Gas pipeline generator

Abstract

The present invention belongs to the field of pipeline generators, and proposes a gas pipeline generator, including an axially distributed front connecting pipe head, a rear connecting pipe head, a generator housing, a stator assembly, a rotor assembly and an impeller, wherein the rotor assembly includes a rotor core, a salient pole, an excitation coil and a slip ring, and the sliding contact end of the slip ring is provided with a brush, a wire and an excitation device, the rotor core is a hollow structure and its two ends are respectively provided with a hollow front half shaft and a hollow rear half shaft with a through port, the opposite surfaces of the front half shaft and the rear half shaft are connected by a claw structure transmission, a rear sealing support and a rear port rolling sealing support are provided between the rear half shaft and the rear connecting pipe head, and a front sealing support and a front port sealing support are provided between the front half shaft and the front connecting pipe head. The device is reasonably designed, coaxial with the gas pipeline, has good sealing performance, high explosion-proof performance, is conducive to improving power generation performance and actual service life, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline generators, and particularly relates to a gas pipeline generator. Background Art

[0002] A gas pipeline is a special pipeline for transporting combustible gas. Due to the transportation and storage of a large amount of gas, it is usually transported in a cryogenic liquefied and high-pressure state. When the gas passes through the intermediate storage station, it needs to be throttled and depressurized for downstream users. By using a gas pipeline generator, a large amount of pressure energy generated by depressurization can be recovered and utilized. Especially after being converted into electric energy, the purpose of energy conservation can be achieved, and the gas can be fully and comprehensively utilized.

[0003] At present, most pipeline generators adopt the method of eccentrically installing the impeller / guide wheel, and the rotor is coaxially driven by the guide wheel. For example, a pipeline generator disclosed in CN201513280U includes a pipe body and a cover body arranged outside the pipe body. A wheel shaft is arranged in the cover body, an impeller is arranged on the wheel shaft, and one or two power generation components connected to one end or both ends of the wheel shaft are arranged on one side of the cover body. Since the utilization rate of gas pressure energy of this type of pipeline generator is relatively low, some pipeline generators adopt the structure of a hollow rotor shaft. For example, a reverse-rotating double-rotor natural gas pipeline power generation device disclosed in CN114320491A includes a support system, an inner rotor system, an electromagnetic induction system, and an outer rotor system. The electromagnetic induction system includes an iron core, a power generation coil, and a permanent magnet. However, the permanent magnet is used in this pipeline generator, which will increase the mass of the rotor system, resulting in a relatively large torque that needs to be overcome for the rotor to start rotating. Moreover, the magnetic field strength of the permanent magnet is not adjustable, which will also affect the power generation performance of the pipeline generator. Secondly, regarding this type of hollow coaxial pipeline generator, its sealing performance has a great impact on the explosion-proof performance and safety performance of the generator. Summary of the Invention

[0004] In view of the above technical problems existing in the pipeline generator, the present invention provides a gas pipeline generator with reasonable design, coaxial with the gas pipeline, good sealing performance, high explosion-proof performance, and conducive to improving power generation performance.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the gas pipeline generator provided by the present invention includes a front connection pipe head and a rear connection pipe head axially distributed. A generator housing is arranged between the front connection pipe head and the rear connection pipe head. A live wire joint and a neutral wire joint are arranged on the generator housing. Inside the generator housing, there are a stator assembly, a rotor assembly, and an impeller coaxially connected to the rotor assembly. The stator assembly includes a stator core and three groups of coils. The three groups of coils are distributed in 18 magnetic flux slots on the stator core and lead out three live wires and one neutral wire. The rotor assembly includes a rotor core. Six evenly distributed salient poles are arranged on the rotor core. Excitation coils are arranged on the salient poles. Slip rings are arranged at the connection ends of the excitation coils. Brushes are arranged at the sliding contact ends of the slip rings. One end of the brush facing away from the slip ring is connected to an excitation device through a wire. Inside the excitation device, there are an excitation regulator, an excitation power supply, and an excitation resistor. The rotor core is of a hollow structure, and a hollow front half shaft and a hollow rear half shaft are respectively arranged at both ends thereof. The opposite surfaces of the front half shaft and the rear half shaft are connected by a claw type structure. Bearing bushes are arranged between the front half shaft and the rear half shaft and the rotor core. The rear half shaft is connected to the impeller through an end shaft. A rear seal support is arranged between the rear half shaft and the rear connection pipe head. A rear port rolling seal support is arranged at the rear end of the rear seal support and the rear connection pipe head. The rear port rolling seal support is connected to the rim of the impeller. A through port for allowing gas to pass through the rotor assembly is arranged on the shaft side surface of the rear half shaft. A front seal support is arranged between the front half shaft and the front connection pipe head. The shaft side surface of the front half shaft is used for installing a slip ring. A front port seal support is arranged at a position near the end of the front half shaft. The front port seal support and the front seal support are nested to form an assembly cavity. Heat dissipation fins connected to the front half shaft are arranged in the assembly cavity.

[0006] Preferably, the brush includes a connection seat. The connection seat is connected to the inner wall of the front seal support. A live slot is arranged at the end of the connection seat facing the front half shaft. A carbon pole is arranged in the live slot. A spring is arranged between the carbon pole and the live slot. The wire penetrates through the front seal support and the generator housing and is connected to the excitation power supply.

[0007] Preferably, the generator housing includes a main housing. T-shaped flange plates are arranged at both ends of the main housing. The two T-shaped flange plates correspond to the front connection pipe head and the rear connection pipe head respectively and are connected by flange bolts. A rubber ring plate is arranged at the waist of the T-shaped flange plate. A card slot for clamping the flange bolts is arranged on the inner wall of the rubber ring plate. An outer ring plate is arranged between one end of the generator housing and the waist of the T-shaped flange. A wire groove for leading out wires is formed between the inner wall of the outer ring plate and the waist of the T-shaped flange. A through hole corresponding to the excitation device and used for passing wires is arranged on the outer ring plate.

[0008] Preferably, the front seal support is of a groove structure. The outer side surface of the front seal support is nested and fitted with the inner wall of the generator housing. The two ends of the front seal support are respectively in sealed nested fit with one end surface of the rotor assembly and the front port seal support, and the center of the front seal support is in limit fit with the bearing shell.

[0009] Preferably, the rear seal support is of a groove structure. The outer side surface of the rear seal support is nested and fitted with the inner wall of the generator housing. The two ends of the rear seal support are respectively in sealed nested fit with the other end surface of the rotor assembly and the rear port rolling seal support, and the center of the rear seal support is in limit fit with the bearing shell.

[0010] Preferably, the end shaft includes a core shaft section that is key-connected to the center of the impeller. A T-shaped part that is countersunk-connected to the end of the impeller is arranged at the end of the core shaft section. Six anti-loosening screws that are circularly arrayed and connect the T-shaped part and the impeller are arranged on the T-shaped part. An axle cap is arranged at the other end of the core shaft section. The axle cap is nested with the rear half shaft, and a plurality of transmission keys and key grooves are arranged on the nested surface of the two.

[0011] Preferably, the rear port rolling seal support is a hollow groove structure and its groove bottom is connected to the impeller. A plurality of structural holes that are distributed around the rim of the impeller are arranged at the groove bottom of the rear port rolling seal support. A plurality of support balls are arranged between the docking surface of the rear port rolling seal support and the rear connecting pipe head.

[0012] Preferably, one end of the front half shaft facing the front connecting pipe head is a Venturi bell mouth. A ring groove for installing a slip ring is arranged on the outer side surface of the Venturi bell mouth. The front port seal support includes a core pipe sleeve that is nested with the end of the Venturi bell mouth. A sealing ring is arranged between the core pipe sleeve and the Venturi bell mouth. A sealing ring plate is arranged on the side surface of the core pipe sleeve. A sleeve cover that is in limit fit with the front connecting pipe head is arranged at the edge of the sealing ring plate. A stepped opening that is nested with the front seal support is arranged at the edge of the sleeve cover.

[0013] Preferably, a plurality of axially uniformly distributed heat dissipation air gap grooves are arranged on the surface of the salient pole facing the stator core.

[0014] Preferably, shaft shoulders are arranged on the shaft side surfaces of the front half shaft and the rear half shaft. The shaft shoulders are in fit with the sunk openings arranged at the ends of the rotor core. An axle bearing groove for installing an axle bearing is formed between the shaft shoulders and the front seal support and the rear seal support. The claw type structure includes a plurality of claw blocks arranged at the end of the front half shaft. The plurality of claw blocks are circularly arrayed and are respectively in one-to-one fit with the claw grooves arranged at the end of the rear half shaft.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] 1. The gas pipeline generator provided by the present invention is a three-phase AC generator. It adopts a rotor assembly with a hollow structure, which is coaxially connected to the gas pipeline. And an electromagnet conforming to the principle of an electromagnet is formed by using an excitation device, slip rings and the rotor assembly. On the one hand, it is beneficial to reduce the mass of the rotor assembly and improve the efficiency of the gas flow pushing the impeller to rotate. On the other hand, the magnetic field intensity can be adjusted, which is beneficial to improving the power generation performance of the generator. Moreover, by adopting a front sealing support, a front port sealing support, a rear sealing support and a rear port rolling sealing support, the coaxiality and sealing performance of the rotor assembly and the impeller in the generator housing can be effectively improved, and it is beneficial to improve the explosion-proof performance of the device and extend the actual service life of the device. This device is reasonably designed, coaxially arranged with the gas pipeline, has good sealing performance, high explosion-proof performance and is beneficial to improving the power generation performance, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a sectional view of the gas pipeline generator provided for the embodiment in the D-D direction;

[0019] Figure 2 It is an isometric view of the gas pipeline generator provided for the embodiment;

[0020] Figure 3 It is a front view of the gas pipeline generator provided for the embodiment;

[0021] Figure 4 It is a sectional view of the gas pipeline generator provided for the embodiment in another direction;

[0022] Figure 5 It is an exploded view of the rear half shaft, end shaft and rear port rolling sealing support provided for the embodiment;

[0023] Figure 6 It is an exploded view of a partial structure of the rotor assembly provided for the embodiment;

[0024] Figure 7 It is a schematic structural view of the rotor core provided for the embodiment;

[0025] In the above figures, 1, front connecting pipe head; 2, rear connecting pipe head; 3, generator housing; 31, live wire connector; 32, neutral wire connector; 33, main housing; 34, T-shaped flange plate; 35, rubber gasket plate; 351, card slot; 36, outer ring plate; 37, wire slot; 38, perforation; 4, stator assembly; 41, stator core; 42, coil; 5, rotor assembly; 51, rotor core; 52, salient pole; 53, exciting coil; 54, front half shaft; 541, Venturi bell mouth; 542, annular groove; 55, rear half shaft; 551, through port; 56, claw type structure; 561, claw block; 562, claw groove; 57, bearing bush; 58, end shaft; 581, core shaft section; 582, T-shaped part; 583, shaft cover; 584, transmission key; 585, keyway; 59, heat dissipation air gap groove; 6, impeller; 7, slip ring; 8, brush; 81, connecting seat; 82, carbon pole; 83, spring; 9, exciting device; 91, exciting regulator; 92, exciting power supply; 93, exciting resistor; 10, rear seal support; 11, rear port rolling seal support; 111, structural hole; 112, support ball; 12, front seal support; 13, front port seal support; 131, core tube sleeve; 132, sealing ring; 133, sealing gasket plate; 134, sleeve cover; 14, assembly cavity; 15, heat dissipation fin. Detailed implementation manner

[0026] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For the convenience of narration, words such as "upper", "lower", "left" and "right" hereinafter only represent the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0027] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0028] Embodiment, such as Figures 1 to 7As shown in the figure, the gas pipeline generator provided by the present invention includes a front connection pipe head 1 and a rear connection pipe head 2 which are axially distributed. A generator housing 3 is arranged between the front connection pipe head 1 and the rear connection pipe head 2. A live wire connector 31 and a neutral wire connector 32 are arranged on the generator housing 3. Inside the generator housing 3, there are a stator assembly 4, a rotor assembly 5 and an impeller 6 coaxially connected to the rotor assembly 5. The stator assembly 4 includes a stator core 41 and three groups of coils 42. The three groups of coils 42 are distributed in 18 magnetic flux slots on the stator core 41 and lead out three live wires and one neutral wire. The rotor assembly 5 includes a rotor core 51, and six evenly distributed salient poles 52 are arranged on the rotor core 51. Among them, this generator is a three-phase AC generator, the three groups of coils 42 are three-phase windings, and the three groups of coils 42 are star-connected, which can reduce the starting current of this device and has good current stability. The impeller 6 is installed in the inlet section of the gas flow and is used to convert the pressure energy and kinetic energy of the gas flow into the mechanical energy of the rotor assembly 5, and then carry out the subsequent electromagnetic power generation process.

[0029] On this basis, an exciting coil 53 is arranged on the salient pole 52 provided by the present invention. A slip ring 7 is arranged at the connection end of the exciting coil 53. A brush 8 is arranged at the sliding contact end of the slip ring 7. One end of the brush 8 facing away from the slip ring 7 is connected to an exciting device 9 through a wire. Inside the exciting device 9, there are an excitation regulator 91, an excitation power supply 92 and an excitation resistor 93. Among them, the excitation power supply 92, the excitation resistor 93, the wire and the brush 8 form a current loop. The input current in this current loop is less than the output current generated by the power generation of this device. Moreover, the excitation power supply 92 can also access the generated current of the generator through a wire. When the generator is working, electrical energy is stored inside the excitation power supply 92, which is beneficial to improving the electrical energy utilization rate of this device. When the current loop is working, the brush 8 is in sliding contact connection with the slip ring 7, which can connect the slip ring 7 and the exciting coil 53 to access direct current, so that the rotor core 51 becomes an electromagnet. In this way, using the electromagnet structure for induction power generation, on the one hand, it is beneficial to reduce the mass of the rotor assembly 5 and reduce the torque that needs to be overcome when the rotor assembly 5 rotates, which is beneficial to improving the efficiency of the gas flow pushing the impeller 6 to rotate. On the other hand, the excitation regulator 91 adjusts the current in the current loop according to the real-time power generation situation and the release situation of the gas pressure energy, so as to adjust the magnetic field strength, which is beneficial to improving the power generation performance of the generator.

[0030] Furthermore, the rotor core 51 provided by the present invention has a hollow structure, and a hollow front half shaft 54 and a hollow rear half shaft 55 are respectively arranged at both ends thereof. The opposite surfaces of the front half shaft 54 and the rear half shaft 55 are drivingly connected through a claw type structure 56. Bearing bushes 57 are arranged between the front half shaft 54 and the rear half shaft 55 and the rotor core 51. The rear half shaft 55 is drivingly connected with the impeller 6 through an end shaft 58. A rear seal support 10 is arranged between the rear half shaft 55 and the rear connecting pipe head 2. A rear port rolling seal support 11 is arranged at the rear end of the rear seal support 10 and the rear connecting pipe head 2. The rear port rolling seal support 11 is connected with the rim of the impeller 6. A gas passage port 551 for allowing gas to pass through the rotor assembly 5 is arranged on the shaft side surface of the rear half shaft 55. A front seal support 12 is arranged between the front half shaft 54 and the front connecting pipe head 1. The shaft side surface of the front half shaft 54 is used for installing a slip ring 7. A front port seal support 13 is arranged at a position close to the end of the front half shaft 54. The front port seal support 13 and the front seal support 12 are nested to form an assembly cavity 14. Heat dissipation fins connected to the front half shaft 54 are arranged in the assembly cavity 14. Among them, the heat dissipation fins can rotate synchronously with the front half shaft 54 in the assembly cavity 14 to improve the heat dissipation performance inside the device, and heat exchange can be realized by opening holes at appropriate positions on the generator housing 3.

[0031] Specifically, the present invention uses the front seal support 12 and the rear seal support 10 to seal both ends of the rotor assembly 5 to prevent gas from entering the core power generation components of the device, namely the stator assembly 4 and the rotor assembly 5. At the same time, it provides support for the front half shaft 54 and the rear half shaft 55. The bearing bushes 57 ensure that the front half shaft 54 and the rear half shaft 55 maintain relatively small friction during rotation and have smooth rotation. The front port seal support 13 is divided into an outer support section and an inner support section through the annular port on its end face. The excitation coil 53 is connected to the slip ring 7 from the annular port, and is used to establish an electrical connection relationship between the excitation coil 53 and the slip ring 7. The front port seal support 13 is mainly used to support the front half shaft 54 as the air outlet end, and at the same time can form a cavity with better sealing performance with the front seal support 12 to prevent gas from leaking from the docking section of the generator housing 3 and the front connecting pipe head 1, and also provides a reasonable sealing space for the slip ring 7 and the carbon brush 8, which is beneficial to ensuring the electrical working performance of the rotor assembly 5. The rear port rolling seal support 11 is used to support the impeller 6 on the one hand, providing good coaxial support for the impeller 6. On the other hand, it reduces the rotational friction between the impeller 6 and the rotor assembly 5 through its rolling cooperation with the rear connecting pipe head 2, which is beneficial to improving the conversion efficiency of gas pressure energy into electrical energy. On the third hand, it ensures that the gas flow entering after being accelerated by the impeller 6 enters the rotor assembly 5 forward through the opening design.

[0032] By adopting the front seal support member 12, the front port seal support member 13, the rear seal support member 10 and the rear port rolling seal support member 11, the present invention can effectively improve the coaxiality of the rotor assembly 5 and the impeller 6 in the generator housing 3. The butt joint surface between the front seal support member 12 and the front port seal support member 13 is axially staggered with the butt joint surface between the generator housing 3 and the front connecting pipe head 1. The butt joint surface between the rear seal support member 10 and the rear port rolling seal support member 11 is axially staggered with the butt joint surface between the generator housing 3 and the front connecting pipe head 1. Therefore, the sealing performance of the internal structure assembly of the present device can be improved. In particular, a nested design is adopted at the butt joint positions of different structures, increasing the sealing area and sealing direction, and being beneficial to improving the explosion-proof performance and working safety of the present device, and being beneficial to extending the actual service life of the present device.

[0033] In order to improve the utilization rate of the carbon brush 8 in the present device, the carbon brush 8 provided by the present invention includes a connection seat 81. The connection seat 81 is connected to the inner wall of the front seal support member 12. An open slot is provided at the end of the connection seat 81 facing the front half shaft 54. A carbon electrode 82 is arranged in the open slot. A spring 83 is arranged between the carbon electrode 82 and the open slot. A wire penetrates through the front seal support member 12 and the generator housing 3 and is connected to the excitation power supply 92. Among them, the carbon electrode 82 is used for sliding contact with the slip ring 7. While the slip ring 7 rotates continuously with the rotor assembly 5, the carbon electrode 82 always maintains dynamic contact with the slip ring 7 under the elastic support of the spring 83. In this way, after direct current is connected to the current loop where the carbon brush is located, the slip ring 7 can connect the direct current to the excitation coil 53. The current-carrying excitation coil 53 makes the rotor core 51 become an electromagnet, so as to generate an induced electromotive force with the stator assembly 4 and complete the core action of power generation.

[0034] In order to improve the utilization rate of the generator housing 3, the generator housing 3 provided by the present invention includes a main housing 33, and T-shaped flange plates 34 are arranged at both ends of the main housing 33. The T-shaped flange plates 34 at both ends correspond to the front connecting pipe head 1 and the rear connecting pipe head 2 one by one and are connected by flange bolts. The waist of the T-shaped flange plate 34 is provided with a rubber ring plate 35 for shock absorption and rust prevention protection, and the inner wall of the rubber ring plate 35 is provided with a card groove 351 engaged with the flange bolts. An outer ring plate 36 is arranged between one end of the generator housing 3 and the waist of the T-shaped flange. The inner wall of the outer ring plate 36 and the waist of the T-shaped flange form a wire groove 37 for leading out the wire, and the outer ring plate 36 is provided with a through hole 38 corresponding to the excitation device 9 and used to insert the wire. Among them, the front connecting pipe head 1 and the rear connecting pipe head 2 have the same structure, both including a flange section docking with the T-shaped flange plate 34 and a convex gas flow section. The gas flow section of the front connecting pipe head 1 is the gas outlet section of the device, and the gas flow section of the rear connecting pipe head 2 is the gas intake section of the device. As for the T-shaped flange plate 34, on the one hand, the T-shaped flange plate 34 can provide a highly reliable connection relationship after being connected with the front connecting pipe head 1 and the rear connecting pipe head 2 through flange bolts; on the other hand, after being connected with the front connecting pipe head 1 and the rear connecting pipe head 2, an axial assembly position, that is, an axial limit surface, can be provided for the front port sealing support 13 and the rear port rolling sealing support 11, so that the front port sealing support 13 and the rear port rolling sealing support 11 can effectively support the front half shaft 54 ​​and the impeller 6 respectively.

[0035] In order to improve the assembly performance of the front sealing support 12, the front sealing support 12 provided by the present invention is a groove-type structure, the outer side surface of the front sealing support 12 is nested with the inner wall of the generator housing 3, the two ends of the front sealing support 12 are respectively sealed and nested with one end surface of the rotor assembly 5 and the front port sealing support 13, and the center of the front sealing support 12 is limitedly matched with the bearing 57. In this way, when the front sealing support 12 and the front port sealing support 13 are nested and assembled in the generator housing 3, the front end position of the rotor assembly 5 is effectively limited, and an axial support relationship can be formed with the bearing 57 to ensure the rotation performance of the rotor assembly 5 on the support surface of the bearing 57 and the support surface of the front sealing support 12; at the same time, by adopting the groove-type structure and the nested design, the structural sealing of the gas outlet section of the device can be effectively guaranteed, and the gas is prevented from being re-injected into the working space of the slip ring 7 and the brush 8 under the action of the fluid pressure.

[0036] In order to improve the assembly performance of the rear seal support 10, the rear seal support 10 provided by the present invention has a groove structure. The outer side surface of the rear seal support 10 is nested and fitted with the inner wall of the generator housing 3. The two ends of the rear seal support 10 are respectively in sealed nested fit with the other end surface of the rotor assembly 5 and the rear port rolling seal support 11. The center of the rear seal support 10 is in limit fit with the bearing bush 57. In this way, if the rear seal support 10 and the rear port seal support are nested and assembled in the generator housing 3, the rear end position of the rotor assembly 5 is effectively limited, and an axial support relationship can be formed with the bearing bush 57 to ensure the rotational performance of the rotor assembly 5 on the support surface of the bearing bush 57 and the support surface of the rear seal support 10. At the same time, by adopting the groove structure and nested design, the structural sealing performance of the intake section of the device can be effectively guaranteed, and gas is prevented from entering the rotor assembly 5.

[0037] In order to improve the transmission reliability between the impeller 6 and the rotor assembly 5, the end shaft 58 provided by the present invention includes a core shaft section 581 that is key-connected to the center of the impeller 6. At the end of the core shaft section 581, a T-shaped part 582 that is countersunk-connected to the end of the impeller 6 is provided. Six anti-loosening screws that are circularly arrayed and connect the T-shaped part 582 and the impeller 6 are provided on the T-shaped part 582. At the other end of the core shaft section 581, a shaft cover 583 is provided. The shaft cover 583 is nested with the rear half shaft 55, and a plurality of transmission keys 584 and key grooves 585 are provided on the nested surface of the two. In this way, the end shaft 58 is simultaneously transmission-connected to the impeller 6 and the rear half shaft 55 by means of key connection, and the T-shaped part 582 and a plurality of anti-loosening screws are used to connect the end shaft 58 and the impeller 6, which can effectively ensure the synchronous rotation performance between the impeller 6 and the rotor assembly 5. Moreover, the through port 551 provided on the rear half shaft 55 enables gas to enter the rear half shaft 55 after the impeller 6 accelerates, and then pass through the front half shaft 54 and the front connection pipe head 1 in an orderly manner. In this way, both the synchronous rotation of the impeller 6 and the rotor assembly 5 is ensured, and an effective gas passage is established, which can ensure the synchronous operation of the power generation function and the gas transmission function of the device.

[0038] In order to improve the sealing and supporting performance of the rear port rolling seal support member 11, in addition to nesting it with the rear seal support member 10 and the generator housing 3, it is also designed as a hollow groove structure and its groove bottom is connected to the impeller 6. The connection method between it and the impeller 6 can be welding or bolt connection. A plurality of structural holes 111 are arranged at the groove bottom of the rear port rolling seal support member 11 and are distributed around the rim of the impeller 6. A plurality of support balls 112 are arranged between the butt surface of the rear port rolling seal support member 11 and the rear connecting pipe head 2. In this way, the rear port rolling seal support member 11 rotates synchronously with the impeller 6, and the support balls 112 roll and support between the rear port rolling seal support member 11 and the rear connecting pipe head 2, thereby effectively improving the rotation efficiency of the impeller 6. It should be noted that the support balls 112 are highly mirror-polished and can be lubricated without grease or can be lubricated with grease. However, if lubricated with grease, a sealing end cover needs to be provided on the rear port rolling seal support member 11 to prevent the high-speed flowing gas from sucking away the grease.

[0039] In order to ensure the gas transmission efficiency, one end of the front half shaft 54 of the present invention facing the front connecting pipe head 1 is a Venturi bell mouth 541, and a ring groove 542 for installing the slip ring 7 is arranged on the outer side surface of the Venturi bell mouth 541. By adopting the Venturi bell mouth 541, the gas flow can be accelerated. And on the other hand, due to the design of the built-in slip ring 7 and the hollow rotor assembly 5, the diameter of the matching slip ring 7 is larger than that of the general one. And adopting the Venturi bell mouth 541 is beneficial to controlling the diameter of the slip ring 7 not to be too large, which is beneficial to current transmission and also beneficial to controlling the overall mass of the rotor assembly 5, and improves the power generation performance of the device to a certain extent.

[0040] Matched with the Venturi bell mouth 541, the front port seal support member 13 provided by the present invention includes a core tube sleeve 131 nested with the end of the Venturi bell mouth 541. A sealing ring 132 is arranged between the core tube sleeve 131 and the Venturi bell mouth 541. A sealing ring plate 133 is arranged on the side surface of the core tube sleeve 131. A cover 134 for limiting and cooperating with the front connecting pipe head 1 is arranged at the edge of the sealing ring plate 133. A stepped opening nested with the front seal support member 12 is arranged at the edge of the cover 134. In this way, the front port seal support member 13 designed by the present invention can establish a good sealing and supporting relationship with the end of the Venturi bell mouth 541, that is, the end of the front half shaft 54, thereby ensuring the explosion-proof and safety performance during the power generation process of the device.

[0041] Since the air gap between the stator assembly 4 and the rotor assembly 5 of the generator has a direct impact on its power generation performance, in order to improve the power generation performance of the present device, in addition to the original assembly gap between the stator assembly 4 and the rotor assembly 5, the present invention provides a plurality of axially uniformly distributed heat dissipation air gap grooves 59 on the surface of the salient pole 52 facing the stator core 41. By designing the heat dissipation air gap grooves 59, it can ensure a reasonable air gap between the stator assembly 4 and the rotor assembly 5 during the electromagnetic power generation process, and can also conduct a certain amount of heat dissipation, which is beneficial to improving the power generation performance of the present device.

[0042] In order to improve the transmission connection performance between the front half shaft 54 and the rear half shaft 55, the present invention provides shoulders on the shaft sides of both of them. The shoulders are matched with the sunk mouths provided at the ends of the rotor core 51, and the shoulders and the front seal support 12 and the rear seal support 10 form a bearing housing groove for installing the bearing 57. A spline groove in transmission cooperation with the rotor core 51 is provided on the outer side of the butt joint between the front half shaft 54 and the rear half shaft 55, so as to ensure the synchronous rotation performance of the front half shaft 54, the rear half shaft 55 and the rotor core 51, and the three-section connection can also better achieve the assembly.

[0043] Furthermore, the claw structure 56 includes a plurality of claw blocks 561 provided at the end of the front half shaft 54. The plurality of claw blocks 561 are distributed in a circular array and are in one-to-one cooperation with the claw grooves 562 provided at the end of the rear half shaft 55. Through the cooperation of the claw blocks 561 and the claw grooves 562, a stable transmission connection relationship can be established between the front half shaft 54 and the rear half shaft 55. Especially, the front half shaft 54, the rear half shaft 55 and the rotor core 51 are connected in a three-section manner, thereby ensuring the rotation performance of the rotor assembly 5 and realizing the function of gas transmission.

[0044] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A gas pipeline generator, comprising an axially distributed front connecting pipe head and a rear connecting pipe head, a generator housing is arranged between the front connecting pipe head and the rear connecting pipe head, a live wire connector and a neutral wire connector are arranged on the generator housing, a stator assembly, a rotor assembly and an impeller coaxially connected to the rotor assembly are arranged inside the generator housing, the stator assembly comprises a stator core and 3 groups of coils, the 3 groups of coils are distributed in 18 magnetic flux slots on the stator core and lead out 3 live wires and 1 neutral wire, the rotor assembly comprises a rotor core, characterized in that, The rotor core is provided with 6 evenly distributed salient poles, the salient poles are provided with excitation coils, the connection ends of the excitation coils are provided with slip rings, the sliding contact ends of the slip rings are provided with brushes, the end of the brushes facing away from the slip rings is connected to the excitation device through a wire, the excitation device is provided with an excitation regulator, an excitation power supply and an excitation resistor, the rotor core is a hollow structure and a hollow front half shaft and a hollow rear half shaft are provided at both ends, the opposite surfaces of the front half shaft and the rear half shaft are connected by a claw structure, bearings are provided between the front half shaft and the rear half shaft and the rotor core, the rear half shaft is connected to the impeller by an end shaft transmission, the A rear sealing support is provided between the rear half shaft and the rear connecting pipe head, a rear port rolling sealing support is provided at the rear ends of the rear sealing support and the rear connecting pipe head, the rear port rolling sealing support is connected to the rim of the impeller, a through hole for allowing the gas to pass through the rotor assembly is provided on the shaft side of the rear half shaft, a front sealing support is provided between the front half shaft and the front connecting pipe head, the shaft side of the front half shaft is used to install a slip ring, a front port sealing support is provided at a position close to the end of the front half shaft, the front port sealing support is nested with the front sealing support to form an assembly cavity, and a heat dissipation fin connected to the front half shaft is provided in the assembly cavity; The brush comprises a connection seat, the connection seat is connected to the inner wall of the front sealing support, the end of the connection seat facing the front half shaft is provided with a movable groove, a carbon pole is provided in the movable groove, a spring is provided between the carbon pole and the movable groove, and the wire penetrates the front sealing support and the generator housing to be connected to the excitation power supply; The generator housing comprises a main housing, and two ends of the main housing are provided with T-shaped flange plates, and the T-shaped flange plates at the two ends correspond to the front connecting pipe head and the rear connecting pipe head one by one and are connected by flange bolts, and a rubber ring plate is provided at the waist of the T-shaped flange plate, and a clamping groove clamped with the flange bolt is provided on the inner wall of the rubber ring plate, and an outer ring plate is provided between one end of the generator housing and the waist of the T-shaped flange, and the inner wall of the outer ring plate and the waist of the T-shaped flange form a wire groove for leading out the wire, and the outer ring plate is provided with a through hole corresponding to the excitation device and used to insert the wire; The front sealing support is a groove-shaped structure, the outer side of the front sealing support is nested with the inner wall of the generator housing, the two ends of the front sealing support are respectively sealed and nested with one end surface of the rotor assembly and the front port sealing support, and the center of the front sealing support is limitedly matched with the bearing bush; The rear sealing support is a groove-shaped structure, the outer side of the rear sealing support is nested with the inner wall of the generator housing, the two ends of the rear sealing support are respectively sealed and nested with the other end surface of the rotor assembly and the rear port rolling sealing support, and the center of the rear sealing support is limitedly matched with the bearing bush; The end shaft includes a core shaft section connected to the center key of the impeller, the end of the core shaft section is provided with a T-shaped piece connected to the end countersunk head of the impeller, the T-shaped piece is provided with 6 retaining screws distributed in a circular array and connecting the T-shaped piece and the impeller, the other end of the core shaft section is provided with a shaft cover, the shaft cover is nested with the rear half shaft and a plurality of transmission keys and keyways are provided on the nesting surfaces of the two.

2. The gas pipeline generator according to claim 1, characterized in that: The rear port rolling seal support is a hollow groove-shaped structure and its groove bottom is connected to the impeller. The groove bottom of the rear port rolling seal support is provided with a plurality of structural holes distributed around the rim of the impeller. The rear port rolling seal support is provided with a plurality of supporting balls between the mating surface between the rear port rolling seal support and the rear connecting pipe head.

3. The gas pipeline generator according to claim 1, characterized in that: The end of the front half shaft facing the front connecting pipe head is a Venturi-type bell mouth, and a ring groove for installing a slip ring is arranged on the outer side surface of the Venturi-type bell mouth, and the front port sealing support comprises a core tube sleeve nested with the end of the Venturi-type bell mouth, a sealing ring is arranged between the core tube sleeve and the Venturi-type bell mouth, a sealing ring plate is arranged on the side of the core tube sleeve, and a sleeve cover is arranged on the edge of the sealing ring plate for limiting cooperation with the front connecting pipe head, and a stepped opening is arranged on the edge of the sleeve cover for nesting with the front sealing support member.

4. The gas pipeline generator according to claim 1, characterized in that: The salient pole is provided with a plurality of heat dissipation air gap grooves evenly distributed in the axial direction on the surface facing the stator core.

5. The gas pipeline generator according to claim 1, characterized in that: The side surfaces of the front half-shaft and the rear half-shaft are both provided with shaft shoulders, which cooperate with the countersunk grooves provided at the ends of the rotor core, and the shaft shoulders and the front and rear sealing supports form bearing grooves for installing bearings. The claw structure includes a plurality of claw blocks provided at the ends of the front half-shaft, and the plurality of claw blocks are distributed in a circular array and cooperate one by one with the claw grooves provided at the ends of the rear half-shaft.

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