CN114483215A - Emergency steam turbine generator unit for nuclear power station - Google Patents
Emergency steam turbine generator unit for nuclear power station Download PDFInfo
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- CN114483215A CN114483215A CN202210121449.8A CN202210121449A CN114483215A CN 114483215 A CN114483215 A CN 114483215A CN 202210121449 A CN202210121449 A CN 202210121449A CN 114483215 A CN114483215 A CN 114483215A
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- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 239000010687 lubricating oil Substances 0.000 claims abstract description 25
- 239000012208 gear oil Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 20
- 230000009467 reduction Effects 0.000 claims description 22
- 238000013016 damping Methods 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000008844 regulatory mechanism Effects 0.000 claims description 5
- 210000004907 gland Anatomy 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
Abstract
The invention discloses an emergency steam turbine generator unit for a nuclear power station, which relates to the technical field of steam turbines and comprises a steam turbine, a lubricating oil system and a generator connected with the steam turbine by a coupler, wherein the steam turbine comprises a main shaft, a cylinder and a gear speed reducing mechanism, a primary impeller and a secondary impeller are arranged in the cylinder, a front steam seal is arranged at one end of the cylinder, a rear steam seal is arranged at the other end of the cylinder, the lubricating oil system comprises a gear oil pump and an oil tank which are connected with each other, the gear speed reducing mechanism is connected with a hydraulic speed regulating mechanism, the gear speed reducing mechanism is connected with the main shaft through the coupler, a front bearing seat is arranged at one end of the main shaft, a rear bearing seat is arranged at the other end of the main shaft, the front bearing seat and the rear bearing seat are both connected with a pipeline of the lubricating oil system, and the main shaft penetrates through the front steam seal, the primary impeller, the secondary impeller and the rear steam seal. The invention can solve the problems that the emergency power supply system of the nuclear power station in the prior art is not reliable enough, the turbine generator has overspeed risk, the power supply is difficult to be lastingly supplied and the like.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to an emergency steam turbine generator unit for a nuclear power station.
Background
The power supply system in the nuclear power plant mainly comprises a unit power supply system, a stock power supply system and an emergency power supply system. Wherein the unit power system mainly comes from a main generator or an off-plant main power supply; the standby power supply system mainly comes from an off-plant standby power supply; the emergency power supply system mainly comes from a storage battery in a plant, an emergency diesel generator, a mobile diesel generator or a turbo generator set and the like. Nuclear safety is always the most important in nuclear power technology and industry development, wherein an emergency power supply system for dealing with power failure of a whole nuclear power plant is used as the last guarantee for safe operation of the nuclear power plant, and the safety and the reliability of the emergency power supply system have higher requirements.
The existing emergency power supply system of the nuclear power station has the following defects: the diesel generating set has weak capability of coping with serious natural disasters such as flood, tsunami and the like, the equipped fuel oil and lubricating oil increase the risk of fire, and after combustion, asphyxiating gas can be generated and the environment is polluted by smoke, oil stain and the like, and then the operation, the overhaul, the maintenance and the like of the equipment are complicated; the storage battery pack cannot meet the power supply requirement of high-power safety equipment, and the power supply time of the storage battery pack is limited; the mobile power supply equipment is difficult to arrive at the site in time when the road is seriously damaged; the existing turbonators still have overspeed risks, and a highly reliable and high-power turbonator meeting the emergency power supply requirement of a nuclear power station needs to be researched and developed.
Disclosure of Invention
The invention aims to provide a quick-start, high-reliability and high-power emergency steam turbine generator unit for a nuclear power station, which can meet the emergency power supply requirement of the nuclear power station, and can solve the problems of insufficient reliability of an emergency power supply system of the nuclear power station, overspeed risk of a steam turbine generator, difficulty in durable power supply and the like. The technical scheme provided by the invention is as follows:
an emergency steam turbine generator unit for a nuclear power station comprises a steam turbine, a lubricating oil system and a generator which is connected with the steam turbine by a coupler, the steam turbine comprises a main shaft, a cylinder and a gear speed reducing mechanism, wherein a primary impeller and a secondary impeller are arranged in the cylinder, one end of the cylinder is provided with a front gland seal, the other end of the cylinder is provided with a rear gland seal, the lubricating oil system comprises a gear oil pump and an oil tank which are connected with each other, the gear reduction mechanism is connected with the hydraulic speed regulating mechanism, the gear reduction mechanism is connected with the main shaft through a coupler, one end of the main shaft is provided with a front bearing seat, the other end of the main shaft is provided with a rear bearing seat, the front bearing seat and the rear bearing seat are both connected with a pipeline of the lubricating oil system, the main shaft penetrates through the front steam seal, the primary impeller, the secondary impeller and the rear steam seal.
Optionally, the upper end of the gear reduction mechanism is connected with the hydraulic speed regulation mechanism, and the lower end of the gear reduction mechanism is connected with a gear oil pump.
Optionally, be connected with the steam chamber on the cylinder, the cylinder with the steam chamber junction is equipped with the nozzle group, the steam chamber is connected with the regulation steam valve, the regulation steam valve with hydraulic speed adjusting mechanism connects, the regulation steam valve with the admission line connection of steam turbine.
Optionally, a valve rod of the regulating steam valve is connected with a damper, the valve rod of the regulating steam valve is further connected with the hydraulic speed regulating mechanism through a connecting rod mechanism, and the regulating steam valve adopts a double-seat valve structure.
Optionally, the damper comprises a damping force piston rod and an air flow limiting release valve, wherein the damper is filled with compressed air, and the air flow limiting release valve is used for circulating the compressed air.
Optionally, when the turbo generator set is started, the damping force piston rod is located at a preset position for preventing the adjusting steam valve from being opened fully, the position of the damping force piston rod is controlled by spring force and compressed air pressure, and the damper is used for controlling the opening time and the opening speed of the adjusting steam valve.
Optionally, an overpressure valve is arranged on an outlet pipeline of the gear oil pump, the overpressure valve is connected with the oil tank through a pipeline, an air cooler and an oil filter are further arranged on an outlet pipeline of the gear oil pump, and throttle orifice plates are arranged on pipelines of the lubricating oil system, which are connected with the front bearing seat and the rear bearing seat.
Optionally, a quick-closing valve is arranged on a steam inlet pipeline of the steam turbine, a critical breaker is arranged on a main shaft in the front bearing seat, and the critical breaker is connected with the quick-closing valve.
Optionally, be equipped with in the front bearing seat and be used for supporting the first bearing of main shaft, first bearing adopts the joint bearing of radial thrust, be equipped with the second bearing in the back bearing seat, first bearing with the second bearing all with gear oil pump with the oil tank is connected, be equipped with the rotational speed probe on the front bearing seat, the rotational speed probe gather be used for to gear reduction mechanism output angular displacement's actual rotational speed value.
Optionally, the quick-closing valve is positioned on a steam inlet pipeline connected with the regulating steam valve; the primary impeller and the secondary impeller are straight blade type two-end non-shroud structures.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the generator set is provided with a lubricating oil system, so that external oil supply is not needed, the generator set is suitable for starting the generator set during emergency power supply, and durable power supply is facilitated; the arrangement of the overpressure valve can prevent the lubricating oil pressure from being too high when the unit is overspeed, the hydraulic speed regulating mechanism is used for regulating and controlling the rotating speed of the steam turbine, and the strength and the rigidity of the rotor can be considered by adopting a combined structure of two split impellers;
(2) the gear oil pump is driven by the gear speed reducing mechanism, the gear oil pump also starts to work when the generator set is started, lubricating oil is conveyed for the operation of the generator set, and the opening of the steam regulating valve is controlled to regulate the steam inlet flow so as to control the rotating speed of the steam turbine; the generator set has the capability of quick start, and can reach the rated rotating speed of 3000rpm within 8 seconds;
(3) the opening time and the opening speed of the regulating steam valve can be limited by the aid of the damper, the damper can prevent the regulating steam valve from being fully opened to further cause overspeed, and mechanical tripping is avoided; the steam regulating valve adopts a double-seat valve structure, so that the steam flow force of the valve rod is reduced, and the steam regulating valve is matched with the steam chamber to ensure that a cylinder of the steam turbine can obtain double-path steam inlet;
(4) the compressed air in the damper provides dynamic driving force for the movement of the damping force piston rod, when the damping force piston rod retracts, the opening of the regulating steam valve is increased, the rotating speed of the steam turbine is increased, and when the damper contains sufficient compressed air, the damping force piston rod extends out and props against the regulating steam valve;
(5) the emergency breaker and the quick closing valve are arranged to protect the generator set, and the angular displacement is output by comparing the actual rotating speed value acquired by the rotating speed probe with the target rotating speed set value, so that the closed-loop control of the rotating speed of the steam turbine is realized, and the reliability is higher; the straight blade type with two ends without shroud structures can be conveniently processed into the impeller.
Drawings
Fig. 1 is a schematic structural diagram of an emergency steam turbine generator unit for a nuclear power station according to an embodiment of the present invention;
fig. 2 is a sectional view of a steam turbine of an emergency steam turbine generator unit for a nuclear power plant according to an embodiment of the present invention;
fig. 3 is a partial cross-sectional view of a regulating steam valve of an emergency steam turbine generator unit for a nuclear power plant according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a damper structure of an emergency steam turbine generator unit for a nuclear power plant according to an embodiment of the present invention.
Reference numerals: 1. a gear oil pump; 2. a hydraulic speed regulating mechanism; 3. a front bearing seat; 4. a coupling; 5. a critical circuit breaker; 6. a first bearing; 71. front steam sealing; 72. carrying out rear steam sealing; 8. a cylinder 9, a primary impeller 10 and a secondary impeller; 11. a rear bearing seat 12, a second bearing; 13. a main shaft; 14. a rear support; 15. a steering guide vane ring; 16. a nozzle group; 17. a steam chamber; 18. adjusting a steam valve; 19. a front support; 20. a chassis; 21. a gear reduction mechanism; 22. a damper; 23. a rotational speed probe; 24. an oil tank; 25. an air cooler; 26. an oil filter; 27. quickly closing the valve; 28. an overpressure valve; 221. a damping force piston rod; 222. an air flow-limiting release valve; 30. a steam turbine; 33. an electric generator.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, integrally connected, or detachably connected; either mechanically or electrically, or internally communicating two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meanings of the above terms according to specific situations.
As shown in fig. 1 and 2, an emergency turbo generator set for a nuclear power plant, the whole set of the generator set is a horizontal structure, and includes a steam turbine, a lubricating oil system and a generator connected with a main shaft of the steam turbine by a coupler, the steam turbine and the generator are arranged on the same chassis, the steam turbine is arranged on the chassis by a front support and a rear support arranged at the bottom, the steam turbine includes a main shaft, a cylinder and a gear reduction mechanism, the steam turbine adopts a double-row complex stage, a first-stage impeller and a second-stage impeller are arranged in the cylinder, the first-stage impeller and the second-stage impeller adopt a sleeving structure with the main shaft, a front vapor seal is arranged at one end of the cylinder, a rear vapor seal is arranged at the other end of the cylinder, the lubricating oil system includes a gear oil pump and an oil tank which are connected with each other, the gear reduction mechanism is connected with a hydraulic speed regulation mechanism, the gear reduction mechanism is connected with the main shaft by the coupler, and a front bearing seat is arranged at one end of the main shaft, the other end of the main shaft is provided with a rear bearing seat, the front bearing seat and the rear bearing seat are both connected with a pipeline of a lubricating oil system, and the main shaft penetrates through the front steam seal, the primary impeller, the secondary impeller and the rear steam seal. The upper end of the gear reduction mechanism is connected with the hydraulic speed regulation mechanism, and the lower end of the gear reduction mechanism is connected with the gear oil pump. The steam chamber is connected with a steam chamber, a nozzle group is arranged at the joint of the steam chamber and the steam cylinder, the nozzle of the nozzle group faces the end part of the first-stage impeller, a steering guide vane ring is arranged at the bottom in the steam cylinder, the steering guide vane ring is adjacent to the nozzle group and is beneficial to reducing the influence of air flow impact on the blades, the steam chamber is connected with an adjusting steam valve, the adjusting steam valve is connected with a hydraulic speed regulating mechanism, and the adjusting steam valve is connected with a steam inlet pipeline of the steam turbine. The valve rod of adjusting the steam valve is connected with the attenuator, the valve rod of adjusting the steam valve still passes through link mechanism and connects hydraulic speed control mechanism, it adopts two-seat valve structure to adjust the steam valve, contain preceding case and back case, can provide the double-circuit admission for the cylinder, and can adapt to the steam of bigger pressure range, the admission route is shown in fig. 3, can reduce the fluctuation and the impact force that the valve rod removed and brought, it has the valve gap to adjust the steam valve, the valve rod passes this valve gap, the tip of valve rod has the drive division, this drive division and link mechanism swing joint, be equipped with the cavity tube-shape support that holds the drive division on the valve gap, the drive division can remove in this support, link mechanism contains a plurality of pivots, one of them pivot is located on this support, the drive division is driven by link mechanism back drive division also drives the valve rod removal simultaneously and realizes the regulation of adjusting the steam valve aperture.
The generator set also comprises a speed regulator, wherein the speed regulator receives an actual rotating speed value acquired by the rotating speed probe, compares the actual rotating speed value with a target rotating speed set value and outputs angular displacement to the gear reduction mechanism, and the steam valve is regulated to keep a certain opening degree at the initial stage of hot standby and starting of the generator set so as to ensure that the steam turbine can normally accelerate; meanwhile, the speed regulator can only participate in regulation when the steam turbine reaches a certain rotating speed, so that the opening time and the opening speed of the steam valve are limited and regulated through the damper and the air current-limiting release valve, when the rotating speed of the steam turbine is lower than the rotating speed of the speed regulator, the opening of the steam valve is regulated to be continuously increased until the steam valve is propped against a piston rod of the damper, and if the steam valve is regulated without the damper, the steam valve is instantly opened, so that the unit is overspeed.
The damper shown in fig. 4 includes a damping force piston rod and an air restriction release valve, the inside of the damper is filled with compressed air, and the air restriction release valve is used for the circulation of the compressed air. When the turbo generator set is started, the damping force piston rod is at a preset position for preventing the adjusting steam valve from being opened fully, the position of the damping force piston rod is controlled by spring force and compressed air pressure, the pressure of the compressed air overcomes the spring force and enables the damping force piston rod to extend out, the damping force piston rod abuts against a valve rod of the adjusting steam valve, the damper is used for controlling the opening time and the opening speed of the adjusting steam valve, the rotating speed of the steam turbine rises, the compressed air inside the damper passes through the air flow-limiting release valve and is discharged at a certain speed, the damper retracts along with the reduction of the internal air pressure under the action of the spring force, the generator set gradually rises after the adjusting steam valve is opened, and the speed regulator starts to intervene in adjusting the rotating speed after the rotating speed reaches a certain rotating speed.
The gear oil pump can output lubricating oil with the gauge pressure of 0.15-0.2 MPa, the oil temperature is controlled at 50-60 ℃, the flow rate of the lubricating oil is 8L/min, an overpressure valve used for preventing the excessive pressure of the lubricating oil is arranged on an outlet pipeline of the gear oil pump, the setting pressure of the overpressure valve is 0.22MPa, the overpressure valve is connected with an oil tank through a pipeline, the volume of the oil tank is 30-50L, preferably 35L, the maximum storage capacity of the lubricating oil is 30L, an air cooler and an oil filter are further arranged on an outlet pipeline of the gear oil pump, the lubricating oil is cooled and filtered through the air cooler on the pipeline and then is supplied to a turbine bearing through a throttling orifice plate, and throttling orifice plates are arranged on pipelines of a lubricating oil system, which are connected with a front bearing seat and a rear bearing seat. A quick closing valve is arranged on a steam inlet pipeline of the steam turbine, a critical breaker is arranged on a main shaft positioned in a front bearing seat, and the critical breaker is connected with the quick closing valve. The front bearing seat is internally provided with a first bearing for supporting the main shaft, the first bearing adopts a radial thrust combined bearing, the rear bearing seat is internally provided with a second bearing, the first bearing and the second bearing are both connected with a gear oil pump and an oil tank through pipelines, a sight window is arranged on the pipeline through which lubricating oil returns to the oil tank through the first bearing and the second bearing, the front bearing seat is provided with a rotating speed probe, the rotating speed probe acquires an actual rotating speed value for outputting angular displacement to the gear reduction mechanism, the rotating speed probe sends the actual rotating speed value to the speed regulator, the speed regulator outputs the angular displacement to the gear reduction mechanism according to the comparison of the actual rotating speed value and a target rotating speed set value, and the gear reduction mechanism is linked with a hydraulic reduction mechanism to control the opening degree of the steam valve, so that the purpose of controlling the rotating speed of the steam turbine is realized. When the rotating speed of the unit is lower than the target rotating speed, the speed regulator controls and adjusts the steam valve to be opened, the steam inlet quantity is increased, and the rotating speed of the steam turbine is increased. When the target rotating speed is exceeded, the speed regulator closes the regulating steam valve to reduce the steam inlet quantity and reduce the rotating speed of the steam turbine.
The quick closing valve is positioned on a steam inlet pipeline connected with the regulating steam valve; the primary impeller and the secondary impeller are of straight blade type with two ends free of shroud structures, which are more convenient to process, and blade roots are of fork structures and are fixed with the impellers through riveting pins.
Preferably, the nozzle group adopts a drilling nozzle, a reasonable scaling structure enables steam to reach supersonic speed after passing through the nozzle, and the rated power of the unit can reach 120kW by adopting a partial steam inlet structure.
In other embodiments, a critical safety device is also provided on the power generating unit to provide further overspeed protection to the steam turbine.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, without departing from the spirit of the present invention, a person of ordinary skill in the art should also understand that the present invention shall not be limited to the embodiments and the similar structural modes of the present invention.
Claims (10)
1. An emergency steam turbine generator unit for a nuclear power station is characterized by comprising a steam turbine, a lubricating oil system and a generator which is connected with the steam turbine by adopting a coupler, the steam turbine comprises a main shaft, a cylinder and a gear speed reducing mechanism, wherein a primary impeller and a secondary impeller are arranged in the cylinder, one end of the cylinder is provided with a front gland seal, the other end of the cylinder is provided with a rear gland seal, the lubricating oil system comprises a gear oil pump and an oil tank which are connected with each other, the gear reduction mechanism is connected with the hydraulic speed regulating mechanism, the gear reduction mechanism is connected with the main shaft through a coupler, one end of the main shaft is provided with a front bearing seat, the other end of the main shaft is provided with a rear bearing seat, the front bearing seat and the rear bearing seat are both connected with a pipeline of the lubricating oil system, the main shaft penetrates through the front steam seal, the primary impeller, the secondary impeller and the rear steam seal.
2. The emergency steam turbine generator unit for the nuclear power station as claimed in claim 1, wherein an upper end of the gear reduction mechanism is connected with the hydraulic speed regulation mechanism, and a lower end of the gear reduction mechanism is connected with a gear oil pump.
3. The emergency steam turbine generator unit of claim 1 or 2, wherein a steam chamber is connected to the cylinder, a nozzle set is arranged at a joint of the cylinder and the steam chamber, an adjusting steam valve is connected to the steam chamber, the adjusting steam valve is connected to the hydraulic speed regulation mechanism, and the adjusting steam valve is connected to a steam inlet pipeline of the steam turbine.
4. The emergency steam turbine generator unit for the nuclear power station as claimed in claim 3, wherein a valve rod of the regulating steam valve is connected with a damper, the valve rod of the regulating steam valve is further connected with the hydraulic speed regulating mechanism through a link mechanism, and the regulating steam valve adopts a double-seat valve structure.
5. The emergency steam turbine generator unit for the nuclear power station as claimed in claim 4, wherein the damper includes a damping force piston rod and an air restriction release valve, the damper is filled with compressed air, and the air restriction release valve is used for the circulation of the compressed air.
6. The emergency steam turbine generator unit for the nuclear power station as claimed in claim 5, wherein when the steam turbine generator unit is started, the damping force piston rod is at a preset position for preventing the regulating steam valve from being opened fully, the position of the damping force piston rod is controlled by spring force and compressed air pressure, and the damper is used for controlling the opening time and the opening speed of the regulating steam valve.
7. The emergency turbo generator set for the nuclear power plant according to claim 3, wherein an overpressure valve is arranged on an outlet pipeline of the gear oil pump, the overpressure valve is connected with the oil tank through a pipeline, an air cooler and an oil filter are further arranged on an outlet pipeline of the gear oil pump, and throttle orifice plates are arranged on pipelines of the lubricating oil system, which are connected with the front bearing block and the rear bearing block.
8. The emergency steam turbine generator unit of claim 3, wherein a quick-closing valve is arranged on the steam inlet pipeline of the steam turbine, and a critical breaker is arranged on the main shaft in the front bearing seat and connected with the quick-closing valve.
9. The emergency steam turbine generator unit for the nuclear power station as claimed in any one of claims 4 to 8, wherein a first bearing for supporting the main shaft is arranged in the front bearing seat, the first bearing adopts a radial thrust combined bearing, a second bearing is arranged in the rear bearing seat, the first bearing and the second bearing are both connected with the gear oil pump and the oil tank, a rotation speed probe is arranged on the front bearing seat, and the rotation speed probe acquires an actual rotation speed value for outputting an angular displacement to the gear reduction mechanism.
10. The emergency steam turbine generator unit for the nuclear power station as claimed in claim 8, wherein the quick closing valve is positioned on a steam inlet pipeline connected with the regulating steam valve; the primary impeller and the secondary impeller are straight blade type two-end non-shroud structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210121449.8A CN114483215B (en) | 2022-02-09 | 2022-02-09 | Emergency turbo generator set for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210121449.8A CN114483215B (en) | 2022-02-09 | 2022-02-09 | Emergency turbo generator set for nuclear power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114483215A true CN114483215A (en) | 2022-05-13 |
| CN114483215B CN114483215B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210121449.8A Active CN114483215B (en) | 2022-02-09 | 2022-02-09 | Emergency turbo generator set for nuclear power station |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH488926A (en) * | 1968-05-31 | 1970-04-15 | Konink Machf Stork N V | Turbine for a compressible propellant |
| CA2077841A1 (en) * | 1991-10-30 | 1993-05-01 | Anand D. Narayana | Impeller system for a gas turbine engine |
| CN104832582A (en) * | 2015-03-19 | 2015-08-12 | 柳州市永益机械制造有限公司 | Composite air spring |
| CN205036413U (en) * | 2015-09-24 | 2016-02-17 | 广州广重企业集团有限公司 | Steam turbine speed control mechanism's drive arrangement |
| CN206957770U (en) * | 2017-06-23 | 2018-02-02 | 杭州汽轮机股份有限公司 | A kind of 50MW grades bifurcated flow cogeneration steam turbine |
-
2022
- 2022-02-09 CN CN202210121449.8A patent/CN114483215B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH488926A (en) * | 1968-05-31 | 1970-04-15 | Konink Machf Stork N V | Turbine for a compressible propellant |
| CA2077841A1 (en) * | 1991-10-30 | 1993-05-01 | Anand D. Narayana | Impeller system for a gas turbine engine |
| CN104832582A (en) * | 2015-03-19 | 2015-08-12 | 柳州市永益机械制造有限公司 | Composite air spring |
| CN205036413U (en) * | 2015-09-24 | 2016-02-17 | 广州广重企业集团有限公司 | Steam turbine speed control mechanism's drive arrangement |
| CN206957770U (en) * | 2017-06-23 | 2018-02-02 | 杭州汽轮机股份有限公司 | A kind of 50MW grades bifurcated flow cogeneration steam turbine |
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| Publication number | Publication date |
|---|---|
| CN114483215B (en) | 2024-04-12 |
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