CN200949547Y - Bellows mechanical seal for boiler feed water pump - Google Patents
Bellows mechanical seal for boiler feed water pump Download PDFInfo
- Publication number
- CN200949547Y CN200949547Y CN 200620042487 CN200620042487U CN200949547Y CN 200949547 Y CN200949547 Y CN 200949547Y CN 200620042487 CN200620042487 CN 200620042487 CN 200620042487 U CN200620042487 U CN 200620042487U CN 200949547 Y CN200949547 Y CN 200949547Y
- Authority
- CN
- China
- Prior art keywords
- bellows
- metal
- mechanical seal
- feed pump
- boiler feed
- 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 - Lifetime
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- Mechanical Sealing (AREA)
- Diaphragms And Bellows (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Disclosed is a bellows mechanical sealing of feed pump of large boiler, which is manufactured by using a welding metal bellows 1 as compensation component, the metal bellows 1 is constituted by welding a group of metal wave plates 2, the width, thickness and layer number of the metal wave plate 2 as well as the wave number and height of the welded metal bellows 1 are designed or adjusted according to the practical working requirements of bellows mechanical seal 7. The metal wave plates 2 has elasticity and can be manufactured by stainless steel; the metal bellows 1 which is constituted by welding plural metal wave plates 2 can be used when the environmental temperature is below 500 DEG C. Compared with spring style mechanical sealing of feed pump of large boiler, the utility model has better floatability, uniform circumferential elastic force, good sealing effect, excellent working stability and long service life.
Description
[technical field]
The utility model belongs to the mechanical sealing technology field, specifically a kind of boiler feed pump bellows mechanical seal.
[background technique]
At present, the mechanical seal of both at home and abroad using use at the station boiler feed water pump mostly is and utilizes the spring mechanical seal of element by way of compensation.But along with the continuous progress of technical merit, preposition mechanical seal for pump develops towards the direction of high temperature, high speed, and at this moment, the shortcoming of spring type mechanical sealing just progressively displays, and for example: 1, floatability is poor.The compensation mechanism of spring type mechanical sealing is mounted on the gland of mechanical seal or the axle sleeve, its floatability depends on the elasticity of the O of compensated loop place type rubber seal fully, when working as auxiliary seal ring because of O type rubber seal, must have certain decrement, so when spring promotion compensated loop compensates action, must overcome the surface friction drag of O type rubber seal, so its floatability is not good.In case O type rubber seal is at high temperature aging, its floatability is poorer, can cause mechanical seal to be lost efficacy.2, elastic force is inhomogeneous.Many spring structures make elastic force circumferentially inhomogeneous, and serious meeting causes the sealability instability.3, the cover of the dummy shaft on the gland easily produces premature wear, granule foreign in the medium easily is adsorbed on the O type rubber seal, and the constantly swing (floating) at work of O type rubber seal, thereby cause the premature wear of axle sleeve, its groove that causes can have a strong impact on the sealability and the floatability of O type rubber seal.4, O type rubber seal is aging easily under high temperature condition, follows the string, thereby causes the inefficacy of mechanical seal.
[summary of the invention]
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of performance is more stable, the better boiler feed pump bellows mechanical seal of sealing effect.
Of the present utility model being characterised in that: boiler feed pump is made with metal bellows with the compensating element of bellows mechanical seal.
Metal bellows is made of through welding one group of metal wave plate, and the real work of the wave number of metal bellows and the sealing of height machine vision requires and design or adjustment after the width of metal wave plate, thickness, the number of plies and the welding.
The metal wave plate has elasticity, and available stainless steel is made; The metal bellows that the metal wave plate is welded into can be worked under the temperature environment below 500 ℃.
With the metal bellows of welding by way of compensation the boiler feed pump made of element with bellows mechanical seal than with spring by way of compensation the boiler feed pump made of element have better floatability with spring type mechanical sealing, circumferentially the elastic force uniformity is also better, can use in the temperature below 500 ℃, working stability improves greatly; Because of boiler feed pump does not need O type rubber ring with bellows mechanical seal, so there is not the problem of O type rubber ring premature ageing in it, sealing effect is better, longer service life.
[description of drawings]
Accompanying drawing 1 is the utility model boiler feed pump bellows mechanical seal structural representation;
Accompanying drawing 2 is boiler feed pump spring type mechanical sealing working state schematic representations;
Accompanying drawing 3 is boiler feed pump bellows mechanical seal working state schematic representations.
Label described in the figure is respectively:
1, metal bellows, 2, the metal wave plate, 3, rotating ring, 4, stationary ring components, 5, spring, 6, O type rubber ring, 7, bellows mechanical seal.
[embodiment]
A kind of boiler feed pump bellows mechanical seal, its compensating element has adopted metal bellows 1, and metal bellows 1 is what be welded with metal wave plate 2; Metal wave plate 2 can adopt the stainless steel material impact briquetting, and the number of turns of its width, thickness, the number of plies and welding back metal bellows 1, the real work of height machine vision sealing require to design and adjust (referring to accompanying drawing 1).
In the manufacture process, should notice that the welding procedure and the welding back of metal wave plate 2 heat-treat metal bellows 1, the welding quality of metal the wave plate 2 and heat treatment that metal bellows 1 carries out is directly connected to quality and the using effect of boiler feed pump with bellows mechanical seal.
Claims (3)
1, a kind of boiler feed pump bellows mechanical seal is characterized in that, the compensating element of bellows mechanical seal (7) is made with metal bellows (1).
2, boiler feed pump bellows mechanical seal according to claim 1 is characterized in that, metal bellows (1) is made of through welding one group of metal wave plate (2).
3, boiler feed pump bellows mechanical seal according to claim 2 is characterized in that, metal wave plate (2) has elasticity, makes with stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042487 CN200949547Y (en) | 2006-06-07 | 2006-06-07 | Bellows mechanical seal for boiler feed water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042487 CN200949547Y (en) | 2006-06-07 | 2006-06-07 | Bellows mechanical seal for boiler feed water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200949547Y true CN200949547Y (en) | 2007-09-19 |
Family
ID=38892089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620042487 Expired - Lifetime CN200949547Y (en) | 2006-06-07 | 2006-06-07 | Bellows mechanical seal for boiler feed water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200949547Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588682A (en) * | 2012-02-20 | 2012-07-18 | 刘明辉 | One-step formed weldless mechanically sealed metal corrugated pipe |
| CN107842524A (en) * | 2017-11-21 | 2018-03-27 | 浙江天鹰机械密封件有限公司 | Sewage mechanical sealing device used for pump |
-
2006
- 2006-06-07 CN CN 200620042487 patent/CN200949547Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588682A (en) * | 2012-02-20 | 2012-07-18 | 刘明辉 | One-step formed weldless mechanically sealed metal corrugated pipe |
| CN107842524A (en) * | 2017-11-21 | 2018-03-27 | 浙江天鹰机械密封件有限公司 | Sewage mechanical sealing device used for pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070919 |
|
| EXPY | Termination of patent right or utility model |