CN112761731A - Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead - Google Patents

Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead Download PDF

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Publication number
CN112761731A
CN112761731A CN202110112636.5A CN202110112636A CN112761731A CN 112761731 A CN112761731 A CN 112761731A CN 202110112636 A CN202110112636 A CN 202110112636A CN 112761731 A CN112761731 A CN 112761731A
Authority
CN
China
Prior art keywords
working chamber
natural gas
cylinder body
chamber cavity
wellhead
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.)
Pending
Application number
CN202110112636.5A
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Chinese (zh)
Inventor
杨飞
汪晓斌
吴地勇
石云升
李瑞云
梁力
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Aerospace Tianma Electrical Technology Co Ltd
Original Assignee
Guizhou Aerospace Tianma Electrical Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guizhou Aerospace Tianma Electrical Technology Co Ltd filed Critical Guizhou Aerospace Tianma Electrical Technology Co Ltd
Priority to CN202110112636.5A priority Critical patent/CN112761731A/en
Publication of CN112761731A publication Critical patent/CN112761731A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00Rotary-piston machines or engines
    • F01C1/08Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08Rotary pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10Outer members for co-operation with rotary pistons; Casings
    • F01C21/104Stators; Members defining the outer boundaries of the working chamber

Abstract

The invention provides a triangular rotor pneumatic generator for reducing pressure of a high-pressure natural gas wellhead, which comprises a cylinder body; a working chamber cavity is formed in the cylinder body, an eccentric triangular rotor is rotatably arranged in the working chamber cavity, a rotating shaft of the triangular rotor is a crankshaft, and the top point of the triangular rotor is attached to the inner wall of the working chamber cavity. The invention can convert the pressure energy of the high-pressure natural gas into mechanical energy through the rotation of the rotor, thereby realizing the conversion and utilization of the high pressure at the wellhead; six working can be realized in one exhaust period, the energy conversion efficiency is high, and the structure is simple and easy to maintain.

Description

Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead
Technical Field
The invention relates to a triangular rotor pneumatic generator for reducing pressure of a high-pressure natural gas wellhead.
Background
At present, in the oil and gas exploitation process at home and abroad, before high-pressure oil and gas at a wellhead of an oil and gas field enters a gas transmission pipe network, a pressure regulating valve is adopted for throttling and reducing pressure, the price of the pressure regulating valve is about ten-million yuan, the cost is high, and the service life is only about 3 months (valve core damage can be caused by cavitation and erosion during continuous pressure regulation). The existing screw expander, turbine expander and the like are not suitable for the high-pressure gas well, so that a device is urgently needed to replace a throttling valve and convert the pressure energy of the natural gas high-pressure gas well into energy in other forms.
Disclosure of Invention
In order to solve the technical problem, the invention provides the triangular rotor pneumatic generator for reducing the pressure of the high-pressure natural gas wellhead.
The invention is realized by the following technical scheme.
The invention provides a triangular rotor pneumatic generator for reducing pressure of a high-pressure natural gas wellhead, which comprises a cylinder body; a working chamber cavity is formed in the cylinder body, an eccentric triangular rotor is rotatably arranged in the working chamber cavity, a rotating shaft of the triangular rotor is a crankshaft, and the top point of the triangular rotor is attached to the inner wall of the working chamber cavity.
The cavity of the working chamber in the cylinder body is in a shape similar to a Chinese character '8' formed by double arcs.
And the cylinder body is provided with an air inlet and an air outlet which are communicated with the cylinder body at the positions of two sides of the longitudinal middle parting line of the working chamber cavity.
And both sides of the longitudinal middle parting line of the working chamber cavity on the cylinder body are provided with an air inlet and an air outlet.
The air outlets on any side of the longitudinal middle parting line of the working chamber cavity on the cylinder body correspond to the air inlets on the other side in flow, and are positioned on the same side of the transverse middle parting line of the working chamber cavity.
And an air inlet on one side of the longitudinal middle branching line of the working chamber cavity on the cylinder body is communicated to a high-pressure natural gas well head through a pipeline.
The gas outlet at the same side is communicated to a natural gas pipe network.
The air outlet on the opposite side communicates with the air inlet on the opposite side.
The invention has the beneficial effects that: the pressure energy of the high-pressure natural gas can be converted into mechanical energy through the rotation of the rotor, so that the conversion and utilization of the wellhead high pressure are realized; six working can be realized in one exhaust period, the energy conversion efficiency is high, and the structure is simple and easy to maintain.
Drawings
FIG. 1 is a schematic diagram of a first state of the present invention;
FIG. 2 is a schematic diagram of a second state of the present invention;
FIG. 3 is a schematic diagram of a third state according to an embodiment of the present invention;
in the figure: 1-cylinder block, 3-triangular rotor, 4-first air outlet, 5-second air inlet, 6-crankshaft, 7-second air outlet, 9-first air inlet and 10-weight reducing port.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The triangle rotor pneumatic generator for the wellhead depressurization of high-pressure natural gas as shown in figures 1 to 3 comprises a cylinder body 1; a working chamber cavity is formed in the cylinder body 1, an eccentric triangular rotor 3 is rotatably arranged in the working chamber cavity, a rotating shaft of the triangular rotor 3 is a crankshaft 6, and the top point of the triangular rotor 3 is attached to the inner wall of the working chamber cavity.
The working chamber cavity in the cylinder body 1 is in a shape similar to a Chinese character '8' formed by double arcs.
And an air inlet and an air outlet which are communicated with the cylinder body 1 are arranged on the cylinder body 1 and positioned at two sides of the longitudinal middle parting line of the working chamber cavity.
And both sides of the longitudinal middle parting line of the working chamber cavity on the cylinder body 1 are provided with an air inlet and an air outlet.
The air outlets on any side of the longitudinal middle parting line of the working chamber cavity on the cylinder body 1 correspond to the air inlets on the other side in flow, and are positioned on the same side of the transverse middle parting line of the working chamber cavity.
And an air inlet on one side of the longitudinal middle branching line of the working chamber cavity on the cylinder body 1 is communicated to a high-pressure natural gas well head through a pipeline.
The gas outlet at the same side is communicated to a natural gas pipe network.
The air outlet on the opposite side communicates with the air inlet on the opposite side.
Example 1
By adopting the scheme, the triangular rotor 3 and the crankshaft 6 are specifically arranged in the cylinder body 1, wherein the triangular rotor 3 is installed on the crankshaft 6 through an inner gear and an outer gear, the side wall of one side of the cylinder body 1 is provided with the first air inlet 9 and the second air outlet 7, the other side wall of the cylinder body is provided with the first air outlet 4 and the second air inlet 5, the first air inlet 9 is connected with a wellhead high-pressure pipeline through a flange, the first air outlet 4 is connected with the second air inlet 5 through a flange, the second air outlet 7 is connected with the secondary cylinder, the second air outlet of the secondary cylinder is connected with a pipe network through a flange, high-pressure gas enters from the first air inlet of the primary cylinder and comes out from the second air outlet of the secondary cylinder to push the triangular rotor to rotate, the triangular rotor 3 drives the crankshaft 6 to rotate, the crankshaft 6 drives the.
Therefore, the scheme can be pertinently installed on a natural gas high-pressure wellhead, the pressure difference is fully utilized, and pressure energy is converted into mechanical energy and then converted into electric energy.
Example 2
With the above arrangement, as shown in fig. 1 to 3, the triangular rotor 3 eccentrically rotates within the cylinder block 1 about the crankshaft 6, and a, b, and c in the drawings indicate three vertex angles of the rotor. The ab surface, bc surface and ca surface of the rotor and the cylinder 1 form closed working volumes as a first working chamber, a second working chamber and a third working chamber respectively. The first working chamber and the first air inlet 9 and the second air outlet correspond to the first working chamber, the first air outlet 4 corresponds to the second working chamber, and the second air inlet 5 corresponds to the third working chamber.
The triangular rotor 3 is always kept in linear fit with the inner wall of the cylinder body 1 in the rotating process, the end face of the triangular rotor 3 is provided with end face seals, so that the triangular rotor 3 is kept in fit with the inner wall of a cylinder cover in the rotating process, the middle of the triangular rotor 3 is provided with a center hole, and the center hole and an eccentric shaft are eccentrically matched to enable the triangular rotor 3 to rotate around the eccentric shaft, and meanwhile, the triangular rotor 3 rotates around the eccentric shaft.
The triangular rotor 3 is in the cavity formed by the cylinder 1 and the front and back end covers, the center of the rotor is provided with an eccentric bearing 2 and is matched with an eccentric shaft disc of an eccentric shaft, and an internal gear on the rotor is meshed with an external gear fixed on the end cover, and the gear ratio of the internal gear to the external gear is 3: 2. The cylinder 1 is regarded as the stator as the fixed end, the triangular rotor 3 is installed in the cavity that cylinder body and front and back end cover formed, do eccentric motion under the drive of 6 eccentric discs of bent axle, and the three summits of rotor slide along the cylinder inner wall, make the working chamber divide into independent three parts, accomplish respectively and admit air, expand, exhaust working process.
The rotary power source of the triangular rotor 3 is the pressure difference between the natural gas entering from the first gas inlet 9 and the natural gas coming out from the second-stage gas outlet 7 at the natural gas high-pressure wellhead.
When in use: the pressure of the high-pressure natural gas acts on the triangular rotor to enable the rotor to rotate, the triangular rotor 3 drives the crankshaft 6 to rotate, and the crankshaft 6 outputs mechanical energy. In the motion process of the triangular rotor in the cylinder body, the vertex of the rotor is always attached to the inner wall surface of the cylinder body 1, so that the interior of the cylinder body 1 is divided into three independent spaces, and the volume of three working chambers of the triangular rotor 3 is always changed in the rotation process because the inner wall surface of the cylinder body is a curved surface with the curvature changing constantly. The working process of each working chamber of the pneumatic motor comprises three processes of air inlet, expansion and air exhaust, when the vertex angle of the rotor rotates to a corresponding air inlet angle, the air inlets 9 and 5 are opened to enable high-pressure natural gas to enter the cavity and begin to expand to do work, the rotor continues to rotate, and the air inlets are closed after air inlet is completed; then the gas expansion stage is completed when the volume of the working chamber continues to correspond to the angle; at the moment, the exhaust ports 4 and 7 are opened to start exhaust, the exhaust ports are closed when the crankshaft 6 rotates to a certain angle, the exhaust time law and the volume change law of the three working chambers are the same after the exhaust is finished, and the ratio of the rotating speed of the triangular rotor 3 to the rotating speed of the crankshaft 6 is 1:3, so that the triangular rotor 3 rotates for one circle corresponding to the crankshaft and rotates for three circles; and because the rotor completes two work doing of each working chamber in one rotation period, the three working chambers complete six work doing together.
As shown in fig. 1, when the crank angle is pi/2, the gas inlet 9 is opened, the high-pressure natural gas starts to enter the first working chamber, and the volume of the first working chamber is gradually increased from the minimum state to the first working chamber;
as shown in fig. 2, when the crankshaft rotates to 3 pi/2, the air intake of the first working chamber is just completed, the air inlet 9 is closed after the air intake is completed, and the air in the first working chamber begins to expand and reduce the pressure; the air inlet 5 is opened, and the second working chamber starts to intake air;
as shown in fig. 3, when the crankshaft rotates to 2 pi, at which time the first working chamber volume reaches a maximum, the exhaust port 4 opens, and exhaust begins by the end of this expansion phase; the inlet 5 is still open and the second working chamber is in the intake phase.

Claims (8)

1. The utility model provides a triangle rotor pneumatic generator for high-pressure natural gas well head step-down, includes cylinder body (1), its characterized in that: a working chamber cavity is arranged in the cylinder body (1), an eccentric triangular rotor (3) can be rotatably arranged in the working chamber cavity, a rotating shaft of the triangular rotor (3) is a crankshaft (6), and the top point of the triangular rotor (3) is attached to the inner wall of the working chamber cavity.
2. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 1 further comprising: the working chamber cavity in the cylinder body (1) is in a shape similar to a Chinese character '8' formed by double arcs.
3. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 1 further comprising: and the cylinder body (1) is provided with an air inlet and an air outlet which are communicated with the cylinder body (1) at the positions of two sides of the longitudinal middle parting line of the working chamber cavity.
4. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 3, wherein: and both sides of the longitudinal middle parting line of the working chamber cavity on the cylinder body (1) are provided with an air inlet and an air outlet.
5. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 4 further comprising: the air outlet on any side of the longitudinal middle parting line of the working chamber cavity on the cylinder body (1) corresponds to the air inlet on the other side in flow, and is positioned on the same side of the transverse middle parting line of the working chamber cavity.
6. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 1 further comprising: and an air inlet on one side of the longitudinal middle branching line of the working chamber cavity on the cylinder body (1) is communicated to a high-pressure natural gas well head through a pipeline.
7. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 6 further comprising: the gas outlet at the same side is communicated to a natural gas pipe network.
8. The rotary delta pneumatic generator for wellhead depressurization of high pressure natural gas of claim 6 further comprising: the air outlet on the opposite side communicates with the air inlet on the opposite side.
CN202110112636.5A 2021-01-27 2021-01-27 Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead Pending CN112761731A (en)

Priority Applications (1)

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CN202110112636.5A CN112761731A (en) 2021-01-27 2021-01-27 Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110112636.5A CN112761731A (en) 2021-01-27 2021-01-27 Triangular rotor pneumatic generator for pressure reduction of high-pressure natural gas wellhead

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CN112761731A true CN112761731A (en) 2021-05-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113898436A (en) * 2021-10-25 2022-01-07 四川华工石油装备有限公司 Method for generating electricity by reducing pressure of high-pressure natural gas at well mouth and triangular rotor pneumatic motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047856A (en) * 1976-03-18 1977-09-13 Hoffman Ralph M Rotary steam engine
JPH04148033A (en) * 1990-10-06 1992-05-21 Shuhei Aiba Rotary engine
CN103912324A (en) * 2014-04-30 2014-07-09 郭远军 Rotor high-low pressure power device and work doing method of rotor high-low pressure power device
CN214145579U (en) * 2021-01-27 2021-09-07 贵州航天天马机电科技有限公司 Pneumatic generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047856A (en) * 1976-03-18 1977-09-13 Hoffman Ralph M Rotary steam engine
JPH04148033A (en) * 1990-10-06 1992-05-21 Shuhei Aiba Rotary engine
CN103912324A (en) * 2014-04-30 2014-07-09 郭远军 Rotor high-low pressure power device and work doing method of rotor high-low pressure power device
CN214145579U (en) * 2021-01-27 2021-09-07 贵州航天天马机电科技有限公司 Pneumatic generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113898436A (en) * 2021-10-25 2022-01-07 四川华工石油装备有限公司 Method for generating electricity by reducing pressure of high-pressure natural gas at well mouth and triangular rotor pneumatic motor

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