Tool and method for backwashing cooling water of generator rotor

Abstract

The invention relates to the technical field of generator rotor maintenance, in particular to a generator rotor cooling water backwashing tool and method.The generator rotor cooling water backwashing tool comprises a plugging mechanism arranged in a center hole of a generator rotor, and a washing channel used for being communicated with any branch of generator cooling water is arranged in the plugging mechanism; the flushing channel is communicated with a butt joint area and a discharge area, the butt joint area is arranged on the surface of the outer wall of the plugging mechanism, and the discharge area is arranged at the end of the plugging mechanism, when the device is used for backwashing with cooling water, one-by-one disassembly is not needed, the requirements of time saving, labor saving and high efficiency can be met, the operation time is shortened, the working efficiency is improved, and the cost is reduced. 90% of workload can be saved, and secondary defects are completely eradicated.

Description

Technical Field

[0001] The invention relates to the technical field of generator rotor maintenance, in particular to a generator rotor cooling water backwashing tool and method. Background Art

[0002] The cooling water of the TBM160-2 generator rotor enters from the center hole of the generator rotor shaft. Figure 2 , divided into 8 branches and enter the top coil of the rotor, and then enter the return pipe inside the main shaft from the coil on the main shaft side. This is the working state of the generator cooling water.

[0003] Reference Figure 3 During maintenance, it is necessary to backwash these branch cooling water pipes with reverse water. The specific process is: disassemble the 16 branch joints, backwash them one by one in groups, block all other branches that do not need to participate, and so on, until all flushing is completed. The workload is huge and it is easy to cause secondary defects.

[0004] To this end, the present invention proposes a generator rotor cooling water backwashing tool and method, which solves the problem of completing branch backwashing work without disassembling water joints, can save 90% of the workload and prevent the occurrence of secondary defects. Summary of the invention

[0005] In view of the above or existing problems in the prior art that when backwashing the rotor cooling water circuit, each branch needs to be disassembled, flushed one by one, and other branches are blocked, the workload is large, and it is easy to cause joint leakage during reinstallation and reduced coil insulation capacity, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a generator rotor cooling water backwashing tool and method.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a generator rotor cooling water backwashing tool, comprising:

[0008] A plugging mechanism is arranged at the central hole of the generator rotor, and a flushing channel for connecting any branch of the generator cooling water is arranged inside the plugging mechanism.

[0009] As a preferred solution of the generator rotor cooling water backwashing tool of the present invention, the flushing channel is connected to a docking area and a discharge area.

[0010] As a preferred solution of the generator rotor cooling water backwashing tool of the present invention, the docking area is arranged on the outer wall surface of the sealing mechanism, and the discharge area is arranged at the end of the sealing mechanism.

[0011] As a preferred solution of the generator rotor cooling water backwashing tool of the present invention, the diameter of one end where the discharge area is located is smaller than the diameter of one end of the sealing mechanism away from the discharge area.

[0012] As a preferred solution of the generator rotor cooling water backwashing tool of the present invention, wherein: the docking area is a hole-shaped structure;

[0013] The discharge area is a hole-shaped structure.

[0014] The beneficial effects of the generator rotor cooling water backwashing tool of the present invention are as follows: the device can be used for cooling water backwashing without disassembling each unit one by one, which can meet the needs of time saving, labor saving and high efficiency, reduce operation time, improve work efficiency, save 90% of the workload, and prevent the occurrence of secondary defects.

[0015] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for backwashing cooling water of a generator rotor, comprising:

[0016] A sealing mechanism is provided in the central hole of the generator rotor;

[0017] A flushing channel is provided in the blocking mechanism;

[0018] Connect the flushing channel to any branch of the generator cooling water;

[0019] Change the flow direction of generator cooling water for reverse flushing.

[0020] As a preferred solution of the generator rotor cooling water backwashing method of the present invention, the blocking mechanism is slid to connect the flushing channel to different cooling water branches, thereby changing the flushing branch.

[0021] As a preferred solution of the generator rotor cooling water backwashing method of the present invention, the blocking mechanism is capable of blocking the remaining cooling water branches that are not aligned with the flushing channel.

[0022] As a preferred solution of the generator rotor cooling water backwashing method of the present invention, during backwashing, the branches far from the water outlet of the flushing channel are flushed in sequence to the branches close to the water outlet of the flushing channel.

[0023] As a preferred solution of the generator rotor cooling water backwashing method of the present invention, the outer wall size of the sealing mechanism matches the inner wall size of the generator rotor center hole.

[0024] The beneficial effects of the generator rotor cooling water backwashing method of the present invention are as follows: using this method for cooling water backwashing does not require disassembly one by one, can meet the needs of time saving, labor saving, and high efficiency, reduce operation time, improve work efficiency, can save 90% of the workload, and prevent the occurrence of secondary defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 This is the overall schematic diagram of the generator rotor cooling water backwash tool.

[0027] Figure 2 This is a schematic diagram of the flow direction of the rotor cooling water when it is working.

[0028] Figure 3 This is a schematic diagram of branch backwashing.

[0029] Figure 4 Schematic diagram of the working principle of the generator rotor cooling water backwash tool. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1, reference Figures 1 to 4 , which is the first embodiment of the present invention, provides a generator rotor cooling water backwashing tool, comprising:

[0034] A plugging mechanism 100 is arranged at the central hole of the generator rotor, and a flushing channel 101 is arranged inside the plugging mechanism 100 for connecting any branch of the generator cooling water.

[0035] In this embodiment, after the generator rotor cooling water backwashing tool is installed into the generator rotor center hole, one of the branches is connected through the flushing channel 101, and the generator cooling water is controlled to flow in the reverse direction to achieve reverse flushing.

[0036] Specifically, the flushing channel 101 is connected to a docking area 101a and a discharge area 101b. In this embodiment, the docking area 101a is used to connect a branch of the generator cooling water, and the discharge area 101b is used to discharge the backwashing water.

[0037] Furthermore, the docking area 101 a is provided on the outer wall surface of the blocking mechanism 100 , and the discharge area 101 b is provided at the end of the blocking mechanism 100 .

[0038] The diameter of one end where the discharge area 101b is located is smaller than the diameter of one end of the blocking mechanism 100 away from the discharge area 101b. In this embodiment, by reducing the diameter, the pressure of the cooling water can be increased to improve the flushing effect.

[0039] Preferably, the docking area 101a is a porous structure; the discharge area 101b is a porous structure. In this embodiment, the porous structure is provided to facilitate the flow of liquid and impurities into the flushing channel 101 during backwashing.

[0040] Reference Figure 2 , the flow direction of cooling water during operation is as follows Figure 2 As shown, cooling water enters from the cooling water inlet, flows into branches 1, 3, 5, 7, 9, 11, 13, and 15 respectively, flows out from branches 2, 4, 6, 8, 10, 12, 14, and 16, and is finally discharged from the cooling water outlet.

[0041] Reference Figure 3 The existing backwashing process is: when backwashing the rotor cooling water pipe, the outlet pipe of one group of branches is connected to the water inlet, and the inlet pipe is connected to the outlet pipe for drainage. After the backwashing is completed, the inlet pipe and the outlet pipe are blocked, and the next group of branches are backwashed, and so on, until all flushing is completed.

[0042] Reference Figure 4The flushing of the present invention is as follows: insert the generator rotor cooling water backwashing tool into the center hole of the generator rotor, align the docking area 101a with the water inlet hole of the innermost group, in this case, the other water inlet holes are all blocked, and backwashing water is injected from the water inlet of the schematic diagram. The water first fills pipes 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 15, 16 and then enters from water channel 8, leaving water channel 7 and being discharged through the water outlet to complete the backwashing of water channels 7 and 8. When flushing branches 5 and 6, pull out the special tool a little, align the docking area 101a of the special tool with the hole of pipe 5 in the schematic diagram, and inject backwashing water from the water inlet to complete the backwashing of the water circuits of groups 5 and 6 of coils, and so on, until all backwashing is completed.

[0043] In summary, the device has strong practicality in the backwashing of generator cooling water, can meet the needs of time saving, labor saving and high efficiency, reduce operation time, improve work efficiency, save 90% of the workload, and prevent the occurrence of secondary defects.

[0044] Example 2, reference Figure 1 to Figure 4 , which is the second embodiment of the present invention, is different from the previous embodiment in that this embodiment provides a method for backwashing cooling water of a generator rotor, comprising:

[0045] A blocking mechanism 100 is provided in the central hole of the generator rotor;

[0046] A flushing channel 101 is provided in the blocking mechanism 100;

[0047] Connect the flushing channel 101 to any branch of the generator cooling water;

[0048] Change the flow direction of generator cooling water for reverse flushing.

[0049] Specifically, the blocking mechanism 100 is slid to connect the flushing channel 101 to different cooling water branches, and the flushing branches are changed. By connecting to different cooling water branches, flushing of different positions is achieved.

[0050] Furthermore, the blocking mechanism 100 can block the remaining cooling water branches that are not aligned with the flushing channel 101 , and the remaining branches that are not flushed can be blocked by the blocking mechanism 100 .

[0051] During reverse flushing, flush from the branch far away from the water outlet of the flushing channel 101 to the branch close to the water outlet of the flushing channel 101 in sequence. When flushing, flush the far end first to facilitate the discharge of impurities and avoid residue and backwashing.

[0052] The outer wall size of the blocking mechanism 100 matches the inner wall size of the generator rotor center hole, thereby improving the blocking effect of the blocking mechanism 100.

[0053] Reference Figure 4 The flushing of the present invention is as follows: the blocking mechanism 100 is inserted into the central hole of the generator rotor, and the flushing channel 101 is aligned with the water inlet hole of the innermost group. In this case, the other water inlet holes are all blocked, and backwashing water is injected from the water inlet of the schematic diagram. The water first fills pipes 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 15, and 16, and then enters from water channel 8, leaving water channel 7, and is discharged through the water outlet to complete the backwashing of water channels 7 and 8. When flushing branches 5 and 6, the blocking mechanism 100 is pulled out a little, and the flushing channel 101 in the blocking mechanism 100 is aligned with the hole of pipe 5 in the schematic diagram, and backwashing water is injected from the water inlet to complete the backwashing of the water circuits of groups 5 and 6 of coils, and so on, until all backwashing is completed.

[0054] In summary, this method can meet the needs of saving time, labor and efficiency, reduce operation time, improve work efficiency, save 90% of the workload and prevent the occurrence of secondary defects.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A generator rotor cooling water backwashing tool, characterized in that: include, A plugging mechanism (100) is arranged at the central hole of a generator rotor, wherein a flushing channel (101) for connecting to any branch of the generator cooling water is arranged inside the plugging mechanism (100).

2. The generator rotor cooling water backwashing tool according to claim 1, characterized in that: The flushing channel (101) is connected to a docking area (101a) and a discharge area (101b).

3. The generator rotor cooling water backwashing tool according to claim 2, characterized in that: The docking area (101a) is provided on the outer wall surface of the blocking mechanism (100), and the discharge area (101b) is provided at the end of the blocking mechanism (100).

4. The generator rotor cooling water backwashing tool according to claim 3, characterized in that: The diameter of one end where the discharge area (101b) is located is smaller than the diameter of one end of the blocking mechanism (100) that is away from the discharge area (101b).

5. The generator rotor cooling water backwashing tool according to any one of claims 2 to 4, characterized in that: The docking area (101a) is a hole-shaped structure; The discharge area (101b) is a hole-shaped structure.

6. A method for backwashing cooling water of a generator rotor, characterized in that: include, A sealing mechanism (100) is arranged in the central hole of the generator rotor; A flushing channel (101) is provided in the blocking mechanism (100); Connecting the flushing channel (101) to any branch of the generator cooling water; Change the flow direction of generator cooling water for reverse flushing.

7. The method for backwashing cooling water of a generator rotor according to claim 6, characterized in that: The blocking mechanism (100) is slid to connect the flushing channel (101) to different cooling water branches, thereby changing the flushing branch.

8. The method for backwashing cooling water of a generator rotor according to claim 6 or 7, characterized in that: The blocking mechanism (100) can block the remaining cooling water branches that are not aligned with the flushing channel (101).

9. The method for backwashing cooling water of a generator rotor according to claim 8, characterized in that: During reverse flushing, flushing is performed sequentially from the branch away from the water outlet of the flushing channel (101) to the branch close to the water outlet of the flushing channel (101).

10. The method for backwashing cooling water of a generator rotor according to claim 9, characterized in that: The outer wall size of the sealing mechanism (100) matches the inner wall size of the generator rotor center hole.

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