CN106205748B - Reactor control rod driving mechanism - Google Patents
Reactor control rod driving mechanism Download PDFInfo
- Publication number
- CN106205748B CN106205748B CN201610774110.2A CN201610774110A CN106205748B CN 106205748 B CN106205748 B CN 106205748B CN 201610774110 A CN201610774110 A CN 201610774110A CN 106205748 B CN106205748 B CN 106205748B
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- Prior art keywords
- outer housing
- inner frame
- buffer shaft
- control rod
- slot
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
- G21C7/14—Mechanical drive arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of reactor control rod driving mechanisms, including sealing shell component, the stroke casing being fixedly connected with sealing shell component, the coil block being sleeved on sealing shell component, the hook component being arranged in pressure-resistant shell component, the sealing shell component includes capsul and tube socket, and the capsul is an integral structure with tube socket.In the present solution, capsul and tube socket setting are an integral structure, when eliminating control rod drive mechanism and being connected with pressure vessel, the welding of required capsul and tube socket.So, so that the manufacture of entire nuclear reactor and assembling total time are reduced, simultaneously, but also gained nuclear reactor reduces a core first-order weld compared to the prior art, the reduction of weld seam advantageously reduces the risk leaked, therefore Yi Shang structure also greatly reduces the workload of CRDM inservice inspections while control rod drive mechanism service life is increased.
Description
Technical field
The present invention relates to nuclear reactor component technical field, more particularly to a kind of reactor control rod driving mechanism.
Background technology
It moves ahead with the development of nuclear power, nuclear power power generation proportion is promoted, and nuclear power participates in the proportion increase of peak regulation.Compressed water reactor nuclear power
Station owner will be worked by adjusting stick, the modes such as boron being adjusted to carry out core power adjusting and then participation peak regulation, and control rod drive mechanism exists
Epochmaking effect is played in presurized water reactor power regulation.
Control rod drive mechanism of the service life more than 15,000,000 steps has been produced in the prior art, such as ML-B types（ACP1000）
Control rod drive mechanism, but to ML-B types（ACP1000）When control rod drive mechanism carries out life experiment performance verification, work as fortune
When row is to 15,120,000 step, because of buffer shaft fracture failure in hook component, driving mechanism end-of-life, the control rod of other models drives
In motivation structure, buffer shaft is also weak part, and the service life of buffer shaft directly restricts the service life of driving mechanism；Meanwhile
In existing control rod drive mechanism, due to needing that special cooling system is set to cool down coil block, this allows for existing control
Rod drive mechanism volume processed is larger, complicated, difficulties in installation and maintenance is high；Further, shell component is sealed as control rod
Pressure-resistant component in driving mechanism seals the manufacture of shell component, assembles the use that quality directly influences control rod drive mechanism
Service life.Therefore, further optimization is made to the structure of control rod drive mechanism, to further improve the service life of hook component,
It is existing nuclear equipment design and manufacturing field technical staff institute urgent problem to be solved.
The content of the invention
Make further optimization for the above-mentioned structure to control rod drive mechanism, to further improve the use of hook component
Service life is existing nuclear equipment design and manufacturing field technical staff institute urgent problem to be solved, and the present invention provides a kind of reactions
Heap control rod drive mechanism is optimized in this programme by the structure to control rod drive mechanism, can reach raising control rod
The technique effect of driving mechanism service life.
Reactor control rod driving mechanism provided by the invention is solved the problems, such as by following technical essential：Reactor controls
Rod drive mechanism, the stroke casing being fixedly connected including sealing shell component, with sealing shell component are sleeved on sealing shell component
Coil block, the hook component being arranged in pressure-resistant shell component, the sealing shell component include capsul and tube socket, the sealing
Shell is an integral structure with tube socket.
Specifically, in the prior art, the sealing shell component in control rod drive mechanism only includes capsul, i.e. tube socket is independent
In control rod drive mechanism, tube socket is welded in pressure vessel manufacturing on pressure vessel, therefore in control rod drive mechanism
In installation process, welding personnel needs to complete the welding of tube socket and capsul in erecting bed.Also, capsul in the prior art
From both tube sockets dissimilar metal that be usually material different.This is allowed for
One core first-order weld, the not only complex process when welding this weld seam, meanwhile, it is in-service that this road weld seam also considerably increases CRDM
Workload during inspection.
In the present solution, capsul and tube socket setting are an integral structure, eliminate control rod drive mechanism and hold with pressure
When device connects, the welding of required capsul and tube socket.So so that the manufacture and assembling of entire nuclear reactor subtract total time
It is few, meanwhile, but also gained nuclear reactor reduces a core first-order weld compared to the prior art, the reduction of weld seam is conducive to
The risk leaked is reduced, therefore Yi Shang structure also greatly reduces while control rod drive mechanism service life is increased
The workload of CRDM inservice inspections.
Further technical solution is：
As the specific implementation of hook component, the hook component includes buffer shaft and mobile armature, the buffering
Axis and mobile armature are tubular structure, and for the shape of the buffer shaft in ladder shaft-like, the endoporus of the mobile armature is step
Hole, the mobile armature are sheathed on the outside of buffer shaft, and the reducer of the reducer on the outside of buffer shaft and mobile armature endoporus
In face relation, when with mobile armature relative motion occurs for buffer shaft, two above reducer limits buffering after contacting with each other
The relative position of axis and both mobile armature, the reducer on the outside of the buffer shaft pass through with buffering smaller one end of shaft diameter
Circle or chamfering are connected, and the size of the rounding is between R0.6 ~ R5；The size of the chamfering between 2 × 45 ° ~ 4 ×
Between 45 °.
In hook component, one end of hook is connected by pin with buffer shaft, and the other end of hook is connected by pin-hinges
A connecting rod is connect, connecting rod is articulated and connected by pin and mobile armature.Mobile armature cooperates with buffer shaft, therefore hook is transported
Capable precision is ensured by the structure snd size integrality of both buffer shaft and mobile armature.When mobile armature is from outside
Magneticaction and when being separated with lift armature, mobile armature moves downward under the active force of gravity and spring, on the outside of buffer shaft
Reducer contacted with the reducer of mobile armature endoporus, to realize distance and radian by buffer shaft to mobile armature motion
It is positioned, and then controls and by connecting rod hook is driven to move to definite position during mobile armature movement, so that it is guaranteed that hook
The accuracy and validity of each step action, in above procedure, two above reducer impacts, more than to impact be buffer shaft
The main reason for failure.
After mounting, the lift armature in hook component is located at the top of mobile armature to this structure, and spring, which is located to be promoted, to be held in the mouth
Between iron and mobile armature, the reducer on mobile armature endoporus is located at the top of the reducer on the outside of buffer shaft, and buffer shaft is straight
The smaller one end in footpath is the upper end of buffer shaft, therefore when mobile armature moves downward, mobile armature is slided along the upper end of buffer shaft,
It is in contact in two reducers, achievees the purpose that limit mobile armature motion dead-centre position by buffer shaft.
In this structure, by be arranged to reducer on the outside of buffer shaft and buffering smaller one end of shaft diameter by rounding or
Chamfering is connected, and more than rounding or chamfering are for being reduced or eliminated when two reducers collide, the reducing on the outside of buffer shaft
Section and the stress concentration at the tie point of buffer shaft upper end, after stress concentration is reduced or eliminated, can effectively avoid buffer shaft office
Portion's premature rupture or fracture, the endoporus inordinate wear for avoiding buffer shaft；As those skilled in the art, the radius of more than rounding is got over
Big or chamfering size is bigger, and it is about apparent to offset the effect of de-stress concentration, but buffering shaft size of the prior art is certain,
It is bigger or in the case that chamfer dimesion is bigger in chamfering radius, necessarily so that effective contact area of two above reducer becomes
Small, however, when external force is constant, effective contact area reduces between the two, and unit area rate of depreciation increases, then makes what is mutually rubbed
Mobile armature and buffer shaft wearability reduce, and mobile armature and the radial and axial positioning failure of buffering shaft member, hook movement are accurate
Degree reduces, and severe patient will make control rod drive mechanism occur step-out in the process of running, skid even clipping stick phenomenon, and then influence
The shutdown function of the power regulation of reactor core even in emergency circumstances, therefore this case considers that buffer shaft coordinates with mobile armature
The effective area of the size of face area, i.e. above-described two reducers contact is further defined to the size of the rounding
Between R0.6 ~ R5；The size of the chamfering may be such that the speed of cooperation surface wear between 2 × 45 ° ~ 4 × 45 °
The collision frequency that can be born with buffer shaft matches, i.e., so that the structure design of buffer shaft is causing buffer shaft that can run step number
While increase, buffer shaft and the wearability of mobile armature mating surface also disclosure satisfy that buffer shaft can run the increase of step number.
As those skilled in the art, more than buffer shaft may be designed as the ladder shaft-like of two-part, i.e., on the outside of buffer shaft
Reducer is one, and the smaller one end of buffering shaft diameter is the form of the upper end of buffer shaft；Stepped hole on mobile armature is set
For three sections, in intermediate one section compared with other two sections of evaginations, in this way, obtaining two reducings on the stepped hole of mobile armature
Section, after mobile armature installation, supporting surface of the reducer in upside as spring thereon, the reducer conduct in downside
It is pointed for limiting mobile armature and the reducer of buffer shaft relative position in this case.
The coil block includes the inner frame and outer housing that are cylindrical in shape structure, shape between the outer housing and inner frame
Into for housing the ring cavity of coil windings, and inner frame is located in the endoporus of outer housing；
The inner frame and outer housing include material for the main part of metal and the cutout being arranged in main part
Slot, inside and outside wall surface and front and rear end of the cutout slot through inner frame on inner frame, the cutout slot on outer housing run through shell
The inside and outside wall surface of body and front and rear end.
In the present solution, inner frame and outer housing form for the main part of metal with the cutout slot being opened in main part
The tubular construction of inner frame and outer housing, the gap between inner frame and outer housing is for installing coil windings, in coil windings
During work, the cutout slot on inner frame and outer housing is used to cut off inner frame and outer housing on inner frame and outer housing, i.e.,
Cutout slot be opened on inner frame or outer housing, the slot for inner frame or outer housing to be blocked, to avoid inner frame and
Inductive loop is generated on outer housing.So, material is used to be substituted for the inner frame and outer housing of metal of the prior art
Macromolecule nonmetallic materials, so may be such that coil block to the tolerance of temperature considerably beyond 350 DEG C, in this way, metal material
Inner frame and outer housing not only service life is longer, coil block at work, need not use traditional air cooling system again
Coil block is cooled down, in this way, the control rod drive mechanism that this case provides can be set for the air-cooled of coil block cooling
System etc. not only reduces the structure of control rod drive mechanism, has saved equipment investment, simultaneously as cold fluid is not required
Heat is taken away, can also so improve the thermal efficiency of nuclear reactor.
Cutout slot on inner frame and outer housing is at least two, and the cutout slot on inner frame is uniformly distributed in in-seam
On frame, the cutout slot on outer housing is uniformly distributed on outer housing, and insulation connection strap is both provided in the cutout slot.This programme
In, to inner frame and outer housing each above quantity restriction of cutout slot, it is intended to so that magnetic field is more uniformly distributed produced by coil block,
The insulation connection strap set simultaneously is beneficial to inner frame and the respective shape of outer housing is kept.It is it is preferred that disconnected on inner frame and outer housing
Chute is uniformly distributed in the technical solution on inner frame or outer housing, may be such that the magnetic field generated during electromagnetic coil work by interior
Skeleton or outer housing are pierced by rear substantially uniformity, reach weakening or eliminate the generation rotation when being axially moved of CRDM internal motions part
Trend, so as to reach be alleviated or avoided eccentric wear, be alleviated or avoided local excessive abrasion etc. technique effects, reach improve CRDM fortune
The purpose of dynamic performance.
Due to fixing base of the inner frame as electromagnetic coil winding, installation and using when only need as one
Cylinder-shaped overall structure, as a kind of specific inner frame technical solution convenient for inner frame manufacture, on the inner frame
Insulation connection strap is embedding or is embedded in the insulation strip to stop on inner frame in slot；
Due to guard block of the outer housing as electromagnetic coil winding, it should refill and be assigned in after coil windings are installed
The outside of electromagnetic coil winding, as a kind of outer housing technical solution convenient for outer housing installation, each item breaks on the outer housing
It is both provided with card slot or card convex on the outer housing of chute both sides, the length direction of the card slot or card convex is each parallel to outer housing
Axial direction, card slot or card convex originate in the end of outer housing, and the insulation connection strap on the outer housing is connected with outer casing body
The insulation strip of card slot or card convex on upper same cutout slot both sides outer housing.In more than structure, by the strip that insulate to right
The constraint of card slot or card convex is answered, completes the combination of outer housing each several part, and after removing above-mentioned constraint, outer housing each several part phase point
From.
During so that coil windings work, completely eliminating magnetic field and radially generating asymmetric electromagnetism component, the in-seam
For the quantity of cutout slot in the quantity and outer housing of cutout slot on frame into multiple proportion, the numerical value of the multiple is positive integer.
It is non-uniform in each radial direction of electromagnetic coil winding by limiting above the quantity for the slot that stops on inner frame and outer housing
Electromagnetism component is cancelled out each other, and be can reach and is completely eliminated because electromagnetic coil generates the asymmetric eccentric wear introduced in magnetic field, local excessive
Happening for stress is generated in abrasion, anti-rotation block.
Generate the technical solution in substantially uniformity magnetic field as electromagnetic coil, the quantity of the cutout slot on the inner frame with it is outer
The quantity of cutout slot on housing is equal, and the cutout groove location on inner frame and outer housing corresponds, and the one-to-one corresponding is
The cutout slot on cutout slot and outer housing on the inner frame be located at electromagnetic coil skeleton structure it is same in the radial direction.
As the specific type of attachment of inner frame and outer housing, the both ends of the inner frame are both provided with annular in shape outer
Edge, the axis of the outer rim and the axis collinear of main part, the endoporus of outer rim are connected with inner frame end, the cutout on inner frame
Slot extends to the end of outer rim, and the outer diameter of the outer housing is not more than the outer diameter of outer rim, and outer housing is arranged between two outer rims,
And it is both provided with insulating layer between each outer rim and the end of corresponding outer housing；The ring cavity is enclosed construction.Above connection
In form, the relative position of inner frame and outer housing can fix well, keep good workability for a long time beneficial to electromagnetic coil
Can, the ring cavity is the setting of enclosed construction, can be intended to protect electromagnetic coil winding as far as possible.
As mobile armature endoporus reducer another kind concrete implementation form, the reducer of the mobile armature endoporus is straight
Chamfering is provided on the smaller one end in footpath, chamfering is provided on smaller one end of reducer diameter of the mobile armature endoporus,
The size of the chamfering is between 2.5 × 45 ° ~ 3.2 × 45 °.This realization method may be such that the operation step number of buffer shaft reaches
17000000 steps.
The sealing shell component way of realization high as a kind of structural strength, the capsul are using nickel-base alloy with tube socket
The tubular structure that material forging forms.As those skilled in the art, more than capsul can also use nickel-base alloy with tube socket
Material obtains one as whole tubular structure by way of 3D.
It is described as a kind of buffer shaft with good strength and with excellent abrasive resistance and mobile armature way of realization
The material of buffer shaft is any one in austenitic stainless steel, nickel-base alloy, cobalt-base alloys, and the material of the mobile armature is
Martensitic stain less steel.
For ease of indicating bar position, the stick position instruction component being set on sealing shell component is further included.As it is a kind of it is small,
Be easily installed stick position instruction component realization method, stick position instruction component be arranged to magnetostrictive displacement sensor, i.e., with combustion
Movable magnet ring of the permanent magnet as magnetostrictive displacement sensor is fixed on the drive rod free end that charge bar is connected, by mangneto
The measuring cell and signal processing module of telescopic displacement sensor are arranged on the outside of stroke casing.
The invention has the advantages that：
In the present solution, capsul and tube socket setting are an integral structure, eliminate control rod drive mechanism and hold with pressure
When device connects, the welding of required capsul and tube socket.So so that the manufacture and assembling of entire nuclear reactor subtract total time
It is few, meanwhile, but also gained nuclear reactor reduces a core first-order weld compared to the prior art, the reduction of weld seam is conducive to
The risk leaked is reduced, therefore Yi Shang structure also greatly reduces while control rod drive mechanism service life is increased
The workload of CRDM inservice inspections.
Description of the drawings
Fig. 1 is the structure diagram of one specific embodiment of reactor control rod driving mechanism of the present invention；
Fig. 2 is the structure of hook component in one specific embodiment of reactor control rod driving mechanism of the present invention
Schematic diagram；
Fig. 3 is the partial enlarged view of A portions shown in Fig. 2；
Fig. 4 is the structure of coil block in one specific embodiment of reactor control rod driving mechanism of the present invention
Sectional view；
Fig. 5 is shell in coil block in one specific embodiment of reactor control rod driving mechanism of the present invention
The structure diagram of body；
Fig. 6 is in-seam in coil block in one specific embodiment of reactor control rod driving mechanism of the present invention
The structure diagram of frame.
Number in figure is followed successively by：1st, stroke casing, 2, stick position instruction component, 3, sealing shell component, 4, coil block,
41st, inner frame, 42, outer housing, 43, coil windings, 44, embedding insulating layer, 45, cutout slot, 46, insulation strip, 47, insulating layer,
48th, insulate strip, and 5, hook component, 51, lift armature, 52, spring, 53, mobile armature, 54, hook, 55, connecting rod, 56, slow
Rush axis, 6, collet, 7, drive rod.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but the present invention structure be not limited only to it is following
Embodiment.
Embodiment 1：
As shown in Figures 1 to 6, reactor control rod driving mechanism is fixed including sealing shell component 3, with sealing shell component 3
The stroke casing 1 of connection, the coil block 4 being sleeved on sealing shell component 3, the hook component 5 being arranged in pressure-resistant shell component,
The sealing shell component 3 includes capsul and tube socket, and the capsul is an integral structure with tube socket.
Specifically, in the prior art, the sealing shell component 3 in control rod drive mechanism only includes capsul, i.e. tube socket is only
Control rod drive mechanism is stood on, tube socket is welded in pressure vessel manufacturing on pressure vessel, therefore in control rod driving machine
In structure installation process, welding personnel needs to complete the welding of tube socket and capsul in erecting bed.Also, it seals in the prior art
Both shell and tube socket are usually the different dissimilar metal of material.This is allowed at the tie point of capsul in the prior art and tube socket
For a core first-order weld, the not only complex process when welding this weld seam, simultaneously as have the presence of collet 6, the weldering of this road
Seam also considerably increases workload during CRDM inservice inspections.
In the present solution, capsul and tube socket setting are an integral structure, eliminate control rod drive mechanism and hold with pressure
When device connects, the welding of required capsul and tube socket.So so that the manufacture and assembling of entire nuclear reactor subtract total time
It is few, meanwhile, but also gained nuclear reactor reduces a core first-order weld compared to the prior art, the reduction of weld seam is conducive to
The risk leaked is reduced, therefore Yi Shang structure also greatly reduces while control rod drive mechanism service life is increased
The workload of CRDM inservice inspections.
Embodiment 2：
As shown in Figures 1 to 6, the present embodiment is further qualified on the basis of embodiment 1：As hook component 5
Specific implementation, the hook component 5 include buffer shaft 56 and mobile armature 53, and the buffer shaft 56 and mobile armature 53 are equal
For tubular structure, the shape of the buffer shaft 56 is in ladder shaft-like, and the endoporus of the mobile armature 53 is stepped hole, the movement
Armature 53 is sheathed on the outside of buffer shaft 56, and the reducer in 56 outside of buffer shaft and the reducer of 53 endoporus of mobile armature are in just
To relation, when with mobile armature 53 relative motion occurs for buffer shaft 56, two above reducer limits buffering after contacting with each other
The relative position of axis 56 and both mobile armature 53, the reducer and 56 diameter of buffer shaft smaller one in 56 outside of buffer shaft
End is connected by rounding or chamfering, and the size of the rounding is between R0.6 ~ R5；The size of the chamfering between 2 ×
Between 45 ° ~ 4 × 45 °.
In hook component 5, one end of hook 54 is connected by pin with buffer shaft 56, and the other end of hook 54 passes through pin
Be articulated and connected a connecting rod 56, and connecting rod 56 is articulated and connected by pin and mobile armature 53.Mobile armature 53 and 56 phase of buffer shaft
Mutually cooperation, therefore the precision that hook 54 is run is subject to by the structure snd size integrality of both buffer shaft 56 and mobile armature 53
Ensure.When mobile armature 53 separates from external magnetic force effect with lift armature 51, mobile armature 53 is in gravity and spring
It is moved downward under 52 active force, the reducer in 56 outside of buffer shaft is contacted with the reducer of mobile 53 endoporus of armature, to realize
Pass through when being positioned by buffer shaft 56 to the distance and radian of the mobile movement of armature 53, and then mobile armature 53 being controlled to act
Connecting rod 56 drives hook 54 to move to definite position, so that it is guaranteed that the accuracy and validity of the action of 54 each step of hook, with
During upper, two above reducer impacts, more than impact the main reason for being the failure of buffer shaft 56.
After mounting, the lift armature 51 in hook component 5 is located at the top of mobile armature 53 to this structure, and spring 52 is located at
Between lift armature 51 and mobile armature 53, the reducer on 53 endoporus of mobile armature is located at the reducer in 56 outside of buffer shaft
Top, the smaller one end of 56 diameter of buffer shaft are the upper end of buffer shaft 56, therefore when mobile armature 53 moves downward, mobile armature 53
It slides along the upper end of buffer shaft 56, is in contact in two reducers, reach and mobile rank is limited by buffer shaft 56
Iron 53 moves the purpose of dead-centre position.
In this structure, passed through with the smaller one end of 56 diameter of buffer shaft by the reducer for being arranged to 56 outside of buffer shaft
Circle or chamfering are connected, and more than rounding or chamfering are for being reduced or eliminated when two reducers collide, 56 outside of buffer shaft
Reducer and 56 upper end tie point of buffer shaft at stress concentration, after stress concentration is reduced or eliminated, can effectively avoid
The local premature rupture of buffer shaft 56 or fracture, the endoporus inordinate wear for avoiding buffer shaft 56；As those skilled in the art, more than
The radius of rounding is bigger or the size of chamfering is bigger, and it is about apparent but of the prior art slow to offset the effect of de-stress concentration
It is certain to rush 56 size of axis, it is in chamfering radius bigger or in the case that chamfer dimesion is bigger, necessarily so that two above reducer
Effective contact area becomes smaller, however, when external force is constant, effective contact area reduces between the two, and unit area rate of depreciation increases,
Then reduce the mobile armature 53 mutually to rub and 56 wearability of buffer shaft, mobile armature 53 and buffer shaft 56 are radial and axial
Positioning failure, hook 54 move accuracy, and severe patient will make control rod drive mechanism occur step-out in the process of running, beat
Sliding even clipping stick phenomenon, and then the shutdown function of the power regulation of reactor core even in emergency circumstances is influenced, therefore this case is examined
Consider the size of buffer shaft 56 and 53 mating surface area of mobile armature, i.e., the significant surface of above-described two reducers contact
Product, is further defined to the size of the rounding between R0.6 ~ R5；The size of the chamfering between 2 × 45 ° ~ 4 ×
Between 45 °, the collision frequency that may be such that the speed of cooperation surface wear can bear with buffer shaft 56 matches, i.e., so that buffer shaft
For 56 structure design while causing buffer shaft 56 that can run step number increase, buffer shaft 56 is resistance to mobile 53 mating surface of armature
Mill property also disclosure satisfy that buffer shaft 56 can run the increase of step number.The radius that more than R0.6 refers to rounding is 0.6 millimeter；More than 2
It is 45 ° that × 45 °, which refer to angle, and length is 2 millimeters of chamfering.Above to the structure qualification of hook component, buffer shaft may be such that
Operation step number reaches 16,000,000 steps.
As those skilled in the art, more than buffer shaft 56 may be designed as the ladder shaft-like of two-part, i.e., outside buffer shaft 56
The reducer of side is one, and the smaller one end of 56 diameter of buffer shaft is the form of the upper end of buffer shaft 56；On mobile armature 53
Stepped hole is arranged to three sections, in intermediate one section compared with other two sections of evaginations, in this way, on the stepped hole of mobile armature 53
Two reducers are obtained, after mobile armature 53 is installed, supporting surface of the reducer in upside as spring 52, is in thereon
The reducer of downside is as pointed for limiting mobile armature 53 and the reducer of 56 relative position of buffer shaft in this case.
As 53 endoporus reducer another kind concrete implementation form of mobile armature, the reducing of mobile 53 endoporus of armature
Section diameter is provided with chamfering on smaller one end, is provided on smaller one end of reducer diameter of mobile 53 endoporus of armature
Chamfering, the size of the chamfering is between 2.5 × 45 ° ~ 3.2 × 45 °.This realization method may be such that the operation of buffer shaft 56
Step number reaches 17,000,000 steps.
Sealing shell component 3 way of realization high as a kind of structural strength, the capsul are to use Ni-based conjunction with tube socket
The tubular structure that golden material forging forms.
As a kind of buffer shaft 56 with good strength and with excellent abrasive resistance with moving 53 way of realization of armature,
The material of the buffer shaft 56 is austenitic stainless steel, nickel-base alloy, any one in cobalt-base alloys, the mobile armature 53
Material be martensitic stain less steel.
For ease of indicating bar position, the stick position instruction component 2 being set on sealing shell component 3 is further included.As a kind of volume
Stick position instruction 2 realization method of component that is small, being easily installed, stick position instruction component 2 are arranged to magnetostrictive displacement sensor, that is, exist
Movable magnet ring of the permanent magnet as magnetostrictive displacement sensor is fixed on 7 free end of drive rod being connected with fuel rod,
The measuring cell of magnetostrictive displacement sensor and signal processing module are arranged on to the outside of stroke casing 1.
Embodiment 3：
It is further qualified on the basis of the technical solution that the present embodiment is provided in embodiment 1：As shown in Figures 1 to 6, institute
Stating coil block 4 includes being cylindrical in shape the inner frame 41 of structure and outer housing 42, shape between the outer housing 42 and inner frame 41
Into for housing the ring cavity of coil windings 43, and inner frame 41 is located in the endoporus of outer housing 42；
The inner frame 41 and outer housing 42 include material for the main part of metal and are arranged in main part
Stop slot 45, inside and outside wall surface and front and rear end of the cutout slot 45 on inner frame 41 through inner frame 41, on outer housing 42
Stop inside and outside wall surface and front and rear end of the slot 45 through outer housing 42.
In the present solution, inner frame 41 and the main part that outer housing 42 is metal and the cutout slot being opened in main part
The tubular construction of 45 composition inner frames 41 and outer housing 42, gap between inner frame 41 and outer housing 42 for install coil around
Group 43, when coil windings 43 work, the cutout slot 45 on inner frame 41 and outer housing 42 is used in inner frame 41 and outer housing
Inner frame 41 and outer housing 42 are cut off on 42, that is, the slot 45 that stops is to be opened on inner frame 41 or outer housing 42, for general
The slot that inner frame 41 or outer housing 42 block, to avoid inductive loop is generated on inner frame 41 and outer housing 42.So, adopt
Macromolecule nonmetallic materials of the prior art are substituted with the inner frame 41 and outer housing 42 that material is metal, so may be such that line
Coil assembly 4 to the tolerance of temperature considerably beyond 350 DEG C, in this way, the inner frame 41 and outer housing 42 of metal material are not used only
Longer life expectancy, coil block 4 at work, need not again cool down coil block 4 using traditional air cooling system, this
Sample, the control rod drive mechanism that this case provides can set air cooling system cooled down for coil block 4 etc., not only reduce control
The structure of rod drive mechanism, has saved equipment investment, simultaneously as cold fluid is not required to take away heat, can also so carry
The thermal efficiency of high nuclear reactor.
Cutout slot 45 on inner frame 41 and outer housing 42 is at least two, and the cutout slot 45 on inner frame 41 is uniform
It is distributed on inner frame 41, the cutout slot 45 on outer housing 42 is uniformly distributed on outer housing 42, is all provided in the cutout slot 45
It is equipped with insulation connection strap.In the present solution, to inner frame 41 and outer housing 42, each above the quantity of cutout slot 45 limits, it is intended to so that
Magnetic field produced by coil block 4 is more uniformly distributed, while the insulation connection strap set is beneficial to inner frame 41 and outer housing 42 is respective
Shape is kept.It is preferred that the cutout slot 45 on inner frame 41 and outer housing 42 is uniformly distributed on inner frame 41 or outer housing 42
Technical solution may be such that the magnetic field generated during electromagnetic coil work is pierced by rear substantially uniformity by inner frame 41 or outer housing 42, reach
To the trend for weakening or eliminating the generation rotation when being axially moved of CRDM internal motions part, it is alleviated or avoided partially so as to reach
It grinds, the technique effects such as local excessive abrasion is alleviated or avoided, achieve the purpose that improve CRDM movenent performances.
Due to fixing base of the inner frame 41 as electromagnetic coil winding 43, installation and using when only need as
One cylinder-shaped overall structure, it is described interior as a kind of specific 41 technical solution of inner frame manufactured convenient for inner frame 41
Insulation connection strap on skeleton 41 for embedding or is embedded in the insulation strip 46 to stop on inner frame 41 in slot 45；
Due to guard block of the outer housing 42 as electromagnetic coil winding 43, should after coil windings 43 are installed, then
The outside of electromagnetic coil winding 43 is assemblied in, it is described outer as a kind of 42 technical solution of outer housing installed convenient for outer housing 42
The length side of card slot or card convex, the card slot or card convex is both provided on housing 42 on the outer housing 42 of each 45 both sides of item cutout slot
To the axial direction each parallel to outer housing 42, card slot or card convex originate in the end of outer housing 42, on the outer housing 42
Insulation connection strap stop for same on connected with outer casing body 42 edge insulator of card slot or card convex on 45 both sides outer housing 42 of slot
Item 48.In more than structure, pass through constraint of the strip 48 to corresponding card slot or card convex of insulating, the group of completion 42 each several part of outer housing
It closes, and after removing above-mentioned constraint, the phase separation of 42 each several part of outer housing.
During so that coil windings 43 work, completely eliminating magnetic field and radially generating asymmetric electromagnetism component, it is described interior
The quantity of cutout slot 45 on quantity and the outer housing 42 of cutout slot 45 on skeleton 41 is into multiple proportion, the numerical value of the multiple
For positive integer.It is each in electromagnetic coil winding 43 by limiting above the quantity for the slot 45 that stops on inner frame 41 and outer housing 42
Radial direction, non-uniform electromagnetism component are cancelled out each other, and be can reach and are completely eliminated because electromagnetic coil generates magnetic field asymmetry and draws
The eccentric wear that enters, local excessive abrasion generate happening for stress on anti-rotation block.
As the technical solution in electromagnetic coil generation substantially uniformity magnetic field, the quantity of the slot 45 that stops on the inner frame 41
Equal with the quantity of the cutout slot 45 on outer housing 42,45 position of cutout slot on inner frame 41 and outer housing 42 corresponds,
Described correspond is located at electromagnetic coil skeleton knot for the cutout slot 45 on the cutout slot 45 and outer housing 42 on the inner frame 41
Structure it is same in the radial direction.
As the specific type of attachment of inner frame 41 and outer housing 42, the both ends of the inner frame 41 are both provided with annularly
Outer rim, the axis of the outer rim and the axis collinear of main part, the endoporus of outer rim be connected with 41 end of inner frame, inner frame 41
On cutout slot 45 extend to the end of outer rim, the outer diameter of the outer housing 42 is not more than the outer diameter of outer rim, and the card of outer housing 42 is set
Between two outer rims, and insulating layer 47 is both provided between each outer rim and the end of corresponding outer housing 42, the insulating layer 47
Mica material can be used；The ring cavity is enclosed construction.In more than type of attachment, inner frame 41 and outer housing 42 it is opposite
Position can be fixed well, keep good working performance for a long time beneficial to electromagnetic coil, and the ring cavity is enclosed construction
It sets, can be intended to protect electromagnetic coil winding 43 as far as possible.
Further, to promote the protective value to coil windings 43, set between coil windings 43 and outer housing 42
Embedding insulating layer 44, the embedding insulating layer 44 are to be obtained by insulated paint, quartz sand after vacuum pouring and by hot setting
Tubular structure.
The above content is combine specific preferred embodiment to the further description of the invention made, it is impossible to assert this
The specific embodiment of invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs,
The other embodiment drawn in the case where not departing from technical scheme, should be included within the scope of the present invention.
Claims (6)
1. reactor control rod driving mechanism, including sealing shell component（3）And sealing shell component（3）The stroke set being fixedly connected
Pipe（1）, be sleeved on sealing shell component（3）On coil block（4）, be arranged at pressure-resistant shell component（3）In hook component（5）,
It is characterized in that, the sealing shell component（3）Including capsul and tube socket, the capsul is an integral structure with tube socket；
The capsul is to forge the tubular structure formed using nickel-bass alloy material with tube socket；
It further includes and is set in sealing shell component（3）On stick position instruction component（2）；
The hook component includes buffer shaft（56）And mobile armature（53）, the buffer shaft（56）And mobile armature（53）It is
Tubular structure, the buffer shaft（56）Shape in ladder shaft-like, the mobile armature（53）Endoporus for stepped hole, the shifting
Moving armature（53）It is sheathed on buffer shaft（56）Outside, and buffer shaft（56）The reducer in outside and mobile armature（53）Endoporus
Reducer is in face relation, in buffer shaft（56）With mobile armature（53）During generation relative motion, two above reducer is mutual
Buffer shaft is limited after contact（56）With mobile armature（53）The relative position of the two, the buffer shaft（56）The reducer in outside with
Buffer shaft（56）The smaller one end of diameter is connected by rounding or chamfering, and the size of the rounding is between R0.6 ~ R5；
The size of the chamfering is between 2 × 45 ° ~ 4 × 45 °；
The buffer shaft（56）Material be austenitic stainless steel, nickel-base alloy, any one in cobalt-base alloys, the movement
Armature（53）Material be martensitic stain less steel.
2. reactor control rod driving mechanism according to claim 1, which is characterized in that the coil block（4）Including
It is cylindrical in shape the inner frame of structure（41）And outer housing（42）, the outer housing（42）With inner frame（41）Between formed for holding
Put coil windings（43）Ring cavity, and inner frame（41）Positioned at outer housing（42）Endoporus in；
The inner frame（41）And outer housing（42）Include material for the main part of metal and be arranged in main part
Stop slot（45）, inner frame（41）On cutout slot（45）Through inner frame（41）Inside and outside wall surface and front and rear end, shell
Body（42）On cutout slot（45）Through outer housing（42）Inside and outside wall surface and front and rear end.
3. reactor control rod driving mechanism according to claim 1, which is characterized in that inner frame（41）And outer housing
（42）On cutout slot（45）It is at least two, and inner frame（41）On cutout slot（45）It is uniformly distributed in inner frame（41）
On, outer housing（42）On cutout slot（45）It is uniformly distributed in outer housing（42）On, the cutout slot（45）In be both provided with absolutely
Edge connection strap.
4. reactor control rod driving mechanism according to claim 3, which is characterized in that the inner frame（41）On it is exhausted
Edge connection strap is embedding or is embedded in inner frame（41）Upper cutout slot（45）Interior insulation strip（46）；
The outer housing（32）Upper each item cutout slot（45）The outer housing of both sides（42）On be both provided with card slot or card convex, the card
Slot or the length direction of card convex are each parallel to outer housing（42）Axial direction, card slot or card convex originate in outer housing（42）'s
End, the outer housing（42）On insulation connection strap be connected with outer casing body（42）Upper same cutout slot（45）Both sides outer housing
（42）On card slot or card convex insulation strip（48）.
5. reactor control rod driving mechanism according to claim 2, which is characterized in that the inner frame（41）Both ends
It is both provided with outer rim annular in shape, the axis of the outer rim and the axis collinear of main part, the endoporus and inner frame of outer rim（41）
End is connected, inner frame（41）On cutout slot（45）Extend to the end of outer rim, the outer housing（42）Outer diameter be not more than
The outer diameter of outer rim, outer housing（42）It is arranged between two outer rims, and each outer rim and corresponding outer housing（42）End between
It is provided with insulating layer；The ring cavity is enclosed construction.
6. reactor control rod driving mechanism according to claim 1, which is characterized in that the mobile armature（53）Endoporus
The smaller one end of reducer diameter on be provided with chamfering, the size of the chamfering is between 2.5 × 45 ° ~ 3.2 × 45 °.
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| CN201610774110.2A CN106205748B (en) | 2016-08-31 | 2016-08-31 | Reactor control rod driving mechanism |
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| CN201610774110.2A CN106205748B (en) | 2016-08-31 | 2016-08-31 | Reactor control rod driving mechanism |
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| CN106205748B true CN106205748B (en) | 2018-05-18 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102568408B1 (en) * | 2016-12-30 | 2023-08-18 | 뉴스케일 파워, 엘엘씨 | control rod damping system |
| CN107767970A (en) * | 2017-10-20 | 2018-03-06 | 中国核动力研究设计院 | A kind of long-life high-temperature resistant magnetic force hoisting type reactor control rod driving mechanism |
| CN107665741B (en) * | 2017-11-01 | 2024-09-27 | 上海核工程研究设计院股份有限公司 | Control rod assembly holding and releasing structure for nuclear reactor |
| WO2019113927A1 (en) * | 2017-12-15 | 2019-06-20 | 中广核工程有限公司 | Nuclear power plant reactor control rod driving mechanism |
| CN108922637A (en) * | 2018-07-25 | 2018-11-30 | 中广核研究院有限公司 | A kind of nuclear power station-service control rod drive mechanism |
| CN112037940B (en) * | 2020-08-27 | 2024-02-06 | 清华大学 | Method for mounting drive line of built-in control rod in limited space |
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| CN101178946A (en) * | 2007-12-11 | 2008-05-14 | 中国核动力研究设计院 | Stepwise magnetic force hoisting type reactor control rod driving mechanism |
| CN102483962A (en) * | 2009-06-10 | 2012-05-30 | 巴布科克和威尔科克斯核作业集团股份有限公司 | Control rod drive mechanism for nuclear reactor |
| CN204178728U (en) * | 2014-11-19 | 2015-02-25 | 中广核工程有限公司 | Nuclear power station reactor control stick driving mechanism |
| CN104616706A (en) * | 2015-02-05 | 2015-05-13 | 喻杰 | Integrated pressure-resistant shell assembly |
| CN105788669A (en) * | 2016-05-06 | 2016-07-20 | 上海核工程研究设计院 | Built-in type control bar driving mechanism |
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| CN101178946A (en) * | 2007-12-11 | 2008-05-14 | 中国核动力研究设计院 | Stepwise magnetic force hoisting type reactor control rod driving mechanism |
| CN102483962A (en) * | 2009-06-10 | 2012-05-30 | 巴布科克和威尔科克斯核作业集团股份有限公司 | Control rod drive mechanism for nuclear reactor |
| CN204178728U (en) * | 2014-11-19 | 2015-02-25 | 中广核工程有限公司 | Nuclear power station reactor control stick driving mechanism |
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Inventor after: Yu Jie Inventor after: Li Hongying Inventor after: Zhu Qing Inventor after: Luo Ying Inventor after: Li Zewen Inventor after: Chen Xinan Inventor after: Liu Maofu Inventor after: Yu Tianda Inventor before: Yu Jie Inventor before: Zhu Qing Inventor before: Li Zewen Inventor before: Liu Maofu |
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Effective date of registration: 20170811 Address after: 610000 Sichuan City, Chengdu Province, the South Ring Road No. three, No. 28 Applicant after: Nuclear Power Institute of China Applicant after: Sichuan Huadu Nuclear Equipment Manufacture Co., Ltd. Address before: Dujiangyan City, Sichuan province 610000 Cheung Road, Chengdu city of Sichuan Dujiangyan Economic Development Zone No. 5 Applicant before: Sichuan Huadu Nuclear Equipment Manufacture Co., Ltd. |
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