Magnetically-driven steam turbine with adjustable stationary blades

Abstract

The invention discloses a magnetically-driven turbine with adjustable stationary blades. The magnetically-driven turbine comprises a turbine shaft system, a shaft system wheel disc, a cylinder, a plurality of turbine stationary blades, an integrated angle adjusting rotating wheel, an angle adjusting translation magnetic plate and an angle adjusting driving mechanism. And the shafting wheel disc is arranged on the steam turbine shafting. And the steam turbine shaft system and the shaft system wheel disc are arranged in the cylinder. The multiple steam turbine stationary blades are arranged in the air cylinder, and the tops of the multiple steam turbine stationary blades extend out of the air cylinder. The integrated angle adjusting rotating wheel is arranged outside the air cylinder, and the interior of the integrated angle adjusting rotating wheel is correspondingly matched with the multiple steam turbine stationary blades. Therefore, according to the magnetic drive adjustable stationary blade steam turbine, pneumatic improvement and efficiency improvement of the steam turbine under the low-load deviation working condition are achieved, contact type mechanical abrasion is avoided, and high-reliability adjustment of the angle is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of energy and power station, and in particular to a magnetically driven adjustable stator blade steam turbine. Background Art

[0002] In traditional steam turbine designs, the angle of the stator blades is usually fixed and cannot be dynamically adjusted according to the actual operating conditions of the steam turbine. This design will cause aerodynamic flow characteristics to not match when the steam turbine is under low load or under off-state operation, increasing flow losses and thus affecting the operating efficiency of the unit. In order to improve this problem, technicians in this field began to study variable stator blade technology, that is, adjusting the angle of the stator blades to adapt to different operating conditions, so as to reduce flow losses and improve operating efficiency.

[0003] However, variable stator blade technology mostly uses contact mechanical transmission, which has mechanical wear problems and can easily cause the adjustment mechanism to fail after long-term operation, affecting the accuracy and reliability of the stator blade angle. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetically driven adjustable stator blade steam turbine, which actually realizes aerodynamic improvement and efficiency enhancement under low-load bias conditions of the steam turbine, avoids contact mechanical wear, and realizes highly reliable angle adjustment.

[0005] To achieve the above-mentioned purpose, the present invention provides a magnetically driven adjustable stator turbine, comprising: a turbine shaft system, a shaft system wheel, a cylinder, a plurality of turbine stator blades, an integrated angle adjustment wheel, an angle adjustment translational magnetic plate, and an angle adjustment drive mechanism. The shaft system wheel is mounted on the turbine shaft system. The turbine shaft system and the shaft system wheel are mounted in the cylinder. The plurality of turbine stator blades are respectively arranged in the cylinder, and the tops of the plurality of turbine stator blades extend out of the cylinder. The integrated angle adjustment wheel is arranged outside the cylinder, and the interior of the integrated angle adjustment wheel is adapted to correspond to the plurality of turbine stator blades. The angle adjustment translational magnetic plate is arranged outside the integrated angle adjustment wheel, and the angle adjustment translational magnetic plate is used to correspond to the exterior of the integrated angle adjustment wheel. The angle adjustment driving mechanism is in transmission connection with the angle adjustment translational magnetic plate, and the angle adjustment driving mechanism is used to drive the angle adjustment translational magnetic plate to translate horizontally to the left and right, thereby driving the integrated angle adjustment wheel to rotate in a small angle circle, and then driving the multiple turbine stator blades to rotate from the first position to the second position. The angle adjustment translational magnetic plate has a translational magnetic strip near the outer side of the integrated angle adjustment wheel, and the translational magnetic strip is used to adapt to the integrated angle adjustment wheel.

[0006] In one embodiment of the present invention, the magnetically driven adjustable stator turbine further comprises a connecting rod, and both ends of the connecting rod are respectively transmission-connected to the angle adjustment driving mechanism and the angle adjustment translational magnetic plate.

[0007] In one embodiment of the present invention, an outer side of the integrated angle adjustment wheel has an external meshing magnetic wheel, and the external meshing magnetic wheel is used to correspond and adapt to the translational magnetic strip.

[0008] In one embodiment of the present invention, an inner side of the integrated angle adjustment wheel has an internal meshing magnetic wheel, and the internal meshing magnetic wheel is used to correspond to and adapt to the plurality of steam turbine stator blades.

[0009] In one embodiment of the present invention, the tops of the plurality of steam turbine stator blades are each provided with a stator blade rotating magnetic wheel, and the stator blade rotating magnetic wheel is used to correspond and adapt to the internal meshing magnetic wheel.

[0010] In one embodiment of the present invention, the angle adjustment drive mechanism is driven by hydraulic pressure or stepping motor.

[0011] In one embodiment of the present invention, the turbine shaft system and the shaft system wheel are integrally formed.

[0012] In one embodiment of the present invention, the magnetically driven adjustable stator blade steam turbine further comprises a plurality of steam turbine moving blades respectively disposed in the cylinder, and the plurality of steam turbine moving blades and the plurality of steam turbine stator blades are alternately arranged.

[0013] Compared with the prior art, the magnetically driven adjustable stator blade steam turbine according to the present invention has the following beneficial effects:

[0014] 1. The present invention uses variable stator blade technology to adaptively adjust the turbine stator blade angle according to different operating conditions, so that it can better match the aerodynamic flow characteristics under the corresponding working conditions, thereby reducing the flow loss and significantly improving the operating efficiency of the unit under low-load bias conditions;

[0015] 2. The integrated angle adjustment wheel design proposed in the present invention can achieve synchronous angle variation of all stationary blades through one driving source. This design simplifies the adjustment mechanism, improves the synchronization and accuracy of the adjustment, and helps to further improve the overall performance of the steam turbine;

[0016] 3. The non-contact magnetic drive technology is used to avoid contact mechanical wear, thereby achieving high-reliability adjustment of the stator blade angle. This design reduces maintenance requirements and failure rates, and improves the operating stability and reliability of the turbine.

[0017] 4. By improving the operating efficiency and reliability of the steam turbine, the present invention helps to reduce the operating cost of the power station and improve the operating economy of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic cross-sectional structure diagram of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention;

[0019] Figure 2 is a partial structural schematic diagram of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention;

[0020] Figure 3 The figure is a schematic diagram of the structure of the stator blade angle adjustment principle of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention.

[0021] Description of main reference numerals:

[0022] 1-steam turbine shaft system, 2-shaft system wheel, 3-cylinder, 4-integrated angle adjustment wheel, 41-external meshing magnetic wheel, 42-internal meshing magnetic wheel, 5-steam turbine stator blade, 51-second position, 52-top, 53-stator blade rotating magnetic wheel, 6-angle adjustment translational magnetic plate, 61-translational magnetic strip, 7-angle adjustment driving mechanism, 71-connecting rod. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0024] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0025] To facilitate understanding, the main implementation concepts of the embodiments of the present invention are first briefly described.

[0026] In traditional steam turbine design, the angle of the stator blades (i.e., fixed blades) is fixed, and this design is based on the optimal efficiency of the steam turbine under rated power and full load conditions. Under this condition, the angle of the stator blades, the design of the moving blades (i.e., rotating blades), and the overall aerodynamic layout are all designed to achieve the highest efficiency. However, steam turbines often face various load changes in actual operation, including low-load operation and off-load operation. When the steam turbine is in low-load operation, the flow velocity, pressure, and temperature distribution of the steam between the stator blades and the moving blades will change due to the reduction in steam flow. The fixed stator blade angle cannot adapt to this change, resulting in a mismatch in aerodynamic flow characteristics and increased flow losses of steam between the blades. This flow loss not only reduces the efficiency of the steam turbine, but may also cause additional stress on the blades, affecting the life of the unit.

[0027] Off-condition operation refers to the operation of the steam turbine under non-design conditions, such as due to grid dispatch requirements, changes in fuel supply, or equipment failure. Under such conditions, steam parameters (such as pressure, temperature) and flow rate may deviate from the design values, resulting in a decrease in the aerodynamic performance of the stator and moving blades. The fixed stator blade angle cannot be adjusted according to these changes, which further reduces the efficiency of the steam turbine and may even cause problems such as unit vibration and noise.

[0028] In order to solve the efficiency problem of traditional steam turbines when operating at low load and under off-load conditions, technicians in this field began to study variable stator blade technology. The core idea of ​​this technology is to adjust the angle of the stator blades to adapt to different operating conditions in order to reduce flow losses and improve operating efficiency. By changing the angle of the stator blades, the flow path of steam between the blades can be adjusted, making the flow of steam smoother and reducing flow losses. At the same time, adjusting the angle of the stator blades can also change the impact force of steam on the moving blades, so that the moving blades can better convert the kinetic energy of steam into mechanical energy and increase the output power of the steam turbine.

[0029] Existing variable stator blade technologies mostly use contact-type mechanical transmission methods, such as using mechanical structures such as gears to drive the stator blades to rotate. However, this method has the problem of mechanical wear, which can easily cause the adjustment mechanism to fail after long-term operation, affecting the accuracy and reliability of the stator blade angle. In the contact-type mechanical transmission method, the contact surfaces between the various components will wear due to friction after long-term operation. This wear will not only cause the accuracy of the adjustment mechanism to decrease, but may also cause mechanical failures, such as gear slippage, connecting rod 71 breakage, etc.

[0030] Due to mechanical wear, the variable stator system has high maintenance requirements and requires regular inspection, lubrication and replacement of worn parts. This not only increases operating costs, but may also cause unit shutdown due to untimely maintenance, affecting the normal operation of the power station. The reliability of the contact mechanical transmission method is relatively low because mechanical failures are random and difficult to predict and prevent. Once a failure occurs, it may cause the turbine to fail to operate normally, or even cause more serious safety accidents.

[0031] In summary, the fixed stator blade design of traditional steam turbines has efficiency problems when operating at low loads and under abnormal conditions. Although variable stator blade technology can solve this problem, the use of contact mechanical transmission brings new challenges such as mechanical wear, high maintenance requirements and reliability issues.

[0032] The inventors discovered the defects of the prior art as mentioned above, and the present invention provides a magnetically driven adjustable stator blade steam turbine, which realizes variable adjustment of the angle of the turbine stator blade 5 by adopting non-contact magnetic drive technology. Specifically, the present invention drives the angle adjustment translation magnetic plate 6 to translate horizontally to the left and right through the angle adjustment drive mechanism 7, thereby driving the integrated angle adjustment wheel 4 to make a small angle circular rotation, and finally driving multiple turbine stator blades 5 to rotate from the first position to the second position 51. This design not only avoids contact mechanical wear and realizes high-reliability adjustment of the stator blade angle, but also can adaptively adjust the angle of the turbine stator blade 5 according to different operating conditions, so that it can better match the aerodynamic flow characteristics under the corresponding conditions, thereby reducing the flow loss and significantly improving the operating efficiency of the unit under low-load bias conditions.

[0033] Figure 1 is a schematic cross-sectional structure diagram of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention; Figure 2 is a partial structural schematic diagram of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention; Figure 3 The figure is a schematic diagram of the structure of the stator blade angle adjustment principle of a magnetically driven adjustable stator blade steam turbine according to an embodiment of the present invention.

[0034] like Figures 1 to 3As shown, a magnetically driven adjustable stator turbine according to a preferred embodiment of the present invention comprises: a turbine shaft system 1, a shaft system wheel 2, a cylinder 3, a plurality of turbine stator blades 5, an integrated angle adjustment runner 4, an angle adjustment translation magnetic plate 6, and an angle adjustment drive mechanism 7. The shaft system wheel 2 is mounted on the turbine shaft system 1. The turbine shaft system 1 and the shaft system wheel 2 are mounted in the cylinder. The plurality of turbine stator blades 5 are respectively arranged in the cylinder, and the tops 52 of the plurality of turbine stator blades 5 extend out of the cylinder. The integrated angle adjustment runner 4 is arranged outside the cylinder, and the inside of the integrated angle adjustment runner 4 is adapted to the plurality of turbine stator blades 5. The angle adjustment translation magnetic plate 6 is arranged outside the integrated angle adjustment runner 4, and the angle adjustment translation magnetic plate 6 is used to adapt to the outside of the integrated angle adjustment runner 4. The angle adjustment driving mechanism 7 is in transmission connection with the angle adjustment translational magnetic plate 6, and the angle adjustment driving mechanism 7 is used to drive the angle adjustment translational magnetic plate 6 to translate horizontally to the left and right, thereby driving the integrated angle adjustment runner 4 to rotate in a small angle circle, and then driving the plurality of turbine stators 5 to rotate from the first position to the second position 51. The angle adjustment translational magnetic plate 6 has a translational magnetic strip 61 near the outer side of the integrated angle adjustment runner 4, and the translational magnetic strip 61 is used to correspond to and adapt to the integrated angle adjustment runner 4.

[0035] Specifically, the integrated angle adjustment wheel 4 is one of the key components of the present invention. It is arranged outside the cylinder 3, and its internal structure corresponds to and adapts to multiple turbine stator blades 5. This design allows the angles of all stator blades to be adjusted simultaneously through an adjustment mechanism, greatly improving the synchronization and accuracy of the adjustment. An outer side of the integrated angle adjustment wheel 4 is provided with an external meshing magnetic wheel 41, which is used to cooperate with the translational magnetic strip 61 on the angle adjustment translational magnetic plate 6. The angle adjustment translational magnetic plate 6 is another important component. It is arranged outside the integrated angle adjustment wheel 4 and interacts with the external meshing magnetic wheel 41 through the translational magnetic strip 61. The angle adjustment drive mechanism 7 is connected to the angle adjustment translational magnetic plate 6 in a transmission manner to drive it to translate horizontally left and right. This translational motion is transmitted to the integrated angle adjustment wheel 4 through magnetic force, causing it to rotate in a small angle circle, thereby driving multiple turbine stator blades 5 to rotate from the first position to the second position 51. In the process of adjusting the stator blade angle, the top 52 of each steam turbine stator blade 5 is provided with a stator blade rotating magnetic wheel 53, which corresponds to and adapts to the inner meshing magnetic wheel 42 inside the integrated angle adjustment wheel 4. When the integrated angle adjustment wheel 4 rotates, the inner meshing magnetic wheel 42 drives the stator blade rotating magnetic wheel 53 to rotate through the magnetic force, thereby achieving the adjustment of the stator blade angle.

[0036] In one embodiment of the present invention, the magnetically driven adjustable stator turbine further comprises a connecting rod 71, and both ends of the connecting rod 71 are respectively connected in transmission with the angle adjustment driving mechanism 7 and the angle adjustment translational magnetic plate 6.

[0037] Specifically, the two ends of the connecting rod 71 are respectively connected to the angle adjustment drive mechanism 7 and the angle adjustment translation magnetic plate 6 to form a complete transmission chain. When the angle adjustment drive mechanism 7 is started, it transmits the driving force to the angle adjustment translation magnetic plate 6 through the connecting rod 71. This transmission process is based on the rigid connection and mechanical transmission principle of the connecting rod 71, which ensures the effective transmission of the driving force and the accuracy of the angle adjustment. The design of the connecting rod 71 not only takes into account the transmission efficiency, but also takes into account the stability and durability of the structure to ensure that stable transmission performance can be maintained during long-term operation. In this way, the movement of the angle adjustment drive mechanism 7 can be accurately converted into the horizontal translation movement of the angle adjustment translation magnetic plate 6, and then drive the integrated angle adjustment wheel 4 to make a small angle circular rotation, and finally realize the precise adjustment of the angles of multiple turbine stator blades 5. Therefore, the connecting rod 71 plays a vital role in the magnetically driven adjustable stator turbine of the present invention. It ensures the transmission efficiency and accuracy of the entire adjustment mechanism, and provides strong support for realizing the high-reliability adjustment of the angle of the turbine stator blade 5.

[0038] In one embodiment of the present invention, the outer side of the integrated angle adjustment wheel 4 has an external meshing magnetic wheel 41 , and the external meshing magnetic wheel 41 is used to correspond and adapt to the translational magnetic strip 61 .

[0039] Specifically, the outer meshing magnetic wheel 41 is adapted to correspond to the translational magnetic strip 61 provided on the angle adjustment translational magnetic plate 6, and the two interact through magnetic force to achieve non-contact power transmission. When the angle adjustment drive mechanism 7 is started, it drives the angle adjustment translational magnetic plate 6 to perform left and right translational movement in the horizontal direction. The translational magnetic strip 61 on the translational magnetic plate moves with the movement of the plate, and the magnetic field changes generated by it interact with the outer meshing magnetic wheel 41 on the integrated angle adjustment wheel 4. Since magnetic force has the characteristics of attraction and repulsion, this interaction causes the outer meshing magnetic wheel 41 to rotate under the action of magnetic force. The rotation of the outer meshing magnetic wheel 41 then drives the integrated angle adjustment wheel 4 to make a small angle circular rotation. This rotation is precise and controllable because the magnetic drive system can provide stable power output and there is no friction and wear problem caused by mechanical contact. The rotation of the integrated angle adjustment wheel 4 ultimately transmits the rotational power to the turbine stator 5 through the mutual meshing of the internal meshing magnetic wheel 42 and the stator rotating magnetic wheel 53 at the top 52 of the turbine stator 5, thereby adjusting the stator angle. This process not only avoids the mechanical wear problem in the traditional contact mechanical transmission mode, but also improves the accuracy and reliability of the angle adjustment, so that the turbine can maintain the optimal aerodynamic flow characteristics under different operating conditions, thereby significantly improving the operating efficiency and stability of the unit.

[0040] In one embodiment of the present invention, an inner side of the integrated angle adjustment wheel 4 has an inner meshing magnetic wheel 42 , and the inner meshing magnetic wheel 42 is used to correspond and adapt to the plurality of steam turbine stator blades 5 .

[0041] Specifically, the top 52 of each turbine stator blade 5 is equipped with a stator blade rotating magnetic wheel 53, and these stator blade rotating magnetic wheels 53 are meshed with the inner meshing magnetic wheel 42 on the inner side of the integrated angle adjustment wheel 4. When the angle adjustment drive mechanism 7 drives the angle adjustment translation magnetic plate 6 to translate horizontally left and right through the connecting rod 71, the translation magnetic strip 61 will drive the outer meshing magnetic wheel 41 to move, thereby causing the integrated angle adjustment wheel 4 to rotate in a small angle range. Due to the magnetic coupling between the inner meshing magnetic wheel 42 and the stator blade rotating magnetic wheel 53, the rotation of the integrated angle adjustment wheel 4 will be accurately transmitted to each turbine stator blade 5, driving the stator blade to rotate from the first position to the second position 51. This design not only realizes the non-contact adjustment of the stator blade angle and avoids mechanical wear, but also ensures the accuracy and synchronization of the adjustment through magnetic transmission, so that all stator blades can be adjusted to the required angle position simultaneously and accurately. In addition, the meshing design of the internal meshing magnetic wheel 42 and the stator rotating magnetic wheel 53 simplifies the adjustment mechanism, improves the overall performance and reliability of the steam turbine, and provides strong support for the efficient operation of the steam turbine under low load bias conditions.

[0042] In one embodiment of the present invention, the tops 52 of the plurality of steam turbine stator blades 5 each have a stator blade rotating magnetic wheel 53 , and the stator blade rotating magnetic wheel 53 is used to correspond and adapt to the internal meshing magnetic wheel 42 .

[0043] Specifically, a stator blade rotating magnetic wheel 53 is installed on the top 52 of each steam turbine stator blade 5, and this magnetic wheel corresponds to the inner meshing magnetic wheel 42 on the inner side of the integrated angle adjustment wheel 4. When the angle adjustment drive mechanism 7 drives the angle adjustment translational magnetic plate 6 to translate horizontally left and right through the connecting rod 71, the translational magnetic strip 61 will drive the outer meshing magnetic wheel 41 to move, thereby making the integrated angle adjustment wheel 4 rotate in a circle within a small angle range. Due to the magnetic coupling between the inner meshing magnetic wheel 42 and the stator blade rotating magnetic wheel 53, the rotation of the integrated angle adjustment wheel 4 will drive the stator blade rotating magnetic wheel 53 to rotate, thereby rotating the steam turbine stator blade 5 from the original position (first position) to the optimized position (second position 51). This design not only avoids the mechanical wear problem in traditional contact mechanical transmission mode and improves the reliability and accuracy of stator blade angle adjustment, but also realizes rapid and precise adjustment of stator blade angle through magnetic drive, so that the steam turbine can better adapt to different operating conditions, reduce flow loss and improve operating efficiency.

[0044] In one embodiment of the present invention, the angle adjustment drive mechanism 7 is driven by hydraulic pressure or a stepping motor.

[0045] Specifically, in a magnetically driven adjustable stator turbine, hydraulic drive can ensure that the angle adjustment translational magnetic plate 6 moves smoothly in the horizontal direction, and then accurately controls the rotation of the integrated angle adjustment runner 4 through the magnetic force, so as to achieve fine adjustment of the angle of the turbine stator 5. In addition, the oil of the hydraulic system also has a certain damping effect, which helps to reduce the vibration and noise of the system and improve the running stability of the steam turbine. On the other hand, the stepper motor drive is favored for its precise stepping control, simple control logic and high positioning accuracy. The stepper motor controls the rotation angle and speed of the rotor by receiving pulse signals, so it can very accurately control the moving distance and speed of the angle adjustment translational magnetic plate 6, so as to achieve precise adjustment of the angle of the turbine stator 5. This driving mode is particularly suitable for occasions where the stator angle needs to be adjusted frequently, such as when the steam turbine is running under different loads and working conditions. In addition, the stepper motor drive also has the advantages of fast response speed and flexible control, which helps to improve the adaptability and operating efficiency of the steam turbine.

[0046] Based on the above analysis, it can be seen that the angle adjustment drive mechanism 7 in the present invention adopts hydraulic drive or stepper motor drive, which not only takes into account the stability and controllability of the drive, but also takes into account the accuracy and adaptability, and provides a reliable technical guarantee for the stator angle adjustment of the magnetic drive adjustable stator blade steam turbine. This design choice not only improves the operating efficiency and stability of the steam turbine, but also makes an important contribution to energy saving and consumption reduction and operational economic improvement of the power station.

[0047] In one embodiment of the present invention, the turbine shaft system 1 and the shaft system wheel 2 are integrally formed.

[0048] Specifically, the one-piece molding can ensure that the connection between the turbine shaft system 1 and the shaft system wheel 2 is extremely firm, avoiding the loosening or detachment problems that may occur in the traditional connection method, thereby improving the stability and reliability of the entire shaft system. In a high-speed rotating mechanical device such as a steam turbine, the stability of the shaft system is crucial, because any slight shaking or imbalance may cause vibration, noise, and even damage to the equipment. The one-piece molding design reduces potential failure points by eliminating connecting parts, making the shaft system more stable during operation, which helps to improve the operating efficiency and life of the steam turbine. In addition, the one-piece molding also helps to improve the coaxiality of the turbine shaft system 1 and the shaft system wheel 2. In the traditional assembly method, since the shaft system and the wheel are manufactured separately and then connected together, it is difficult to ensure that the axes of the two are completely coincident. The deviation of coaxiality will cause imbalance during the rotation process, and then generate vibration and noise, affecting the performance of the steam turbine. The one-piece molding can ensure that the shaft system and the wheel maintain a high degree of coaxiality during the manufacturing process, thereby reducing the impact of these adverse factors. In addition, the one-piece molding is also conducive to simplifying the manufacturing and assembly process. In the traditional manufacturing process, the shaft system and the impeller need to be manufactured separately, and then precisely processed and assembled to ensure the matching accuracy of the two. This process is not only time-consuming and labor-intensive, but also requires high-precision processing equipment and technology. In one-piece molding, the shaft system and the impeller can be manufactured as a whole, which simplifies the processing and assembly process and reduces manufacturing costs and time. Finally, the one-piece design also helps to improve the overall rigidity and strength of the steam turbine. Since the shaft system and the impeller are a whole, they can jointly withstand various forces and vibrations during operation without the problem of local stress concentration. This holistic design makes the steam turbine more reliable when dealing with emergencies or extreme conditions, and helps protect the equipment from damage.

[0049] In one embodiment of the present invention, the magnetically driven adjustable stator blade steam turbine further comprises a plurality of steam turbine moving blades, which are respectively disposed in the cylinder, and the plurality of steam turbine moving blades and the plurality of steam turbine stator blades 5 are arranged alternately.

[0050] Specifically, when the steam enters the cylinder, it first encounters a row of stationary blades, which are carefully designed into specific shapes and angles to guide the steam to flow along a predetermined path and adjust the speed and pressure distribution of the steam. Guided by the stationary blades, the steam impacts the moving blades at a more suitable angle and speed, and the moving blades rotate using this impact force. Subsequently, the steam continues to flow through the next row of stationary blades, is guided and adjusted again, and then impacts the next row of moving blades. This process is repeated continuously in the cylinder, and the energy of the steam is gradually converted into mechanical energy, driving the turbine shaft system 1 to rotate continuously. The alternating arrangement of multiple turbine moving blades and multiple turbine stationary blades 5 in the present invention not only ensures the energy conversion efficiency of the turbine during normal operation, but also provides the necessary structural support for the variable adjustment of the stationary blade angle. Since the angle of the stationary blade can be dynamically adjusted according to the actual operating conditions of the turbine, the turbine can better adapt to different loads and operating conditions, reduce flow losses, and improve operating efficiency. At the same time, the alternating arrangement of moving blades and stationary blades also ensures that the turbine can maintain a stable flow field and aerodynamic performance when adjusting the stationary blade angle, avoiding flow field turbulence or performance degradation caused by changes in the stationary blade angle.

[0051] In practical applications, the magnetically driven adjustable stator blade steam turbine of the present invention comprises a steam turbine shaft system 1, a shaft system wheel 2, a cylinder 3, an integrated angle adjustment runner 4, a plurality of steam turbine stator blades 5, an angle adjustment translational magnetic plate 6, an angle adjustment drive mechanism 7 and a plurality of steam turbine moving blades. Steam turbines are generally designed for aerodynamics such as stator blades and moving blades according to the optimal efficiency under rated power and full load conditions. When operating under rated power and full load conditions, the stator blade angle is at the original design angle θ1 (first position). For different low-load bias conditions, different stator blade optimization angles θ2 (second position 51) can be obtained according to analysis and design. When the steam turbine is in a certain low-load bias condition, the stator blades are adjusted according to the corresponding designed optimization angle.

[0052] The angle adjustment drive mechanism 7 uses the connecting rod 71 to drive the angle adjustment translation magnetic plate 6 to translate horizontally. The translation magnetic strip 61 drives the outer meshing magnetic wheel 41 to move, thereby driving the integrated angle adjustment wheel 4 to rotate in a small angle range (such as Figure 2 The integrated angle adjustment wheel 4 has an internal meshing magnetic wheel 42, which can mesh with the stator rotating magnetic wheel 53 at the top 52 of the turbine stator blade 5, driving the top 52 of the stator blade to rotate, and then driving the turbine stator blade 5 to rotate from the original position (first position) to the second position 51, thereby achieving the adjustment of the stator blade angle (as shown in FIG. Figure 3 The angle adjustment drive mechanism 7 may be driven by hydraulic pressure or a stepping motor.

[0053] In summary, the magnetically driven adjustable stator blade steam turbine of the present invention has the following beneficial effects:

[0054] 1. The present invention uses variable stator blade technology to adaptively adjust the turbine stator blade angle according to different operating conditions, so that it can better match the aerodynamic flow characteristics under the corresponding working conditions, thereby reducing the flow loss and significantly improving the operating efficiency of the unit under low-load bias conditions;

[0055] 2. The integrated angle adjustment wheel design proposed in the present invention can achieve synchronous angle variation of all stationary blades through one driving source. This design simplifies the adjustment mechanism, improves the synchronization and accuracy of the adjustment, and helps to further improve the overall performance of the steam turbine;

[0056] 3. The non-contact magnetic drive technology is used to avoid contact mechanical wear, thereby achieving high-reliability adjustment of the stator blade angle. This design reduces maintenance requirements and failure rates, and improves the operating stability and reliability of the turbine.

[0057] 4. By improving the operating efficiency and reliability of the steam turbine, the present invention helps to reduce the operating cost of the power station and improve the operating economy of the power station.

[0058] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A magnetically driven adjustable stator turbine, characterized in that: include: Steam turbine shafting; A shafting wheel disc, mounted on the steam turbine shafting; a cylinder, in which the turbine shaft system and the shaft system wheel are installed; A plurality of steam turbine stationary blades are respectively arranged in the cylinder, and the tops of the plurality of steam turbine stationary blades extend out of the cylinder; An integrated angle adjustment wheel is arranged outside the cylinder, and the interior of the integrated angle adjustment wheel is adapted to correspond to the plurality of turbine stator blades; An angle adjustment translational magnetic plate is arranged outside the integrated angle adjustment rotating wheel, and the angle adjustment translational magnetic plate is used to correspond to and adapt to the outside of the integrated angle adjustment rotating wheel; as well as An angle adjustment driving mechanism is transmission-connected to the angle adjustment translational magnetic plate, and the angle adjustment driving mechanism is used to drive the angle adjustment translational magnetic plate to translate horizontally to the left and right, thereby driving the integrated angle adjustment wheel to make a small-angle circular rotation, thereby driving the plurality of steam turbine stator blades to rotate from the first position to the second position; Among them, the angle adjustment translational magnetic plate has a translational magnetic strip on the outer side close to the integrated angle adjustment rotating wheel, and the translational magnetic strip is used to correspond and adapt to the integrated angle adjustment rotating wheel.

2. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: It also includes a connecting rod, both ends of which are respectively connected to the angle adjustment driving mechanism and the angle adjustment translational magnetic plate.

3. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: The outer side of the integrated angle adjustment wheel is provided with an external meshing magnetic wheel, and the external meshing magnetic wheel is used to correspond and adapt to the translational magnetic strip.

4. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: The inner side of the integrated angle adjustment wheel is provided with an internal meshing magnetic wheel, and the internal meshing magnetic wheel is used to correspond and adapt to the plurality of steam turbine stator blades.

5. The magnetically driven adjustable stator blade steam turbine according to claim 4, characterized in that: The tops of the plurality of steam turbine stator blades are each provided with a stator blade rotating magnetic wheel, and the stator blade rotating magnetic wheel is used to correspond and adapt to the internal meshing magnetic wheel.

6. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: The angle adjustment driving mechanism is driven by hydraulic pressure or stepping motor.

7. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: The steam turbine shaft system and the shaft system wheel are integrally formed.

8. The magnetically driven adjustable stator blade steam turbine according to claim 1, characterized in that: It also includes a plurality of steam turbine moving blades, which are respectively arranged in the cylinders, and the plurality of steam turbine moving blades and the plurality of steam turbine stationary blades are arranged alternately.

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