JPS599587A - Reactor control rod drive mechanism - Google Patents
Reactor control rod drive mechanismInfo
- Publication number
- JPS599587A JPS599587A JP57116727A JP11672782A JPS599587A JP S599587 A JPS599587 A JP S599587A JP 57116727 A JP57116727 A JP 57116727A JP 11672782 A JP11672782 A JP 11672782A JP S599587 A JPS599587 A JP S599587A
- Authority
- JP
- Japan
- Prior art keywords
- ball screw
- control rod
- ball
- rod drive
- reactor control
- 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.)
- Pending
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
- Steering Control In Accordance With Driving Conditions (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、原子炉制御棒駆動装置に係シ、特に液体金属
す） ＩＪウム冷却型原子炉である高速増殖原子炉に好
適な原子炉制御棒駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear reactor control rod drive device, and more particularly to a nuclear reactor control rod drive device suitable for a fast breeder reactor which is a liquid metal (IJ) cooled nuclear reactor.
従来の原子炉制御棒駆動装置の一例を第１図に示す。An example of a conventional nuclear reactor control rod drive device is shown in FIG.
従来の原子炉制御棒駆動装置においては、ボールネジの
上端、下端及び中間部（ボールネジナツト部）の合計３
箇所が拘束されている。組立時、この３箇所のボールネ
ジ軸間距離及びボールネジナツト部間距離を一致させる
ことは、非常にむずかしい。このため、Ｒ＆Ｄの試験中
においては、ボールネジの駆動中、ボールネジに無理な
力がかかったシ、異常回転音が発生したり、回転トルク
のムラが発生したシする不具合が頻発した。これがさら
に進んでいくと、ボールネジの損傷、延いては、原子炉
制御棒駆動装置の信頼性の低下をまねく恐れが多分にあ
る。In the conventional reactor control rod drive system, the upper end, lower end, and middle part (ball screw nut part) of the ball screw have a total of 3 parts.
The area is restricted. During assembly, it is very difficult to match the distance between the ball screw shafts and the distance between the ball screw nut portions at these three locations. For this reason, during R&D tests, problems such as excessive force being applied to the ball screw while driving the ball screw, abnormal rotation noise, and uneven rotational torque frequently occurred. If this problem continues, there is a strong possibility that the ball screw will be damaged and the reliability of the reactor control rod drive system will be reduced.
また、ボールネジの下端をボールベアリングで固定して
いるため、ボールネジ及び被駆動部等をメンテナンスの
ため、駆動部ハウジング内からの取シ出し、あるいは、
組み込みするとき、ボールネジの下端の、同ボールベア
リングからの取り外し、あるいは、挿入は、むずかしく
て、同ボールベアリングが損傷する恐れも多分にあり、
非常に不便である。In addition, since the lower end of the ball screw is fixed with a ball bearing, it is difficult to remove the ball screw and driven parts from inside the drive housing for maintenance.
When assembled, it is difficult to remove or insert the lower end of the ball screw from the ball bearing, and there is a high risk of damaging the ball bearing.
Very inconvenient.
本発明の目的は、２本のボールネジの上端は固定し、下
端は、固定せず、自由端にして、かつ、ボールネジナツ
ト部が回転するのを防止するガイドキー構を設けること
により、ボールネジの損傷を防止し、そして、ボールネ
ジ及び被駆動部等の分解組立を容易にしてメンテナンス
性を高め、信頼性を非常に高めた原子炉制御棒駆動装置
を提供することにある。The object of the present invention is to fix the upper ends of two ball screws, leave the lower ends unfixed and leave them free, and provide a guide key mechanism to prevent the ball screw nut from rotating. It is an object of the present invention to provide a nuclear reactor control rod drive device that prevents damage, facilitates disassembly and assembly of ball screws, driven parts, etc., improves maintainability, and has extremely high reliability.
本発明は、２本のボールネジの拘束箇所員数を、ボール
ネジの下端を自由端にすることにより、３箇所から２箇
所にすることにより、ボールネジ軸間距離とボールネジ
ナツト部間距離との調整を容易にして、ボールネジの損
傷を防止し、かつボールネジ及び被駆動部等のメンテナ
ンス性を高めて、制御棒駆動装置の信頼性を高める。The present invention makes it easy to adjust the distance between the ball screw axes and the distance between the ball screw nut parts by reducing the number of restraint points for the two ball screws from three to two by making the lower ends of the ball screws free ends. This prevents damage to the ball screw, improves maintainability of the ball screw, driven parts, etc., and increases reliability of the control rod drive device.
以下、本発明の一実施例を、第１図、第２図及び第３図
により説明する。An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.
制御棒１０の上下動（引抜及び挿入）は、主モータ１に
よる回転を、平歯車２を介して、２本のボールネジ３に
より、上下動に変え、ボールネジ３のナツト部４に吊シ
下がる被駆動部７及び駆動延長軸８を上下動させること
によシ行う。制御棒１０は、駆動延長軸８の最下端にあ
るグリッパ−（３）
９によシ連結している。The vertical movement (extraction and insertion) of the control rod 10 is achieved by converting the rotation by the main motor 1 into vertical movement by the two ball screws 3 via the spur gear 2, and by changing the rotation by the main motor 1 to vertical movement by the two ball screws 3, which are suspended from the nut portion 4 of the ball screw 3. This is done by moving the drive section 7 and drive extension shaft 8 up and down. The control rod 10 is connected to a gripper (3) 9 at the lowermost end of the drive extension shaft 8.
２本のボールネジ３は、その上端は、ボールベアリング
５で固定され、下端１２は、固定されず、自由端になっ
ている。The upper ends of the two ball screws 3 are fixed by ball bearings 5, and the lower ends 12 are not fixed and are free ends.
また、ハウジング６には、ボールネジ３のナツト部４等
が回転あるいは横振れするのを防止するガイドキー１３
が取シ付けである。The housing 6 also includes a guide key 13 that prevents the nut portion 4 of the ball screw 3 from rotating or wobbling laterally.
is the installation.
ボールネジ３のナツト部４が上下動するときは、ボール
ネジ３の下端が、固定されず、自由端になっているため
、ボールネジ３のネジ軸は、ナツト部４の動きに追従し
て、自由に曲がることができ、無理な力がかからず、ス
ムーズに駆動することができる。When the nut part 4 of the ball screw 3 moves up and down, the lower end of the ball screw 3 is not fixed and becomes a free end, so the screw shaft of the ball screw 3 follows the movement of the nut part 4 and moves freely. It can bend and drive smoothly without applying excessive force.
また、メンテナンスのため、ボールネジ３及び被駆動部
７等を、ハウジング６内から取り出し、あるいは、組み
込むときは、ボールネジ３の下端１２にボールベアリン
グ１１がないため、非常に簡単に行うことができる。Further, when the ball screw 3, the driven part 7, etc. are removed from the housing 6 for maintenance, or assembled into the housing 6, this can be done very easily because the ball bearing 11 is not provided at the lower end 12 of the ball screw 3.
本発明の一実施例によれば、ボールネジ３は、無理な力
がかからないため、損傷を防止でき、か（４）
つ、メンテナンス性を高めることができて、原子炉制御
棒駆動装置の信頼性が、従来に比べ、非常に高くなる。According to one embodiment of the present invention, the ball screw 3 is not subjected to excessive force, so damage can be prevented, and (4) maintainability can be improved, increasing the reliability of the reactor control rod drive device. However, it is much higher than before.
本発明によれば、次に示す効果がある。According to the present invention, there are the following effects.
（１）２本のボールネジは、スムーズに駆動することが
でき、無理な力がかからないため、損傷を防止すること
ができる。(1) The two ball screws can be driven smoothly and no excessive force is applied to them, so damage can be prevented.
（２）ボールネジ及び被駆動部等の、ハウジング内から
の取り出し、あるいは、組み込みが、簡単にできるため
、そのメンテナンス性が高くなる。(2) Since the ball screw, driven parts, etc. can be easily taken out or assembled into the housing, its maintainability is improved.
（３） ｆｌ）項及び（２）項により、原子炉制御棒
駆動機構の信頼性が非常に高くなる。(3) Items (fl) and (2) greatly increase the reliability of the reactor control rod drive mechanism.
第１図は、従来の原子炉制御棒駆動装置の構造図、第２
図は、本発明の一実施例の構造図、第３図は、第２図の
Ａ−Ａ矢視断面図である。
３・・・ボールネジ、４・・・ボールネジのナツト部、
■ １ 図
？
３
〆
／ｌ ／／
／Ｚ
２
ざ
ワ
ｌθ
第２図
第３図
４５９−Figure 1 is a structural diagram of a conventional nuclear reactor control rod drive system;
The figure is a structural diagram of one embodiment of the present invention, and FIG. 3 is a sectional view taken along the line A-A in FIG. 2. 3...Ball screw, 4...Ball screw nut part,
■ 1 Figure? 3 〆/l // /Z 2 Zawa lθ Fig. 2 Fig. 3 459-
Claims (1)
機能により、制御棒を駆動させる原子炉制御棒駆動装置
において、２本のボールネジの上端は、ボールベアリン
グ等で固定し、同ボールネジの下端は、固定せず、自由
端にして、かつ、同ボールネジのナツト部が回転するの
を防止するガイドキー構造を、設けたことを特徴とする
原子炉制御棒駆動装置。1. In a nuclear reactor control rod drive device that drives control rods by the function of two ball screws that convert rotational motion into linear motion, the upper ends of the two ball screws are fixed with ball bearings, etc., and the lower ends of the two ball screws are fixed with ball bearings, etc. A nuclear reactor control rod drive device, characterized in that the ball screw has a free end without being fixed, and is provided with a guide key structure that prevents the nut portion of the ball screw from rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116727A JPS599587A (en) | 1982-07-07 | 1982-07-07 | Reactor control rod drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116727A JPS599587A (en) | 1982-07-07 | 1982-07-07 | Reactor control rod drive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS599587A true JPS599587A (en) | 1984-01-18 |
Family
ID=14694298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57116727A Pending JPS599587A (en) | 1982-07-07 | 1982-07-07 | Reactor control rod drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS599587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132194A (en) * | 1985-12-05 | 1987-06-15 | 株式会社東芝 | Electric control-rod drive mechanism for nuclear power plant |
-
1982
- 1982-07-07 JP JP57116727A patent/JPS599587A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62132194A (en) * | 1985-12-05 | 1987-06-15 | 株式会社東芝 | Electric control-rod drive mechanism for nuclear power plant |
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