Magnet yoke key with sectional type inclined plane

Abstract

The utility model discloses a magnet yoke key with a sectional type inclined plane, which comprises a fixed key and a side driving key, the fixed key is a cuboid, and a threaded hole is arranged in the middle of the fixed key. The side driving keys are divided into a magnet yoke side driving key and a rotor support side driving key which are arranged on the left side and the right side of the fixed key respectively. The middle section of the fixing key and one side of the side driving key are sectional type inclined planes which are mutually matched and tightly connected, contact area and friction force are increased, torque is effectively transmitted, a self-locking function is achieved, and connection firmness is enhanced. And the magnet yoke side driving keys are cubes, are shorter than the fixed keys and are arranged on the left and right sides above the fixed keys. And the rotor bracket side driving keys are small cuboids, are narrower than the magnet yoke side driving keys, are as long as the fixed keys after being combined with the magnet yoke side driving keys, and are arranged on the left and right sides below the fixed keys to enhance the structural compactness of the rotor. And gaskets and bolts are arranged on the left side and the right side of the center of the pressing plate. A stop block is arranged at the tail of the fixing key to limit movement.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydropower equipment, and in particular relates to a segmented inclined magnetic yoke key. Background Technology

[0002] With the large-scale development and utilization of emerging energy sources in my country, the configuration of pumped storage power stations has gradually evolved from a single focus on power load centers to encompass multiple aspects, including power load centers, energy bases, transmission lines, and receiving terminals. Pumped storage power stations are the most reliable, economical, long-life, large-capacity, and technologically mature energy storage devices in the power system, and are an important component of new energy development. By constructing pumped storage power stations, the operating and maintenance costs of nuclear power units can be reduced, and their lifespan extended; the impact of wind farm grid connection on the power grid can be effectively reduced, improving the coordination between wind farm and power grid operations, as well as the safety and stability of power grid operation. Pumped storage power station units rotate bidirectionally, increasing the stress and fatigue requirements of various components. The rotor yoke key, as a load-bearing component connecting the rotor support and the yoke, is extremely important, but its manufacturing is difficult and can affect the operational safety of the unit.

[0003] The magnetic yoke is a slender rod with one end larger than the other and a bevel. The longer the magnetic yoke, the greater the difference in size between the large and small ends. Therefore, it is difficult to guarantee dimensional and geometric tolerances during processing. It is also prone to deformation during transportation and storage. Often, it needs to be straightened and leveled again after being transported to the construction site, which greatly affects the power station installation schedule.

[0004] Patent CN214959194U discloses a temporary fixing device for a magnetic yoke key, comprising several U-shaped clamps mounted on the magnetic yoke key. Each U-shaped clamp includes a base, a fixed support arm fixedly mounted on one side of the base, and a movable support arm movably mounted on the other side of the base. A nut is fixedly mounted in the center of the base, and a tightening bolt passes through the threaded part of the nut. A washer is provided between the threaded end of the tightening bolt and the magnetic yoke key. This invention is characterized by its ease of use, ensuring the position of the magnetic yoke key remains unchanged during disassembly, and maintaining the integrity of the magnetic yoke key. Utility Model Content

[0005] To address the above issues, a multi-segment inclined magnetic yoke key was invented. This design divides the original inclined profile of the yoke key into multiple segments, reducing the size difference between the large and small ends, thus increasing the overall rigidity of the yoke key. This reduces manufacturing difficulty, facilitates transportation and storage, and improves installation efficiency. Several cylindrical pins are driven into the key on the yoke side. During installation, the rotor-side yoke key is tightened first. After the yoke laminations are completed, nuts are used to tighten the pressure plate to prevent the driven key from shifting.

[0006] A segmented, beveled magnetic yoke key includes a fixed key and side-driven keys. The fixed key is a cuboid with a threaded hole in the middle. The side-driven keys include a yoke side-driven key and a rotor support side-driven key. The yoke side-driven keys are divided into a first yoke side-driven key and a second yoke side-driven key, respectively located on the left and right sides of the fixed key. The rotor support side-driven keys are also divided into a first rotor support side-driven key and a second rotor support side-driven key, located on the left and right sides of the fixed key. This design improves machining accuracy. Through integral plate machining and pin assembly, the overall rigidity and machining quality of the key are ensured, reducing deformation and machining errors. The enhanced overall rigidity and uniform stress distribution improve the fatigue resistance of the magnetic yoke key, extending its service life. It is particularly suitable for high-demand operating conditions such as pumped storage power stations, ensuring stable operation under high loads and high speeds, and reducing maintenance costs.

[0007] Preferably, both sides of the middle section of the fixed key are segmented bevels, and one side of the side-engaged key is also segmented bevels. The bevels of the two types of keys cooperate with each other for a tight connection. By increasing the contact area and friction, torque is effectively transmitted, preventing connection loosening due to centrifugal force during operation, and a self-locking function enhances the connection's firmness. This improves the convenience of installation and maintenance, provides a clear positioning reference, improves installation accuracy and consistency, simplifies the maintenance process, and reduces maintenance difficulty and cost.

[0008] Preferably, the driven keys on the yoke side are cubes, shorter than the fixed key, and positioned on the left and right sides above the fixed key. The cube-shaped driven keys provide a larger contact area, helping to evenly distribute forces, reduce localized stress concentration, thereby lowering the risk of loosening or damage and enhancing connection stability. Their symmetrical arrangement on both sides above the fixed key balances forces, prevents vibration or misalignment, and improves rotor operating stability, making them particularly suitable for the bidirectional rotation conditions of pumped storage power station units.

[0009] Preferably, the rotor support side key is a small cuboid, with a width smaller than the yoke side key, and its length, combined with the length of the yoke side key, is exactly the same as the fixed key. The rotor support side key is located on the left and right sides below the fixed key. This ensures that the length of the entire yoke key is equal to that of the fixed key, improving the integrity and consistency of the connection, enhancing the overall structural compactness of the rotor, and reducing stress concentration and connection loosening problems caused by length mismatch.

[0010] Preferably, a pressure plate is provided above the fixing key, and the pressure plate is connected to the fixing key by bolts and nuts. This enhances stability, improves installation accuracy, facilitates maintenance and disassembly, distributes stress, adapts to different working conditions, and ensures long-term stable operation.

[0011] Preferably, washers and bolts are provided on both the left and right sides of the center of the pressure plate. This provides buffering and stress reduction, uniform clamping to prevent loosening, reduced wear and corrosion prevention, adjustable tightening for suitable working conditions, simplified maintenance and reduced costs, and suitability for various environments.

[0012] Preferably, several cylindrical pins are provided on the other side of the inclined surface of the key driven into the yoke. This enhances connection stability, improves installation accuracy, prevents displacement, improves fatigue resistance, simplifies maintenance, and is suitable for high-load, high-speed operating conditions, ensuring long-term stable operation.

[0013] Preferably, a stop is provided at the tail of the fixing key. This restricts the movement of the fixing key, prevents displacement due to centrifugal force, and ensures connection stability. It also enhances overall rigidity and structural strength, enabling the magnetic yoke key to operate reliably under high loads and high speeds. Furthermore, it simplifies installation, provides positioning, and ensures correct assembly.

[0014] The beneficial effects of this utility model are: segmenting the inclined surface of the magnetic yoke reduces the size difference between the large and small ends, improves the overall rigidity of the magnetic yoke, and makes the magnetic yoke less prone to deformation during processing, storage and transportation; after the magnetic yoke is tightened, it is pulled up with bolts, and the magnetic yoke will not loosen.

[0015] During processing, each key can be machined as a whole plate, and then processed into individual pieces according to the required width. This improves the overall machining rigidity of the key, makes it less prone to deformation during processing, and makes it easier to ensure tolerances. After machining, the driven key on the yoke side and the fixed key are assembled into one piece using pins. During installation, the rotor side yoke key is tightened first. After the yoke laminations are completed, the pressure plate is tightened with nuts to prevent the driven key from moving.

[0016] The magnetic yoke key of this invention solves the problem of insufficient stiffness of the magnetic yoke key with a whole length slope, making the magnetic yoke key less prone to deformation during processing, storage and transportation, reducing the adjustment work after processing, and eliminating the need for adjustment during on-site installation. Attached Figure Description

[0017] Figure 1 This is a front view of this utility model.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a left view of this utility model.

[0020] Figure 4 This is a schematic diagram of a component of this utility model.

[0021] Figure 5 This is a schematic diagram of this utility model.

[0022] In the diagram: 1. Fixing key, 2. Key driven into the first rotor support side, 3. Key driven into the second rotor support side, 4. Key driven into the first magnetic yoke side, 5. Key driven into the second magnetic yoke side, 6. Pressure plate, 7. Washer, 8. Bolt, 9. Bolt and nut, 10. Stop block, 11. Cylindrical pin. Detailed Implementation

[0023] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This invention proposes a multi-segmented inclined magnetic yoke key. The yoke key includes a fixed key 1 and side-driven keys. The fixed key 1 is a cuboid with a threaded hole in the middle for easy connection to components such as the rotor support, enhancing stability. The side-driven keys are divided into yoke side-driven keys and rotor support side-driven keys. The yoke side-driven keys are further subdivided into a first yoke side-driven key 4 and a second yoke side-driven key 5, respectively located on the left and right sides of the fixed key 1. The rotor support side-driven keys are divided into a first rotor support side-driven key 2 and a second rotor support side-driven key 3, located on the left and right sides of the fixed key 1. This design, through segmented inclination, reduces the size difference between the large and small ends, enhances the overall rigidity of the yoke key, reduces processing difficulty, and facilitates transportation and storage, improving installation efficiency.

[0025] Furthermore, both sides of the middle section of the fixed key 1 and one side of the side-engaged key are designed as segmented bevels, with the bevels of the two types of keys interlocking for a tight connection. This design not only increases the contact area and friction, effectively transmitting torque and preventing loosening of the connection due to centrifugal force during operation, but also has a self-locking function, enhancing the robustness of the connection. In addition, this design improves the convenience of installation and maintenance, provides a clear positioning reference, improves installation accuracy and consistency, simplifies the maintenance process, and reduces maintenance difficulty and cost.

[0026] The yoke-side driven keys are designed as cubes, shorter than the fixed key 1, and are positioned on the left and right sides above the fixed key 1. The cube shape of the yoke-side driven keys provides a larger contact area, helping to evenly distribute forces, reduce localized stress concentration, thereby lowering the risk of connection loosening or damage and enhancing connection stability. Their symmetrical arrangement on both sides above the fixed key 1 balances forces, prevents vibration or misalignment, and improves rotor operating stability, making them particularly suitable for the bidirectional rotation conditions of pumped storage power station units.

[0027] The rotor support side key is a small cuboid, narrower than the yoke side key, and its length, combined with that of the yoke side key, is exactly the same as that of the fixed key 1. It is positioned on the left and right sides below the fixed key 1. This design ensures that the entire length of the yoke key is equal to that of the fixed key 1, improving the integrity and consistency of the connection, enhancing the overall structural compactness of the rotor, and reducing stress concentration and connection loosening issues caused by length mismatch.

[0028] A pressure plate 6 is positioned above the fixing key 1, and the pressure plate 6 is connected to the fixing key 1 via bolts and nuts 9. This design enhances the stability of the connection, improves installation accuracy, facilitates maintenance and disassembly, distributes stress, adapts to different working conditions, and ensures long-term stable operation. Washers 7 and bolts 8 are located on the left and right sides of the center of the pressure plate 6, which serve to buffer stress, uniformly tighten to prevent loosening, reduce wear and corrosion, and adjust the tightening to suit different working conditions, simplifying maintenance, reducing costs, and making it suitable for various environments.

[0029] Several cylindrical pins 11 are provided on the other side of the inclined surface of the yoke-side key. This design enhances connection stability, improves installation accuracy, prevents displacement, improves fatigue resistance, simplifies maintenance, and is suitable for high-load, high-speed conditions, ensuring long-term stable operation. A stop block 10 is provided at the tail of the fixed key 1 to restrict the movement of the fixed key 1, prevent displacement caused by centrifugal force, and ensure connection stability. This design enhances overall rigidity and structural strength, enabling the yoke key to operate reliably under high load and high speed, while also simplifying installation, providing positioning, and ensuring correct assembly.

[0030] The diagram illustrates a segmented inclined magnetic yoke key, comprising a fixed key 1 and side-driven keys. The fixed key 1 is a cuboid with a threaded hole in the middle. The side-driven keys include a yoke-side driven key and a rotor support-side driven key. The yoke-side driven keys are divided into a first yoke-side driven key 4 and a second yoke-side driven key 5, respectively located on the left and right sides of the fixed key 1. The rotor support-side driven keys are divided into a first rotor support-side driven key 2 and a second rotor support-side driven key 3, located on the left and right sides of the fixed key 1. This segmented design improves machining accuracy. Through whole-plate machining and pin assembly, the overall rigidity and machining quality of the key are ensured, reducing deformation and machining errors. During installation, the rotor-side magnetic yoke keys are tightened first. After the magnetic yoke laminations are completed, the pressure plate 6 is tightened with nuts to prevent the driven keys from shifting, simplifying the installation steps, improving installation efficiency, and reducing secondary straightening and leveling work. The increased overall stiffness and more uniform stress distribution improve the fatigue resistance of the magnetic yoke key, extending its service life. This makes it particularly suitable for demanding conditions such as pumped storage power stations, ensuring stable operation under high loads and speeds while reducing maintenance costs. This design not only improves the reliability of processing and installation but also enhances the overall structural stability, making it especially suitable for demanding conditions such as pumped storage power stations, ensuring stable operation under high loads and speeds while reducing maintenance costs.

[0031] Both sides of the middle section of the fixed key 1 are segmented bevels, and one side of the side-engaged key is also segmented bevels. The bevels of the two types of keys cooperate with each other for a tight connection. This design significantly improves the connection strength and stability. The segmented bevels increase the contact area and friction between the fixed key 1 and the side-engaged key, making the connection between the keys tighter, more effectively transmitting torque, and preventing the connection from loosening due to centrifugal force during unit operation.

[0032] Furthermore, the segmented bevel design features a self-locking function. When subjected to external force, the interlocking of the bevels automatically locks in place, further enhancing the connection's robustness and ensuring reliable operation of the yoke key under high loads and speeds. Secondly, the segmented bevel design improves stress distribution. It disperses stress concentration at the connection point; compared to traditional smooth connections, stress is no longer concentrated at the edges or in localized areas, thus reducing the risk of fatigue failure. This uniform stress distribution extends the yoke key's service life and improves its fatigue resistance, enabling it to better resist the initiation and propagation of fatigue cracks during long-term operation. Moreover, this design enhances the ease of installation and maintenance.

[0033] The segmented bevel design provides a clear positioning reference for installation, allowing the correct position and angle of the fixed key 1 and the side-engaged key to be ensured through the interplay of the bevels during installation. This improves installation accuracy and consistency, and reduces connection problems caused by installation errors. Furthermore, when maintenance or replacement of the side-engaged key is required, the segmented bevel design facilitates disassembly and installation. Simply aligning the side-engaged key with the bevel of the fixed key 1 allows for easy disassembly and installation, simplifying the maintenance process and reducing its difficulty and cost. In addition, the segmented bevel design enhances adaptability. It is adaptable to different installation environments and conditions. For example, even with installation errors or space limitations, the segmented bevels can be adjusted and adapted through interplay, ensuring a tight and stable connection and improving the applicability and flexibility of the magnetic yoke key.

[0034] Under different working conditions, the fit of the segmented inclined plane can be adjusted to adapt to different load and stress requirements, ensuring the stable operation of the magnetic yoke under various working conditions.

[0035] Pumped storage power station units rotate in both directions, placing high demands on the stress and fatigue resistance of their components. The segmented inclined surface design better adapts to this operating condition, ensuring stable operation under high load and high speed, extending service life, and reducing maintenance costs. Simultaneously, this design improves the reliability of machining and installation. The segmented inclined surface design enhances machining accuracy and connection stability, reducing connection problems caused by machining and installation errors, and ensuring the high quality and reliability of the magnetic yoke key. Finally, the segmented inclined surface design enhances the overall structural stability, not only improving connection strength but also enhancing overall structural stability, ensuring the structural strength and stability of the entire rotor, making it particularly suitable for demanding operating conditions such as pumped storage power stations. Through these design and process improvements, the segmented inclined surface magnetic yoke key not only improves the reliability of machining and installation but also enhances the overall structural stability and fatigue resistance, making it particularly suitable for demanding operating conditions such as pumped storage power stations, ensuring stable operation under high load and high speed, and reducing maintenance costs.

[0036] The yoke-side driven keys are designed as cubes, shorter than the fixed key 1, and positioned on the left and right sides above the fixed key 1. The cube shape of the yoke-side driven keys provides a larger contact area, which helps improve connection stability. During unit operation, the yoke is subjected to various forces; the larger contact area allows for more even distribution of these forces, reducing localized stress concentration and thus lowering the risk of connection loosening or damage due to excessive stress.

[0037] Secondly, the magnetic yoke side keys are positioned on the left and right sides above the fixed key 1. This arrangement helps to balance the forces on the rotor. Under the bidirectional rotation of the pumped storage power station unit, this symmetrical distribution ensures that the magnetic yoke keys remain stable under forces in different directions, avoiding vibration or displacement caused by uneven forces, and improving the overall operating stability of the rotor.

[0038] Furthermore, the design of having a key length on the yoke side that is less than that of the fixed key 1 makes the entire yoke key structure more compact. This compact structure not only saves space but also helps improve the overall structural compactness of the rotor, which is especially important for pumped storage power station units, which have high requirements for space and structural precision. The compact structure also reduces vibration and noise caused by loose structure, improving the unit's operating efficiency and reliability.

[0039] Furthermore, this design facilitates installation and maintenance. The cube-shaped yoke side key has a clear positioning and installation direction, making it easier for installers to align the yoke side key with the corresponding position of the fixed key 1, thus improving installation efficiency. During maintenance, if the yoke side key needs to be replaced, this design also makes the disassembly and installation process simpler and faster, reducing maintenance workload and costs.

[0040] The rotor support-side driven key is designed as a small cuboid, with a width smaller than the yoke-side driven key. Its length, combined with the length of the yoke-side driven key, is exactly the same as that of the fixed key 1, and it is positioned on the left and right sides below the fixed key 1. This small cuboid shape of the rotor support-side driven key adapts to the structural characteristics of the rotor support and, in conjunction with the yoke-side driven key, ensures that the total length of the yoke key is equal to that of the fixed key 1, guaranteeing the integrity and consistency of the connection. This design helps improve the overall structural compactness of the rotor, ensures coordinated operation between components, and reduces stress concentration and loosening problems caused by length mismatches.

[0041] Secondly, the width of the key driven into the rotor support side is smaller than that of the key driven into the yoke side. This dimensional difference allows for more flexible adjustment of the key's position during installation, ensuring a tight fit with the rotor support. Simultaneously, this design also helps achieve a better structural layout within a limited space, improving space utilization. This is particularly beneficial in space-constrained equipment such as pumped storage power station units, effectively saving installation space and increasing equipment integration.

[0042] Furthermore, the rotor support side-driven keys are positioned on the left and right sides below the fixed key 1. This symmetrical layout helps to balance the forces on the rotor. During unit operation, the rotor is subjected to various forces. The symmetrically distributed rotor support side-driven keys ensure that these forces are evenly distributed on the rotor support, avoiding vibration or misalignment caused by uneven force distribution and improving the overall rotor's operational stability. This design is particularly suitable for the bidirectional rotation of pumped storage power station units, ensuring stable operation under high load and high speed.

[0043] Furthermore, this design facilitates installation and maintenance. The small, rectangular rotor support side-mounted key has a clear positioning and installation direction, making it easier for installers to align the rotor support side-mounted key with the corresponding position of fixing key 1, thus improving installation efficiency. During maintenance, if the rotor support side-mounted key needs to be replaced, this design also makes the disassembly and installation process simpler and faster, reducing maintenance workload and costs.

[0044] In summary, the rotor support side key is a small cuboid, with a width smaller than the yoke side key. Its length, combined with that of the yoke side key, is exactly the same as that of the fixed key 1. This design, with the key positioned on the left and right sides below the fixed key 1, not only improves the overall integrity and consistency of the connection but also enhances the rotor's operational stability, saves installation space, and simplifies installation and maintenance processes. It is particularly suitable for pumped storage power station units operating under high load, high speed, and bidirectional rotation conditions, ensuring the long-term stable operation of the unit.

[0045] A pressure plate 6 is positioned above the fixed key 1, and the pressure plate 6 is connected to the fixed key 1 via bolts and nuts 9. Firstly, this connection method significantly enhances the stability of the connection. The tight engagement of the pressure plate 6 with the fixed key 1 via bolts and nuts 9 firmly fixes the magnetic yoke key to the rotor support, effectively preventing loosening of the connection due to vibration or centrifugal force during unit operation, ensuring reliable operation of the magnetic yoke key under high load and high speed. Secondly, the design of the pressure plate 6 improves installation accuracy. During installation, the tightening action of the bolts and nuts 9 provides a clear positioning reference for the fixed key 1 and the magnetic yoke key, ensuring their correct position and angle, thereby improving installation accuracy and consistency.

[0046] Furthermore, this bolt and nut connection method is simple in structure and easy to assemble and disassemble, greatly facilitating maintenance and disassembly. When maintenance or replacement of the magnetic yoke is required, maintenance personnel can easily loosen the bolt and nut 9 and quickly remove the pressure plate 6, improving maintenance efficiency and convenience and reducing maintenance costs.

[0047] Meanwhile, the presence of pressure plate 6 helps to disperse stress. It distributes the force of the fixing screws over a wider area, increasing the contact area between the inner ring and the rotating shaft cross-section, improving the fixing force, reducing local stress concentration, and lowering the risk of loosening or damage to the connection due to excessive stress. Moreover, this design enhances the stability of the entire structure, prevents axial movement of the inner ring, and ensures the stability and reliability of the magnetic yoke key during operation. Finally, the tightening force of pressure plate 6 can be flexibly adjusted by rotating the threaded component, ensuring the tightness and reliability of the connection and enabling it to adapt to different working conditions.

[0048] In summary, the design of setting a pressure plate 6 above the fixed key 1 and connecting it with bolts and nuts 9 not only improves the stability and installation accuracy of the connection, but also facilitates maintenance and disassembly. It is particularly suitable for the high-load, high-speed, bidirectional rotation conditions of pumped storage power station units, effectively ensuring the long-term stable operation of the unit.

[0049] Washers 7 and bolts 8 are installed on both sides of the center of the pressure plate 6. Firstly, the washers 7 act as a buffer, reducing direct contact between the bolts 8 and the pressure plate 6, avoiding localized stress concentration, and thus improving connection stability. Simultaneously, the bolts 8, by applying pressure, can more evenly press the pressure plate 6 onto the fixing key 1, ensuring a tight connection between the magnetic yoke key and the rotor support, preventing loosening due to vibration or centrifugal force during unit operation. Secondly, the washers 7 reduce friction between the bolts 8 and the pressure plate 6, preventing wear, extending the service life of the bolts 8 and the pressure plate 6, and providing corrosion protection in humid or corrosive environments.

[0050] Furthermore, by adjusting the tightness of bolt 8, the clamping force of pressure plate 6 can be flexibly controlled to adapt to different installation requirements and working conditions, simplifying the maintenance process and reducing maintenance costs. This design also improves the applicability and flexibility of pressure plate 6, enabling it to adapt to different installation environments and conditions.

[0051] In summary, the washers 7 and bolts 8 on the left and right sides of the center of the pressure plate 6 not only improve the stability and installation accuracy of the connection, but also facilitate maintenance and disassembly. This is suitable for the high-load, high-speed, bidirectional rotation conditions of pumped storage power station units, ensuring the long-term stable operation of the units.

[0052] Several cylindrical pins 11 are installed on the opposite side of the inclined surface of the key driven into the yoke, significantly enhancing the stability of the connection. By providing additional positioning and fixing functions, they effectively prevent the connection from loosening due to vibration or centrifugal force during unit operation. The cylindrical pins 11 also improve installation accuracy, providing a clear positioning reference for the installation process, reducing installation errors, and ensuring the reliability of the yoke key during operation. Furthermore, the cylindrical pins 11 prevent minor displacement of the key driven into the yoke during long-term operation, reducing the risk of failure, while also improving fatigue resistance, extending the service life of the yoke key, and reducing maintenance costs. This design also simplifies the maintenance process, making disassembly and installation more convenient, improving maintenance efficiency, and reducing maintenance difficulty. It is suitable for the high-load, high-speed, bidirectional rotation conditions of pumped storage power station units, ensuring the long-term stable operation of the unit.

[0053] A stop 10 is provided at the tail of the fixed key 1, which effectively restricts the movement of the fixed key 1 during unit operation. Under high speed and high load conditions, centrifugal force and other forces may cause the fixed key 1 to shift, thereby affecting the connection stability between the magnetic yoke key and the rotor support. The stop 10 acts like a sturdy barrier, preventing the fixed key 1 from moving and ensuring the long-term stability and reliability of the connection.

[0054] Secondly, the addition of the stop block 10 enhances the overall rigidity and structural strength of the fixing key 1. In applications like pumped storage power station units, where the strength and stability of components are extremely critical, the increased rigidity means the yoke key can better withstand various loads, including dynamic loads during startup, shutdown, and operation. This not only extends the service life of the yoke key itself but also reduces the number of downtime maintenance due to component damage, thereby improving the unit's availability and economy.

[0055] Furthermore, the stop block 10 plays a crucial positioning role during installation. It provides installers with a clear reference point, ensuring that the fixing key 1 is accurately installed. Correct installation is fundamental to the proper functioning of the magnetic yoke key. The presence of the stop block 10 simplifies the installation process, improves installation efficiency, and reduces subsequent problems caused by improper installation. This is significant for shortening the installation period and reducing installation costs.

[0056] Furthermore, the design of the stop 10 facilitates maintenance and disassembly. When maintenance or replacement of the magnetic yoke key is required, the stop 10 makes the removal of the fixing key 1 easier and quicker. Maintenance personnel can easily remove the stop 10 to inspect or replace the fixing key 1 without worrying about causing unnecessary damage to other components during disassembly. This design not only improves the convenience of maintenance but also reduces maintenance costs, ensuring that the unit can quickly resume operation.

[0057] In summary, the stop block 10 at the tail of the fixed key 1 significantly improves the performance and reliability of the magnetic yoke key by limiting movement, enhancing rigidity, simplifying installation, and facilitating maintenance. It is particularly suitable for the high-load, high-speed, bidirectional rotation conditions of pumped storage power station units, ensuring the long-term stable operation of the unit and providing a strong guarantee for the safe and efficient operation of the power station.

[0058] The scope of protection of this utility model is not limited to the specific embodiments described herein, but is determined by the appended claims and equivalents recognized under patent law. This means that all technical solutions that are the same as or equivalent to this utility model in principle and spirit are within the scope of protection of this utility model. Therefore, the inventiveness and practicality of this utility model are not limited to the form currently shown, but also include all possible and reasonable derivatives and extensions.

Claims

1. A segmented ramped yoke key, characterized by, The fixed key and the side punching key are included, the fixed key is a cuboid with a threaded hole in the middle, and the side punching key has a magnetic yoke side punching key and a rotor support side punching key; The magnetic yoke side punching key and the rotor support side punching key are divided into two parts and arranged on the left and right sides of the fixed key, and one side of the side punching key is a segmented inclined plane.

2. A segmented bevel magnetic yoke key as in claim 1, wherein, The two sides of the middle section of the fixed key are both segmented inclined planes, and the inclined planes of the two kinds of keys are matched with each other and tightly connected.

3. A segmented bevel magnetic yoke key as in claim 1, wherein, The magnetic yoke side punching key is a square, the length of which is less than that of the fixed key, and it is arranged on the left and right sides above the fixed key.

4. A segmented bevel magnetic yoke key as in claim 1, wherein, The rotor support side punching key is a small cuboid, the width of which is less than that of the magnetic yoke side punching key, and the length of which is combined with the length of the magnetic yoke side punching key to be equal to the length of the fixed key, and the rotor support side punching key is arranged on the left and right sides below the fixed key.

5. A segmented bevel magnetic yoke key as in claim 1, wherein, The upper side of the fixed key is provided with a pressing plate, and the pressing plate is connected with the fixed key through bolts and nuts.

6. A segmented bevel magnetic yoke key as in claim 5, wherein, The left and right sides of the center of the pressing plate are provided with washers and bolts.

7. A segmented bevel magnetic yoke key as in claim 1, wherein, The other side of the inclined plane of the magnetic yoke side punching key is provided with a plurality of cylindrical pins.

8. A sectional bevel magnetic yoke key according to claim 1 or 2 or 5, wherein, The tail of the fixed key is provided with a stop block.

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