CN116971843A - Steam seal adjusting system of steam turbine - Google Patents
Steam seal adjusting system of steam turbine Download PDFInfo
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- CN116971843A CN116971843A CN202310873558.XA CN202310873558A CN116971843A CN 116971843 A CN116971843 A CN 116971843A CN 202310873558 A CN202310873558 A CN 202310873558A CN 116971843 A CN116971843 A CN 116971843A
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- air supply
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 63
- 238000001816 cooling Methods 0.000 claims description 27
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 description 11
- 239000003595 mist Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
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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
-
- 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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
-
- 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
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
Abstract
The invention discloses a steam seal adjusting system of a steam turbine, which belongs to the field of steam seal equipment of the steam turbine and comprises an air supply system and a pressure stabilizing system, wherein the air supply system is communicated with the pressure stabilizing system, and one side, close to the air supply system, of the pressure stabilizing system is provided with a throttle orifice plate. The air supply system is used for providing a proper air source for the vapor seal adjusting system, the pressure stabilizing system is mainly used for adjusting the temperature and the air pressure of the air source so as to meet the requirement of vapor seal air supply, the self-sealing system pressure is maintained, the throttling orifice plate between the air supply system and the pressure stabilizing system can keep the minimum heating pipe flow of steam in the air supply main pipe, the steam in the air supply system can pass through the throttling orifice plate and then enter the pressure stabilizing system, the throttling effect of the throttling orifice plate is utilized, on one hand, the steam in the pressure stabilizing system is ensured not to be naturally cooled, the proper air source can be provided for a unit at any moment, on the other hand, the waste of the steam is avoided, and the energy consumption is reduced.
Description
Technical Field
The present invention relates to a gland sealing adjusting system, and more particularly, to a gland sealing adjusting system of a steam turbine.
Background
The steam seal adjustment of the steam turbine means that the steam seal system of the steam turbine is controlled and adjusted so as to ensure the normal operation and sealing effect of the steam seal, the steam seal plays an important role in the steam turbine, can prevent steam leakage, maintain the pressure balance of the system and protect the corrosion and damage of bearings and other key parts, but in the existing steam seal adjustment system, if the steam in a pipeline is not used and does not flow for a long time, the steam seal adjustment system can be naturally cooled, so that the system needs to operate but can not meet the requirement of the air supply temperature of the steam seal.
For example: the proposal of Chinese patent publication No. CN103195521A, publication No. 2013, 7 and 10, the invention discloses a double-machine backheating air extraction steam thermodynamic system, which comprises a big steam turbine, a small steam turbine and a backheating circulation unit, wherein the backheating circulation unit comprises one or more high-pressure heaters and two deaerators.
Disclosure of Invention
The invention solves the problem that the steam in the existing steam sealing system of the steam turbine does not need to be naturally cooled for a long time, and provides the steam sealing adjusting system of the steam turbine.
In order to solve the technical problems, the invention adopts the following technical scheme: a gland seal adjusting system of a steam turbine comprises an air supply system and a pressure stabilizing system, wherein the air supply system is communicated with the pressure stabilizing system, and one side, close to the air supply system, of the pressure stabilizing system is provided with a throttle plate. The air supply system is used for providing a proper air source for the vapor seal adjusting system, the pressure stabilizing system is mainly used for adjusting the temperature and the air pressure of the air source so as to meet the requirement of vapor seal air supply, the self-sealing system pressure is maintained, the throttling orifice plate between the air supply system and the pressure stabilizing system can keep the minimum heating pipe flow of steam in the air supply main pipe, when the unit normally operates or is in an open state, the steam in the air supply system can pass through the throttling orifice plate and then enter the pressure stabilizing system, and the throttling effect of the throttling orifice plate is utilized, so that the steam in the pressure stabilizing system can not be naturally cooled, the proper air source can be quickly provided for the unit at any moment, the waste of the steam is avoided, and the energy consumption is reduced.
Preferably, the air supply system comprises a main steam air supply system and an auxiliary steam air supply system, wherein the main steam air supply system comprises a main steam pipeline, and at least one first valve is arranged on the main steam pipeline. Under the condition of starting or low-load working of the steam turbine, the steam seal air supply is supplied by a main steam air supply system, and water is sprayed into a pressure stabilizing system through a high-temperature water spray temperature reducing component so as to meet the steam seal air supply requirement; if the power plant has an auxiliary air source meeting the requirements, the auxiliary steam air supply system can also provide the air source, and any one of the two air sources meeting the requirements can be used. The main steam air supply system comprises a main steam pipeline for circulating steam, and at least one first valve is arranged on the main steam pipeline and used for switching on and off the conveying of the main steam. The first valve is provided with two or more valves, so that the phenomenon that the first valve with failure cannot be normally opened or closed can be avoided.
Preferably, the auxiliary steam supply system comprises a first branch and a second branch which are connected in parallel, wherein the first branch is provided with a first electric valve, and the second branch is provided with a second valve. The first branch and the second branch of auxiliary steam are used for circulation of auxiliary steam, wherein under the normal working condition, only the first branch is used for circulation of auxiliary steam, the second branch is not used under the normal condition, the first branch is provided with the first electric valve and is mainly used for realizing on-off of the auxiliary steam on the first branch, when the first electric valve breaks down and needs maintenance, the supply of the auxiliary steam can not be disconnected, at the moment, the second valve on the second branch can be opened, and the auxiliary steam is provided for the vapor seal system through the second branch. It should be noted that, a stop valve may be disposed on each side of the first electric valve, and when the stop valves on both sides of the first electric valve are closed, the first electric valve may be maintained without worrying about the steam leakage of the first branch.
Preferably, the cooling system comprises a high-pressure water spray temperature reduction system and a low-pressure water spray temperature reduction system, the pressure stabilizing system comprises a pressure equalizing box, one side of the pressure equalizing box, which is close to the air supply system, is connected with the high-pressure water spray temperature reduction system through a first nozzle, and one side of the pressure equalizing box, which is far away from the air supply system, is connected with the low-pressure water spray temperature reduction system through a second nozzle. The high-pressure water spray temperature reduction system mainly sprays water into the pressure equalizing box so as to meet the requirement of vapor seal air supply, maintains the pressure of the self-sealing system, and the low-pressure water spray temperature reduction system mainly aims at maintaining the air supply temperature of the low-pressure shaft seal and automatically maintains the air supply temperature of the low-pressure vapor seal to be not more than 200 ℃.
Preferably, the overflow device comprises a third branch and a fourth branch which are connected in parallel, the third branch is provided with a second electric valve, and the fourth branch is provided with a third valve. The overflow device is mainly used for overflowing redundant steam in the pressure equalizing box to condensing equipment, condensing the steam into water, maintaining normal steam pressure in the pressure equalizing box, the second electric valve is mainly used for switching on and off the overflow device, when the overflow device is put into operation, the second electric valve is opened to enable the redundant steam to be introduced into the overflow device, then the steam enters the condenser through the overflow device, the steam pressure in the pressure equalizing box is reduced, the third valve on the fourth branch is not opened under the normal condition, and when the second electric valve fails to maintain, the third valve is used for transition.
Preferably, one side, far away from the air supply system, of the pressure stabilizing system is provided with a steam output system, and the steam output system comprises a first output pipeline and a second output pipeline which are arranged on the pressure stabilizing system in parallel and are respectively communicated with the front end steam seal of the steam turbine and the rear end steam seal of the steam turbine. The steam output system provides a front end steam seal and a rear end steam seal for the steam turbine through the first output pipeline and the second output pipeline, prevents steam leakage at the front shaft end and the rear shaft end of the steam turbine, maintains vacuum of the unit, saves energy loss, and effectively prevents water inflow at the front end and the rear end of the steam turbine.
Preferably, the high-pressure water spraying and temperature reducing system comprises a fifth branch and a sixth branch which are connected in parallel, wherein the fifth branch and the sixth branch are respectively communicated with two ends of the first nozzle through flanges, and at least one stop valve is respectively arranged on the fifth branch and the sixth branch. The fifth branch and the sixth branch are high-pressure running water pipelines, high-pressure water is led into the first nozzle, the water sprayed out of the first nozzle plays a role in regulating the temperature of steam in the pressure equalizing box, and the cut-off valve can be opened or closed to realize the on-off of the fifth branch and the sixth branch, so that the work of the high-pressure water spraying and temperature reducing system is controlled.
Preferably, the first nozzle comprises symmetrically arranged nozzle seats, the nozzle seats are respectively provided with a spray pipe, the spray pipes comprise fixing parts and spray opening parts, the spray opening parts are arranged on the side walls of the spray pipes and are provided with a plurality of spray openings, and the spray openings face the pressure stabilizing system. The nozzle holders which are symmetrically arranged correspond to the fifth branch and the sixth branch respectively, and the nozzles are of a small caliber, so that high-pressure water can be sprayed out in a water mist mode, the cooling effect of the water mist is maximized, the temperature in the pressure equalizing box can be quickly reduced, the quick adjustment of the temperature is realized, and the air supply requirement of the vapor seal system is met more quickly.
Preferably, the fixing part is connected to the nozzle seat in an axial sliding manner along the nozzle seat, a shaft sleeve is sleeved outside the nozzle, the shaft sleeve is fixed relative to the nozzle seat, and an elastic piece is arranged between the fixing part and the shaft sleeve. The spray pipe can axially slide relative to the nozzle seat, and when the spray pipe slides on the nozzle seat, the number of the spray nozzles exposed to the outside of the shaft sleeve can be controlled, so that the water spraying quantity of the spray nozzles is controlled, and the temperature adjusting efficiency in the pressure equalizing box is further controlled. When the operation of rapid cooling is needed, the water pressure entering the first nozzle is increased, and after the water pressure is increased, the high-pressure water can push the fixing part of the spray pipe to slide in the nozzle seat, so that the spray ports on the side wall of the spray pipe are exposed out of the shaft sleeve, the number of effective spray ports is increased, the water spraying amount is increased, and the temperature effect in the pressure equalizing box is achieved; when the temperature is reduced and controlled, the water pressure entering the first nozzle is reduced, after the water pressure is reduced, the spray pipe is reset under the action of the elastic piece, part of spray ports are sealed in the shaft sleeve again, the number of effective spray ports is reduced, so that the water spraying amount is reduced, and the temperature stabilization or the temperature rising operation is realized; the temperature and the air pressure in the pressure equalizing box can be quickly adjusted through the operation, so that different air sources can be quickly satisfied and supplied to the steam turbine.
Preferably, the interior of the spray pipe is of an internal thread structure. The inside of spray tube is set up to the internal thread, after the inside flowing water that lets in of spray tube, flowing water can receive the resistance of screw thread at the screw thread internal flow, and flowing water plays a reaction force to the screw thread simultaneously for the spray tube takes place to rotate, thereby makes the spout can rotate round spray tube circumference, realizes rotatory water spray's effect, carries out the water spray fog operation to pressure equalizing box direction and air feed system direction, makes the temperature evenly drop, and the cooling region is bigger.
Compared with the prior art, the invention has the beneficial effects that: (1) The steam in the pipeline can be prevented from being naturally cooled without being used and flowing for a long time, and the requirement of the steam seal air supply temperature can be rapidly met; (2) The condition of steam leakage at the front end and the rear end of the steam turbine can be effectively prevented, the vacuum of the unit is maintained, and energy is saved; (3) The sealing performance is better, water inflow at the front and rear shaft ends of the steam turbine can be effectively prevented, lubricating oil inflow is avoided, and the safe operation of the steam turbine is endangered by oil emulsification; (4) The temperature regulation in the pressure equalizing box can be realized rapidly, and the requirements of different air supply and air source parameters are met.
Drawings
Fig. 1 is a schematic view of a part of the front view of the present invention.
FIG. 2 is a schematic diagram of an air supply system according to the present invention.
Fig. 3 is a schematic view of a part of the structure of the top view of the present invention.
Fig. 4 is a schematic diagram of the overflow device in the direction a in fig. 3.
Fig. 5 is a schematic view of a first nozzle according to embodiment 2 of the present invention.
Fig. 6 is an enlarged view of B in fig. 5.
Fig. 7 is an enlarged view of C in fig. 5.
Fig. 8 is a schematic diagram of example 3.
In the figure: 1. the system includes a gas supply system, 2 a pressure stabilizing system, 3 a throttle orifice, 4 a primary steam supply system, 5 a secondary steam supply system, 6 a primary steam pipe, 7 a first valve, 8 a first branch, 9 a second branch, 10 a second electrically operated valve, 11 a second valve, 12 a cooling system, 13 a high pressure water reducing system, 14 a low pressure water reducing system, 15 a pressure equalizing tank, 16 a first nozzle, 17 a second nozzle, 18 a relief orifice, 19 a third branch, 20 a fourth branch, 21a second electrically operated valve, 22 a third valve, 23 a first output conduit, 24 a second output conduit, 25 a fifth branch, 26 a sixth branch, 27 a flange, 28 a shut-off valve, 29 a nozzle mount, 30 a spray pipe, 31 a fixed portion, 32 a spray orifice, 33 a spray orifice, 34 a sleeve, 35 a resilient member, 36 an internal thread, 37 a first instrument assembly, 38 a second instrument assembly, 39 a filter, 40 a shut-off valve.
Detailed Description
The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings.
Example 1: the steam seal adjusting system of the steam turbine shown in fig. 1 to 4 comprises a gas supply system 1, a pressure stabilizing system 2 and a cooling system 12, wherein the gas supply system 1 is communicated with the pressure stabilizing system 2, the cooling system 12 is communicated with the pressure stabilizing system 2, the pressure stabilizing system 2 is mainly of a pressure equalizing box 15 structure, the gas supply system 1 comprises a main steam gas supply system 4 and an auxiliary steam gas supply system 5, a throttle plate 3 is arranged between the gas supply system 1 and the pressure stabilizing system 2, the throttle plate 3 is positioned at one end, close to the gas supply system 1, of the pressure stabilizing system 2, steam in the main steam gas supply system 4 and the auxiliary steam gas supply system 5 can enter the pressure stabilizing system 2 through the throttle plate 3, the throttle plate 3 can keep the minimum heating pipe flow of steam in a gas supply main pipe by utilizing the throttling effect of the throttle plate 3, on one hand, the steam in the pressure stabilizing system 2 can not be naturally cooled, a proper gas source can be rapidly provided for a unit at any moment, on the other hand, the waste of the steam is avoided, and the energy consumption is reduced.
The main steam air supply system 4 comprises a main steam pipeline 6, two first valves 7 are arranged on the main steam pipeline 6, when the steam turbine is started or is in low load, the steam seal adjusting system is internally provided with an air source by the main steam air supply system 4, the first valves 7 are used for controlling the on-off of the main steam air supply system 4, and the first valves 7 are arranged in two ways to prevent the air leakage phenomenon caused by valve failure. The auxiliary steam supply system 5 comprises a first branch 8 and a second branch 9, the first branch 8 and the second branch 9 are connected in parallel, a first electric valve 10 and two stop valves 40 are arranged on the first branch 8, the two stop valves 40 are respectively located on two sides of the first electric valve 10, a second valve 11 is arranged on the second branch 9, the first branch 8 and the second branch 9 are both used for circulation of auxiliary steam, under normal working conditions, only the first branch 8 is used for circulation of auxiliary steam, the second branch 9 is not used under normal conditions, the first branch 8 is provided with the first electric valve 10, and the first electric valve 8 is mainly used for realizing on-off of the auxiliary steam on the first branch 8, when the first electric valve 10 fails and needs maintenance, the second valve 11 on the second branch 9 can be opened, and the second branch 9 can be used for supplying auxiliary steam to the steam seal system. It should be noted that, by providing one stop valve 40 on each side of the first electrically operated valve 10 and closing the stop valves 40 on each side of the first electrically operated valve 10, the first electrically operated valve 10 can be maintained without worrying about the occurrence of steam leakage in the first branch 8.
The cooling system 12 comprises a high-pressure spray cooling system 13 and a low-pressure spray cooling system 14, the high-pressure spray cooling system 13 is connected with a pressure equalizing box 15 of the pressure stabilizing system 2, the joint is close to one side of the air supply system 1, a first nozzle 16 is arranged at the joint of the high-pressure spray cooling system 13 and the pressure stabilizing system 2, high-pressure spray cooling system 13 sprays high-pressure water into the pressure stabilizing system 2 through the first nozzle 16, the cooling effect is realized, the steam seal air supply requirement is met, and the pressure of the self-sealing system is maintained; the low-pressure spray cooling system 14 is communicated with the tail part of the pressure stabilizing system 2, namely the joint of the low-pressure spray cooling system 14 and the pressure stabilizing system 2 is positioned at one side of the pressure equalizing box 15 far away from the air supply system 1, a second nozzle 17 is arranged at the joint of the low-pressure spray cooling system 14 and the pressure stabilizing system, water flow with smaller temperature and pressure is provided for the pressure equalizing box 15 through the second nozzle 17 by the low-pressure spray cooling system 14, the low-pressure shaft seal air supply temperature is maintained, and the low-pressure steam seal air supply temperature is automatically maintained to be not more than 200 ℃.
In actual production, the temperature of the vapor gas introduced into the main vapor gas supply system 4 is 535 ℃, the pressure is 8.83-9.8 MPa, and the temperature of the vapor gas introduced into the auxiliary vapor gas supply system 5 is 500 ℃, the pressure is 0.6MPa, and the normal pressure of the system is 0.103-0.15 MPa, so that high-pressure vapor needs to be treated to maintain the normal pressure. The pressure stabilizing system 2 is also provided with an overflow device 18, the overflow device 18 comprises a third branch 19 and a fourth branch 20, the third branch 19 and the fourth branch 20 are connected in parallel, the third branch 19 is provided with a second electric valve 21 and two stop valves 40, and the fourth branch 20 is provided with a third valve 22; the overflow device 18 is mainly used for overflowing the redundant steam in the pressure equalizing box 15 to condensing equipment, condensing the steam into water, maintaining the normal steam pressure in the pressure equalizing box 15, the second electric valve 21 is mainly used for switching on and off the overflow device 18, when the overflow device 18 is put into operation, the second electric valve 21 is opened to enable the redundant high-temperature high-pressure steam to be introduced into the overflow device 18, then the steam enters the condenser through the overflow device 18, the steam pressure in the pressure equalizing box 15 is reduced, the third valve 22 on the fourth branch 20 is not opened under the same condition, and when the second electric valve 21 is in fault maintenance, the third valve 22 is used for transition. When the steam turbine is under high load, the high-pressure steam seal leaks steam to supply steam to the low-pressure steam seal, and the steam flow is enough to meet the sealing requirement of the low-pressure steam seal.
The high-pressure water spraying and temperature reducing system 13 further comprises a fifth branch 25 and a sixth branch 26, the fifth branch 25 and the sixth branch 26 are connected in parallel, the fifth branch 25 is fixedly connected with one end of the first nozzle 16 through a flange 27, the sixth branch 26 is fixedly connected with the other end of the first nozzle 16 through the flange 27, and at least one stop valve 28 for switching on and switching off the fifth branch 25 and the sixth branch 26 is further arranged on the fifth branch 25 and the sixth branch 26. The fifth branch 25 and the sixth branch 26 are high-pressure running water pipelines, high-pressure water is led into the first nozzle 16, the water sprayed out from the first nozzle 16 plays a role in regulating the temperature of steam in the pressure equalizing box 15, and the cut-off valve 28 can be opened or closed to realize the on-off of the fifth branch 25 and the sixth branch 26, so that the work of the high-pressure water spraying and temperature reducing system 13 is controlled.
The one end that air feed system 1 was kept away from at steady voltage system 2 still is provided with steam output system, and steam output system includes first output pipeline 23 and second output pipeline 24, and first output pipeline 23 and second output pipeline 24 are respectively through the air feed interface connection of pipe with steam turbine high pressure gland and low pressure gland, and after the processing of steady voltage system 2, the steam satisfies the air supply demand of steam turbine, can carry out the air feed through first output pipeline 23 and second output pipeline 24. The steam leakage of the front shaft end and the rear shaft end of the steam turbine is effectively prevented, the vacuum of the unit is maintained, the energy loss is saved, the water inflow of the front end and the rear end of the steam turbine is effectively prevented, the steam of the front shaft end of the steam turbine is led into the front bearing box to cause the water inflow in the lubricating oil, and the safety operation of the steam turbine is prevented from being endangered by oil emulsification.
The pressure equalizing box 15 is further provided with a first instrument assembly 37, the first instrument assembly 37 comprises a thermocouple, a thermometer, a pressure gauge and the like and is used for detecting various parameters of water vapor in the pressure equalizing box 15 in real time, meanwhile, the first output pipeline 23 and the second output pipeline 24 of the vapor output system are also provided with a second instrument assembly 38 and a filter 39, the second instrument assembly 38 is used for detecting whether various parameters of output vapor meet requirements, and the filter 39 can prevent impurities from entering a shaft seal of the turbine.
Example 2: the steam seal adjusting system of a steam turbine as shown in fig. 1 to 7 differs from embodiment 1 only in that the first nozzle 16 is symmetrically provided with nozzle holders 29, two nozzle holders 29 are respectively provided with a nozzle 30, the nozzle 30 includes a fixed portion 31 and a nozzle portion 32, two nozzle openings 33 are provided on the side wall of the nozzle portion 32, the nozzle openings 33 are arranged in an axial direction of the nozzle 30, and the nozzle openings 33 are directed toward the pressure stabilizing system 2; the fixing portion 31 of the nozzle 30 is slidably connected in the nozzle seat 29, and a sleeve 34 is sleeved outside the nozzle 30, one end of the sleeve 34 is a fixing end, the sleeve is embedded between the nozzle seat 29 and the main body of the first nozzle 16, and an elastic member 35 is arranged between the fixing portion 31 and the fixing end of the sleeve 34.
The symmetrically arranged nozzle holders 29 respectively correspond to the fifth branch 25 and the sixth branch 26, and the nozzle 33 is of a small caliber, so that high-pressure water can be sprayed out in a water mist form, the cooling effect of the water mist is maximized, the temperature in the pressure equalizing box 15 can be quickly reduced, the quick adjustment of the temperature is realized, and the air supply requirement of the vapor seal system is more quickly met. The spout 30 is axially slidable relative to the nozzle holder 29, and when the spout 30 slides on the nozzle holder 29, the number of spouts 33 exposed to the outside of the sleeve 34 can be controlled, thereby controlling the amount of water sprayed from the spouts 33, and further controlling the efficiency of temperature regulation within the pressure equalizing tank 15. When the operation of rapid cooling is needed, the water pressure entering the first nozzle 16 is increased, and after the water pressure is increased, the high-pressure water pushes the fixing part 31 of the spray pipe 30 to slide in the nozzle seat 29, so that the spray ports 33 on the side wall of the spray pipe 30 are exposed out of the shaft sleeve 34, the number of the effective spray ports 33 is increased, the water spraying amount is increased, and the effect of rapidly reducing the temperature in the pressure equalizing box 15 is achieved; when the temperature is reduced and controlled, the water pressure entering the first nozzle 16 is reduced, after the water pressure is reduced, the spray pipe 30 is reset under the action of the elastic piece 35, part of the spray ports 30 are sealed in the shaft sleeve 34 again, the number of the effective spray ports 33 is reduced, so that the water spraying amount is reduced, and the temperature stabilization or the temperature rising operation is realized; the temperature and the air pressure in the pressure equalizing box 15 can be quickly adjusted through the operation so as to quickly meet the requirements of different air sources to be supplied to the steam turbine.
The ventilation caliber of the flange 27 is larger than that of the fixing part 31 of the spray pipe 30, so that the part of the fixing part 31 at the opening of the flange 27 can bear the pressure of steam, the stress effect of the spray pipe is improved, and the movement of the spray pipe 30 is better controlled. And the joint between the flange 27 and the nozzle seat 29 needs to be provided with a sealing ring for sealing, so that steam leakage is prevented.
Example 3: a steam seal adjusting system of a steam turbine as shown in fig. 1 to 8 is different from embodiment 2 only in that the inside of the nozzle 30 is an internal thread 36 structure.
After flowing water is introduced into the spray pipe 30, flowing water flows in the internal threads 36 and is subjected to resistance of the internal threads 36, meanwhile, flowing water reacts to the internal threads 36, so that the spray pipe 30 rotates, the spray nozzle 33 can rotate around the circumference of the spray pipe 30, the effect of rotating water spraying is achieved, water spraying mist operation is carried out on the direction of the pressure equalizing box 15 and the direction of the air supply system 1, the temperature is evenly reduced, and the cooling area is larger.
Wherein, in order to guarantee that spray tube 30 can rotate in axle sleeve 34, can freely rotate and be clearance fit between axle sleeve 34 and the spray tube 30 to need set up the connection baffle between elastic component 35 and the fixed part 31 of spray tube 30, when preventing spray tube 30 rotation, drive elastic component 35 and rotate together, lead to elastic component 35 tensile damage, the frictional force between connection baffle and the fixed part 31 is as little as possible, is favorable to the rotation of spray tube 30 on the one hand, on the other hand can not exert great shearing force for elastic component 35. At the same time, the fixing part 31 of the spray pipe 30 is in clearance fit with the nozzle seat 29, so that the spray pipe 30 cannot rotate due to too large friction force between the fixing part and the nozzle seat.
Claims (10)
1. The steam seal adjusting system of the steam turbine is characterized by comprising an air supply system and a pressure stabilizing system, wherein the air supply system is communicated with the pressure stabilizing system, and one side, close to the air supply system, of the pressure stabilizing system is provided with a throttle plate.
2. The steam seal conditioning system of a steam turbine of claim 1, wherein the gas supply system comprises a main steam supply system and an auxiliary steam supply system, the main steam supply system comprising a main steam line having at least a first valve disposed thereon.
3. The steam seal adjusting system of a steam turbine according to claim 2, wherein the auxiliary steam supply system comprises a first branch and a second branch connected in parallel, the first branch is provided with a first electric valve, and the second branch is provided with a second valve.
4. The steam seal adjusting system of a steam turbine according to claim 1, further comprising a cooling system, wherein the cooling system comprises a high-pressure spray cooling system and a low-pressure spray cooling system, the pressure stabilizing system comprises a pressure equalizing box, one side of the pressure equalizing box, which is close to the air supply system, is connected with the high-pressure spray cooling system through a first nozzle, and one side of the pressure equalizing box, which is far away from the air supply system, is connected with the low-pressure spray cooling system through a second nozzle.
5. The steam seal adjusting system of a steam turbine according to any one of claims 1 to 4, further comprising an overflow device, wherein the overflow device comprises a third branch and a fourth branch which are connected in parallel, the third branch is provided with a second electric valve, and the fourth branch is provided with a third valve.
6. The steam seal adjusting system of a steam turbine according to any one of claims 1 to 4, wherein a steam output system is arranged on a side, away from the air supply system, of the pressure stabilizing system, and the steam output system comprises a first output pipeline and a second output pipeline which are arranged on the pressure stabilizing system in parallel and are respectively communicated with a front steam seal of the steam turbine and a rear steam seal of the steam turbine.
7. The steam seal adjusting system of a steam turbine according to claim 4, wherein the high-pressure spray water temperature reducing system comprises a fifth branch and a sixth branch which are connected in parallel, the fifth branch and the sixth branch are respectively communicated with two ends of the first nozzle through flanges, and at least one stop valve is respectively arranged on the fifth branch and the sixth branch.
8. The steam seal adjusting system of a steam turbine according to claim 7, wherein the first nozzle comprises symmetrically arranged nozzle holders, the nozzle holders are respectively provided with a spray pipe, the spray pipe comprises a fixing part and a spray opening part, the spray opening part is arranged on the side wall of the spray pipe and provided with a plurality of spray openings, and the spray openings face the pressure stabilizing system.
9. The steam seal adjusting system of a steam turbine according to claim 8, wherein the fixing portion is slidably connected to the nozzle holder along an axial direction of the nozzle holder, a sleeve is sleeved outside the nozzle, the sleeve is fixed relative to the nozzle holder, and an elastic member is disposed between the fixing portion and the sleeve.
10. A gland sealing and adjusting system of a steam turbine according to claim 8 or 9, wherein the inner part of the nozzle is of an internal thread structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310873558.XA CN116971843A (en) | 2023-07-17 | 2023-07-17 | Steam seal adjusting system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310873558.XA CN116971843A (en) | 2023-07-17 | 2023-07-17 | Steam seal adjusting system of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116971843A true CN116971843A (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310873558.XA Pending CN116971843A (en) | 2023-07-17 | 2023-07-17 | Steam seal adjusting system of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116971843A (en) |
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2023
- 2023-07-17 CN CN202310873558.XA patent/CN116971843A/en active Pending
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