Excitation improvement device of old hydro-generator

Abstract

The utility model relates to the technical field of hydro-generators, and discloses an excitation improvement device of an old hydro-generator, which comprises a generator shell, a generator spindle is movably mounted in the generator shell, and an extension shaft is fixedly mounted on the outer surface of the generator spindle. Compared with a traditional device, through cooperation of the conductive block, the fixing support and the carbon brush, abrasion between the slip ring and the carbon brush is reduced, the current transmission efficiency is remarkably improved through introduction of the conductive block, the conductive block is made of high-quality conductive materials, the contact area between the slip ring and the carbon brush is increased, and the service life of the slip ring and the carbon brush is prolonged. The loss in the current transmission process is effectively reduced, meanwhile, the stability of the contact surface is optimized through the design of the conductive block, the current fluctuation caused by poor contact or vibration is avoided, and the stability of the magnetic field of the generator and the high quality of the output current are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, and more specifically, to an excitation improvement device for old water turbine generators. Background Art

[0002] An excitation improvement device for old hydro-turbine generators is designed to improve the performance and stability of the generator. The device is cleverly designed, including an extension shaft connected to the main shaft of the generator and an exciter part. The exciter has a delicate structure, including a fixed housing and a rotating drum sleeved on the extension shaft, on which an exciter armature is arranged. The armature winding is connected to the excitation winding of the generator rotor through a rectifier to ensure stable current transmission. The excitation system of existing small hydro-turbine generators, whether it is reactance shunt, secondary winding rectification, thyristor excitation or exciter excitation, relies on a common structure-carbon brushes and slip rings. Carbon brushes and slip rings transmit excitation current through dynamic contact to excite the generator magnetic field. However, this contact method is prone to wear and spark generation. If improperly maintained, wear will increase and sparks will occur frequently, which will cause excitation system failure and cause the generator to shut down. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides an excitation improvement device for an old hydro-generator, which has the advantage of reducing the wear between the slip ring and the carbon brush.

[0004] To achieve the above object, the utility model provides the following technical solutions: an excitation improvement device for an old hydro-turbine generator, comprising a generator housing, a generator main shaft is movably mounted inside the generator housing, an extension shaft is fixedly mounted on the outer surface of the generator main shaft, an armature winding and a rotor excitation winding of an exciter are fixedly mounted on the outer surface of the extension shaft, and the rotor excitation winding is on the right side of the armature winding of the exciter;

[0005] A fixing bracket is fixedly installed on the inner top of the generator housing, a carbon brush is fixedly installed on one end of the fixing bracket, a slide groove is opened inside the carbon brush, a slip ring is fixedly installed on one end of the extension shaft, a conductive block is fixedly installed on the outer surface of the slip ring, and the conductive block moves inside the slide groove, and a rectifier is fixedly installed on the outer surface of the generator housing.

[0006] As a preferred technical solution of the utility model,

[0007] A support block is fixedly installed on the outer surface of the generator housing, a mounting plate is fixedly installed on the bottom of the support block, and the mounting plate is movably installed inside the fixed plate, a connecting block 1 is fixedly installed on one end of the mounting plate, a connecting block 2 is fixedly installed on one end of the connecting block 1, and a limiting block is fixedly installed on one end of the connecting block 2;

[0008] A spring is fixedly installed inside the fixing plate, a limiting hole is provided inside the fixing plate, and a limiting block is movably installed inside the limiting hole.

[0009] As a preferred technical solution of the utility model, the support block presents two shapes of the same size on the outer surface of the generator housing, and the inside of the support block presents a U-shape.

[0010] As a preferred technical solution of the utility model, there are two groups of the limit blocks and the connecting block 2, and the two groups are located at one end of the connecting block 1.

[0011] As a preferred technical solution of the utility model, a fixing block is fixedly installed on the outer surface of the support block, and a threaded hole is opened inside the fixing block.

[0012] As a preferred technical solution of the utility model, the spring presents two shapes of the same size inside the fixed plate, and the spring is made of stainless steel.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. Compared with the traditional device, the utility model reduces the wear between the slip ring and the carbon brush through the cooperation between the conductive block, the fixed bracket and the carbon brush, and significantly improves the current transmission efficiency through the introduction of the conductive block. The conductive block is made of high-quality conductive material, which increases the contact area between the slip ring and the carbon brush, and effectively reduces the loss in the current transmission process. At the same time, the design of the conductive block optimizes the stability of the contact surface, avoids current fluctuations caused by poor contact or vibration, and ensures the stability of the generator magnetic field and the high quality of the output current. The addition of the conductive block also reduces the friction, wear and sparking between the slip ring and the carbon brush, prolongs the service life of the equipment, and reduces the maintenance cost. More importantly, the durability and reliability of the conductive block provide solid support for the entire excitation system, reduce the occurrence of system failures, reduce downtime and maintenance frequency, thereby improving the stability and reliability of the entire power system.

[0015] 2. Compared with the traditional device, the utility model facilitates the rapid disassembly and installation of the generator casing through the cooperation between the limit block, the connecting block 2 and the spring, shortens the maintenance time of the generator casing, reduces downtime losses, reduces maintenance costs, and improves power generation efficiency. When the generator casing needs to be upgraded or the equipment needs to be replaced, the convenient disassembly and installation process makes the work more flexible and efficient, ensuring the stable operation of the power system. At the same time, the simple operation also reduces the operating risks and ensures the safety of maintenance personnel. In general, the design that is easy to disassemble and install can greatly improve work efficiency, reduce unnecessary downtime, and provide a strong guarantee for the continuous and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front three-dimensional appearance structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional appearance structure of the back of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the generator housing of the utility model;

[0019] Figure 4 This is a schematic diagram of the carbon brush structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the spring structure of the utility model.

[0021] In the figure: 1. generator housing; 2. generator main shaft; 3. rectifier; 4. support block; 5. fixing block; 6. spring; 7. fixing plate; 8. mounting plate; 9. connecting block 1; 10. connecting block 2; 11. limiting block; 12. threaded hole; 13. extension shaft; 14. armature winding of exciter; 15. rotor excitation winding; 16. slip ring; 17. conductive block; 18. fixing bracket; 19. carbon brush; 20. slide groove; 21. limiting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, the utility model provides an excitation improvement device for an old hydro-turbine generator, comprising a generator housing 1, a generator main shaft 2 is movably mounted inside the generator housing 1, an extension shaft 13 is fixedly mounted on the outer surface of the generator main shaft 2, an armature winding 14 of an exciter and a rotor excitation winding 15 are fixedly mounted on the outer surface of the extension shaft 13, and the rotor excitation winding 15 is on the right side of the armature winding 14 of the exciter;

[0024] A fixing bracket 18 is fixedly installed on the top of the inner part of the generator housing 1, a carbon brush 19 is fixedly installed on one end of the fixing bracket 18, a slide groove 20 is provided inside the carbon brush 19, a slip ring 16 is fixedly installed on one end of the extension shaft 13, a conductive block 17 is fixedly installed on the outer surface of the slip ring 16, and the conductive block 17 moves inside the slide groove 20, and a rectifier 3 is fixedly installed on the outer surface of the generator housing 1.

[0025] The staff turns on the generator main shaft 2, and drives the rectifier 3 to rotate through the generator main shaft 2, and then drives the extension shaft 13 and the armature of the exciter to rotate through the rectifier 3. At this time, the rotor excitation winding 15 provides voltage to the armature winding 14 of the exciter of the generator housing 1 through the rectifier 3, so that it generates a magnetic field, and then drives the slip ring 16 to rotate through the extension shaft 13, and drives the conductive block 17 to rotate inside the carbon brush 19 through the slip ring 16, and supports the carbon brush 19 through the fixed bracket 18, and then the conductive block 17 slides inside the slide groove 20, thereby completing hydropower generation through the generator housing 1.

[0026] The rectifier 3 is driven to rotate by the generator main shaft 2, and the extension shaft 13 and the armature of the exciter are driven to rotate by the rectifier 3. At this time, the rotor excitation winding 15 provides voltage to the armature winding 14 of the exciter of the generator housing 1 through the rectifier 3, so that it generates a magnetic field, and the slip ring 16 is driven to rotate by the extension shaft 13, and the conductive block 17 is driven to rotate inside the carbon brush 19 by the slip ring 16. The carbon brush 19 is supported by the fixed bracket 18, and the conductive block 17 slides inside the slide groove 20. Compared with the traditional device, the device reduces the wear between the slip ring and the carbon brush through the cooperation between the conductive block 17, the fixed bracket 18 and the carbon brush 19, and significantly improves the electric The current transmission efficiency is improved. The conductive block is made of high-quality conductive material, which increases the contact area between the slip ring and the carbon brush, effectively reducing the loss in the current transmission process. At the same time, the design of the conductive block 17 optimizes the stability of the contact surface, avoids current fluctuations caused by poor contact or vibration, and ensures the stability of the generator magnetic field and the high quality of the output current. The addition of the conductive block 17 also reduces the friction, wear and sparking between the slip ring and the carbon brush, extends the service life of the equipment, and reduces maintenance costs. More importantly, the durability and reliability of the conductive block provide solid support for the entire excitation system, reduce the occurrence of system failures, reduce downtime and maintenance frequency, thereby improving the stability and reliability of the entire power system.

[0027] The outer surface of the generator housing 1 is fixedly mounted with a support block 4, the bottom of the support block 4 is fixedly mounted with a mounting plate 8, and the mounting plate 8 is movably mounted inside the fixed plate 7, one end of the mounting plate 8 is fixedly mounted with a connecting block 1 9, one end of the connecting block 1 9 is fixedly mounted with a connecting block 2 10, and one end of the connecting block 2 10 is fixedly mounted with a limiting block 11;

[0028] The spring 6 is fixedly installed inside the fixing plate 7 , a limiting hole 21 is provided inside the fixing plate 7 , and a limiting block 11 is movably installed inside the limiting hole 21 .

[0029] The staff needs to perform maintenance and inspection on the generator housing 1 that has been used for a long time. By holding the mounting plate 8 and squeezing the spring 6 inside the fixing plate 7, the connecting block 2 10 is slowly disengaged from the inside of the limiting hole 21. Then, through the cooperation between the mounting plate 8 and the support block 4, the generator housing 1 is slowly moved. The generator housing 1 is now maintained and inspected. After the inspection is completed, the generator housing 1 needs to be installed by placing it into the fixing plate 7, squeezing the spring 6 through the mounting plate 8, and driving the connecting block 2 10 to slowly approach the inside of the fixing plate 7 through the mounting plate 8. Then, the connecting block 1 9 is slowly driven to approach the fixing plate 7 through the connecting block 2 10, and then the limiting block 11 is slowly driven into the inside of the limiting hole 21 through the connecting blocks 2 10 and the connecting blocks 1 9, thereby completing the disassembly and installation of the generator housing 1.

[0030] It is necessary to perform maintenance and inspection on the generator housing 1 that has been used for a long time. By holding the mounting plate 8 and squeezing the spring 6 inside the fixing plate 7, the connecting block 2 10 is slowly disengaged from the inside of the limiting hole 21. Then, through the cooperation between the mounting plate 8 and the supporting block 4, the generator housing 1 is slowly moved. Now the generator housing 1 is maintained and inspected. Compared with the traditional device, the device facilitates the rapid disassembly and installation of the generator housing 1 through the cooperation between the limiting block 11, the connecting block 2 10 and the spring 6, shortens the maintenance time of the generator housing 1, reduces the downtime loss, reduces the maintenance cost, and improves the power generation efficiency. When the generator housing 1 needs to be upgraded or the equipment needs to be replaced, the convenient disassembly and installation process makes the work more flexible and efficient, ensuring the stable operation of the power system. At the same time, the simple operation also reduces the operation risk and ensures the safety of the maintenance personnel. In general, the design that is easy to disassemble and install can greatly improve the work efficiency, reduce unnecessary downtime, and provide a strong guarantee for the continuous and stable operation of the power system.

[0031] The support block 4 presents two shapes of the same size on the outer surface of the generator housing 1, and the inside of the support block 4 presents a U-shape.

[0032] Since the interior of the support block 4 is in a U-shape, the support of the generator housing 1 by the support block 4 can effectively disperse and transfer the load, reduce the vibration and noise during the operation of the generator housing 1, thereby improving the operating efficiency of the generator housing 1. The sturdy support block 4 also helps to reduce faults of the generator caused by vibration, thereby improving the safety of the entire power generation system.

[0033] There are two groups of the limit blocks 11 and the connecting blocks 10, and two groups are located at one end of the connecting block 1 9.

[0034] Since there are two sets of limit blocks 11 and connecting blocks 10 at one end of connecting block 1 9, the cooperation between the limit blocks 11 and connecting blocks 10 facilitates the maintenance and installation of the generator more stably, thereby improving the installation efficiency and maintenance efficiency of the generator.

[0035] A fixing block 5 is fixedly mounted on the outer surface of the supporting block 4 , and a threaded hole 12 is provided inside the fixing block 5 .

[0036] By screwing the bolts into the threaded holes 12 and fixing the support block 4 and the fixing block 5 via the bolts, the stability of the support block 4 supporting the generator housing 1 is ensured, the stability of the generator during operation is improved, and the shaking is reduced.

[0037] The spring 6 presents two shapes of the same size inside the fixing plate 7, and the spring 6 is made of stainless steel.

[0038] Since the spring 6 presents two shapes of the same size inside the fixing plate 7 and the spring 6 is made of stainless steel, the spring 6 made of stainless steel is more stable when the generator is disassembled and installed.

[0039] The working principle and use process of this utility model:

[0040] The staff turns on the generator main shaft 2, and drives the rectifier 3 to rotate through the generator main shaft 2, and then drives the extension shaft 13 and the armature of the exciter to rotate through the rectifier 3. At this time, the rotor excitation winding 15 provides voltage to the armature winding 14 of the exciter of the generator housing 1 through the rectifier 3, so that it generates a magnetic field, and then drives the slip ring 16 to rotate through the extension shaft 13, and drives the conductive block 17 to rotate inside the carbon brush 19 through the slip ring 16, and supports the carbon brush 19 through the fixed bracket 18, and then the conductive block 17 slides inside the slide groove 20, thereby completing hydropower generation through the generator housing 1.

[0041] The staff needs to perform maintenance and inspection on the generator housing 1 that has been used for a long time. By holding the mounting plate 8 and squeezing the spring 6 inside the fixing plate 7, the connecting block 2 10 is slowly disengaged from the inside of the limiting hole 21. Then, through the cooperation between the mounting plate 8 and the support block 4, the generator housing 1 is slowly moved. The generator housing 1 is now maintained and inspected. After the inspection is completed, the generator housing 1 needs to be installed by placing it into the fixing plate 7, squeezing the spring 6 through the mounting plate 8, and driving the connecting block 2 10 to slowly approach the inside of the fixing plate 7 through the mounting plate 8. Then, the connecting block 1 9 is slowly driven to approach the fixing plate 7 through the connecting block 2 10, and then the limiting block 11 is slowly driven into the inside of the limiting hole 21 through the connecting blocks 2 10 and the connecting blocks 1 9, thereby completing the disassembly and installation of the generator housing 1.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An excitation improvement device for an old hydro-turbine generator, comprising a generator housing (1), characterized in that: A generator main shaft (2) is movably mounted inside the generator housing (1), an extension shaft (13) is fixedly mounted on the outer surface of the generator main shaft (2), an armature winding (14) of an exciter and a rotor excitation winding (15) are fixedly mounted on the outer surface of the extension shaft (13), and the rotor excitation winding (15) is located on the right side of the armature winding (14) of the exciter; A fixing bracket (18) is fixedly mounted on the top of the generator housing (1), a carbon brush (19) is fixedly mounted on one end of the fixing bracket (18), a slide groove (20) is provided inside the carbon brush (19), a slip ring (16) is fixedly mounted on one end of the extension shaft (13), a conductive block (17) is fixedly mounted on the outer surface of the slip ring (16), and the conductive block (17) moves inside the slide groove (20), and a rectifier (3) is fixedly mounted on the outer surface of the generator housing (1).

2. The excitation improvement device for an old hydro-generator according to claim 1 is characterized in that: A support block (4) is fixedly mounted on the outer surface of the generator housing (1); a mounting plate (8) is fixedly mounted on the bottom of the support block (4); and the mounting plate (8) is movably mounted inside the fixing plate (7); a connecting block 1 (9) is fixedly mounted on one end of the mounting plate (8); a connecting block 2 (10) is fixedly mounted on one end of the connecting block 1 (9); and a limiting block (11) is fixedly mounted on one end of the connecting block 2 (10); A spring (6) is fixedly installed inside the fixing plate (7), a limiting hole (21) is provided inside the fixing plate (7), and a limiting block (11) is movably installed inside the limiting hole (21).

3. The excitation improvement device for an old hydro-generator according to claim 2 is characterized in that: The support block (4) presents two shapes of the same size on the outer surface of the generator housing (1), and the inside of the support block (4) presents a U-shape.

4. The excitation improvement device for an old hydro-generator according to claim 2 is characterized in that: There are two groups of the limit block (11) and the second connecting block (10), and two groups are located at one end of the first connecting block (9).

5. The excitation improvement device for an old hydro-generator according to claim 2 is characterized in that: A fixing block (5) is fixedly mounted on the outer surface of the support block (4), and a threaded hole (12) is provided inside the fixing block (5).

6. The excitation improvement device for an old hydro-generator according to claim 2 is characterized in that: The spring (6) presents two shapes of the same size inside the fixing plate (7), and the spring (6) is made of stainless steel.

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