CN220599878U - Air seal device with adjustable throttle - Google Patents
Air seal device with adjustable throttle Download PDFInfo
- Publication number
- CN220599878U CN220599878U CN202321868740.8U CN202321868740U CN220599878U CN 220599878 U CN220599878 U CN 220599878U CN 202321868740 U CN202321868740 U CN 202321868740U CN 220599878 U CN220599878 U CN 220599878U
- Authority
- CN
- China
- Prior art keywords
- pressure
- air
- supply system
- stabilizing cylinder
- air supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000007921 spray Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model provides an air seal device with an adjustable throttle, which comprises a pressure stabilizing cylinder, wherein the pressure stabilizing cylinder is fixedly connected with a high-pressure nozzle; the high-pressure nozzle head is connected with a main air supply system; one end, close to the head, of the side wall of the high-pressure nozzle is connected with an auxiliary air supply system; one end, close to the tail part, of the side wall of the high-pressure nozzle is connected with a high-pressure water spraying temperature reducing system; and a throttle plate capable of providing the minimum heating pipe flow is arranged between the auxiliary air supply system and the high-pressure water spray temperature reduction system. The throttle plate can enable the gas of the main steam flow channel to reach the minimum heating pipe flow rate when not in use, ensures a certain pre-starting temperature, and can prevent the condition that the temperature can not reach the steam seal requirement when in starting.
Description
Technical Field
The utility model relates to the technical field of steam turbines, in particular to a gas seal device with an adjustable throttle.
Background
A steam turbine is a thermal energy machine that uses thermal energy generated by combustion of fuel to drive a turbine to rotate and thereby produce work. Steam turbines are typically composed of a compressor, a combustor, a turbine, and a motorized component. The compressor compresses air, the combustor combusts fuel to produce high temperature and high pressure gas, and then the gas rotates through a turbine, and the movement of the turbine drives other mechanical equipment to work, such as a generator or a propulsion device. The steam turbine is widely applied to the fields of power plants, ships, airplanes, industrial production and the like, and is one of the most commonly used heat energy conversion equipment at present.
The air sealing device is arranged between the movable part and the static part of the steam turbine, and is used for reducing or preventing steam from leaking out and air at the vacuum side from leaking in. The air sealing device is usually connected with a pressure relief pipeline in a pressure stabilizing cylinder body in an external connection mode so as to achieve the purpose of preventing steam from leaking.
For example, patent document CN210858819U discloses a gas seal device for a turbine shaft and a turbine, the gas seal device for a turbine shaft comprising a sealing body, a pressure chamber provided in the sealing body, a partition plate provided vertically in the pressure chamber to divide the pressure chamber into two mutually independent parts, a conduit provided on the sealing body and communicating with one part of the pressure chamber, and a pressure release valve provided on the sealing body and communicating with the other part of the pressure chamber. The sealing body is provided with a connecting flange, and the bottom surface of the connecting flange and the bottom surface of the sealing body are positioned in the same plane. The sealing body is provided with a baffle plate, and the baffle plate is positioned on a pressure relief path of the pressure relief valve. The steam turbine comprises the steam turbine shaft gas sealing device. The utility model has the technical effects of simple structure and convenient use.
However, in the actual use process, the steam in the main steam supply flow channel is static and motionless when the steam turbine is not in use, so that the steam in the cylinder is gradually cooled, and the problems of accumulated water and poor air sealing effect caused by insufficient temperature when the steam turbine is started are caused.
Disclosure of Invention
The utility model provides a gas seal device with an adjustable throttle, which aims to solve the problems that in the prior art, the existing structure is static due to steam in a main steam supply flow channel when a steam turbine is not used in the actual use process, so that the steam in a cylinder is gradually cooled, water accumulation occurs, and the gas seal effect is poor due to insufficient temperature when the steam turbine is started.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the air sealing device with the adjustable throttle is characterized by comprising a pressure stabilizing cylinder, wherein the pressure stabilizing cylinder is fixedly connected with a high-pressure nozzle; the high-pressure nozzle head is connected with a main air supply system; one end, close to the head, of the side wall of the high-pressure nozzle is connected with an auxiliary air supply system; one end, close to the tail part, of the side wall of the high-pressure nozzle is connected with a high-pressure water spraying temperature reducing system; an adjustable restrictor capable of providing minimum heating pipe flow is arranged between the auxiliary air supply system and the high-pressure water spray temperature reduction system. The adjustable flow device can enable the gas of the main steam flow channel to reach the minimum heating pipe flow rate when not in use, ensures certain pre-starting temperature, and can prevent the condition that the temperature can not reach the air seal requirement when in starting.
Preferably, the adjustable throttle is provided with a plurality of through holes; one side edge of the adjustable throttle is connected to the high-pressure nozzle through a rotating shaft. The through holes on the adjustable flow regulator ensure the minimum inflow of gas, and the rotating shaft can enable the adjustable flow regulator to rotate to the vertical direction when the steam turbine operates, so that the main steam flow passage can smoothly flow.
Preferably, the high-pressure water spraying and temperature reducing system is connected with the high-pressure nozzle through two pipelines symmetrically arranged on the side wall of the high-pressure nozzle; the air inlets of the high-pressure water spray temperature reducing system and the auxiliary air supply system are mutually perpendicular. This arrangement allows for better contact of the high pressure water with the gas.
Preferably, the pressure stabilizing cylinder is erected on two supporting frames; one end of the pressure stabilizing cylinder, which is connected with the high-temperature nozzle, is conical; the pressure stabilizing cylinder and the high-temperature nozzle are fixedly connected through a flange plate. The support frame is used for fixing the pressure stabilizing cylinder, and the front end of the pressure stabilizing cylinder is conical, so that the disturbance is larger when gas enters the pressure stabilizing cylinder from the nozzle, and the air pressure and the temperature are distributed more uniformly.
Preferably, one side of the pressure stabilizing cylinder far away from the support frame is respectively connected with a front air seal air supply system and a rear air seal air supply system through two pipelines; the rear gas seal air supply system is provided with a device for detecting the air pressure in the pipe. The front gas seal air supply system and the rear gas seal air supply system provide sealing gas with proper temperature and pressure for the steam turbine, and the detection device can conveniently regulate and control the pressure of the gas.
Preferably, Y-shaped structures are arranged at the air outlets of the front air seal air supply system and the rear air seal air supply system; and an air outlet valve is arranged on the end face of the pressure stabilizing cylinder, which is far away from one end of the high-pressure nozzle. The Y-shaped structure can prevent the back flow of the steam, and the air outlet valve can adjust and discharge redundant waste steam.
Preferably, the high-pressure water spray temperature reduction system is connected with a low-pressure water spray temperature reduction system to form a bridge-shaped passage; the other end of the low-pressure water spray temperature reducing system is connected to the side wall of one end, far away from the high-pressure nozzle, of the pressure stabilizing cylinder; a water inlet pipeline is arranged between the high-pressure water spray temperature reduction system and the low-pressure water spray temperature reduction system. The water spray system can play a role in regulating pressure and temperature.
Preferably, one side of the side wall of the pressure stabilizing cylinder, which is far away from the high-pressure water spraying temperature reduction system, is connected with an overpressure overflow system. Excess leakage steam can overflow to the condenser through the overpressure overflow system so as to maintain the pressure of the gas seal system.
Preferably, a drain valve is arranged on one side of the side wall of the pressure stabilizing cylinder, which is close to the supporting frame. The drain valve can drain the water condensed in the pressure stabilizing cylinder out of the pressure stabilizing cylinder, so that the problem of accumulated water is prevented.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a gas seal device with an adjustable throttle, which solves the problems that in the prior art, the existing structure is static in the actual use process because the steam in a main steam supply flow channel is not used by a steam turbine, so that the steam in a cylinder is gradually cooled, water accumulation occurs, and the gas seal effect is poor because of insufficient temperature when the steam turbine is started.
Drawings
Fig. 1 is a front view of a gas seal structure of the present utility model.
Fig. 2 is a top view of the gas seal structure of the present utility model.
Fig. 3 is a schematic diagram of the overpressure overflow system of the present utility model.
Fig. 4 is a cross-sectional view of the high pressure nozzle of the present utility model.
Fig. 5 is a front view of the adjustable throttle of the present utility model.
In the figure: 1. a pressure stabilizing cylinder; 2. a high pressure nozzle; 3. a main air supply system; 4. an auxiliary air supply system; 5. a front air seal air supply system; 6. a rear air seal air supply system; 7. an air outlet valve; 8. a support frame; 9. a drain valve; 10. an overpressure overflow system; 11. a high pressure spray water temperature reducing system; 12. a low pressure spray attemperation system; 13. an adjustable throttle.
Detailed Description
The following describes a specific embodiment of the technical scheme of the present utility model by way of examples and with reference to the accompanying drawings.
Referring to fig. 1-5, an embodiment of the present utility model is provided:
an air seal device with an adjustable throttle comprises a pressure stabilizing cylinder 1, wherein the pressure stabilizing cylinder 1 is fixedly connected with a high-pressure nozzle 2; the head of the high-pressure nozzle 2 is connected with a main air supply system 3; one end, close to the head, of the side wall of the high-pressure nozzle 2 is connected with an auxiliary air supply system 4; one end, close to the tail part, of the side wall of the high-pressure nozzle 2 is connected with a high-pressure water spraying temperature reducing system 11; an adjustable restrictor 13 is arranged between the auxiliary air supply system 4 and the high-pressure water spray temperature reducing system 11, water vapor in the main air supply system 3 and the auxiliary air supply system 4 can enter the pressure stabilizing cylinder 1 through the adjustable restrictor 13, and the minimum heating pipe flow can be provided by utilizing the throttling effect of the adjustable restrictor 13. The adjustable flow device 13 can enable the gas in the main steam flow channel 3 to reach the minimum heating pipe flow rate when not in use, ensures a certain pre-starting temperature, and can prevent the condition that the temperature can not reach the air seal requirement when in starting. On the other hand, steam losses are avoided.
The adjustable throttle 13 is provided with a plurality of through holes; one side of the adjustable throttle 13 is connected to the high-pressure nozzle 2 via a rotary shaft. The through holes on the adjustable restrictor 13 ensure a minimum inflow of gas, and at the same time, turbulence is generated through the through holes, so that the gas flows more uniformly in the pressure stabilizing cylinder 1. The axis of rotation can make when the steam turbine operates with adjustable flow ware 13 change vertical direction, makes main steam flow way air current pass through smoothly, and vertical adjustable flow ware 13 divides into two parts with the inside air current that flows through of high pressure nozzle 2 simultaneously, when these two parts air current passed through, can make the gas between two runners exchange gas through the hole on adjustable flow ware 13 because of the atmospheric pressure velocity of flow influence for the distribution of main air current in surge tank 1 is more even, the condition that the inside temperature of gas is inhomogeneous can not appear.
The high-pressure spray water temperature reducing system 11 is connected with the high-pressure nozzle 2 through two pipelines symmetrically arranged on the side wall of the high-pressure nozzle 2; the air inlets of the high-pressure water spray temperature reducing system 11 and the auxiliary air supply system 3 are perpendicular to each other. The pressure stabilizing cylinder 1 is erected on two supporting frames 8; one end of the pressure stabilizing cylinder 1 connected with the high-temperature nozzle 2 is conical; the pressure stabilizing cylinder 1 and the high-temperature nozzle 2 are fixedly connected through a flange plate. The taper can improve the pressure of the gas in the high-pressure nozzle 2, so that the pressure is conveniently increased, the flange expands outwards, and the flange is fixed by bolts, so that the gas leakage can be effectively prevented.
One side of the pressure stabilizing cylinder 1 far away from the supporting frame 8 is respectively connected with a front air seal air supply system 5 and a rear air seal air supply system 6 through two pipelines; the rear air seal air supply system 6 is provided with a device for detecting the air pressure in the pipe. Y-shaped structures are arranged at the air outlets of the front air seal air supply system 5 and the rear air seal air supply system 6; the end face of the pressure stabilizing cylinder 1, which is far away from one end of the high-pressure nozzle 2, is provided with an air outlet valve 7. The front gas seal air supply system 5 and the rear gas seal air supply system 6 provide sealing gas with proper temperature and pressure for the steam turbine, and the detection device is placed in the pressure stabilizing cylinder 1 and the air outlet pipeline, so that the gas in the system can be monitored in real time, and the pressure of the gas can be conveniently regulated and controlled.
The high-pressure spray cooling system 11 is connected with a low-pressure spray cooling system 12 to form a bridge-shaped passage; the other end of the low-pressure spray water temperature reducing system 12 is connected to the side wall of one end of the pressure stabilizing cylinder 1, which is far away from the high-pressure nozzle 2; a water inlet pipeline is arranged between the high-pressure water spray temperature reducing system 11 and the low-pressure water spray temperature reducing system 12. And one side, far away from the high-pressure water spray temperature reduction system 11, of the side wall of the pressure stabilizing cylinder 1 is connected with an overpressure overflow system 10. One side of the side wall of the pressure stabilizing cylinder 1, which is close to the supporting frame 8, is provided with a drain valve 9. The high-pressure water spray temperature reduction system 11 and the low-pressure water spray temperature reduction system 12 are used for carrying out pressurization and temperature reduction treatment on gas, and when the pressure exceeds the standard, the overpressure overflow system 10 is operated to overflow the redundant air leakage to the condenser through the overpressure overflow system so as to maintain the pressure of the gas seal system. Meanwhile, the low-pressure water spraying and temperature reducing system 12 is used for cooling the gas, and water condensed in the pressure stabilizing cylinder 1 after cooling can be discharged out of the pressure stabilizing cylinder 1 through the drain valve 9, so that the occurrence of the problem of water accumulation is prevented.
The adjustable throttle 13 is fixed in the high-pressure nozzle 2 by a spindle, and can be fine-tuned by the detected data for adjusting the intake speed. The spindle may control the adjustable flow means 13 to rotate through a ninety degree angle. When the system is in an unoperated state, the adjustable throttle 13 is in a closed state and the inner diameter of the high-pressure nozzle 2 is closed, steam enters the pressure stabilizing cylinder 1 through the through hole on the adjustable throttle 13, so that the minimum heating pipe flow of the gas in the pressure stabilizing cylinder 1 is maintained, the gas in the pressure stabilizing cylinder 1 is maintained at a certain temperature, and when the system is used, the temperature is close to a required temperature range, thereby facilitating the rapid and stable operation of a machine. When the adjustable flow device 13 works, the adjustable flow device 13 is switched to an open state, at the moment, the adjustable flow device 13 is positioned at the middle position of the high-pressure nozzle 2, a pipeline in the high-pressure nozzle 2 is divided into two channels, when high-pressure steam passes through the channels, the fast-flowing steam is divided into two air flows through the adjustable flow device 13, the two air flows are mutually disturbed to generate vortex, so that the temperature and the pressure in the pressure stabilizing cylinder 1 can be fast and uniformly reached to a preset value when the air flows to the pressure stabilizing cylinder 1, and the device can fast and stably operate.
In addition to the above embodiments, the technical features or technical data of the present utility model may be rearranged and combined within the scope of the claims and the description of the present utility model to constitute new embodiments, which may be implemented without inventive effort by those skilled in the art, and thus, embodiments of the present utility model not described in detail should be considered as embodiments of the present utility model within the scope of the protection of the present utility model.
Claims (9)
1. An air seal apparatus with an adjustable restrictor, comprising:
the pressure stabilizing cylinder (1), the said pressure stabilizing cylinder (1) is fixedly connected with high-pressure nozzle (2);
the head of the high-pressure nozzle (2) is connected with a main air supply system (3);
one end, close to the head, of the side wall of the high-pressure nozzle (2) is connected with an auxiliary air supply system (4);
one end, close to the tail part, of the side wall of the high-pressure nozzle (2) is connected with a high-pressure water spraying temperature reducing system (11);
an adjustable restrictor (13) capable of providing the minimum heating pipe flow is arranged between the auxiliary air supply system (4) and the high-pressure water spray temperature reduction system (11).
2. The air seal device with the adjustable throttle device according to claim 1, characterized in that a plurality of through holes are arranged on the adjustable throttle device (13); one side edge of the adjustable throttle (13) is connected to the high-pressure nozzle (2) through a rotating shaft.
3. The air seal device with the adjustable throttle as claimed in claim 1, wherein the high-pressure water spray temperature reducing system (11) is connected with the high-pressure nozzle (2) through two pipelines symmetrically arranged on the side wall of the high-pressure nozzle (2); the air inlets of the high-pressure water spray temperature reducing system (11) and the auxiliary air supply system (4) are mutually perpendicular.
4. The air seal device with the adjustable throttle as claimed in claim 1, wherein the pressure stabilizing cylinder (1) is erected on two supporting frames (8); one end of the pressure stabilizing cylinder (1) connected with the high-pressure nozzle (2) is conical; the pressure stabilizing cylinder (1) and the high-pressure nozzle (2) are fixedly connected through a flange plate.
5. The air seal device with the adjustable throttle device according to claim 1, wherein one side of the pressure stabilizing cylinder (1) far away from the supporting frame (8) is respectively connected with a front air seal air supply system (5) and a rear air seal air supply system (6) through two pipelines; the rear air seal air supply system (6) is provided with a device for detecting the air pressure in the pipe.
6. The air seal device with the adjustable throttle device according to claim 5, wherein Y-shaped structures are arranged at air outlets of the front air seal air supply system (5) and the rear air seal air supply system (6); an air outlet valve (7) is arranged on the end face of the pressure stabilizing cylinder (1) far away from one end of the high-pressure nozzle (2).
7. A gas seal with adjustable throttle as claimed in claim 1, wherein the high pressure spray attemperation system (11) is connected to a low pressure spray attemperation system (12) to form a bridge-shaped path; the other end of the low-pressure water spray temperature reducing system (12) is connected to the side wall of one end, far away from the high-pressure nozzle (2), of the pressure stabilizing cylinder (1); a water inlet pipeline is arranged between the high-pressure water spray temperature reduction system (11) and the low-pressure water spray temperature reduction system (12).
8. The air seal device with the adjustable throttle as claimed in claim 1, wherein one side of the side wall of the pressure stabilizing cylinder (1) far away from the high-pressure water spray temperature reducing system (11) is connected with an overpressure overflow system (10).
9. An air seal device with an adjustable throttle according to any one of claims 1 to 8, characterized in that a drain valve (9) is provided on the side of the side wall of the pressure stabilizing cylinder (1) close to the support frame (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321868740.8U CN220599878U (en) | 2023-07-17 | 2023-07-17 | Air seal device with adjustable throttle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321868740.8U CN220599878U (en) | 2023-07-17 | 2023-07-17 | Air seal device with adjustable throttle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220599878U true CN220599878U (en) | 2024-03-15 |
Family
ID=90172396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321868740.8U Active CN220599878U (en) | 2023-07-17 | 2023-07-17 | Air seal device with adjustable throttle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220599878U (en) |
-
2023
- 2023-07-17 CN CN202321868740.8U patent/CN220599878U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110671162B (en) | Steam pressure matcher and control method thereof | |
| CN107956519B (en) | Water spraying system for rear cylinder of low-pressure cylinder of steam turbine and adjusting method | |
| CN116067610B (en) | Cold and hot air flow mixing device capable of adjusting air flow temperature in wide range under low Mach number | |
| CN220599878U (en) | Air seal device with adjustable throttle | |
| CN113431787B (en) | System for preventing recirculation valve of feed pump from leaking under condition of adapting to frequent peak regulation situation | |
| CN113087055B (en) | Multi-point vacuumizing system and multi-point vacuumizing method of low-temperature multi-effect sea water desalting device | |
| CN113266442B (en) | Supercritical carbon dioxide recompression power generation system and operation control method thereof | |
| CN215479839U (en) | Multi-point vacuum pumping system of low-temperature multi-effect seawater desalination device | |
| CN114383838A (en) | High-temperature steam test system | |
| CN208934759U (en) | A kind of high steam decompression cooling noise reduction system | |
| CN210218248U (en) | Water-saving and energy-saving type water jet air extractor system | |
| JP2005264747A (en) | Ejector, its operation method, and refrigerating system | |
| Ma et al. | Research on the Supercharging Performance of the Annular Multi-Nozzles Ejector at the Suction Port of a Centrifugal Pump | |
| CN215636556U (en) | Needle valve for vacuum breaking in thermal power plant | |
| CN217841754U (en) | Double-flow low-pressure cylinder water spraying temperature reduction system of steam turbine and steam turbine | |
| CN113586252B (en) | Gas turbine box package environment control system and control method thereof | |
| CN219795346U (en) | Combined cooling device and steam turbine | |
| CN109026229A (en) | A kind of high steam decompression cooling noise reduction system | |
| CN211975079U (en) | Low-pressure cylinder cooling device used after cylinder cutting transformation of combined heat and power steam turbine generator unit | |
| CN217440120U (en) | Steam power vacuum pumping system | |
| CN210686073U (en) | Water supply pump steam turbine system | |
| CN220151405U (en) | Adjust low pressure turbine economizer that admits air | |
| CN220302195U (en) | System for adjusting and optimizing steam supply temperature of low-pressure shaft seal of thermal power plant | |
| CN114876666B (en) | Design method of suction type scramjet engine considering secondary flow system | |
| CN217501766U (en) | Heating system capable of supplying heat and expanding energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |