JPH0366981A - Shaft sealing device - Google Patents
Shaft sealing deviceInfo
- Publication number
- JPH0366981A JPH0366981A JP1203499A JP20349989A JPH0366981A JP H0366981 A JPH0366981 A JP H0366981A JP 1203499 A JP1203499 A JP 1203499A JP 20349989 A JP20349989 A JP 20349989A JP H0366981 A JPH0366981 A JP H0366981A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- shaft
- fixed
- packing
- sliding
- 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
- 238000007789 sealing Methods 0.000 title claims description 36
- 238000012856 packing Methods 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract 2
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明は、水中遠心ポンプ等、水中回転機器における軸
封装置に関し、更に詳しくは、メカニカルシールとダス
トシールとを併設するダブルシールタイプの軸封装置に
関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a shaft sealing device for underwater rotating equipment such as a submersible centrifugal pump, and more specifically to a shaft sealing device of a double seal type that is equipped with a mechanical seal and a dust seal. It is related to.
［従来技術とその問題点］
一般に、ダブルシールタイプの軸封装置では、リノブ型
パッキングのリップ先端部をポンプ軸の外周面へ対接さ
せることにより、ラジアル方向の摺動密封面を構成して
いるため、ポンプ軸の磨耗を生じるという欠点がある。[Prior art and its problems] Generally, in a double seal type shaft sealing device, a sliding sealing surface in the radial direction is formed by bringing the tip of the lip of the lubricant packing into contact with the outer peripheral surface of the pump shaft. This has the disadvantage of causing wear on the pump shaft.
また、水圧が洩れを拡大する方向へ次第に働くため、初
期的効果があるにとどまり、軸封効果は経時的に減少傾
向となる。Furthermore, since the water pressure gradually acts in a direction that expands the leakage, there is only an initial effect, and the shaft sealing effect tends to decrease over time.
［発明の目的］
本発明の目的は、ダストシールの機能に優れ、ポンプ軸
を磨耗せしめないダブルシールタイプの軸封装置であっ
て、しかも、メカニカルシールとダストシールとが一体
化されて軸封装置の取付長を短小化し得る構造とするこ
とにある。[Object of the Invention] An object of the present invention is to provide a double seal type shaft sealing device that has excellent dust seal function and does not cause wear on the pump shaft, and furthermore, a mechanical seal and a dust seal are integrated to improve the shaft sealing device. The purpose is to create a structure that allows the installation length to be shortened.
［発明の構成］
本発明に係るダブルシールタイプの軸封装置においては
、
回転軸と遊合する固定密封環の表側端面をメカニカルシ
ール側の回転密封環に対接する摺滑シール面となし、裏
側端面をダストシール側の後記ＩＪツブ型パフキングに
対接する摺滑シール面となし、緩衝パッキングの内周面
環溝へ前記固定密封環を一体状に定着すると共に、外周
面環溝を取付ハウジングの軸孔内周面へ圧接状に定着さ
せ、前記取付ハウジングの裏側において嵌め合い部を回
転軸の外周に嵌着させたリップ型パブキングのリップ部
を、前記固定密封環における裏側端面の摺滑シール面へ
対接させるのである。[Structure of the Invention] In the double seal type shaft seal device according to the present invention, the front end surface of the fixed sealing ring that loosely engages with the rotating shaft is a sliding sealing surface that comes into contact with the rotating sealing ring on the mechanical seal side, and the back side The end face is made into a sliding sealing surface that comes into contact with the IJ tube type puffing described later on the dust seal side, and the fixed sealing ring is integrally fixed to the inner circumferential groove of the buffer packing, and the outer circumferential groove is attached to the shaft of the housing. The lip part of the lip type pub king, which is fixed to the inner peripheral surface of the hole under pressure and whose fitting part is fitted to the outer periphery of the rotating shaft on the back side of the mounting housing, is attached to the sliding sealing surface of the back end face of the fixed sealing ring. It makes them face each other.
［実施例］
実施態様を例示した図面について説明すると、ｌは金属
板製の取付ハウジングであって、板体に穿設された軸孔
の内周面２を後記緩衝パッキング３の取付部とする。[Example] To explain the drawings illustrating the embodiment, l is a mounting housing made of a metal plate, and the inner circumferential surface 2 of the shaft hole bored in the plate is the mounting part of the buffer packing 3 described later. .
緩衝パッキング３は、段付環状の板金３ａを芯材として
、これをゴム或は軟質の合成樹脂からなる弾褥性被覆層
３ｂでモールドし、内周面環溝４内へ後記固定密封環５
を一体状に定着すると共に、外周面環溝６を前記取付ハ
ウジング１の軸孔内周面２へ圧接状に定着させる。The buffer packing 3 is made by using a stepped annular sheet metal 3a as a core material, molding this with an elastic coating layer 3b made of rubber or soft synthetic resin, and inserting a fixed sealing ring 5 (described later) into an inner circumferential ring groove 4.
are fixed integrally, and the outer circumferential surface annular groove 6 is fixed to the shaft hole inner circumferential surface 2 of the mounting housing 1 in a press-contact manner.
固定密封環５は、シリコンカーバイト等で作られてポン
プ軸等の回転軸７と遊合し、表側端面をメカニカルシー
ル側の回転密封環８ａに対接する摺滑シール面５ａとな
し、裏側端面をダストシール側の後記リップ型パッキン
グ８ｂに対接する摺滑シール面５ｂとなし、外周面を前
記緩衝パッキング３への定着面とするが、前記緩衝パッ
キング３の塑造時に結合されて内周面環溝４内へ定着さ
れた状態となるのである。The fixed sealing ring 5 is made of silicon carbide or the like and is loosely engaged with a rotating shaft 7 such as a pump shaft, and has a front end surface as a sliding sealing surface 5a that comes into contact with a rotating sealing ring 8a on the mechanical seal side, and a back end surface. is used as a sliding seal surface 5b that is in contact with the lip-type packing 8b (described later) on the dust seal side, and the outer peripheral surface is used as a fixing surface to the buffer packing 3, which is joined when the buffer packing 3 is molded to form an annular groove on the inner peripheral surface. This results in a state in which it is fixed in the inside of 4.
前記リップ型パ１キング８ｂは、ゴム或は合成ゴム等の
弾褥性材料でＶ字状に作られており、取付ハウジング１
の裏側において、嵌め合い部を回転軸７の外周に嵌着さ
せ、リップ部を前記固定密封環５における裏側端面の摺
滑シール面５ｂへ対接させて、ダストシールの作用を司
らせるのである。そしてポンプ駆動時には、水圧がリッ
プ部を上記摺滑シール面５ｂへ押圧するよう作用して、
ダストシール機能が高められることになる。The lip-type packing 8b is made of a resilient material such as rubber or synthetic rubber and has a V-shape, and is attached to the mounting housing 1.
On the back side, the fitting part is fitted onto the outer periphery of the rotating shaft 7, and the lip part is brought into contact with the sliding seal surface 5b on the back side end face of the fixed sealing ring 5, thereby controlling the dust sealing action. . When the pump is driven, water pressure acts to press the lip portion against the sliding seal surface 5b.
The dust sealing function will be enhanced.
［効 果］
本発明によれば、リップ型パッキング８ｂのリップ部が
回転軸７に摺接することなく、固定密封環５の裏面に形
成される摺滑シール面５ｂへ摺接するのであるから、長
期間使用しても回転軸７が磨耗することはない。また、
ポンプ駆動時には、水圧がリップ部を摺滑シール面５ｂ
へ押圧するよう作用するので、ダストシール機能が高め
られるという利点を伴うのである。更にまた、メカニカ
ルシール側の固定密封環５を利用してダストシール側の
リップ型パッキング８ｂを摺接させるという、ダブルシ
ールの一体化構造により、軸方向の長さを短小化し得る
という利点がある。[Effect] According to the present invention, the lip portion of the lip-type packing 8b does not come into sliding contact with the rotating shaft 7, but comes into sliding contact with the sliding seal surface 5b formed on the back surface of the fixed sealing ring 5. The rotating shaft 7 will not wear out even if used for a period of time. Also,
When the pump is driven, water pressure slides on the lip part and seals the seal surface 5b.
This has the advantage of enhancing the dust sealing function. Furthermore, the integrated structure of the double seal, in which the fixed sealing ring 5 on the mechanical seal side is brought into sliding contact with the lip type packing 8b on the dust seal side, has the advantage that the length in the axial direction can be shortened.
第１図は本発明に係るダブルシールタイプの軸封装置を
水中遠心ポンプに施したた一事例を示す要部縦断側面図
、第２図は第１図の要部拡大図、第３図は本発明に係る
ダブルシールタイプの軸封装置を水中遠心ポンプに施し
た他の事例を示す要部縦断側面図、第４図は第３図の要
部拡大図、第５図は従来のダブルシールタイプの軸封装
置を水中遠心ポンプに施した事例を示す要部縦断側面図
である。
ｌ・・・・回転軸、２・・・・軸孔内周面、３・・・・
緩衝パッキング、４・・・・内周面環溝、５・・・・固
定密封環、５ａ・・・・表側摺滑シール面、５ｂ・・・
・裏側摺滑シール面、６・・・・外周面環溝、７・・・
・回転軸、８ａ・・・・回転密封環、８ｂ・・・・リッ
プ型パッキング。Fig. 1 is a longitudinal cross-sectional side view of the main part showing an example of applying the double seal type shaft sealing device according to the present invention to a submersible centrifugal pump, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is an enlarged view of the main part of Fig. 1. A vertical sectional side view of the main part showing another example of a submersible centrifugal pump in which the double seal type shaft sealing device according to the present invention is applied, FIG. 4 is an enlarged view of the main part of FIG. 3, and FIG. 5 is a conventional double seal FIG. 2 is a longitudinal sectional side view of a main part showing an example of a submersible centrifugal pump in which a shaft sealing device of this type is applied to a submersible centrifugal pump. l...rotating shaft, 2...inner peripheral surface of shaft hole, 3...
Buffer packing, 4... Inner peripheral surface ring groove, 5... Fixed sealing ring, 5a... Front sliding seal surface, 5b...
・Back side sliding seal surface, 6...Outer peripheral surface ring groove, 7...
・Rotating shaft, 8a... Rotating sealing ring, 8b... Lip type packing.
Claims (1)
おいて、 回転軸（７）と遊合する固定密封環（５）の表側端面を
メカニカルシール側の回転密封環（８ａ）に対接する摺
滑シール面（５ａ）となし、裏側端面をダストシール側
の後記リップ型パッキング（８ｂ）に対接する摺滑シー
ル面（５ｂ）となし、緩衝パッキング（３）の内周面環
溝（４）へ前記固定密封環（５）を一体状に定着すると
共に、外周面環溝（６）を取付ハウジング（１）の軸孔
内周面（２）へ圧接状に定着させ、 前記取付ハウジング（１）の裏側において嵌め合い部を
回転軸（７）の外周に嵌着させたリップ型パッキング（
８ｂ）のリップ部を、前記固定密封環（５）における裏
側端面の摺滑シール面（５ｂ）へ対接させたことを特徴
とする、 軸封装置。[Claims] In a shaft sealing device that includes a mechanical seal and a dust seal, the front end surface of a fixed sealing ring (5) that loosely engages with a rotating shaft (7) is brought into contact with a rotating sealing ring (8a) on the mechanical seal side. A sliding seal surface (5a) is formed, the back end surface is a sliding seal surface (5b) that is in contact with a lip type packing (8b) described later on the dust seal side, and an annular groove (4) on the inner peripheral surface of the buffer packing (3). The fixed sealing ring (5) is integrally fixed to the mounting housing (1), and the outer circumferential surface ring groove (6) is fixed to the inner circumferential surface (2) of the shaft hole of the mounting housing (1) in a press-contact manner. ) on the back side of the lip-type packing (
8b) is brought into contact with a sliding sealing surface (5b) on a back end surface of the fixed sealing ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203499A JP2792008B2 (en) | 1989-08-04 | 1989-08-04 | Shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203499A JP2792008B2 (en) | 1989-08-04 | 1989-08-04 | Shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0366981A true JPH0366981A (en) | 1991-03-22 |
| JP2792008B2 JP2792008B2 (en) | 1998-08-27 |
Family
ID=16475171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1203499A Expired - Fee Related JP2792008B2 (en) | 1989-08-04 | 1989-08-04 | Shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792008B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725365U (en) * | 1993-10-20 | 1995-05-12 | 株式会社井上製作所 | Kneading machine end face sealing device |
| US6802468B2 (en) * | 2001-03-07 | 2004-10-12 | Shimano Inc. | Water-sealing component assembly |
-
1989
- 1989-08-04 JP JP1203499A patent/JP2792008B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725365U (en) * | 1993-10-20 | 1995-05-12 | 株式会社井上製作所 | Kneading machine end face sealing device |
| US6802468B2 (en) * | 2001-03-07 | 2004-10-12 | Shimano Inc. | Water-sealing component assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2792008B2 (en) | 1998-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |