CN110630335A - Gas expansion device - Google Patents
Gas expansion device Download PDFInfo
- Publication number
- CN110630335A CN110630335A CN201910842582.0A CN201910842582A CN110630335A CN 110630335 A CN110630335 A CN 110630335A CN 201910842582 A CN201910842582 A CN 201910842582A CN 110630335 A CN110630335 A CN 110630335A
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- Prior art keywords
- flow guide
- gas
- movable
- shell
- movable impeller
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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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
- F01D1/04—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially axially
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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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
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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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a gas expansion device, which comprises a shell, wherein a gas inlet and a gas outlet are formed in the shell, a flow guide device and a fixed support are sequentially and fixedly arranged in the shell along the direction from the gas inlet to the gas outlet, a movable shaft is rotatably arranged on the flow guide device and the fixed support, a movable impeller is fixedly arranged on the movable shaft and positioned between the flow guide device and the fixed support, and the flow guide device and the movable impeller are arranged along the direction from the gas inlet to the gas outlet of the shell. The gas expansion device aims to solve the hidden danger and the defect of the existing natural gas pipeline expansion device, is applied to a natural gas medium-low pressure pipe network, and improves the utilization efficiency of pressure energy.
Description
Technical Field
The invention relates to the field of natural gas pressure energy utilization, in particular to a gas expansion device for a natural gas pipeline, which fully utilizes the natural gas pressure energy.
Background
Before natural gas is conveyed to a user through a pipe network, the natural gas needs to be depressurized, an original pressure regulating valve is replaced by a gas expansion device, and pressure energy contained in the natural gas can be effectively utilized. The expansion device outputs mechanical energy outwards to drive the generator to generate electricity, and the output electricity can be used for production and operation of the natural gas pressure regulating station.
The Chinese invention patent CN106640245A discloses a method and a device for recovering pressure energy of a natural gas pipe network by using a piston type expansion machine, wherein high-pressure natural gas is expanded by the expansion machine to convert the pressure energy into mechanical energy, and then the rotating speed of a rotor is matched with the frequency of a generator through a gearbox to generate electricity for users with electricity consumption requirements of 20-60 kW. The invention adopts the improved piston type expansion machine, has wide application range, is suitable for the pressure regulating working condition with the expansion ratio higher than 10 and higher than 4MPa of high-pressure pipe network, and is not suitable for the medium-low pressure regulating working condition.
Chinese utility model patent CN204851334U discloses an intelligent natural gas pipe network pressure energy power generation facility. The fluid motor is adopted to output mechanical work in the natural gas expansion process to drive the rotating speed transmitter and the generator to rotate, the rotating speed transmitter is adjusted through variable speed, so that the rotating speed of the fluid motor is matched with that of the generator, the generator outputs electric power, and standard voltage is output through a voltage-stabilizing and frequency-stabilizing power supply and is divided into two paths for storage and field and station power utilization. However, the fluid motor has small output power and large noise, is easy to vibrate, and has leakage hidden trouble at the transmission sealing position.
Disclosure of Invention
The invention aims to solve the hidden danger and the defects of the existing natural gas pipeline expansion device, and provides a gas expansion device which is applied to a natural gas medium-low pressure pipe network and improves the utilization efficiency of pressure energy.
The invention relates to a gas expansion device, which comprises a shell, wherein a gas inlet and a gas outlet are arranged on the shell, a flow guide device and a fixed support are sequentially and fixedly arranged in the shell along the direction from the gas inlet to the gas outlet, a moving shaft is rotatably arranged on the flow guide device and the fixed support, a moving impeller is fixedly arranged on the moving shaft and positioned between the flow guide device and the fixed support, and the flow guide device and the moving impeller are arranged along the direction from the gas inlet to the gas outlet of the shell.
In the gas expansion device of the present invention, the housing is cylindrical, and the gas inlet end and the gas outlet end of the housing are provided with a flange.
According to the gas expansion device, the flow guide device is disc-shaped, the flow guide device is provided with a plurality of flow guide gaps, the flow guide gaps are uniformly arranged in an annular shape, the distance from each flow guide gap to the circle center of the flow guide device is equal, and each flow guide gap is arranged by deflecting a first angle relative to the direction from the gas inlet to the gas outlet of the shell.
The gas expansion device comprises a flow guide device, wherein the flow guide device is provided with a plurality of flow guide gaps in a specific mode: the flow guide device comprises an inner circular disc body and an outer circular ring body, the outer circular ring body is located on the outer side of the inner circular disc body, a plurality of flow guide vanes are fixedly connected between the inner circular disc body and the outer circular ring body, each flow guide vane is arranged in a deflection first angle mode relative to the direction from a gas inlet to a gas outlet of the shell, and a flow guide gap is formed between every two adjacent flow guide vanes.
The gas expansion device comprises a shell, a guide slot, a guide vane and a plurality of movable vane blades, wherein the movable vane is in a disc shape, a plurality of movable vane blades which are uniformly arranged are arranged on a rim of the movable vane, each movable vane blade is arranged by a second angle relative to the direction from a gas inlet to a gas outlet of the shell, and the movable vane blades are opposite to the extending direction of the guide slot.
The gas expansion device comprises three flow guiding devices and three movable impellers, wherein the three flow guiding devices are respectively a first flow guiding device, a second flow guiding device and a third flow guiding device, the three movable impellers are respectively a first movable impeller, a second movable impeller and a third movable impeller, and the first flow guiding device, the first movable impeller, the second flow guiding device, the second movable impeller, the third flow guiding device and the third movable impeller are sequentially arranged along the direction from the gas inlet to the gas outlet of the shell.
The gas expansion device of the invention has the following specific modes that the guide device and the fixed support are rotatably provided with the moving shaft: the flow guide device and the fixed support are respectively rotatably installed on the moving shaft through a first bearing and a second bearing.
The gas expansion device comprises a shell, wherein a flow guide device is fixedly arranged in the shell in a specific mode: the wheel edge of the flow guide device is fixedly connected with a flow guide connecting plate through bolts, and the flow guide connecting plate is fixedly arranged in the shell.
The gas expansion device of the invention, wherein the specific mode of fixedly mounting the movable impeller on the moving shaft is as follows: the moving shaft and the moving impeller are connected through a spline.
In the gas expansion device, the movable impeller is made of stainless steel, the number of the movable impeller blades is 22, and the second angle is 15-30 degrees.
When the gas expansion device is used, the shell is connected to a pipeline, so that natural gas enters from a gas inlet of the shell, then flows out from a gas outlet after passing through the flow guide device and the movable impeller, the natural gas is directly blown onto the movable impeller and pushes the movable impeller to rotate after being guided by the flow guide device, and when the movable impeller rotates, a movable shaft fixed with the movable impeller also rotates, so that the movable shaft outputs mechanical energy. Therefore, the invention is suitable for natural gas medium and low pressure pipe networks, improves the utilization efficiency of pressure energy, and eliminates the hidden troubles of small output power, large noise, easy vibration generation and leakage at a transmission sealing position of the fluid motor because the fluid motor is not used.
The invention will be further explained with reference to the drawings.
Drawings
FIG. 1 is a schematic view of the construction of a gas expansion device according to the present invention;
FIG. 2 is a schematic view of the structure of the deflector of the present invention;
FIG. 3 is a schematic structural view of a movable impeller according to the present invention;
FIG. 4 is a schematic structural view of a guide vane of the present invention;
fig. 5 is a schematic structural view of a movable impeller blade according to the present invention.
Shown in the figure are: 1-a first flange; 2-a shell; 3-moving the shaft; 4-a first bearing; 5-a flow guide device; 6-guide vane; 7-a flow guide connecting hole; 8-a flow guide connecting plate; 9-moving impeller; 10-moving impeller blades; 11-a fixed support; 12-a second bearing; 13-a second flange; 14-flow guiding gap.
Detailed Description
As shown in fig. 1, the gas expansion device of the present invention includes a housing 2, a gas inlet and a gas outlet are provided on the housing 2, a flow guiding device 5 and a fixing bracket 11 are sequentially and fixedly installed in the housing 2 along a direction from the gas inlet to the gas outlet, a moving shaft 3 is rotatably installed on the flow guiding device 5 and the fixing bracket 11, a moving impeller 9 is fixedly installed on the moving shaft 3, the moving impeller 9 is located between the flow guiding device 5 and the fixing bracket 11, and the flow guiding device 5 and the moving impeller 9 are arranged along a direction from the gas inlet to the gas outlet of the housing 2.
The housing 2 is cylindrical, a flange is arranged at both the gas inlet end and the gas outlet end of the housing 2, the flange at the gas inlet end is a first flange 1, and the flange at the gas outlet end is a second flange 13.
The flow guiding device 5 is disc-shaped, a plurality of flow guiding gaps 14 are formed in the flow guiding device 5, the flow guiding gaps 14 are uniformly arranged in an annular shape, the distance from each flow guiding gap 14 to the circle center of the flow guiding device 5 is equal, and each flow guiding gap 14 deflects for a first angle relative to the direction from a gas inlet to a gas outlet of the shell 2.
As shown in fig. 2, the specific manner of opening the plurality of flow guiding slits 14 on the flow guiding device 5 is as follows: the flow guiding device 5 comprises an inner circular disc body and an outer circular ring body, the outer circular ring body is located on the outer side of the inner circular disc body, a plurality of flow guiding vanes 6 are fixedly connected between the inner circular disc body and the outer circular ring body, as shown in fig. 4, each flow guiding vane 6 deflects for a first angle relative to the direction from the gas inlet to the gas outlet of the shell 2, and a flow guiding gap 14 is formed between every two adjacent flow guiding vanes 6.
As shown in fig. 3 and fig. 5, the movable impeller 9 is disc-shaped, a plurality of movable impeller blades 10 are uniformly arranged on a rim of the movable impeller 9, each movable impeller blade 10 is arranged by deflecting a second angle with respect to a direction from the gas inlet to the gas outlet of the casing 2, the movable impeller blades 10 are opposite to an extending direction of the guide slit 14 (i.e., the deflecting direction of the movable impeller blades 10 is opposite to the deflecting direction of the guide vane 6), and the movable impeller blades 10 are convenient for the gas to blow and rotate after passing through the guide slit 14.
As shown in fig. 1, three flow guiding devices 5 and three movable impellers 9 are provided, the three flow guiding devices 5 are respectively a first flow guiding device, a second flow guiding device and a third flow guiding device, the three movable impellers are respectively a first movable impeller, a second movable impeller and a third movable impeller, and the first flow guiding device, the first movable impeller, the second flow guiding device, the second movable impeller, the third flow guiding device and the third movable impeller are sequentially arranged along a direction from a gas inlet to a gas outlet of the casing 2.
The first movable impeller is positioned between the first flow guide device and the fixed support 11, and the first flow guide device and the first movable impeller are arranged along the direction from the gas inlet to the gas outlet of the shell 2; the second movable impeller is positioned between the second flow guide device and the fixed support 11, and the second flow guide device and the second movable impeller are arranged along the direction from the gas inlet to the gas outlet of the shell 2; the third movable impeller is located between the third flow guiding device and the fixed bracket 11, and the third flow guiding device and the third movable impeller are arranged along the direction from the gas inlet to the gas outlet of the casing 2.
The three flow guiding devices 5 and the three movable impellers 9 are arranged at intervals to form a multi-stage series connection, and the shortest distance between the three flow guiding devices and the movable impellers is 1 mm. The number of the flow guiding devices 5 and the movable impellers 9 can be selected by the staff according to actual conditions.
The gas expansion device of the invention, wherein the specific mode of rotatably mounting the moving shaft 3 on the flow guide device 5 and the fixed bracket 11 is as follows: the flow guide device 5 and the fixed bracket 11 are rotatably mounted on the moving shaft 3 through a first bearing 4 and a second bearing 12 respectively.
The gas expansion device of the invention, wherein the specific mode of fixedly installing the flow guide device 5 in the shell 2 is as follows: the wheel edge of the flow guide device 5 is fixedly connected with a flow guide connecting plate 8 through a bolt (penetrating through a flow guide connecting hole 7 in the wheel edge of the flow guide device), and the flow guide connecting plate 8 is fixedly arranged in the shell 2 through the bolt. As shown in fig. 2, when the deflector 5 includes an inner circular body and an outer circular body, the deflector connection hole 7 is provided on the outer circular body.
The gas expansion device of the invention, wherein the specific mode of fixedly mounting the movable impeller 9 on the moving shaft 3 is as follows: the moving shaft 3 and the movable impeller 9 are connected through a spline.
In the gas expansion device of the present invention, the movable impeller 9 is made of stainless steel, the number of the movable impeller blades 10 is 22, and the second angle (i.e., the deflection angle of the movable impeller blades 10) is 15 to 30 °, preferably 15 °.
When the gas expansion device is used, the shell 2 is connected to a pipeline, so that natural gas enters from a gas inlet of the shell 2, then flows out from a gas outlet after passing through the flow guide device 5 and the movable impeller 9, the natural gas is directly blown on the movable impeller 9 after being guided by the flow guide device 5 and pushes the movable impeller 9 to rotate, when the movable impeller 9 rotates, the movable shaft 3 fixed with the movable impeller 9 also rotates, and then the movable shaft 3 outputs mechanical energy. Therefore, the invention is suitable for natural gas medium and low pressure pipe networks, improves the utilization efficiency of pressure energy, and eliminates the hidden troubles of small output power, large noise, easy vibration generation and leakage at a transmission sealing position of the fluid motor because the fluid motor is not used.
In one embodiment of the invention, the pressure in the high-pressure natural gas pipeline is 0.4MPa, the pipe diameter is DN50, the high-pressure natural gas pipeline is connected with the high-pressure natural gas pipeline, when the natural gas flow is 100Nm3/h, the working rotating speed of the moving shaft 3 is 800-1500 rpm, the moving shaft 3 is externally connected with a generator, the generated energy of the single-stage blade installation is 0.49kW, the generated energy of the secondary blade installation is 0.91kW, and the generated energy is increased by 85.7%.
The invention has the advantages that:
(1) the problem of natural gas pressure energy utilization in medium and low pressure, low flow operating mode is solved, and energy utilization efficiency is improved through multistage series connection.
(2) Structural parameters including the flow guide device 5 and the movable impeller 9 are optimized, so that the rotating speed is reduced, the requirements on materials and manufacturing processes of the generator are low, and the power generation cost of natural gas pressure energy is reduced.
(3) The axial flow type blades with the symmetrical structures are adopted, so that the vibration is effectively reduced, and the requirement of power output hardware is lowered.
(4) The gas adopts the mode of directly advancing directly out, effectively reduces expansion device volume, reduces equipment area.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A gas expansion device, characterized by: the gas guiding device comprises a housing, be equipped with gas inlet and gas outlet on the casing, follow gas inlet to gas outlet direction fixed mounting in proper order in the casing and have guiding device and fixed bolster, rotate on guiding device and the fixed bolster and install an moving axis, fixed mounting has movable vane wheel on the moving axis, movable vane wheel is located between guiding device and the fixed bolster, guiding device and movable vane wheel are arranged to gas outlet direction along the gas inlet of casing.
2. A gas expansion device according to claim 1, wherein: the shell is cylindrical, and a flange is arranged at the gas inlet end and the gas outlet end of the shell.
3. A gas expansion device according to claim 2, wherein: the flow guide device is disc-shaped, a plurality of flow guide gaps are formed in the flow guide device and are uniformly arranged in an annular mode, the distance from each flow guide gap to the circle center of the flow guide device is equal, and each flow guide gap is arranged in a manner of deflecting a first angle relative to the direction from a gas inlet to a gas outlet of the shell.
4. The gas expansion device according to claim 3, wherein the flow guide device is provided with a plurality of flow guide slits in a specific manner of: the flow guide device comprises an inner circular disc body and an outer circular ring body, the outer circular ring body is located on the outer side of the inner circular disc body, a plurality of flow guide vanes are fixedly connected between the inner circular disc body and the outer circular ring body, each flow guide vane is arranged in a deflection first angle mode relative to the direction from a gas inlet to a gas outlet of the shell, and a flow guide gap is formed between every two adjacent flow guide vanes.
5. A gas expansion device according to claim 4, wherein: the movable impeller is disc-shaped, a plurality of movable impeller blades which are uniformly arranged are arranged on the rim of the movable impeller, each movable impeller blade is deflected by a second angle relative to the direction from the gas inlet to the gas outlet of the shell, and the movable impeller blades are opposite to the extending direction of the flow guide gap.
6. The gas expansion device of claim 5, wherein: the gas guiding device comprises a shell, a gas inlet, a gas outlet, a gas guiding device, a first movable impeller, a second movable impeller, a third movable impeller, a first guiding device, a second guiding device, a third guiding device and a third movable impeller, wherein the guiding devices and the movable impellers are arranged in sequence along the direction from the gas inlet to the gas outlet of the shell.
7. A gas expansion device according to claim 6, wherein the flow guide and the fixed support are rotatably mounted with a movable shaft by: the flow guide device and the fixed support are respectively rotatably installed on the moving shaft through a first bearing and a second bearing.
8. The gas expansion device of claim 7, wherein the flow guide device is fixedly mounted in the housing by: the wheel edge of the flow guide device is fixedly connected with a flow guide connecting plate through bolts, and the flow guide connecting plate is fixedly arranged in the shell.
9. The gas expansion device according to claim 8, wherein the movable impeller is fixedly mounted on the movable shaft in a manner that: the moving shaft and the moving impeller are connected through a spline.
10. A gas expansion device according to claim 9, wherein: the movable impeller is made of stainless steel, the number of the movable impeller blades is 22, and the second angle is 15-30 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910842582.0A CN110630335A (en) | 2019-09-06 | 2019-09-06 | Gas expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910842582.0A CN110630335A (en) | 2019-09-06 | 2019-09-06 | Gas expansion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630335A true CN110630335A (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910842582.0A Pending CN110630335A (en) | 2019-09-06 | 2019-09-06 | Gas expansion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110630335A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165291A (en) * | 2021-10-22 | 2022-03-11 | 上海工程技术大学 | Pneumatic impeller |
| CN114934814A (en) * | 2022-07-21 | 2022-08-23 | 江苏友诚数控科技有限公司 | Intelligent single-point jet gas expansion power generation device |
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| CN1086579A (en) * | 1992-08-29 | 1994-05-11 | 亚瑞亚·勃朗勃威力有限公司 | Axial flow turbine |
| KR20110115756A (en) * | 2010-04-16 | 2011-10-24 | 김훈 | Turbine-integrated generator for generating electricity using gas pressure in a gas pipe |
| US20120093640A1 (en) * | 2010-10-13 | 2012-04-19 | National Tsing Hua University (Taiwan) | Micro turbine |
| US20130192231A1 (en) * | 2010-10-15 | 2013-08-01 | Baltico Gmbh | Turbine Wheel Arrangement For A Gas Turbine |
| CN108729960A (en) * | 2018-06-01 | 2018-11-02 | 北京市燃气集团有限责任公司 | Bilobed wheel and power generator for pressure energy of natural gas power generation |
| CN109404235A (en) * | 2018-12-04 | 2019-03-01 | 上海海洋大学 | A kind of turbine type excess pressure power generating device of thermal gradient energy power generation |
-
2019
- 2019-09-06 CN CN201910842582.0A patent/CN110630335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086579A (en) * | 1992-08-29 | 1994-05-11 | 亚瑞亚·勃朗勃威力有限公司 | Axial flow turbine |
| KR20110115756A (en) * | 2010-04-16 | 2011-10-24 | 김훈 | Turbine-integrated generator for generating electricity using gas pressure in a gas pipe |
| US20120093640A1 (en) * | 2010-10-13 | 2012-04-19 | National Tsing Hua University (Taiwan) | Micro turbine |
| US20130192231A1 (en) * | 2010-10-15 | 2013-08-01 | Baltico Gmbh | Turbine Wheel Arrangement For A Gas Turbine |
| CN108729960A (en) * | 2018-06-01 | 2018-11-02 | 北京市燃气集团有限责任公司 | Bilobed wheel and power generator for pressure energy of natural gas power generation |
| CN109404235A (en) * | 2018-12-04 | 2019-03-01 | 上海海洋大学 | A kind of turbine type excess pressure power generating device of thermal gradient energy power generation |
Non-Patent Citations (1)
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| 青山热电厂 武汉水利电力学校: "《N100-90/535型汽轮机》", 31 December 1979 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165291A (en) * | 2021-10-22 | 2022-03-11 | 上海工程技术大学 | Pneumatic impeller |
| CN114165291B (en) * | 2021-10-22 | 2023-11-24 | 上海工程技术大学 | Pneumatic impeller |
| CN114934814A (en) * | 2022-07-21 | 2022-08-23 | 江苏友诚数控科技有限公司 | Intelligent single-point jet gas expansion power generation device |
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Application publication date: 20191231 |
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