CN109994224A - Ship reactor control rod drive mechanism - Google Patents
Ship reactor control rod drive mechanism Download PDFInfo
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- CN109994224A CN109994224A CN201910031311.7A CN201910031311A CN109994224A CN 109994224 A CN109994224 A CN 109994224A CN 201910031311 A CN201910031311 A CN 201910031311A CN 109994224 A CN109994224 A CN 109994224A
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- scram
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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
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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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- 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 ship reactor control rod drive mechanism, including pressure-resistant case member, auxiliary scram component, stick location probe component, hook component, drive-rod part and coil component；Pressure-resistant case member includes the end plug on top, the capsul of stick stroke casing and lower part, capsul is fixedly connected with pressure vessels top cover, collectively form pressure boundary, it is characterized in that, coil component is sleeved on the outside of pressure-resistant case member, it is made of 3 electromagnetic coils and magnetic yoke, 3 electromagnetic coils are respectively to promote coil from top to bottom, moving coil and fixed coil, hook component corresponds to coil component and is provided with core assembly, core assembly is respectively locking core assembly from top to bottom, promote core assembly, moving iron core component and secured core component, it promotes coil and provides electromagnetic field simultaneously for the locking core assembly of hook component and promotion core assembly.
Description
Technical field
The invention belongs to ship reactor fields, it is more particularly related to a kind of ship reactor control rod
Driving mechanism.
Background technique
Control rod drive mechanism (abbreviation CRDM) is that the movement of the important control system of reactor and safety system is held
Row mechanism, up and down motion, holding or scram by drive control rod assembly in reactor core active region, realize reactor starting,
Power control, normal or breakdown.
Currently, there are mainly three types of types for control rod drive mechanism used by power producer:
1) magnetic resistance motor type control rod drive mechanism；
2) rack-and-pinion type control rod drive mechanism；
3) electromagnetism promotes step jump type control rod drive mechanism.
Compared with other kinds of driving mechanism, electromagnetism promotion step jump type control rod drive mechanism is simple with structure, mentions
The advantages that lift is big, the service life is long, convenient for safeguarding and replacement, so commonly using electromagnetism in continental rise pressurized-water reactor nuclear power plant promotes step jump type control
Rod drive mechanism processed.Electromagnetism promotes step jump type control rod drive mechanism usually by pressure-resistant case member, coil component, driving bar portion
Part, hook component and stick location probe component composition, general structure are as follows: pressure-resistant case member is mounted on reactor pressure vessel top
Portion, inside are the primary Ioops coolants of the high temperature and pressure of sealing；Coil component is housed around pressure-resistant case member, by increase line
Circle, moving coil, fixed coil and yoke assembly composition；Hook component is mounted on inside pneumatic shell, is generated in electromagnetic coil
Armature is moved in magnetic field in sequence, armature makes mobile hook and fixed hook and drive-rod part table by push and pull system
The ring slot in face alternately engages, and promotion accordingly or underthrust drive-rod part and coupled control rod, disconnected in accident
When electric, each magnet spool loses electric current, and hook is deviate from from drive rod tooth socket, then drive rod and coupled control
Stick falls into reactor core active region under the effect of gravity.
But this mechanism cannot be directly used to ship reactor, because ship is in navigation, reactor is in shakes always
In pendulum state, CRDM cannot be always kept in a fixed state vertical state at this time, only rely on driving of the gravity as control rod insertion reactor core
Power has been unable to the movement of application solutions scram.When wide-angle tilt occurs for ship reactor, or even topples, gravity just becomes
The resistance that control rod is moved to reactor core active region, relying solely on gravity cannot achieve scram shutdown.And ship reactor simultaneously
When toppling and powering off, drive rod can be thrown away from reactor core active region, caused to introduce positive reactivity, not can guarantee nuclear safety.
In view of this, it is necessory to provide a kind of actuation is reliable, running precision is high, it is simple for structure, it can be achieved that
The ship reactor control rod drive mechanism of power control and reactor safety control under the various operating conditions of ship reactor.
Summary of the invention
Goal of the invention of the invention is: overcoming the deficiencies of the prior art and provide that a kind of actuation is reliable, running precision
It is high, simple for structure, it can be achieved that power control under the various operating conditions of ship reactor and the ship of reactor safety control are anti-
Answer heap control rod drive mechanism.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of ship reactor control rod drive mechanism, comprising:
Pressure-resistant case member, auxiliary scram component, stick location probe component, hook component, drive-rod part and coil component；The pressure resistance
Case member includes the capsul of the end plug on top, stick stroke casing and lower part, and capsul is fixedly connected with pressure vessels top cover, altogether
With pressure boundary is constituted, the coil component is sleeved on the outside of pressure-resistant case member, is made of 3 electromagnetic coils and magnetic yoke, 3
Electromagnetic coil is respectively to promote coil, moving coil and fixed coil, the hook component to correspond to coil component and set from top to bottom
It is equipped with core assembly, core assembly is respectively locking core assembly, promotes core assembly, moving iron core component and consolidate from top to bottom
Fixed core component, the core assembly being correspondingly arranged on the electromagnetic coil and magnetic yoke and hook component of coil component are formed from top to bottom
Latching electromagnet promotes electromagnet, Mobile electromagnetic iron and fixed electromagnet, promotes coil while being the locking iron core of hook component
Component and promotion core assembly provide electromagnetic field.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the auxiliary scram component includes magnetic
Pole, auxiliary scram spring and armature, the magnetic pole are fixed on the stick stroke cannula tip, armature by auxiliary scram spring with
Magnetic pole connection, armature can be free to slide above and below in stick stroke inside pipe casing, make under accident conditions the drive-rod part and with
Its connected control rod is inserted into reactor core.
Rank as a kind of improvement of ship reactor control rod drive mechanism of the present invention, in the auxiliary scram component
Drainage hole is provided on iron.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the drive-rod part is located at described
Pneumatic shell components interior, and passed through from the quill inner hole that the hook component is arranged, lower end passes through detachable fitting and control
Stick is connected, and moves up and down in the stick stroke casing.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the stick location probe component suit
On the stick stroke casing, by the step surface bearing on stick stroke casing, the stick location probe component includes inner sleeve, set
Search coil and superposed auxiliary scram coil on inner sleeve, the auxiliary scram coil are auxiliary scram component
Offer electromagnetic field assists scram coil to be powered so that assisting the magnetic pole and armature actuation in scram component, auxiliary scram spring pressure
Tight accumulation of energy assists scram coil blackout, and auxiliary scram spring flicks armature, pushes drive-rod part movement.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the locking core assembly includes closing
Magnetic pole, case spring, locking armature and the sub-component for being latched hook and connecting rod composition are locked, locking hook passes through pin shaft and locking
Magnetic pole, connecting rod and locking armature connection, locking hook and locking armature are hung on locking magnetic pole, and locking armature can be along casing
Axis slides up and down, and is latched the closure and opening that locking hook is corresponded in armature sliding process, and case spring setting is held in the mouth in locking
It between iron and promotion magnetic pole and is set on quill, locking hook is closed when promoting coil blackout, is powered promoting coil
When open.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the upper end of described sleeve pipe axis and locking
Magnetic pole is connected through a screw thread, and is hung on the shoulder of pneumatic shell by being latched magnetic pole, and is compressed and fixed, institute by stick stroke casing
It states and promotes magnetic pole, fixed magnetic pole is each attached on quill.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, it has been evenly arranged on the drive rod
Ring slot can be engaged with locking hook, mobile hook and the fixed hook in hook component.
As a kind of improvement of ship reactor control rod drive mechanism of the present invention, the bottom of the pressure resistance case member is logical
Threaded connection detachable is crossed to be sealingly mounted on top cover of reactor pressure vessel.
Compared with the existing technology, ship reactor of the present invention has following advantageous effects with control rod drive mechanism:
1) by setting locking hook, it can prevent control rod from arbitrarily moving in reactor core active region, prevented also from accident feelings
Under condition, control rod is thrown away from reactor core active region after ship power-off and turn, and reactor core active region is caused to introduce positive reactivity；
2) electromagnetic field can be provided simultaneously for hook component locking core assembly and promotion core assembly by promoting coil, and be led to
The design of locking armature working clearance and mobile magnetic pole working clearance, and the design of different spring rates are crossed, makes to be latched armature
Action moment than the action moment of mobile magnetic pole be it is early, completion locking system is set under the premise of not increasing number of coils
Meter；
3) it is provided with auxiliary scram component, drive rod can be helped in the case where losing power supply or ship inclination and turn
Component and coupled control rod quick insertion reactor core；
4) it assists being provided with drainage hole on the armature in scram component, water resistance when armature is opened can be reduced, raising is fallen
Rod speed.
Detailed description of the invention
With reference to the accompanying drawings and detailed description, ship reactor of the present invention is carried out in detail with control rod drive mechanism
Explanation, in which:
Fig. 1 is the structural schematic diagram of ship reactor control rod drive mechanism of the present invention.
Fig. 2 is the curve that ship reactor of the present invention promotes that coil exciting current is changed over time with control rod drive mechanism
Figure.
Appended drawing reference:
1- pressure resistance case member；2- assists scram component；3- stick location probe component；4- drive-rod part；5- hook component；
6- coil component；7- assists scram coil；8- is latched magnetic pole；9- is latched hook；10- is latched armature；11- promotes coil；12- is mentioned
Rise magnetic pole；13- moves magnetic pole；14- moving coil；15- moves armature；16- moves hook；17- fixed coil；18- fixes magnetic
Pole；19- fixed armature；20- fixes hook；21- quill；22- magnetic yoke.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its technical effect, below in conjunction with attached drawing and tool
Body embodiment, the present invention will be described in further detail.It should be understood that specific embodiment party described in this specification
Formula is not intended to limit the present invention just for the sake of explaining the present invention.
Refering to Figure 1, ship reactor control rod drive mechanism of the present invention, comprising: pressure-resistant case member 1, auxiliary
Scram component 2, stick location probe component 3, hook component 5, drive-rod part 4 and coil component 6；Pressure-resistant case member 1 includes upper
The capsul of the end plug in portion, stick stroke casing and lower part, capsul are fixedly connected with pressure vessels top cover, collectively form pressure side
Boundary, coil component 6 are sleeved on the outside of pressure-resistant case member 1, are made of 3 electromagnetic coils 11,14,17 and magnetic yoke 22,3 electromagnetism
Coil is respectively to promote coil 11, moving coil 14 and fixed coil 17 from top to bottom, and the corresponding coil component 6 of hook component 5 is set
It is equipped with core assembly, core assembly is respectively locking core assembly, promotes core assembly, moving iron core component and consolidate from top to bottom
The core assembly being correspondingly arranged on fixed core component, the electromagnetic coil 11,14,17 and magnetic yoke 22 of coil component 6 and hook component 5
Latching electromagnet is formed from top to bottom, promotes electromagnet, Mobile electromagnetic iron and fixed electromagnet, and promoting coil 11 can be simultaneously
The locking core assembly and promotion core assembly of hook component 5 provide electromagnetic field.
Pressure-resistant case member 1 includes that the capsul of the end plug on top, stick stroke casing (figure is unlabeled) and lower part (schemes not mark
Number), the bottom of capsul is connected through a screw thread removable seal and is mounted on top cover of reactor pressure vessel, collectively forms pressure
Boundary.
Auxiliary scram component 2 is fixed on the stick stroke cannula tip of pressure-resistant case member 1, including magnetic pole, auxiliary scram spring
And armature, magnetic pole are fixed on stick stroke cannula tip, for armature by assisting scram spring to connect with magnetic pole, armature can be in stick stroke
Inside pipe casing is free to slide, and drive-rod part 4 and coupled control rod insertion reactor core are made under accident conditions.
Further, it is provided with drainage hole on armature, to reduce water resistance when armature is opened, improves scram speed.
Stick location probe component 3 is sleeved on stick stroke casing, by the step surface bearing on stick stroke casing, including inner sleeve
Cylinder (not shown go out) and the search coil being sleeved on inner sleeve (not shown go out) and assist scram coil 7, stick location probe portion
Part 3 is for detecting control rod in the physical location of reactor core, in total travel scram, when can be also used for the scram of measurement control rod
Between.The top of stick location probe component 3 is arranged in auxiliary scram coil 7, assists the structure of scram coil 7 and search coil and sets
It sets that mode is identical, is all wound on the skeleton of search coil, auxiliary scram coil 7 is that auxiliary scram component 2 provides electromagnetic field, auxiliary
It helps scram coil 7 to be powered so that magnetic pole and armature in scram component 2 is assisted to be attracted, assists the accumulation of energy of scram spring compression, auxiliary
The power-off of scram coil 7, auxiliary scram spring flick armature, drive-rod part 4 are pushed to move, can be in ship inclination and turn
In the case of help drive-rod part 4 and coupled control rod quick insertion reactor core.
Assist the working method of scram component 2 are as follows: the auxiliary scram coil 7 in stick location probe component 3 is operating normally
In the case of be powered always so that auxiliary scram component 2 in magnetic pole and armature be attracted, assist the accumulation of energy of scram spring compression.In thing
Under the conditions of therefore, auxiliary scram coil 7 is powered off, and auxiliary scram spring flicks armature, is pushed the movement of drive rod, can be inclined in ship
Tiltedly and in the case where turning over help drive rod and coupled control rod quick insertion reactor core.Assist the rank in scram component 2
It is provided with drainage hole on iron, to reduce water resistance when armature is opened, improves scram speed.
Drive-rod part 4 is located inside pressure-resistant case member 1, including (figure is not marked for drive rod (figure is unlabeled) and detachable fitting
Number) etc., 21 inner hole of quill that drive-rod part 4 is arranged from hook component 5 passes through, and lower end passes through detachable fitting and control rod
Component is connected, and moves up and down in stick stroke casing, realizes the promotion and underthrust of C&P systems.It is evenly arranged on drive rod
There is ring slot, ring slot can be engaged with locking hook 9, mobile hook 16 and the fixed hook 20 in hook component 5.
Hook component 5 is the Motor execution component of control rod drive mechanism, the shifting of locking hook 9, lower part including top
Dynamic hook 16 and fixed hook 20, locking hook 9 can prevent control rod from arbitrarily moving in reactor core active region when being closed, and can prevent
Control rod is thrown away from reactor core active region after only ship is powered off and turned over, and then prevents reactor core active region from entering positive reactivity, when
Drive rod, which needs to walk, quivers when making, and locking hook 9 is opened, and the mobile hook 16 in lower part and fixed 20 kinematic pair of hook are by orderly matching
It closes and realizes that the step jump of drive rod is promoted and underthrust movement.
It is packed into, hangs on the step on capsul top and is compressed by stick stroke casing, hook at the top of 5 self-sealing shell of hook component
5 lower end of tine is not fixed, and can vary with temperature free wxpansion.
The corresponding coil component 6 of hook component 5 is provided with core assembly, and core assembly is respectively locking iron core group from top to bottom
Part promotes core assembly, moving iron core component and secured core component, promotion coil 11,14 and of moving coil of coil component 6
Locking core assembly, the promotion core assembly, moving iron core group being correspondingly arranged in fixed coil 17 and magnetic yoke 22 and hook component
Part and secured core component form latching electromagnet from top to bottom, promote electromagnet, Mobile electromagnetic iron and fixed electromagnet, are promoted
Coil 11 can provide electromagnetic field simultaneously for the locking core assembly of hook component 5 and promotion core assembly, and moving coil 14 is
Mobile electromagnetic iron provides electromagnetic field, and fixed coil 17 provides electromagnetic field for fixed electromagnet.
Core assembly is latched including locking magnetic pole 8, antifreeze plate, case spring, locking armature 10 and locking hook 9 and is connected
The sub-component of bar composition, locking hook 9 are closed when promoting coil 11 and powering off, and are opened when promoting coil 11 and being powered；
Promoted core assembly include promoted magnetic pole 12, mobile 13 top of magnetic pole and buffer substrate tablet between the two, antifreeze plate and
Spring is promoted, mobile magnetic pole 13 when coil 11 is powered is promoted and is lifted up a step pitch from promotion coil 11 mobile magnetic pole when powering off
13 reset；
Moving iron core component include mobile 13 lower part of magnetic pole, antifreeze plate, mobile spring, mobile armature 15, buffer shaft and
The sub-component of mobile hook 16 and connecting rod composition, mobile hook 16 is closed when moving coil 14 is powered, when moving coil 14 powers off
Mobile hook 16 is opened；
Secured core component includes fixed magnetic pole 18, antifreeze plate, fixed spring, fixed armature 19, fixed hook support tube
And the sub-component of fixed hook 20 and connecting rod composition, fixed hook 20 is closed when fixed coil 17 is powered, and fixed coil 17 is disconnected
Fixed hook 20 is opened when electric.
In the shown embodiment, it promotes locking armature 10 in the top blocking core assembly of coil 11 and promotes magnetic
Gap between pole 12, corresponding promoted in lower part for promoting coil 11 are promoted in core assembly between magnetic pole 12 and mobile magnetic pole 13
Gap, therefore the promotion promotion coil more in the prior art of coil 11 is dimensionally longer, number of turns is more, promotes coil 11
Magnetic yoke size it is also bigger.
Hook component 5 is additionally provided with quill 21, and quill 21 is the support shaft of component, the upper end and locking 8 phase of magnetic pole
Even, and by being latched magnetic pole 8 it is fixed on capsul, lower end is threadedly coupled on stop nut, and inner hole is driving bar portion
Part 4 provides channel and guiding.
Locking core assembly, promotion core assembly, moving iron core component and secured core component are respectively assembled at quill
On 21, and provide bearing.
Specifically, 21 upper end of quill is connected through a screw thread with locking magnetic pole 8 and is locked with screw, is latched magnetic pole 8 resistance to
It is compressed on the step on pressure shell top and by stick stroke casing, 21 lower end of quill is the stop nut being threadedly coupled, stop nut
Radial positioning is provided, does not need axially to fix, the axial expansion space under different temperatures can be provided for hook component 5.Promote magnetic
Pole 12 and fixed magnetic pole 18 are also threadedly secured on quill 21 respectively, and are locked by screw.
Locking hook 9 is connect by three pin shafts with locking magnetic pole, connecting rod and locking armature 10, and locking hook 9, which is hung over, to be closed
It locks on magnetic pole 8, locking armature 10 is hung on locking magnetic pole 8 also by hook, and being latched armature 10 can be along on quill 21
Lower slider is latched the closure and opening that locking hook 9 is corresponded in 10 sliding process of armature, and case spring is in locking 10 He of armature
It is promoted between magnetic pole 12 and is covered on quill 21, spring force is provided.
It promotes electromagnet, Mobile electromagnetic iron, the structure of fixed electromagnet and working principle and existing electromagnetism promotes step jump type
Control rod drive mechanism is identical, it may be assumed that when 14/ fixed coil 17 of moving coil is powered, moving iron core component/secured core component
It is magnetized, the mobile fixed hook 20 of hook 16/ is closed；When the power-off of 14/ fixed coil 17 of moving coil, magnetic field disappears, mobile
The fixed hook 20 of hook 16/ is opened；It when promoting the energization of coil 11, promotes core assembly and is magnetized, mobile hook 16 promotes one
Step；When promoting the power-off of coil 11, magnetic field disappears, and mobile hook 16 resets.
Coil component 6 is sleeved on the lower part of pneumatic shell, is made of 3 electromagnetic coils 11,14,17 and magnetic yoke 22.3 electromagnetism
Coil 11,14,17 is respectively to promote coil 11, moving coil 14 and fixed coil 17, the electromagnetic wire of coil component 6 from top to bottom
Circle 11,14,17 and the core assembly corresponding with hook component 5 of magnetic yoke 22 constitute 4 electromagnet, are locking respectively from top to bottom
Electromagnet promotes electromagnet, Mobile electromagnetic iron and fixed electromagnet.Promote the locking that coil 11 can be hook component 5 simultaneously
Core assembly and promotion core assembly provide electromagnetic field, compared with existing electromagnetism promotes step jump type control rod drive mechanism, are promoted
The length of coil 11 is longer, so as to provide magnetic field simultaneously for latching electromagnet and promotion electromagnet.By being latched armature 10
The design of working clearance and mobile 13 working clearance of magnetic pole, and the design of different spring rates make to be promoted when coil 11 is powered and close
It is early at the time of promoting a step than mobile hook 16 at the time of latch hook pawl 9 is opened.
Promoting coil 11, moving coil 14, fixed coil 17 is 3 mutually independent high temperature resistants, radiotolerant electromagnetic wire
Circle, structure are identical and all coaxial with capsul.Coil component 6 promotes coil 11, moving coil 14, the phase between fixed coil 17
Position is positioned and fixed by magnetic yoke 22.The magnetic yoke component of each coil is made of upper and lower semi-body, between upper lower semi-body
It is connected and fixed by long bolt, when assembly successively lifts from bottom to top.It is put into fixed coil magnetic yoke lower semi-body first solid
Alignment circle 17, then lift fixed coil magnetic yoke upper semi-body (and moving coil magnetic yoke lower semi-body), with long bolt by two after installing
A magnetic yoke halfbody, which is connected, to be tightened；Then by moving coil 14 be packed into magnetic yoke, then lift moving coil magnetic yoke upper semi-body (and promoted
Coil magnetic yoke lower semi-body), two magnetic yoke halfbodies are connected with long bolt after installing and are tightened；Coil 11 will finally be promoted and be packed into magnetic
Yoke, then lift and promote coil magnetic yoke upper semi-body, two magnetic yoke halfbodies are connected with long bolt after installing and are tightened；Promoting coil magnetic
Fairlead (not shown out) is installed by screw thread at the top of yoke upper semi-body, the lead wire of electromagnetic coil leads to driving by fairlead
At the top of mechanism.Electric connector (not shown go out) is installed, by the stick control of the lead wire of electromagnetic coil and heap top at the top of fairlead
System cable connection, for powering to coil component, coil component is assembled and is completed.Magnetic yoke 22 is ferrimagnet, such as spheroidal graphite
Cast iron etc. provides flux path for electromagnetic coil.
The working clearance for being latched armature 10 is smaller, and the rigidity of case spring is smaller, and the load for being latched armature 10 is smaller, because
This locking armature 10 is attracted that required electromagnetic force is smaller, when promoting the electric current in coil 11 and increasing, locking armature 10 first with
It promotes magnetic pole 12 to be attracted, is then latched the opening of hook 9.The working clearance of mobile magnetic pole 13 is larger (for drive rod step-length), promotes bullet
The rigidity of spring is larger, and the load of mobile magnetic pole 13 is larger, therefore to be attracted required electromagnetic force larger for mobile magnetic pole 13, works as locking
The electric current that hook 9 is promoted in coil 11 after opening continues growing, and mobile magnetic pole 13 is attracted with magnetic pole 12 is promoted, and mobile hook 16 mentions
A step is risen, is please referred to shown in Fig. 2.Locking hook 9 is closed when promoting coil 11 and powering off, and is opened when promoting coil 11 and being powered.
Under normal operating conditions, step jump lifting process is as follows:
(1) in the hold state, the power-off of coil 11, the power-off of moving coil 14, the energization of fixed coil 17 are promoted, hook is latched
9 closures, mobile hook 16 are opened, and fixed hook 20 is closed, and drive rod is supported on fixed hook 20.
(2) when needing to promote drive rod, moving coil 14 is powered, and mobile armature 15 is attracted to mobile magnetic pole 13, mobile
Hook 16 is closed；Fixed coil 17 powers off, and fixed armature 19 resets downwards, and fixed hook 20 is opened, drive rod and coupled
The load of control rod be passed on mobile hook 16；It promotes coil 11 to be powered, locking armature 10 is first inhaled to promotion magnetic pole 12
It closes, locking hook 9 is opened, and with continuing growing for 11 electric current of coil is promoted, mobile magnetic pole 13 is attracted to magnetic pole 12 is promoted, mobile
Hook 16 drives drive rod and coupled control rod to promote a step.
(3) fixed coil 17 is powered, and fixed armature 19 is attracted to fixed magnetic pole 18, and fixed hook 20 is closed；Moving coil
14 power-off, mobile armature 15 reset downwards, and mobile hook 16 is opened, and drive rod is supported on fixed hook；It is disconnected to promote coil 11
Electricity, mobile magnetic pole 13 are first opened, then move hook 16 and drop to home position, continue to reduce with promotion 11 electric current of coil,
Locking armature 10 resets upwards with the help of case spring, and locking hook 9 is closed.
It is promoted by the step that above step completes drive rod, it is to promote the reverse process of step sequence that underthrust, which walks sequence,.
In drive rod every time by movement after, promoted coil 11 power off, locking hook 9 be closed, engaged with drive rod, this is just
Prevent control rod arbitrarily to move in reactor core active region, be also prevented from the case of accident, ship power-off and turn over after control rod from
Reactor core is thrown away in active region, and reactor core active region is caused to introduce positive reactivity.After ship turn, it is latched the back of tooth and the drive of hook 9
Lever is self-locking.
It please refers to shown in Fig. 2, Fig. 2 is to promote 11 exciting current versus time curve figure of coil.It can be on curve
See that two steps, first step correspond to locking armature 10 and are attracted with promotion magnetic pole 12 downwards, second step corresponds to
Mobile magnetic pole 13 is elevated magnetic pole 12 together with mobile 16 groups of hook and is attracted.As seen from the figure, locking hook 9 open at the time of than
To be early at the time of mobile hook 16 promotes a step, this is realized by the design in structure, that is, is latched the workplace of armature 10
Gap is smaller than the working clearance for promoting magnetic pole 12, and these electromagnet all have the spring of different-stiffness.
Under normal operating conditions, moving coil 14 and the power-off of fixed coil 17, promotion coil 11 are powered, so that it may so that institute
There is hook all to open, quick scram is realized in control rod quick insertion reactor core active region under gravity.In accident conditions
Under, if driving mechanism loses whole power supplies, mobile hook 16 and fixed hook 20 can be automatically opened, and are latched hook 9 and are in and close
Lock status, the addendum flank of locking hook 9 is designed to cannot be self-locking with drive rod tooth socket, and drive rod remains under the effect of gravity at this time
Scram, but locking hook 9 can hinder the whereabouts of drive rod, increase rod drop time.In addition, if ship is tilted or turned over,
Gravity cannot make the normal scram of drive rod at this time.Therefore, Design assistant scram component 2 is needed.
Compared with the existing technology, ship reactor of the present invention has following advantageous effects with control rod drive mechanism:
1) by setting locking hook 9, it can prevent control rod from arbitrarily moving in reactor core active region, prevented also from accident feelings
Under condition, control rod is thrown away from reactor core active region after ship power-off and turn, and reactor core active region is caused to introduce positive reactivity；
2) electromagnetic field can be provided simultaneously for the locking core assembly of hook component 5 and promotion core assembly by promoting coil 11,
And by the design of locking 10 working clearance of armature and mobile 13 working clearance of magnetic pole, and the design of different spring rates, make to close
Lock armature 10 action moment than the action moment of mobile magnetic pole 13 be it is early, complete to close under the premise of not increasing number of coils
The design of lock system；
3) it is provided with auxiliary scram component 2, can help to drive in the case where losing power supply or ship inclination and turn
Rod unit 4 and coupled control rod quick insertion reactor core；
4) it assists being provided with drainage hole on the armature in scram component 2, water resistance when armature is opened can be reduced, raising is fallen
Rod speed.
According to above-mentioned principle, the present invention can also be made appropriate changes and modifications to the above embodiments.Therefore, this hair
It is bright to be not limited to specific embodiment disclosed and described above, some modifications and changes of the invention should also be as to fall into this
In the scope of protection of the claims of invention.In addition, although being used some specific terms in this specification, these terms
Merely for convenience of description, it does not limit the present invention in any way.
Claims (9)
1. a kind of ship reactor control rod drive mechanism, comprising: pressure-resistant case member, auxiliary scram component, stick location probe
Component, hook component, drive-rod part and coil component；It is described pressure resistance case member include the end plug on top, stick stroke casing and
The capsul of lower part, capsul are fixedly connected with pressure vessels top cover, collectively form pressure boundary, which is characterized in that the line
Coil component is sleeved on the outside of pressure-resistant case member, is made of 3 electromagnetic coils and magnetic yoke, and 3 electromagnetic coils are distinguished from top to bottom
It corresponds to coil component to promote coil, moving coil and fixed coil, the hook component and is provided with core assembly, core assembly
From top to bottom it is respectively locking core assembly, promotes core assembly, moving iron core component and secured core component, coil component
The core assembly being correspondingly arranged in electromagnetic coil and magnetic yoke and hook component forms latching electromagnet from top to bottom, promotes electromagnetism
Iron, Mobile electromagnetic iron and fixed electromagnet promote coil while being the locking core assembly and promotion core assembly of hook component
Electromagnetic field is provided.
2. ship reactor control rod drive mechanism according to claim 1, which is characterized in that the auxiliary scram portion
Part includes magnetic pole, auxiliary scram spring and armature, and the magnetic pole is fixed on the stick stroke cannula tip, and armature is fallen by auxiliary
Stick spring is connect with magnetic pole, and armature can be free to slide above and below in stick stroke inside pipe casing, and the drive rod is made under accident conditions
Component and coupled control rod are inserted into reactor core.
3. ship reactor control rod drive mechanism according to claim 2, which is characterized in that the auxiliary scram portion
Drainage hole is provided on armature in part.
4. ship reactor control rod drive mechanism according to claim 1, which is characterized in that the drive-rod part
It is passed through positioned at the pneumatic shell components interior, and from the quill inner hole that the hook component is arranged, lower end passes through being disconnected
Head is connected with control rod, moves up and down in the stick stroke casing.
5. ship reactor control rod drive mechanism according to claim 4, which is characterized in that the stick location probe
Component is sleeved on the stick stroke casing, and by the step surface bearing on stick stroke casing, the stick location probe component includes
Inner sleeve, the search coil being sleeved on inner sleeve and superposed auxiliary scram coil, supplemented by the auxiliary scram coil
It helps scram component to provide electromagnetic field, assists scram coil to be powered so that magnetic pole and armature in scram component is assisted to be attracted, assist
Scram spring compression accumulation of energy assists scram coil blackout, and auxiliary scram spring flicks armature, pushes drive-rod part movement.
6. ship reactor control rod drive mechanism according to claim 5, which is characterized in that the locking iron core group
Part includes being latched magnetic pole, case spring, locking armature and the sub-component for being latched hook and connecting rod composition, and locking hook passes through pin
Axis is connect with locking magnetic pole, connecting rod and locking armature, and locking hook and locking armature are hung on locking magnetic pole, and locking armature can
It is slided up and down along quill, is latched the closure and opening for corresponding to locking hook in armature sliding process, case spring setting
It in locking armature and is promoted between magnetic pole and is set on quill, locking hook is closed when promoting coil blackout, is being promoted
Coil is opened when being powered.
7. ship reactor control rod drive mechanism according to claim 6, which is characterized in that described sleeve pipe axis it is upper
End is connected through a screw thread with locking magnetic pole, is hung on the shoulder of pneumatic shell by being latched magnetic pole, and compressed by stick stroke casing
And fixation, the promotion magnetic pole, fixed magnetic pole are each attached on quill.
8. ship reactor control rod drive mechanism according to claim 5, which is characterized in that on the drive rod
It is even to be disposed with ring slot, it can be engaged with locking hook, mobile hook and the fixed hook in hook component.
9. ship reactor control rod drive mechanism according to claim 1, which is characterized in that the pressure resistance case member
Bottom be connected through a screw thread removable seal and be mounted on top cover of reactor pressure vessel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910031311.7A CN109994224A (en) | 2019-01-11 | 2019-01-11 | Ship reactor control rod drive mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910031311.7A CN109994224A (en) | 2019-01-11 | 2019-01-11 | Ship reactor control rod drive mechanism |
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