CN112636537A - Stator bar cleaning system - Google Patents
Stator bar cleaning system Download PDFInfo
- Publication number
- CN112636537A CN112636537A CN202011439787.3A CN202011439787A CN112636537A CN 112636537 A CN112636537 A CN 112636537A CN 202011439787 A CN202011439787 A CN 202011439787A CN 112636537 A CN112636537 A CN 112636537A
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- Prior art keywords
- solenoid valve
- inlet
- water tank
- stator
- outlet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The application discloses stator bar's clean system, system is applied to turbo generator, includes: the device comprises a fixed cooling water tank, a stator bar, a nitrogen device, a plurality of electromagnetic valves and a plurality of pipelines, wherein the lower part of the fixed cooling water tank is provided with an outlet and an inlet; said outlet and said inlet connecting said first and second ends of said stator bars by said conduit forming a closed loop; the nitrogen device is connected to the pipeline between the stator cold water tank and the stator bar. This application is through inserting nitrogen device in clean system, nitrogen device injects the nitrogen gas back into the pipeline of system for the impact force of rivers increases, thereby has strengthened the clean effect to the stator bar, avoids the hollow bar of stator to block up.
Description
Technical Field
The application relates to a clean field of turbo generator especially relates to a clean system of stator bar.
Background
The large-scale turbo generator usually adopts a water hydrogen cooling mode, and a stator winding is circularly cooled by a closed type fixed cooling water system. If impurities exist in the stator cooling water system or the water quality is unqualified, the stator cooling water copper ions exceed the standard, the hollow coil bar of the stator is blocked, the heat dissipation effect of the stator winding of the generator is affected in severe cases, and the serious consequence of the deformation of the stator winding is caused.
Disclosure of Invention
In order to solve the above problems, the present invention provides a stator bar cleaning system, which is applied to a steam turbine generator, and comprises: a fixed cold water tank, a stator bar, a nitrogen device, a plurality of electromagnetic valves and a plurality of pipelines,
the lower part of the fixed cold water tank is provided with an outlet and an inlet;
said outlet and said inlet connecting said first and second ends of said stator bars by said conduit forming a closed loop;
the nitrogen device is connected to the pipeline between the stator cold water tank and the stator bar.
Optionally, the first end and the second end are respectively connected to a solenoid valve, which is a seventh solenoid valve and an eighth solenoid valve, and the seventh solenoid valve and the eighth solenoid valve are opened and closed at a preset frequency.
Optionally, the number of the outlets of the cooling water tank is one, and the inlet of the cooling water tank comprises a first inlet and a second inlet.
Optionally, the system further comprises a water pump connected to an outlet of the chilled water tank.
Optionally, the outlet of the chilled water tank, the stator bars, the first inlet, and the number of conduits form a forward flushing circuit; the outlet of the chilled water tank, the stator bars, the second inlet, and the number of conduits form a back flush circuit.
Optionally, the forward flushing loop comprises an outlet of the fixed cold water tank, a water pump, a first electromagnetic valve, the nitrogen device, the first end, the second end and a first inlet which are sequentially connected.
Optionally, the back flushing loop includes an outlet of the chilled water tank, a water pump, a first solenoid valve, a third solenoid valve, the second end, the first end, the nitrogen device, and a second inlet, which are connected in sequence, wherein the third solenoid valve is disposed between the first solenoid valve and the first inlet.
Optionally, the system further comprises a second solenoid valve disposed between the first solenoid valve and the nitrogen device, and a fourth solenoid valve disposed between the third solenoid valve and the first inlet.
Optionally, the working states of the second solenoid valve and the fourth solenoid valve are the same, and the working states of the second solenoid valve and the fourth solenoid valve are opposite to the working states of the third solenoid valve.
Optionally, the system further comprises a cartridge connected to the first end and the second end, respectively.
Optionally, the system further comprises a dosing device arranged at the upper part of the fixed cold water tank.
Optionally, the system further includes a main solenoid valve, the fixed cold water tank further includes a third inlet, and the main solenoid valve is disposed at the third inlet.
Optionally, a water level gauge is arranged in the fixed cold water tank.
Optionally, the system further comprises an overflow valve disposed between the main electronic valve and the third inlet.
Compared with the prior art, the invention has the following beneficial effects: the application provides a clean system of stator bar is applied to turbo generator, includes: the device comprises a fixed cooling water tank, a stator bar, a nitrogen device, a plurality of electromagnetic valves and a plurality of pipelines, wherein the lower part of the fixed cooling water tank is provided with an outlet and an inlet; said outlet and said inlet connecting said first and second ends of said stator bars by said conduit forming a closed loop; the nitrogen device is connected to the pipeline between the stator cold water tank and the stator bar. This application is through inserting nitrogen device in clean system, nitrogen device injects the nitrogen gas back into the pipeline of system for the impact force of rivers increases, thereby has strengthened the clean effect to the stator bar, avoids the hollow bar of stator to block up.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of a stator bar cleaning system provided by an embodiment of the present application;
FIG. 2 is a schematic structural view of yet another stator bar cleaning system provided by an embodiment of the present application.
The main reference numbers illustrate:
1-a fixed cold water tank, 11-an outlet, 12-a first inlet, 13-a second inlet, 14-a third inlet, 2-a stator bar, 3-a nitrogen device, 40-a general electromagnetic valve, 41-a first electromagnetic valve, 42-a second electromagnetic valve, 43-a third electromagnetic valve, 44-a fourth electromagnetic valve, 45-a fifth electromagnetic valve, 46-a sixth electromagnetic valve, 47-a seventh electromagnetic valve, 48-an eighth electromagnetic valve, 49-an overflow valve, 5-a water pump, 6-a filter box, 7-a dosing device and 8-a water level meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein.
The stator bar cleaning device provided by the embodiment of the application is described in detail through specific embodiments and application scenarios thereof with reference to the attached drawings.
Fig. 1 is a view of an embodiment of the present application, which provides a stator bar cleaning system, and the system is applied to a steam turbine generator, and comprises: the device comprises a fixed cooling water tank 1, a stator bar 2, a nitrogen device 3, a plurality of electromagnetic valves and a plurality of pipelines, wherein the lower part of the fixed cooling water tank 1 is provided with an outlet and an inlet; said outlet and said inlet connecting the first end 21 and the second end 22 of the stator bar 2 through said duct, forming a closed circuit; the nitrogen device 3 is connected to the pipeline between the cooling water tank 1 and the stator bar 2. By connecting the nitrogen device 3 into the cleaning system, after the nitrogen device 3 injects nitrogen into a pipeline of the system, the impact force of water flow is increased, so that the cleaning effect on the stator bar 2 is enhanced, and the blockage of the stator bar 2 is avoided.
Alternatively, the nitrogen gas device 3 is controlled to be opened and closed by a sixth electromagnetic valve 46. When the water pressure in the pipeline reaches the first preset value, the sixth electromagnetic valve 46 is opened, and the nitrogen device 3 injects nitrogen with the pressure value of the second preset value into the pipeline. Preferably, the first preset value is smaller than the second preset value, so that nitrogen can be smoothly flushed into the water flow. For example, the first preset value is 0.5MPa, and the second preset value is 0.6 MPa.
In one implementation, as shown in fig. 2, the first end 21 and the second end 22 of the stator bar 2 are respectively connected to a solenoid valve, i.e. in the vicinity of the inlet and outlet of the stator bar 2. The solenoid valves are a seventh solenoid valve 47 and an eighth solenoid valve 48. The seventh solenoid valve 47 and the eighth solenoid valve 48 are opened and closed at a preset frequency, for example, 1 time/second, and due to the fact that nitrogen gas with a specific air pressure is injected into the pipeline, when the seventh solenoid valve 47 and the eighth solenoid valve 48 are opened and closed at the preset frequency, a "water hammer" effect is formed, the "water hammer" acts on the inner cavity of the stator bar 2 to generate an impact force on the inner wall of the stator bar, so that the flushing and cleaning effects are achieved, and compared with the pure water flow flushing, the flushing and cleaning effects of the present application are better.
In one implementation, as shown in fig. 2, the number of the outlets 11 of the stationary cold water tank 1 is 1, and the inlets of the stationary cold water tank 1 include a first inlet 12 and a second inlet 13. Further, the system also comprises a water pump 5, wherein the water pump 5 is connected with an outlet 11 of the primary and secondary cold water tanks 1 and is used for pumping out water in the primary and secondary cold water tanks 1 at rated pressure and enabling the water to flow into the closed loop so as to provide a water source and water pressure for the whole closed loop.
Further, as shown in fig. 2, the system comprises a forward flushing loop and a directional flushing loop, and the stator bar 2 is flushed and cleaned in the forward and reverse directions, so that the cleaning effect can be further improved, and the internal blockage of the stator bar 2 can be prevented. Optionally, the forward flushing circuit includes an outlet 11 of the cooling water tank 1, a water pump 5, a first electromagnetic valve 41, the nitrogen device 3, the first end 21, the second end 22, and the first inlet 12, which are sequentially connected, where the first electromagnetic valve 41 is configured to control on and off of supply of water flow in the entire encapsulation circuit. When the first solenoid valve 41 is opened, water from the stator water tank enters the outlet of the nitrogen device 3, then flows into the cavity of the stator bar 2 from the first end 21, flows out from the second end 22, forms water flow from left to right as shown in fig. 1, namely forward water flow, passes through the outlet of the nitrogen device 3, and finally returns to the stator water tank through the first inlet 12 of the stator water tank 1, and forms a circulating system, and forward flushing of the cavity of the stator bar 2 is continuously carried out.
In one implementation, as shown in fig. 2, the back flushing loop includes an outlet 11 of the chilled water tank 1, a water pump 5, a first solenoid valve 41, a third solenoid valve 43, the second end 22, the first end 21, the nitrogen device 3, and a second inlet 13, which are connected in sequence. Wherein the third solenoid valve 43 is connected between the first solenoid valve 41 and the first inlet. The third electromagnetic valve 43 is used for controlling the switching of the back flushing loop, when the first electromagnetic valve 41 and the third electromagnetic valve 43 are opened, the water flow from the stator cold water tank will flow into the cavity of the stator bar 2 from the second end 22 after passing through the third electromagnetic valve 43, and flow out from the first end 21, and in the cavity of the stator bar 2, a water flow from right to left as shown in fig. 1, namely a back water flow, is formed, then passes through the outlet of the nitrogen device 3, and finally returns to the stator cold water tank 1 through the second inlet 13 of the stator cold water tank 1, so as to form a circulating system, and the back flushing of the cavity of the stator bar 2 is continuously carried out.
In one implementation, as shown in fig. 2, the system further includes a second solenoid valve 42 and a fourth solenoid valve 44, the second solenoid valve 42 is disposed between the first solenoid valve 41 and the nitrogen device 3, the fourth solenoid valve 44 is disposed between the third solenoid valve 43 and the first inlet 12, the second solenoid valve 42 is used for controlling the opening and closing of the forward flushing loop, in addition, the switching of the forward flushing and the reverse flushing can be realized by controlling the second solenoid valve 42, the third solenoid valve 43 and the fourth solenoid valve 44, and the forward flushing and the reverse flushing are switched according to a preset frequency, so that the impact force generated on the inner wall can be enhanced, and the cleaning effect can be improved. When the first solenoid valve 41, the second solenoid valve 42 and the fourth solenoid valve 44 are open and the third solenoid valve 43 is closed, a forward flushing circuit is selected at this time; when the first solenoid valve 41 and the third solenoid valve 43 are open and the second solenoid valve 42 and the fourth solenoid valve 44 are closed, the reverse flushing circuit is then gated.
In one implementation, as shown in fig. 2, optionally, the system may further include a fifth solenoid valve 45, where the fifth solenoid valve 45 is connected between the nitrogen device 3 and the second inlet 13, and is used to control the opening and closing of the return flow to the stationary and cold water tanks 1 during the back flushing, and also to control the opening and closing of the back flushing loop. When the first solenoid valve 41 and the third solenoid valve 43 are opened and the second solenoid valve 42 and the fourth solenoid valve 44 are closed, the back flushing loop is selected, and at this time, the effect of controlling the opening and closing of the back flushing loop can be achieved by controlling the opening and closing of the fifth solenoid valve 45.
With reference to fig. 2, in practical applications, impurities may be generated after the stator bar 2 is washed and flows into the circulation system, and in order to solve the technical problem, filter cartridges 6 are respectively arranged at two ends of the stator bar 2, and the filter cartridges 6 are used for filtering impurities in water flowing through so as to achieve better cleaning effect.
In one implementation mode, as shown in fig. 2, the system further includes a chemical adding device 7, the chemical adding device 7 is disposed on the upper portion of the fixed-cooling water tank 1, chemicals can be added into the fixed-cooling water tank 1 through the chemical adding device 7, and the chemicals are used for removing impurities in water and on inner walls of the devices. For example: an alkaline solvent may be added to remove scale from the water and/or the inner wall of each apparatus, and a weakly acidic solvent may be added to remove calcium-containing substances from the water and/or the inner wall of each apparatus, and thus, the apparatus is not corroded.
In one implementation, as shown in fig. 1 or 2, the system further includes a main solenoid valve 40, the chilled water tank further includes a third inlet 14, the main solenoid valve 40 is connected to the third inlet 14, and the main solenoid valve 40 is used for controlling the supply of water source injected into the chilled water tank 1. Furthermore, a water level meter 8 is arranged in the cooling water tank 1, so that a user can clearly know the water level condition of the cooling water tank 1, and meanwhile, the main electromagnetic valve 40 can control the opening and closing of the main electromagnetic valve 40 according to the information of the water level meter, so as to automatically supply water to the cooling water tank 1.
In one implementation, as shown in fig. 1 or 2, the system further includes a relief valve 9, the relief valve 9 being connected between the main electronic valve 40 and the third inlet 14 to prevent the water level in the fixed cold water tank 1 from exceeding a predetermined level.
In practical application, because a plurality of stator bars exist on the periphery of the turbonator, the first ends of all the stator bars can form a shared port through a water collecting ring, and similarly, the other end, namely the second end, of each stator bar forms another shared port through another water collecting ring. The corresponding pipeline connects all the stator bars into the circulating system by communicating with the common port, and the flushing and cleaning of all the stator bars are realized at the same time.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (14)
1. A stator bar cleaning system for a steam turbine generator, the system comprising: a fixed cold water tank, a stator bar, a nitrogen device, a plurality of electromagnetic valves and a plurality of pipelines,
the lower part of the fixed cold water tank is provided with an outlet and an inlet;
said outlet and said inlet connecting said first and second ends of said stator bars by said conduit forming a closed loop;
the nitrogen device is connected to the pipeline between the stator cold water tank and the stator bar.
2. The system of claim 1, wherein the first end and the second end are respectively connected with a solenoid valve, namely a seventh solenoid valve and an eighth solenoid valve, and the seventh solenoid valve and the eighth solenoid valve are opened and closed at a preset frequency.
3. The system of claim 1, wherein the chilled water tank has one outlet and the inlet comprises a first inlet and a second inlet.
4. The system of claim 3, further comprising a water pump connected to an outlet of the chilled water tank.
5. The system of claim 4, wherein the outlet of the chilled water tank, the stator bars, the first inlet, and the number of conduits form a forward flushing circuit; the outlet of the chilled water tank, the stator bars, the second inlet, and the number of conduits form a back flush circuit.
6. The system of claim 5, wherein the forward flushing loop comprises an outlet of the chilled water tank, a water pump, a first solenoid valve, the nitrogen device, the first end, the second end, and a first inlet connected in sequence.
7. The system of claim 5, wherein the back flushing loop comprises an outlet of the chilled water tank, a water pump, a first solenoid valve, a third solenoid valve, the second end, the first end, the nitrogen device, and a second inlet, which are connected in sequence, wherein the third solenoid valve is disposed between the first solenoid valve and the first inlet.
8. The system of claim 7, further comprising a second solenoid valve disposed between the first solenoid valve and the nitrogen unit and a fourth solenoid valve disposed between the third solenoid valve and the first inlet.
9. The system of claim 8, wherein the operating states of the second solenoid valve and the fourth solenoid valve are the same, and the operating states of the second solenoid valve, the fourth solenoid valve and the third solenoid valve are opposite.
10. The system of claim 1, further comprising a cartridge connected to the first end and the second end, respectively.
11. The system of claim 1, further comprising a dosing device disposed at an upper portion of the chilled water tank.
12. The system of claim 1, further comprising a master solenoid valve, the chilled water tank further comprising a third inlet, the master solenoid valve disposed at the third inlet.
13. The system of claim 12, wherein a water level gauge is provided in the chilled water tank.
14. The system of claim 12, further comprising a relief valve disposed between the main electronic valve and the third inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439787.3A CN112636537A (en) | 2020-12-10 | 2020-12-10 | Stator bar cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439787.3A CN112636537A (en) | 2020-12-10 | 2020-12-10 | Stator bar cleaning system |
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| Publication Number | Publication Date |
|---|---|
| CN112636537A true CN112636537A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011439787.3A Pending CN112636537A (en) | 2020-12-10 | 2020-12-10 | Stator bar cleaning system |
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| CN (1) | CN112636537A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005040A (en) * | 2014-04-23 | 2014-08-27 | 山东中实易通集团有限公司 | Method for solving obstruction of hollow lead of generator stator bar and inhibiting corrosion of hollow lead |
| CN206215585U (en) * | 2016-08-29 | 2017-06-06 | 大唐清苑热电有限公司 | A kind of water-cooled generator backwashing system |
| CN210350887U (en) * | 2019-11-05 | 2020-04-17 | 华润电力（常熟）有限公司 | Generator stator bar maintains device |
| CN210788360U (en) * | 2019-08-30 | 2020-06-19 | 大唐保定热电厂 | Backwashing device of water-cooled generator |
| CN211707559U (en) * | 2019-12-20 | 2020-10-20 | 山东中实易通集团有限公司 | A wash pre-filming equipment for generator decides cooling water system |
-
2020
- 2020-12-10 CN CN202011439787.3A patent/CN112636537A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005040A (en) * | 2014-04-23 | 2014-08-27 | 山东中实易通集团有限公司 | Method for solving obstruction of hollow lead of generator stator bar and inhibiting corrosion of hollow lead |
| CN206215585U (en) * | 2016-08-29 | 2017-06-06 | 大唐清苑热电有限公司 | A kind of water-cooled generator backwashing system |
| CN210788360U (en) * | 2019-08-30 | 2020-06-19 | 大唐保定热电厂 | Backwashing device of water-cooled generator |
| CN210350887U (en) * | 2019-11-05 | 2020-04-17 | 华润电力（常熟）有限公司 | Generator stator bar maintains device |
| CN211707559U (en) * | 2019-12-20 | 2020-10-20 | 山东中实易通集团有限公司 | A wash pre-filming equipment for generator decides cooling water system |
Non-Patent Citations (1)
| Title |
|---|
| 李维勇等: "330MW水氢氢发电机定子线棒堵塞处理", 《电力设备》 * |
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Application publication date: 20210409 |