JPH0448367Y2 - - Google Patents

Info

Publication number
JPH0448367Y2
JPH0448367Y2 JP1987177601U JP17760187U JPH0448367Y2 JP H0448367 Y2 JPH0448367 Y2 JP H0448367Y2 JP 1987177601 U JP1987177601 U JP 1987177601U JP 17760187 U JP17760187 U JP 17760187U JP H0448367 Y2 JPH0448367 Y2 JP H0448367Y2
Authority
JP
Japan
Prior art keywords
rotating shaft
fixed
shaft
sealing
plate
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
Application number
JP1987177601U
Other languages
Japanese (ja)
Other versions
JPH0182370U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1987177601U priority Critical patent/JPH0448367Y2/ja
Publication of JPH0182370U publication Critical patent/JPH0182370U/ja
Application granted granted Critical
Publication of JPH0448367Y2 publication Critical patent/JPH0448367Y2/ja
Expired legal-status Critical Current

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Landscapes

  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Description

【考案の詳細な説明】 [産業上の利用分野] 本考案は、固定部分を貫通して設けられた回転
軸において、固定部分の内外をシールするために
回転軸の貫通部に設けられる軸封装置に関するも
のである。例えば本考案は、内燃機関において回
転軸をクランクケース外に取出す場合等に、クラ
ンクケース及び回転軸の貫通部に設けてクランク
ケース内のオイルミストを外部に対してシールす
る装置として用いることができる。
[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a shaft seal provided at the penetrating part of the rotating shaft to seal the inside and outside of the fixed part in a rotating shaft provided through the fixed part. It is related to the device. For example, when the rotating shaft of an internal combustion engine is taken out of the crankcase, the present invention can be used as a device that is installed in the penetration part of the crankcase and the rotating shaft to seal oil mist inside the crankcase from the outside. .

[従来の技術] 従来、内燃機関のクランクケースにおける回転
軸の貫通部分には、例えば第2図に示すようなV
リング方式の軸封装置が設けられていた。即ち、
固定部材であるクランクケース側には固定板1が
設けられており、回転軸2はこの固定板を挿通し
てケース外部に突出している。固定板1の内部に
ある回転軸2にはVリング3の基部3aが固定さ
れており、そのリツプ部3bが固定板1の内面に
摺動自在に接触して回転軸2と固定板1の間をシ
ールしている。
[Prior Art] Conventionally, in the crankcase of an internal combustion engine, a V-shaped part as shown in FIG.
A ring-type shaft sealing device was provided. That is,
A fixing plate 1 is provided on the crankcase side as a fixing member, and the rotating shaft 2 passes through this fixing plate and projects to the outside of the case. A base portion 3a of a V-ring 3 is fixed to the rotating shaft 2 inside the fixed plate 1, and its lip portion 3b slidably contacts the inner surface of the fixed plate 1, so that the rotating shaft 2 and the fixed plate 1 are connected to each other. It seals the space between them.

又この従来例に関連した技術が特開昭62−
180171号に開示されている。第3図に示すよう
に、このシール装置は、回転軸101に固定され
て回転軸101と共に回転する第1シール部材1
02と、固定側であるハウジング103にL字形
のリング部材104を介して取付けられた第2シ
ール部材105とを有しており、第1シール部材
102が所要の弾力をもつてリング部材104内
面に密着するとともに、第2シール部材105も
所要の弾力をもつて回転軸101の表面に密着し
ている。そして第1シール部材102のリング部
材104に対する密着部分の重量を適宜に設定す
ることにより、回転軸101の回転中における第
1シール部材102の前記密着力を低減させるよ
うに構成されている。
Also, the technology related to this conventional example is disclosed in Japanese Patent Application Laid-open No. 1983-
Disclosed in No. 180171. As shown in FIG. 3, this sealing device includes a first sealing member 1 fixed to a rotating shaft 101 and rotating together with the rotating shaft 101.
02, and a second seal member 105 attached to the fixed side housing 103 via an L-shaped ring member 104. The second seal member 105 is also in close contact with the surface of the rotating shaft 101 with the required elasticity. By appropriately setting the weight of the portion of the first seal member 102 in close contact with the ring member 104, the contact force of the first seal member 102 during rotation of the rotating shaft 101 is reduced.

[考案が解決しようとする問題点] Vリング方式の軸封装置によれば、内外の圧力
差がある程度以上になると漏洩しやすくなるとい
う問題点があり、また高速回転時には遠心力によ
つて、Vリング3の基部3aが拡径してしまうと
共にリツプ部3bが立ち上がつてシール面の接触
圧が低下してしまうので、広範囲の回転で使用す
る場合に高回転側において軸のシール効果が低下
すると云う問題点がある。
[Problems to be solved by the invention] According to the V-ring type shaft sealing device, there is a problem that leakage is likely to occur when the pressure difference between the inside and outside exceeds a certain level. As the base portion 3a of the V-ring 3 expands in diameter, the lip portion 3b rises and the contact pressure on the sealing surface decreases, so when used over a wide range of rotations, the sealing effect of the shaft is reduced at high rotation speeds. There is a problem that it decreases.

また、特開昭62−180171号に示したシール装置
によれば、回転数の高・低や使用回転数の範囲に
よつては、ゴム等より成る第1シール部材102
が全ての条件下でシール効果を発揮できるとは限
らないという問題があつた。例えば低回転から高
回転に至る広い範囲で運転される機械において、
第1シール部材102の前記密着部分の重量を、
最高回転時にシール効果が最大となるように設定
すれば、最低回転下ではリング部材104への密
着力が強すぎて回転軸101の摩擦抵抗となつて
しまう。逆に、最低回転下で満足できるシール効
果が得られる様に設定しても、最高回転時には遠
心力によつて第1シール部材102が浮いてしま
い、リング部材104への密着力が弱くなつてシ
ール効果が低下してしまう。さらにまた、第2シ
ール部材105は、高回転下で摩耗が著しいとい
う問題点を有する。このように、2つのシール部
材を有するこのシール装置も、前述した他の従来
例と同じく、広範囲な回転には不向きである。
Further, according to the sealing device shown in JP-A No. 62-180171, the first sealing member 102 made of rubber etc.
There was a problem that the sealing effect could not be exhibited under all conditions. For example, in machines that are operated over a wide range of speeds from low to high speeds,
The weight of the close contact portion of the first seal member 102 is
If the sealing effect is set to be maximum at the maximum rotation, the adhesion force to the ring member 104 is too strong at the minimum rotation and becomes a frictional resistance of the rotating shaft 101. On the other hand, even if the setting is made so that a satisfactory sealing effect can be obtained at the lowest rotation, the first seal member 102 will float due to centrifugal force at the highest rotation, weakening its adhesion to the ring member 104. The sealing effect will be reduced. Furthermore, the second seal member 105 has the problem of significant wear under high rotation. As described above, this sealing device having two sealing members is also unsuitable for a wide range of rotation, like the other conventional examples described above.

[考案の目的] 回転軸が広範囲の回転の運転状態にある時で
も、全範囲で十分な密封性能を維持することがで
きる軸封装置を提供することを目的としている。
[Objective of the invention] It is an object of the present invention to provide a shaft sealing device that can maintain sufficient sealing performance over the entire range even when the rotating shaft is in a wide range of rotational operating states.

[問題点を解決するための手段] 本考案の軸封装置は、内側が加圧された固定部
材と該固定部材を挿通する回転軸との間を封止す
べく、該固定部材の内側の回転軸に設けられる軸
封装置であつて、まず、回転軸に固定される基部
と、回転軸が挿通する固定部材の内面に接触する
リツプ部とを有し、固定部材の内外をシールする
可撓性を備えた軸封部材を有している。そして、
さらに、回転軸に固定されて前記軸封部材の基部
の変形を防止するボス部と、前記軸封部材のリツ
プ部が接触している部分よりも外方において前記
固定部材の内面に微小な隙間をもつて対面する遠
心板とを備え、前記遠心板によつて流体を遠心方
向にはね飛ばす剛性を備えた軸封板とを具備して
いる。
[Means for Solving the Problems] The shaft sealing device of the present invention seals between the fixed member whose inside is pressurized and the rotating shaft passing through the fixed member. A shaft sealing device installed on a rotating shaft includes a base portion fixed to the rotating shaft and a lip portion that contacts the inner surface of a fixed member through which the rotating shaft is inserted, and is capable of sealing the inside and outside of the fixed member. It has a shaft sealing member with flexibility. and,
Furthermore, a minute gap is formed on the inner surface of the fixing member outwardly from a portion where the lip portion of the shaft sealing member contacts a boss portion that is fixed to the rotating shaft and prevents deformation of the base of the shaft sealing member. and a shaft sealing plate having a rigidity that allows the centrifugal plate to splash the fluid in the centrifugal direction.

[作用] 低回転時には、回転軸に固定されて回転する軸
封部材の一端が、固定部材に摺接し、固定部材の
内外をシールする。高回転軸には、前記軸封部材
の一端は遠心力で立上り、固定部材との接触圧は
低下するが、回転軸に固定された軸封板は軸封部
材を回転軸に押さえつけると共に漏洩を防止すべ
き流体を遠心方向に蹴飛ばすので、固定部材と回
転軸の間から流体が漏れてしまうことはない。
[Operation] During low rotation, one end of the shaft sealing member, which is fixed to the rotating shaft and rotates, comes into sliding contact with the fixed member, sealing the inside and outside of the fixed member. On a high rotation shaft, one end of the shaft seal member rises due to centrifugal force and the contact pressure with the fixed member decreases, but the shaft seal plate fixed to the rotating shaft presses the shaft seal member against the rotating shaft and prevents leakage. Since the fluid to be prevented is kicked away in the centrifugal direction, the fluid will not leak from between the fixed member and the rotating shaft.

[実施例] 第1図は本考案の一実施例を示す断面図であ
る。
[Embodiment] FIG. 1 is a sectional view showing an embodiment of the present invention.

図中10は内燃機関の回転軸であり、この回転
軸10は図示しないクランクケースに固定された
固定部材11の貫通孔12を挿通してクランクケ
ースの外部に突出している。固定部材11の内部
にある回転軸10には、貫通孔12の近傍に軸封
部材としてのVリング13が着装されている。V
リング13は、基部14の一端面側に一端部とし
てのリツプ部15を有する断面略V字形の環状部
材で、例えば合成ゴムより成る。Vリング13の
基部14は拡径された状態で回転軸10に着装さ
れており、この時リツプ部15は回転軸10と平
行な水平方向に沿つた形状となるように倒され
て、その先端部が固定部材11の内面側に接触し
ている。次に、固定部材11の内部にある回転軸
10には、軸封板16が固設されている。回転軸
10に固定された軸封板16のボス部17には凹
嵌部18が形成されており、この凹嵌部18に前
記Vリング13の基部14が入り込んでいる。即
ち前記Vリング13の基部14は、回転軸10に
固定された軸封板16のボス部17によつて、回
転軸10に対して位置決めされて固定されてい
る。軸封板16のボス部17の凹嵌部18側端面
には、遠心板としてのフランジ状の油切り板19
が、回転軸10と直交する面をもつて周状に突設
されている。この油切り板19の右側端面と、前
記固定部材11の内面との間には所定寸法の微小
な隙間が設けられている。
In the figure, reference numeral 10 denotes a rotating shaft of an internal combustion engine, and this rotating shaft 10 passes through a through hole 12 of a fixing member 11 fixed to a crankcase (not shown) and projects to the outside of the crankcase. A V ring 13 serving as a shaft sealing member is attached to the rotating shaft 10 inside the fixed member 11 near the through hole 12 . V
The ring 13 is an annular member having a substantially V-shaped cross section and having a lip portion 15 as one end on one end surface side of the base portion 14, and is made of, for example, synthetic rubber. The base portion 14 of the V-ring 13 is attached to the rotating shaft 10 in an enlarged diameter state, and at this time, the lip portion 15 is folded down to take a shape along the horizontal direction parallel to the rotating shaft 10, and its tip portion is in contact with the inner surface side of the fixing member 11. Next, a shaft sealing plate 16 is fixed to the rotating shaft 10 inside the fixed member 11. A recessed fitting part 18 is formed in the boss part 17 of the shaft sealing plate 16 fixed to the rotating shaft 10, and the base part 14 of the V-ring 13 fits into this recessed fitting part 18. That is, the base portion 14 of the V-ring 13 is positioned and fixed to the rotating shaft 10 by the boss portion 17 of the shaft sealing plate 16 fixed to the rotating shaft 10. A flange-shaped oil cutting plate 19 as a centrifugal plate is provided on the end surface of the boss portion 17 of the shaft sealing plate 16 on the recessed fitting portion 18 side.
is provided circumferentially protrudingly with a surface orthogonal to the rotating shaft 10. A small gap of a predetermined size is provided between the right side end surface of the oil cutting plate 19 and the inner surface of the fixing member 11.

次に、以上の構成における作用を説明する。ま
ず回転軸10が低回転運転をしている時や機関停
止中のプライミング時には、回転軸10に固定さ
れたVリング13は変形することなく回転軸10
と共に回動し、そのリツプ部15は固定部材11
の内面との摺動状態を維持する。従つて、機関の
運転に伴つてクランクケース内に発生・充満する
オイルミストが、貫通孔12と回転軸10の隙間
から外部に漏れ出てしまうことはない。回転軸1
0が高回転になると、Vリング13のリツプ部1
5は、回転軸10の半径方向に沿つた形状に近づ
くように遠心力によつて立上るので、その先端と
固定部材11の内面との接触圧は低下する。従つ
て、高回転時におけるリツプ部15の摩耗は少な
くてすむ。またVリング13の基部14は、軸封
板16の凹嵌部18によつて外側から保持固定さ
れているので、高回転によつて拡径してしまうこ
とはない。そしてこの時、油切り板19が高回転
して空気の流れを遠心方向に発生させ、固定部材
11の内部にあるオイル等の流体を外方に跳飛ば
すので、前述したようなリツプ部15における接
触圧の低下にも拘らず、内部の流体が回転軸10
との隙間から固定部材11の外へ漏出してしまう
ことはない。また低回転と高回転の中間の運転状
態では、油切り板19の跳飛ばし効果によつて大
部分の流体を跳飛ばし、Vリング13の近傍に入
り込んだ若干量の流体は、リツプ部15と固定部
材11との接触によつてシールする。
Next, the operation of the above configuration will be explained. First, when the rotating shaft 10 is operating at a low rotation speed or during priming while the engine is stopped, the V ring 13 fixed to the rotating shaft 10 does not deform.
The lip portion 15 rotates with the fixing member 11.
maintains a sliding state with the inner surface of the Therefore, the oil mist that is generated and filled in the crankcase as the engine operates does not leak out from the gap between the through hole 12 and the rotating shaft 10. Rotating axis 1
0 becomes high rotation, the lip part 1 of the V ring 13
5 rises due to centrifugal force so as to approximate the shape along the radial direction of the rotating shaft 10, so the contact pressure between its tip and the inner surface of the fixing member 11 decreases. Therefore, wear of the lip portion 15 during high rotation is reduced. Further, since the base portion 14 of the V-ring 13 is held and fixed from the outside by the recessed fitting portion 18 of the shaft sealing plate 16, the diameter will not expand due to high rotation. At this time, the oil cutting plate 19 rotates at a high speed to generate an air flow in the centrifugal direction, and the fluid such as oil inside the fixed member 11 is splashed outward, so that the oil cutting plate 19 rotates at a high speed and the fluid such as oil inside the fixing member 11 is splashed outward. Despite the decrease in contact pressure, the internal fluid remains on the rotating shaft 10.
It will not leak out of the fixing member 11 through the gap between the fixing member 11 and the fixing member 11. In addition, in an operating state between low rotation and high rotation, most of the fluid is splashed off by the splashing effect of the oil cutter plate 19, and a small amount of fluid that has entered the vicinity of the V ring 13 is removed from the lip portion 15. Sealing is achieved by contact with the fixing member 11.

一般に、前記油切り板19のような遠心板をシ
ール部分である固定部材から離して設けると、回
転時に高圧の内部から低圧の外部へむけて空気が
逆流してしまうが、本実施例のように、可撓性を
有するVリング13を用いるとともに、油切り板
19を固定部材11の内面に近接させて隙間を微
小に設定すれば、このような漏れを確実に防止す
ることができる。
Generally, if a centrifugal plate such as the oil drain plate 19 is provided apart from a fixed member that is a sealing part, air will flow backward from the high-pressure interior to the low-pressure exterior during rotation. In addition, such leakage can be reliably prevented by using a flexible V-ring 13 and by making the oil draining plate 19 close to the inner surface of the fixing member 11 so that the gap is small.

この実施例によれば、低回転下におけるVリン
グ13のリツプ部15で回転軸10をシールし、
高回転下においては該リツプ部15のみを変形さ
せてその摩耗を防ぐと共に、軸封板16の跳飛ば
し効果によつて必要なシール効果を得ることがで
きる。即ち、低回転及び高回転のいずれの運転状
態にある時でも、回転軸10を十分に密封するこ
とができる。
According to this embodiment, the lip portion 15 of the V-ring 13 seals the rotating shaft 10 under low rotation,
At high rotation speeds, only the lip portion 15 is deformed to prevent its wear, and the necessary sealing effect can be obtained by the effect of the shaft sealing plate 16 being thrown off. That is, the rotating shaft 10 can be sufficiently sealed in both low rotation and high rotation operating states.

[考案の効果] 本考案の軸封装置は、加圧された固定部材の内
側で回転軸にとりつけられ、可撓性の軸封部材を
固定部材の内面に接触させるとともに、この接触
部分よりも外方で遠心板を同内面にごく近接して
設けるようにした。従つて、回転軸の回転時に、
高圧の固定部材の内側から低圧の外側への空気の
逆流は確実に防止され、加圧された内部と外気と
の間を完全にシールできる。そして、可撓性の軸
封部材は剛性のある軸封板で確実に固定されてい
るので、拘束回転時にも問題は発生せず、本軸封
装置は低回転から高回転に至る広い運転状態にわ
たつて回転軸のシール性能を安定して確保するこ
とができる。
[Effects of the invention] The shaft sealing device of the present invention is attached to a rotating shaft inside a pressurized fixed member, and brings the flexible shaft sealing member into contact with the inner surface of the fixed member, and further A centrifugal plate is provided on the outside in close proximity to the same inner surface. Therefore, when the rotating shaft rotates,
Backflow of air from the inside of the high-pressure fixing member to the low-pressure outside is reliably prevented, and a complete seal can be created between the pressurized inside and the outside air. Since the flexible shaft sealing member is securely fixed by the rigid shaft sealing plate, no problems occur even during restricted rotation, and this shaft sealing device can be used in a wide range of operating conditions from low rotation to high rotation. The sealing performance of the rotating shaft can be stably ensured over a period of time.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本考案の一実施例を示す断面図、第2
図は従来の軸封装置の一例を示す断面図、第3図
は従来の軸封装置の他の一例を示す断面図であ
る。 10……回転軸、11……固定部材、13……
軸封部材としてのVリング、15……一端部とし
てのリツプ部、16……軸封板。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing an example of a conventional shaft sealing device, and FIG. 3 is a sectional view showing another example of a conventional shaft sealing device. 10... Rotating shaft, 11... Fixed member, 13...
A V ring as a shaft sealing member, 15...a lip portion as one end, 16...a shaft sealing plate.

Claims (1)

【実用新案登録請求の範囲】 内側が加圧された固定部材と該固定部材を挿通
する回転軸との間を封止すべく、該固定部材の内
側の回転軸に設けられる軸封装置において、 回転軸に固定される基部と、回転軸が挿通する
固定部材の内面に接触するリツプ部とを有し、固
定部材の内外をシールする可撓性を備えた軸封部
材と、 回転軸に固定されて前記軸封部材の基部の変形
を防止するボス部と、前記軸封部材のリツプ部が
接触している部分よりも外方において前記固定部
材の内面に微小な隙間をもつて対面する遠心板と
を備え、前記遠心板によつて流体を遠心方向には
ね飛ばす剛性を備えた軸封板とを具備する軸封装
置。
[Claims for Utility Model Registration] In order to seal between a fixed member whose inside is pressurized and a rotating shaft passing through the fixed member, a shaft sealing device is provided on the rotating shaft inside the fixed member, A flexible shaft sealing member that has a base fixed to the rotating shaft and a lip part that contacts the inner surface of the fixed member through which the rotating shaft is inserted, and seals the inside and outside of the fixed member, and fixed to the rotating shaft. a boss portion that prevents deformation of the base portion of the shaft sealing member; and a centrifugal portion that faces the inner surface of the fixing member with a small gap outward from the portion where the lip portion of the shaft sealing member contacts. A shaft sealing device comprising: a shaft sealing plate having a rigidity that causes fluid to be splashed in a centrifugal direction by the centrifugal plate.
JP1987177601U 1987-11-24 1987-11-24 Expired JPH0448367Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987177601U JPH0448367Y2 (en) 1987-11-24 1987-11-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987177601U JPH0448367Y2 (en) 1987-11-24 1987-11-24

Publications (2)

Publication Number Publication Date
JPH0182370U JPH0182370U (en) 1989-06-01
JPH0448367Y2 true JPH0448367Y2 (en) 1992-11-13

Family

ID=31469261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987177601U Expired JPH0448367Y2 (en) 1987-11-24 1987-11-24

Country Status (1)

Country Link
JP (1) JPH0448367Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54163260A (en) * 1978-06-15 1979-12-25 Kubota Ltd Drop sealing member

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54163260A (en) * 1978-06-15 1979-12-25 Kubota Ltd Drop sealing member

Also Published As

Publication number Publication date
JPH0182370U (en) 1989-06-01

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