CN2245693Y - Pressure balance shaft gland - Google Patents
Pressure balance shaft gland Download PDFInfo
- Publication number
- CN2245693Y CN2245693Y CN 95240620 CN95240620U CN2245693Y CN 2245693 Y CN2245693 Y CN 2245693Y CN 95240620 CN95240620 CN 95240620 CN 95240620 U CN95240620 U CN 95240620U CN 2245693 Y CN2245693 Y CN 2245693Y
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- pressure
- medium
- exocoel
- utility
- 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 - Fee Related
Links
Abstract
The utility model provides a pressure balance shaft gland. The structure of the utility model is characterized in that an outer cavity is arranged at an outer end of a rotating shaft; the outer cavity is filled with medium and is provided with a screw rod which carries out synchronized operation with the rotating shaft; a transition chamber is arranged between the outer chamber and an inner cavity; sealing pieces are arranged in the transition chamber. The utility model is mainly used for various devices, such as pumps, compressors, hydraulic motors, fans, etc., and can effectively prevent the leaking of the inner medium from the rotating shaft to the outside. Because outer pressure is generated at the outer end of the rotating shaft and is used for balancing inner pressure, the purpose of preventing the outer leakage of the inner medium is attained. The utility model has the advantages of reasonable design, simple structure, reliable sealing, strong versatility, etc.
Description
The utility model proposes a kind of pressure balance type axle envelope, be mainly used in equipment such as all kinds of pumps, compressor, oil hydraulic motor, blower fan, prevent that its interior media is from the outside seepage of rotating shaft.Belong to rotary dynamic seal apparatus.
Traditional axle envelope form has: forms such as material filling type sealing, seal with O ring, the sealing of outside framework oil seal formula, mechanical seal, owing to have pressure difference inside and outside the equipment, and have constantly friction between rotating shaft and the Sealing, medium takes place unavoidably to leak.
The purpose of this utility model is to propose a kind of pressure balance type axle novel, simple in structure, that sealing is reliable, with low cost to seal.Can overcome above-mentioned defective effectively.
Technical solution of the present utility model: rotating shaft is arranged, be provided with exocoel in the outer end of rotating shaft, be marked with medium in the exocoel and be equipped with and the synchronous operated screw rod of rotating shaft, adapter cavity is located between exocoel and the inner chamber, and inner seal liner is housed in the adapter cavity.Outer end in rotating shaft during use can produce a pressure outside, in order to the balance internal pressure, thereby prevents leaking of interior media.Screw rod in the exocoel, the rotation direction of its screw rod should make the exocoel medium produce the pressure that points to adapter cavity.Screw rod in the exocoel also can change impeller into.
The utility model is compared with existing axle envelope form, has following characteristics:＜1〉simple in structure, with low cost;＜2〉sealing is reliable, can not influence sealability because of the wearing and tearing of Sealing, also can play good seal action to the medium that contains particle;＜3〉highly versatile only need be transformed a little original equipment and can realize this function;＜4〉applied widely, the both various liquid of medium in the equipment, also gas or solid particle.The interior medium of Ru Shui, oil or cleaning etc.
Accompanying drawing is an example structure schematic representation of the present utility model.
Further specify technical solution of the present utility model below in conjunction with accompanying drawing, in the accompanying drawings, the inner of rotating shaft 6 is stretched in the equipment inner chamber 1, be provided with exocoel 9 in the outer end of rotating shaft, can pass through spout 4 injected media in exocoel, medium can be water, oil or interior medium, in exocoel, there is outside seal may 5 to prevent that medium wherein from leaking, also has screw rod 3 in the exocoel, fix by key 7 and back-up ring 8 and rotating shaft, and transport synchronously with rotating shaft, adapter cavity 2 is arranged between inner chamber and exocoel, inner seal liner 10 is housed in adapter cavity.When rotating shaft was rotated, screw rod also rotated thereupon, thereby made the medium in the exocoel produce the pressure outside of pointing to adapter cavity, simultaneously, when equipment work, also can produce the internal pressure of pointing to adapter cavity at inner chamber, if these two kinds of pressure can reach balance, then can stop leaking of interior media, reach balance and can take following measure: design suitable screw rod, change the gap of screw rod and exocoel, select the exocoel medium of different viscosities for use, also can between screw rod two ends, adorn a reduction valve, regulate outer cavity pressure.Equipment is when real work, because changing of Hair Fixer in the variation of operating mode can make, thereby the balance of rupture pressure, the measure that the utility model is taked is to be provided with adapter cavity between inside and outside chamber, the gap of adapter cavity and rotating shaft is less, and inner seal liner is housed, inner seal liner is to have adopted three O-ring seals, inside and outside pressure medium can produce the pressure loss when penetrating adapter cavity, the distance of one side infiltration that pressure is big, the pressure loss is also big, and the pressure on such two limits can reach pressure balance in certain in adapter cavity.Pressure medium in exocoel is because the effect of screw rod, progressively successively decrease from adapter cavity to outside seal may, therefore its pressure minimum at the outside seal may place, and might be negative value, because of also not leaking than the medium in the exocoel at work, the outside seal may of present embodiment is to adopt outside framework oil seal.Make the medium in the exocoel produce pressure, except adopting screw rod, also can adopt impeller.
Claims (3)
1. pressure balance type axle envelope is characterized in that: rotating shaft is arranged, be provided with in the outer end of rotating shaft
Exocoel is marked with medium and is equipped with and the synchronous operated screw rod of rotating shaft in exocoel, adapter cavity is located between exocoel and the inner chamber, and inner seal liner is housed in the adapter cavity.
2. pressure balance type axle envelope according to claim 1, it is characterized in that: the screw rod in the exocoel can change impeller into.
3. pressure balance type axle envelope according to claim 1 is characterized in that: can adorn a reduction valve between screw rod two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240620 CN2245693Y (en) | 1995-10-10 | 1995-10-10 | Pressure balance shaft gland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240620 CN2245693Y (en) | 1995-10-10 | 1995-10-10 | Pressure balance shaft gland |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2245693Y true CN2245693Y (en) | 1997-01-22 |
Family
ID=33882167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240620 Expired - Fee Related CN2245693Y (en) | 1995-10-10 | 1995-10-10 | Pressure balance shaft gland |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2245693Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370147C (en) * | 2005-10-27 | 2008-02-20 | 上海交通大学 | Shaft seal device used for ultra low specific rotating speed centrifugal fan |
| CN102008933A (en) * | 2010-10-19 | 2011-04-13 | 天津渤海化工有限责任公司天津碱厂 | Automatic pressure control method for mechanical seal of stirrer |
| CN106870350A (en) * | 2017-03-01 | 2017-06-20 | 昆山国显光电有限公司 | Piston pump |
| CN115173613A (en) * | 2021-06-28 | 2022-10-11 | 北京金风科创风电设备有限公司 | Wind generating set, transmission system and generator |
-
1995
- 1995-10-10 CN CN 95240620 patent/CN2245693Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370147C (en) * | 2005-10-27 | 2008-02-20 | 上海交通大学 | Shaft seal device used for ultra low specific rotating speed centrifugal fan |
| CN102008933A (en) * | 2010-10-19 | 2011-04-13 | 天津渤海化工有限责任公司天津碱厂 | Automatic pressure control method for mechanical seal of stirrer |
| CN106870350A (en) * | 2017-03-01 | 2017-06-20 | 昆山国显光电有限公司 | Piston pump |
| CN115173613A (en) * | 2021-06-28 | 2022-10-11 | 北京金风科创风电设备有限公司 | Wind generating set, transmission system and generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |