JPS6324295Y2 - - Google Patents
Info
- Publication number
- JPS6324295Y2 JPS6324295Y2 JP1984086764U JP8676484U JPS6324295Y2 JP S6324295 Y2 JPS6324295 Y2 JP S6324295Y2 JP 1984086764 U JP1984086764 U JP 1984086764U JP 8676484 U JP8676484 U JP 8676484U JP S6324295 Y2 JPS6324295 Y2 JP S6324295Y2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- refrigerant
- gasket
- packing
- rubber
- 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
- 229920001971 elastomer Polymers 0.000 claims description 23
- 239000003507 refrigerant Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 238000012856 packing Methods 0.000 claims description 12
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010726 refrigerant oil Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 125000004773 chlorofluoromethyl group Chemical group [H]C(F)(Cl)* 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/38—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member sealed by a packing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Description
【考案の詳細な説明】
〔考案の目的〕
（産業上の利用分野）
本考案は、冷媒を使用する機器類における密封
装置に関するものである。[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a sealing device for equipment that uses a refrigerant.
（従来の技術ならびにその問題点）
従来、冷媒を使用する機器類、たとえば各種エ
アコンデイシヨニング装置、冷凍機等の各種シス
テムには多数の密封装置が使用されており、回転
用軸封装置としてはメカニカルシールが、固定用
密封装置としてはゴム製Ｏリングまたはパツキン
グが使用され、またこれらＯリング等の材質は各
システムに使用される冷媒および潤滑油の種類、
雰囲気温度の組み合わせなどを考慮して選定され
る。たとえば、高温雰囲気用としては特殊弗素ゴ
ム材を、フレオンＲ−22（CHClF2）などの低温
雰囲気用としてはネオプレン製ゴム等を使用して
いる。しかし、近年コンプレツサ等の高効率化、
省資源等を目的として各種ゴム部材の配置される
冷媒雰囲気条件がフレオンガスの変更、雰囲気温
度の上昇、システム内の圧力変動等により厳しく
なつている。また重ねて冷媒はきわめて透過性の
強いガスであり、ゴム材に対しても浸透し易いた
めにゴム材の劣化現象が生じる。たとえば、冷媒
液中に浸漬されたゴム材の劣化現象としては、硬
化、収縮、膨潤および発泡、亀裂等があり、中で
も発泡、亀裂はシール機能を致命的に破壊するも
のであり、現在、耐熱性、耐油性、耐冷媒性、耐
密封性を兼備するゴム材は存在しないのが実態で
あり、上記のいずれかに対して妥協して使用して
いる。(Prior art and its problems) Conventionally, a large number of sealing devices have been used in various systems such as equipment that uses refrigerants, such as various air conditioning devices and refrigerators. A mechanical seal is used, and a rubber O-ring or packing is used as a fixed sealing device, and the material of these O-rings etc. depends on the type of refrigerant and lubricant used in each system,
Selection is made taking into consideration the combination of ambient temperature, etc. For example, a special fluoro rubber material is used for high-temperature atmospheres, and neoprene rubber such as Freon R-22 (CHClF 2 ) is used for low-temperature environments. However, in recent years, compressors, etc. have become more efficient,
In order to save resources, the refrigerant atmosphere conditions in which various rubber members are placed have become stricter due to changes in Freon gas, increases in ambient temperature, pressure fluctuations within the system, etc. Additionally, the refrigerant is a highly permeable gas and easily permeates into the rubber material, causing deterioration of the rubber material. For example, the deterioration phenomena of rubber materials immersed in refrigerant liquid include hardening, shrinkage, swelling, foaming, and cracking, among which foaming and cracking can fatally destroy the sealing function. The reality is that there is no rubber material that has all of the properties of hardness, oil resistance, refrigerant resistance, and sealing resistance, and is used by compromising on any of the above.
本考案は、ゴム材に発泡、亀裂が発生する主原
因が、冷媒の浸透による膨潤、収縮等の劣化現象
と、ゴム雰囲気中の急激な圧力低下により、ゴム
に浸透している前記冷媒の急激な膨張が相乗した
場合にあるという点に注目し、冷媒等を用いる機
器類において、密封装置内のゴム材へ冷媒雰囲気
中の急激な圧力変動がおよぶのを防止し、ゴム材
の発泡および亀裂の発生を防止するとともに、耐
熱ゴム材の使用を可能とする密封装置を提供する
ことを目的とするものである。 The present invention proposes that the main causes of foaming and cracking in rubber materials are deterioration phenomena such as swelling and shrinkage caused by the penetration of a refrigerant, and a sudden drop in pressure in the rubber atmosphere. In order to prevent foaming and cracking of the rubber material, we have focused on the fact that this phenomenon occurs when the expansion of the rubber material is compounded. The object of the present invention is to provide a sealing device that prevents the occurrence of heat-resistant rubber materials and allows the use of heat-resistant rubber materials.
（問題点を解決するための手段ならびにその作
用）
上記目的を達成するための手段たる本考案密封
装置は、ゴム製のＯリングまたはパツキングの冷
媒側前面に、耐油性および耐冷媒性の優れたテフ
ロン製等の断面楔状のガスケツトを楔着して前記
Ｏリングまたはパツキングと複合して設置すると
ともに、該ガスケツトを、前記Ｏリングまたはパ
ツキング側へ向けて押圧する機構を有するもので
ある。すなわち、該ガスケツトは前記のごとく断
面楔状になるため、背面よりこれを押圧すること
によりその内周側および外周側に当接している２
部材間に強固に楔着される。したがつてその密封
機能は著しく向上し、ゴム材へ冷媒の浸透を極小
に抑制するとともに、冷媒雰囲気の圧力変動がゴ
ム材へおよぶのを防止する作用を有するものであ
る。
(Means for Solving the Problems and Their Effects) The sealing device of the present invention, which is a means for achieving the above object, has a rubber O-ring or packing on the front surface of the refrigerant side that has excellent oil resistance and refrigerant resistance. A gasket made of Teflon or the like having a wedge-shaped cross section is wedged and installed in combination with the O-ring or packing, and has a mechanism for pressing the gasket toward the O-ring or packing. That is, since the gasket has a wedge-shaped cross section as described above, by pressing it from the back side, the gasket contacts the inner and outer circumferential sides.
It is firmly wedged between the members. Therefore, its sealing function is significantly improved, and it has the effect of suppressing the penetration of the refrigerant into the rubber material to a minimum and preventing pressure fluctuations in the refrigerant atmosphere from reaching the rubber material.
（実施例）
以下、本考案に係る密封装置の実施例を図面に
もとづいて詳細に説明する。第１図は本考案の第
１の実施例を示し、１は冷媒を使用する機器類の
コンプレツサに使用されるメカニカルシールであ
り、ハウジング２にゴム材製のＯリング３を介し
て固定された固定環４と、シヤフト５に金属ベロ
ーズ６を介して固定され、該シヤフトとともに回
転する回転環７との密着摺接によつて、当該メカ
ニカルシール１の外周空間ａに封入された冷媒お
よび潤滑油の回転部における漏洩を阻止するもの
である。前記ベローズ６は上述のとうり回転環７
をシヤフト５側に固定するほか、該回転環７を固
定環４に押圧せしめ、さらに該回転環７とシヤフ
ト５間を密封する機能を果たしている。同様に、
前記Ｏリング３はハウジング２に固定環４を固定
するとともに、該両部材２，４間を密封する機能
を果たしている。そして該Ｏリング３の冷媒側前
面に位置するハウジング２の軸孔開孔部のテーパ
面８と固定環４との間に断面楔形になるガスケツ
ト９が装着され、該ガスケツト９はガスケツトホ
ルダ１０を介し、ボルト１１の締結力により前記
Ｏリング３側へ向けて押圧されているため、前記
テーパ面８と固定環４との間に強固に楔着するも
ので、その密封機能はきわめて高いものとなつて
いる。したがつて、該ガスケツト９は冷媒等が流
入してＯリング３を浸漬するのを阻止するととも
に、コンプレツサの駆動が停止して冷媒等が封入
されている当該メカニカルシール１の外周空間ａ
の圧力が急激に低下しても、その影響がＯリング
３におよぶのを防止する作用を果たしている。つ
ぎに、第２図は、本考案密封装置の第２の実施例
を示すメカニカルシール１′であり、上記第１の
実施例と異なる点について述べると、ガスケツト
９の、Ｏリング３側への押圧を、金属ベローズ６
の弾発力を利用して固定環４′外周に形成した押
圧段部１２により行なう構造としたものであり、
この場合、固定環４′は、該固定環４′自体がガス
ケツト９を押圧するものであるため軸方向摺動可
能な状態に装着されていなければならず、１３は
そのために設けられた空間で、また、１４は固定
環４′の回り止めのためのノツクピンである。(Example) Hereinafter, an example of the sealing device according to the present invention will be described in detail based on the drawings. FIG. 1 shows a first embodiment of the present invention, in which 1 is a mechanical seal used in compressors for equipment that uses refrigerant, and is fixed to a housing 2 via an O-ring 3 made of rubber material. The refrigerant and lubricating oil sealed in the outer circumferential space a of the mechanical seal 1 due to the close sliding contact between the fixed ring 4 and the rotating ring 7 which is fixed to the shaft 5 via a metal bellows 6 and rotates together with the shaft. This prevents leakage in the rotating parts of the pipe. The bellows 6 is a rotating ring 7 as described above.
In addition to fixing the rotary ring 7 to the shaft 5 side, it also functions to press the rotary ring 7 against the fixed ring 4 and to seal the space between the rotary ring 7 and the shaft 5. Similarly,
The O-ring 3 serves to fix the fixed ring 4 to the housing 2 and also to seal between the two members 2 and 4. A gasket 9 having a wedge-shaped cross section is installed between the fixed ring 4 and the tapered surface 8 of the shaft hole opening of the housing 2 located on the front surface of the O-ring 3 on the refrigerant side. Since it is pressed toward the O-ring 3 side by the fastening force of the bolt 11, it is firmly wedged between the tapered surface 8 and the fixed ring 4, and its sealing function is extremely high. It is becoming. Therefore, the gasket 9 prevents the refrigerant etc. from flowing in and immersing the O-ring 3, and when the drive of the compressor is stopped, the outer circumferential space a of the mechanical seal 1 filled with the refrigerant etc.
Even if the pressure suddenly decreases, the effect is prevented from reaching the O-ring 3. Next, FIG. 2 shows a mechanical seal 1' showing a second embodiment of the sealing device of the present invention. Press the metal bellows 6
This structure utilizes the elastic force of the pressing step 12 formed on the outer periphery of the fixed ring 4'.
In this case, since the fixed ring 4' itself presses the gasket 9, it must be installed so that it can slide in the axial direction, and 13 is a space provided for this purpose. , and 14 is a knock pin for preventing rotation of the fixed ring 4'.
なお、上述した第１および第２の実施例は、い
ずれも回転用軸封装置であるメカニカルシールに
ついて本考案を実施したものであるが、固定用密
封装置についても本考案を実施し、すなわち断面
楔状のガスケツトをゴム製のＯリングまたはパツ
キングの冷媒側前面に設置し、該ガスケツトを前
記Ｏリングまたはパツキング側へ向けて押圧し、
楔着せしめる構成とすることが可能であることは
言うまでもない。 In the first and second embodiments described above, the present invention was implemented for a mechanical seal which is a rotary shaft sealing device, but the present invention was also implemented for a fixed sealing device. A wedge-shaped gasket is installed on the front surface of the refrigerant side of a rubber O-ring or packing, and the gasket is pressed toward the O-ring or packing,
Needless to say, it is possible to use a wedge-shaped configuration.
以上述べたように、本考案密封装置は、回転用
軸封装置および固定用密封装置のゴム製のＯリン
グまたはパツキングの冷媒側前面に、耐油性、耐
冷媒性の断面楔状のガスケツトを設置し、該ガス
ケツトを前記Ｏリングまたはパツキング側へ向け
て押圧する機構を設けることにより、該ガスケツ
トの密封機能を向上せしめ、前記Ｏリングまたは
パツキングが冷媒および潤滑油に浸漬し、また圧
力変動の影響を受けてゴム材の劣化現象とくにそ
の密封機能を破壊する発泡、亀裂等が発生するの
を防止するもので、併わせて耐熱ゴム材の使用、
たとえば、従来冷媒フレオンＲ−22に対して高温
用弗素ゴム等は使用不可能とされて来たが、これ
が可能となるなど、ゴム材の選択範囲を拡大する
ものであり、本考案はきわめて大なる実用的効果
を奏するものである。
As described above, the sealing device of this invention is a device that installs an oil-resistant, refrigerant-resistant gasket with a wedge-shaped cross section on the refrigerant-side front surface of the rubber O-ring or packing of a rotary shaft seal device and a stationary seal device, and provides a mechanism for pressing the gasket toward the O-ring or packing side, thereby improving the sealing function of the gasket and preventing the O-ring or packing from being immersed in the refrigerant and lubricating oil and being affected by pressure fluctuations, which causes deterioration of the rubber material, in particular the occurrence of bubbles and cracks that destroy its sealing function. In addition, the use of heat-resistant rubber,
For example, it has been previously thought that high temperature fluorine rubber could not be used with the refrigerant Freon R-22, but this has now become possible, expanding the range of rubber materials that can be selected, and the present device has an extremely large practical effect.
第１図は本考案密封装置の第１の実施例を示す
メカニカルシールの半裁断面図、第２図は同第２
の実施例を示すメカニカルシールの半裁断面図で
ある。
１……メカニカルシール、２……ハウジング、
３……Ｏリング、４，４′……固定環、５……シ
ヤフト、６……ベローズ、７……回転環、９……
ガスケツト、１０……ガスケツトホルダ、１１…
…ボルト、１２……押圧段部。
Fig. 1 is a half-cut sectional view of a mechanical seal showing the first embodiment of the sealing device of the present invention, and Fig.
FIG. 2 is a half-cut sectional view of a mechanical seal showing an example. 1... Mechanical seal, 2... Housing,
3...O-ring, 4,4'...fixed ring, 5...shaft, 6...bellows, 7...rotating ring, 9...
Gasket, 10...Gasket holder, 11...
...Bolt, 12...Press step.
Claims (1)
ゴム製のＯリングまたはパツキングの冷媒側前面
に、耐油性および耐冷媒性の優れたテフロン製等
の断面楔状のガスケツトを楔着して前記Ｏリング
またはパツキングと複合して設置するとともに、
該ガスケツトを、前記Ｏリングまたはパツキング
側へ向けて押圧する機構を有することを特徴とす
る密封装置。 In refrigerant sealing devices for equipment that uses refrigerants,
A gasket with a wedge-shaped cross section made of Teflon or the like having excellent oil resistance and refrigerant resistance is wedged on the front surface of the rubber O-ring or packing on the refrigerant side, and is installed in combination with the O-ring or packing.
A sealing device characterized by having a mechanism for pressing the gasket toward the O-ring or packing side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984086764U JPS614067U (en) | 1984-06-13 | 1984-06-13 | sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984086764U JPS614067U (en) | 1984-06-13 | 1984-06-13 | sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS614067U JPS614067U (en) | 1986-01-11 |
| JPS6324295Y2 true JPS6324295Y2 (en) | 1988-07-04 |
Family
ID=30638371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984086764U Granted JPS614067U (en) | 1984-06-13 | 1984-06-13 | sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS614067U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134215A (en) * | 1980-03-21 | 1981-10-20 | Kureha Chem Ind Co Ltd | Conjugated filament |
-
1984
- 1984-06-13 JP JP1984086764U patent/JPS614067U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134215A (en) * | 1980-03-21 | 1981-10-20 | Kureha Chem Ind Co Ltd | Conjugated filament |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS614067U (en) | 1986-01-11 |
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