JPH0139971Y2 - - Google Patents
Info
- Publication number
- JPH0139971Y2 JPH0139971Y2 JP1984160317U JP16031784U JPH0139971Y2 JP H0139971 Y2 JPH0139971 Y2 JP H0139971Y2 JP 1984160317 U JP1984160317 U JP 1984160317U JP 16031784 U JP16031784 U JP 16031784U JP H0139971 Y2 JPH0139971 Y2 JP H0139971Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotating shaft
- ring
- rotating
- sliding
- mechanical seal
- 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
- 238000001816 cooling Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、軸封技術に係るメカニカルシールの
冷却装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling device for a mechanical seal related to shaft sealing technology.
従来より、メカニカルシールとして、第５図に
示すようなものが汎用されている。すなわち、１
は機器ハウジング、２はゴム等弾性材にて製せら
れたパツキン３を介して前記ハウジング１内周に
嵌着固定された固定環、４は回転軸５の外側にゴ
ム等弾性材にて製せられたパツキン６を介して嵌
着された回転環、７は内周端部が前記回転軸５の
段部５′に固定されるとともに、外周部より軸と
平行な方向に延び、前記回転環４の外周縁に形成
された係合切欠４′と係合してなる係合突起７′を
有する金属製のケース、８は該金属ケース７に後
端を担持されて前記回転環４を押圧せしめるコイ
ルスプリングである。したがつて前記回転環４は
前記回転軸５の駆動力が前記ケース７を介して伝
達されるとともに後背面を前記コイルスプリング
８にて押圧されることにより、前記固定環２と摺
動し、該両環２，４の摺動部９にてシール対象液
Ａを密封するようになるものである。
Conventionally, a mechanical seal as shown in FIG. 5 has been widely used. That is, 1
2 is a device housing, 2 is a fixed ring fitted and fixed to the inner circumference of the housing 1 through a packing 3 made of an elastic material such as rubber, and 4 is a fixed ring made of an elastic material such as rubber on the outside of the rotating shaft 5. The rotating ring 7, which is fitted through the attached gasket 6, has an inner peripheral end fixed to the stepped portion 5' of the rotating shaft 5, and extends from the outer peripheral part in a direction parallel to the shaft. A metal case 8 has an engagement protrusion 7' that engages with an engagement notch 4' formed on the outer peripheral edge of the ring 4, and a metal case 8 has a rear end supported by the metal case 7 and rotates the rotating ring 4. It is a coil spring that presses. Therefore, the rotating ring 4 slides on the fixed ring 2 as the driving force of the rotating shaft 5 is transmitted through the case 7 and the rear surface is pressed by the coil spring 8. The liquid A to be sealed is sealed at the sliding portions 9 of the rings 2 and 4.
上記構成によれば、前記摺動部９に発生した摺
動熱は、図において矢印にて示したように、前記
両環２，４内を伝導してゆき、空気Ｂ、シール対
象液Ａ、ハウジング１および回転軸５等へ放熱さ
れる。 According to the above configuration, the sliding heat generated in the sliding portion 9 is conducted through the rings 2 and 4 as shown by the arrows in the figure, and is transferred to the air B, the liquid to be sealed A, Heat is radiated to the housing 1, rotating shaft 5, etc.
しかしながら、上記放熱は充分に行なわれては
おらず、従来においては雰囲気温度の上昇を招い
ていた。とくに、カークーラー用コンプレツサに
おいては、メカニカルシール近傍部の空間がコン
パクトに設計されているため、空間Ｂへの放熱が
行なわれ難く、場合によつてはシール対象液Ａの
温度が150℃以上まで上昇することがある。この
ため該シール対象液Ａが劣化し、メカニカルシー
ルの摺動部９に介在する。該シール対象液Ａの液
膜の潤滑効果が低下し、摺動部９の早期摩耗の要
因となつているばかりでなく、コンプレツサの各
摺動部の摩耗をもたらすようになる問題点を有し
ていた。
However, the heat dissipation described above has not been carried out sufficiently, and conventionally this has caused an increase in the ambient temperature. In particular, in compressors for car coolers, the space near the mechanical seal is designed to be compact, making it difficult for heat to be radiated to space B, and in some cases, the temperature of liquid A to be sealed may reach 150°C or higher. It may rise. For this reason, the liquid A to be sealed deteriorates and becomes interposed in the sliding portion 9 of the mechanical seal. The lubricating effect of the liquid film of the liquid A to be sealed is reduced, which not only causes early wear of the sliding parts 9 but also causes wear of each sliding part of the compressor. was.
本考案は、上記問題点に鑑み、摺動熱の放熱を
効率よく行なつてメカニカルシールのシール寿命
を長久化せしめることを目的として案出されたも
のである。 The present invention was devised in view of the above-mentioned problems, with the purpose of extending the seal life of a mechanical seal by efficiently dissipating the heat of sliding.
上記目的を達成するため、本考案メカニカルシ
ールの冷却装置は、メカニカルシールを外装する
回転軸の外周面における前記メカニカルシールの
摺動部近傍位置にねじ溝を螺刻するとともに、該
回転軸に前記摺動部の内周側空間と連通する中空
部を形成して冷却空気を流し、この冷却空気は前
記回転環の内周面の前側部分を通過して流れてい
るものである。
In order to achieve the above object, the cooling device for a mechanical seal of the present invention has a threaded groove formed on the outer circumferential surface of the rotating shaft surrounding the mechanical seal at a position near the sliding part of the mechanical seal, and A hollow portion communicating with the inner circumferential space of the sliding portion is formed to allow cooling air to flow, and this cooling air passes through the front portion of the inner circumferential surface of the rotary ring.
本考案によれば、回転軸が回転駆動すると、該
回転軸外周面に螺刻されたねじ溝のポンピング作
用により、空気が活発に流動するようになり、さ
らに詳しく説明すると、回転軸の中空部より、該
回転軸の外周空間（メカニカルシールの内周空
間）へ向かう流れもしくは、該外周空間より前記
中空部へ向かう流れが誘起せしめられ、該空気の
流動によりメカニカルシールの摺動部に発生した
摺動熱は効率的に放散されるようになり、この空
冷作用によりメカニカルシールの雰囲気温度の異
常な上昇は回避される。そして、冷却空気は回転
環の前端面だけでなく内周面の前側部分を通過し
て流れているので、回転環は広い範囲で冷却空気
によつて冷却される。
According to the present invention, when the rotating shaft is driven to rotate, air actively flows due to the pumping action of the thread grooves threaded on the outer peripheral surface of the rotating shaft. This induces a flow toward the outer circumferential space of the rotating shaft (inner circumferential space of the mechanical seal) or a flow toward the hollow portion from the outer circumferential space. The heat of sliding is efficiently dissipated, and this air cooling action prevents an abnormal rise in the ambient temperature of the mechanical seal. Since the cooling air flows not only through the front end surface of the rotary ring but also through the front portion of the inner circumferential surface, the rotary ring is cooled over a wide range by the cooling air.
以下、本考案の好ましい一実施例を図面につい
て詳細に説明する。第１図は本実施例の使用状態
を示す説明図、第２図は同一部切欠した説明図で
ある。図において、既述第６図の従来例と同じ構
成になる部分については同一の符号を付してあ
り、すなわち１はハウジング、２は固定環、３は
パツキン、４は回転環、５は回転軸、６はパツキ
ン、７はケース、８はコイルスプリング、そして
９は前記固定環２と前記回転環４との摺動部であ
る。前記回転環５には中空部１０が刳貫されてお
り、該中空部１０は、通気孔１１により、該回転
軸５と前記両環２，４との間の空間と連通してい
る。さらに、前記両環２，４の摺動部９の内径側
近傍になる前記回転軸５の外周面には、ねじ溝１
２が螺刻されている。
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing the usage state of this embodiment, and FIG. 2 is an explanatory view with a portion of the same partially cut away. In the figure, the parts having the same configuration as the conventional example shown in FIG. 6 are given the same reference numerals, that is, 1 is the housing, 2 is the fixed ring, 3 is the packing, 4 is the rotary ring, and 5 is the rotary ring. 6 is a packing, 7 is a case, 8 is a coil spring, and 9 is a sliding portion between the fixed ring 2 and the rotating ring 4. A hollow portion 10 is bored through the rotating ring 5, and the hollow portion 10 communicates with the space between the rotating shaft 5 and the rings 2 and 4 through a ventilation hole 11. Furthermore, a thread groove 1 is provided on the outer peripheral surface of the rotating shaft 5 near the inner diameter side of the sliding portion 9 of the rings 2 and 4.
2 is stamped.
上記構成において、回転軸５が図上矢印ａ方向
に回転すると、その駆動力はケース７を経て回転
環４に伝達され、該回転環４が回転して固定環２
と摺動する。該摺動により摺動部９に発生した摺
動熱は、両環２，４内を、第２図の細い矢印ｂに
て示すごとく伝わつてゆく。また、回転軸５が矢
印ａ方向に回転すると、その外周面に螺刻された
ねじ溝１２のポンピング作用により、該ねじ溝１
２の外側において、図上右側へ向かつて空気Ｂが
流動し、これに伴ない、中空部１０から通気孔１
１を経て前記ねじ溝１２の外側空間へ空気Ｂが流
動し、すなわち第２図において太い矢印Ｃにて示
したごとき空気Ｂの流れが誘起される。これによ
り、摺動部９に発生した摺動熱は効率よく除去さ
れ、シール対象液Ａの異常上昇による劣化を防止
し、よつて摺動部９および当該メカニカルシール
を装着したコンプレツサ等機器の摺動部（図示せ
ず）の摩耗を低減するようになる。 In the above configuration, when the rotating shaft 5 rotates in the direction of the arrow a in the figure, its driving force is transmitted to the rotating ring 4 through the case 7, and the rotating ring 4 rotates, causing the fixed ring to
and slide. The sliding heat generated in the sliding portion 9 due to the sliding is transmitted within the rings 2 and 4 as shown by the thin arrow b in FIG. Further, when the rotating shaft 5 rotates in the direction of arrow a, the pumping action of the thread groove 12 threaded on the outer peripheral surface causes the thread groove 1 to
2, air B flows toward the right side in the figure, and along with this, air B flows from the hollow part 10 to the ventilation hole 1.
1 to the outer space of the thread groove 12, that is, a flow of air B as shown by the thick arrow C in FIG. 2 is induced. As a result, the sliding heat generated in the sliding part 9 is efficiently removed, preventing deterioration due to an abnormal rise in the liquid A to be sealed, and thereby preventing the sliding part 9 and the sliding of equipment such as a compressor equipped with the mechanical seal. This reduces wear on moving parts (not shown).
なお、第３図ないし第５図は、いずれも本実施
例による冷却装置を使用したメカニカルシール
と、従来のメカニカルシールとの比較試験を行な
つた結果を表わすグラフである。 Note that FIGS. 3 to 5 are graphs showing the results of a comparative test between a mechanical seal using the cooling device according to this embodiment and a conventional mechanical seal.
まず第３図は、下記の条件による摺動面の温度
測定試験の結果を表わす。 First, FIG. 3 shows the results of a sliding surface temperature measurement test under the following conditions.
〈条件〉
回転数Ｎ：6500r.p.m
圧力Ｐ ：16Kg／cm2Ｇ
シール対象液：ダフニーハーメチツク90X＋
Ｒ−12
測定位置：固定環の摺動面より１mm内方位置
つぎに第４図は、下記の条件による固定環の摺
動面の摩耗量の測定試験の結果を表わし、さらに
第５図は、同下記の条件によるシール対象液の漏
洩試験の結果を表わす。<Conditions> Rotation speed N: 6500r.pm Pressure P: 16Kg/cm 2 G Seal target liquid: Daphne Hermetic 90X+
R-12 Measurement position: 1 mm inward from the sliding surface of the fixed ring Next, Figure 4 shows the results of a measurement test of the amount of wear on the sliding surface of the fixed ring under the following conditions, and Figure 5 shows , represents the results of a leakage test of the liquid to be sealed under the following conditions.
〈条件〉
回転数Ｎ：6500r.p.m
圧力Ｐ ：16Kg／cm2Ｇ
シール対象液：ダフニーハーメチツク90X＋
Ｒ−12
時間 Ｔ：300hrs
〔考案の効果〕
以上の試験結果からも明らかなように、本考案
メカニカルシールの冷却装置は、回転軸にメカニ
カルシールの内周空間に連通する中空部を形成す
るとともに、該回転軸外周面にねじ溝を螺刻し、
該回転軸の回転に伴なう前記ねじ溝のポンピング
作用により、空冷作用を行なう空気の流れを生起
せしめるよう構成したもので、これにより摺動熱
を効率よく除去して雰囲気温度の異常上昇を防止
し、メカニカルシールおよび当該メカニカルシー
ルを装着した機器の摺動部の摩耗を低減してシー
ル性能を向上せしめ、メカニカルシールの長寿命
化を図るものである。そして、回転環は広い範囲
で冷却空気によつて冷却されるので、このような
効果はさらに大きくなる。<Conditions> Rotation speed N: 6500r.pm Pressure P: 16Kg/cm 2 G Seal target liquid: Daphne Hermetic 90X+
R-12 Time T: 300hrs [Effect of the invention] As is clear from the above test results, the cooling device for the mechanical seal of the invention forms a hollow part in the rotating shaft that communicates with the inner peripheral space of the mechanical seal, and , a thread groove is carved on the outer peripheral surface of the rotating shaft,
The device is constructed so that the pumping action of the thread groove accompanying the rotation of the rotating shaft generates a flow of air that performs an air cooling action, thereby efficiently removing the heat of sliding and preventing an abnormal rise in ambient temperature. The purpose is to improve seal performance by preventing wear on mechanical seals and the sliding parts of devices equipped with the mechanical seals, and to extend the life of mechanical seals. Since the rotating ring is cooled by the cooling air over a wide range, this effect becomes even greater.
第１図は本考案の一実施例の使用状態を示す説
明図、第２図は同一部切欠した説明図、第３図な
いし第５図は試験結果を表わすグラフ、第６図は
従来のメカニカルシールを示す説明図である。
２……固定環、４……回転環、５……回転軸、
９……摺動部、１０……中空部、１１……通気
孔、１２……ねじ溝、Ｂ……空気。
Fig. 1 is an explanatory diagram showing the usage state of one embodiment of the present invention, Fig. 2 is an explanatory diagram with the same part cut away, Figs. 3 to 5 are graphs showing test results, and Fig. 6 is a conventional mechanical It is an explanatory view showing a seal. 2... Fixed ring, 4... Rotating ring, 5... Rotating shaft,
9...Sliding part, 10...Hollow part, 11...Vent hole, 12...Thread groove, B...Air.
Claims (1)
転環と、ハウジング内周に嵌着された固定環とが
密接摺動するメカニカルシールにおいて、前記回
転軸の外周面における前記回転環と前記固定環と
の摺動部近傍位置に、ねじ溝を螺刻するととも
に、該回転軸に前記摺動部の内周側空間に連通す
る中空部を形成して冷却空気を流し、該冷却空気
は前記回転環の内周面の前側部分を通過して流れ
ていることを特徴とするメカニカルシールの冷却
装置。 In a mechanical seal in which a rotating ring fixed to a rotating shaft side and rotating according to the rotating shaft and a fixed ring fitted on an inner circumference of a housing closely slide, the rotating ring on the outer peripheral surface of the rotating shaft and A thread groove is formed in the vicinity of the sliding part with the fixed ring, and a hollow part is formed in the rotary shaft to communicate with the inner space of the sliding part to allow cooling air to flow. A cooling device for a mechanical seal, wherein the flow passes through a front portion of an inner circumferential surface of the rotating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984160317U JPH0139971Y2 (en) | 1984-10-25 | 1984-10-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984160317U JPH0139971Y2 (en) | 1984-10-25 | 1984-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6175557U JPS6175557U (en) | 1986-05-21 |
| JPH0139971Y2 true JPH0139971Y2 (en) | 1989-11-30 |
Family
ID=30718240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984160317U Expired JPH0139971Y2 (en) | 1984-10-25 | 1984-10-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0139971Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5706760B2 (en) * | 2011-06-03 | 2015-04-22 | イーグル工業株式会社 | mechanical seal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110052Y2 (en) * | 1979-11-20 | 1986-04-01 | ||
| JPS58109662U (en) * | 1982-01-22 | 1983-07-26 | 株式会社東芝 | Shaft seal cooling device |
-
1984
- 1984-10-25 JP JP1984160317U patent/JPH0139971Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6175557U (en) | 1986-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6029980A (en) | Fluid side contamination exclusion sealing lip for radial shaft seals | |
| GB1515560A (en) | Fluid coupling | |
| JPH07208610A (en) | Oil seal | |
| JPH0139971Y2 (en) | ||
| US3512790A (en) | Sealing devices for rotating parts | |
| US5149106A (en) | Lip seal device | |
| JP2001317637A (en) | Shaft seal mechanism for compressor by mechanical seal | |
| JPS6322371Y2 (en) | ||
| JPH0557525U (en) | Lip seal | |
| JPH026302Y2 (en) | ||
| US20200332896A1 (en) | Seal structure and seal to be used in same | |
| JP2003240131A (en) | Sealing device | |
| JPH0723654Y2 (en) | Lip seal | |
| JPH08145189A (en) | Sealing device | |
| US3976341A (en) | Seal | |
| JPS6323652Y2 (en) | ||
| JP2545725Y2 (en) | mechanical seal | |
| JPH0448381Y2 (en) | ||
| JPS5810048Y2 (en) | Shaft sealing device | |
| JPH07780Y2 (en) | mechanical seal | |
| JPS6110051Y2 (en) | ||
| JPS6318047B2 (en) | ||
| JP2570192Y2 (en) | Oil seal device | |
| SU1065641A1 (en) | Sealing collar | |
| JPH0526339Y2 (en) |