Sufficient heat dissipation type gas expansion generator

Abstract

The utility model discloses a full heat dissipation type gas expansion generator which comprises a motor assembly, an exhaust end cover is fixed at one end of a shell in a sealed mode, a sealing end cover is fixed at the other end of the shell in a sealed mode, the motor assembly is fixedly arranged in the shell, and an input shaft is coaxially and fixedly arranged on the motor assembly. A turbine rotor is coaxially and fixedly arranged on the input shaft and arranged between the motor assembly and the sealing end cover, an air inlet flange is fixedly arranged on the shell in a sealed mode, an air inlet channel matched with the turbine rotor is formed in the air inlet flange, a flow guide body is fixedly arranged on the inner wall of the shell in a sealed mode, and an airflow channel is formed between the motor assembly and the shell. The exhaust end cover is provided with an exhaust channel matched with the airflow channel. 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 a fully heat-dissipating gas expansion generator. Background Art

[0002] During the extraction, purification, and transportation of natural gas, pressure differentials are used to transport it. This flowing natural gas possesses a certain amount of energy that can be used for power generation. Existing power generation devices that utilize pressure differential energy typically consist of an expander, a reducer, and a generator. High-pressure natural gas flows through the expander, and the pressure differential energy is converted by a gas turbine, which typically operates at speeds between 10,000 and 50,000 rpm. The reducer, connected to the expander's output shaft, is external, not within the flowing natural gas pipeline and operates at atmospheric pressure. Therefore, the high-speed expander output shaft is exposed to high-pressure natural gas on one end and atmospheric air on the other. This requires a robust and reliable dynamic seal structure and gas leakage protection components, but this still does not address the risk of natural gas leakage, posing a safety risk to the entire power generation equipment. The presence of dynamic seals also hinders the long-term stability of the equipment. Furthermore, the generator generates a significant amount of heat during power generation, which can negatively impact the generator's performance. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a fully heat-dissipating gas expansion generator.

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

[0005] A fully heat-dissipating gas expansion generator comprises a shell, an exhaust end cover, a sealing end cover, an air intake flange, a flow guide, a turbine rotor and a motor assembly, wherein the exhaust end cover is sealingly fixed to one end of the shell, the sealing end cover is sealingly fixed to the other end of the shell, the motor assembly is fixedly arranged in the shell, an input shaft is coaxially fixed on the motor assembly, the turbine rotor is coaxially fixed on the input shaft, the turbine rotor is arranged between the motor assembly and the sealing end cover, the air intake flange is sealingly fixed on the shell, an air intake channel cooperating with the turbine rotor is provided on the air intake flange, the air intake channel cooperating with the turbine rotor is sealingly fixed on the inner wall of the shell, an air flow channel is provided between the motor assembly and the shell, and an exhaust channel cooperating with the air flow channel is provided on the exhaust end cover.

[0006] Furthermore, the motor assembly includes a generator stator, a generator rotor, a middle support frame and an end support frame, the middle support frame is fixedly arranged on the middle part of the shell, one end of the generator rotor is rotatably arranged on the middle support frame, the other end of the generator rotor is coaxially fixedly connected to one end of the input shaft, the other end of the input shaft is rotatably fixedly arranged on the end support frame, the end support frame is fixedly arranged on the middle part of the shell, the generator stator is coaxially sleeved on the generator rotor and fixedly connected to the inner wall of the shell, the air flow channel is arranged between the generator stator and the shell, and the middle support frame is provided with an air flow hole that passes through and cooperates with the air flow channel.

[0007] Furthermore, the generator rotor is arranged on the middle support frame through a first bearing, and the input shaft is arranged on the end support frame through a second bearing.

[0008] Furthermore, a guide cone is coaxially fixedly provided on the end of the generator rotor, and the guide cone is coaxially provided with the exhaust passage.

[0009] Furthermore, a guide cone is coaxially fixedly provided on the input shaft, one end of the guide cone cooperates with the turbine rotor, and the other end of the guide cone cooperates with the generator stator.

[0010] Furthermore, a first inner conical surface cooperating with the turbine rotor is provided on one end of the guide body, and a second inner conical surface cooperating with the guide cone is provided on the other end of the guide body, and the first inner conical surface and the second inner conical surface are connected by an arc surface transition.

[0011] Furthermore, the cross section of the generator stator is gear-shaped.

[0012] Furthermore, a mounting groove is provided on the end of the shell, and the end support frame is fixedly provided in the mounting groove.

[0013] Furthermore, sealing rings are provided between the exhaust end cover and the sealing end cover and the housing respectively.

[0014] Furthermore, an explosion-proof junction box is sealed and fixedly provided on the outer wall of the shell.

[0015] The beneficial effects of the utility model are:

[0016] 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.

[0017] 2) In this technology, the generator has a simple structure, low manufacturing cost, and can fully utilize the pressure difference energy of natural gas.

[0018] 3) In this technology, an air flow channel is provided between the generator stator and the housing, and the air flow channel can effectively remove the heat generated by the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram of the connection structure between the expander, reducer and generator in the prior art;

[0020] Figure 2 This is a schematic diagram of the connection structure of the gas expansion generator;

[0021] In the figure, 1-housing, 2-exhaust end cover, 3-sealing end cover, 4-inlet flange, 5-guiding body, 6-turbine rotor, 7-input shaft, 8-intake channel, 9-air flow channel, 10-exhaust channel, 11-generator stator, 12-generator rotor, 13-middle support frame, 14-end support frame, 15-air flow hole, 16-guiding cone, 17-guide cone, 18-mounting slot, 19-explosion-proof junction box. DETAILED DESCRIPTION

[0022] 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.

[0023] See Figure 2 , the utility model provides a technical solution:

[0024] A fully heat-dissipating gas expansion generator comprises a housing 1, an exhaust end cover 2, a sealing end cover 3, an air inlet flange 4, a flow guide 5, a turbine rotor 6, and a motor assembly. The exhaust end cover 2 is sealed and fixed to one end of the housing 1, and the sealing end cover 3 is sealed and fixed to the other end of the housing 1. The motor assembly is fixedly mounted within the housing 1, and an input shaft 7 is coaxially fixed to the motor assembly. The turbine rotor 6 is coaxially fixed to the input shaft 7. The turbine rotor 6 is disposed between the motor assembly and the sealing end cover 3. The housing 1 is sealed and fixed with an air inlet flange 4, and an air inlet passage 8 is provided on the air inlet flange 4, which cooperates with the turbine rotor 6. The housing 1 inner wall is sealed and fixed with a flow guide 5, which cooperates with the turbine rotor 6. An air flow passage 9 is provided between the motor assembly and the housing 1, and the exhaust end cover 2 is provided with an exhaust passage 10, which cooperates with the air flow passage 9. Sealing rings are provided between the exhaust end cover 2 and the sealing end cover 3 and the housing 1, respectively. An explosion-proof junction box 19 is sealed and fixed to the outer wall of the housing 1. The exhaust end cover 2 and the sealing end cover 3 are respectively fixed to the two ends of the housing 1 by bolts. The provision of a sealing ring ensures that the motor housing composed of the housing 1, the exhaust end cover 2 and the sealing end cover 3 has a better sealing effect. The exhaust end cover 2 and the intake flange 4 are respectively connected to the natural gas transmission pipeline in a sealed manner. Natural gas enters from the intake channel 8 on the intake flange 4, and then drives the turbine rotor 6 to rotate. The turbine rotor 6 drives the motor assembly to generate electricity through the input shaft 7. The natural gas then drives the heat in the generator through the air flow channel 9 and is finally discharged from the exhaust channel 10 on the exhaust end cover 2. The structure of the entire gas expansion generator is simple, which not only solves the problem of natural gas leakage, but also solves the problem of inconvenient cooling of the built-in generator. The explosion-proof junction box 19 is a prior art and is used to connect the power transmission line.

[0025] In some embodiments, the motor assembly includes a generator stator 11, a generator rotor 12, a central support frame 13, and an end support frame 14. The central support frame 13 is fixedly mounted in the center of the housing 1. One end of the generator rotor 12 is rotatably mounted on the central support frame 13. The other end of the generator rotor 12 is coaxially fixedly connected to one end of the input shaft 7. The other end of the input shaft 7 is rotatably mounted on the end support frame 14. The end support frame 14 is fixedly mounted in the center of the housing 1. The generator stator 11 is coaxially sleeved on the generator rotor 12 and fixedly connected to the inner wall of the housing 1. An airflow channel 9 is disposed between the generator stator 11 and the housing 1. The central support frame 13 is provided with an airflow hole 15 extending therethrough and cooperating with the airflow channel 9. The generator rotor 12 is mounted on the central support frame 13 via a first bearing, and the input shaft 7 is mounted on the end support frame 14 via a second bearing. The generator stator 11 has a gear-shaped cross-section. A mounting slot 18 is provided at the end of the housing 1, and the end support frame 14 is fixedly mounted in the mounting slot 18. The generator stator 11, generator rotor 12, first bearing, and second bearing are all conventional. Generator rotor 12 is coaxially fixedly connected to input shaft 7. Under the action of the first and second bearings, turbine rotor 6 can better drive generator rotor 12 to rotate on middle support frame 13 and end support frame 14. After the generator rotor 12 rotates, it cooperates with generator stator 11 to generate electricity. Mounting slots 18 are provided primarily to secure end support frames 14 and prevent them from moving. Middle support frame 13 is coaxially welded to the interior of housing 1. Generator stator 11 has a gear-like cross-section, with airflow channel 9 formed between adjacent teeth. Generator stator 11 is also connected to the inner wall of housing 1 via a fixed bracket, on which airflow channel 9 is provided. Airflow holes 15 cooperate with airflow channel 9 to enable natural gas circulation.

[0026] In some embodiments, a guide cone 16 is coaxially fixedly mounted on the end of the generator rotor 12, and the guide cone 16 is coaxially disposed with the exhaust passage 10. The conical surface of the guide cone 16 acts as a flow stabilizer, effectively preventing instability in the natural gas discharged from the exhaust passage 10.

[0027] In some embodiments, a guide cone 17 is coaxially fixedly mounted on the input shaft 7. One end of the guide cone 17 engages with the turbine rotor 6, and the other end of the guide cone 17 engages with the generator stator 11. The guide cone 17 is fixed to the input shaft 7, with the end of the guide cone 17 loosely fitting with the end of the generator stator 11. The guide cone 17 guides the natural gas through the airflow channel 9, effectively removing heat generated by the motor assembly and thereby adequately cooling the generator.

[0028] In some embodiments, one end of the guide body 5 is provided with a first inner conical surface that mates with the turbine rotor 6, and the other end of the guide body 5 is provided with a second inner conical surface that mates with the guide cone 17. The first and second inner conical surfaces are connected by an arc surface. The provision of the first and second inner conical surfaces and the arc surface allows for smoother flow of natural gas and reduces resistance.

[0029] 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.

[0030] 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.

[0031] 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. A fully heat-dissipating gas expansion generator, characterized in that: The invention comprises a housing (1), an exhaust end cover (2), a sealing end cover (3), an air inlet flange (4), a body guide (5), a turbine rotor (6) and a motor assembly, wherein the exhaust end cover (2) is sealed and fixed on one end of the housing (1), the sealing end cover (3) is sealed and fixed on the other end of the housing (1), the motor assembly is fixedly arranged in the housing (1), an input shaft (7) is coaxially fixed on the motor assembly, the turbine rotor (6) is coaxially fixed on the input shaft (7), and the turbine rotor (6) is arranged The invention relates to a turbine housing (1) and a turbine housing (2). The turbine housing (1) is provided with an air intake flange (4) which is fixedly and sealed to the housing (1). The air intake flange (4) is provided with an air intake channel (8) which cooperates with the turbine rotor (6). The inner wall of the turbine housing (1) is provided with a flow guide (5) which cooperates with the turbine rotor (6). An air flow channel (9) is provided between the motor assembly and the housing (1). The exhaust end cover (2) is provided with an exhaust channel (10) which cooperates with the air flow channel (9).

2. The fully heat dissipating gas expansion generator according to claim 1, characterized in that: The motor assembly comprises a generator stator (11), a generator rotor (12), a middle support frame (13) and an end support frame (14); the middle support frame (13) is fixedly arranged on the middle part of the housing (1); one end of the generator rotor (12) is rotatably arranged on the middle support frame (13); the other end of the generator rotor (12) is coaxially fixedly connected to one end of the input shaft (7); the other end of the input shaft (7) is rotatably fixedly arranged on the end support frame (14); the end support frame (14) is fixedly arranged on the middle part of the housing (1); the generator stator (11) is coaxially sleeved on the generator rotor (12) and fixedly connected to the inner wall of the housing (1); the air flow channel (9) is arranged between the generator stator (11) and the housing (1); and the middle support frame (13) is provided with an air flow hole (15) that penetrates and cooperates with the air flow channel (9).

3. The fully heat dissipating gas expansion generator according to claim 2, characterized in that: The generator rotor (12) is arranged on the middle support frame (13) through a first bearing, and the input shaft (7) is arranged on the end support frame (14) through a second bearing.

4. A fully heat dissipating gas expansion generator according to claim 2 or 3, characterized in that: A guide cone (16) is coaxially fixedly arranged on the end of the generator rotor (12), and the guide cone (16) is coaxially arranged with the exhaust passage (10).

5. A fully heat dissipating gas expansion generator according to claim 2 or 3, characterized in that: A guide cone (17) is coaxially fixedly provided on the input shaft (7), one end of the guide cone (17) cooperates with the turbine rotor (6), and the other end of the guide cone (17) cooperates with the generator stator (11).

6. The fully heat dissipating gas expansion generator according to claim 5, characterized in that: A first inner conical surface cooperating with the turbine rotor (6) is provided on one end of the guide body (5), and a second inner conical surface cooperating with the guide cone (17) is provided on the other end of the guide body (5), and the first inner conical surface and the second inner conical surface are connected by an arc surface transition.

7. A fully heat dissipating gas expansion generator according to claim 2 or 3, characterized in that: The cross section of the generator stator (11) is gear-shaped.

8. The fully heat dissipating gas expansion generator according to claim 2 or 3, characterized in that: An installation groove (18) is provided on the end of the shell (1), and the end support frame (14) is fixedly arranged in the installation groove (18).

9. The fully heat dissipating gas expansion generator according to claim 1, characterized in that: Sealing rings are provided between the exhaust end cover (2) and the sealing end cover (3) and the housing (1).

10. A fully heat dissipating gas expansion generator according to any one of claims 1 to 3, characterized in that: An explosion-proof junction box (19) is sealed and fixedly provided on the outer wall of the housing (1).

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