Device for simulating operation of a rotor drive mechanism under tilted roll-over conditions and simulation apparatus

Abstract

The present application relates to the equipment of reactor control rod safety protection, specifically relates to the device and simulation equipment for simulating the operation of rotor driving mechanism under the condition of inclined overturning, the device comprises: a support; a test body, the middle section of the test body is hinged to the support, and the test body is used for rotating around the hinge; and a traction assembly, the traction assembly is movably arranged on the support, the lead screw of the test body is connected with the traction assembly, and the lead screw of the test body is used for driving the lead screw to move along the lead screw axis direction when the traction assembly moves. By adopting the above-mentioned device for simulating the operation of rotor driving mechanism under the condition of inclined overturning, the prototype structure and the interaction relationship can be simulated more truly, without using the prototype size lead screw, control rod assembly and the like, compared with the traditional simulation device, the installation space of the simulation device is greatly reduced.

Description

Technical Field

[0001] This invention relates to a device for inherent safety protection of reactor control rod drive lines, and more specifically to a device and simulation equipment for simulating the operation of a rotor drive mechanism under tilting and overturning conditions. Background Technology

[0002] The control rod drive mechanism (hereinafter referred to as the drive mechanism) is the actuator of the reactor control and protection systems. It is a key component in the reactor, driving the control rod assemblies to move up and down within the core, thereby controlling the reactor's reactivity and completing reactor startup, power regulation, power maintenance, normal shutdown, and safe shutdown. To ensure that the control rods can be smoothly inserted in special environments (such as power outages, tilting, or overturning) and remain fully inserted until the surrounding environment returns to normal, the drive mechanism is equipped with a self-locking structure.

[0003] In the prototype structure, the lead screw drives the control rod assembly of the reactor. The control rod assembly can still move within a small range at the bottom. In other positions, it needs to perform a downward insertion action. The relative movement between the lead screw and the control rod assembly has a reverse squeezing and influence on the self-locking device. Therefore, in order to verify the effect of the drive mechanism structure design and to verify whether the drive mechanism can operate under special conditions, it is necessary to conduct experimental research under different tilt angle conditions.

[0004] Previous tests only focused on the rotor components, neglecting the impact of loads on the lead screw and control rod assemblies on the self-locking function. Due to installation and manufacturing errors, and the redundant design of the self-locking device, it's possible that even after triggering, the control rod can still move slightly at the bottom, requiring insertion at other positions. This relative movement exerts a reverse pressure and influence on the self-locking device. However, using a prototype structure (reactor equipment) prevents arbitrary tilting and flipping, and makes it impossible to directly assess the self-locking unlocking and insertion functions, significantly impacting the reliability of simulation tests. Summary of the Invention

[0005] The purpose of this invention is to provide a device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions. This device can realistically and reliably reflect the working environment and stress conditions of the prototype structure with as few test pieces as possible, providing test conditions close to the real environment for the study of the operating performance of the drive mechanism under special conditions such as tilting and overturning, and bringing more reliable test results.

[0006] A first aspect of the present invention provides an apparatus for simulating the operation of a rotor drive mechanism under tilting and overturning conditions, comprising:

[0007] support;

[0008] The test body, the middle section of which is hinged to the support, allows the test body to rotate about the hinge point; and

[0009] A traction assembly is movably arranged on a support. The lead screw of the test body is connected to the traction assembly, which is used to drive the lead screw of the test body to move along the axis of the lead screw when the traction assembly is moved.

[0010] By employing the aforementioned device simulating the operation of a rotor drive mechanism under tilting and flipping conditions, the tilting of the test body and the traction component controlling its axial motion within the test body after tilting are integrated into a single, unified device. This allows for adjustment and control of any tilt angle within the range of 0° to 360° by driving the test body and the traction component. The traction component is configured to ensure that the trajectory of the lead screw is essentially consistent with the axis of the test body at the tilt angle. Using this device, the prototype structure and its interactions can be simulated more realistically without the need for prototype-sized lead screws, control rods, etc. Compared to traditional simulation devices, this simulation device significantly reduces installation space.

[0011] In some feasible embodiments, the test body includes:

[0012] A cylindrical body, the middle section of which is hinged to a support;

[0013] A counterweight is disposed inside the cylinder and is connected to the cylinder via a sliding connection structure, allowing the counterweight to slide within the cylinder. The counterweight is connected to a lead screw, enabling the lead screw to move the counterweight within the cylinder.

[0014] The aforementioned cylinder can be configured as a sealed structure. The lead screw or other components that pass through the cylinder can be sealed or dynamically sealed to enclose the entire inner cavity of the cylinder, and the rotor is built into the inner cavity of the cylinder.

[0015] The design of the counterweight slide, the guide rail on the inner wall of the lower cylinder, and the limiting cylinder of the lower cylinder ensures that the shaft core component runs along a straight trajectory under inclined conditions.

[0016] The aforementioned counterweights inside the cylinder can be fitted with guide rails to facilitate tilting of the test body.

[0017] In some feasible embodiments, the traction assembly includes a traction frame, and the cylinder is fixedly connected to the traction frame to form a swing assembly; the support includes a column, and the swing assembly is rotatably connected to the column.

[0018] This connects the traction frame and the cylinder as a whole, allowing the traction frame to serve as a fulcrum for setting up traction components to pull the lead screw on the cylinder, while ensuring that the cylinder and the traction frame remain relatively fixed.

[0019] In some feasible embodiments, the columns are respectively disposed on both sides of the swing assembly;

[0020] One side of the traction frame is hinged to a column, and the other side is fixedly connected to the cylinder.

[0021] One side of the cylinder is hinged to another column, so that the swing assembly is mounted between the two columns;

[0022] A first angle scale is provided at the hinge joint between the cylinder and the column to indicate the rotation angle of the test body.

[0023] In some feasible embodiments, the traction frame is equipped with steering pulleys;

[0024] The traction assembly also includes a traction rope, one end of which is connected to one end of the lead screw, and the other end of which passes around the steering pulley and is connected to the other end of the lead screw;

[0025] The traction frame is equipped with a coiled wire bearing, and a portion of the traction rope is wound around the coiled wire bearing to drive the traction rope to move in the traction direction when the coiled wire bearing is rotated.

[0026] After setting the above-mentioned coil bearing, it is convenient to move the traction rope. During operation, you only need to rotate the coil bearing to drive the traction rope through friction. For ease of operation, you can also set the coil bearing with components such as handles and cranks.

[0027] In some feasible embodiments, the lead screw includes:

[0028] A lead screw guide rod, one end of which extends into the cylinder and the other end is connected to one end of the traction assembly;

[0029] The lead screw body has one end detachably connected to the lead screw guide rod and the other end detachably connected to the counterweight.

[0030] In some feasible embodiments, a sleeve fitted onto the lead screw guide rod and used to radially limit the lead screw is provided in the through hole at one end of the cylinder;

[0031] A counterweight guide rod is provided in the through hole at the other end of the cylinder. One end of the counterweight guide rod is connected to the counterweight, and the other end is connected to the other end of the traction assembly.

[0032] In some feasible embodiments, a guide limiting cylinder is provided inside the cylinder;

[0033] The guide limiting cylinder is located on the side of the counterweight facing the rotor.

[0034] The guide limiting cylinder has a bottom groove on the side facing the rotor to accommodate the rotor.

[0035] The aforementioned guide limit cylinder is installed to limit the stroke of the counterweight when the test body is tilted.

[0036] A second aspect of the present invention also provides a reactor rotor simulation device, including a device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions as described in the first aspect and its improvements, and a rotor mounted on a lead screw within the device; when the device drives the lead screw to move in the axial direction, it drives the rotor to move along the lead screw along the axial direction of the lead screw.

[0037] By using this reactor rotor simulation equipment, the prototype structure and interaction relationships can be simulated more realistically. Compared with traditional simulation devices, the installation space of this simulation device is greatly reduced, making the results obtained from the simulation test more reliable.

[0038] In some feasible embodiments, the test body of the device includes a cylinder, the middle section of which is hinged to a support; the cylinder comprises an upper cylinder and a lower cylinder that are axially connected and fixed together; the lead screw of the test body comprises a lead screw guide rod and a lead screw body that are axially connected and fixed together; the upper end of the lead screw guide rod extends out of the upper cylinder, and the two ends of the lead screw body extend into the upper cylinder and the lower cylinder, respectively; the joint of the lead screw guide rod and the lead screw body is located inside the rotor, and the joint of the upper cylinder and the lower cylinder is located outside the rotor.

[0039] By placing the connection point of the lead screw guide rod and the lead screw body inside the rotor, and the connection point of the upper cylinder and the lower cylinder outside the rotor, the rotor, cylinder and lead screw can have a high degree of connection. When the lead screw is pulled, the rotor, cylinder and lead screw can maintain good coaxiality, making the test results more reliable. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0041] Figure 1 This is a schematic diagram illustrating the overall appearance of the rotor control simulation structure in Embodiment 4.

[0042] Figure 2 This is a schematic diagram of the upper part of the rotor control simulation structure in Embodiment 4;

[0043] Figure 3 This is a top view schematic diagram of the rotor control simulation structure in Embodiment 4;

[0044] Figure 4This is a partial cross-sectional view of the upper part of the rotor control simulation structure in Embodiment 4.

[0045] Figure 5 A cross-sectional view of the device for simulating tilting and flipping conditions in Embodiment 3, with the rotor installed but without the lead screw.

[0046] Figure 6 This is a schematic diagram of the device structure used to illustrate the operation of the rotor drive mechanism under simulated tilting and flipping conditions in Embodiment 1.

[0047] Figure 7 This is a schematic diagram of the device structure used to illustrate the operation of the rotor drive mechanism under simulated tilting and flipping conditions in Embodiment 1.

[0048] Figure 8 This is a schematic diagram of the device structure used to illustrate the operation of the rotor drive mechanism under simulated tilting and flipping conditions in Embodiment 1.

[0049] Figure 9 This is a schematic diagram illustrating the cross-sectional structure within the test body of this embodiment 2;

[0050] Figure 10 This is a schematic diagram of the test body used in Example 2 of the instruction manual when the guide limiting cylinder is not installed;

[0051] Figure reference numerals and corresponding component names:

[0052] 1-Rotating sleeve, 2-Upper cylinder, 3-Lower cylinder, 4-Cylinder observation window, 5-Connecting handle, 6-First angle scale, 7-Lead screw guide rod, 8-Fasting bolt, 9-Flange cover, 10-Through hole, 11-Locking nut, 12-Rotor, 13-Clamping bolt, 141-Upper bearing, 142-Lower bearing, 15-Fixing bolt, 16-Rotor sleeve observation window, 17-Rotor sleeve, 18-Cylinder section flange, 19-Bracket. 20-Test body, 21-Traction assembly, 22-Screw, 23-Cylinder, 24-Traction frame, 25-Column, 27-First pulley, 28-Third pulley, 29-Fourth pulley, 30-Second angle dial, 31-Traction rope, 32-Roller bearing, 33-Screw lug, 34-Screw body, 35-Counterweight, 36-Guide limiting cylinder, 37-Counterweight guide rod, 38-Guide rail, 39-Hinge shaft, 40-Rope hole. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0054] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0055] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0057] Example 1

[0058] A typical reactor control rod drive mechanism consists of a lead screw and control rod assemblies. The weight of these components affects the rotor's self-locking effect. In this embodiment, the gravity of these components was simulated.

[0059] Reference Figures 6 to 10 This embodiment provides a device for simulating the operation of a rotor drive mechanism under tilt and overturning conditions. The device for simulating the operation of a rotor drive mechanism under tilt and overturning conditions includes a support 19, a test body 20, and a traction assembly 21.

[0060] The middle section of the aforementioned test body 20 is hinged to the support 19, so that the test body 20 can rotate around the hinge.

[0061] The aforementioned traction component 21 is movably arranged on the bracket 19. The lead screw 22 of the test body 20 is connected to the traction component 21, and is used to drive the lead screw 22 of the test body 20 to move along the axis of the lead screw 22 when the traction component 21 is moved.

[0062] The bracket 19 here only needs to provide support and fixation. It can be that support columns are set on both sides of the test body 20, and the two sides of the test body 20 (or indirectly through the traction component 21) are hinged to the support columns through the hinge shaft 39. The test body 20 is rotated around the hinge point to simulate the tilting environment of the test body 20 under working conditions. Alternatively, an arched support arm can be set on a fixed support surface, and the two sides of the test body 20 are hinged to the inner side of the arched support arm. Of course, the test body 20 can also be hoisted by suspension. As long as the test body 20 can be fixed and rotated around the connection between the bracket 19 and the test body 20, it is sufficient.

[0063] The aforementioned traction component 21 can be a support platform set on the test body 20, with a lead screw 22 connected to the transmission mechanism on the support platform, driving the transmission mechanism to move the lead screw 22. The transmission mechanism can be a gear mechanism or a gear rack, or a winch, a turntable that pulls the traction rope 31, or a bearing, etc.

[0064] By employing the aforementioned device simulating the operation of a rotor drive mechanism under tilting and flipping conditions, the tilting of the test body 20 and the subsequent control of its axial motion by the traction component 21 within the test body 20 can be considered as a single integrated device. That is, the test body 20 and the traction component 21 rotate synchronously. Here, the hinge shaft 39, which connects the two in series, rotates synchronously with the test body 20 and the traction component 21. The two ends of the hinge shaft 39 are connected to the support columns on both sides of the test body 20 via bearings. By driving the test body 20 and the traction component 21, the tilt angle can be adjusted and controlled within the range of 0° to 360°. The traction component 21 is configured to ensure that the running trajectory of the lead screw 22 is basically consistent with the axis of the test body 20 under the tilt angle. Using this device, the prototype structure and interaction relationships can be simulated more realistically without the need for prototype-sized lead screws, control rods, etc. Compared to traditional simulation devices, the installation space of this simulation device is significantly reduced.

[0065] The aforementioned test body 20 includes:

[0066] The middle section of the cylindrical body 23 is hinged to the bracket 19;

[0067] A counterweight 35 is disposed inside the cylinder 23 and is connected to the cylinder 23 via a sliding connection structure, allowing the counterweight 35 to slide within the cylinder 23. The counterweight 35 is connected to a lead screw 22, enabling the lead screw 22 to move the counterweight 35 within the cylinder 23. The aforementioned sliding connection structure can be a guide rail, slide rail, or similar structure.

[0068] The aforementioned cylinder 23 can be configured as a sealed structure. The lead screw 22 penetrating the cylinder 23 or other cooperating components can be sealed or dynamically sealed to enclose the entire inner cavity of the cylinder 23. The rotor 12 is built into the inner cavity of the cylinder 23.

[0069] The design of the counterweight slide, the inner wall guide rail 38 of the lower cylinder 3, and the guide limit cylinder 36 ensures that the shaft core component runs along a straight trajectory under inclined conditions.

[0070] The counterweight 35 inside the cylinder 23 can be fitted with a guide rail 38. When the test body 20 tilts, the counterweight 35 moves along the guide rail 38 together with the lead screw 22. The connection between the lead screw 22 and the counterweight 35 is preferably a detachable connection, such as a threaded connection or a snap-fit ​​connection.

[0071] Based on the above solution, this embodiment can be further optimized. Specifically, the traction component 21 includes a traction frame 24, and the cylinder 23 is fixedly connected to the traction frame 24 to form a swing component. The support 19 includes a column 25, and the swing component is rotatably connected to the column 25. The aforementioned swing component, i.e., the cylinder 23 and the traction frame 24, form a whole after connection. The cylinder 23 and the traction frame 24 are relatively fixed, and this whole can rotate on the column 25.

[0072] In this way, the traction frame 24 and the cylinder 23 are connected as a whole. The traction frame 24 can be used as a fulcrum to set up the traction component to pull the lead screw 22 on the cylinder 23, while ensuring that the cylinder 23 and the traction frame 24 remain relatively fixed.

[0073] The aforementioned columns 25 are respectively disposed on both sides of the swing assembly; one side of the traction frame 24 is hinged to one column 25, and the other side is fixedly connected to the cylinder 23; one side of the cylinder 23 is hinged to another column 25, so that the swing assembly is mounted between the two columns 25; a second angle scale 30 is provided at the hinge point between the cylinder 23 and the column 25 to indicate the rotation angle of the test body 20.

[0074] After setting the second angle dial 30, a pointer can also be configured, that is, a pointer can be set on the outer circle of the column 25 or the bearing used for the hinge connection, so that the operator can easily understand the rotation angle after tilting.

[0075] The traction frame 24 is equipped with steering pulleys (as shown in the figure: first pulley 27, second pulley, third pulley 28, and fourth pulley 29 of the traction frame); the traction assembly 21 also includes a traction rope 31, one end of which is connected to one end of the lead screw 22, and the other end of which passes around the steering pulley and is connected to the other end of the lead screw 22; wherein, a coil bearing 32 is provided on the traction frame 24, and a portion of the traction rope 31 is wound around the coil bearing 32, which is used to drive the traction rope 31 to move in the traction direction when the coil bearing 32 is rotated. The coil bearing 32 facilitates the movement of the traction rope 31. During operation, it is only necessary to rotate the coil bearing 32 to drive the traction rope 31 through friction. For ease of operation, a handle, a rotating handle, or other components can also be provided on the coil bearing 32. When setting the coil bearing 32, since the traction frame 24 and the hinge shaft 39 (which can be fixed by means of snap-fit, screw connection, etc.) are in a state of synchronous rotation, a rope hole 40 can be set on the hinge shaft 39 to facilitate the passage of the traction rope 31.

[0076] Preferably, the position of the coil bearing 32 on the traction frame 24 is on a straight line with the hinge position of the cylinder 23, the traction frame 24, and the column 25. The extension direction of this straight line can be set to be perpendicular to the movement direction of the lead screw 22, and the line connecting the cylinder 23, the traction frame 24, and the coil bearing 32 passes through the center of the three.

[0077] The aforementioned lead screw 22 includes a lead screw guide rod 7 and a lead screw body 34.

[0078] One end of the lead screw guide rod 7 extends into the cylinder 23, and the other end is connected to one end of the traction assembly 21;

[0079] One end of the lead screw body 34 is detachably connected to the lead screw guide rod 7, and the other end is detachably connected to the counterweight 35.

[0080] A sleeve is provided in the through hole at one end of the cylinder 23 for radially limiting the lead screw 22 and is fitted onto the lead screw guide rod 7.

[0081] A counterweight guide rod 37 is provided in the through hole at the other end of the cylinder 23. One end of the counterweight guide rod 37 is connected to the counterweight 35 inside the cylinder 23, and the other end is connected to the other end of the traction assembly 21.

[0082] The entire lead screw 22 that mates with the cylinder 23 is configured as at least three parts: the lead screw guide rod 7, the lead screw body 34, and the counterweight guide rod 37. This configuration not only facilitates assembly and installation and avoids the lead screw body 34 being directly exposed outside the cylinder 23, but also serves as an experimental simulation device. To ensure that the total weight is consistent with the prototype control rod assembly, if the entire lead screw 22 were used to simulate the weight of the entire control rod assembly, the length of the entire simulation device would be too long. Therefore, this device uses a combination of the counterweight guide rod 37 and the counterweight 35. This configuration results in the entire lead screw 22 being designed and connected separately in the connecting parts of the cylinder 23 (lead screw guide rod 7, lead screw body 34, counterweight 35, and counterweight guide rod 37).

[0083] In other words, in the prototype reactor structure, the lead screw is long, but this length does not affect the function and performance of the self-locking device. However, the total weight of the reactor's control rod assembly does affect the function and performance of the self-locking device. The simulation device in this embodiment ensures that the self-locking function operates normally while maintaining the same weight as the prototype control rod assembly. The lead screw has undergone significant length optimization, resulting in a substantial reduction in installation space compared to traditional simulation devices. The lead screw guide rod 7 and the counterweight guide rod 37 can be smooth rods. Dynamic seals at the top and bottom of the cylinder ensure that the cylinder 23 remains sealed during operation of the entire linkage device, and the container is filled with water or other liquid media. When filling with liquid media, it can be done by filling with liquid media before sealing, and then sealing the container.

[0084] Based on the above embodiments, further optimization is possible, namely, a guide limiting cylinder 36 is provided inside the cylinder 23; the guide limiting cylinder 36 is located on the side of the counterweight 35 facing the rotor 12; the side of the guide limiting cylinder 36 facing the rotor 12 is provided with a bottom groove for accommodating the rotor 12. The guide limiting cylinder 36 is provided to limit the stroke of the counterweight 35 when the test body 20 is tilted.

[0085] The aforementioned guide limiting cylinder 36 can be fixed by connecting the outer circle of the guide limiting cylinder 36 to the inner wall of the cylinder 23. A through hole for the lead screw 22 to pass through is provided in the middle of the bottom groove of the guide limiting cylinder 36, and a gap is left between the through hole and the lead screw 22.

[0086] Example 2

[0087] A reactor rotor simulation device includes a device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions, as described in Embodiment 1 and its improved versions, and a rotor 12 mounted on a lead screw 22 within the device; when the device drives the lead screw 22 to move in the axial direction, it drives the rotor 12 to move along the axis of the lead screw 22.

[0088] By using this reactor rotor simulation equipment, the prototype structure and interaction relationships can be simulated more realistically. Compared with traditional simulation devices, the installation space of this simulation device is greatly reduced, making the results obtained from the simulation test more reliable.

[0089] In some feasible embodiments, the test body 20 of the device includes a cylinder 23, the middle section of which is hinged to a support 19; the cylinder 23 includes an upper cylinder 2 and a lower cylinder 3 that are axially connected and fixed; the lead screw 22 of the test body 20 includes a lead screw guide rod 7 and a lead screw body 34 that are axially connected and fixed; the upper end of the lead screw guide rod 7 extends out of the upper cylinder 2, and the two ends of the lead screw body 34 extend into the upper cylinder 2 and the lower cylinder 3, respectively; the joint of the lead screw guide rod 7 and the lead screw body 34 is located inside the rotor 12, and the joint of the upper cylinder 2 and the lower cylinder 3 is located outside the rotor 12.

[0090] After setting the upper and lower cylinders, preferably, the upper end face of the guide limiting cylinder 36 can be fixedly connected to the top of the lower cylinder to minimize the contact between the outer circle of the guide limiting cylinder 36 and the cylinder.

[0091] By placing the connection point of the lead screw guide rod 7 and the lead screw body 34 inside the rotor 12, and placing the connection point of the upper cylinder 2 and the lower cylinder 3 outside the rotor 12, the rotor 12, cylinder 23 and lead screw 22 can have a high degree of connection. When the lead screw 22 is pulled, the rotor 12, cylinder 23 and lead screw 22 can maintain good coaxiality, making the test results more reliable.

[0092] In the specific setup, one side of the lower cylinder 3 of the test body 20 is connected to the rotating shaft 4 led out from the turbine reducer via a flipping support block, and the flipping support block on the other side of the lower cylinder 3 of the test body 20 is connected to the traction frame 24 via bolts. The traction frame 24 is connected to the bearing of the column 25 via a rotating shaft, and the length of the traction frame 24 covers the axial travel of the moving parts (screw 22, rotor 12, counterweight 35 and counterweight guide rod 37) inside the test body 20. The traction rope 31 (steel wire rope) extending from the screw lug 33 on the lead screw guide rod 7 is connected to the first pulley 27, the second pulley, the coiled wire bearing 32 behind the traction frame 24, and then to the screw lug 14 on the counterweight guide rod 37 via the third pulley 28 and the fourth pulley 29. The first pulley 27 and the fourth pulley 29 are concentrically designed with the main body (concentric design means that the positioning of the pulleys is concentric with the main body in the spatial radial direction, thus ensuring that the movement of the connecting rod traction by the steel wire rope does not deviate from the axial movement of the container center during operation in the container). The coiled wire bearing 32 or the crank on the coiled wire bearing 32 can pull the traction rope 31 clockwise and counterclockwise. The worm gear reducer and bearing are bolted to two columns 25, and the two columns 25 are bolted to the base plate to ensure the reliability and stability of the drive mechanism overturning test device during the overturning process. The second angle scale 30 is set on the worm gear reducer. The aforementioned coil bearing 32 can be a mounting bracket that is offset from the hinge shaft 39 and is set on the side of the traction frame 24 away from the cylinder 23. The mounting bracket is equipped with a coil, and the traction rope 31 passes around the coil and through the rope hole 40.

[0093] Appendix Figure 2 In the prototype structure, the bottom of the lead screw body 34 is connected to the counterweight 35. The counterweight 35 simulates the total weight of the control rod assembly and other lead screw parts except the lead screw body 34 in the prototype structure. The lead screw body 34 and the counterweight 35 simulate the actual load of the drive mechanism in the prototype structure. The lower end of the counterweight 35 is connected to the counterweight guide rod 37. Preferably, the counterweight 35 is made of lead, and by encapsulating it in stainless steel, contamination of the medium is avoided. The counterweight 35 has a sliding groove 20 on its exterior, and a guide limiting cylinder 36 is provided inside the cylinder 23. The guide limiting cylinder 36 is installed in the lower cylinder 3 of the test body 20. At the same time, the inner wall of the lower cylinder 3 of the test body 20 has a guide rail 38. The sliding groove 20 and the guide rail 38 cooperate with the limiting guide cylinder 21 to realize the running guidance and stroke limitation of the counterweight 35 under inclined conditions. The guide limiting cylinder 36 can also prevent the counterweight 35 from colliding with the test rotor 12 during the lifting process.

[0094] As attached Figure 3As shown, a lead screw body 34, which is installed to match the rotor 12, is included. The key part of the lead screw body 34, namely the lead screw portion installed inside the rotor 12, has the same structure and relative position in the drive mechanism as the prototype structure. The lower half of the lead screw body 34, which is not inside the rotor 12, is a shortened portion of the lead screw. The upper end of the lead screw body 34 is connected to the lead screw guide rod 7, and the lower end is connected to the counterweight 35. A rubber O-ring is designed at the connection between the lead screw guide rod 7 and the inner wall of the upper cylinder 2, and a rubber O-ring is designed at the connection between the counterweight guide rod 37 and the inner wall of the lower cylinder 3. The O-ring design ensures the dynamic seal between the upper and lower parts of the test body 20, providing a sealed, water-filled test environment for the experiment. The lead screw guide rod 7, the counterweight guide rod 37, and the traction rope 31 on the traction frame 24 are connected in series. This ensures the sealing of the body and allows the shaft of the body, i.e., the lead screw guide rod 7, the counterweight guide rod 37, the lead screw body 34, and the counterweight 35, to move linearly upward and downward via a crank handle.

[0095] The counterweight guide rail 38 and the slide groove 20 ensure that the counterweight 35 and the lead screw body 34 maintain coaxiality with the test body 20 during movement, and adjust and control the linear movement of the axis (lead screw 22 + counterweight 35) of the test body 20 at any angle. The lead screw 22 mentioned here refers to the lead screw body 34, the lead screw guide rod 7, and the counterweight guide rod 37.

[0096] During the test, the test body 20 is tilted and flipped by a worm gear reducer to simulate the operating conditions of the drive mechanism under floating conditions. The lead screw body 34 and the counterweight 35 are lifted, lowered and locked at any flipping angle. The test body 20 is flipped at several tilting angles under several test conditions. If the test body 20 cannot lift the lead screw body 34 at a certain tilting angle, it can be preliminarily judged that self-locking has occurred. The tilting angle of the test body 20 where self-locking occurred is recorded by the second angle scale 30.

[0097] During operation, the test body 20 is kept at a 0° rotation angle, and the lead screw 22 is lifted as a whole. Under the rotation angle of the test rotor 1224, the test body 20 is rotated to the above-mentioned test tilt angle. At this time, the self-locking device is triggered, and the coil bearing 32 pulls the lead screw body 34 to insert downwards. It is verified whether the insertion function of the control rod is affected after the self-locking device is triggered. If the insertion is successful, it means that the insertion function of the drive mechanism is not affected after the self-locking device is triggered, thus controlling the nuclear reaction.

[0098] Example 3

[0099] In the reactor rotor, the drive mechanism rotor component works with the lead screw, and through the power control system and other components of the drive mechanism, the rotation of the rotor is controlled, thereby realizing the lifting, lowering and holding of the lead screw and control rod.

[0100] In special environments (such as tilting or flipping), to prevent system malfunctions and safety accidents caused by the control rod detaching from the bottom position or failing to fully insert, the drive mechanism rotor is designed with a special self-locking unlocking structure. To verify the effectiveness of the self-locking unlocking structure under power failure conditions and to obtain the self-locking and unlocking behavior of the rotor at different rotation angles, the rotor's working environment needs to be simulated using an experimental device in the early stages of development. This also allows for the identification, adjustment, and control of the rotor's rotational position.

[0101] Previous experiments only used air as the environmental condition, manually rotating the bearing to change the rotor's circumferential rotation angle and observing whether the self-locking device was triggered to determine if self-locking had occurred. However, this method could not simulate the actual environmental conditions of the rotor under experimental conditions, nor could it accurately control the rotor's circumferential rotation angle, resulting in relatively crude experimental results. In reality, the rotor is enclosed inside the reactor, surrounded by a water-filled medium. Differences in the properties of the environmental medium affect the resistance, buoyancy, and other forces acting on the rotor's self-locking device. This means that when the environmental medium is air, the rotation and overturning angles of the rotor when self-locking unlocking occurs cannot be accurately obtained.

[0102] Therefore, this implementation example Figures 1 to 5 As shown, a device for controlling the rotation angle of a rotor is provided. This device is used to control the rotation of a rotor 12 equipped with a self-locking device, thereby controlling a lead screw or control bar that is drively connected to the rotor 12. The device includes:

[0103] A cylindrical body, with both ends of the cylindrical body being open;

[0104] Rotary sleeve 1, one end of which is connected to one end of the cylinder body through a dynamic seal, and the other end of which extends out of the cylinder body;

[0105] A lead screw is sequentially disposed through the rotating sleeve 1 and the cylinder body. The lead screw is sequentially disposed through the rotating sleeve and the cylinder body, and the other end of the lead screw is connected to the cylinder body through a dynamic sealing element, so that the inner cavity of the cylinder body forms a sealed cavity to accommodate the rotor.

[0106] One end of the rotating sleeve 1 extends into the cylinder body, and the extended part is provided with a groove that is recessed in the axial direction of the rotating sleeve 1 for the rotor 12 to extend into.

[0107] The inner surface of its lower end and the circumferential notch of the clamping nut adopt a keyway fit structure. At the same time, a bolt structure is introduced to connect the rotating sleeve 1 and the notch of the clamping nut in series, which is used to fix the relative position between the rotating sleeve 1 and the clamping nut of the rotor 12.

[0108] By adopting the above scheme, the circumferential notch of the clamping nut at the upper end of the rotor 12 is used as the rotation force point. A rotating sleeve 1 is designed, and its lower inner surface is fitted with the circumferential notch of the clamping nut using a keyway structure. At the same time, a bolt structure is introduced to connect the rotating sleeve 1 and the clamping nut notch in series to fix the relative position between the rotating sleeve 1 and the clamping nut of the rotor 12.

[0109] The cylinder is provided with a rotor sleeve 17, which is fixedly connected to the cylinder. The rotor sleeve 17 is mounted on the outside of the rotor 12 through a bearing, so that the rotor 12 can rotate relative to the rotor sleeve 17 along the axis of the rotor 12.

[0110] When the above-mentioned bearing is installed, the upper and lower ends of the rotor sleeve 17 can each be provided with a stop. The upper stop is used for axial and radial limiting of the upper bearing 141 of the rotor 12, and the lower stop is used for axial limiting of the lower bearing 142. The use of the above-mentioned rotor sleeve 17 ensures the stability of the rotor 12 installed inside the sleeve and the reliability of its operation during special environment (such as tilting or overturning) tests.

[0111] The model and specifications of the bearings used in the above-mentioned configuration can be adjusted according to actual needs, as long as they can ensure radial limiting of the rotor 12 and ensure that the rotor 12 can rotate smoothly relative to the cylinder and rotor sleeve 17.

[0112] The cylindrical body is open at both ends. When the rotating sleeve 1 and the lead screw pass through the cylindrical body, they are radially limited by the holes at both ends of the cylindrical body or other components (such as rolling bearings, sliding bearings, or sliding friction plates) within the holes. The cylindrical body is generally cylindrical. The two ends of the cylindrical body can be connected to the rotating sleeve 1 and the lead screw in the form of flanges, which seal the inner cavity of the cylindrical body. For sealing, a sealing ring can be set on the inner side of the flange. For example, an circumferential groove is set on the inner side of the flange, and the sealing ring is arranged in the circumferential groove and abuts against the rotating sleeve 1 to achieve a seal.

[0113] The aforementioned lead screw includes an upper lead screw guide rod 7 and a lower lead screw that is threadedly connected to the lead screw guide rod 7.

[0114] The portion of the rotating sleeve 1 that extends into the cylinder body can extend outward to form a raised edge. The upper side of the raised edge abuts against the inner side of the upper end of the cylinder body (the inner side of the end face flange or flange cover 9). Specifically, for example, a rubber O-ring is installed in the O-ring groove designed on the inner wall of the rotating sleeve 1 to ensure the axial dynamic seal between the lead screw guide rod 7 and the rotating sleeve 1.

[0115] The above embodiment can be further optimized, wherein the cylinder comprises at least two cylinder units that are sequentially and sealed together along the axial direction. Setting the cylinder as multiple segments improves the flexibility of its application.

[0116] In this embodiment, the cylindrical unit can be divided into two sections: an upper cylindrical unit 2 and a lower cylindrical unit 3. Adjacent cylindrical units are connected by flanges. When manufacturing the cylindrical units, at least one cylindrical unit can be manufactured according to the dimensions of the rotor 12 to be tested, ensuring that the rotor 12 can be fixed within one of the cylindrical units. The rotor sleeve 17 described above provides installation space and fixation for the rotor inside the cylindrical unit; preferably, the rotor sleeve can be provided in the upper cylindrical unit 2.

[0117] The upper surface of the lower end of the rotating sleeve is axially fixed to the container body via the container flange cover 9 and bolts. Circumferential movement can occur between the upper surface of the lower end of the rotating sleeve and the container flange cover 9. The rotation of the rotor 12 inside the body is driven by the bolt 13. By designing a wedge block and assembling it in the rotor 12, the engagement action of the rotor 12's opening and closing nut is simulated when the rotor 12 is energized. The screw thread engages with the opening and closing nut of the rotor 12. The screw guide rod 77 is connected to the upper end of the screw via a thread. The rotation of the rotor 12 lifts and lowers the screw, simultaneously driving the screw guide rod 77 to move. The screw guide rod 77 moves axially on the inner wall of the rotating sleeve 11.

[0118] Based on the above scheme, it can be further optimized by providing the rotor sleeve 17 within at least one section of the cylindrical body. This arrangement of at least two cylindrical body sections sequentially and sealed together axially modulates the cylindrical body. This not only reduces the manufacturing length of the rotor sleeve 17 (by fixing the upper and lower ends of the rotor sleeve 17 within one of the cylindrical body sections), but also allows the cylindrical body length to be designed according to actual needs or other functional structures.

[0119] In specific configuration, the rotor sleeve 17 is fixed to the upper cylinder 2 by fixing bolts 15. The upper and lower ends of the rotor sleeve 17 are designed with stop mouths. The upper stop mouth is used for axial and radial limiting of the upper bearing 141 of the rotor 12, and the lower stop mouth is used for axial limiting of the lower bearing 142 of the rotor 12. At the same time, the lower flange of the upper cylinder 2 and the lower stop mouth of the rotor sleeve 17 cooperate to fix the lower bearing 142 of the rotor 12 axially and radially, ensuring the stability of the rotor 12 installed inside the device and the reliability of its operation during special environment (such as tilting and flipping) tests.

[0120] Specifically, the cylindrical unit includes a cylindrical body and cylindrical section flanges 18; the unit flanges are arranged at both ends of the cylindrical body; the cylindrical section flanges 18 are used for sealing connection with the cylindrical section flanges 18 of adjacent cylindrical units, or the cylindrical section flanges 18 are used for sealing connection with the flange covers 9 located at both ends of the cylindrical body. The connection is made through flanges, which facilitates assembly and disassembly, and makes the docking and sealing of the cylindrical units more convenient.

[0121] Based on the above solution, further optimization is possible. A transparent observation window 4 is arranged on the cylindrical unit; a transparent rotor sleeve observation window 16, corresponding to the observation window 4, is arranged on the rotor sleeve 17. The aforementioned observation windows 4 and 16 facilitate observation of the position and state of the rotor 12 inside the cylindrical unit. This solves the problem of determining the position and rotation angle of the rotor 12 under enclosed and invisible conditions. The number, height, and size of the observation windows 4 can be set according to actual needs.

[0122] Based on the above scheme, further optimization is possible. A first angle scale 6 is provided at the upper end of the cylinder. The scale lines on the first angle scale 6 are arranged around the rotating sleeve 1. A pointer corresponding to the scale lines is provided on the rotating sleeve 1. When the sleeve 1 is rotated, the rotation angle can be obtained by comparing the pointer with the first angle scale 6, facilitating identification. The first angle scale 6 is mounted on the upper surface of the flange cover 9 via the rotating sleeve 1, and is zeroed and fixed using a slotted hole and fastening bolts 8.

[0123] Based on the above scheme, it can be further optimized by providing a through hole 10 arranged radially along the rotating sleeve 1 at one end of the cylinder body; a locking nut 11 with its end for tightening the rotating sleeve 1 is internally threaded into the through hole 10. Tightening the locking nut 11 can fix the circumferential relative position between the rotating sleeve 1 and the cylinder body.

[0124] Based on the above scheme, it can be further optimized. A connecting handle 5 is provided on the circumferential surface of the outer part of the rotating sleeve 1. By rotating the connecting handle 5 on the outside, the rotor 12 inside the cylinder can be driven to rotate.

[0125] Example 4

[0126] A rotor control simulation structure includes a device for controlling the rotation angle of a rotor as described in Embodiment 1 and its improvements; the rotor control simulation structure also includes a rotor 12.

[0127] The rotor 12 is provided with a clamping nut. The circumferential notch of the clamping nut adopts a keyway fit structure. At the same time, a bolt structure is introduced to connect the rotating sleeve 1 and the clamping nut notch in series to fix the relative position between the rotating sleeve 1 and the clamping nut of the rotor 12.

[0128] By adopting this rotor control simulation structure, rotational simulation control experiments can be conducted in liquid media, making the experimental results more reliable.

[0129] The above-described specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions, characterized in that, include: support; The test body is hinged to the support in the middle section, which allows the test body to rotate around the hinge. as well as A traction assembly is movably arranged on a support. The lead screw of the test body is connected to the traction assembly, which is used to drive the lead screw of the test body to move along the axis of the lead screw when the traction assembly is moved. The test body includes: A cylindrical body, the middle section of which is hinged to a support; A counterweight is disposed inside the cylinder and connected to the cylinder via a sliding connection structure, which allows the counterweight to slide within the cylinder; the counterweight is connected to a lead screw, which allows the lead screw to drive the counterweight to move within the cylinder. The traction assembly includes a traction frame, and the cylinder is fixedly connected to the traction frame to form a swing assembly; The support includes a column, and the swing assembly is rotatably connected to the column; The columns are respectively installed on both sides of the swing assembly; One side of the traction frame is hinged to a column, and the other side is fixedly connected to the cylinder. One side of the cylinder is hinged to another column, so that the swing assembly is mounted between the two columns; A first angle scale is provided at the hinge joint between the cylinder and the column to indicate the rotation angle of the test body. The traction frame is equipped with steering pulleys; The traction assembly also includes a traction rope, one end of which is connected to one end of the lead screw, and the other end of which passes around the steering pulley and is connected to the other end of the lead screw; The traction frame is equipped with a coiled wire bearing, and a portion of the traction rope is wound around the coiled wire bearing to drive the traction rope to move in the traction direction when the coiled wire bearing is rotated.

2. The device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions according to claim 1, characterized in that, The lead screw includes: A lead screw guide rod, one end of which extends into the cylinder and the other end is connected to one end of the traction assembly; The lead screw body has one end detachably connected to the lead screw guide rod and the other end detachably connected to the counterweight.

3. The device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions according to claim 2, characterized in that, A sleeve is provided in the through hole at one end of the cylinder for radially limiting the lead screw, and is fitted onto the lead screw guide rod. A counterweight guide rod is provided in the through hole at the other end of the cylinder. One end of the counterweight guide rod is connected to the counterweight, and the other end is connected to the other end of the traction assembly.

4. The device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions according to claim 1, characterized in that, A guide limiting cylinder is provided inside the cylinder; The guide limiting cylinder is located on the side of the counterweight facing the rotor. The guide limiting cylinder has a bottom groove on the side facing the rotor to accommodate the rotor.

5. A reactor rotor simulation device, comprising a device for simulating the operation of a rotor drive mechanism under tilting and overturning conditions as described in any one of claims 1 to 4, and further comprising a rotor mounted on a lead screw within the device; when the device drives the lead screw to move in the axial direction, it drives the rotor to move along the axis of the lead screw.

6. A reactor rotor simulation device according to claim 5, characterized in that, The test body of the device includes a cylinder, the middle section of which is hinged to a support. The cylinder body includes an upper cylinder and a lower cylinder that are axially connected and fixed together, and the lead screw of the test body includes a lead screw guide rod and a lead screw body that are axially connected and fixed together. The upper end of the lead screw guide rod extends out of the upper cylinder, and the two ends of the lead screw body extend into the upper cylinder and the lower cylinder, respectively. The connection point between the lead screw guide rod and the lead screw body is located inside the rotor, while the connection point between the upper cylinder and the lower cylinder is located outside the rotor.

Images