JP2000337518A - Sealing-up device - Google Patents
Sealing-up deviceInfo
- Publication number
- JP2000337518A JP2000337518A JP11149255A JP14925599A JP2000337518A JP 2000337518 A JP2000337518 A JP 2000337518A JP 11149255 A JP11149255 A JP 11149255A JP 14925599 A JP14925599 A JP 14925599A JP 2000337518 A JP2000337518 A JP 2000337518A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- screw groove
- flow
- check valve
- sealing device
- 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
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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、密封装置に係り、
更に詳しくは、相手部材に摺動自在に密接するシール部
にネジ溝を設けた密封装置に関するものである。TECHNICAL FIELD The present invention relates to a sealing device,
More specifically, the present invention relates to a sealing device provided with a thread groove in a seal portion slidably contacting a mating member.
【０００２】[0002]
【従来の技術】従来から、図５に示すように、樹脂製の
シールリップ５１を有し、このシールリップ５１の、軸
（図示せず）の周面に摺動自在に密接するシール部５２
にネジ溝５３を設けた密封装置が知られている。ネジ溝
５３は、軸の回転時にポンピング作用を発揮してネジ溝
５３内の密封流体を大気側から密封流体側へ押し戻すも
のであるが、軸の静止時に密封流体がネジ溝５３を伝っ
て漏れることがある。したがって従来は、同図に示すよ
うに、ネジ溝５３内に堰止め部５４を設けて軸の静止時
における密封流体の漏れを防いでいるが、このようにネ
ジ溝５３内に堰止め部５４を設けると、密封流体側から
大気側への流れの他に反対向きの大気側から密封流体側
への流れをも堰き止めてしまうために、これが上記ポン
ピング作用に係るポンプ能力を低下させる原因となって
いる。2. Description of the Related Art Conventionally, as shown in FIG. 5, a seal lip 51 made of resin is provided, and a seal portion 52 of the seal lip 51 is slidably in close contact with a peripheral surface of a shaft (not shown).
A sealing device provided with a thread groove 53 is known. The thread groove 53 exerts a pumping action when the shaft rotates, and pushes the sealing fluid in the thread groove 53 back from the atmosphere side to the sealing fluid side. When the shaft is stationary, the sealing fluid leaks along the thread groove 53. Sometimes. Therefore, conventionally, as shown in the figure, a blocking portion 54 is provided in the thread groove 53 to prevent leakage of the sealing fluid when the shaft is stationary. Is provided, in addition to the flow from the sealed fluid side to the atmosphere side, in addition to blocking the flow from the opposite atmosphere side to the sealed fluid side, this causes a decrease in the pumping ability related to the pumping action. Has become.
【０００３】[0003]
【発明が解決しようとする課題】本発明は以上の点に鑑
み、相手部材に摺動自在に密接するシール部にネジ溝を
設けた密封装置において、静止時に密封流体がネジ溝を
伝って漏れるのを防止するとともに回転時にネジ溝が十
分なポンプ能力を発揮し、もって優れたシール性能を発
揮することが可能な密封装置を提供することを目的とす
る。SUMMARY OF THE INVENTION In view of the above, the present invention is directed to a sealing device having a thread groove in a seal portion slidably in close contact with a mating member. It is an object of the present invention to provide a sealing device capable of preventing the occurrence of the above-mentioned problem and exhibiting a sufficient pumping ability at the time of rotation by a thread groove, thereby exhibiting excellent sealing performance.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するた
め、本発明の請求項１による密封装置は、相手部材に摺
動自在に密接するシール部にネジ溝を設けた密封装置に
おいて、大気側から密封流体側への流れを許容するとと
もに反対向きの流れを遮断する逆流防止弁を前記ネジ溝
内に設けたことを特徴とするものである。In order to achieve the above object, a sealing device according to a first aspect of the present invention is a sealing device provided with a thread groove in a sealing portion slidably in close contact with a mating member. A check valve is provided in the screw groove to allow a flow from the fluid to the sealed fluid side and to block a flow in the opposite direction.
【０００５】また、本発明の請求項２による密封装置
は、上記した請求項１の密封装置において、ネジ溝の底
面に固定または一体成形した板状の弁体によって逆流防
止弁を形成したことを特徴とするものである。According to a second aspect of the present invention, there is provided a sealing device according to the first aspect, wherein a check valve is formed by a plate-shaped valve body fixed or integrally formed on the bottom surface of the thread groove. It is a feature.
【０００６】上記構成を備えた本発明の請求項１による
密封装置のように、大気側から密封流体側への流れを許
容するとともに反対向きの流れを遮断する逆流防止弁が
ネジ溝内に設けられると、この逆流防止弁による逆止弁
作用によって、ネジ溝内の密封流体が大気側から密封流
体側へ流れることのみが許容され、反対向きに密封流体
側から大気側へ流れるのが遮断されることになる。逆流
防止弁の構造には様々な態様が考えられるが、請求項２
に記載したように、ネジ溝の底面に固定または一体成形
した板状の弁体によって逆流防止弁を形成するのが、製
作ないし成形の容易性を確保することができることか
ら、好適である。As in the sealing device according to the first aspect of the present invention having the above-mentioned structure, a check ring is provided in the thread groove to allow the flow from the atmosphere side to the sealed fluid side and to shut off the flow in the opposite direction. When this is done, only the sealing fluid in the thread groove is allowed to flow from the atmosphere side to the sealing fluid side by the check valve action of the check valve, and the flow of the sealing fluid from the sealing fluid side to the atmosphere side in the opposite direction is blocked. Will be. There are various aspects of the structure of the check valve.
As described in (1), it is preferable to form the check valve by a plate-shaped valve element fixed or integrally formed on the bottom surface of the thread groove, because the easiness of manufacture or molding can be ensured.
【０００７】[0007]
【発明の実施の形態】つぎに本発明の実施形態を図面に
したがって説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【０００８】図１は、当該実施形態に係る密封装置の半
裁断面を示しており、その要部拡大斜視図が図２に示さ
れている。FIG. 1 shows a half section of the sealing device according to the embodiment, and FIG. 2 is an enlarged perspective view of a main part thereof.
【０００９】図１に示すように、当該実施形態に係る密
封装置（ネジシールまたはネジ溝シールとも称する）は
先ず、金属製の取付環１を有しており、この取付環１に
ゴム状弾性材製の外周シール部２が焼付け接着されると
ともに、取付環１の内周側にＰＴＦＥ等よりなる樹脂製
のシールリップ（樹脂リップとも称する）３が保持され
ており、このシールリップ３の、摺動の相手部材である
軸１０（図４参照）の周面１０ａに摺動自在に密接する
シール部４に螺旋状のネジ溝５が一本または複数本貫通
形成されており、この各ネジ溝５内に、装着時における
大気側ｘから密封流体側ｙへの流れ（吸い込み方向の流
れ）を許容するとともに反対向きの密封流体側ｙから大
気側ｘへの流れ（漏れ方向の流れ）を遮断する逆流防止
弁６が一箇所または複数箇所設けられており、図２に拡
大して示すように、この各逆流防止弁６が、ネジ溝５の
底面５ａに固定された板状の弁体７によって形成されて
いる。As shown in FIG. 1, the sealing device (also referred to as a screw seal or a thread groove seal) according to the embodiment first has a metal mounting ring 1, and the mounting ring 1 is provided with a rubber-like elastic material. A seal lip (also referred to as a resin lip) 3 made of PTFE or the like is held on the inner peripheral side of the mounting ring 1, and the seal lip 3 is slid. One or a plurality of helical screw grooves 5 are formed in a seal portion 4 slidably in close contact with a peripheral surface 10a of a shaft 10 (see FIG. 4) which is a moving partner member. 5 allows the flow (flow in the suction direction) from the atmosphere side x to the sealed fluid side y at the time of mounting, and blocks the flow (flow in the leak direction) from the sealed fluid side y to the atmosphere side x in the opposite direction. Check valve 6 It provided a plurality of locations, as shown enlarged in FIG. 2, the respective check valve 6 is formed by a plate-shaped valve body 7 fixed to the bottom surface 5a of the screw groove 5.
【００１０】逆流防止弁６は、軸１０の回転時に開き、
軸１０の停止時に閉まる機能を持つ開閉式のストッピン
グポイントであって、以下のように構成されている。The check valve 6 opens when the shaft 10 rotates,
An opening / closing type stopping point having a function of closing when the shaft 10 stops, and is configured as follows.
【００１１】すなわち先ず、この逆流防止弁６は、ネジ
溝５の底面５ａのみに固定された板状のものとして形成
されている。また図３に示すように、この逆流防止弁６
のネジ溝５深さ方向の寸法（高さ）ｈは、装着時にこの
逆流防止弁６が軸１０の周面１０ａに対して周方向に引
っ掛かるように、ネジ溝５の深さｄよりも大きく形成さ
れている（ｈ＞ｄ）。また図４に示すように、当該密封
装置の内周に軸１０を挿入するときは、この逆流防止弁
６が軸１０回転時に吸い込み方向の密封流体（油等の液
体）の流れに逆らわずに倒れるとともに（同図
（Ａ））、軸１０停止時に漏れ方向の密封流体の流れに
よって起こされて、軸１０の周面１０ａに押し付けられ
るように設定する（同図（Ｂ））。That is, first, the check ring 6 is formed as a plate fixed to only the bottom surface 5a of the screw groove 5. Also, as shown in FIG.
Of the thread groove 5 in the depth direction (height) h is larger than the depth d of the thread groove 5 so that the check valve 6 is caught in the circumferential direction with respect to the peripheral surface 10a of the shaft 10 at the time of mounting. (H> d). As shown in FIG. 4, when the shaft 10 is inserted into the inner periphery of the sealing device, the check ring 6 does not go against the flow of the sealing fluid (liquid such as oil) in the suction direction when the shaft 10 rotates. When the shaft 10 falls down ((A) in the figure), it is set so as to be caused by the flow of the sealing fluid in the leak direction when the shaft 10 stops and pressed against the peripheral surface 10a of the shaft 10 ((B) in the figure).
【００１２】上記構成を備えた密封装置によれば、上記
したように大気側ｘから密封流体側ｙへの流れを許容す
るとともに反対向きの密封流体側ｙから大気側ｘへの流
れを遮断する逆流防止弁６がネジ溝５内に設けられてい
るために、この逆流防止弁６による逆止弁作用によっ
て、ネジ溝５内の密封流体が大気側ｘから密封流体側ｙ
へ流れることのみが許容され、反対向きに密封流体側ｙ
から大気側ｘへ流れるのが遮断される。したがってこの
逆流防止弁６の備える方向性によって、軸１０の静止時
に密封流体がネジ溝５を伝って漏れるのを有効に防止す
ることができるとともに、軸１０の回転時にはネジ溝５
に十分なポンプ能力（吸い込みポンプ能力）を発揮させ
ることができる。According to the sealing device having the above configuration, as described above, the flow from the atmosphere side x to the sealed fluid side y is allowed, and the flow from the opposite sealed fluid side y to the atmosphere side x is shut off. Since the check ring 6 is provided in the thread groove 5, the check fluid in the screw groove 5 is changed from the atmosphere side x to the seal fluid side y by the check valve action of the check ring 6.
To the sealed fluid side y
To the atmosphere x. Therefore, the directionality of the check ring 6 can effectively prevent the sealing fluid from leaking along the screw groove 5 when the shaft 10 is at rest, and at the same time the screw groove 5 can rotate when the shaft 10 rotates.
Sufficient pump capacity (suction pump capacity).
【００１３】また、ネジ溝５の底面５ａに固定された板
状の弁体７によって逆流防止弁６が形成されているため
に、当該逆流防止弁６ないし樹脂製シールリップ３の製
作ないし成形が容易である。Further, since the check valve 6 is formed by the plate-shaped valve element 7 fixed to the bottom surface 5a of the thread groove 5, the check valve 6 or the resin seal lip 3 can be manufactured or molded. Easy.
【００１４】[0014]
【発明の効果】本発明は、以下の効果を奏する。The present invention has the following effects.
【００１５】すなわち先ず、上記構成を備えた本発明の
請求項１による密封装置においては、相手部材に摺動自
在に密接するシール部にネジ溝を設けた密封装置におい
て、大気側から密封流体側への流れを許容するとともに
反対向きの流れを遮断する逆流防止弁がネジ溝内に設け
られているために、この逆流防止弁による逆止弁作用に
よって、ネジ溝内の密封流体が大気側から密封流体側へ
流れることのみが許容され、反対向きに密封流体側から
大気側へ流れるのが遮断される。したがってこの逆流防
止弁の備える方向性によって、静止時に密封流体がネジ
溝を伝って漏れるのを有効に防止することができるとと
もに、回転時にネジ溝に十分なポンプ能力を発揮させる
ことができる。That is, first, in the sealing device according to the first aspect of the present invention having the above-mentioned structure, in the sealing device provided with a thread groove in the sealing portion slidably in close contact with the mating member, A check valve is provided in the screw groove to allow the flow to the outside and to block the flow in the opposite direction. Therefore, the check valve action by the check valve prevents the sealed fluid in the screw groove from the atmosphere side. Only the flow to the sealed fluid side is allowed, and the flow from the sealed fluid side to the atmosphere side in the opposite direction is blocked. Therefore, due to the directionality of the check ring, it is possible to effectively prevent the sealing fluid from leaking along the screw groove when stationary, and to exert sufficient pumping ability on the screw groove during rotation.
【００１６】またこれに加えて、上記構成を備えた本発
明の請求項２による密封装置においては、ネジ溝の底面
に固定または一体成形された板状の弁体によって逆流防
止弁が形成されているために、当該逆流防止弁の製作な
いし成形の容易性を確保することができる。In addition, in the sealing device according to the second aspect of the present invention having the above structure, the check valve is formed by a plate-shaped valve body fixed or integrally formed on the bottom surface of the screw groove. Therefore, the ease of manufacturing or molding the check valve can be ensured.
【図１】本発明の実施形態に係る密封装置の半裁断面図FIG. 1 is a half sectional view of a sealing device according to an embodiment of the present invention.
【図２】同密封装置の要部斜視図FIG. 2 is a perspective view of a main part of the sealing device.
【図３】同密封装置の要部断面図FIG. 3 is a sectional view of a main part of the sealing device.
【図４】（Ａ）および（Ｂ）とも逆流防止弁の作動状態
を示す断面図FIGS. 4A and 4B are cross-sectional views showing an operation state of a check valve;
【図５】従来例に係る密封装置の要部斜視図FIG. 5 is a perspective view of a main part of a sealing device according to a conventional example.
１ 取付環 ２ 外周シール部 ３ シールリップ ４ シール部 ５ ネジ溝 ５ａ 底面 ６ 逆流防止弁 ７ 弁体 １０ 軸（相手部材） １０ａ 周面 DESCRIPTION OF SYMBOLS 1 Mounting ring 2 Outer peripheral seal part 3 Seal lip 4 Seal part 5 Screw groove 5a Bottom surface 6 Check valve 7 Valve body 10 Shaft (counterpart member) 10a Peripheral surface
Claims (2)
シール部（４）にネジ溝（５）を設けた密封装置におい
て、 大気側から密封流体側への流れを許容するとともに反対
向きの流れを遮断する逆流防止弁（６）を前記ネジ溝
（５）内に設けたことを特徴とする密封装置。1. A sealing device provided with a thread groove (5) in a sealing portion (4) slidably in close contact with a mating member (10), allowing a flow from the atmosphere side to the sealing fluid side and in the opposite direction. A sealing device, characterized in that a check valve (6) for blocking the flow of air is provided in the thread groove (5).
板状の弁体（７）によって逆流防止弁（６）を形成した
ことを特徴とする密封装置。2. The sealing device according to claim 1, wherein a check valve (6) is formed by a plate-shaped valve element (7) fixed or integrally formed on a bottom surface (5a) of the screw groove (5). And sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14925599A JP4069345B2 (en) | 1999-05-28 | 1999-05-28 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14925599A JP4069345B2 (en) | 1999-05-28 | 1999-05-28 | Sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000337518A true JP2000337518A (en) | 2000-12-05 |
| JP4069345B2 JP4069345B2 (en) | 2008-04-02 |
Family
ID=15471272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14925599A Expired - Fee Related JP4069345B2 (en) | 1999-05-28 | 1999-05-28 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4069345B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10033446C2 (en) * | 2000-07-10 | 2003-08-21 | Bruss Dichtungstechnik | Shaft seal |
| JP2007183005A (en) * | 2001-04-10 | 2007-07-19 | Carl Freudenberg Kg | Radial shaft seal |
| JP2009204039A (en) * | 2008-02-27 | 2009-09-10 | Nok Corp | Sealing device |
| CN103867723A (en) * | 2012-12-17 | 2014-06-18 | Skf公司 | Seal and method for manufacturing thereof |
| CN110822091A (en) * | 2019-12-05 | 2020-02-21 | 青岛海力威新材料科技股份有限公司 | Two-way sealed PTFE crankshaft oil seal |
-
1999
- 1999-05-28 JP JP14925599A patent/JP4069345B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10033446C2 (en) * | 2000-07-10 | 2003-08-21 | Bruss Dichtungstechnik | Shaft seal |
| DE10033446C5 (en) * | 2000-07-10 | 2006-12-14 | Dichtungstechnik G. Bruss Gmbh & Co. Kg | Shaft seal |
| JP2007183005A (en) * | 2001-04-10 | 2007-07-19 | Carl Freudenberg Kg | Radial shaft seal |
| JP2009204039A (en) * | 2008-02-27 | 2009-09-10 | Nok Corp | Sealing device |
| CN103867723A (en) * | 2012-12-17 | 2014-06-18 | Skf公司 | Seal and method for manufacturing thereof |
| CN110822091A (en) * | 2019-12-05 | 2020-02-21 | 青岛海力威新材料科技股份有限公司 | Two-way sealed PTFE crankshaft oil seal |
| CN110822091B (en) * | 2019-12-05 | 2021-06-22 | 青岛海力威新材料科技股份有限公司 | Two-way sealed PTFE crankshaft oil seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4069345B2 (en) | 2008-04-02 |
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