CN201330705Y - Mechanical seal structure of Roots vacuum pump - Google Patents
Mechanical seal structure of Roots vacuum pump Download PDFInfo
- Publication number
- CN201330705Y CN201330705Y CNU2009200670120U CN200920067012U CN201330705Y CN 201330705 Y CN201330705 Y CN 201330705Y CN U2009200670120 U CNU2009200670120 U CN U2009200670120U CN 200920067012 U CN200920067012 U CN 200920067012U CN 201330705 Y CN201330705 Y CN 201330705Y
- Authority
- CN
- China
- Prior art keywords
- mechanical seal
- blade shaft
- seal structure
- ring
- end cover
- 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
- 210000004907 gland Anatomy 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 5
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Mechanical Sealing (AREA)
- Sealing Devices (AREA)
Abstract
The utility model relates to a mechanical seal structure of Roots vacuum pump, comprising a pump body, a fan blade shaft, a front end cover, a rear end cover, a front cover, a rear cover, a front bearing seat, a rear bearing seat, gears and lubrication oil; bearings are separately arranged in the front bearing seat and the rear bearing seat; mechanical seals are separately arranged between the external circumference of the fan blade shaft sleeves and the internal circumference of the front end cover and the rear end cover; a rotating seal ring is installed on the protrusion end of the fan blade shaft sleeve; stationary seal rings are separately installed in the inner bore of the front end cover and the rear end cover. The utility model is used in the seals between the fan blade shaft and the end covers of Roots vacuum pump, having a unique structure, reliable seal performance and long service life, being suitable for delivering condensable gas, non-condensable gas or gas with a little corrosivity.
Description
Technical field
The utility model relates to Roots pump, particularly a kind of mechanical seal structure of Roots pump.
Background technique
Roots pump was invented by German engineer Roots the forties in 19th century, and it is a kind of rotary positive-displacement vacuum pump, and its effect is that incoagulable gas in seal container or the closed system or condensable gas are extracted, and reached the purpose of certain vacuum.
Roots pump in the past only is used on the technology of the cleaner gas of suction, uses more universal on industries such as food, electronics, light industry.Along with the fast development of modernization industry, particularly on chemical industry, because environmental protection, Roots pump also begins to be used in a large number.
The present Roots pump that uses, what its four axle heads adopted is piston ring packing, the seal clearance of itself and end cap is bigger, make Roots pump in running, can cause the perforation in the oil lubrication chamber of vacuum chamber and outer end, thereby cause emulsification of lubricant, influence the normal operation of Roots pump, therefore can not realize the sealing under the high vacuum.
Existing Roots pump mainly exists following some shortcomings part:
1, sealing reliability is poor, and leakage of oil, gas leakage are seriously.
2, lack working life, having used just needed more rering and overcoat in four months.
3, because piston ring is an opening, vacuum oil is easy to enter vacuum chamber.
The model utility content
Task of the present utility model provides a kind of mechanical seal structure of improved Roots pump, and it is poor that it has solved existing Roots pump sealing reliability, and leakage of oil, gas leakage are serious, and working life is short, and vacuum oil is easy to enter problems such as vacuum chamber.
Technical solution of the present utility model is as follows:
A kind of mechanical seal structure of Roots pump, it comprises the pump housing, blade shaft, front cover, rear end cover, protecgulum, bonnet, front-end bearing pedestal, rear bearing block, gear and lubricant oil, bearing is housed respectively in front-end bearing pedestal and the rear bearing block, be respectively equipped with mechanical seal between the cylindrical of the inner circle of described front cover and rear end cover and blade shaft axle sleeve, the external part of blade shaft axle sleeve is equipped with rotary packing ring, and the endoporus of front cover and rear end cover is equipped with stationary seal ring respectively.
Described stationary seal ring is by O RunddichtringO and the embedding mutually of the interior circle of front cover.
Described stationary seal ring is by O RunddichtringO and the embedding mutually of the interior circle of rear end cover.
Described rotary packing ring is become by rotating ring, O RunddichtringO, disc gland and balance cluster spring, and the disc gland is pressed and put on rotating ring and balance spring.
Described disc gland is fixed on the external part of blade shaft axle sleeve by jump ring.
Described disc gland and disc are made one.
The external part of described blade shaft axle sleeve is four external parts.
Described O RunddichtringO coats fluoroplastic by the inner ring of acid-resisting rubber material and outside and makes.
The mechanical seal structure of Roots pump of the present utility model is applied in the sealing of the blade shaft of Roots pump and end cap, its structure uniqueness, and sealability is reliable, long service life.
Roots pump of the present utility model is equipped with disc between fan blade axle head and end cap, the tension and the end cap inner ring of O RunddichtringO closely are adjacent to, lean on disc that the end faces of two frictions of stationary seal ring and rotary packing ring are carried out oil cooling but, the rotary packing ring gland is that the disc gland is equipped with automatic counterbalance spring, sealing surface is durable in use like this, the sealability height has guaranteed the condition of high vacuum degree in the vacuum cavity, is suitable for transmitting condensable gas, incoagulable gas and slightly corrosive gas.
When Roots pump is worked, the blade shaft rotation, disc is also followed rotation, at this moment constantly the lubricant oil in the end cap cavity is brought up the lubricated and cooling of rubbing surfaces quiet, moving two rings, makes that the sealing surface friction factor is little, long service life; Because rotating ring is provided with the spring balancing function, make that sealing is more firm.
Description of drawings
Fig. 1 is vertical view of the mechanical seal structure of a kind of Roots pump of the present utility model.
Fig. 2 is the zoomed-in view at I position among Fig. 1.
Embodiment
Referring to Fig. 1 and Fig. 2, the utility model is a kind of mechanical seal structure of Roots pump, and it comprises the pump housing 1, blade shaft 2, front cover 3, rear end cover 4, protecgulum 5, bonnet 6, front-end bearing pedestal 10, rear bearing block 12, gear 13 and lubricant oil 14.On the blade shaft 2 axle sleeve is housed, blade shaft 2 can be fitted to one with axle sleeve.In front-end bearing pedestal 10 and the rear bearing block 12 bearing 9 is housed respectively.
Between the cylindrical of the inner circle of front cover 3 and rear end cover 4 and blade shaft axle sleeve 7, be respectively equipped with mechanical seal 8.That is to say that mechanical seal 8 is installed on blade shaft axle sleeve 7 cylindricals and forward and backward end cap 3, the 4 interior circles.Mechanical seal 8 mainly is made of stationary seal ring 82 and rotary packing ring 83.The external part of blade shaft axle sleeve 7 is equipped with rotary packing ring 83, and the endoporus of front cover 3 and rear end cover 4 is equipped with stationary seal ring 82 respectively.The external part of blade shaft axle sleeve 7 is four external parts.
In the pump housing 1 front portion, stationary seal ring 82 is by O RunddichtringO 81 and front cover 3 interior circle embeddings mutually.At the pump housing 1 rear portion, stationary seal ring 82 is by O RunddichtringO 81 and rear end cover 4 interior circle embeddings mutually.
Rotary packing ring 83 is made up of rotating ring 831, O RunddichtringO 85, disc gland 86 and balance spring 84, and disc gland 86 is pressed and put on rotating ring 831 and balance spring 84.Disc gland 86 is fixed on four external parts of blade shaft axle sleeve 7 by jump ring 87.Disc gland 86 can be made an integral body with disc.
Mechanical seal 8 as shown in Figure 2, wherein O RunddichtringO 81,85 is with stationary seal ring 82 and forward and backward end cap 3,4 endoporus sealing, O RunddichtringO 85 is again with rotating ring 831 and 7 sealings of blade shaft axle sleeve, disc gland 86 disc of ining succession, and be fixed on the blade shaft axle sleeve 7 by jump ring 87, rotating ring 831, disc gland 86 are connected as a single entity by O RunddichtringO 85 with blade shaft axle sleeve 7, and the balance spring 84 in the disc gland 86 has played planar friction equilibrium of forces effect between natural adjusting rotary packing ring 83 and the stationary seal ring 82.
O RunddichtringO 81,85 of the present utility model is to be coated fluoroplastic and made by the inner ring of acid-resisting rubber material and outside.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the utility model, and be not with opposing qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claim conversion, the modification of the foregoing description.
Claims (8)
1. the mechanical seal structure of a Roots pump, it comprises the pump housing, blade shaft, front cover, rear end cover, protecgulum, bonnet, front-end bearing pedestal, rear bearing block, gear and lubricant oil, bearing is housed respectively in front-end bearing pedestal and the rear bearing block, it is characterized in that, be respectively equipped with mechanical seal between the cylindrical of the inner circle of described front cover and rear end cover and blade shaft axle sleeve, the external part of blade shaft axle sleeve is equipped with rotary packing ring, and the endoporus of front cover and rear end cover is equipped with stationary seal ring respectively.
2. the mechanical seal structure of Roots pump according to claim 1 is characterized in that, described stationary seal ring is by O RunddichtringO and the embedding mutually of the interior circle of front cover.
3. the mechanical seal structure of Roots pump according to claim 1 is characterized in that, described stationary seal ring is by O RunddichtringO and the embedding mutually of the interior circle of rear end cover.
4. the mechanical seal structure of Roots pump according to claim 1 is characterized in that, described rotary packing ring is become by rotating ring, O RunddichtringO, disc gland and balance cluster spring, and the disc gland is pressed and put on rotating ring and balance spring.
5. the mechanical seal structure of Roots pump according to claim 4 is characterized in that, described disc gland is fixed on the external part of blade shaft axle sleeve by jump ring.
6. the mechanical seal structure of Roots pump according to claim 4 is characterized in that, described disc gland and disc are made one.
7. the mechanical seal structure of Roots pump according to claim 1 is characterized in that, the external part of described blade shaft axle sleeve is four external parts.
8. the mechanical seal structure of Roots pump according to claim 1 is characterized in that, described O RunddichtringO coats fluoroplastic by the inner ring of acid-resisting rubber material and outside and makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670120U CN201330705Y (en) | 2009-01-15 | 2009-01-15 | Mechanical seal structure of Roots vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670120U CN201330705Y (en) | 2009-01-15 | 2009-01-15 | Mechanical seal structure of Roots vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330705Y true CN201330705Y (en) | 2009-10-21 |
Family
ID=41224083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200670120U Expired - Fee Related CN201330705Y (en) | 2009-01-15 | 2009-01-15 | Mechanical seal structure of Roots vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330705Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588287A (en) * | 2012-02-08 | 2012-07-18 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN102828953A (en) * | 2012-09-13 | 2012-12-19 | 无锡市四方真空设备有限公司 | Roots pump of mechanical sealing structure |
| CN105422447A (en) * | 2015-12-16 | 2016-03-23 | 淄博华舜耐腐蚀真空泵有限公司 | Corrosion resistant wet roots vacuum pump |
| CN105971925A (en) * | 2016-07-08 | 2016-09-28 | 上海通用风机股份有限公司 | Sealing device for antiseptic draught fan |
| EP2499374B1 (en) | 2009-11-11 | 2016-12-28 | Edwards Limited | Corrosion resistant shaft sealing for a vacuum pump |
| CN108757946A (en) * | 2018-08-14 | 2018-11-06 | 于阳徐 | Vacuum kneader mixing paddle axle flexible seal device |
-
2009
- 2009-01-15 CN CNU2009200670120U patent/CN201330705Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2499374B1 (en) | 2009-11-11 | 2016-12-28 | Edwards Limited | Corrosion resistant shaft sealing for a vacuum pump |
| CN102588287A (en) * | 2012-02-08 | 2012-07-18 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN102588287B (en) * | 2012-02-08 | 2014-11-05 | 奉化市釜用密封件有限公司 | Mechanical sealing parts of Roots blower and lubricating method thereof |
| CN102828953A (en) * | 2012-09-13 | 2012-12-19 | 无锡市四方真空设备有限公司 | Roots pump of mechanical sealing structure |
| CN102828953B (en) * | 2012-09-13 | 2014-11-26 | 无锡市四方真空设备有限公司 | Roots pump of mechanical sealing structure |
| CN105422447A (en) * | 2015-12-16 | 2016-03-23 | 淄博华舜耐腐蚀真空泵有限公司 | Corrosion resistant wet roots vacuum pump |
| CN105422447B (en) * | 2015-12-16 | 2017-09-22 | 淄博华舜耐腐蚀真空泵有限公司 | A kind of corrosion-resistant wet type Roots vaccum pump |
| CN105971925A (en) * | 2016-07-08 | 2016-09-28 | 上海通用风机股份有限公司 | Sealing device for antiseptic draught fan |
| CN108757946A (en) * | 2018-08-14 | 2018-11-06 | 于阳徐 | Vacuum kneader mixing paddle axle flexible seal device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20140115 |