CN108591393A - Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism - Google Patents
Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism Download PDFInfo
- Publication number
- CN108591393A CN108591393A CN201810244602.XA CN201810244602A CN108591393A CN 108591393 A CN108591393 A CN 108591393A CN 201810244602 A CN201810244602 A CN 201810244602A CN 108591393 A CN108591393 A CN 108591393A
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- China
- Prior art keywords
- screw
- screw thread
- thread
- circular arc
- wall
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The present invention provides a kind of circular arc tooth form screw thread roller guide-screw pairs for core heap control rod drive mechanism, including：Multiple roll wheel assemblies, rotor, lead screw, the roll wheel assembly include idler wheel outer ring, two baffle rings and two groups of steel balls；Roll wheel assembly is uniformly arranged in the square slot of rotor shaft end, evenly distributed in the circumferential direction, and lead screw is arranged in the hollow inner wall of rotor, and multiple roll wheel assemblies are evenly arranged around lead screw circumferencial direction.Compared to the lead screw pair of former trapezium structure, dome arc thread tooth has smaller screw pitch, eliminates interference, the carrying with bigger, and longer life expectancy is more reliable.
Description
Technical field
The invention belongs to core field of mechanical technique, in particular to a kind of circle for core heap control rod drive mechanism
Arc tooth form screw thread roller guide-screw pair.
Background technology
Currently used roller guide-screw pair is to transmit movement using trapezoidal tooth form, and there are meshing interference, short lifes.The present invention
Command bundle rods for nuclear reactors driving mechanism roller guide-screw pair can bear radial load and bear axial load, can also hold simultaneously
By radial load and axial load, compared with original trapezoidal screw pair, interference, circular arc tooth form screw thread idler wheel and lead screw are eliminated
Be combined into can division, not clamping stagnation, big load, highly reliable leading screw auxiliary structure, life and reliability is greatly improved.
Invention content
The object of the present invention is to provide a kind of circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism,
It solves to cannot be satisfied using the structure of trapezoidal screw pair when needing to carry big load, high rotating speed and needs to become instead weak easy
Part, short life this technical problem are damaged, Novel arc tooth form screw thread roller guide-screw auxiliary structure of the present invention has the carrying of bigger dynamic
The ability of state load, longer life expectancy.
A kind of circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism, including：Multiple roll wheel assemblies,
Rotor, lead screw；
The roll wheel assembly includes idler wheel outer ring, two baffle rings, two groups of steel balls and support shaft,
The idler wheel outer ring inner wall both ends are both provided with arc-shaped raceway, and spiral shell is provided on the outer wall of the idler wheel outer ring
Line, form of thread are convex arc toothed, have helix angle or without helix angle；
The baffle ring side is provided with arc-shaped raceway, the arc-shaped raceways of two baffle rings respectively with idler wheel outer ring inner wall two
The arc-shaped raceway at end cooperatively forms two annular spaces, and two groups of steel balls are located in described two annular spaces；
The support shaft runs through the unthreaded hole of described two baffle rings.
In above structure, in the outer circle of steel ball and two arc-shaped raceways on the inner wall of idler wheel outer ring and two baffle rings
Arc-shaped raceway contact, two groups of steel ball back-up roller wheel structure rotations, support shaft support entire steel ball through the unthreaded hole of two baffle rings
Roller structure.
Further, the range of two arc surface central diameter point tangent line angles of the form of thread on the outer wall of the idler wheel outer ring
It is 30 degree to 150 degree.
Further, two arc surface central diameter point tangent line angles of the form of thread on the outer wall of the idler wheel outer ring are 90
Degree.
Further, the rotor is hollow-core construction, and it is rectangular that rotor one end in circumferencial direction is evenly arranged at least four
Groove, the square groove are both provided with supported hole on two symmetrical inner walls of rotor axis, and the roll wheel assembly is set
It sets in square groove, the support shaft passes through baffle ring, both ends to be inserted into supported hole.
Further, the lead screw outer wall is provided with screw thread, is to face triangle thread, concave surface circular arc triangular tooth screw thread directly
Or any one in trapezoidal thread, wherein the trapezoidal thread is dry by being eliminated in tooth top and the correction of the flank shape of root interference position
The trapezoidal thread related to.
Further, the lead screw is located in rotor, and the multiple roll wheel assembly is evenly arranged around lead screw, the idler wheel
Screw thread on the outer ring outer wall of the idler wheel of component is identical as the thread pitch on lead screw outer wall and engages.
Beneficial effects of the present invention：
The trapezoidal screw pair of traditional structure reduces repetitive positioning accuracy since the severe of environment, high temperature, nut open and close, adds
There are deviation in the practical position of engagement of trapezoidal screw pair caused by many factors such as work error and the position of engagement of Theoretical Design, generate
There are big stress concentration in meshing interference, the position of engagement, lead to quick abrasion or scratch, short life.The present invention will be outside common idler wheel
The tooth form of screw thread trapezium structure changes into the tooth form that tooth form is convex arc surface structure, eliminates interference, and service life improves 8 to 10
Times；Compared to former trapezium structure tooth form, dome arc thread tooth has smaller screw pitch, increases the quantity of thread groove, increase and connect
Bearing capacity is improved in contact, improves service life.
Description of the drawings
Fig. 1 is the signal provided by the present invention for the circular arc tooth form screw thread roller guide-screw pair of core heap control rod drive mechanism
Figure.
Fig. 2 is the structure enlargement diagram of roll wheel assembly A provided by the invention
Fig. 3 is that circular arc tooth form screw thread idler wheel outer wall convex arch screw thread of the present invention amplifies with the section that lead screw engages is matched
Figure.
Reference numeral：
Baffle ring on the left of 1-；Steel ball on the left of 2-；3- idler wheels outer ring；Steel ball on the right side of 4-；Baffle ring on the right side of 5-；6- support shafts；7- turns
Son；8- lead screws.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing.
Embodiment 1：
As shown in Figure 1, a kind of circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism, including：It is left
Side block ring 1, left side steel ball 2, idler wheel outer ring 3, right side steel ball 4, right side baffle ring 5, support shaft 6, rotor 7, lead screw 8.
3 inner wall both ends of idler wheel outer ring are both provided with arc-shaped raceway, and screw thread is provided on the outer wall of idler wheel outer ring 3.Such as Fig. 2
Shown in 3, form of thread is convex arc toothed, it is to be appreciated that the screw thread on the outer wall of idler wheel outer ring 3 can have spiral shell
Revolve lift angle or without helix angle.The range of two arc surface central diameter point tangent line angles of form of thread is 30 degree to 150 degree, preferably 90
Degree.
The side of left side baffle ring 1 and right side baffle ring 5 is both provided with arc-shaped raceway, the arc-shaped raceway difference of two baffle rings
Two annular spaces are cooperatively formed with the arc-shaped raceway at 3 inner wall both ends of idler wheel outer ring, two groups of steel balls are located at above-mentioned two
In annular space.
Circular arc tooth form screw thread roller structure for core heap control rod drive mechanism further includes running through left side baffle ring 1 and right side
The support shaft 6 of the unthreaded hole of baffle ring 5.
The outer circle of steel ball and two arc-shaped raceways on the inner wall of idler wheel outer ring and the arc-shaped raceway on two baffle rings
Contact, two groups of steel ball back-up roller wheel structure rotations, support shaft 6 support entire roll wheel assembly through the unthreaded hole of two baffle rings.
In the square groove of 7 shaft end of rotor, the branch on rotor 7 is arranged in support shaft 6 for multiple roll wheel assembly integral installations
It supports in hole.
Lead screw 8 is arranged in 7 hollow inner wall of rotor, and multiple roll wheel assemblies are uniformly arranged around 8 circumferencial direction of lead screw, rolling
Screw thread on wheel 3 outer wall of outer ring is engaged with the screw thread on 8 outer wall of lead screw, and lead screw 8 directly couples load.
Operation principle：
Rotor 7 rotates, and roll wheel assembly is driven to be rotated around lead screw 8, and the idler wheel outer ring 3 in roll wheel assembly is nibbled with lead screw 7
Friction is closed, drives idler wheel outer ring 3 around 6 rotation of support shaft, while rotor 7 often rotates a circle around lead screw 8, lead screw 8 makees one
The linear motion up and down of a helical pitch achievees the purpose that the load being directly coupled on lead screw 8 being sent to specified point.
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 (6)
1. a kind of circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism, which is characterized in that including：It is multiple
Roll wheel assembly, rotor, lead screw；
The roll wheel assembly includes idler wheel outer ring, two baffle rings, two groups of steel balls and support shaft, and the idler wheel outer ring inner wall both ends are equal
It is provided with arc-shaped raceway, screw thread is provided on the outer wall of the idler wheel outer ring, form of thread is convex arc toothed, has spiral
Lift angle or without helix angle；
The baffle ring side is provided with arc-shaped raceway, the arc-shaped raceways of two baffle rings respectively with idler wheel outer ring inner wall both ends
Arc-shaped raceway cooperatively forms two annular spaces, and two groups of steel balls are located in described two annular spaces；
The support shaft runs through the unthreaded hole of described two baffle rings.
2. the circular arc tooth form screw thread roller guide-screw pair according to claim 1 for core heap control rod drive mechanism, special
Sign is, the ranges of two arc surface central diameter point tangent line angles of the form of thread on the outer wall of the idler wheel outer ring be 30 degree extremely
150 degree.
3. the circular arc tooth form screw thread roller guide-screw pair according to claim 2 for core heap control rod drive mechanism, special
Sign is that two arc surface central diameter point tangent line angles of the form of thread on the outer wall of the idler wheel outer ring are 90 degree.
4. the circular arc tooth form screw thread roller guide-screw pair according to claim 3 for core heap control rod drive mechanism, special
Sign is that the rotor is hollow-core construction, and rotor one end is evenly arranged at least four square grooves, the side in circumferencial direction
Connected in star is both provided with supported hole on two symmetrical inner walls of rotor axis, and the roll wheel assembly is arranged in square groove
Interior, the support shaft passes through baffle ring, both ends to be inserted into supported hole.
5. the circular arc tooth form screw thread roller guide-screw pair according to claim 4 for core heap control rod drive mechanism, special
Sign is that the lead screw outer wall is provided with screw thread, is to face triangle thread, concave surface circular arc triangular tooth screw thread or trapezoidal thread directly
In any one, wherein the trapezoidal thread is the trapezoidal spiral shell by eliminating interference in tooth top and the correction of the flank shape of root interference position
Line.
6. the circular arc tooth form screw thread roller guide-screw pair according to claim 5 for core heap control rod drive mechanism, special
Sign is that the lead screw is located in rotor, and the multiple roll wheel assembly is evenly arranged around lead screw, the idler wheel of the roll wheel assembly
Screw thread on outer ring outer wall is identical as the thread pitch on lead screw outer wall and engages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244602.XA CN108591393A (en) | 2018-03-23 | 2018-03-23 | Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244602.XA CN108591393A (en) | 2018-03-23 | 2018-03-23 | Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591393A true CN108591393A (en) | 2018-09-28 |
Family
ID=63627305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810244602.XA Withdrawn CN108591393A (en) | 2018-03-23 | 2018-03-23 | Circular arc tooth form screw thread roller guide-screw pair for core heap control rod drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591393A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236966A (en) * | 2018-09-30 | 2019-01-18 | 孟永正 | A kind of high thrust ball screw |
| CN112685933A (en) * | 2020-12-24 | 2021-04-20 | 中国人民解放军海军工程大学 | Method for predicting residual service life of roller screw pair |
-
2018
- 2018-03-23 CN CN201810244602.XA patent/CN108591393A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236966A (en) * | 2018-09-30 | 2019-01-18 | 孟永正 | A kind of high thrust ball screw |
| CN109236966B (en) * | 2018-09-30 | 2023-11-07 | 孟永正 | High thrust ball screw |
| CN112685933A (en) * | 2020-12-24 | 2021-04-20 | 中国人民解放军海军工程大学 | Method for predicting residual service life of roller screw pair |
| CN112685933B (en) * | 2020-12-24 | 2022-10-18 | 中国人民解放军海军工程大学 | Method for predicting residual service life of roller screw pair |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180928 |