JPH02199375A - Composite type noncontact seal device - Google Patents
Composite type noncontact seal deviceInfo
- Publication number
- JPH02199375A JPH02199375A JP1856489A JP1856489A JPH02199375A JP H02199375 A JPH02199375 A JP H02199375A JP 1856489 A JP1856489 A JP 1856489A JP 1856489 A JP1856489 A JP 1856489A JP H02199375 A JPH02199375 A JP H02199375A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- seal
- sealing ring
- rotary
- stationary
- 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
- 239000002131 composite material Substances 0.000 title claims description 8
- 239000012530 fluid Substances 0.000 claims abstract description 54
- 238000007789 sealing Methods 0.000 claims description 113
- 230000015556 catabolic process Effects 0.000 abstract 2
- 230000008595 infiltration Effects 0.000 abstract 2
- 238000001764 infiltration Methods 0.000 abstract 2
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000003595 mist Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
［産業上の利用分野］
本発明は非接触シール装置に係り、特にオリフィス形非
接触シールとグループ形非接触シールとを組み合わせた
複合式非接触シール装置に関する。
［従来の技術］
従来より１機内の低圧（例えば真空）状態を保持してお
く必要のある被軸封機器において、その軸封部に適用さ
れるシール装置として、第４図に示す複合式非接触シー
ル装置が知られている。
この種のシール装置は、被軸封機器の回転部材１（図示
例では回転軸ＩＡと同時回転する回転スリーブＩＢ）と
同時回転する回転密封環２Ａを設けた回転側シール要素
２と、被軸封機器のケーシング３側のフランジ３Ａに１
周方向等間隔で配置した複数の回り止めピン３Ｂを介し
て回転不能に保持され、かつスプリング３Ｃにより回転
密封環２Ａ側に常時付勢される静止密封環４Ａを設けた
固定側シール要素４を有し、静止密封環４Ａのシール面
４ａに周溝４ｂを形成するとともに、この周溝４ｂに開
口するオリフィス５ａを介設した絞り通路５が形成され
ている。
また、絞り通路５の入口には管路６を介してシール流体
供給源７が接続され、このシール流体供給源７から管路
６および絞り通路５を通してシール流体（例えばＮ２ガ
ス等の不活性ガス）を供給圧として静止密封環４Ａと回
転密封環２Ａのシール面４ａ、２ａの間に導入するよう
になっている。そして、この導入された流体がシール面
４ａ、２ａに作用してシール面４ａをシール面２ａから
離す方向に付勢し、シール面４ａをシール面２ａに当接
させる方向に付勢しているスプリング３Ｃのばね力との
バランス点の圧力、つまりポケット圧によってシール面
４ａ、２ａ間に例えば５〜２０ｇｍ程度の狭いシール隙
間を形成する。
一方、回転密封環２Ａのシール面２ａには、例えば第５
図に示すように、回転方向（矢印ａ）に前進角を有して
周方向に交差し、かつその終端が高圧（例えば大気圧）
機外側Ｙに開口している複数のグループ８が形成されて
いる。したがって、回転密封環２Ａが回転すると、その
回転方向に前進角を有する複数のグループ８に機外側Ｙ
の流体（例えば空気）が進入して、シール面２ａ 、
４ａの間に動圧を発生させることになる。
即ち、前記シール隙間は、主としてシール流体供給源７
．管路および絞り通路５を通って、シール面４ａ、２ａ
の間にシール流体を供給圧として導入させることによっ
て、スプリング３Ｃのばね力とのバランス点で生じるポ
ケット圧によって形成され、回転密封環２Ａの回転時に
おいて複数のグループ８から流体が進入することによっ
て生じる動圧を補助的に作用させるようにして、低圧機
内側Ｘと高圧機外側Ｙを非接触状態でシールするように
構成されている。
［発明が解決しようとする課題］
ところが、前記従来の複合式非接触シール装置では、管
路６においてシール流体の移動が不能な異常事態を生じ
て、供給圧が０に近ずくと、ポケット圧が低下し、該ポ
ケット圧とスプリング３Ｃのばね力とのバランス点が損
なわれて所定のシール隙間を形成し得なくなる。この場
合でも、グループ８の作用によって生じる動圧がシール
面２ａ、４ａに負荷されてはいるけれども、この動圧は
前述の供給圧と比較して著しく小さく補助的なものであ
るから、静止密封環４Ａがスプリング３Ｃのばね力によ
って回転密封環２Ａ側に移動して、シール面４ａ、２ａ
同士が接触してシール破壊を生じるごとになる。
また、複数のグループ８は、それぞれの終端を高圧機外
側Ｙに開口して形成しであるので、機外側流体とともに
オイルミスト等の異物がシール面２ａ、４ａ間に巻き込
まれるおそれを有し、異物がシール面２ａ、４ａ間に巻
き込まれると、この異物が低圧機内側Ｘに浸入する不都
合を生じることになる。
本発明は、このような事情に鑑みなされたもので、管路
においてシール流体の移動が不能な異常事態を生じて、
供給圧が低下したとしても、所定時間シール隙間を保持
しておくことの可能なポケット圧を確保して、シール面
同士の接触を回避して、シール破壊を防止するとともに
、オイルミスト等の異物が高圧機外側からシール面の間
に巻き込まれず、したがって異物が低圧機内側に浸入す
る不都合を確保に防止できる複合式非接触シール装置の
提供を目的としている。[Industrial Field of Application] The present invention relates to a non-contact seal device, and more particularly to a composite non-contact seal device that combines an orifice-type non-contact seal and a group-type non-contact seal. [Prior Art] Conventionally, in shaft-sealed equipment that needs to maintain a low-pressure (e.g., vacuum) state within a single machine, a composite type non-sealing device shown in Fig. 4 has been used as a sealing device applied to the shaft sealing part of the shaft-sealed equipment. Contact seal devices are known. This type of sealing device includes a rotating seal element 2 provided with a rotary sealing ring 2A that rotates simultaneously with a rotating member 1 of a shaft-sealed device (in the illustrated example, a rotating sleeve IB that rotates simultaneously with a rotating shaft IA), and 1 on the flange 3A on the casing 3 side of the sealed equipment
A stationary seal element 4 is provided with a stationary seal ring 4A that is held non-rotatably through a plurality of rotation prevention pins 3B arranged at equal intervals in the circumferential direction and is always urged toward the rotating seal ring 2A by a spring 3C. A circumferential groove 4b is formed in the seal surface 4a of the stationary sealing ring 4A, and a throttle passage 5 is formed with an orifice 5a opening in the circumferential groove 4b. Further, a seal fluid supply source 7 is connected to the entrance of the throttle passage 5 through a pipe line 6, and a seal fluid (for example, inert gas such as N2 gas) is passed from the seal fluid supply source 7 through the pipe line 6 and the throttle passage 5. ) is introduced as a supply pressure between the seal surfaces 4a and 2a of the stationary seal ring 4A and the rotating seal ring 2A. The introduced fluid acts on the seal surfaces 4a and 2a, biasing the seal surface 4a in a direction away from the seal surface 2a, and biasing the seal surface 4a in a direction to bring the seal surface 4a into contact with the seal surface 2a. A narrow seal gap of, for example, about 5 to 20 gm is formed between the seal surfaces 4a and 2a by the pressure at the balance point with the spring force of the spring 3C, that is, the pocket pressure. On the other hand, on the sealing surface 2a of the rotary seal ring 2A, for example, a fifth
As shown in the figure, it has an advancing angle in the rotation direction (arrow a) and intersects in the circumferential direction, and its terminal end is under high pressure (e.g. atmospheric pressure).
A plurality of groups 8 are formed which are open to the outside Y of the machine. Therefore, when the rotary sealing ring 2A rotates, a plurality of groups 8 having an advance angle in the direction of rotation are formed on the outboard side Y.
The fluid (for example, air) enters the sealing surface 2a,
Dynamic pressure will be generated between 4a. That is, the seal gap is mainly formed by the seal fluid supply source 7.
．． Through the conduit and throttle passage 5, the sealing surfaces 4a, 2a
By introducing sealing fluid as a supply pressure between them, a pocket pressure is generated at the balance point with the spring force of the spring 3C, and when the rotary sealing ring 2A rotates, fluid enters from the plurality of groups 8. The structure is such that the generated dynamic pressure acts auxiliary to seal the low-pressure machine inside X and the high-pressure machine outside Y in a non-contact state. [Problems to be Solved by the Invention] However, in the conventional composite type non-contact sealing device, when an abnormal situation occurs in which the sealing fluid cannot move in the pipe line 6 and the supply pressure approaches 0, the pocket pressure increases. decreases, and the balance point between the pocket pressure and the spring force of the spring 3C is lost, making it impossible to form a predetermined seal gap. Even in this case, although the dynamic pressure generated by the action of group 8 is applied to the sealing surfaces 2a, 4a, this dynamic pressure is significantly smaller than the aforementioned supply pressure and is supplementary, so static sealing is not possible. The ring 4A moves toward the rotary sealing ring 2A by the spring force of the spring 3C, and the sealing surfaces 4a, 2a
If they come into contact with each other, the seal will break. In addition, since the plurality of groups 8 are formed with their respective terminal ends opened to the outside Y of the high-pressure machine, there is a risk that foreign matter such as oil mist may be caught between the seal surfaces 2a and 4a together with the fluid outside the machine. If foreign matter is caught between the seal surfaces 2a and 4a, this foreign matter will enter the inside X of the low pressure machine, causing a problem. The present invention has been made in view of the above circumstances, and is intended to prevent the sealing fluid from moving in the pipe line due to an abnormal situation in which the sealing fluid cannot move.
Even if the supply pressure decreases, the pocket pressure that can maintain the seal gap for a predetermined period of time is ensured to avoid contact between seal surfaces, prevent seal breakage, and prevent foreign matter such as oil mist. The object of the present invention is to provide a composite non-contact sealing device that prevents foreign matter from getting caught between the sealing surfaces from the outside of the high-pressure machine, and therefore prevents foreign matter from entering the inside of the low-pressure machine.
前記目的を達成するために、本発明は、静止密封環に形
成され該静止密封環のシール面に開口する通路とシール
流体供給源とを接続する管路に。
前記通路をシール流体供給源と補助シール流体供給源に
切り換えて接続させる。切換え機構を介設し、かつ複数
のグループそれぞれの始端および終端をシール面内に設
定して形成したものである。
［作用］
本発明によれば、管路においてシール流体の移動が不能
になる異常事態を生じて、シール流体供給源からの供給
圧が低下すると、この状態が検出され切換え機構を切換
える。これにより、補助シ−ル流体供給源から管路およ
び通路を通つ−Ｃ補助シール流体が静止密封環と回転密
封環のシール面の間に送り込まれる。
シール面の間に送り込まれた補助シール流体は、始端お
よび終端をそれぞれ回転密封環のシール面内に設定して
形成した複数のグループに捕捉されることになる。その
ため、スプリングのばね力に抗して所定のシール間隙を
形成するのに必要なポケット圧が発生して、シール面同
士の接触を回避する。
また、前述のように始端および終端をそれぞれ回転密封
環のシール面内に設定して形成した複数のグループでは
、高圧機外側流体およびオイルミスト等の異物をシール
面間に巻き込むことがない、そのため、異物の低圧機内
側への浸入を防止できる。
［実施例］
以下、本発明を図面に示す実施例に基づいて詳細に説明
する。
第１図は本発明に係る複合式非接触シール装置の半裁断
面図、第２図は回転密封環の半裁正面図である。なお本
発明の特徴は、通路をシール流体供給源と、補助シール
流体供給源に切り換えて接続させる切換え機構を管路に
介設したことと、複数のグループそれぞれの始端および
終端を回転密封環のシール面内に設定して形成した構成
に係り、これらを除く他の部材およびその構成は従来例
と異ならないので、第１図および第２図において、第４
図および第５図に相当する部分には、それぞれ同一符号
を付して、その詳細な説明は省略する。
第１図および第２図において、管路６に切換機構９が介
設されている。この切換機構９は、例えば切換電磁弁に
よってなり、そのメインボート９ａがシール流体供給源
７に接続され、補助ボート９ｂが例えばＮ２ガス等の不
活性ガスを充填した補助用のバッファタンクによってな
る補助シール流体供給源１０に接続されている。
また、複数のグループ８それぞれの始端８ａおよび終端
８ｂを回転密封環２Ａのシール面２ａ内に設定して形成
しである。なおこれらグループ８の深さは１〜５ｐｍの
範囲とし、シール面２ａに範囲に設定している。
前記構成において、通常、切換機構９はそのメインボー
ト９ａと共通ボート９Ｃとを連通させるように保持され
ている。したがって、シール流体供給源７から管路６お
よび絞り通路５を通してシール流体（例えばＮ２ガス等
の不活性ガス）が供給圧として静止密封環４Ａと回転密
封環２Ａのシール面４ａ、２ａの間に導入され、この導
入された流体がシール面４ａ、２ａに作用してシール面
４ａをシール面２ａから離す方向に付勢し、シール面４
ａをシール面２ａに当接させる方向に付勢しているスプ
リング３Ｃのばね力とのバランス点の圧力、つまりポケ
ット圧によってシール面４ａ、２ａ間に例えば５〜２０
ｐｍ程度の狭いシール隙間を形成し、低圧機内側Ｘと高
圧機外側Ｙを非接触状態でシールする。
管路６においてシール流体供給源７からのシール流体の
移動が不能になる異常事態を生じて、シール流体供給源
７からの供給圧が低下すると、この状態が図示されてい
ない検出手段によって検出され、該検出手段からの信号
によって切換え機構９を切換え、その補助ボー）９ｂと
共通ボート９Ｃとを連通させる。したがって、補助シー
ル流体供給［（１０から管路６および通路５を通って、
例えばＮ２ガス等の不活性ガスによってなる補助シール
流体が供給圧として静止密封環４Ａと回転密封環２Ａの
シール面４ａ、２ａの間に送り込まれる。
シール面４ａ、２ａの間に送り込まれた補助シール流体
は、始端８ａおよび終端８ｂをそれぞれ回転密封環２Ａ
のシール面２ａ内に設定して形成した複数のグループ８
に捕捉される。そのため、５〜２０７ｚｍのシール隙間
を形成するのに必要なポケット圧が発生して、スプリン
グ３Ｃとのバランス点まで、該スプリング３Ｃのばね力
に抗して静止密封環４Ａを後退させ、シール面４ａ、２
ａ同士の接触を回避し、シール破壊を防止する。
複数のグループ８は、それぞれその始端８ａおよび終端
８ｂを回転密封環２Ａのシール面２ａ内に設定して形成
しているので、従来のグループ８のように、回転密封環
２Ａの回転時に高圧機外側Ｙの流体およびオイルミスト
等の異物をシール面２ａ、４ａ間に巻き込むことがない
、そのため、異物の低圧機内側Ｘへの浸入を防止できる
。
なお、補助シール流体供給源ｌＯとして前述のバッファ
タンクに代えて大気を活用するようにしてもよい、また
、第３図に示すように、プルーブ８をちどり形に形成し
てもよい。
［発明の効果］
以上のように、本発明によれば、静止密封環に形成され
該静止密封環のシール面に開口する通路とシール流体供
給源とを接続する管路に、前記通路をシール流体供給源
と補助シール流体供給源に切り換えて接続させる、切換
え機構を介設し、かつ複数のグループそれぞれの始端お
よび終端をシール面内に設定しているから、管路におい
てシール流体の移動が不能になる異常事態を生じても。
切換え機構の切り換えによって、補助シール流体をシー
ル面間に送り込むことができ、しかも回転密封環のシー
ル面内に始端および終端を設定して形成した複数のグル
ープで、送り込まれた補助シール流体を捕捉して、所定
のシール隙間を形成するのに必要なポケット圧を発生さ
せることができるので、シール面同士の接触を回避し、
シール破壊を確実に防止することができる。
また、始端および終端をそれぞれ回転密封環のシール面
内に設定して形成した複数のグループでは、高圧機外側
流体およびオイルミスト等の異物をシール面間に巻き込
むことがない、そのため。
異物の低圧機内側への浸入を防止できる。To achieve the above object, the present invention provides a conduit that connects a sealing fluid supply source with a passage formed in a stationary sealing ring and opening to a sealing surface of the stationary sealing ring. The passageway is switched and connected to a sealing fluid supply source and an auxiliary sealing fluid supply source. A switching mechanism is provided and the starting and ending ends of each of the plurality of groups are set within the sealing surface. [Operation] According to the present invention, when an abnormal situation occurs in which the movement of the seal fluid becomes impossible in the pipeline and the supply pressure from the seal fluid supply source decreases, this state is detected and the switching mechanism is switched. This forces -C auxiliary seal fluid from the auxiliary seal fluid supply through the conduits and passages between the sealing surfaces of the stationary and rotating seal rings. The auxiliary sealing fluid sent between the sealing surfaces is trapped in a plurality of groups formed by having starting and ending ends set within the sealing surfaces of the rotary sealing ring. Therefore, pocket pressure necessary to form a predetermined seal gap is generated against the spring force of the spring, thereby avoiding contact between the seal surfaces. In addition, as mentioned above, in the multiple groups formed by setting the starting end and the ending end within the sealing surface of the rotary sealing ring, foreign matter such as fluid outside the high-pressure machine and oil mist is not caught between the sealing surfaces. , it is possible to prevent foreign matter from entering the inside of the low-pressure machine. [Example] Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is a half-cut sectional view of a composite non-contact sealing device according to the present invention, and FIG. 2 is a half-cut front view of a rotary sealing ring. The features of the present invention are that a switching mechanism is provided in the pipe line to switch the passage between the sealing fluid supply source and the auxiliary sealing fluid supply source, and that the starting and ending ends of each of the plurality of groups are connected to the rotating sealing ring. Regarding the configuration formed within the sealing surface, other members and their configurations other than these are the same as the conventional example, so in FIGS. 1 and 2,
Portions corresponding to those in FIG. 5 and FIG. 5 are designated by the same reference numerals, and detailed explanation thereof will be omitted. In FIGS. 1 and 2, a switching mechanism 9 is provided in the conduit 6. The switching mechanism 9 includes, for example, a switching solenoid valve, and its main boat 9a is connected to the sealing fluid supply source 7, and the auxiliary boat 9b is an auxiliary buffer tank filled with an inert gas such as N2 gas. It is connected to a sealing fluid supply source 10 . Further, the starting end 8a and the ending end 8b of each of the plurality of groups 8 are set within the sealing surface 2a of the rotary sealing ring 2A. Note that the depth of these groups 8 is in the range of 1 to 5 pm, and is set within the range of the sealing surface 2a. In the above configuration, the switching mechanism 9 is normally held so as to communicate the main boat 9a and the common boat 9C. Therefore, sealing fluid (for example, inert gas such as N2 gas) is supplied from the sealing fluid supply source 7 through the pipe line 6 and the throttle passage 5 between the sealing surfaces 4a and 2a of the stationary sealing ring 4A and the rotating sealing ring 2A. The introduced fluid acts on the seal surfaces 4a, 2a and urges the seal surface 4a away from the seal surface 2a, causing the seal surface 4 to move away from the seal surface 2a.
The pressure at the balance point with the spring force of the spring 3C that urges a into contact with the sealing surface 2a, that is, the pocket pressure, causes a pressure of, for example, 5 to 20 mm between the sealing surfaces 4a and 2a.
A narrow seal gap of about pm is formed to seal the low-pressure machine inside X and the high-pressure machine outside Y in a non-contact state. When an abnormal situation occurs in which the seal fluid cannot move from the seal fluid supply source 7 in the pipe line 6 and the supply pressure from the seal fluid supply source 7 decreases, this state is detected by a detection means (not shown). , the switching mechanism 9 is switched by the signal from the detection means, and the auxiliary boat 9b is communicated with the common boat 9C. Therefore, the auxiliary sealing fluid supply [(from 10 through line 6 and passage 5;
For example, an auxiliary sealing fluid made of an inert gas such as N2 gas is fed as a supply pressure between the sealing surfaces 4a, 2a of the stationary sealing ring 4A and the rotating sealing ring 2A. The auxiliary sealing fluid sent between the sealing surfaces 4a and 2a rotates the starting end 8a and the terminal end 8b, respectively, into the rotating sealing ring 2A.
A plurality of groups 8 formed by setting within the sealing surface 2a of
captured by Therefore, pocket pressure necessary to form a seal gap of 5 to 207 zm is generated, and the stationary sealing ring 4A is retreated against the spring force of the spring 3C to the balance point with the spring 3C, and the sealing surface is 4a, 2
Avoid contact between a and prevent seal breakage. Since the plurality of groups 8 are formed by setting their starting ends 8a and terminal ends 8b within the sealing surface 2a of the rotary sealing ring 2A, unlike the conventional groups 8, when the rotary sealing ring 2A rotates, the high pressure machine Foreign matter such as fluid and oil mist on the outside Y is not caught between the seal surfaces 2a and 4a, and therefore foreign matter can be prevented from entering the inside X of the low-pressure machine. Note that the atmosphere may be used as the auxiliary sealing fluid supply source lO in place of the buffer tank described above, and the probe 8 may be formed in a zigzag shape as shown in FIG. [Effects of the Invention] As described above, according to the present invention, the passageway is sealed to the conduit connecting the sealing fluid supply source to the passageway formed in the stationary sealing ring and opening to the sealing surface of the stationary sealing ring. A switching mechanism is provided to switch and connect the fluid supply source and the auxiliary sealing fluid supply source, and the starting and ending ends of each of the multiple groups are set within the sealing surface, making it possible to prevent the movement of sealing fluid in the pipeline. Even if an abnormal situation occurs that makes it impossible. By switching the switching mechanism, the auxiliary sealing fluid can be sent between the sealing surfaces, and the auxiliary sealing fluid is captured in multiple groups formed by setting the starting and ending ends within the sealing surface of the rotating seal ring. This can generate the pocket pressure necessary to form a predetermined seal gap, thereby avoiding contact between the seal surfaces.
Breakage of the seal can be reliably prevented. Furthermore, in the case of a plurality of groups in which the starting end and the ending end are each set within the sealing surface of the rotary sealing ring, foreign matter such as the fluid outside the high-pressure machine and oil mist is not caught between the sealing surfaces. Prevents foreign matter from entering the inside of the low-pressure machine.
第１図ないし第３図は本発明の実施例を示し、第１図は
その全体機構を示す半裁断面図、第２図は回転密封環の
半裁正面図、第３図はグループの他の例を示す半裁正面
図、また第４図および第５図は従来例を示し、第４図は
その全体構成を示す半裁正面図、第５図は回転密封環の
半裁正面図である。
１・・・回転部材
２・・・回転側シール要素
２Ａ・・・回転密封環
２ａ・・・シール面
３・・・ケーシング
３Ｃ・・・スプリング
４・・・固定側シール要素
４Ａ・・・静止密封環
４ａ・・・シール面
５・・・通路
６・・・管路
７・・・シール流体供給源
８・・・グループ
８ａ・・・始端
８ｂ・・・終端
９・・・切換え機構
１０・・・補助シール流体供給源
第４図
第 ５ 図1 to 3 show embodiments of the present invention, FIG. 1 is a half-cut sectional view showing the overall mechanism, FIG. 2 is a half-cut front view of the rotary sealing ring, and FIG. 3 is another example of the group. FIG. 4 and FIG. 5 show a conventional example, FIG. 4 is a half-cut front view showing the overall structure, and FIG. 5 is a half-cut front view of the rotary sealing ring. 1...Rotating member 2...Rotating side sealing element 2A...Rotating seal ring 2a...Sealing surface 3...Casing 3C...Spring 4...Stationary side sealing element 4A...Stationary Sealing ring 4a...Sealing surface 5...Passage 6...Pipe line 7...Sealing fluid supply source 8...Group 8a...Starting end 8b...Terminal end 9...Switching mechanism 10. ...Auxiliary seal fluid supply source Fig. 4 Fig. 5
Claims (1)
を設けた回転側シール要素と、被軸封機器のケーシング
側に回転不能に保持され、かつスプリングにより回転密
封環側に常時付勢される静止密封環を設けた固定側シー
ル要素を有し、静止密封環に該静止密封環のシール面に
開口する通路が形成され、この通路に管路を介してシー
ル流体を静止密封環と回転密封環それぞれのシール面の
間に導入するシール流体供給源が接続されるとともに、
回転密封環のシール面に複数のグループが周方向に交差
して形成された複合式非接触シール装置において、前記
管路に前記通路をシール流体供給源と補助シール流体供
給源に切り換えて接続させる切換機構が介設され、かつ
前記複数のグループそれぞれの始端および終端がシール
面に設定して形成されていることを特徴とする複合式非
接触シール装置。(1) A rotary-side seal element equipped with a rotary sealing ring that rotates simultaneously with the rotating member of the shaft-sealed device, and a rotary-side seal element that is non-rotatably held on the casing side of the shaft-sealed device and is always attached to the rotary sealing ring side by a spring. The stationary sealing element has a stationary sealing element provided with a stationary sealing ring that is energized, and the stationary sealing ring has a passage that opens to the sealing surface of the stationary sealing ring, and the sealing fluid is supplied to the passage through a conduit to the stationary sealing ring. and a sealing fluid supply source to be introduced between the sealing surfaces of the rotary sealing ring and the rotary sealing ring, and
In a composite non-contact sealing device in which a plurality of groups are formed to intersect in the circumferential direction on a sealing surface of a rotary sealing ring, the passageway is connected to the conduit by switching between a sealing fluid supply source and an auxiliary sealing fluid supply source. 1. A composite non-contact sealing device, characterized in that a switching mechanism is provided, and a starting end and a terminal end of each of the plurality of groups are set on a sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1856489A JPH02199375A (en) | 1989-01-27 | 1989-01-27 | Composite type noncontact seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1856489A JPH02199375A (en) | 1989-01-27 | 1989-01-27 | Composite type noncontact seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02199375A true JPH02199375A (en) | 1990-08-07 |
| JPH0444145B2 JPH0444145B2 (en) | 1992-07-20 |
Family
ID=11975111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1856489A Granted JPH02199375A (en) | 1989-01-27 | 1989-01-27 | Composite type noncontact seal device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02199375A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7044470B2 (en) | 2000-07-12 | 2006-05-16 | Perkinelmer, Inc. | Rotary face seal assembly |
| JP2010164090A (en) * | 2009-01-13 | 2010-07-29 | Jtekt Corp | Sealing device and sealing method for rotating shaft |
| JP2021092259A (en) * | 2019-12-09 | 2021-06-17 | イーグル工業株式会社 | mechanical seal |
-
1989
- 1989-01-27 JP JP1856489A patent/JPH02199375A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7044470B2 (en) | 2000-07-12 | 2006-05-16 | Perkinelmer, Inc. | Rotary face seal assembly |
| JP2007263374A (en) * | 2000-07-12 | 2007-10-11 | Perkinelmer Fluid Sciences | Rotary face seal assembly |
| JP2010164090A (en) * | 2009-01-13 | 2010-07-29 | Jtekt Corp | Sealing device and sealing method for rotating shaft |
| JP2021092259A (en) * | 2019-12-09 | 2021-06-17 | イーグル工業株式会社 | mechanical seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0444145B2 (en) | 1992-07-20 |
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