Pure ammonia gas magnetic suspension turbine power generation integrated unit

Abstract

This invention relates to the field of turbine expansion power generation technology, specifically disclosing a pure ammonia gas magnetic levitation turbine power generation integrated unit. It includes a turbine housing and a power generation housing connected by flanges at the front and rear. An air inlet is located at the end of the power generation housing furthest from the turbine housing. A power generation assembly is located inside the turbine housing, comprising a rotor, coil, and stator assembly, with the coil fixed to the outside of the rotor. This invention designs a medium channel and places the coil within a sealed cavity, allowing ammonia gas to enter the turbine housing, flow through the medium channel, and exit. This avoids contact between the ammonia gas and the coil during the process, thus preventing corrosion of the coil's copper wires. Simultaneously, a cooling section is provided inside the medium channel to cool the coil and stator assembly using ammonia gas. The locking structure design, using an outer and inner drive ring to tighten and compensate for screws, effectively prevents loosening of the screws over prolonged use, thereby increasing service life and reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of turbine expansion power generation technology, and in particular to a pure ammonia gas magnetic levitation turbine power generation integrated unit. Background Technology

[0002] In low-temperature geothermal applications, heat pipe heat exchange technology is typically used to generate a gaseous medium. Since ammonia is the most suitable heat exchange medium for low-temperature geothermal applications, liquid ammonia is injected underground, and the ammonia vapor generated by heat exchange is returned to the ground to utilize waste heat. The temperature of ammonia gas is usually around 50-60℃. Low-temperature waste heat is usually used for winter heating, but there are no good application methods in summer.

[0003] Existing technologies have proposed using a turbine expander generator with magnetic levitation bearings to recover geothermal energy. The advantages are good performance under varying operating conditions and high transmission efficiency. However, the disadvantages are high requirements for structural design and processing, because the reaction between ammonia and the copper wire of the motor will corrode the copper wire coil of the motor and affect its service life.

[0004] On the other hand, traditional turbine main structures generally use a combination of multiple sets of bolts and sealing strips to fix and seal the structure. Since the radial turbine expander works for a long time in an environment of impact, vibration and variable load, the bolt structure is prone to loosening, which will affect the sealing of the device. Since ammonia has a very small molecular weight and is toxic, it is easy to leak when the bolt structure becomes loose, which may even cause danger.

[0005] Based on this, those skilled in the art have proposed a pure ammonia gas maglev turbine power generation integrated unit, which provides a solution to the above-mentioned technical problems. Summary of the Invention

[0006] Therefore, it is necessary to provide a pure ammonia gas magnetic levitation turbine power generation unit to address the problems raised in the background technology.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The aforementioned pure ammonia maglev turbine-power generation integrated unit specifically includes a turbine housing and a power generation housing arranged front and rear and connected by flanges. An air inlet is provided at the end of the power generation housing away from the turbine housing, through which ammonia gas enters the power generation housing. A power generation assembly is located inside the turbine housing, comprising a rotor, a coil, and a stator assembly. The coil is fixed to the outside of the rotor and rotatably connected to the inside of the stator assembly. A turbine assembly for driving the rotor rotation is located inside the power generation housing. The turbine assembly includes a flow guide, a mounting end cover, and several screws. The flow guide is fixed to the inside of the power generation housing. A control ring is rotatably connected to the mounting end cover, and several nozzle blades are rotatably connected to the mounting end cover. Several screws are arranged in a circular array, fixing the control ring to the flow guide. The turbine assembly has a locking structure for locking the screws. The stator assembly includes several flow guide blades and an inner stator cylinder and an outer stator cylinder arranged inside and outside the turbine housing. The inner stator cylinder and the outer stator cylinder are connected by the several flow guide blades, and the outer stator cylinder is fixed to the inside of the turbine housing.

[0009] Optionally, a medium channel is formed between two adjacent guide vanes.

[0010] Optionally, a front magnetic levitation bearing and a rear magnetic levitation bearing are respectively installed on the outer side of the rotor and at both ends of the coil. The rotor is rotatably connected to the stator inner cylinder through the front magnetic levitation bearing and the rear magnetic levitation bearing. A front positioning shoulder is installed on the outer side of the front magnetic levitation bearing and is fitted onto the end of the stator inner cylinder. A pad is installed on the outer side of the rear magnetic levitation bearing. The end of the pad away from the coil abuts against the rear positioning shoulder. A cover plate is sealed on the outer side of the rear positioning shoulder away from the pad and on the outer side of the rotor. A front sealing cover is sealed on the outer side of the rotor and on the end of the front positioning shoulder away from the stator inner cylinder. A rear sealing cover is sealed on the end of the stator inner cylinder away from the front sealing cover. A sealing cavity is formed between the rear sealing cover, the cover plate, the rear positioning shoulder, the front sealing cover and the inner side of the stator inner cylinder.

[0011] Optionally, the guide vanes are a plurality of first guide vanes or third guide vanes arranged in a ring array.

[0012] Optionally, the guide vanes are a plurality of second guide vanes arranged in a symmetrical array on both sides.

[0013] Optionally, an impeller is fixed to one end of the rotor near the generator housing. The impeller is rotatably connected to the mounting end cover. A plurality of nozzle blades are arranged in a ring array on the outer periphery of the impeller. A plurality of connecting plates are fixed to the outer periphery of the guide shroud. The connecting plates are fixedly connected to the generator housing. An air intake channel is formed between the guide shroud and the generator housing. An air intake ring is fixed inside the generator housing and outside the impeller. The end of the air intake ring facing the turbine housing forms an outwardly opening diffuser. A guide ring is fitted on the outer side of the front positioning shoulder sleeve. The outer periphery of the guide ring is an arc-shaped surface that gradually diffuses outward from the end near the air intake ring.

[0014] Optionally, the medium channel, starting from one end near the guide ring, sequentially includes an air inlet section, a cooling section, and an air outlet section. The cooling section is located on the outer periphery of the coil, and the cross-sectional area of ​​the cooling section is larger than the cross-sectional area of ​​the air inlet section or the air outlet section.

[0015] Optionally, the control ring is rotatably connected to multiple sliders, the nozzle blade is provided with a groove adapted to the sliders, and the mounting end cover is also provided with a drive mechanism for controlling the rotation of the control ring.

[0016] Optionally, the locking structure includes a receiving groove formed on the mounting end cover, the end of the screw is located inside the receiving groove, an outer drive ring is rotatably connected inside the receiving groove and outside a plurality of screws, an inner drive ring is rotatably connected inside the receiving groove and inside a plurality of screws, both the outer drive ring and the inner drive ring are frictionally connected or meshed with the end of the screw, and a locking assembly is installed inside the receiving groove and between two adjacent screws.

[0017] Optionally, the locking assembly includes a connecting frame rotatably connected to the inner side of the receiving groove. An outer abutting wheel adapted to the outer transmission ring and an inner abutting wheel adapted to the inner transmission ring are respectively fixed above and below the connecting frame. The outer abutting wheel and the inner abutting wheel are located on the same side of the connecting frame. A driven wheel is fixed on the side of the connecting frame near the control ring. A drive groove is opened on the inner side of the control ring. A drive wheel is installed on the inner side of the drive groove. The driven wheel is located on the inner side of the drive groove and is engaged with the drive wheel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention designs a medium channel and places the coil inside a sealed cavity, allowing ammonia gas to enter the turbine housing, flow through the medium channel, and then exit. This avoids contact between the ammonia gas and the coil during the process, thus preventing corrosion of the coil's copper wires. At the same time, by setting a cooling section inside the medium channel, ammonia gas can be used to cool the coil and stator assembly.

[0020] This invention, through the design of the air inlet ring and the flow guide ring, can guide the ammonia gas entering the turbine housing, optimize its movement path, and allow it to enter the medium channel more smoothly, thereby improving its service life.

[0021] The present invention increases the volume of the cooling section by designing a second or third guide vane, thereby increasing the residence time of ammonia gas inside the cooling section and effectively improving the cooling effect on the coil and stator assembly.

[0022] This invention, through the design of a locking structure, uses an outer and inner transmission ring to tighten and compensate for the screws, effectively preventing the screws from loosening during prolonged use, thereby increasing their service life and reducing maintenance costs. Attached Figure Description

[0023] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the axial view structure of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention. Figure 1 ;

[0026] Figure 3 This is a cross-sectional view of the present invention. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the turbine housing of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the medium channel, stator outer cylinder, first guide vane, and stator inner cylinder of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the second guide vane of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the third guide vane of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the mounting end cap, control ring, and nozzle blades of the present invention.

[0032] Figure 9 This is a schematic diagram of the screw, outer drive ring, and inner drive ring of the present invention;

[0033] Figure 10 The mounting end cap is a structural schematic diagram of the connecting frame, outer abutment wheel, and inner abutment wheel of the present invention;

[0034] Figure 11 The front sealing cover is a structural schematic diagram of the driven wheel and the driving wheel of this invention.

[0035] The markings in the diagram are explained as follows:

[0036] 1. Turbine housing; 2. Generator housing; 3. Draft shield; 4. Impeller; 5. Nozzle blades; 6. Inlet ring; 7. Front magnetic levitation bearing; 8. Medium passage; 9. Stator outer cylinder; 10. Mounting end cover; 11. Front sealing cover; 12. Draft ring; 13. Front positioning shoulder; 14. Rotor; 15. Coil; 16. Gasket; 17. Rear positioning shoulder; 18. Cover plate; 19. Rear sealing cover one; 20. Rear magnetic levitation bearing; 21. Inlet passage; 22. Connecting plate; 3. Diffuser; 24. Positioning end face; 25. Mounting cavity; 26. Stator inner cylinder; 27. Air inlet; 28. First guide vane; 29. ​​Second guide vane; 30. Third guide vane; 31. Air inlet section; 32. Cooling section; 33. Air outlet section; 34. Control ring; 36. Slider; 37. Screw; 38. Outer transmission ring; 39. Inner transmission ring; 40. Connecting frame; 41. Outer abutment wheel; 42. Driven wheel; 43. Inner abutment wheel; 44. Drive wheel. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] Please refer to Figure 1-11The present invention provides a pure ammonia gas magnetic levitation turbine-power generation integrated unit, comprising a turbine housing 1 and a power generation housing 2 arranged front and rear and connected by flanges. An air inlet 27 is provided at the end of the power generation housing 2. A power generation assembly is provided inside the turbine housing 1, comprising a rotor 14, a coil 15, and a stator assembly. The coil 15 is fixed to the outside of the rotor 14 and rotatably connected to the inside of the stator assembly. A turbine assembly for driving the rotor 14 to rotate is provided inside the power generation housing 2. The turbine assembly includes a guide shroud 3, a mounting end cap 10, and several screws 37. The flow shield 3 is fixed inside the generator housing 2. A control ring 34 is rotatably connected to the mounting end cover 10. Several nozzle blades 5 are rotatably connected to the mounting end cover 10. Several screws 37 are arranged in a ring array and the control ring 34 is fixed to the flow shield 3. The turbine assembly is provided with a locking structure for locking several screws 37. The stator assembly includes several guide blades and an inner stator cylinder 26 and an outer stator cylinder 9 arranged inside and outside. The inner stator cylinder 26 and the outer stator cylinder 9 are connected by several guide blades. The outer stator cylinder 9 is fixed inside the turbine housing 1.

[0039] Specifically, a positioning end face 24 is provided on the inner side of the turbine housing 1. The space at one end of the positioning end face 24 inside the turbine housing 1 is set as a mounting cavity 25. The stator outer cylinder 9 is installed inside the mounting cavity 25 and abuts against the positioning end face 24. The positioning end face 24 serves as the mounting base surface of the stator outer cylinder 9, providing positioning for it.

[0040] Please refer to Figure 2-3 A medium channel 8 is formed between two adjacent guide vanes. The medium channel 8 is set inside the stator assembly, which divides the stator assembly into an outer stator cylinder 9 and an inner stator cylinder 26. The coil 15 is rotatably connected to the inner stator cylinder 26. The impeller 4 is driven to rotate by high-pressure ammonia gas, which in turn drives the rotor 14 and the coil 15 to rotate to generate electricity. This ensures that during operation, the ammonia gas only passes through the inside of the medium channel 8 and does not come into contact with the coil 15, thereby effectively preventing the ammonia gas from corroding the coil 15.

[0041] Please refer to Figure 2-3A front magnetic levitation bearing 7 and a rear magnetic levitation bearing 20 are respectively installed on the outer side of the rotor 14 and at both ends of the coil 15. The rotor 14 is rotatably connected to the stator inner cylinder 26 through the front magnetic levitation bearing 7 and the rear magnetic levitation bearing 20. A front positioning shoulder sleeve 13 is installed on the outer side of the front magnetic levitation bearing 7 and fits onto the end of the stator inner cylinder 26. A pad 16 is installed on the outer side of the rear magnetic levitation bearing 20. The end of the pad 16 away from the coil 15 abuts against the rear positioning shoulder sleeve 17. A cover plate 18 is sealed on the outer side of the rear positioning shoulder sleeve 17 away from the pad 16 and located on the outer side of the rotor 14. A front sealing cover 11 is sealed at the end of the shoulder sleeve 13 away from the stator inner cylinder 26, and a rear sealing cover 19 is sealed at the end of the stator inner cylinder 26 away from the front sealing cover 11. The rear sealing cover 19, cover plate 18, rear positioning shoulder sleeve 17, front sealing cover 11 and the inner side of the stator inner cylinder 26 form a sealed cavity. The interior of the stator inner cylinder 26 is sealed by the front sealing cover 11, front positioning shoulder sleeve 13, stator inner cylinder 26, rear positioning shoulder sleeve 17, cover plate 18 and rear sealing cover 19, which effectively prevents ammonia gas from entering the stator inner cylinder 26 and causing corrosion to the coil 15, thereby improving the service life.

[0042] Please refer to Figure 3 and Figure 7 The guide vanes are a number of first guide vanes 28 or third guide vanes 30 arranged in a ring array. The first guide vanes 28 are straight blades, and the third guide vanes 30 are spiral blades. When the guide vanes are the third guide vanes 30 arranged in a ring array, the flow time of ammonia gas in the medium channel 8 can be increased compared with the first guide vanes 28, thereby improving the cooling effect.

[0043] When the guide vanes are the third guide vanes 30 arranged in a ring array, they will be subjected to the force of ammonia gas because the third guide vanes 30 are spiral in shape. When the guide vanes are several second guide vanes 29 arranged in a symmetrical array on both sides, the ammonia gas passes through the inner side of the symmetrical second guide vanes 29 respectively, and the forces on both sides can cancel each other out, thereby effectively avoiding the influence caused by the force of ammonia gas.

[0044] Please refer to Figure 2-3An impeller 4 is fixed to one end of the rotor 14 near the generator housing 2. The impeller 4 is rotatably connected to the mounting end cover 10. Several nozzle blades 5 are arranged in a ring array on the outer periphery of the impeller 4. Several connecting plates 22 are fixed to the outer periphery of the guide shroud 3. The connecting plates 22 are fixedly connected to the generator housing 2. An air intake channel 21 is formed between the guide shroud 3 and the generator housing 2. An air intake ring 6 is fixed inside the generator housing 2 and outside the impeller 4. The air intake ring 6 forms an outward-opening air intake opening at one end facing the turbine housing 1. A guide ring 12 is fitted on the outer side of the front positioning shoulder sleeve 13. The outer periphery of the guide ring 12 is an arc-shaped surface that gradually diffuses outward from the end near the air intake ring 6. The air intake channel is formed by the arrangement of the guide shroud 3 and the connecting plates 22. 21. After ammonia enters through the air inlet 27, it is guided by the flow guide shroud 3 and enters the inner side of several nozzle blades 5 through the air intake channel 21. After flowing through the impeller 4, it expands and performs work, driving the impeller 4 to rotate, which in turn drives the rotor 14 and coil 15 to rotate to generate electricity. When the ammonia passes through the impeller 4, the outwardly expanding diffuser 23 on the air intake ring 6 will guide it to diffuse towards the outer periphery of the diffuser 23. Then, the diffused ammonia flow passes through the flow guide ring 12 and is guided by the arc surface of its outer wall to enter the inner side of the medium channel 8. The arrangement of the air intake ring 6 and the flow guide ring 12 improves the flow efficiency of ammonia, reduces the contact between ammonia and the front sealing cover 11, and reduces the probability of ammonia entering the stator inner cylinder 26 and corroding the coil 15.

[0045] A centripetal turboexpander generally includes a generator housing 2, an impeller 4, a guide shroud 3, a mounting end cover 10, a control ring 34, and nozzle blades 5. The impeller 4 is rotatably connected to the rotor 14 and the mounting end cover 10. The control ring 34 is fixed to the mounting end cover 10 by screws 37 or similar means. The mounting end cover 10 is coaxial with the impeller 4 and has multiple nozzle blades 5. During operation, the multiple nozzle blades 5 guide high-pressure ammonia gas to the impeller 4. The high-pressure gas undergoes adiabatic expansion to consume its internal energy and perform work, thereby generating a high-speed rotating airflow at the impeller 4 and driving the impeller 4 to rotate. The impeller 4 is then connected to the generator structure to generate electricity. All of the above are existing technologies and will not be elaborated further.

[0046] Please refer to Figure 2-3The medium channel 8, starting from the end near the guide ring 12, includes an air inlet section 31, a cooling section 32, and an air outlet section 33 in sequence. The cooling section 32 is located on the outer periphery of the coil 15, and the cross-sectional area of ​​the cooling section 32 is larger than that of the air inlet section 31 or the air outlet section 33. After ammonia enters the medium channel 8, it first enters through the air inlet section 31 and then enters the cooling section 32. Due to the larger cross-section of the cooling section 32, the flow rate of ammonia will decrease after entering the cooling section 32, thereby increasing the residence time inside the cooling section 32, which can effectively improve the cooling effect. On the other hand, the larger cross-section of the cooling section 32 is obtained by reducing the outer diameter of the stator inner cylinder 26 at the cooling section 32, making the outer wall of the stator inner cylinder 26 outside the coil 15 thinner, which is more conducive to cooling and makes the cooling effect better.

[0047] Please refer to Figure 8-11 Multiple sliders 36 are rotatably connected to the control ring 34. The nozzle blade 5 has a groove adapted to the sliders 36. The mounting end cover 10 is also provided with a drive mechanism for controlling the rotation of the control ring 34. The drive mechanism drives the control ring 34 to rotate, thereby driving the nozzle blade 5 to rotate when the control ring 34 rotates. The power source for the rotation of the drive mechanism can be a rotation structure in the prior art, such as a motor (not shown, not described in detail), and drives the control ring 34 to rotate through transmission components such as gears, thereby controlling the gas flow rate.

[0048] Please refer to Figure 8-11The locking structure includes a receiving groove formed on the mounting end cover 10. The end of the screw 37 is located inside the receiving groove. An outer drive ring 38 is rotatably connected to the inside of the receiving groove and outside of several screws 37. An inner drive ring 39 is rotatably connected to the inside of the receiving groove and inside of several screws 37. Both the outer drive ring 38 and the inner drive ring 39 are frictionally connected or meshed with the end of the screw 37. A locking assembly is installed inside the receiving groove and between two adjacent screws 37. The locking assembly includes a connecting bracket 40 rotatably connected to the inside of the receiving groove. Above and below the connecting frame 40 are respectively an outer abutting wheel 41 adapted to the outer transmission ring 38 and an inner abutting wheel 43 adapted to the inner transmission ring 39. The outer abutting wheel 41 and the inner abutting wheel 43 are located on the same side of the connecting frame 40. A driven wheel 42 is fixed on the side of the connecting frame 40 near the control ring 34. A drive groove is opened on the inner side of the control ring 34, and a drive wheel 44 is installed inside the drive groove. The driven wheel 42 is located inside the drive groove and meshes with the drive wheel 44. When the control ring 34 rotates clockwise, the driven wheel 42 can be driven to rotate clockwise through the drive wheel 44, thereby... The connecting frame 40 rotates clockwise. When the connecting frame 40 rotates clockwise, the inner abutting wheel 43 separates from the inner transmission ring 39, and the outer abutting wheel 41 gradually abuts against the outer transmission ring 38. This causes the outer abutting wheel 41 to provide a clockwise circumferential force to the outer transmission ring 38, thereby causing the outer transmission ring 38 to provide a clockwise circumferential force to the ends of several screws 37, thus tightening or compensating the screws 37. When the control ring 34 rotates counterclockwise, it can drive the driven wheel 42 to rotate counterclockwise through the drive wheel 44. At this time, the outer abutting wheel 41 and the outer transmission ring 38... The inner abutting wheel 43 abuts against the inner transmission ring 39 from the same side as the outer abutting wheel 41, thereby providing a clockwise circumferential force to the inner transmission ring 39 to tighten or compensate for the screw 37. This ensures that the screw 37 can be tightened or compensated when the control ring 34 rotates clockwise or counterclockwise. Since the control ring 34 is frequently adjusted to regulate the ammonia flow rate during use, the screw 37 will be frequently tightened or compensated, thus effectively preventing multiple screws 37 from becoming loose.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A pure ammonia gas magnetic levitation turbine generator unit, comprising a turbine housing (1) and a generator housing (2) arranged front and rear and connected by flanges, wherein an air inlet (27) is provided at the end of the generator housing (2), and a generator assembly is provided inside the turbine housing (1), the generator assembly comprising a rotor (14), a coil (15) and a stator assembly, wherein the coil (15) is fixed outside the rotor (14) and rotatably connected inside the stator assembly, wherein a turbine assembly for driving the rotor (14) to rotate is provided inside the generator housing (2), the turbine assembly comprising a flow guide (3), a mounting end cover (10) and several screws (37), wherein the flow guide (3) is fixed inside the generator housing (2), a control ring (34) is rotatably connected to the mounting end cover (10), and several nozzle blades (5) are rotatably connected to the mounting end cover (10), and several screws (37) are arranged in a ring array and the control ring (34) is fixed to the flow guide (3), characterized in that: The turbine assembly is provided with a locking structure for locking a plurality of screws (37). The stator assembly includes a plurality of guide vanes and an inner stator cylinder (26) and an outer stator cylinder (9) disposed inside and outside the stator. The inner stator cylinder (26) and the outer stator cylinder (9) are connected by a plurality of the guide vanes. The outer stator cylinder (9) is fixed inside the turbine housing (1). A front magnetic bearing (7) and a rear magnetic bearing (20) are respectively installed on the outside of the rotor (14) and at both ends of the coil (15). The rotor (14) is rotatably connected to the stator inner cylinder (26) through the front magnetic bearing (7) and the rear magnetic bearing (20). A front positioning shoulder sleeve (13) is installed on the outside of the front magnetic bearing (7) and is fitted onto the end of the stator inner cylinder (26). A pad sleeve (16) is installed on the outside of the rear magnetic bearing (20) and the end of the pad sleeve (16) away from the coil (15) abuts against the rear positioning shoulder sleeve (17). A cover plate (18) is sealed and installed on the rear positioning shoulder sleeve (17) at the end away from the pad sleeve (16) and on the outside of the rotor (14). A front sealing cover (11) is sealed and installed on the outside of the rotor (14) and at the end away from the stator inner cylinder (26) of the front positioning shoulder sleeve (13). A rear sealing cover (19) is sealed and installed on the end away from the front sealing cover (11) of the stator inner cylinder (26). A sealing cavity is formed between the rear sealing cover (19), the cover plate (18), the rear positioning shoulder sleeve (17), the front sealing cover (11) and the inner side of the stator inner cylinder (26).

2. The pure ammonia gas magnetic levitation turbine power generation integrated unit according to claim 1, characterized in that, A medium channel (8) is formed between two adjacent guide vanes.

3. The pure ammonia gas magnetic levitation turbine power generation integrated unit according to claim 1, characterized in that, The guide vanes are a plurality of first guide vanes (28) or third guide vanes (30) arranged in a ring array.

4. The pure ammonia gas magnetic levitation turbine power generation integrated unit according to claim 1, characterized in that, The guide vanes are a number of second guide vanes (29) arranged in a symmetrical array on both sides.

5. The pure ammonia magnetic levitation turbine power generation integrated unit according to claim 2, characterized in that, The rotor (14) is fixed with an impeller (4) near the end of the generator housing (2). The impeller (4) is rotatably connected to the mounting end cover (10). A plurality of nozzle blades (5) are arranged in a ring array on the outer periphery of the impeller (4). A plurality of connecting plates (22) are fixed on the outer periphery of the flow guide (3). The connecting plates (22) are fixedly connected to the generator housing (2). An air intake channel (21) is formed between the flow guide (3) and the generator housing (2). An air intake ring (6) is fixed on the inner side of the generator housing (2) and on the outer side of the impeller (4). The air intake ring (6) forms an outwardly opening diffuser (23) at the end facing the turbine housing (1). A flow guide ring (12) is sleeved on the outer side of the front positioning shoulder sleeve (13). The outer periphery of the flow guide ring (12) is an arc-shaped surface that gradually diffuses outward from the end near the air intake ring (6).

6. The pure ammonia magnetic levitation turbine power generation integrated unit according to claim 5, characterized in that, The medium channel (8) includes an air inlet section (31), a cooling section (32) and an air outlet section (33) in sequence from one end near the guide ring (12). The cooling section (32) is located on the outer periphery of the coil (15), and the cross-sectional area of ​​the cooling section (32) is greater than the cross-sectional area of ​​the air inlet section (31) or the air outlet section (33).

7. The pure ammonia gas magnetic levitation turbine power generation integrated unit according to claim 1, characterized in that, Multiple sliders (36) are rotatably connected to the control ring (34). The nozzle blade (5) has a groove adapted to the slider (36). The mounting end cover (10) is also provided with a drive mechanism for controlling the rotation of the control ring (34).

8. The pure ammonia magnetic levitation turbine power generation unit according to claim 7, characterized in that, The locking structure includes a receiving groove formed on the mounting end cover (10), the end of the screw (37) is located inside the receiving groove, an outer drive ring (38) is rotatably connected inside the receiving groove and outside a plurality of screws (37), an inner drive ring (39) is rotatably connected inside the receiving groove and inside a plurality of screws (37), the outer drive ring (38) and the inner drive ring (39) are both frictionally connected or meshed with the end of the screw (37), and a locking assembly is installed inside the receiving groove and between two adjacent screws (37).

9. A pure ammonia gas magnetic levitation turbine power generation unit according to claim 8, characterized in that, The locking assembly includes a connecting frame (40) rotatably connected to the inner side of the receiving groove. An outer abutting wheel (41) adapted to the outer transmission ring (38) and an inner abutting wheel (43) adapted to the inner transmission ring (39) are fixed above and below the connecting frame (40), respectively. The outer abutting wheel (41) and the inner abutting wheel (43) are located on the same side of the connecting frame (40). A driven wheel (42) is fixed on the side of the connecting frame (40) near the control ring (34). A drive groove is opened on the inner side of the control ring (34). A drive wheel (44) is installed on the inner side of the drive groove. The driven wheel (42) is located on the inner side of the drive groove and meshes with the drive wheel (44).

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