JP2001123988A - Shaft seal device of turbo refregirating machine - Google Patents
Shaft seal device of turbo refregirating machineInfo
- Publication number
- JP2001123988A JP2001123988A JP29918499A JP29918499A JP2001123988A JP 2001123988 A JP2001123988 A JP 2001123988A JP 29918499 A JP29918499 A JP 29918499A JP 29918499 A JP29918499 A JP 29918499A JP 2001123988 A JP2001123988 A JP 2001123988A
- Authority
- JP
- Japan
- Prior art keywords
- mechanical seal
- shaft
- speed shaft
- sealing device
- pressure side
- 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
Landscapes
- Mechanical Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ターボ冷凍機の軸
封装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft sealing device for a centrifugal chiller.
【０００２】[0002]
【従来の技術】原動機で低速軸を回転させ、増速機構で
あるギヤピニオンを介して高速軸を増速し、高速回転す
る羽根車により冷媒を圧縮するターボ冷凍機において
は、モータ，ギヤピニオン，圧縮機がすべて高圧な冷媒
ガスの雰囲気中内にあるものもしくは、低速軸に軸封装
置を設け低速軸の一部およびモータ（原動機）を大気に
開放しているものが一般的である。この場合「ターボ冷
凍機」（高田秋一著 日本冷凍協会）Ｐ１５８〜Ｐ１６
２の例に示されるように軸シールの構造は高圧側の冷媒
を回収しないと軸シールのメンテナンスができないもの
である。2. Description of the Related Art In a centrifugal chiller in which a low speed shaft is rotated by a prime mover, a high speed shaft is increased through a gear pinion as a speed increasing mechanism, and a refrigerant is compressed by an impeller rotating at a high speed, a motor, a gear pinion, and a compression device are used. In general, all the machines are in an atmosphere of high-pressure refrigerant gas, or a machine in which a shaft sealing device is provided on a low-speed shaft to open a part of the low-speed shaft and a motor (motor) to the atmosphere. In this case, "Turbo refrigerator" (Akiichi Takada, Japan Refrigeration Association) P158-P16
As shown in the second example, the structure of the shaft seal cannot maintain the shaft seal without collecting the refrigerant on the high pressure side.
【０００３】[0003]
【発明が解決しようとする課題】このような高圧の冷媒
側と低圧の大気側遮断する軸封装置は接触型の軸封装置
であるがゆえ経年的な劣化が生じるため、定期的な交換
が必要となる。交換作業は前記のように冷媒を一時回収
して行うか、もしくは付加的な機構を設けて高圧側と低
圧側を遮断してから行うため、その装置は大変複雑とな
り、コストが増大する。Since such a shaft sealing device for shutting off the high pressure refrigerant side and the low pressure atmosphere side is a contact type shaft sealing device, it deteriorates over time. Required. As described above, the replacement operation is performed by temporarily recovering the refrigerant, or after an additional mechanism is provided to shut off the high-pressure side and the low-pressure side, so that the apparatus becomes very complicated and the cost increases.
【０００４】よって、本発明の目的は、高速軸に軸封装
置であるメカニカルシールを設け、そのメンテナンスお
よび交換を冷媒を抜出さずに容易に行え、かつ安価な軸
封装置を提供する。Accordingly, an object of the present invention is to provide an inexpensive shaft sealing device in which a mechanical seal as a shaft sealing device is provided on a high-speed shaft, and maintenance and replacement thereof can be easily performed without extracting refrigerant.
【０００５】[0005]
【課題を解決するための手段】この発明の軸封装置は、
高圧側と低圧側を遮断する際の付加的な部品、機構を用
いることなく高圧側と低圧側を軸封せしめることができ
る。The shaft sealing device according to the present invention comprises:
The high-pressure side and the low-pressure side can be sealed without using an additional component or mechanism for shutting off the high-pressure side and the low-pressure side.
【０００６】すなわち、高速軸に設けられているスラス
ト軸受を取外すと高速軸は冷媒側の高圧ガスにより押さ
れ、メカニカルシールハウジングと高速軸の間に設けら
れたＯリングを押圧し、高圧側と低圧側を遮断する。こ
れによって、メカニカルシールおよび軸受を交換する
際、冷媒を抜出さずにメンテナンスが可能で、かつその
装置は簡単な構造のためイニシャルコスト，メンテナン
スコスト下げるという面で非常に優れている。That is, when the thrust bearing provided on the high-speed shaft is removed, the high-speed shaft is pushed by the high-pressure gas on the refrigerant side, and presses the O-ring provided between the mechanical seal housing and the high-speed shaft. Shut off low pressure side. Thus, when replacing the mechanical seal and the bearing, maintenance can be performed without extracting the refrigerant, and the apparatus is very excellent in terms of reducing initial costs and maintenance costs due to its simple structure.
【０００７】[0007]
【発明の実施の形態】以下に、この発明の実施の形態
を、図面に示すところに基づいて説明する。図１にター
ボ冷凍機の圧縮機とモータの断面図を示す。運転中はメ
カニカルシールにより高圧側（冷媒側）と低圧側（大気
側）が遮断されている。よって、モータ１および増速機
構であるギヤ３，ピニオン４は大気圧中で運転が可能で
あるためモータを空気冷却できる点やギヤ、ピニオンの
風損が低減できる点で優れている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a compressor and a motor of a turbo refrigerator. During operation, the high pressure side (refrigerant side) and the low pressure side (atmosphere side) are shut off by a mechanical seal. Therefore, since the motor 1 and the gear 3 and the pinion 4 as the speed increasing mechanism can be operated at the atmospheric pressure, the motor 1 is excellent in that the motor can be air-cooled and the gear and the pinion can be reduced in windage.
【０００８】図２に図１において円で囲まれている部分
の軸封装置の詳細図を示す。第１の発明に記載の軸封装
置はメカニカルシール２１，２２，回転環２３，メカニ
カルシールハウジング２４，Ｏリング２５，固定リング
２６，ナット２７，スペーサ２９からなる。メカニカル
シール２１，２２は固定リング２６およびスペーサ２９
によってメカニカルシールハウジング２４に取り付けら
れている。FIG. 2 shows a detailed view of the shaft sealing device in a portion surrounded by a circle in FIG. The shaft sealing device according to the first invention comprises a mechanical seal 21, 22, a rotating ring 23, a mechanical seal housing 24, an O-ring 25, a fixing ring 26, a nut 27, and a spacer 29. The mechanical seals 21 and 22 include a fixing ring 26 and a spacer 29.
To the mechanical seal housing 24.
【０００９】高速軸２０の高圧側からのスラスト力は、
スラスト軸受２８によって抑えられている。メンテナン
スの際、スラスト軸受２８を取外すと高速軸２０は高圧
である冷媒と低圧である大気の圧力差によってメカニカ
ルシールハウジング２４側へと押され、メカニカルシー
ルハウジング２４と高速軸２０の間に設けられたＯリン
グ２５を押圧することによって高圧側と低圧側を遮断す
る。The thrust force from the high pressure side of the high speed shaft 20 is
It is suppressed by the thrust bearing 28. At the time of maintenance, when the thrust bearing 28 is removed, the high-speed shaft 20 is pushed toward the mechanical seal housing 24 by the pressure difference between the high-pressure refrigerant and the low-pressure atmosphere, and is provided between the mechanical seal housing 24 and the high-speed shaft 20. By pressing the O-ring 25, the high-pressure side and the low-pressure side are shut off.
【００１０】このとき、メカニカルシールの固定環２３
も高速軸２０と同時に押され、メカニカルシール２１の
弾性部は伸び、メカニカルシール２２の弾性部は縮むこ
とになるが、メカニカルシール２２の弾性部を長く設け
ることにより可能としている。At this time, the stationary ring 23 of the mechanical seal
Also, the elastic part of the mechanical seal 21 is expanded and the elastic part of the mechanical seal 22 is contracted, and the elastic part of the mechanical seal 22 is contracted. This is made possible by providing the elastic part of the mechanical seal 22 long.
【００１１】第２の発明に記載の軸封装置を図３に図示
する。請求項１の軸封装置において、スラスト軸受３８
を取外し軸が振れ、Ｏリング３５の押圧力が弱くなるこ
とによる冷媒ガスの漏洩を防ぐため高速軸３０とメカニ
カルシールハウジング３４の勘合部はそれぞれテーパ加
工を施しており、軸の振れを防いでいる。The shaft sealing device according to the second invention is shown in FIG. The thrust bearing (38) according to claim 1, wherein
In order to prevent the leakage of the refrigerant gas due to the shaft being removed and the pressing force of the O-ring 35 becoming weak, the fitting portion between the high-speed shaft 30 and the mechanical seal housing 34 is tapered to prevent the shaft from running. I have.
【００１２】第３の発明に記載の軸封装置は、第１発明
の軸封装置図２においてメカニカルシール２１，２２お
よび軸受の交換が終わると、スラスト軸受２８を取付け
る作業だけで、高速軸２０とメカニカルシールハウジン
グ２４の接触部が離れ、再び冷凍機としての運転が可能
となる。In the shaft sealing device according to the third aspect of the present invention, the replacement of the mechanical seals 21 and 22 and the bearings in the shaft sealing device of the first aspect of the invention shown in FIG. The contact portion of the mechanical seal housing 24 and the mechanical seal housing 24 is separated, and the operation as a refrigerator can be performed again.
【００１３】[0013]
【発明の効果】以上のように、第１および第２の発明に
よれば、気密を保つための付加的な部品、装置が必要で
なく、ただスラスト軸受２８を取外すことによって、高
圧ガスによるスラスト力を利用し高速軸２０移動させ、
Ｏリング２５を押圧し、高圧側と低圧側を遮断する構造
にしたことにより、部品点数を減らすことが可能で、か
つメンテナンスの際にかかる時間、コストを大幅に削減
する効果がある。As described above, according to the first and second aspects of the present invention, additional components and devices for maintaining airtightness are not required, and the thrust by the high-pressure gas can be obtained simply by removing the thrust bearing 28. Using the force to move the high-speed axis 20,
The structure in which the O-ring 25 is pressed to shut off the high-pressure side and the low-pressure side can reduce the number of parts, and has the effect of greatly reducing the time and cost required for maintenance.
【００１４】また、第３の発明によれば、スラスト軸受
３８を取付ける作業によって高速軸３０とメカニカルシ
ールハウジング３４の接触が離れるため、高速軸３０と
メカニカルシールハウジング３４が接触したまま冷凍機
を運転してしまう心配はない。According to the third aspect of the present invention, since the contact between the high-speed shaft 30 and the mechanical seal housing 34 is released by the operation of mounting the thrust bearing 38, the refrigerator is operated while the high-speed shaft 30 and the mechanical seal housing 34 are in contact with each other. Don't worry about doing it.
【図１】本発明のターボ冷凍機全体を示す断面図であ
る。FIG. 1 is a cross-sectional view showing the entire turbo refrigerator of the present invention.
【図２】図１の発明の実施の形態による高速軸の軸封装
置の要部を示す断面図である。FIG. 2 is a sectional view showing a main part of a shaft sealing device for a high-speed shaft according to the embodiment of the invention in FIG. 1;
【図３】発明の他の実施の形態による高速軸の軸封装置
の要部を示す断面図である。FIG. 3 is a sectional view showing a main part of a shaft sealing device for a high-speed shaft according to another embodiment of the present invention.
１…モータ、２…圧縮機ケーシング、３…ギヤ、４…ピ
ニオン、５，２０，３０…高速軸、６…インペラ、７…
容量制御弁、８…コントロールモータ、２１，３１…メ
カニカルシール（高速側）、２２，３２…メカニカルシ
ール(低速側)、２３，３３…回転環、２４，３４…メカ
ニカルシールハウジング（密封兼支持用）、２５，３５
…Ｏリング、２６，３６…固定リング、２７，３７…ナ
ット、２８，３８…スラスト軸受、２９，３９…スペー
サ。DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Compressor casing, 3 ... Gear, 4 ... Pinion, 5, 20, 30 ... High speed shaft, 6 ... Impeller, 7 ...
Capacity control valve, 8: control motor, 21, 31: mechanical seal (high-speed side), 22, 32: mechanical seal (low-speed side), 23, 33: rotating ring, 24, 34: mechanical seal housing (for sealing and supporting) ), 25, 35
... O-rings, 26, 36 ... fixing rings, 27, 37 ... nuts, 28, 38 ... thrust bearings, 29, 39 ... spacers.
フロントページの続き Ｆターム(参考） 3H022 AA02 BA06 CA01 CA04 CA15 CA19 CA23 CA28 CA40 CA57 CA59 CA60 DA07 DA08 DA11 DA16 DA20 3J041 AA03 BA04 DA12 DA16 Continued on the front page F term (reference) 3H022 AA02 BA06 CA01 CA04 CA15 CA19 CA23 CA28 CA40 CA57 CA59 CA60 DA07 DA08 DA11 DA16 DA20 3J041 AA03 BA04 DA12 DA16
Claims (3)
カルシールを、冷媒を抜出すことなく交換可能な軸封装
置において、前記メカニカルシールを支持するためのハ
ウジングと高圧側と低圧側を遮断するためのＯリングを
装備した密封用ハウジングとを兼ねたメカニカルシール
ハウジングと、高圧の冷媒ガスによるスラスト力を抑え
るスラスト軸受と、前記スラスト軸受を取外した際に、
高圧の冷媒ガスによりメカニカルシールハウジングの方
向に移動する高速軸と、前記高速軸が移動する際に、そ
の移動距離分の伸縮が可能なメカニカルシールと、を備
えることを特徴とするターボ冷凍機の軸封装置。1. A high-pressure side and a low-pressure side of a housing for supporting a mechanical seal are shut off in a shaft sealing device capable of replacing a mechanical seal provided on a high-speed shaft of a turbo refrigerator without extracting refrigerant. A mechanical seal housing that also serves as a sealing housing equipped with an O-ring, a thrust bearing that suppresses thrust force due to high-pressure refrigerant gas, and when the thrust bearing is removed,
A turbo chiller, comprising: a high-speed shaft that moves in the direction of a mechanical seal housing by high-pressure refrigerant gas; and a mechanical seal that can expand and contract by the moving distance when the high-speed shaft moves. Shaft sealing device.
高速軸の振れを防止するため、高速軸とメカニカルシー
ル勘合部にテーパ加工を施していることを特徴とする軸
封装置。2. The shaft sealing device according to claim 1, wherein the high-speed shaft and a mechanical seal fitting portion are tapered to prevent the high-speed shaft from swaying.
ニカルシールおよび軸受の交換作業が終了後、スラスト
軸受を取付ける作業で高速軸とメカニカルシールハウジ
ングとの接触が外れることを特徴とする軸封装置。3. The shaft sealing device according to claim 1, wherein after the operation of replacing the mechanical seal and the bearing is completed, the contact between the high-speed shaft and the mechanical seal housing is released by the operation of installing the thrust bearing. Sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29918499A JP2001123988A (en) | 1999-10-21 | 1999-10-21 | Shaft seal device of turbo refregirating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29918499A JP2001123988A (en) | 1999-10-21 | 1999-10-21 | Shaft seal device of turbo refregirating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001123988A true JP2001123988A (en) | 2001-05-08 |
Family
ID=17869242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29918499A Pending JP2001123988A (en) | 1999-10-21 | 1999-10-21 | Shaft seal device of turbo refregirating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001123988A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365887B2 (en) | 2002-07-10 | 2008-04-29 | Ricoh Company, Ltd. | Image sensor unit |
| CN101680551B (en) * | 2007-07-06 | 2012-12-26 | 伊格尔工业股份有限公司 | Mechanical seal device |
| CN102889387A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Graphite oil seal device |
| KR101370773B1 (en) | 2013-10-11 | 2014-03-06 | 지용규 | The mechanical seal |
-
1999
- 1999-10-21 JP JP29918499A patent/JP2001123988A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7365887B2 (en) | 2002-07-10 | 2008-04-29 | Ricoh Company, Ltd. | Image sensor unit |
| CN101680551B (en) * | 2007-07-06 | 2012-12-26 | 伊格尔工业股份有限公司 | Mechanical seal device |
| CN102889387A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Graphite oil seal device |
| KR101370773B1 (en) | 2013-10-11 | 2014-03-06 | 지용규 | The mechanical seal |
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