes connecting blocks (14) disposed around the bottom outer wall of the fixed base (2). Connecting grooves (15) are provided around the top outer wall of the base plate (1). The connecting grooves (15) are adapted to the connecting blocks (14). A sealing gasket (16) is provided on the inner wall of the connecting grooves (15). The sealing gasket (16) is adapted to the connecting grooves (15) and the connecting blocks (14) respectively.

7. A bracket device for a demagnetizing resistor of a brushless excitation synchronous motor according to claim 6, characterized in that: The outer wall of the connecting block (14) and the inner wall of the connecting groove (15) are provided with connecting holes. Both ends of the outer walls on both sides of the base plate (1) are provided with connecting pins (17). The connecting pins (17) and the connecting holes are connected by threads.

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