JPS6029725Y2 - Sample rotation device for NMR equipment - Google Patents
Sample rotation device for NMR equipmentInfo
- Publication number
- JPS6029725Y2 JPS6029725Y2 JP5786178U JP5786178U JPS6029725Y2 JP S6029725 Y2 JPS6029725 Y2 JP S6029725Y2 JP 5786178 U JP5786178 U JP 5786178U JP 5786178 U JP5786178 U JP 5786178U JP S6029725 Y2 JPS6029725 Y2 JP S6029725Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- pressurized air
- sample
- supplied
- rotor
- 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.)
- Expired
Links
Landscapes
- Control Of Turbines (AREA)
Description
【考案の詳細な説明】
本考案は核磁気共鳴装置（ＮＭＲ装置）において用いら
れる試料回転装置に関するものである。[Detailed Description of the Invention] The present invention relates to a sample rotating device used in a nuclear magnetic resonance apparatus (NMR apparatus).
ＮＭＲ装置においては均一度の高い磁場が要求され、各
種補正装置によって均一度の改善が図られている。An NMR apparatus requires a highly uniform magnetic field, and various correction devices are used to improve the uniformity.
しかしながら補正装置による改善にも限界があり、試料
を回転させることにより磁場不均一を補うことが必要と
なっている。However, there are limits to the improvements made by the correction device, and it is necessary to compensate for magnetic field inhomogeneity by rotating the sample.
試料を回転させるには加圧空気が従来から用いられ実際
には試料を封入した試料管を空気軸受により保持し、試
料管に取り付けたロータに加圧空気を吹きつけて試料管
に回転を与えている。Conventionally, pressurized air is used to rotate the sample.In practice, the sample tube containing the sample is held by an air bearing, and pressurized air is blown onto a rotor attached to the sample tube to rotate the sample tube. ing.
試料を円滑にそして高速で回転させるためには（特に始
動時には回転の立上がりをよくするためにも）多量の加
圧空気が必要であり、従来の試料回転装置は十分な容量
を持つコンプレッサ等の加圧手段を備える必要があった
。In order to rotate the sample smoothly and at high speed, a large amount of pressurized air is required (particularly to improve the start-up of rotation at startup), and conventional sample rotation devices require a compressor or other device with sufficient capacity. It was necessary to provide a pressurizing means.
本考案は上述した点に鑑みてなされたものであり、小さ
な容量の加圧手段で有効に試料を回転させることのでき
る装置を提供することを目的とするものである。The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide an apparatus that can effectively rotate a sample using a small capacity pressurizing means.
第１図は本考案の一実施例を示す要部断面図である。FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.
同図において１は試料管であり、該試料管１はロータ２
に嵌合している。In the figure, 1 is a sample tube, and the sample tube 1 is rotor 2.
is fitted.
３は上記試料管１を通すための貫通孔及び上記ロータ２
を受けるための凹部を有するハウジングである。3 is a through hole for passing the sample tube 1 and the rotor 2;
The housing has a recess for receiving the housing.
該ハウジング３には加圧空気の通路４゜５が設けられ、
該通路４，５にはコンプレッサ６においてつくられた加
圧空気が連動弁７及び導管８．９を介して送られる。The housing 3 is provided with a pressurized air passage 4.5;
Pressurized air produced in a compressor 6 is fed into the channels 4, 5 via an interlock valve 7 and a conduit 8.9.
通路４に導入された加圧空気は試料管１とハウジング３
との間の細隙で送られるため、その部分にラジアル空気
軸受が形成される。The pressurized air introduced into the passage 4 is connected to the sample tube 1 and the housing 3.
Since the air is fed through the narrow gap between the two, a radial air bearing is formed in that area.
又通路５に導入された加圧空気は、ノズル１０を介して
ロータ２とハウジング３との接触面へ送られ該ロータ２
を浮上させると共に該ロータに回転を与える。Further, the pressurized air introduced into the passage 5 is sent to the contact surface between the rotor 2 and the housing 3 through the nozzle 10, and the rotor 2
and gives rotation to the rotor.
そのためロータ２は試料管１と共に回転する。Therefore, the rotor 2 rotates together with the sample tube 1.
斯かる構成において弁７は回転開始時導管８゜９へ送る
加圧空気の流量Ａｔ＝ Ａ２を開始時刻（Ｔ＝０）から
第２図に示す様にＡ１は徐々に増大、んは徐々に減少さ
せ、一定時間経過後夫々一定値となるように制御する。In such a configuration, the valve 7 increases the flow rate At=A2 of the pressurized air sent to the conduit 8.9 at the start of rotation from the start time (T=0) as shown in FIG. After a certain period of time has elapsed, control is performed so that the respective values become constant values.
Ａ１とＡ２の和は常に略一定値（コンプレッサ６の能力
に応じた）である。The sum of A1 and A2 is always a substantially constant value (according to the capacity of the compressor 6).
従って始動時にはロータ２に大な回転トルクが与えられ
るため、ラジアル空気軸受に供給される加圧空気量が少
ないために多少の心ぶれを伴なうものの短時間で回転数
が上昇する。Therefore, since a large rotational torque is applied to the rotor 2 at the time of starting, the rotational speed increases in a short period of time, although there is some fluctuation due to the small amount of pressurized air supplied to the radial air bearing.
回転数の上昇とともに空気軸受に供給される加圧空気量
が増大し、ロータに吹きつけられる加圧空気量が減少す
るため、ロータは心ぶれ等少ない状態で安定に回転し定
常状態となる。As the rotational speed increases, the amount of pressurized air supplied to the air bearing increases and the amount of pressurized air blown onto the rotor decreases, so the rotor stably rotates with little runout and reaches a steady state.
この様に、本考案にかかる試料回転装置はロータに回転
力を与えるためのノズルに供給する加圧空気量とラジア
ル気体軸受に供給する加圧空気量とを夫々の和が略一定
という関係を保ち相互に関連させて変化させる弁を備え
ているため、始動時にラジアル空気軸受に供給する加圧
空気量を減少させることによりノズルに供給する加圧空
気量を増大させ回転力を高めることができ、ロータを測
定可能な定常回転状態へ早く到達させることができ、同
じ到達時間であればコンプレッサの容量を小さくするこ
とがでるし、定常状態に到達した後はノズルに給給する
加圧空気量を減らし、ラジアル空気軸受に供給する加圧
空気量を増すことによりロータを心ぶれの小さな状態で
安定に回転させることができる。In this way, the sample rotation device according to the present invention maintains a relationship in which the sum of the amount of pressurized air supplied to the nozzle for applying rotational force to the rotor and the amount of pressurized air supplied to the radial gas bearing is approximately constant. Since it is equipped with valves that change the pressure in relation to each other, it is possible to reduce the amount of pressurized air supplied to the radial air bearing during startup, thereby increasing the amount of pressurized air supplied to the nozzle and increasing rotational force. , the rotor can reach a measurable steady rotation state faster, the compressor capacity can be reduced for the same arrival time, and once the steady state is reached, the amount of pressurized air supplied to the nozzle can be reduced. By reducing the amount of pressurized air supplied to the radial air bearing and increasing the amount of pressurized air supplied to the radial air bearing, the rotor can be rotated stably with less runout.
尚上述した実施例では弁は時間の経過と共にＡｌ、Ａｌ
を制御したが、これに限らずロータの回転数を検出し、
その回転数の上昇に対応させてＡ１．Ａ２を制御するよ
うにしても良い。In the above-mentioned embodiment, the valve becomes Al and Al over time.
However, it is not limited to this, it also detects the rotation speed of the rotor,
Corresponding to the increase in rotation speed, A1. A2 may also be controlled.
第１図は本考案の一実施例を示す要部断面図、第２図は
弁の動作を説明するための図である。
１：試料管、２：ロータ、４，５：通路、６：コンプレ
ッサ、７：弁、８，９：導管。FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is a diagram for explaining the operation of the valve. 1: sample tube, 2: rotor, 4, 5: passage, 6: compressor, 7: valve, 8, 9: conduit.
Claims (1)
、該試料管に回転を与えるための気体噴出ノズルと、前
記ラジアル気体軸受及びノズルに供給する加圧空気を作
成するための手段と、該加圧気体作成手段と前記ラジア
ル気体軸受及びノズルを結ぶ流路に挿入され、前記ノズ
ルに供給する加圧気体流量と前記ラジアル気体軸受に給
する加圧気体流量とを夫々の和が略一定という関係を保
ち相互に関連させて変化させるための弁より構成される
ことを特徴とするＮＭＲ装置の試料回転装置。a radial gas bearing for rotatably holding a sample tube; a gas jet nozzle for imparting rotation to the sample tube; a means for producing pressurized air to be supplied to the radial gas bearing and the nozzle; It is said that the sum of the pressurized gas flow rate that is inserted into a flow path connecting the pressurized gas generating means and the radial gas bearing and the nozzle and is supplied to the nozzle and the pressurized gas flow rate that is supplied to the radial gas bearing is approximately constant. A sample rotating device for an NMR apparatus, characterized in that it is comprised of valves for maintaining relationships and making changes in relation to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5786178U JPS6029725Y2 (en) | 1978-04-28 | 1978-04-28 | Sample rotation device for NMR equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5786178U JPS6029725Y2 (en) | 1978-04-28 | 1978-04-28 | Sample rotation device for NMR equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54160197U JPS54160197U (en) | 1979-11-08 |
| JPS6029725Y2 true JPS6029725Y2 (en) | 1985-09-07 |
Family
ID=28956141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5786178U Expired JPS6029725Y2 (en) | 1978-04-28 | 1978-04-28 | Sample rotation device for NMR equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029725Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315886A (en) * | 2006-05-25 | 2007-12-06 | Hitachi Ltd | Gas bearing for nuclear magnetic resonance apparatus, and the nuclear magnetic resonance apparatus |
-
1978
- 1978-04-28 JP JP5786178U patent/JPS6029725Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54160197U (en) | 1979-11-08 |
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