CN108347129A - A kind of command bundle rods for nuclear reactors driving mechanism - Google Patents
A kind of command bundle rods for nuclear reactors driving mechanism Download PDFInfo
- Publication number
- CN108347129A CN108347129A CN201810244767.7A CN201810244767A CN108347129A CN 108347129 A CN108347129 A CN 108347129A CN 201810244767 A CN201810244767 A CN 201810244767A CN 108347129 A CN108347129 A CN 108347129A
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- China
- Prior art keywords
- idler wheel
- wall
- lead screw
- screw thread
- ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The present invention provides a kind of command bundle rods for nuclear reactors driving mechanisms, including cracking rotor, lead screw, multiple planetary roller components, position instruction device assembly, two bearings, motor housing, motor stator and spring assembly, the planetary roller component to include：Idler wheel inner ring, idler wheel outer ring, multiple rollers, two planet carriers and support shaft.Ring outer wall, idler wheel outer ring inner wall and roller are provided with the screw thread that helix angle is zero in idler wheel, and the screw thread on roller is identical as the thread pitch on ring outer wall in the idler wheel and idler wheel outer ring inner wall to realize engagement；Screw thread is provided on the outer ring outer wall of the idler wheel, the lead screw outer wall is provided with screw thread, and the screw thread on the outer ring outer wall of the idler wheel is engaged with the screw thread on the lead screw outer wall, and the lead screw setting is in the cracking hollow endoporus of rotor.Said mechanism can overcome the service life for increasing substantially control rod drive mechanism to five times or more, enhance reliability.
Description
Technical field
The invention belongs to core field of mechanical technique, in particular to a kind of command bundle rods for nuclear reactors driving mechanism.
Background technology
Control rod drive mechanism is the key equipment in nuclear reactor, can be according to the finger of reactor control and protection system
It enables, completes the startup of reactor, power regulation, keeps the functions such as power, normal shutdown and breakdown.Currently, pressing in the world
Generally using the control rod based on electromagnetic principle such as magnetic force hoisting type and cracking rotor magnetic resistance motor type in water type reactor
Driving mechanism.Cracking rotor magnetic resistance motor type control rod drive mechanism is chiefly used in the equipments such as ship platform.
Currently, ship platform command bundle rods for nuclear reactors driving mechanism generally all has the following problems：Short life, reliability
Low, problem influences the reliability of ship platform core heap present on.
Invention content
It is an object of the present invention to provide a kind of command bundle rods for nuclear reactors driving mechanism, technical solution is as follows：
A kind of command bundle rods for nuclear reactors driving mechanism, including：
Crack rotor, lead screw, multiple roll wheel assemblies, position instruction device assembly, two bearings, motor housing, motor stators
And spring assembly, wherein：
The roll wheel assembly includes：Idler wheel inner ring, idler wheel outer ring, multiple rollers, two planet carriers and support shaft；
The spring assembly includes being supported under support, spring, spring on spring；
The multiple roll wheel assembly is fixedly mounted in the rectangular baltimore groove of cracking rotor one end, and lead screw setting is opened in motor
It splits in rotor, multiple roll wheel assemblies are evenly arranged around lead screw, outside the idler wheel in screw thread and roll wheel assembly on lead screw outer wall
Screw thread engagement on ring outer wall；Cracking rotor is fixed on by two bearing supports in motor stator, and crack rotor and motor stator
Entirety is fixed in motor housing；Position instruction device assembly is axially fixed on motor housing for feeding back lead screw band dynamic load
The displaced position of lotus, spring is arranged on spring in spring assembly supported under support and spring between, supported on spring axial solid
Dingan County supports on motor housing, under spring to be connected with lead screw, compresses and upholds with the linear motion up and down of lead screw.
Preferably, ring outer wall is provided at both ends with optical axis step in the idler wheel, is provided between the optical axis step at both ends
The screw thread that helix angle is zero；Idler wheel outer ring inner wall is provided at both ends with optical axis step, is set between the optical axis step at both ends
It is equipped with the screw thread that helix angle is zero, the outer ring outer wall of the idler wheel is also equipped with screw thread, has helix angle or no spiral
Lift angle；The roller is provided at both ends with optical axis step, and the screw thread that helix angle is zero, institute are provided between the optical axis step at both ends
It is identical as the thread pitch on ring outer wall in the idler wheel and idler wheel outer ring inner wall to realize engagement to state the screw thread on roller；It is described
Planet carrier is circular ring shape, and excircle coordinates with the optical axis step on the inner wall of the idler wheel outer ring, inner periphery and the idler wheel inner ring
Optical axis step cooperation on outer wall, and it is evenly arranged with unthreaded hole；The idler wheel inner ring is nested in idler wheel outer ring, described two circles
Belt carrier is located at the annulus both ends that idler wheel inner ring is nested to form with idler wheel outer ring, the optical axis platform at the roller both ends
Rank is inserted into the unthreaded hole of the annulus planet carrier.
Preferably, described cracking rotor one end is evenly arranged at least four square grooves in circumferencial direction, described rectangular
Texturearunaperpendicular is in being both provided with supported hole on two symmetrical inner walls of cracking rotor axis, the roll wheel assembly setting is rectangular recessed
In slot, the support shaft passes through idler wheel inner ring, both ends to be inserted into supported hole.
Preferably, the profile in the form of thread section of the roller and the form of thread section on the outer ring outer wall of the idler wheel
It is convex arch profile, the range of two arc surface central diameter point tangent line angles is 30 degree to 150 degree.
Preferably, the two arc surfaces central diameter point tangent line angle is 90 degree.
Preferably, the form of thread cross section profile in the idler wheel on ring outer wall and idler wheel outer ring inner wall is triangle
Shape profile.
Preferably, the planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism further includes two steel wire gears
Circle, in the arc groove on the optical axis step of idler wheel outer ring both ends.
Preferably, the lead screw outer wall is provided with screw thread, be face directly triangle thread, concave surface circular arc triangular tooth screw thread or
Any one in trapezoidal thread, wherein the trapezoidal thread is by eliminating interference in tooth top and the correction of the flank shape of root interference position
Trapezoidal thread.
Preferably, the form of thread cross section profile on lead screw outer wall is concave surface arc profile, two arc surface central diameter point tangent lines
The range of angle is 30 degree to 150 degree, preferably 90 degree.
Command bundle rods for nuclear reactors driving mechanism provided by the invention can overcome cracking rotor magnetic resistance motor type control rod to drive
The fault of construction of motivation structure can increase substantially the service life of control rod drive mechanism to five times or more, enhance reliability.
Description of the drawings
Fig. 1 is the structural schematic diagram provided by the present invention for the planetary roller lead screw pair of nuclear power lifting device.
Fig. 2 is the X section schematic diagram of roll wheel assembly in Fig. 1.
The amplification signal that Fig. 3 is the form of thread site of engagement A in the form of thread and idler wheel of roller on ring outer wall in Fig. 2
Figure.
Fig. 4 is that the amplification of the screw thread and the form of thread site of engagement Y on lead screw outer wall on the outer ring outer wall of idler wheel in Fig. 1 is shown
It is intended to.
Fig. 5 is a kind of structural schematic diagram that command bundle rods for nuclear reactors driving mechanism is related to of the present invention；
In figure, reference numeral is as follows：
1- idler wheel inner rings；The first elastic springs of 2-；3- first planet carriers；4- idler wheels outer ring；5- rollers；The second planets of 6-
Frame；The second elastic springs of 7-；8- support shafts；9- cracking rotors；10- lead screws；11- position instruction device assemblies；12- first bearings；
13- motor housings；14- motor stators；15- second bearings；It is supported on 16- springs；17- springs；It is supported under 18- springs.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing.
Embodiment
As described in figures 1 and 5, nucleus power hoisting device of the present invention includes mainly multiple roll wheel assemblies (including in idler wheel
Circle 1；First elastic spring 2；First planet carrier 3；Idler wheel outer ring 4；Roller 5；Second planet carrier 6；Second elastic spring 7；Support
Axis 8；), cracking rotor 9, lead screw 10, position instruction device assembly 11；First bearing 12；Motor housing 13；Motor stator 14；Second
Bearing 15；16 are supported on spring；Spring 17；18 are supported under spring.
As shown in Fig. 2, 1 outer wall of idler wheel inner ring is provided at both ends with optical axis step, the optical axis step at both ends in roll wheel assembly
Between be provided with the screw thread that helix angle is zero.4 inner wall of idler wheel outer ring is provided at both ends with optical axis step, the optical axis step at both ends
Between be provided with the screw thread that helix angle is zero, 4 outer wall of idler wheel outer ring is also equipped with screw thread, can have and helix angle or not have
There is helix angle.All rollers 5 are provided at both ends with optical axis step, and it is zero to be provided with helix angle between the optical axis step at both ends
Screw thread, the screw thread on roller 5 is identical as the thread pitch on 4 inner wall of 1 outer wall of idler wheel inner ring and idler wheel outer ring to realize engagement.
As shown in Figures 2 to 4, the profile in the form of thread section on 4 outer wall of the form of thread section of roller 5 and idler wheel outer ring
It is convex arch profile.Form of thread cross section profile on 4 inner wall of 1 outer wall of idler wheel inner ring and idler wheel outer ring is triangle wheel
It is wide.
As shown in Fig. 2, first planet carrier 3 and the second planet carrier 6 are identical circular ring shape disc, excircle and idler wheel outer ring
Optical axis step cooperation on 4 inner walls, inner periphery coordinate with the optical axis step on 1 outer wall of idler wheel inner ring, on circular ring shape disc uniformly
It is provided with unthreaded hole.Idler wheel inner ring 1 is nested in idler wheel outer ring 4, and first planet carrier 3 and the second planet carrier 6 are located in idler wheel
The annulus both ends that circle 1 is nested to form with idler wheel outer ring 4, the optical axis step at 5 both ends of roller are inserted into 3 He of first planet carrier respectively
In unthreaded hole on second planet carrier 6, support shaft 8 is inserted into idler wheel inner ring 1.In addition, the first elastic spring 2 and the second elastic spring 7
In the arc groove on 4 both ends optical axis step of idler wheel outer ring.
As described in figures 1 and 5, multiple roll wheel assembly integral installations are in the square groove of 9 shaft end of cracking rotor, support shaft 8
It is arranged in the supported hole on rotor 9.Lead screw 10 is arranged in 9 hollow inner wall of rotor, and multiple roll wheel assemblies are around lead screw 10
Circumferencial direction is uniformly arranged, and the screw thread on 4 outer wall of idler wheel outer ring is engaged with the screw thread on 10 outer wall of lead screw, and lead screw 10 directly couples
Load.Position instruction device assembly 11 is axially fixed on motor housing 13, by sensor by displacement of the leading screw 10 with dynamic load
Position feedback is to control system.Cracking rotor 9 is fixedly mounted on by two bearings 12 and 15 in motor stator 13, in spring assembly
Spring 17 is arranged on spring under support 16 and spring between support 18, supports 16 to be axially installed in motor housing on spring
It supports 18 to be connected with lead screw 10 on 13, under spring, compresses and uphold with the up and down motion of lead screw.
The novel course of work of the present invention is as follows：
1, the startup of reactor：
When reactor start-up, electrical power, motor cracking rotor 9 is closed, the rotation in motor stator 14 of cracking rotor 9,
Roll wheel assembly is driven to be rotated around wire 10, on the screw thread and 10 outer wall of lead screw on 4 outer wall of idler wheel outer ring in roll wheel assembly
Screw thread engages, and idler wheel outer ring 4 is driven to rotate, while leading screw 10 being driven to make to rise linear motion, the spring 17 in spring assembly with
The compressed energy-storage in effective travel of leading screw 10, the leading screw band dynamic loading in leading screw 10 rise；Position instruction device assembly instant 11 is anti-
Present the 10 load-carrying displaced position of institute of lead screw.
2, power regulation：
Electrical power, motor cracking rotor 9 are closed, the rotation in motor stator group 14 of cracking rotor 9, drive roll wheel assembly
It is rotated around wire 10, the screw thread on 4 outer wall of idler wheel outer ring in roll wheel assembly is engaged with the screw thread on 10 outer wall of lead screw, is driven
Idler wheel outer ring 4 rotates, while lead screw 10 being driven to make up and down linear motion, to dynamic loading up and down to specified point
Position, the spring 17 in spring assembly compresses in effective travel with leading screw 10, upholds energy storage.Position instruction device assembly 11 is
When feedback lead screw 10 institute load-carrying displaced positions.
3, power is kept：
Electrical power, motor cracking rotor 9 are closed, the rotation in motor stator group 14 of cracking rotor 9, drive roll wheel assembly
It is rotated around wire 10, the screw thread on 4 outer wall of idler wheel outer ring in roll wheel assembly is engaged with the screw thread on 10 outer wall of lead screw, is driven
Idler wheel outer ring 4 rotates, while lead screw 10 being driven to make up and down linear motion, to dynamic loading up and down to specified point
Position.When lead screw 10 is with dynamic loading to designated position, electrical power braking, motor cracking rotor 9 is still in closed state, electricity
Machine cracking rotor 9 does not rotate, and roll wheel assembly also stops rotating, and leading screw 10 is in designated position with dynamic loading, at this time spring assembly
In spring 17 in designated position compressed energy-storage.Position instruction device assembly 11 feeds back the 10 load-carrying displaced position of institute of lead screw.
4, normal shutdown：
When normal shutdown, motor cracking rotor 9 is closed, the rotation in motor stator group 14 of cracking rotor 9, drive roller group
Part is rotated around wire 10, and the screw thread on 4 outer wall of idler wheel outer ring in roll wheel assembly is engaged with the screw thread on 10 outer wall of lead screw, band
Dynamic idler wheel outer ring 4 rotates, while lead screw 10 being driven to make to decline linear motion, and the spring 17 in spring assembly is with leading screw 10 effective
It is upheld in stroke, leading screw 10 drives load reduction to normal shutdown position.It is negative that position instruction device assembly 11 feeds back 10 institute's band of lead screw
The displaced position of load.
5, breakdown：
When there is accident palpus emergency shut-down, motor power-off, motor cracking rotor 9 separates, and is not revolved in motor stator 14
Turn, motor cracks, and rotor 9 is separated, and the idler wheel outer ring 4 in drive roll wheel assembly is separated with leading screw 10 does not engage, and leading screw 10 is with spring
The energy stored when spring 17 compresses in component upholds rapidly decline, to achieve the purpose that quick scram.Position indicator group
Part 11 feeds back the 10 load-carrying displaced position of institute of lead screw.
The design of the present invention can increase substantially the life and reliability of control rod drive mechanism, can be kept after emergent rod drop
Original precision and structure are constant, can resume work rapidly, can be applied to nuclear submarine command bundle rods for nuclear reactors driving mechanism.
Example above combination attached drawing embodiments of the present invention are described.Although only to some specific implementations of the present invention
Mode and technical essential are made that description, but present invention is not limited to the embodiments described above, in those of ordinary skill in the art
Within the scope of knowledge, it can also be made a variety of changes under the premise of not departing from spirit of the invention.Therefore, it is shown
Example is considered as illustrative and not restrictive with embodiment, is not departing from this hair as defined in appended claims
In the case of bright spirit and scope, the present invention may cover various modification and replacement.
Claims (10)
1. a kind of command bundle rods for nuclear reactors driving mechanism, which is characterized in that including：
Crack rotor, lead screw, multiple roll wheel assemblies, position instruction device assembly, two bearings, motor housing, motor stator and bullet
Spring component, wherein：
The roll wheel assembly includes：Idler wheel inner ring, idler wheel outer ring, multiple rollers, two planet carriers and support shaft；
The spring assembly includes being supported under support, spring, spring on spring；
The multiple roll wheel assembly is fixedly mounted in the rectangular baltimore groove of cracking rotor one end, and lead screw setting turns in motor cracking
In son, multiple roll wheel assemblies are evenly arranged around lead screw, outside the idler wheel outer ring in the screw thread and roll wheel assembly on lead screw outer wall
Screw thread engagement on wall；Cracking rotor is fixed on by two bearing supports in motor stator, and crack rotor and motor stator entirety
It is fixed in motor housing；Position instruction device assembly is axially fixed on motor housing for feeding back lead screw with dynamic loading
Displaced position, spring is arranged on spring in spring assembly supported under support and spring between, axial restraint peace is supported on spring
It supports on motor housing, under spring and is connected with lead screw, compress and uphold with the linear motion up and down of lead screw.
2. command bundle rods for nuclear reactors driving mechanism according to claim 1, which is characterized in that ring outer wall in the idler wheel
It is provided at both ends with optical axis step, the screw thread that helix angle is zero is provided between the optical axis step at both ends；In the idler wheel outer ring
Wall is provided at both ends with optical axis step, is provided with the screw thread that helix angle is zero between the optical axis step at both ends, outside the idler wheel
Ring outer wall is also equipped with screw thread, has helix angle or no helix angle；The roller is provided at both ends with optical axis step, and two
The screw thread that helix angle is zero is provided between the optical axis step at end, in the screw thread on the roller and the idler wheel ring outer wall and
Thread pitch on the inner wall of idler wheel outer ring is identical to realize engagement；The planet carrier is circular ring shape, outside excircle and the idler wheel
The optical axis step cooperation on inner wall is enclosed, inner periphery coordinates with the optical axis step on ring outer wall in the idler wheel, and is evenly arranged with
Unthreaded hole；The idler wheel inner ring is nested in idler wheel outer ring, and described two annulus planet carriers are located at outside idler wheel inner ring and idler wheel
The annulus both ends being nested to form are enclosed, the optical axis step at the roller both ends is inserted into the unthreaded hole of the annulus planet carrier.
3. command bundle rods for nuclear reactors driving mechanism according to claim 2, which is characterized in that described cracking rotor one end exists
Circumferencial direction is evenly arranged at least four square grooves, the square groove perpendicular to two of cracking rotor axis it is symmetrical in
Supported hole is both provided on wall, the roll wheel assembly is arranged in square groove, and the support shaft passes through idler wheel inner ring, both ends to insert
Enter in supported hole.
4. command bundle rods for nuclear reactors driving mechanism according to claim 3, which is characterized in that the form of thread of the roller
The profile in section and the form of thread section on the outer ring outer wall of the idler wheel is convex arch profile, and 2 arc surface central diameter points are cut
The range at wire clamp angle is 30 degree to 150 degree.
5. command bundle rods for nuclear reactors driving mechanism according to claim 4, which is characterized in that the two arc surfaces central diameter point
Tangent line angle is 90 degree.
6. command bundle rods for nuclear reactors driving mechanism according to claim 5, which is characterized in that in the idler wheel ring outer wall and
Form of thread cross section profile on the inner wall of the idler wheel outer ring is triangular-shaped profile.
7. command bundle rods for nuclear reactors driving mechanism according to claim 6, which is characterized in that the command bundle rods for nuclear reactors
Driving mechanism further includes two elastic springs, in the arc groove on the optical axis step of idler wheel outer ring both ends.
8. command bundle rods for nuclear reactors driving mechanism according to claim 7, which is characterized in that the lead screw outer wall is provided with
Screw thread is any one faced directly in triangle thread, concave surface circular arc triangular tooth screw thread or trapezoidal thread, wherein the ladder
Shape screw thread is the trapezoidal thread by eliminating interference in tooth top and the correction of the flank shape of root interference position.
9. command bundle rods for nuclear reactors driving mechanism according to claim 8, which is characterized in that the spiral shell on the lead screw outer wall
Line tooth form cross section profile is concave surface arc profile, and the range of two arc surface central diameter point tangent line angles is 30 degree to 150 degree.
10. according to claim 9 be used for core heap control rod drive mechanism, which is characterized in that on the lead screw outer wall
Two arc surface central diameter point tangent line angles of form of thread are 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244767.7A CN108347129A (en) | 2018-03-23 | 2018-03-23 | A kind of command bundle rods for nuclear reactors driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244767.7A CN108347129A (en) | 2018-03-23 | 2018-03-23 | A kind of command bundle rods for nuclear reactors driving mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108347129A true CN108347129A (en) | 2018-07-31 |
Family
ID=62956893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810244767.7A Withdrawn CN108347129A (en) | 2018-03-23 | 2018-03-23 | A kind of command bundle rods for nuclear reactors driving mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108347129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901737A (en) * | 2021-01-21 | 2021-06-04 | 深圳大学 | Screw rod and reactor control rod driving mechanism |
-
2018
- 2018-03-23 CN CN201810244767.7A patent/CN108347129A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901737A (en) * | 2021-01-21 | 2021-06-04 | 深圳大学 | Screw rod and reactor control rod driving mechanism |
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Application publication date: 20180731 |