CN207895855U - A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism - Google Patents
A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism Download PDFInfo
- Publication number
- CN207895855U CN207895855U CN201820400021.6U CN201820400021U CN207895855U CN 207895855 U CN207895855 U CN 207895855U CN 201820400021 U CN201820400021 U CN 201820400021U CN 207895855 U CN207895855 U CN 207895855U
- Authority
- CN
- China
- Prior art keywords
- idler wheel
- lead screw
- wall
- thread
- driving mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Classifications
-
- 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
Landscapes
- Friction Gearing (AREA)
- Transmission Devices (AREA)
Abstract
The utility model provides a kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism, including：Multiple roll wheel assemblies, rotor, lead screw；The multiple outer roll wheel assembly is uniformly arranged in the square slot of rotor shaft end, evenly distributed in the circumferential direction, and the lead screw is arranged in rotor, and multiple roll wheel assemblies are evenly arranged around lead screw circumferencial direction；Screw thread in the roll wheel assembly on the outer ring outer wall of idler wheel is engaged with the screw thread on lead screw outer wall；Screw thread in the roll wheel assembly 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.Compared to traditional steel ball back-up roller wheel structure, the planetary roller lead screw pair provided by the utility model for command bundle rods for nuclear reactors driving mechanism eliminates interference, the carrying with bigger, and longer life expectancy is more reliable.
Description
Technical field
The utility model belongs to core field of mechanical technique, is driven for command bundle rods for nuclear reactors in particular to one kind
The planetary roller lead screw pair of mechanism.
Background technology
Currently used roller structure is to transmit movement, steel ball support using trapezoidal tooth form, and there are meshing interference, service life
It is short.The utility model command bundle rods for nuclear reactors driving mechanism roller structure can bear radial load and bear axial load,
Also radial load and axial load can be born simultaneously, compared with original trapezoidal screw auxiliary structure, eliminate interference, planetary roller
With lead screw be combined into can division, not clamping stagnation, big load, highly reliable leading screw auxiliary structure, life and reliability is greatly improved.
Utility model content
The utility model provides a kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism, for needing
Big load and high rotating speed application scenarios are carried, compared to traditional steel ball back-up roller wheel structure, planet provided by the utility model
Roller guide-screw pair has the ability of the carrying dynamic load of bigger, small, light-weight, and stability is good, longer life expectancy.
A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism, including：Rotor, lead screw, multiple rollings
Wheel assembly；Wherein：
The roll wheel assembly, including：Idler wheel inner ring, idler wheel outer ring, multiple rollers, two planet carriers and support shaft；
Ring outer wall is provided at both ends with optical axis step in the idler wheel, and helix angle is provided between the optical axis step at both ends
The screw thread for being zero；
Idler wheel outer ring inner wall is provided at both ends with optical axis step, and helix angle is provided between the optical axis step at both ends
The screw thread for being zero, the outer ring outer wall of the idler wheel are also equipped with screw thread, have helix angle or no helix angle；
The roller is provided at both ends with optical axis step, and the spiral shell that helix angle is zero is provided between the optical axis step at both ends
Line, screw thread on the roller is identical as the thread pitch on ring outer wall in the idler wheel and idler wheel outer ring inner wall to be nibbled with realizing
It closes；
The planet carrier is circular ring shape, and the optical axis step on excircle and idler wheel outer ring inner wall coordinates, inner periphery with
Optical axis step cooperation in the idler wheel on ring outer wall, and it 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 idler wheel inner ring and idler wheel
The optical axis step at the annulus both ends that outer ring is nested to form, the roller both ends is inserted into the unthreaded hole of the annulus planet carrier.
Preferably, the rotor is hollow-core construction, and it is rectangular recessed that rotor one end in circumferencial direction is evenly arranged at least four
Slot, the square groove are both provided with supported hole, the roll wheel assembly setting on two symmetrical inner walls of rotor axis
In square groove, the support shaft passes through idler wheel inner ring, both ends to be inserted into supported hole.
Preferably, the lead screw is located in rotor, and the multiple roll wheel assembly is evenly arranged around lead screw, the roller group
Screw thread on the outer ring outer wall of the idler wheel of part is engaged with the screw thread on lead screw outer wall.
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 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.The screw thread of the lead screw outer wall setting is trapezoidal thread, by tooth top and root interference portion
Trapezoidal thread after the specific correction of the flank shape in position, to eliminate interference.
When multiple roll wheel assemblies are rotated with rotor around lead screw, the spiral shell on the outer ring outer wall of idler wheel in multiple roll wheel assemblies
Line and the screw thread engaging friction on lead screw outer wall drive the rotation of idler wheel outer ring, the screw thread on the inner wall of idler wheel outer ring and several rollers
On screw thread engagement generate friction, drive several roller rotations, when several rollers rotations, screw thread on roller with outside idler wheel inner ring
Screw thread engagement on wall, drives several rollers to be rotated on ring outer wall in the idler wheel simultaneously together with planet carrier, forms several rollings
The revolution of column, idler wheel inner ring opposite support shaft in support shaft are fixed.
The beneficial effects of the utility model：
Traditional trapezoidal screw auxiliary structure reduces repetitive positioning accuracy, processing due to the severe of environment, high temperature, nut folding
There are deviation in the practical position of engagement of planetary roller lead screw pair caused by many factors such as error and the position of engagement of Theoretical Design, production
Raw interference engagement, there is big stress concentration in the position of engagement, leads to quick abrasion or scratch, short life, such as common steel ball axis
Hold that support construction bearing capacity is low, short life.The tooth form of former idler wheel external screw thread trapezium structure is changed into dome by the utility model
The tooth form of cambered surface triangle shape structure eliminates interference；There is small screw pitch than former trapezium structure tooth form, increase the quantity of thread groove,
Contact point is increased, bearing capacity is improved；Raw steel ball spring bearing structure is changed into planetary roller support construction, by structure
Service life improves 8-10 times or more.
Description of the drawings
Fig. 1 is the structure of the planetary roller lead screw pair provided by the utility model for command bundle rods for nuclear reactors driving mechanism
Schematic diagram.
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.
Reference numeral：
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- rotors；10- lead screws.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing.
Embodiment
As shown in Figure 1, 2, a kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism, 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；Rotor 9；Lead screw 10.
1 outer wall of idler wheel inner ring is provided at both ends with optical axis step, and being provided with helix angle between the optical axis step at both ends is
Zero screw thread.
4 inner wall of idler wheel outer ring is provided at both ends with optical axis step, and being provided with helix angle between the optical axis step at both ends is
Zero screw thread, 4 outer wall of idler wheel outer ring are also equipped with screw thread, can have helix angle or no 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 are 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 and 3, the wheel in the form of thread section on 4 outer wall of the form of thread section of roller 5 and idler wheel outer ring
Exterior feature 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
Profile.
First planet carrier 3 and the second planet carrier 6 are identical circular ring shape disc, excircle on 4 inner wall of idler wheel outer ring
Optical axis step coordinates, and inner periphery coordinates with the optical axis step on 1 outer wall of idler wheel inner ring, and light is evenly arranged on circular ring shape disc
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 at idler wheel inner ring 1
The optical axis step at the annulus both ends being nested to form with idler wheel outer ring 4,5 both ends of roller is inserted into first planet carrier 3 and respectively
In unthreaded hole on two planet carriers 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 are embedding
In arc groove on 4 both ends optical axis step of idler wheel outer ring.
In the square groove of 9 shaft end of rotor, the branch on rotor 9 is arranged in support shaft 8 for multiple roll wheel assembly integral installations
It supports in hole.
Lead screw 10 is arranged in 9 hollow inner wall of rotor, and multiple roll wheel assemblies are uniformly arranged around 10 circumferencial direction of lead screw,
Screw thread on 4 outer wall of idler wheel outer ring is identical as the thread pitch on 10 outer wall of lead screw and engages, and lead screw 10 directly couples load.
Operation principle：
When multiple roll wheel assemblies are rotated with rotor 9 around lead screw 10, on 4 outer wall of idler wheel outer ring in multiple roll wheel assemblies
Screw thread and 10 outer wall of lead screw on screw thread engaging friction, when driving that idler wheel outer ring 4 rotates in roll wheel assembly, in idler wheel outer ring 4
Screw thread on wall engages generation friction with the screw thread on several rollers 5, drives 5 rotation of several rollers, when several rollers 5 rotate,
Screw thread on roller 5 is engaged with the screw thread on 1 outer wall of idler wheel inner ring, drives several rollers 5 together with first planet carrier 3 and the second row
Carrier 6 rotates in the idler wheel on ring outer wall simultaneously, forms the revolution of several rollers 5 and a pair of of planet carrier, and idler wheel inner ring 1 exists
Opposite support shaft 8 is fixed in support shaft 8.Rotor 9 surrounds lead screw 10 for each revolution, above and below one helical pitch of work of lead screw 10
Linear motion, achievees the purpose that the load being directly coupled on lead screw 10 being sent to specified point.
The embodiment of example above combination attached drawing the utility model is described.Although only some to the utility model
Specific implementation mode and technical essential are made that description, and however, the present invention is not limited to the foregoing embodiments, in this field
Those of ordinary skill within the scope of knowledge, can also make various changes under the premise of not departing from the objective of the utility model
Change.Therefore, the example shown is considered as illustrative and not restrictive with embodiment, is not departing from such as appended each right
In the case of the spirit of the present invention and range defined in it is required that, the utility model may cover various modification and replacement.
Claims (8)
1. a kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism, which is characterized in that including：Rotor, silk
Bar, multiple roll wheel assemblies；Wherein：
The roll wheel assembly, including：Idler wheel inner ring, idler wheel outer ring, multiple rollers, two planet carriers and support shaft；
Ring outer wall is provided at both ends with optical axis step in the idler wheel, and it is zero to be provided with helix angle between the optical axis step at both ends
Screw thread；
Idler wheel outer ring inner wall is 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 outer ring outer wall of the idler wheel 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 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；
The planet carrier is circular ring shape, and the optical axis step on excircle and idler wheel outer ring inner wall coordinates, inner periphery with it is described
Optical axis step cooperation in idler wheel on ring outer wall, and it 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 idler wheel inner ring and idler wheel outer ring
The optical axis step at the annulus both ends being nested to form, the roller both ends is inserted into the unthreaded hole of the annulus planet carrier.
2. the planetary roller lead screw pair according to claim 1 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the rotor is hollow-core construction, and rotor one end is evenly arranged at least four square grooves in circumferencial direction, described rectangular recessed
Slot is both provided with supported hole on two symmetrical inner walls of rotor axis, and the roll wheel assembly is arranged in square groove,
The support shaft passes through idler wheel inner ring, both ends to be inserted into supported hole.
3. the planetary roller lead screw pair according to claim 2 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the lead screw is located in rotor, and the multiple roll wheel assembly is evenly arranged around lead screw, the idler wheel outer ring of the roll wheel assembly
Screw thread on outer wall is identical as the thread pitch on lead screw outer wall and engages.
4. the planetary roller lead screw pair according to claim 3 for command bundle rods for nuclear reactors driving mechanism, feature exists
In 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 is convex arch
The range of profile, two arc surface central diameter point tangent line angles is 30 degree to 150 degree.
5. the planetary roller lead screw pair according to claim 4 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the two arc surfaces central diameter point tangent line angle is 90 degree.
6. the planetary roller lead screw pair according to claim 5 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the form of thread cross section profile in the idler wheel on ring outer wall and idler wheel outer ring inner wall is triangular-shaped profile.
7. the planetary roller lead screw pair according to claim 6 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism further includes two elastic springs, is embedded in idler wheel
In arc groove on the optical axis step of outer ring both ends.
8. the planetary roller lead screw pair according to claim 7 for command bundle rods for nuclear reactors driving mechanism, feature exists
In the lead screw outer wall is provided with screw thread, faces directly in triangle thread, concave surface circular arc triangular tooth screw thread or trapezoidal thread
Any one, wherein the trapezoidal thread is the trapezoidal thread by eliminating interference in tooth top and the correction of the flank shape of root interference position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820400021.6U CN207895855U (en) | 2018-03-23 | 2018-03-23 | A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820400021.6U CN207895855U (en) | 2018-03-23 | 2018-03-23 | A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207895855U true CN207895855U (en) | 2018-09-21 |
Family
ID=63539965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820400021.6U Withdrawn - After Issue CN207895855U (en) | 2018-03-23 | 2018-03-23 | A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207895855U (en) |
-
2018
- 2018-03-23 CN CN201820400021.6U patent/CN207895855U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110107664B (en) | Reverse type planet roller screw rod of nut with large length-diameter ratio | |
| CN111779810B (en) | Planetary roller screw | |
| CN109854698A (en) | Planetary roller screw pair transmission mechanism | |
| CN102705465A (en) | Novel planet pin roller screw assembly | |
| US20100212444A1 (en) | Conjugate roller drive | |
| CN112413076A (en) | Differential planetary roller screw pair | |
| CN106931123A (en) | A kind of planetary roller screw with bidirectional self-locking function | |
| CN207895855U (en) | A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism | |
| CN108591393A (en) | Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism | |
| CN208057861U (en) | A kind of dead axle planetary screw lead | |
| CN108417281A (en) | A kind of planetary roller lead screw pair for command bundle rods for nuclear reactors driving mechanism | |
| CN109578520A (en) | Rolling friction worm and gear | |
| CN208057692U (en) | A kind of threaded rollers planetary bearing | |
| CN208057852U (en) | A kind of planetary roller structure for command bundle rods for nuclear reactors driving mechanism | |
| CN110374991B (en) | Double-wave-line ball speed reducing bearing with high rotation precision | |
| CN105422740B (en) | Lead screw gear | |
| CN108443445A (en) | A kind of dead axle planetary screw lead | |
| CN205315620U (en) | Power dividing formula planetary reducer | |
| CN112049907A (en) | Ring gear nut planet roller screw | |
| CN111853191A (en) | Nut type gearless constant lead planetary roller screw | |
| CN112032258A (en) | Non-backlash stepped roller enveloping worm drive | |
| CN108488338A (en) | A kind of planetary roller structure for command bundle rods for nuclear reactors driving mechanism | |
| CN208057859U (en) | Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism | |
| JP2007147070A (en) | Planetary roller screw device | |
| CN213655628U (en) | Planetary roller screw with novel roller structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180921 Effective date of abandoning: 20181203 |