A nuclear reactor driving mechanism

Abstract

The invention discloses a nuclear reactor driving mechanism, wherein a driving component comprises a motor and a driving gear arranged at the output end of the motor, a driven gear is coaxially sleeved on the outside of the driving gear, a rack-type driving rod is meshed on the outside of the driven gear, the number of teeth of the driving gear is the same as the number of teeth on the inner side of the driven gear, and the tooth groove width of the driving gear and the tooth groove width on the inner side of the driven gear are both greater than their respective tooth thicknesses, a control component comprises a latch and a power unit, the latch is provided with a plurality of plug rods arranged along the circumferential direction of the driving gear, the power unit is used to drive the latch to move toward or away from the driving gear, and to insert the plug rod into or out of the overlapping portion, and by adopting the scheme, the rack-type driving rod can move more smoothly through the gear rack transmission method, and the rack-type driving rod can move when it is powered on and fall off when it is powered off through the cooperation of the internal and external gears, and the motor self-locks to make the rack-type driving rod stay at any position, thereby improving the stability and smoothness of the rack-type driving rod during movement and reducing energy consumption.

Description

Technical Field

[0001] The invention relates to the field of control rod driving mechanisms for power plant reactors, and in particular to a driving mechanism for a nuclear reactor. Background Art

[0002] The control rod drive mechanism (CRDM) is a servo mechanism of the nuclear power plant reactor control system and safety protection system. The CRDM is used to lift, lower and maintain the reactor to start the reactor, adjust the reactor power, maintain power, stop the reactor and quickly shut down the reactor in the event of an accident. It is an important moving part of the nuclear reactor and one of the key equipment that directly affects the normal operation, safety and reliability of the nuclear reactor.

[0003] The control rod drive mechanisms of the "stepping magnetic lifting reactor control rod drive mechanism" (ZL200710050738.9) and the "reactor control rod drive mechanism" (ZL 201610774110.2) in the disclosed invention patents have complex structures, and the movement of the control rods rising and falling is performed in segmented non-continuous control. In the process of adjusting the control rod drive mechanism by magnetic field control, interference is easily caused between the magnetic fields, and the control rods are discontinuous during the lifting process, the control of the control rod drive mechanism is unstable, and the lifting and lowering of the control rods driven by the magnetic field consumes a lot of energy and is costly. Summary of the invention

[0004] The present invention aims to solve the deficiencies of the prior art and to provide a nuclear reactor driving mechanism. The rack-and-pinion transmission method is used to make the rack-type driving rod move more smoothly, and the internal and external gears cooperate to make the rack-type driving rod move when powered on and fall off when powered off, and the motor self-locks to make the rack-type driving rod stay at any position, thereby improving the stability and smoothness of the rack-type driving rod during movement and reducing energy consumption.

[0005] The present invention is achieved through the following technical solutions:

[0006] A nuclear reactor drive mechanism, comprising a drive assembly and a control assembly;

[0007] The driving assembly includes a motor and a driving gear arranged at the output end of the motor, a driven gear is coaxially sleeved outside the driving gear, and a gap is left between the driving gear and the driven gear; the inner and outer sides of the driven gear are provided with gears, and the outer side of the driven gear is meshed with a rack-type driving rod;

[0008] The number of teeth of the driving gear is the same as the number of teeth on the inner side of the driven gear, and the tooth gap width of the driving gear and the tooth gap width on the inner side of the driven gear are both greater than their respective tooth thicknesses;

[0009] The control assembly includes a latch and a power unit, wherein the latch is movably arranged on a side of the motor away from the driving gear, and the latch is provided with a plurality of plug rods arranged along the circumferential direction of the driving gear, wherein the plug rods are parallel to the axis of the driving gear, and the ends of the plug rods are directly opposite to the overlapped portion of the tooth groove width between the driving gear and the driven gear;

[0010] The power unit is used to drive the latch pin to move toward or away from the driving gear, and to insert the insertion rod into or out of the overlapping portion; when the insertion rod is inserted into the overlapping portion, it is used to drive the driving gear and the driven gear to rotate synchronously.

[0011] Compared with the prior art, the movement of the control rod rising and falling is performed as segmented discontinuous control. In the process of adjusting the control rod driving mechanism by magnetic field control, interference is easily caused between magnetic fields, and the control rod is discontinuous during the lifting process, the control of the control rod driving mechanism is unstable, and the lifting and lowering of the control rod by magnetic field driving consumes a lot of energy and has high cost. The present invention provides a nuclear reactor driving mechanism, which includes a driving component, the driving component includes a motor, and the motor is used to drive the driving gear to rotate. Since a driven gear is coaxially arranged outside the driving gear, and a gap is left between the outer side of the driving gear and the inner side of the driven gear, it is preferred that the tooth top circle of the driving gear is tangent to the inner tooth top circle of the driven gear. Therefore, in the process of the motor driving the driving gear to rotate, the driven gear is still in a stationary state, and the rotation of the driving gear cannot drive the driven gear to rotate synchronously; and in order to drive the driven gear to rotate, a control component is also provided, and the control component includes a movable latch, which can move along the axis of the driving gear and rotate around its own axis; a plurality of plungers are evenly distributed on the circumference of the latch; since the teeth of the driving gear The number of teeth on the inner side of the driven gear is the same as that on the inner side of the driven gear, and the tooth width of the driving gear and the tooth width on the inner side of the driven gear are both greater than their respective tooth thicknesses. Therefore, when the driven gear is at any position relative to the driving gear, the tooth width inside the driven gear and the tooth width of the driving gear have an overlapping portion, that is, a connecting portion. Therefore, the power unit can drive the insertion rod to be inserted into the overlapping portion, so that the driving gear and the driven gear are relatively fixed. When the driving gear rotates, it can simultaneously drive the latch pin and the driven gear to rotate synchronously, thereby driving the rack-type driving rod to move up and down through the driven gear; wherein the rack-type driving rod The rod is a driving rod with a rack on the side; in normal operation, the rack-type driving rod can be controlled to rise or fall by controlling the forward and reverse rotation of the driving gear; if the rack-type driving rod is to stay at a certain position, the driving gear can be controlled to be stationary by the motor; and when the power unit drives the pin to withdraw from the overlapping part and the motor has no power, the driving gear stops rotating, and the rack-type driving rod moves downward under its own gravity, and in the process of moving, it also drives the driven gear meshing with it to rotate, and blocks the nuclear reaction, thereby ensuring the safety of the nuclear reaction.

[0012] The above scheme aims to achieve: through the drive of the power unit, the insertion rod is inserted into the overlapping part of the internal tooth width of the driven gear and the tooth width of the driving gear, and the driven gear is driven to rotate by the driving gear to drive the rack-type driving rod that is meshed with the outside of the driven gear to move; that is, through the gear and rack transmission method, the movement of the rack-type driving rod is smoother, and through the cooperation of internal and external gears, the rack-type driving rod can move when powered on and fall off when powered off, and the motor self-locks to make the rack-type driving rod stay at any position, thereby improving the stability and smoothness of the rack-type driving rod during movement and reducing energy consumption.

[0013] In order to protect and fix the drive assembly and the control assembly inside, a shell with a through hole is also included, and the two ends of the shell are respectively provided with a front cover plate and a rear cover plate for closing the ends of the through hole; the drive assembly and the control assembly are both located in the through hole; the motor is also provided with a connecting rod on the side away from the drive gear, and the two ends of the connecting rod are respectively fixedly connected to the motor and the rear cover plate; the two ends of the rack-type drive rod pass through the shell. Among them, the front cover plate and the rear cover plate can be detachably connected to the two ends of the shell, and the motor is fixed in the through hole by the connecting rod, so that the drive gear is suspended in the air to avoid friction between the front cover plate; the two ends of the rack-type drive rod pass through the shell, and are used to control the reactor by rising or falling.

[0014] As a specific implementation of a latch, the latch also includes a cross arm, the connecting rod and the driving gear are coaxially arranged, the middle part of the cross arm has a round hole for sleeved the connecting rod, and the cross arm and the connecting rod are movably connected: the cross arm can slide along the length direction of the connecting rod, and can rotate around the axis of the connecting rod; a plurality of the insertion rods are arranged at the end of the cross arm; the power unit is used to drive the cross arm to slide along the length direction of the connecting rod. In the above scheme, the middle part of the cross arm is a hollow ring shape, the cross arm is sleeved on the connecting rod, and the inner diameter of the ring shape in the middle part of the cross arm is slightly larger than the rod diameter of the connecting rod, which is used for the latch to slide along the axis direction of the connecting rod, or rotate around the axis without shaking.

[0015] In order to improve the stability of transmission, the latch has several cross arms in the same plane, and the cross arms share a circular hole; a plug rod is vertically provided at the end of each cross arm; the plug rods at both ends of any cross arm are symmetrical along the axis of the connecting rod, and the vertical distance between the plug rods at both ends of any cross arm is the same as the root circle diameter of the driving gear. In the above scheme, at least one group of cross arms is provided, and the number of groups of cross arms can be any number greater than one, and the specific number of groups can be specifically defined according to actual conditions, and the middle parts of the multiple groups of cross arms are all hollow circular rings, and they are all the same central circular ring, and the multiple groups of cross arms are all located in the same plane, and two parallel plug rods are respectively provided at both ends of the cross arms, the plug rods are perpendicular to the cross arms, and the two plug rods are symmetrical about the central axis of the cross arms.

[0016] As a specific implementation of a power unit, the power unit includes an electromagnet, which is arranged on the side of the motor away from the driving gear, and has a gap between it and the connecting rod; the electromagnet is used to absorb the latch and slide along the length direction of the connecting rod; the connecting rod is made of non-magnetic material; and there is a spring between the electromagnet and the cross arm. In the above scheme, the electromagnet is fixedly installed on the side wall of the connecting rod by bolts, and is spaced apart from the connecting rod, and is close to the top of the motor, so that it is convenient to connect to the power supply separately; the electromagnet is energized to absorb the latch, so that the latch moves along the axial direction of the connecting rod, and a spring is arranged between the electromagnet and the latch, one end of the spring is movably installed on the top of the latch, and the other end of the spring is movably installed on the electromagnet, so that when the electromagnet is not energized, the latch is reset under the elastic force of the spring.

[0017] In order to increase the adsorption rate, a number of electromagnets are evenly distributed along the circumferential direction of the connecting rod, and a gap is left between the electromagnets and the connecting rod, and they are all powered by the motor. In the above scheme, at least two groups of electromagnets are provided, and the number of electromagnets can be any number of groups greater than two; wherein the number of groups of electromagnets can be set to five groups, and the five groups of electromagnets are all fixed to the side wall of the connecting rod with bolts and close to the top of the motor, and are all used to connect to the power supply, and are all spaced apart from the connecting rod, and the spacing is consistent, so as to increase the adsorption force of the electromagnet on the pin after power is supplied, and increase the speed at which the pin is inserted into the overlapped portion of the tooth groove width inside the driven gear and the tooth groove width of the driving gear.

[0018] In order to realize the installation and guiding of the driven gear, the inner end surface of the front cover plate is provided with a first groove coaxially arranged with the driven gear, and the end surface of the shell facing the front cover plate is provided with a third groove coaxially arranged with the driven gear; the two sides of the driven gear are respectively provided with a first protrusion and a second protrusion coaxially arranged, the first protrusion is movably connected in the first groove, and the second protrusion is movably connected in the third groove.

[0019] In order to reduce the friction between the driven gear and the front cover plate during rotation, the height of the first protrusion is greater than the depth of the first groove, and the height of the second protrusion is greater than the depth of the third groove.

[0020] In order to enable the insertion rod to be quickly inserted into the overlapping portion, the vertical distance between the end of the insertion rod close to the driving gear and the driving gear is smaller than the height of the second protrusion.

[0021] In order to realize the installation and guiding of the rack-type drive rod, the inner end face of the front cover plate is also provided with a linear second groove, and the end face of the shell facing the front cover plate is provided with a limiting groove corresponding to the second groove, the rack-type drive rod is slidably connected to the limiting groove, and the side edge of the rack-type drive rod extends into the second groove and is slidably connected to the second groove.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The invention provides a nuclear reactor driving mechanism, which arranges an electromagnet and a spring between a motor and a latch pin, and connects the electromagnet to a power source, so that a plug rod is inserted into the overlapping portion of the internal tooth groove width of a driven gear and the tooth groove width of a driving gear, and the driven gear is driven to rotate by the driving gear, so as to drive a rack-type driving rod meshing with the outside of the driven gear to move; that is, through the gear and rack transmission method, the rack-type driving rod moves more smoothly, and through the cooperation of internal and external gears, the rack-type driving rod moves when it is powered on and falls off when it is powered off, and the motor self-locks to make the rack-type driving rod stay at any position, thereby improving the stability and smoothness of the rack-type driving rod during movement and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 A cross-sectional view of a nuclear reactor drive mechanism according to an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a longitudinal section of a nuclear reactor drive mechanism according to an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the three-dimensional structure inside a housing of an embodiment provided by the present invention;

[0028] Figure 4 An enlarged three-dimensional structural schematic diagram of a latch according to an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the three-dimensional structure of a front cover plate according to an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the three-dimensional structure of a housing according to an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of the three-dimensional structure of a rear cover plate according to an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of a three-dimensional structure of a gear combination according to an embodiment of the present invention.

[0033] Marks and corresponding parts names in the attached drawings:

[0034] 1-front cover, 2-rear cover, 3-housing, 4-connecting rod, 5-latch, 6-motor, 7-electromagnet, 8-spring, 9-driving gear, 10-driven gear, 11-rack-type driving rod, 12-cross arm, 13-insertion rod, 14-first groove, 15-second groove, 16-first protrusion, 17-second protrusion, 18-third groove, 19-limiting groove. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0036] Embodiment 1:

[0037] refer to Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8As shown, this embodiment 1 provides a nuclear reactor driving mechanism, including a front cover plate 1 and a rear cover plate 2, a shell 3 is arranged between the front cover plate 1 and the rear cover plate 2, the front cover plate 1 and the rear cover plate 2 are fixedly mounted on both sides of the shell 3 by bolt connection, the interior of the shell 3 is a hollow cylindrical through hole, a connecting rod 4 is arranged on the inner wall of the rear cover plate 2, and is placed in the shell 3 and located on the central axis of the cylindrical through hole inside the shell 3, the connecting rod 4 is made of non-magnetic material, the connecting rod 4 can be fixedly mounted on the middle part of the inner wall of the rear cover plate 2 by threaded connection, and the connecting rod 4 and the rear cover plate 2 are perpendicular to each other, and a plug 5 is sleeved on the connecting rod 4, and the plug 5 and the rear cover plate 2 are spaced apart, and a motor 6 is arranged at the end of the connecting rod 4, and the end of the connecting rod 4 is fixed on the central axis of the top of the motor 6, and an electromagnet 7 is arranged between the motor 6 and the rear cover plate 2, and the electromagnet 7 is fixedly mounted on the side wall of the connecting rod 4 by bolts, and is spaced apart from the connecting rod 4, and is close to the top of the motor 6, so as to be convenient for connecting to the power supply respectively, and It is used to absorb the latch 5 through the electromagnet 7 so that the latch 5 moves along the axial direction of the connecting rod 4. At the same time, a spring 8 is arranged between the electromagnet 7 and the latch 5. One end of the spring 8 is movably installed on the top of the latch 5, and the other end of the spring 8 is movably installed on the electromagnet 7. It is used to reset the latch 5 under the elastic force of the spring 8 when the electromagnet 7 is not energized. A driving gear 9 is arranged at the bottom of the motor 6. The driving gear 9 is fixedly installed at the bottom of the motor 6 and is fixedly connected to the motor shaft of the motor 6. The central axis of the driving gear 9 is consistent with the central axis of the motor 6. It is used to drive the driving gear 9 to rotate through the motor 6. At the same time, a driven gear 10 is arranged on the outer sleeve of the driving gear 9. There is a gap between the driven gear 10 and the driving gear 9, and the center of the circle between the driven gear 10 and the driving gear 9 is consistent, and the driven gear 10 and the driving gear 9 can rotate coaxially. A rack-type driving rod 11 is arranged between the front cover plate 1 and the housing 3, and is used to drive the rack-type driving rod 11 to move along the tangential direction of the driven gear 10 through the driven gear 10.

[0038] refer to Figure 1 As shown, as a possible implementation, the driven gear 10 is a hollow ring shape, the center of the driven gear 10 is located on the central axis of the connecting rod 4, the driven gear 10 includes inner gear teeth and outer gear teeth, and the driven gear 10 is meshed with the outer wheel of the rack-type drive rod 11, the driven gear 10 and the rack-type drive rod 11 are externally meshed, and are used to drive the rack-type drive rod 11 to move up and down through the clockwise or counterclockwise rotation of the driven gear 10, and at the same time, the driven gear 10 can be controlled or adjusted to be stationary, and the rack-type drive rod 11 can be controlled to be stationary or fixed at any position.

[0039] refer to Figure 1 , Figure 4As shown, as a possible implementation, the latch 5 includes a cross arm 12, the middle part of the cross arm 12 is a hollow ring, the cross arm 12 is sleeved on the connecting rod 4, and the inner diameter of the ring in the middle part of the cross arm 12 is slightly larger than the rod diameter of the connecting rod 4, which is used for the latch 5 to slide along the axis direction of the connecting rod 4, or rotate around the axis without shaking, and the cross arm 12 is provided with at least one group, and the number of groups of the cross arm 12 can be any number greater than one, and the specific number of groups can be specifically limited according to actual conditions, and the middle parts of multiple groups of cross arms 12 are all hollow rings. , and they are all the same central ring, multiple groups of cross arms 12 are all located in the same plane, and two parallel plug rods 13 are respectively arranged at both ends of the cross arm 12, the plug rods 13 and the cross arm 12 are perpendicular to each other, and the two plug rods 13 are symmetrical with the central axis of the cross arm 12, and the two plug rods 13 are spaced apart from the motor 6, the vertical distance between the two plug rods 13 is consistent with the root circle diameter of the driving gear 9, the two plug rods 13 are spaced apart from the driving gear 9, and the vertical distances from the two plug rods 13 to the central axis of the cross arm 12 are consistent.

[0040] refer to Figure 1 , Figure 5 As shown, as a possible implementation, a first groove 14 is provided in the middle of the inner wall of the front cover plate 1, the first groove 14 is a circular groove, and the center of the first groove 14 is consistent with the center of the driven gear 10, and a second groove 15 is provided on one side of the first groove 14 at intervals, the second groove 15 is placed on the rectangular surface of the inner wall of the front cover plate 1, the second groove 15 is a linear groove, the second groove 15 is consistent with the moving direction of the rack drive rod 11, the stability of the rack drive rod 11 during the movement is improved, and the rack drive rod 11 is meshed with the outside of the driven gear 10, so as to make the rack drive rod 11 move along the second groove 15 under the transmission action of the driven gear 10.

[0041] refer to Figure 1 , Figure 3 , Figure 6 , Figure 8As shown, as a possible implementation, in order to improve the stability of the rack-type driving rod 11 during the up and down movement, a first protrusion 16 is provided on the front wall of the driven gear 10, and a second protrusion 17 is provided on the rear wall of the driven gear 10. The first protrusion 16 corresponds to the first groove 14 and matches with each other, and is used to movably install the driven gear 10 in the first groove 14. At the same time, a third groove 18 is provided on the rear wall of the housing 3. The third groove 18 corresponds to the second protrusion 17 and matches with each other, and is used to install the driven gear 10 between the front cover plate 1 and the housing 3. The first protrusion 16 and the second protrusion 17 The centers of the circles of the driven gear 10 are consistent and coaxial with the center of the circle of the driven gear 10, and are used for the driven gear 10 to rotate between the housing 3 and the front cover 1, and the protrusion height of the first protrusion 16 is slightly greater than the groove depth of the first groove 14, and the protrusion height of the second protrusion 17 is slightly greater than the groove depth of the third groove 18, which is used to reduce the friction between the driven gear 10 and the front cover 1 during the rotation process, and at the same time reduce the friction between the driven gear 10 and the housing 3 during the rotation process, improve the smoothness and stability of the driven gear 10 during the rotation process, and improve the smoothness and stability of the rack-type drive rod 11 during the rising or falling process.

[0042] refer to Figure 1 , Figure 3 , Figure 8 As shown in the figure, as a possible implementation, the driven gear 10 is aligned with the driving gear 9 in the same center, the number of teeth of the driving gear 9 is aligned with the number of teeth inside the driven gear 10, the tooth top circle of the driving gear 9 is tangent to the tooth top circle inside the driven gear 10, and the tooth groove width of the driving gear 9 is aligned with the tooth groove width inside the driven gear 10, so that the driven gear 10 is still in a stationary state during the process of the motor 6 driving the driving gear 9 to rotate, and the tooth groove width inside the driven gear 10 is greater than the internal The tooth thickness is 200 mm, and the tooth width of the driving gear 9 is larger than its tooth thickness, so that when the driven gear 10 is in any position relative to the driving gear 9, the tooth width inside the driven gear 10 overlaps with the tooth width of the driving gear 9, and the insertion rod 13 with a pyramidal end is inserted into the overlapping part of the tooth width inside the driven gear 10 and the tooth width of the driving gear 9, so as to fix the driven gear 10 and the driving gear 9 to each other through the latch 5, and make the latch 5, the driving gear 9 and the driven gear 10 rotate coaxially.

[0043] refer to Figure 1 , Figure 5 , Figure 6As shown, as a possible implementation mode, the rear wall of the shell 3 is provided with openings at both ends, and the two openings are rectangular openings and are interconnected, so that the rack-type drive rod 11 can slide through the openings. At the same time, a limiting groove 19 is provided below the opening, and the limiting groove 19 is communicated with the opening, so that the rack-type drive rod 11 can pass through the opening and slide along the limiting groove 19. At the same time, a second groove 15 is provided on the inner wall of the front cover 1, and the second groove 15 corresponds to the limiting groove 19, so that the rack-type drive rod 11 can be fixed through the second groove 15 and the limiting groove 19, and the rack-type drive rod 11 can be limited, so that the rack-type drive rod 11 can slide along the second groove 15 and the limiting groove 19, thereby improving the sliding stability of the rack-type drive rod 11.

[0044] refer to Figure 1 , Figure 3 , Figure 4 , Figure 8 As shown in the figure, as a possible implementation mode, in order to increase the speed of the insertion of the plug 5 into the overlapping portion of the tooth groove width inside the driven gear 10 and the tooth groove width of the driving gear 9, the plug rod 13 is spaced above the driving gear 9, and the plug rod 13 is perpendicular to the driving gear 9, and the vertical distance from the end of the plug rod 13 to the driving gear 9 is less than the protrusion height of the second protrusion 17, which is used for the magnetic field force generated by the electromagnet 7 to the adsorption force of the cross arm 12 when the electromagnet 7 is connected to the power supply, so that the plug rod 13 installed at both ends of the cross arm 12 can be quickly inserted into the overlapped portion of the tooth groove width inside the driven gear 10 and the driving gear 9. The overlapping portion of the tooth groove width of the gear 9 improves efficiency. At the same time, at least two groups of electromagnets 7 are arranged. The number of electromagnets 7 can be any number of groups greater than two. In the present embodiment, the number of groups of electromagnets 7 is set to five. The five groups of electromagnets 7 are all fixed to the side wall of the connecting rod 4 with bolts and are close to the top of the motor 6. They are all used to connect to the power supply and are spaced apart from the connecting rod 4 with the same spacing. They are used to increase the adsorption force of the electromagnet 7 on the pin 5 after power is turned on, and to increase the rate at which the pin 5 is inserted into the overlapping portion of the tooth groove width inside the driven gear 10 and the tooth groove width of the driving gear 9.

[0045] Embodiment 2:

[0046] This embodiment 2 is further optimized on the basis of embodiment 1, and also provides a driving method for a nuclear reactor, using a nuclear reactor driving mechanism, step A, the driving gear 9 and the driven gear 10 are fixed, the electromagnet 7 is connected to the power supply, the plug 5 is axially close to the driving gear 9 along the connecting rod 4, and the end of the plug 13 is inserted into the overlapping part of the tooth groove width inside the driven gear 10 and the tooth groove width of the driving gear 9; step B, the rack-type driving rod 11 is raised, the motor 6 is connected to the power supply, and the driving gear 9 is rotated clockwise, and the driven gear 10 is driven. Rotate clockwise, and the rack drive rod 11 rises driven by the driven gear 10; step C, the rack drive rod 11 descends, adjusts the current direction of the connected motor 6, and makes the drive gear 9 rotate counterclockwise, and drives the driven gear 10 to rotate counterclockwise, and the rack drive rod 11 descends driven by the driven gear 10; step D, the rack drive rod 11 is fixed, and the power supply connected to the motor 6 is disconnected. At this time, the electromagnet 7 is still connected to the power supply. When the motor 6 is in a self-locking state, the drive gear 9 is stationary, and the rack drive rod 11 is stopped at an arbitrary position.

[0047] In actual use, in order to facilitate the adjustment and control of the stability and smoothness of the rack-type driving rod 11, in a static state, the electromagnet 7 is not connected to the power supply, and no magnetic field is generated, and the spring 8 is in the original length state, and the latch 5 is spaced apart from the driving gear 9. When the electromagnet 7 is connected to the power supply, the electromagnet 7 generates a magnetic field and exerts a downward adsorption force on the latch 5. At this time, the latch 5 moves along the axis direction of the connecting rod 4 close to the electromagnet 7, and at the same time, the spring 8 is subjected to the pressure of the latch 5. At this time, the spring 8 is in a compressed state and tends to restore its original length. The plug 13 arranged in the latch 5 The end is inserted into the overlapping part of the tooth width inside the driven gear 10 and the tooth width of the driving gear 9, so that the driven gear 10 and the driving gear 9 are linked. When the motor 6 is connected to the power supply, the driving gear 9 starts to rotate under the action of the motor 6. At this time, the driven gear 10 starts to rotate in the same direction as the driven gear 10 under the transmission of the driving gear 9. At the same time, the pin 5 also rotates with the driving gear 9. At the same time, the gear teeth arranged outside the driven gear 10 are engaged with the rack-type driving rod 11, and drive the rack-type driving rod 11 to move up and down. At the same time, the rack-type driving rod 11 can be controlled to rise or fall by adjusting the rotation direction of the motor 6.

[0048] When the power supply connected to the electromagnet 7 and the power supply connected to the motor 6 are disconnected at the same time, the spring 8 tends to restore its original length under the action of its own elastic force, and applies a thrust to the latch 5 away from the driving gear 9, so that the insertion rod 13 is pulled out from the overlapping part of the tooth groove width inside the driven gear 10 and the tooth groove width of the driving gear 9, and moves in the direction away from the electromagnet 7. The spring 8 restores its original length. At this time, the linkage relationship between the two gears is eliminated, and there is a gap between the driven gear 10 and the driving gear 9. At the same time, the driving gear 9 stops rotating, and the rack-type driving rod 11 moves downward under the action of its own gravity, and in the process of moving, it also drives the driven gear 10 meshing with it to rotate, and blocks the nuclear reaction, thereby ensuring the safety of the nuclear reaction.

[0049] When it is necessary to stop the rack drive rod 11 at any position, the motor 6 and the electromagnet 7 are connected to the power supply at the same time, and the end of the rod 13 is inserted into the overlapping part of the tooth width inside the driven gear 10 and the tooth width of the driving gear 9. The driving gear 9 rotates under the drive of the motor 6, and the driven gear 10 rotates under the transmission action of the driving gear 9, and the rotation directions of the driven gear 10 and the driving gear 9 are consistent. The latch 5 also rotates in the same direction as the driving gear 9, and the rack drive rod 11 rises or falls under the drive of the driven gear 10. When the power supply connected to the motor 6 is disconnected, the motor 6 stops running, and the self-locking of the motor 6 is used to make the rack drive rod 11 stay at any position, and the driving gear 9 stops rotating. The end of the rod 13 is still located at the overlapping part of the tooth width inside the driven gear 10 and the tooth width of the driving gear 9, and the driven gear 10 stops rotating. At this time, the rack drive rod 11 is stationary relative to the driven gear 10, and it is easy to adjust and control the position of the rack drive rod 11.

[0050] When there is a power outage or other factors that prevent normal power supply, no current will pass through the motor 6 and the electromagnet 7, and they will stop running. At the same time, the electromagnet 7 will not generate a magnetic field. The compressed spring 8 will restore its original length under the action of its own elastic force, and apply a thrust to the latch 5 away from the driving gear 9, and pull the plug 13 out of the overlapping part of the tooth groove width inside the driven gear 10 and the tooth groove width of the driving gear 9, so that the linkage relationship between the two gears is eliminated, and the driving gear 9 fixedly connected to the motor 6 stops rotating. At this time, the rack-type driving rod 11 falls vertically under the action of its own gravity, and at the same time drives the driven gear 10 meshing with it to rotate, and blocks the nuclear reaction, stops the nuclear reaction, and ensures the safety of the nuclear reaction.

[0051] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method 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 in the scope of protection of the present invention.

Claims

1. A nuclear reactor drive mechanism, characterized in that: Including drive components and control components; The driving assembly comprises a motor (6) and a driving gear (9) arranged at the output end of the motor (6); a driven gear (10) is coaxially sleeved outside the driving gear (9); a gap is left between the driving gear (9) and the driven gear (10); gears are provided on the inner and outer sides of the driven gear (10); a rack-type driving rod (11) is meshed on the outer side of the driven gear (10); The number of teeth of the driving gear (9) is the same as the number of teeth on the inner side of the driven gear (10), and the tooth gap width of the driving gear (9) and the tooth gap width on the inner side of the driven gear (10) are both greater than their respective tooth thicknesses; The control assembly comprises a latch (5) and a power unit, wherein the latch (5) is movably arranged on a side of the motor (6) away from the driving gear (9), and the latch (5) is provided with a plurality of plug rods (13) arranged circumferentially along the driving gear (9), wherein the plug rods (13) are parallel to the axis of the driving gear (9), and the ends of the plug rods (13) are directly opposite to the overlapping portion of the tooth groove width between the driving gear (9) and the driven gear (10); The power unit is used to drive the latch pin (5) to move towards or away from the driving gear (9) and to insert the insertion rod (13) into or out of the overlapping portion; when the insertion rod (13) is inserted into the overlapping portion, it is used to drive the driving gear (9) and the driven gear (10) to rotate synchronously; It also comprises a housing (3) with a through hole, wherein the two ends of the housing (3) are respectively provided with a front cover plate (1) and a rear cover plate (2) for closing the ends of the through hole; the drive assembly and the control assembly are both located in the through hole; the motor (6) is also provided with a connecting rod (4) on the side away from the drive gear (9), and the two ends of the connecting rod (4) are respectively fixedly connected to the motor (6) and the rear cover plate (2); and the two ends of the rack-type drive rod (11) are both extended out of the housing (3); The latch (5) further comprises a cross arm (12), the connecting rod (4) and the driving gear (9) are coaxially arranged, the middle of the cross arm (12) is provided with a round hole for sleeve-arranging the connecting rod (4), and the cross arm (12) and the connecting rod (4) are movably connected: the cross arm (12) can slide along the length direction of the connecting rod (4) and can rotate around the axis of the connecting rod (4); a plurality of the insertion rods (13) are arranged at the end of the cross arm (12); The power unit is used to drive the cross arm (12) to slide along the length direction of the connecting rod (4); The latch pin (5) has a plurality of cross arms (12) in the same plane, and the plurality of cross arms (12) all share a circular hole; a plug rod (13) is vertically provided at the end of each cross arm (12); the plug rods (13) at both ends of any cross arm (12) are symmetrical along the axis of the connecting rod (4), and the vertical distance between the plug rods (13) at both ends of any cross arm (12) is the same as the root diameter of the drive gear (9).

2. A nuclear reactor driving mechanism according to claim 1, characterized in that: The power unit comprises an electromagnet (7), which is arranged on a side of the motor (6) away from the driving gear (9) and has a gap between the electromagnet (7) and the connecting rod (4); the electromagnet (7) is used to absorb the latch (5) and slide along the length direction of the connecting rod (4); the connecting rod (4) is made of non-magnetic material; and a spring (8) is provided between the electromagnet (7) and the cross arm (12).

3. A nuclear reactor driving mechanism according to claim 1, characterized in that: A plurality of electromagnets (7) are evenly distributed in a circumferential direction along the connecting rod (4), a gap is left between the plurality of electromagnets (7) and the connecting rod (4), and the plurality of electromagnets (7) are all energized with the motor (6).

4. A nuclear reactor driving mechanism according to claim 1, characterized in that: The inner end surface of the front cover plate (1) is provided with a first groove (14) coaxially arranged with the driven gear (10), and the end surface of the housing (3) facing the front cover plate (1) is provided with a third groove (18) coaxially arranged with the driven gear (10); The driven gear (10) has a first protrusion (16) and a second protrusion (17) coaxially arranged in an annular direction on both sides, the first protrusion (16) being movably connected to the first groove (14), and the second protrusion (17) being movably connected to the third groove (18).

5. A nuclear reactor driving mechanism according to claim 4, characterized in that: The height of the first protrusion (16) is greater than the depth of the first groove (14), and the height of the second protrusion (17) is greater than the depth of the third groove (18).

6. A nuclear reactor driving mechanism according to claim 5, characterized in that: The vertical distance between the end of the insertion rod (13) close to the driving gear (9) and the driving gear (9) is smaller than the height of the second protrusion (17).

7. A nuclear reactor driving mechanism according to claim 1, characterized in that: The inner end surface of the front cover plate (1) is also provided with a linear second groove (15), and the end surface of the housing (3) facing the front cover plate (1) is provided with a limiting groove (19) corresponding to the second groove (15), the rack-type driving rod (11) is slidably connected to the limiting groove (19), and the side edge of the rack-type driving rod (11) extends into the second groove (15) and is slidably connected to the second groove (15).

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