JPS61104184A - Device for detecting abnormality of rotary compressor - Google Patents
Device for detecting abnormality of rotary compressorInfo
- Publication number
- JPS61104184A JPS61104184A JP22575984A JP22575984A JPS61104184A JP S61104184 A JPS61104184 A JP S61104184A JP 22575984 A JP22575984 A JP 22575984A JP 22575984 A JP22575984 A JP 22575984A JP S61104184 A JPS61104184 A JP S61104184A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- bearing
- rotor
- life
- bushing
- 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.)
- Granted
Links
Landscapes
- Rolling Contact Bearings (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はスクリュー圧縮機に係り、複数個の軸受で構成
された回転式スクリュー圧縮機のメンテナンスフリー化
に好適な軸受の異常検出に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a screw compressor, and more particularly to a method for detecting abnormality in a bearing suitable for making a rotary screw compressor composed of a plurality of bearings maintenance-free.
従来の回転圧縮機の軸受交換に関する整備基準は、製造
業社で設定した時間で管理していたため、使用者はその
時間に達したとき、まだ充分に使用に耐える軸受の状態
であっても製品保証責任等のかねあいから、交換せざる
を得ない状況にあり、交換に要する費用(部品代、交換
作業式)が短時間で発生する欠点があった。Conventional maintenance standards for replacing rotary compressor bearings were managed based on the time set by the manufacturer. Due to warranty liability, etc., there is no choice but to replace it, which has the disadvantage that the costs required for replacement (parts cost, replacement procedure) are incurred in a short period of time.
この種の装置としては、特開昭59−70895がある
。An example of this type of device is Japanese Patent Application Laid-Open No. 59-70895.
本発明の目的は、回転式圧縮機の軸受を定期的に交換す
る方法を解消し、軸受が圧縮機の機能を有する最大限の
寿命に至るまで使用できる信頼性の高い回転式圧縮機を
提供することにある。The purpose of the present invention is to eliminate the method of periodically replacing the bearings of a rotary compressor, and to provide a highly reliable rotary compressor that can be used for the maximum life of the bearing, which has the function of a compressor. It's about doing.
雄ロータと雌ロータで構成される回転圧縮機は4組の軸
受で構成される。その4組の軸受の寿命は各ロータの回
転数および圧縮行程で発生する荷重の分担荷重で決まっ
てくるものであるが、4組の軸受は理論上同一寿命で設
計することは困難であり、また圧縮機の使用条件である
負荷運転における吐出圧力、および無負荷運転における
圧力条件と頻度により、4組の軸受の寿命の長さは異な
ってくる。しかし上記いかなる運転状態においても4組
の軸受のうち設計計算でもとめた寿命時間は運転条件と
比例関係にあり、4組の軸受のうち最弱寿命の軸受はい
かなる運転条件においても他の軸受よりも最弱寿命とな
る。したがって4組の軸受のうち最弱寿命である軸受の
みに着目し、その軸受が回転圧縮機の機能を有しなくな
る限度に達するまで使用できれば、回転圧縮機の寿命の
とらえ方の上で、最も経済的な使用方法となる。A rotary compressor composed of a male rotor and a female rotor is composed of four sets of bearings. The lifespan of the four sets of bearings is determined by the rotational speed of each rotor and the shared load generated during the compression stroke, but it is theoretically difficult to design the four sets of bearings with the same lifespan. Furthermore, the length of life of the four sets of bearings differs depending on the discharge pressure in load operation, which is the operating condition of the compressor, and the pressure condition and frequency in no-load operation. However, under any of the above operating conditions, the life span determined by the design calculation among the four sets of bearings is proportional to the operating conditions. It also has the shortest lifespan. Therefore, if we focus only on the bearing with the weakest lifespan among the four sets of bearings and can use it until it reaches the limit where it no longer functions as a rotary compressor, then the best way to understand the lifespan of a rotary compressor is to This is an economical way to use it.
したがって、本発明では、上記最弱寿命となる軸受が寿
命に達した現象をとらえ、圧縮機を損傷することなく停
止し、その時点で軸受を交換すればよい、その現象をと
らえる手段として、軸受の摩耗により発生する軸振動を
ブツシュを摺動する摩擦熱の発生を温度センサーで異常
検出し1回転圧縮機を停止させるものである。Therefore, in the present invention, as a means to capture the phenomenon that the bearing with the weakest life has reached the end of its life, it is sufficient to stop the compressor without damaging it and replace the bearing at that point. A temperature sensor detects an abnormality in the shaft vibration caused by the wear of the bushes and the generation of frictional heat caused by the sliding of the bushes, and the compressor is stopped for one revolution.
以下、本発明の実施例を図により説明する。まず回転圧
縮機本体の構成について第1図を用いて説明する0回転
圧縮機は雄ロータ1および雌ロータ2のかみ合いによっ
て発生する容積がロータの回転によって縮小する原理を
応用した容積形圧縮゛ 機であり1両ロータはそれぞれ
軸受5,6および軸受7,8で支持されておリケーシン
グ3およびDケーシング4に内蔵されている。その他回
転圧縮機を構成する主な部品は圧縮機内と外気を遮断す
るメカニカルシール
カバ10、軸受箱内と外気とを遮断するベアリングカバ
11および雄ロータ9を駆動伝達する装置であるVプー
リ12である。Embodiments of the present invention will be described below with reference to the drawings. First, the structure of the rotary compressor main body will be explained using Fig. 1.The zero-rotation compressor is a positive displacement compressor that applies the principle that the volume generated by the meshing of the male rotor 1 and the female rotor 2 is reduced by the rotation of the rotors. Both rotors are supported by bearings 5 and 6 and bearings 7 and 8, respectively, and are housed in the recasing 3 and the D casing 4. Other main parts that make up the rotary compressor are a mechanical seal cover 10 that isolates the inside of the compressor from the outside air, a bearing cover 11 that isolates the inside of the bearing box from the outside air, and a V-pulley 12 that is a device that transmits drive to the male rotor 9. be.
第1図は本発明による実施例のなかで、4組で構成する
軸受のなかで最弱寿命である軸受4に近い軸の振れ回り
と軸方向の変化を検出する目的でブツシュ13と温度セ
ンサー14をDケーシング10に取付けた一例である。Figure 1 shows a bush 13 and a temperature sensor in an embodiment according to the present invention, which is close to bearing 4, which has the weakest life among the four sets of bearings, for the purpose of detecting whirling and changes in the axial direction of the shaft. 14 is attached to the D casing 10.
雄ロータ1が駆動機よりVプーリ12を介して駆動され
ると,雌ロータ2も雄ロータ1と噛合いなから回転する
。各4組の軸受が摩耗等の損失を受けていない新品の状
態では、通常開ロータは、 d軸方向および軸
直角方向の振動とも両振巾20μ以下の振動内で正常に
回転する。その状態では、第1図で示す雄ロータ1の軸
外径とDケーシング4の雄ロータ1の軸が挿入されてい
る部分の内径の片側ギャップδ、およびDケーシング4
と雄ロータ1の吐出側端面とのギャップδ3はそれぞれ
正規の寸法(通常δ□,δ,は数十ミクロン)を保たれ
ている。When the male rotor 1 is driven by the drive machine via the V-pulley 12, the female rotor 2 also rotates because it is not meshed with the male rotor 1. When each of the four sets of bearings is new and has not suffered losses such as wear, the normally open rotor rotates normally within vibration amplitudes of 20μ or less in both the d-axis direction and the axis-perpendicular direction. In this state, there is a one-sided gap δ between the outer diameter of the shaft of the male rotor 1 and the inner diameter of the portion of the D casing 4 into which the shaft of the male rotor 1 is inserted, as shown in FIG.
The gap δ3 between the male rotor 1 and the discharge side end face of the male rotor 1 is maintained at a regular size (normally δ□, δ are several tens of microns).
一方、回転式圧縮機を構成する4組の軸受のなかで,最
弱寿命である軸受5が長時間の運転で寿命に至った場合
には、その軸受自体のラジアルおよびアキシャルギャッ
プが大きくなることで、雄ロータはそのギャップに相当
する巾で軸方向および軸方向に変位しながら回転するこ
とになり、必然的にギャップδ,およびδ,は変化する
ことになる。ギャップδ1お,よびδ,が0に至る状態
になった場合は、軸とDケーシングは接触するため、焼
き付き、ついには致命的な焼損に至る。On the other hand, if bearing 5, which has the weakest life among the four sets of bearings that make up the rotary compressor, reaches the end of its life after long-term operation, the radial and axial gaps of the bearing itself will increase. Then, the male rotor rotates while being displaced in the axial direction and in the axial direction by a width corresponding to the gap, and the gaps δ and δ inevitably change. When the gaps δ1 and δ reach 0, the shaft and the D casing come into contact with each other, resulting in seizing and eventually fatal burnout.
Dケーシング4に、雄ロータ1の吐出側端面と軸に面す
るようにブツシュ13と温度センサー14を取付けた本
実施例第2図によれば、最弱寿命である軸受が摩耗状態
に至った場合、ブツシュ13の内径とDケーシング4に
挿入されている雄ロータ1の軸外径とのギャップδ2は
δ、寸法より小さく加工されており,同時に雄ロータ1
の吐出側端面とブツシュ13の端面とのギャップδ4は
雄ロータ1の吐出側端面とDケーシング4のギャップδ
,よりも小さく加工されているので、雄ロータ1の吐出
側端面および軸がDケーシング4に接触する前にブツシ
ュ13に接触する。その接触により摩耗熱が発生し、ブ
ツシュ13の温度は通常の正常な運転状態よりも高温に
達する。通常油冷式回転式空気圧縮機では、吐出し圧カ
フkgf/ =s& gの定常運転時においてブツシュ
13部分の温度は90℃で吐出し空気温度とほぼ同じ値
である。軸受の摩耗による異常時の場合は100℃以上
に達する。従ってその温度を温度センサー14で検出し
,圧縮機を未然に停止できるので、圧縮機が焼き付く等
の損焼が発生することなく、かつ、最弱寿命箇所である
軸受が有している最大限の時間まで、回転式圧縮機を信
頼性高く稼動することができる。一方前記油冷式回転式
空気圧縮機が油温上昇等により吐出空気温度が上昇した
場合は吐出空気温度リレー(通常95℃設定)が動作し
圧縮機を保護している。ブツシュ13の温度は軸受異常
が発生しない限り、吐出空気温度よりも低い値を示すも
のである。According to FIG. 2 of this embodiment, in which a bushing 13 and a temperature sensor 14 are attached to the D casing 4 so as to face the discharge side end face and shaft of the male rotor 1, the bearing at its weakest life has reached a worn state. In this case, the gap δ2 between the inner diameter of the bushing 13 and the outer diameter of the shaft of the male rotor 1 inserted in the D casing 4 is machined to be smaller than δ, and at the same time the male rotor 1
The gap δ4 between the discharge side end face of the male rotor 1 and the end face of the bushing 13 is the gap δ4 between the discharge side end face of the male rotor 1 and the D casing 4.
, the discharge side end face and shaft of the male rotor 1 contact the bushing 13 before contacting the D casing 4. The contact generates wear heat, and the temperature of the bushing 13 reaches a higher temperature than under normal operating conditions. In a normal oil-cooled rotary air compressor, during steady operation with a discharge pressure cuff kgf/=s&g, the temperature of the bush 13 is 90° C., which is approximately the same value as the discharge air temperature. In the case of abnormal conditions due to bearing wear, the temperature reaches 100°C or more. Therefore, the temperature can be detected by the temperature sensor 14 and the compressor can be stopped beforehand, so that the compressor does not suffer from burnout such as seizing, and the bearing, which is the weakest point of life, can reach its maximum potential. The rotary compressor can be operated reliably up to On the other hand, when the discharge air temperature of the oil-cooled rotary air compressor increases due to an increase in oil temperature, etc., a discharge air temperature relay (usually set at 95° C.) operates to protect the compressor. The temperature of the bush 13 exhibits a value lower than the discharge air temperature unless a bearing abnormality occurs.
なお、給油式回転圧縮機では、ブツシュ13部には潤滑
油が供給され、かつブツシュ材料が軸受材料であるので
、雄ロータ1の吐出側端面および軸表面が接触しても損
傷することはない、また潤滑油力プッシュ13部に供給
されないオイルフリ一式回転圧縮機では、ブツシュ13
の材料は雄ロータ1の軸が接触しても損失することのな
い自己潤滑性の材料(例えばカーボン、テフロン等)が
使用される。In addition, in the oil-supplied rotary compressor, lubricating oil is supplied to the bushing 13, and the bushing material is a bearing material, so even if the discharge side end face of the male rotor 1 and the shaft surface come into contact, there will be no damage. In addition, in an oil-free rotary compressor where lubricating oil is not supplied to the pushbutton 13,
A self-lubricating material (for example, carbon, Teflon, etc.) is used for the material, which does not cause loss even if the shaft of the male rotor 1 comes into contact with it.
以上のように、本発明によれば、最弱寿命である軸受の
摩耗等の損焼から発生する回転式圧縮機の機能をそこな
うことなく、最大限の寿命時間まで圧縮機を運転稼動で
きので、従来軸受の計算寿命時間の半分以下に設定して
いた定期的な軸受の交換時間を軸受固有の寿命まで延長
でき、かつ検出できるで1回転式圧縮機の寿命延長およ
びメンテナンスフリー化に有効であり、スクリュー圧縮
機のオーバホール回数の少なくなり、それにより発生す
る費用が縮減できるので経済的である。As described above, according to the present invention, the compressor can be operated to its maximum lifespan without impairing the functions of the rotary compressor caused by burnout such as wear of the bearings, which is the weakest part of the lifespan. , the periodic bearing replacement time, which was conventionally set to less than half of the calculated bearing life, can be extended to the bearing's own life, and detection is possible, making it effective in extending the life of single-rotation compressors and making them maintenance-free. This is economical because the number of overhauls of the screw compressor can be reduced and the costs incurred can be reduced accordingly.
さらに本発明で取付けるブツシュおよびセンサーは、最
弱寿命のベアリングのみに限定すればよいため、製品が
複雑化しない効果も有している。Furthermore, since the bushings and sensors to be attached in the present invention need only be limited to the bearings with the weakest lifespan, the product does not become complicated.
第1図は、本発明の一実施例のスクリュー圧縮機本体の
断面図、第2図は第1図の本発明に係る部分の拡大図で
ある。
1・・・雄ロータ、2・・・雌ロータ、3・・・ケーシ
ング、4・・・Dケーシング、5,6,7,8・・・軸
受、9・・・メカニカルシール、10・・・メカニカル
シールカバ。
11・・・ベアリングカバ、12・・・■プーリ、13
・・・ブツシュ、14・・・温度センサー。FIG. 1 is a sectional view of a screw compressor main body according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the portion of FIG. 1 relating to the present invention. DESCRIPTION OF SYMBOLS 1... Male rotor, 2... Female rotor, 3... Casing, 4... D casing, 5, 6, 7, 8... Bearing, 9... Mechanical seal, 10... Mechanical seal cover. 11...Bearing cover, 12...■Pulley, 13
...BUTSUSH, 14...Temperature sensor.
Claims (1)
するケーシングのなかで、最弱寿命となる軸受が挿入さ
れている位置で、ロータの吐出側端面とロータ軸表面の
二面に面する位置にブッシュを挿入し、そのブッシュに
温度センサーを設けた回転式圧縮機の異常検出装置。In a rotary compressor, this is the position where the bearing with the weakest life is inserted in the casing that supports multiple bearings, facing the discharge end of the rotor and the surface of the rotor shaft. An abnormality detection device for rotary compressors that has a bush inserted in the position and a temperature sensor attached to the bush.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22575984A JPH0718421B2 (en) | 1984-10-29 | 1984-10-29 | Abnormality detection device for rotary compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22575984A JPH0718421B2 (en) | 1984-10-29 | 1984-10-29 | Abnormality detection device for rotary compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61104184A true JPS61104184A (en) | 1986-05-22 |
JPH0718421B2 JPH0718421B2 (en) | 1995-03-06 |
Family
ID=16834368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22575984A Expired - Lifetime JPH0718421B2 (en) | 1984-10-29 | 1984-10-29 | Abnormality detection device for rotary compressor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0718421B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100681477B1 (en) * | 1998-04-21 | 2007-02-09 | 아뜰리에 부쉬 에스.아. | Positive displacement machine |
DE102007011733A1 (en) * | 2007-03-10 | 2008-09-11 | Ab Skf | Operating method for a worm/screw compressor with a rotor uses an arrangement of bearings in a casing while fitting the rotor in a defined axial position in relation to the casing |
JP2009293593A (en) * | 2008-06-09 | 2009-12-17 | Mitsubishi Electric Corp | Screw compressor and its maintenance method |
WO2010046976A1 (en) * | 2008-10-22 | 2010-04-29 | 株式会社前川製作所 | Refueling screw compressor |
JP2011144783A (en) * | 2010-01-18 | 2011-07-28 | Kobe Steel Ltd | Screw compressor |
CN116086763A (en) * | 2023-03-20 | 2023-05-09 | 中国航空工业集团公司沈阳空气动力研究所 | Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device |
-
1984
- 1984-10-29 JP JP22575984A patent/JPH0718421B2/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100681477B1 (en) * | 1998-04-21 | 2007-02-09 | 아뜰리에 부쉬 에스.아. | Positive displacement machine |
DE102007011733A1 (en) * | 2007-03-10 | 2008-09-11 | Ab Skf | Operating method for a worm/screw compressor with a rotor uses an arrangement of bearings in a casing while fitting the rotor in a defined axial position in relation to the casing |
DE102007011733B4 (en) * | 2007-03-10 | 2009-01-02 | Ab Skf | Method of operating a compressor and compressor |
JP2009293593A (en) * | 2008-06-09 | 2009-12-17 | Mitsubishi Electric Corp | Screw compressor and its maintenance method |
WO2010046976A1 (en) * | 2008-10-22 | 2010-04-29 | 株式会社前川製作所 | Refueling screw compressor |
JP5426565B2 (en) * | 2008-10-22 | 2014-02-26 | 株式会社前川製作所 | Lubricated screw compressor |
US9115714B2 (en) | 2008-10-22 | 2015-08-25 | Mayekawa Mfg. Co., Ltd. | Screw compressor having lubricating oil system |
JP2011144783A (en) * | 2010-01-18 | 2011-07-28 | Kobe Steel Ltd | Screw compressor |
CN116086763A (en) * | 2023-03-20 | 2023-05-09 | 中国航空工业集团公司沈阳空气动力研究所 | Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device |
CN116086763B (en) * | 2023-03-20 | 2023-06-06 | 中国航空工业集团公司沈阳空气动力研究所 | Large continuous wind tunnel axial flow compressor bearing overhauling method and overhauling device |
Also Published As
Publication number | Publication date |
---|---|
JPH0718421B2 (en) | 1995-03-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |