Integral gas expansion generator

Abstract

The utility model discloses an integral type gas expansion generator which comprises a power generation assembly, a wire outlet end cover fixedly arranged at one end of a shell in a sealed mode, an exhaust end cover fixedly arranged at the other end of the shell in a sealed mode, a first exhaust channel arranged on the exhaust end cover, and a flow guide body fixedly arranged in the shell in a sealed mode. The flow guide body is in sealing fit with the exhaust end cover, a second exhaust channel matched with the first exhaust channel is formed in the flow guide body and matched with one end of the turbine rotor, the other end of the turbine rotor is fixedly arranged on the power generation assembly, and the power generation assembly is fixedly arranged on the inner wall of the shell. An air inlet flange is fixedly arranged on the outer wall of the shell in a sealed mode, and an air inlet channel is formed in the air inlet flange. The expansion machine and the power generator are directly connected and arranged in the shell, a speed reducer is omitted, cost is reduced, energy loss is reduced in the transmission process, the power generator is free of external dynamic sealing, the sealing effect is better, and the risk of natural gas leakage does not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of generators, in particular to an integral gas expansion generator. Background Art

[0002] During the natural gas extraction process, due to the high pressure in the formation, each production well station first directly reduces the pressure from high pressure and then transmits it to a nearby purification plant for treatment. During this gas transmission process, there is natural gas flow and pressure difference, and the pressure difference energy here has great potential value. At present, pressure difference energy is mostly used for power generation. An expander is used to pick up the pressure difference energy, and the power shaft drives the reducer, which then drives the generator to generate electricity, thereby converting the pressure difference energy into electrical energy. The same type of power generation equipment mostly uses a power generation system consisting of an expander + reducer + generator. Such a power generation system has a complex structure, large energy loss during the transmission process, and also leads to increased equipment purchase costs. In addition, there is a high-pressure dynamic seal structure between the expander and the reducer, and natural gas will leak to a certain extent on the sealing surface. The reuse of the leaked natural gas is relatively difficult, and the natural gas leakage also poses risks. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an integrated gas expansion generator.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] An integral gas expansion generator comprises a shell, an exhaust end cover, an outlet end cover, a guide body, an air inlet flange, a turbine rotor and a power generation assembly, wherein the outlet end cover is sealed and fixed on one end of the shell, the exhaust end cover is sealed and fixed on the other end of the shell, a first exhaust channel is provided on the exhaust end cover, the guide body is sealed and fixed in the shell, the guide body and the exhaust end cover are sealed together, and a second exhaust channel cooperating with the first exhaust channel is provided in the guide body, the second exhaust channel is cooperating with one end of the turbine rotor, the other end of the turbine rotor is fixedly provided on the power generation assembly, the power generation assembly is fixedly provided on the inner wall of the shell, the air inlet flange is sealed and fixed on the outer wall of the shell, and an air inlet channel penetrating and cooperating with the turbine rotor is provided in the air inlet flange.

[0006] Furthermore, the power generation assembly includes a generator stator, a generator rotor, a middle bearing seat and an end bearing seat. The middle bearing seat and the end bearing seat are both fixedly arranged in the shell, and the end bearing seat is arranged close to the outlet end cover side. The generator stator is fixedly arranged on the inner wall of the shell, the generator rotor is coaxially arranged on the generator stator and one end is connected to the end bearing seat, and the other end of the generator rotor passes through the middle bearing seat and is coaxially fixedly connected to the turbine rotor.

[0007] Furthermore, a first bearing is provided between the generator rotor and the middle bearing seat, and a second bearing is provided between the end bearing seat and the middle bearing seat.

[0008] Furthermore, a first mounting groove is provided on the end portion of the shell, and the end bearing seat is fixedly provided in the first mounting groove.

[0009] Furthermore, a limiting protrusion is fixedly provided on the inner wall of the shell, and the limiting protrusion is provided between the middle bearing seat and the air inlet flange.

[0010] Furthermore, a second mounting groove is provided on the end portion of the shell, and the flow guide is fixedly provided in the second mounting groove.

[0011] Furthermore, the first exhaust passage, the second exhaust passage and the turbine rotor are coaxially arranged.

[0012] Furthermore, the inner wall of the second exhaust channel is trumpet-shaped.

[0013] Furthermore, a flow pipe is provided on the shell, one end of the flow pipe is communicated with the interior of the outlet end cover, and the other end of the flow pipe is communicated with the second exhaust channel.

[0014] The beneficial effects of the utility model are:

[0015] 1) In this technology, the expander is directly connected to the generator and is arranged in the shell, without a reducer, which reduces costs and reduces energy loss during the transmission process. In addition, the generator has no dynamic seal to the outside, which makes the sealing effect better and eliminates the risk of natural gas leakage.

[0016] 2) In this technology, the generator has a simple structure, low manufacturing cost, and can fully utilize the pressure difference energy of natural gas.

[0017] 3) In this technology, the provision of a flow pipe can effectively remove the heat from the generator's upper terminal cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a diagram of the connection structure between the expander, reducer and generator in the prior art;

[0019] Figure 2 This is a schematic diagram of the internal connection structure of the utility model;

[0020] In the figure, 1-housing, 2-exhaust end cover, 3-outlet end cover, 4-flow guide, 5-inlet flange, 6-turbine rotor, 7-first exhaust channel, 8-second exhaust channel, 9-inlet channel, 10-generator stator, 11-generator rotor, 12-middle bearing seat, 13-end bearing seat, 14-first bearing, 15-second bearing, 16-first mounting groove, 17-limiting protrusion, 18-second mounting groove, 19-circulation pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0022] See Figure 2 , the utility model provides a technical solution:

[0023] An integrated gas expansion generator includes a housing 1, an exhaust end cap 2, an outlet end cap 3, a guide body 4, an intake flange 5, a turbine rotor 6, and a power generation assembly. The outlet end cap 3 is sealed and fixedly mounted on one end of the housing 1, the exhaust end cap 2 is sealed and fixedly mounted on the other end of the housing 1, and a first exhaust passage 7 is disposed on the upper portion of the exhaust end cap 2. The housing 1 is sealed and fixedly mounted with a guide body 4, which is in sealed engagement with the exhaust end cap 2. A second exhaust passage 8 is disposed within the guide body 4, which engages with the first exhaust passage 7. The second exhaust passage 8 engages with one end of the turbine rotor 6, the other end of which is fixedly mounted on the power generation assembly. The power generation assembly is fixedly mounted on the inner wall of the housing 1. An intake flange 5 is sealed and fixedly mounted on the outer wall of the housing 1, and an intake passage 9 is disposed within the intake flange 5, extending through the housing 1 and engaging with the turbine rotor 6. The first and second exhaust passages 7, 8, and turbine rotor 6 are coaxially arranged. The inner wall of the second exhaust passage 8 is trumpet-shaped. The exhaust end cap 2 and the outlet end cap 3 are bolted and sealed to each end of the housing 1. Seal rings are installed between the exhaust end cap 2 and the outlet end cap 3 and the housing 1. Natural gas enters the housing 1 through the intake channel 9 on the intake flange 5. Upon entry, it acts on the conventional turbine rotor 6, which drives the generator rotor 11 to rotate and generate electricity. The natural gas then passes through the second exhaust channel 8 and the first exhaust channel 7, and then enters the purification plant through a pipeline for processing. The guide body 4 is used in conjunction with the turbine rotor 6 to maximize the conversion of the natural gas's pressure differential energy into kinetic energy for the rotation of the turbine rotor 6. The outlet end cap 3 is used to seal the installation of the transmission cable.

[0024] In some embodiments, a power generation assembly includes a generator stator 10, a generator rotor 11, a central bearing seat 12, and an end bearing seat 13. Both the central bearing seat 12 and the end bearing seat 13 are fixedly mounted within the housing 1, with the end bearing seat 13 positioned near the outlet end cap 3. The generator stator 10 is fixedly mounted on the inner wall of the housing 1. The generator rotor 11 is coaxially mounted within the generator stator 10, with one end connected to the end bearing seat 13. The other end of the generator rotor 11 passes through the central bearing seat 12 and is coaxially fixedly connected to the turbine rotor 6. A first bearing 14 is disposed between the generator rotor 11 and the central bearing seat 12, and a second bearing 15 is disposed between the end bearing seat 13 and the central bearing seat 12. The generator stator 10, generator rotor 11, first bearing 14, and second bearing 15 are conventional bearings. The first bearing 14 and second bearing 15 facilitate rotation of the generator rotor 11 on the central bearing seat 12 and the end bearing seat 13, thereby cooperating with the generator stator 10 to generate electricity.

[0025] In some embodiments, a first mounting groove 16 is provided at the end of the housing 1, and the end bearing seat 13 is fixedly mounted in the first mounting groove 16. A limiting protrusion 17 is fixedly mounted on the inner wall of the housing 1, and is disposed between the middle bearing seat 12 and the intake flange 5. The first mounting groove 16 is provided for mounting and fixing the end bearing seat 13, and the limiting protrusion 17 is provided to prevent the middle bearing seat 12 from moving toward the exhaust end cover 2. The generator stator 10 is disposed between the middle bearing seat 12 and the end bearing seat 13, thereby limiting the movement of the middle bearing seat 12.

[0026] In some embodiments, a second mounting groove 18 is provided on the end of the housing 1, and the guide body 4 is fixedly provided in the second mounting groove 18. The second mounting groove 18 is provided to install the guide body 4 to prevent the guide body 4 from moving in the housing 1.

[0027] In some embodiments, a flow tube 19 is provided on the housing 1. One end of the flow tube 19 communicates with the interior of the outlet end cap 3, and the other end of the flow tube 19 communicates with the second exhaust passage 8. The natural gas in the second exhaust passage 8 has a high velocity and low pressure. Through the action of the flow tube 19, the heat within the outlet end cap 3 can be extracted, thereby effectively cooling the generator.

[0028] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "setting", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. An integrated gas expansion generator, characterized in that: The invention comprises a shell (1), an exhaust end cover (2), an outlet end cover (3), a guide body (4), an air inlet flange (5), a turbine rotor (6) and a power generation assembly, wherein the outlet end cover (3) is sealed and fixedly arranged on one end of the shell (1), the exhaust end cover (2) is sealed and fixedly arranged on the other end of the shell (1), a first exhaust channel (7) is arranged on the exhaust end cover (2), the guide body (4) is sealed and fixedly arranged in the shell (1), and the guide body (4) and the exhaust end cover (2) are sealed and matched. The guide body (4) is provided with a second exhaust channel (8) cooperating with the first exhaust channel (7), the second exhaust channel (8) is cooperating with one end of the turbine rotor (6), the other end of the turbine rotor (6) is fixedly provided on the power generation assembly, the power generation assembly is fixedly provided on the inner wall of the housing (1), the outer wall of the housing (1) is sealed and fixedly provided with the intake flange (5), and the intake flange (5) is provided with an intake channel (9) penetrating and cooperating with the turbine rotor (6).

2. The integrated gas expansion generator according to claim 1, characterized in that: The power generation assembly comprises a generator stator (10), a generator rotor (11), a middle bearing seat (12) and an end bearing seat (13); the middle bearing seat (12) and the end bearing seat (13) are both fixedly arranged in the housing (1), and the end bearing seat (13) is arranged close to the outlet end cover (3); the generator stator (10) is fixedly arranged on the inner wall of the housing (1); the generator rotor (11) is coaxially arranged on the generator stator (10) and one end is connected to the end bearing seat (13); the other end of the generator rotor (11) passes through the middle bearing seat (12) and is coaxially fixedly connected to the turbine rotor (6).

3. The integrated gas expansion generator according to claim 2, characterized in that: A first bearing (14) is provided between the generator rotor (11) and the middle bearing seat (12), and a second bearing (15) is provided between the end bearing seat (13) and the middle bearing seat (12).

4. An integrated gas expansion generator according to claim 2 or 3, characterized in that: A first mounting groove (16) is provided on the end of the housing (1), and the end bearing seat (13) is fixedly arranged in the first mounting groove (16).

5. An integrated gas expansion generator according to claim 2 or 3, characterized in that: A limiting protrusion (17) is fixedly provided on the inner wall of the housing (1), and the limiting protrusion (17) is provided between the middle bearing seat (12) and the air inlet flange (5).

6. An integrated gas expansion generator according to any one of claims 1 to 3, characterized in that: A second mounting groove (18) is provided on the end of the housing (1), and the flow guide (4) is fixedly arranged in the second mounting groove (18).

7. An integrated gas expansion generator according to any one of claims 1 to 3, characterized in that: The first exhaust passage (7), the second exhaust passage (8) and the turbine rotor (6) are coaxially arranged.

8. An integrated gas expansion generator according to any one of claims 1 to 3, characterized in that: The inner wall of the second exhaust channel (8) is trumpet-shaped.

9. An integrated gas expansion generator according to any one of claims 1 to 3, characterized in that: The housing (1) is provided with a flow pipe (19), one end of the flow pipe (19) is communicated with the interior of the outlet end cover (3), and the other end of the flow pipe (19) is communicated with the second exhaust channel (8).

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