JPH0571897B2 - - Google Patents
Info
- Publication number
- JPH0571897B2 JPH0571897B2 JP8896590A JP8896590A JPH0571897B2 JP H0571897 B2 JPH0571897 B2 JP H0571897B2 JP 8896590 A JP8896590 A JP 8896590A JP 8896590 A JP8896590 A JP 8896590A JP H0571897 B2 JPH0571897 B2 JP H0571897B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- shaft seal
- rotating shaft
- shaft
- rotor yoke
- 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 - Lifetime
Links
- 238000012360 testing method Methods 0.000 claims description 32
- 238000006073 displacement reaction Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 description 10
- 238000001514 detection method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回転流体機械に用いる軸封・軸受の特
性を試験・測定する軸封・軸受試験装置に関し、
特に磁気軸受を具備する軸封・軸受試験装置に関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a shaft seal/bearing testing device for testing and measuring the characteristics of shaft seals/bearings used in rotating fluid machines.
In particular, the present invention relates to a shaft seal/bearing testing device equipped with a magnetic bearing.
従来、回転流体機械に用いる軸封・軸受の静特
性、動特性或いは耐久性を試験・測定する軸封・
軸受試験装置においては、実際の使用条件を模擬
した相対運動を供試軸封・軸受と回転軸の間に発
生させることを必要とする。このため回転軸を支
持する転がり軸受の外周部に所定の半径方向や軸
方向の相対運動を発生させるための油圧加振機な
どを利用した機械的案内機構を必要としている。
Conventionally, shaft seals and bearings used in rotating fluid machines are tested and measured for their static characteristics, dynamic characteristics, or durability.
In a bearing testing device, it is necessary to generate relative motion between the shaft seal/bearing under test and the rotating shaft that simulates actual operating conditions. Therefore, a mechanical guide mechanism using a hydraulic vibrator or the like is required to generate a predetermined relative movement in the radial direction or the axial direction on the outer circumference of the rolling bearing that supports the rotating shaft.
上記のように従来の回転流体機械に用いる軸
封・軸受の静特性、動特性或いは耐久性を試験・
測定する軸封・軸受試験装置では、実際の使用条
件を文字した相対運動を供試軸封・軸受と回転軸
の間に発生されるための機械的案内機構を必要と
するため試験装置の構造が複雑となるという問題
があつた。さらに、軸受・軸封部から発生する反
力を計測するための力計などの測定機を供試体の
外周部に付ける必要があり、これも試験装置の構
造を複雑としていた。
As mentioned above, the static characteristics, dynamic characteristics, and durability of shaft seals and bearings used in conventional rotary fluid machines are tested and
The shaft seal/bearing test equipment to be measured requires a mechanical guide mechanism to generate relative motion between the shaft seal/bearing under test and the rotating shaft that reflects the actual usage conditions, so the structure of the test equipment must be adjusted accordingly. The problem was that it was complicated. Furthermore, it was necessary to attach a measuring device such as a force meter to the outer periphery of the test piece to measure the reaction force generated from the bearing/shaft seal, which also complicated the structure of the test equipment.
本発明は上述の点に鑑みてなされたもので、上
記問題点を除去し、簡単な構成でご実際の使用条
件を模擬することができると共に、軸受・軸封部
から発生する反力も容易に測定できる軸封・軸受
試験装置を提供することを目的とする。 The present invention has been made in view of the above-mentioned points, and can eliminate the above-mentioned problems and simulate actual usage conditions with a simple configuration, and can easily reduce reaction forces generated from bearings and shaft seals. The purpose is to provide a shaft seal/bearing testing device that can perform measurements.
上記課題を解決するため本発明は、回転流体機
械に用いる軸封・軸受の特性を試験・測定する軸
封・軸受試験装置を下記の如く構成した。
In order to solve the above problems, the present invention has constructed a shaft seal/bearing testing device as follows for testing and measuring the characteristics of shaft seals/bearings used in rotating fluid machines.
供試軸封・軸受を貫通する回転軸に固着して磁
性材料製の回転子継鉄と、該回転子継鉄から適切
な隙間を設けて軸封・軸受試験装置のケーシング
に固定され且つ起磁力を発生するコイルを備えた
固定子電磁石と、回転軸とケーシング間の相対変
位を測定する変位センサと、回転軸に所定の運動
を与えるための外部信号を該変位センサからの出
力信号に加算する加算機と、加算器からの出力信
号をもとに回転子継鉄と固定子電磁石との間に作
用する磁気吸引力を制御する補償回路と電力増幅
器とを具備する磁気軸受を設けたことを特徴とす
る。 A rotor yoke made of a magnetic material is fixed to the rotating shaft passing through the shaft seal/bearing under test, and a rotor yoke is fixed to the casing of the shaft seal/bearing test equipment with an appropriate gap from the rotor yoke and A stator electromagnet equipped with a coil that generates magnetic force, a displacement sensor that measures the relative displacement between the rotating shaft and the casing, and an external signal that gives the rotating shaft a predetermined motion is added to the output signal from the displacement sensor. A magnetic bearing is provided with an adder, a compensation circuit and a power amplifier for controlling the magnetic attraction force acting between the rotor yoke and the stator electromagnet based on the output signal from the adder. It is characterized by
本発明は軸封・軸受試験装置を上記の如く構成
することにより、回転子継鉄、固定子電磁石、変
位センサ、加算機、補償回路及び電力増幅器とを
具備する磁気軸受では、回転子継鉄と固定子電磁
石との間の隙間を転がり軸受や滑り軸受よりも大
きくできる。しかも、磁気軸受の変位センサの出
力に相対運動を模擬するための外部信号を加算
し、磁気軸受制御の目標値を変化させることによ
つて回転軸を任意に制御できる。即ち、実際の使
用条件の簡単に模擬することができる。
By configuring the shaft seal/bearing testing device as described above, the present invention provides a magnetic bearing equipped with a rotor yoke, a stator electromagnet, a displacement sensor, an adder, a compensation circuit, and a power amplifier. The gap between the magnet and the stator electromagnet can be made larger than in rolling bearings or sliding bearings. Moreover, by adding an external signal for simulating relative motion to the output of the displacement sensor of the magnetic bearing and changing the target value for magnetic bearing control, the rotating shaft can be arbitrarily controlled. That is, actual usage conditions can be easily simulated.
磁気軸受の磁気吸引力は概ね軸受隙間の２乗に
逆比例するから、試験装置ケーシングに固定され
且つ起磁力を発生する固定電磁石に流す励磁電
流、磁気軸受隙間、磁気吸引力の間の関係を予め
検定しておくことにより、供試体から発生する反
力を磁気軸受の軸受反力として計測することがで
きる。 Since the magnetic attraction force of a magnetic bearing is roughly inversely proportional to the square of the bearing gap, the relationship between the excitation current flowing through the fixed electromagnet that is fixed to the test equipment casing and generates the magnetomotive force, the magnetic bearing gap, and the magnetic attraction force can be expressed as follows: By performing verification in advance, the reaction force generated from the specimen can be measured as the bearing reaction force of the magnetic bearing.
以下、本発明の一実施例を図面に基づいて説明
する。
Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明の一実施例である軸封・軸受試
験装置の概略構造を示す図である。同図におい
て、３２は供試体（軸封・軸受）であり、本装置
はこの供試体３２の特性を試験・測定するための
ものである。 FIG. 1 is a diagram showing a schematic structure of a shaft seal/bearing testing device that is an embodiment of the present invention. In the figure, 32 is a specimen (shaft seal/bearing), and this apparatus is for testing and measuring the characteristics of this specimen 32.
第１図において、２は軸封・軸受試験装置のケ
ーシングであり、該ケーシング２の内部に前記供
試体３２が固定されている。３１はこの供試体３
２を貫通する回転軸であり、該回転軸３１の両端
には回転軸１が設けられている。供試体３２の両
側のケーシング２内には固定子継鉄３と励磁コイ
ル４とを有するラジアル磁気軸受固定子５が固定
され、回転軸１にはこのラジアル磁気軸受固定子
５に対向す位置にラジアル磁気軸受回転子継鉄７
が固定されている。このラジアル磁気軸受固定子
５とラジアル磁気軸受回転子継鉄７でラジアル磁
気軸受を構成する。また、供試体３２の両側とラ
ジアル磁気軸受固定子５の間にはケーシング２と
回転軸３１の相対的変位を検出する変位センサ６
が設けられている。回転軸１の一端は橈み継ぎ手
４１を介して駆動機４０の回転軸に連結され、他
端にはスラスト磁気軸受回転子継鉄４１が固定さ
れ、このスラスト磁気軸受回転子継鉄１４を挾む
ようにスラスト磁気軸受固定電磁石１３，１３配
置され、該スラスト磁気軸受固定電磁石１３，１
３はケーシング２の内周に固定されている。ま
た、１６はケーシング２に取り付けられ、回転軸
３１とケーシング２の軸方向の相対的変位を検出
するスラスト変位センサである。 In FIG. 1, 2 is a casing of a shaft seal/bearing testing device, and the specimen 32 is fixed inside the casing 2. 31 is this specimen 3
2, and the rotating shaft 1 is provided at both ends of the rotating shaft 31. A radial magnetic bearing stator 5 having a stator yoke 3 and an excitation coil 4 is fixed in the casing 2 on both sides of the specimen 32, and a radial magnetic bearing stator 5 having a stator yoke 3 and an excitation coil 4 is fixed on the rotating shaft 1 at a position opposite to the radial magnetic bearing stator 5. Radial magnetic bearing rotor yoke 7
is fixed. The radial magnetic bearing stator 5 and the radial magnetic bearing rotor yoke 7 constitute a radial magnetic bearing. Further, a displacement sensor 6 is provided between both sides of the specimen 32 and the radial magnetic bearing stator 5 to detect the relative displacement between the casing 2 and the rotating shaft 31.
is provided. One end of the rotating shaft 1 is connected to the rotating shaft of the drive machine 40 via a radial joint 41, and a thrust magnetic bearing rotor yoke 41 is fixed to the other end. The thrust magnetic bearing fixed electromagnets 13, 13 are arranged so that the thrust magnetic bearing fixed electromagnets 13, 1
3 is fixed to the inner circumference of the casing 2. A thrust displacement sensor 16 is attached to the casing 2 and detects the relative displacement of the rotating shaft 31 and the casing 2 in the axial direction.
上記構造の軸封・軸受試験装置において、駆動
機４０と橈み継手４１により回転軸１を駆動し、
潤滑流体を潤滑流体供給孔３３から供試体３２と
回転軸３１との間の隙間に供給しながら、供試体
３２の両側に設けたラジアル磁気軸受固定子５と
ラジアル磁気軸受回転子継鉄７の間に作用する磁
気吸引力を制御して、供試体３２と回転軸３１の
間に並行運動やコニカル運動を発生させる。 In the shaft seal/bearing testing device having the above structure, the rotating shaft 1 is driven by the drive machine 40 and the radial joint 41,
While supplying lubricating fluid from the lubricating fluid supply hole 33 to the gap between the specimen 32 and the rotating shaft 31, the radial magnetic bearing stator 5 and the radial magnetic bearing rotor yoke 7 provided on both sides of the specimen 32 are connected. Parallel motion or conical motion is generated between the specimen 32 and the rotating shaft 31 by controlling the magnetic attraction force acting therebetween.
メカニカルシールの試験では、軸方向に相対運
動を発生させることも必要となる。この場合に
は、スラスト変位センサ１６の検出信号を基にス
ラスト磁気軸受回転子継鉄１４とスラスト磁気軸
受固定電磁石１６の間の磁気吸引力を制御して行
なう。 Mechanical seal testing also requires generating relative motion in the axial direction. In this case, the magnetic attraction force between the thrust magnetic bearing rotor yoke 14 and the thrust magnetic bearing fixed electromagnet 16 is controlled based on the detection signal of the thrust displacement sensor 16.
第２図はラジアル磁気軸受の制御回路を示すブ
ロツク図である。なお、スラスト磁気軸受の制御
回路の構成も同様の回路構成となる。 FIG. 2 is a block diagram showing a control circuit for a radial magnetic bearing. Note that the control circuit for the thrust magnetic bearing has a similar circuit configuration.
回転軸１の運動は変位センサ６により検出す
る。この検出信号と供試体３２において必要とす
る相対運動を発生するための信号を外部の信号発
生器２４で作り加算器２３で変位センサ６からの
検出信号に加算し、磁気軸受の位相補償回路２１
に導く。位相補償回路２１の出力にバイアス電流
のための信号VBを加算して、直線検波回路２２、
電力増幅器２６により、固定子継鉄３の励磁コイ
ル４に所定の電流を流すことによつて、回転軸１
と磁気軸受の相対運動を制御する。また、励磁コ
イル４の電流はフイードバツク用の微小抵抗２５
の電圧を測定して計測する。この微小抵抗２５の
電圧と変位センサ６からの出力から、ラジアル磁
気軸受の軸受反力を知ることができる。 The movement of the rotating shaft 1 is detected by a displacement sensor 6. This detection signal and a signal for generating the required relative motion in the specimen 32 are generated by an external signal generator 24 and added to the detection signal from the displacement sensor 6 by an adder 23.
lead to. A signal V B for bias current is added to the output of the phase compensation circuit 21, and a linear detection circuit 22,
By passing a predetermined current through the excitation coil 4 of the stator yoke 3 by the power amplifier 26, the rotating shaft 1 is
and controlling the relative motion of magnetic bearings. In addition, the current of the excitation coil 4 is controlled by a micro resistance 25 for feedback.
Measure the voltage by measuring the voltage. From the voltage of this microresistance 25 and the output from the displacement sensor 6, the bearing reaction force of the radial magnetic bearing can be determined.
上記のように本実施例によれば、変位センサ６
の検出出力に信号発生器２４らの外部信号を加算
器２３で加算し、ラジアル磁気軸受の目標値を変
化させることによつて、軸封・軸受試験装置の回
転軸３１を任意に制御できる。また、ラジアル磁
気軸受固定子５の励磁コイル４に流す励磁電流、
固定子継鉄３と励磁コイル４の隙間、磁気吸引力
の関係を予め検定しておくことにより、供試体３
２の軸受の反発力をラジアル磁気軸受の軸受反発
力として容易にできる。なお、説明は省略する
が、スラスト磁気軸受についても同様のことが言
える。 As described above, according to this embodiment, the displacement sensor 6
The rotary shaft 31 of the shaft seal/bearing testing device can be arbitrarily controlled by adding an external signal from the signal generator 24 or the like to the detection output by the adder 23 and changing the target value of the radial magnetic bearing. In addition, the excitation current flowing through the excitation coil 4 of the radial magnetic bearing stator 5,
By verifying the relationship between the gap between the stator yoke 3 and the excitation coil 4 and the magnetic attraction force in advance, the specimen 3
The repulsive force of the second bearing can be easily converted into the bearing repulsive force of the radial magnetic bearing. Although the explanation is omitted, the same can be said about the thrust magnetic bearing.
以上説明したように本発明によれば、下記のよ
うな優れた効果が得られる。
As explained above, according to the present invention, the following excellent effects can be obtained.
(1) 磁気軸受の変位センサの検出出力に相対運動
を模擬するための外部信号を加算し、磁気軸受
制御の目標値を変化させることによつて、軸
封・軸受試験装置の回転軸を簡単な構成で任意
に制御できる。(1) By adding an external signal to simulate relative motion to the detection output of the magnetic bearing displacement sensor and changing the target value for magnetic bearing control, the rotating shaft of the shaft seal/bearing testing device can be easily controlled. It can be controlled arbitrarily with a flexible configuration.
(2) 磁気軸受を構成する電磁石に流す励磁電流、
磁気軸受隙間、磁気吸引力の関係を予め検定し
ておくことにより、供試軸封・軸受の反発力を
磁気軸受の軸受反発力として容易にできる。(2) Excitation current flowing through the electromagnets that make up the magnetic bearing,
By verifying the relationship between the magnetic bearing gap and the magnetic attraction force in advance, the repulsive force of the shaft seal/bearing under test can be easily converted into the bearing repulsive force of the magnetic bearing.
従つて、本発明は構造で軸対・軸受試験装置を
実現できる。 Therefore, the structure of the present invention can realize a shaft pair/bearing testing device.
第１図は本発明の一実施例である軸封・軸受試
験装置の概略構造を示す図、第２図はラジアル磁
気軸受の制御回路を示すブロツク図である。
図中、１……回転軸、２……ケーシング、３…
…固定子継鉄、４……励磁コイル、５……ラジア
ル磁気軸受固定子、６……変位センサ、７……ラ
ジアル磁気軸受回転子継鉄、１３……スラスト磁
気軸受固定電磁石、１４……スラスト磁気軸受回
転子継鉄、１６……スラスト変位センサ、２１…
…位相補償回路、２２……直線検波回路、２３…
…加算器、２４……信号発生器、２５……フイー
ドバツク用微小抵抗、２６……電力増幅器、３１
……回転軸、３２……供試体、３３……潤滑流体
供給孔、４０……駆動機、４１……橈み継ぎ手。
FIG. 1 is a diagram showing a schematic structure of a shaft seal/bearing testing device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a control circuit for a radial magnetic bearing. In the figure, 1... rotating shaft, 2... casing, 3...
... Stator yoke, 4... Excitation coil, 5... Radial magnetic bearing stator, 6... Displacement sensor, 7... Radial magnetic bearing rotor yoke, 13... Thrust magnetic bearing fixed electromagnet, 14... Thrust magnetic bearing rotor yoke, 16... Thrust displacement sensor, 21...
...Phase compensation circuit, 22... Linear detection circuit, 23...
... Adder, 24 ... Signal generator, 25 ... Microscopic resistance for feedback, 26 ... Power amplifier, 31
... Rotating shaft, 32 ... Specimen, 33 ... Lubricating fluid supply hole, 40 ... Drive machine, 41 ... Radical joint.
Claims (1)
する回転軸に回転力を与え回転させ、該軸封・軸
受の特性を試験・測定する軸封、軸受試験装置に
おいて、 前記供試軸封・軸受を貫通する回転軸に固着し
た磁性材料製の回転子継鉄と、 該回転子継鉄から適切な隙間を設けて前記軸
封・軸受試験装置のケーシングに固定され且つ起
磁力を発生するコイルを備えた固定子電磁石と、 前記回転軸とケーシング間の相対変位を測定す
る変位センサと、 前記回転軸に所定の運動を与えるための外部信
号を該変位センサからの出力信号に加算する加算
器と、 該加算器からの出力信号をもとに前記回転子継
鉄と前記固定子電磁石との間に作用する磁気吸引
力を制御する補償回路と電力増幅器とを具備する
磁気軸受を設けたことを特徴とする軸封・軸受試
験装置。[Scope of Claims] 1. In a shaft seal/bearing testing device for testing and measuring the characteristics of a shaft seal/bearing by applying a rotational force to a rotating shaft passing through a shaft seal/bearing used in a rotating fluid machine and rotating it. , a rotor yoke made of a magnetic material that is fixed to the rotating shaft that passes through the shaft seal/bearing under test, and a rotor yoke that is fixed to the casing of the shaft seal/bearing testing device with an appropriate gap from the rotor yoke. and a stator electromagnet equipped with a coil that generates a magnetomotive force; a displacement sensor that measures the relative displacement between the rotating shaft and the casing; and an external signal from the displacement sensor for imparting a predetermined motion to the rotating shaft. An adder that adds to the output signal; a compensation circuit that controls the magnetic attraction force acting between the rotor yoke and the stator electromagnet based on the output signal from the adder; and a power amplifier. A shaft seal/bearing testing device characterized by being equipped with a magnetic bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8896590A JPH03287042A (en) | 1990-04-02 | 1990-04-02 | Testing device for shaft seal and bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8896590A JPH03287042A (en) | 1990-04-02 | 1990-04-02 | Testing device for shaft seal and bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03287042A JPH03287042A (en) | 1991-12-17 |
| JPH0571897B2 true JPH0571897B2 (en) | 1993-10-08 |
Family
ID=13957535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8896590A Granted JPH03287042A (en) | 1990-04-02 | 1990-04-02 | Testing device for shaft seal and bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03287042A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004021645A1 (en) * | 2004-05-03 | 2005-12-01 | Mecatronix Gmbh | Machine component test unit has contactless actuators with contactless sensors including actuator air gap magnetic flux sensors |
| CN102072251B (en) * | 2011-01-21 | 2012-11-28 | 南京航空航天大学 | Control device and control method for variable bias current of flexible rotors of magnetic suspension bearings |
| CN103471835B (en) * | 2013-09-18 | 2016-04-20 | 浙江工商大学 | Close tolerance seal proving installation under hot vacuum environment |
| CN104215460A (en) * | 2014-09-18 | 2014-12-17 | 浙江大学 | Magnetic resistance sensor for measuring vortex motion of rolling bearing retainer |
| CN106053068B (en) * | 2016-06-07 | 2019-01-29 | 浙江工业大学 | Power head experimental provision |
-
1990
- 1990-04-02 JP JP8896590A patent/JPH03287042A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03287042A (en) | 1991-12-17 |
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