CN219974583U - Standby oil supply system for top shaft oil of steam turbine generator unit - Google Patents
Standby oil supply system for top shaft oil of steam turbine generator unit Download PDFInfo
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- CN219974583U CN219974583U CN202321650732.6U CN202321650732U CN219974583U CN 219974583 U CN219974583 U CN 219974583U CN 202321650732 U CN202321650732 U CN 202321650732U CN 219974583 U CN219974583 U CN 219974583U
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- 239000003921 oil Substances 0.000 claims abstract description 359
- 239000010687 lubricating oil Substances 0.000 claims abstract description 37
- 241001584775 Tunga penetrans Species 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005461 lubrication Methods 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of turbine lubricating oil systems, and discloses a standby oil supply system for top shaft oil of a steam turbine generator unit. The standby oil supply system is characterized in that an oil outlet of an alternating-current lubricating oil pump and an oil outlet of a direct-current lubricating oil pump are respectively connected with a third oil supply path through a second manual valve and a first manual valve, the oil outlet of a second oil injector is connected with the third oil supply path, the third oil supply path sequentially passes through a cooler group and a filter group and supplies oil to each bearing of a steam turbine and a jigger device, a fourth oil supply path is connected with the third oil supply path to supply oil to a top shaft oil device through a branch oil path, a manual regulating valve is arranged on the branch oil path, a manual control valve is arranged on the fourth oil supply path, the bottom of a main oil tank is connected with the fourth oil supply path through a standby oil path, and a manual isolating valve is arranged on the standby oil path. The backup oil way is used for supplying oil to the top shaft oil device, so that the establishment of the top shaft oil way of the bearing bush under the shutdown of a unit lubricating oil system is realized.
Description
Technical Field
The utility model belongs to the technical field of turbine lubricating oil systems, and particularly relates to a standby oil supply system for top shaft oil of a steam turbine generator unit.
Background
When the turbo generator set operates at the rated rotation speed, the lubricating oil system (action and working principle) supplies oil to each bearing and the jigger device of the turbo generator set by the main oil pump, and besides the main oil pump is used for lubricating and cooling the bearings, a stable oil film is formed in the bearings, so that good rotation of the rotor is maintained, and stable and sufficient pressure oil is provided for the jigger system, the top shaft oil system, the generator seal oil system and the low-pressure safety oil, so that the jigger system, the top shaft oil system, the generator seal oil system and the low-pressure safety oil work normally. The jacking oil device is an important device of the steam turbine unit, and plays a role in jacking a rotor in the turning and stopping processes of the steam turbine unit. At present, the oil absorption of the top shaft oil device in the domestic large and small steam turbine generator unit comes from a lubricating oil pump outlet and a lubricating oil main pipe behind an oil cooler, the oil absorption enters an oil absorption port of the top shaft oil pump through a double-cylinder oil filter, and after the oil pump works, pressure oil at the oil pump outlet enters an oil outlet integrated assembly through a high-pressure integrated assembly to be distributed to bearings of each phase, so that the purpose of top shaft is realized.
However, under the extreme accident condition during the start-up and stop of the unit, namely, the alternating current lubrication oil pump and the direct current lubrication oil pump of the unit are failed to start, once the lubrication of a main lubrication oil pipe is lost, dry friction is generated between a bearing bush and a shaft, and thermal metal of the unit conducts heat, so that a large amount of heat cannot be taken away, the temperature of the bearing bush and a shaft neck is rapidly increased, the bearing bush and the shaft are damaged, meanwhile, a jacking oil device cannot start, a static pressure oil film cannot be formed between a rotor and a bearing oil bag, the rotor cannot jack up, the dry friction between the shaft neck and the bearing bush is increased, the jigger torque is overlarge, the rotor cannot drive, and finally the oil interruption and the bearing bush burning and the large shaft bending accidents are caused. In addition, the monitoring probe of the turbine body comprises measuring probes such as rotating speed, shaft vibration, expansion difference, axial displacement, eccentricity, cover vibration, thermal expansion and the like, and the safe and stable operation of the unit can be ensured only through accurate measurement and effective monitoring. The detection and calibration of each probe are needed to be prevented in advance during the shutdown period of the unit, and the maintenance work is needed to shut down the lubricating oil system to uncover the cover of the bearing box, because the temporary maintenance period of the domestic unit is 5-7 days, the cooling time of the rotor and the cylinder is long, and the lubricating oil system and the jigger system cannot be shut down in order to avoid the adverse conditions of bearing bush burning loss, large shaft bending and the like, so that the detection work of each measuring probe cannot be carried out in a limited time, and hidden danger is caused for the safe operation of the unit.
Therefore, a need exists to design a backup oil source system for the top axle oil under the condition of the shutdown of the lubricating oil system, which is used for solving the problems that the lubricating oil is cut off, the top axle oil cannot be started, and the jigger cannot be put into operation; meanwhile, the purpose that the lubricating oil system is stopped for short time during the thermal state temporary stopping maintenance of the unit and the cover of the bearing box is uncovered to maintain the measuring probe of the turbine body and parts in the box can be achieved.
Disclosure of Invention
Aiming at the condition of turbine lubricating oil cut-off occurring under the extreme accident working condition during the start-up and stop of a unit in the background art and the requirement that a turbine body monitoring probe needs to overhaul the cover of a bearing box when a lubricating oil system and a jigger system are in normal operation. The utility model provides a standby oil supply system for top shaft oil of a steam turbine generator unit, which is used for realizing the starting of the top shaft oil system to supply the top shaft oil, effectively reducing the temperature of a bearing and achieving the purpose of manual jigger; meanwhile, the purpose that the lubricating oil system is stopped for a short time during the thermal state temporary stopping maintenance of the unit and is used for uncovering the cover of the bearing box to maintain the measuring probe of the turbine body and parts in the box is achieved.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a reserve oil feeding system of turbo generator set top shaft oil, including the main tank, be provided with three routes oil feed way respectively and connect the high-pressure start oil pump on the main tank, the alternating current lubrication oil pump, the oil inlet of direct current lubrication oil pump is connected, be provided with first oil jet, the second oil jet respectively in the main tank, the oil-out of turbo main oil pump divides two return oil circuit, and one of them returns oil way and is connected with the oil inlet of first oil jet, the second oil jet respectively, the oil-out of high-pressure start oil pump is connected with first oil feed way through first check valve, another one returns oil way and is connected with first oil feed way through the second check valve, the oil-out of alternating current lubrication oil pump is connected with the second oil feed way, the oil-out of alternating current lubrication oil pump, direct current lubrication oil pump is connected with the third oil feed way through second manual valve, first manual valve, one of them returns oil way and is connected with the third oil feed way respectively, the third manual valve sets is connected with the reserve oil feed way for the filter, the filter sets is connected with the fourth oil feed way through the fourth oil feed way in proper order, the filter sets is provided with the reserve oil feed way in the fourth oil feed way, the manual oil feed way is connected with the fourth oil feed way through the filter, the filter sets is provided with the reserve oil feed way.
As further explanation and limitation of the above technical solution, the oil cooler group includes a main and a standby oil paths, and a main oil cooler and a standby oil cooler are respectively disposed on the main and standby oil paths, a second inlet valve and a first inlet valve are respectively disposed on the main and standby oil paths on the oil inlet side, and a first outlet valve and a second outlet valve are respectively disposed on the main and standby oil paths on the oil outlet side.
As a further supplementary explanation of the above technical solution, a first bypass oil path is provided between the main and standby cooling oil paths on the oil inlet side, and a first switching valve is provided on the first bypass oil path.
As further explanation and limitation of the above technical solution, the filter set includes a main filtering oil path and a standby filtering oil path, and a main filter and a standby filter are respectively disposed on the main filtering oil path and the standby filtering oil path, an oil inlet side of the main filtering oil path and the standby filtering oil path is connected with an oil outlet side of the main cooling oil path and the standby cooling oil path through a first three-way valve, and the main filtering oil path and the standby filtering oil path are connected with a third oil supply path through a second three-way valve.
As a further supplementary explanation of the above technical solution, a second side oil path and a third side oil path are respectively provided between the main and standby filter oil paths on the oil inlet side and the oil outlet side, a third switching valve is provided on the second side oil path, and a fourth switching valve is provided on the third side oil path.
As a further supplementary explanation of the above technical solution, the oil outlets of the first oil jet and the second oil jet are respectively provided with a third check valve and a fourth check valve.
Compared with the prior art, the utility model has the following advantages:
1. the utility model can close the manual regulating valve under the emergency of fault of the AC oil pump and the DC oil pump, or when the machine set thermal state temporary repair needs to stop the lubricating oil system to uncover the bearing box cover, open the manual control valve and the manual isolation valve, and the top axle oil device uses the main oil tank lubricating oil as the oil source for supplying oil, thereby realizing the establishment of the top axle oil of the bearing bush under the stop of the machine set lubricating oil system, the investment of the manual jigger, reducing the temperature of the bearing bush, effectively preventing the fault of oil-cutting and the bearing bush burning and the large axle bending accident, and realizing the purpose of uncovering the bearing box cover to inspect and calibrate the measuring probe and parts in the box.
2. The oil cooler group and the filter group are respectively added with the side oil way, the side oil way is provided with the switching valve, a new oil way is established by operating the switching valve, the normal operation of the oil supply line is further ensured, and in addition, the inlet valve and the outlet valve can be operated to start the oil cooler, or the starting of the filter can be realized by operating the three-way valve.
3. The modification scheme of the standby oil supply system is simple to implement, and has obvious effect in the period of operation.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model.
In the figure: the hydraulic oil pump comprises a main oil tank 1, a first oil injector 2, a second oil injector 3, a high-pressure starting oil pump 4, an alternating-current lubricating oil pump 5, a direct-current lubricating oil pump 6, a first check valve 7, a second check valve 8, a third check valve 9, a fourth check valve 10, a first manual valve 11, a second manual valve 12, a fifth check valve 13, a second inlet valve 14, a first inlet valve 15, a main oil cooler 16, a backup oil cooler 17, a first outlet valve 18, a second outlet valve 19, a first switching valve 20, a main filter 21, a backup filter 22, a first three-way valve 23, a second three-way valve 24, a third switching valve 25, a fourth switching valve 26, a manual regulating valve 27, a manual control valve 28 and a manual isolation valve 29.
Detailed Description
In order to further illustrate the technical solution of the present utility model, the present utility model will be further illustrated by two examples according to the field implementation with reference to fig. 1.
Example 1
As shown in fig. 1, a standby oil supply system for top shaft oil of a turbo generator set comprises a main oil tank 1, wherein three paths of oil supply ways are respectively connected with a high-pressure starting oil pump 4, an alternating-current lubricating oil pump 5 and an oil inlet of a direct-current lubricating oil pump 6, a first oil injector 2 and a second oil injector 3 are respectively arranged in the main oil tank 1, an oil outlet of the turbo main oil pump is divided into two loops of oil ways, one of the oil supply ways is respectively connected with oil inlets of the first oil injector 2 and the second oil injector 3, an oil outlet of the high-pressure starting oil pump 4 is connected with the first oil supply way through a first check valve 7, the other one of the oil supply ways is connected with the first oil supply way through a second check valve 8, an oil outlet of the alternating-current lubricating oil pump 5 is connected with a fifth check valve 13, an oil outlet of the first oil injector 2 is connected with the second oil supply way, an oil outlet of the direct-current lubricating oil pump 6 is respectively connected with the third oil supply way through a second manual valve 12 and a first manual valve 11, the third oil supply way is connected with a third oil supply way, the third oil injector is connected with a fourth oil supply way through a manual oil filter set, and is arranged on the fourth oil supply way, and is connected with a fourth oil supply way, and is provided with a manual oil filter set, and is connected with a standby oil supply way, and is provided with a manual oil filter set, and is connected with a fourth oil supply way, an oil filter is arranged on the fourth oil supply way and has an oil supply way.
In this embodiment, the oil cooler set includes a main and a standby oil paths, a main oil cooler 16 and a standby oil cooler 17 are respectively disposed on the main and standby oil paths, a second inlet valve 14 and a first inlet valve 15 are respectively disposed on the main and standby oil paths on the oil inlet side, and a first outlet valve 18 and a second outlet valve 19 are respectively disposed on the main and standby oil paths on the oil outlet side.
The filter group comprises a main filtering oil way and a standby filtering oil way, wherein a main filter 21 and a standby filter 22 are respectively arranged on the main filtering oil way and the standby filtering oil way, the oil inlet side of the main filtering oil way and the standby filtering oil way is connected with the oil outlet side of the main cooling oil way and the standby cooling oil way through a first three-way valve 23, and the main filtering oil way and the standby filtering oil way are connected with a third oil supply way through a second three-way valve 24.
In the above embodiment, the first oil supply path is divided into two paths for supplying oil to the mechanical overspeed device, the manual tripping device and the standby high-pressure sealing oil, and the second oil supply path is divided into two paths for supplying oil to the main oil pump of the turbine and supplying oil to the standby low-pressure sealing oil.
Example two
In order to ensure the normal operation of the whole lubricating oil system, the main and standby oil coolers and the main and standby filter oil ways are convenient to replace in time. We supplement the following embodiments in example one: (1) The oil outlets of the first oil shooter 2 and the second oil shooter 3 are respectively provided with a third check valve 9 and a fourth check valve 10; (2) A first bypass oil path is arranged between the main cold oil path and the standby cold oil path which are positioned at the oil inlet side, and a first switching valve 20 is arranged on the first bypass oil path; (3) A second side oil path and a third side oil path are respectively arranged between the main filtering oil path and the standby filtering oil path which are positioned at the oil inlet side and the oil outlet side, a third switching valve 25 is arranged on the second side oil path, and a fourth switching valve 26 is arranged on the third side oil path. In this embodiment, taking the main oil cooler and the auxiliary oil cooler as examples, if any one of the inlet valves fails, the first switching valve can switch the outlet valve of the other path to replace the oil path, and the auxiliary oil cooler can be started to replace the main oil cooler through the cooperation of the inlet valve and the outlet valve when the first switching valve is closed. If any three-way valve fails, the operation is as above, and the normal operation of the oil way is ensured by operating the second switching valve or the third switching valve to realize the replacement of the oil way.
The working principle is as follows: during the start-up and stop of the turbo generator set, the alternating-current lubricating oil pump operates normally, and under the condition that the direct-current accident oil pump can be used normally, the manual regulating valve and the manual control valve are opened, the manual isolating valve is closed, and the oil supply device of the top shaft uses the oil source of the oil cooler outlet lubricating oil main pipe to supply oil. When the alternating current oil pump and the direct current oil pump are in failure, the manual regulating valve is closed under the emergency that the lubricating oil system breaks oil or when the unit thermal state temporary repair needs to stop the lubricating oil system to uncover the bearing box cover, the manual control valve and the manual isolating valve are opened to be closed, and the main oil tank lubricating oil is used as oil source for supplying oil by the top shaft oil device, so that the establishment of bearing bush top shaft oil under the stop of the unit lubricating oil system is realized, the investment of a manual jigger is realized, the bearing bush temperature is reduced, the aims of effectively preventing broken oil and bush burning and large shaft bending accidents are realized, and the aims of uncovering the bearing box cover to inspect and calibrate a measuring probe and parts in the box are realized.
While the principal features and advantages of the present utility model have been shown and described, it will be apparent to those skilled in the art that the detailed description of the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other embodiments without departing from the spirit or essential characteristics of the utility model, and the inventive concept and design concept of the utility model shall be equally included in the scope of the utility model disclosed in the appended claims. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a reserve oil feeding system of turbo generator set top shaft oil, including main oil tank (1), be provided with three routes oil feed way respectively on main oil tank (1) and connect high-pressure start oil pump (4), exchange lubricating oil pump (5), the oil inlet of direct current lubricating oil pump (6) is connected, be provided with first oil jet (2) respectively in main oil tank (1), second oil jet (3), the oil-out of turbo generator main oil pump divides two return oil ways, and one of them returns the oil way and is connected with first oil jet (2), the oil inlet of second oil jet (3) respectively, the oil-out of high-pressure start oil pump (4) is connected with first oil feed way through first check valve (7), another oil return way is connected with first oil feed way through second check valve (8), the oil-out of exchanging lubricating oil pump (5) is connected with fifth check valve (13) and is connected with the second oil feed way, the oil-out of first oil jet (2) is connected with the second oil feed way, its characterized in that: the oil outlets of the alternating-current lubricating oil pump (5) and the direct-current lubricating oil pump (6) are respectively connected with a third oil supply path through a second manual valve (12) and a first manual valve (11), the oil outlet of the second oil injector (3) is connected with the third oil supply path, the third oil supply path sequentially passes through a cooler group, a filter group and then supplies oil for each bearing of a steam turbine and a jigger device, a fourth oil supply path is connected with the third oil supply path after the filter group through a branch oil path and supplies oil for a top shaft oil device, a manual regulating valve (27) is arranged on the branch oil path, a manual control valve (28) is arranged on the fourth oil supply path, the bottom of the main oil tank (1) is connected with the fourth oil supply path through a standby oil path, and a manual isolating valve (29) is arranged on the standby oil path.
2. The backup oil supply system for turboset top shaft oil of claim 1, wherein: the oil cooler group comprises a main cold oil path and a standby cold oil path, wherein the main cold oil path and the standby cold oil path are respectively provided with a main oil cooler (16) and a standby oil cooler (17), the main cold oil path and the standby cold oil path which are positioned at the oil inlet side are respectively provided with a second inlet valve (14) and a first inlet valve (15), and the main cold oil path and the standby cold oil path which are positioned at the oil outlet side are respectively provided with a first outlet valve (18) and a second outlet valve (19).
3. The backup oil supply system for turboset top shaft oil of claim 2, wherein: a first side oil passage is arranged between the main cold oil passage and the standby cold oil passage which are positioned at the oil inlet side, and a first switching valve (20) is arranged on the first side oil passage.
4. A backup oil supply system for a turbo-generator set top shaft oil according to any one of claims 1 to 3, wherein: the filter group comprises a main filtering oil way and a standby filtering oil way, wherein a main filter (21) and a standby filter (22) are respectively arranged on the main filtering oil way and the standby filtering oil way, the oil inlet side of the main filtering oil way and the standby filtering oil way is connected with the oil outlet side of the main cooling oil way and the standby cooling oil way through a first three-way valve (23), and the main filtering oil way and the standby filtering oil way are connected with a third oil supply way through a second three-way valve (24).
5. The backup oil supply system for turboset top shaft oil of claim 4, wherein: a second side oil way and a third side oil way are respectively arranged between the main filtering oil way and the standby filtering oil way which are positioned at the oil inlet side and the oil outlet side, a third switching valve (25) is arranged on the second side oil way, and a fourth switching valve (26) is arranged on the third side oil way.
6. The backup oil supply system for turboset top shaft oil of claim 5, wherein: and a third check valve (9) and a fourth check valve (10) are respectively arranged on the oil outlets of the first oil jet device (2) and the second oil jet device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321650732.6U CN219974583U (en) | 2023-06-27 | 2023-06-27 | Standby oil supply system for top shaft oil of steam turbine generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321650732.6U CN219974583U (en) | 2023-06-27 | 2023-06-27 | Standby oil supply system for top shaft oil of steam turbine generator unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974583U true CN219974583U (en) | 2023-11-07 |
Family
ID=88580974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321650732.6U Active CN219974583U (en) | 2023-06-27 | 2023-06-27 | Standby oil supply system for top shaft oil of steam turbine generator unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974583U (en) |
-
2023
- 2023-06-27 CN CN202321650732.6U patent/CN219974583U/en active Active
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