CN202719140U - Mechanical sealing device - Google Patents
Mechanical sealing device Download PDFInfo
- Publication number
- CN202719140U CN202719140U CN 201220314352 CN201220314352U CN202719140U CN 202719140 U CN202719140 U CN 202719140U CN 201220314352 CN201220314352 CN 201220314352 CN 201220314352 U CN201220314352 U CN 201220314352U CN 202719140 U CN202719140 U CN 202719140U
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- CN
- China
- Prior art keywords
- housing
- ring
- mechanical seal
- compensation mechanism
- liner
- 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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Abstract
The utility model discloses a mechanical sealing device, which comprises a movable ring, a static ring matched with the movable ring, an auxiliary sealing part and an elasticity compensation mechanism, and also comprises a housing, wherein the static ring, the auxiliary sealing part and the elasticity compensation mechanism are arranged in the housing, the elasticity compensation mechanism comprises a liner fixedly arranged at the bottom of the housing, a metal bellows arranged on the liner, and a gasket propped against the metal bellows and fixedly arranged on the housing; the static ring is arranged above the gasket, the auxiliary sealing part is arranged below the static ring and located between the static ring and the housing, and the metal bellows can ensure that sealing surfaces can be reliably clung, so that the working conditions of the sealing surfaces can be improved, the sealing capability can be obviously improved; and the metal bellows is matched with the liner and the gasket to adjust the compression amount of the mechanical sealing device, in such a way, the different compression amounts generated by processing errors can be compensated, and the control and the assembly are convenient.
Description
Technical field
The utility model relates to a kind of mechanical seal device, more particularly, relates in particular to a kind of mechanical seal device for the Roots vacuum blower fan.
Background technique
Mechanical seal be by at least one pair of perpendicular to the end face of spin axis under the cooperation of the effect of hydrodynamic pressure and compensation mechanism elastic force (or magnetic force) and auxiliary seal, keep fitting and relative sliding and the device that prevents fluid leakage that consists of.Mechanical seal generally is comprised of four parts, and it comprises rotating ring and stationary ring, secondary seal, stretch compensation mechanism and driving component.The lubricant oil of present Roots vacuum blower fan is mechanical seal device with the employing of gas transport portion, and this mechanical seal device is single end face list wave plate spring pattern.Such mechanical seal surface of contact is narrow, and the pretension decrement is little, and compensation performance is relatively poor, often leaks easily after the operation of a period of time, makes lubricant oil and air scurry into vacuum system, affect degree of vacuum, and pump can burn out a bearing because losing oil.In addition, because every cover mechanical seal device causes maximum compressibility all different because of machining error, and for mechanical seal device is sealed, all mechanical seal device must be pressed onto the compression stop when assembling at every turn, so just can seal.The possibility that therefore certainly will cause assembling to lose efficacy, the decrement size Control is bad, is not the sealing surface of mechanical seal device is broken, be exactly that secondary seal is not pressed onto.A general Roots vacuum blower fan has the such mechanical seal device of 5 covers, and the mechanical seal device of unified this Roots vacuum blower fan of control is the ubiquitous difficult problem of present industry.
The model utility content
The purpose of this utility model is for above-mentioned the deficiencies in the prior art, provides a kind of novel structure and sealability strong mechanical seal device.
The technical solution of the utility model is achieved in that a kind of mechanical seal device, it comprises rotating ring, the stationary ring that cooperates with rotating ring, secondary seal and stretch compensation mechanism, described mechanical seal device also comprises a housing, stationary ring, secondary seal and stretch compensation mechanism all are assembled in this housing, stretch compensation mechanism comprises the liner that is fixed on housing bottom, be arranged on the metal bellows on the liner and be resisted against metal bellows and be fixed on packing ring on the housing, stationary ring is arranged on the top of packing ring, and secondary seal is arranged on the below of stationary ring and between stationary ring and housing.
Described housing is provided with a columniform through hole and centers on the annular host cavity of this through hole, and stationary ring, secondary seal and stretch compensation mechanism are arranged in this host cavity.
Described liner is L-type.
Described stationary ring comprises that the main part that is resisted against on the packing ring and autonomous body extend and give prominence to the sealed department of the host cavity of housing, and sealing section contacts with rotating ring, and secondary seal is arranged on the below of sealed department and between the sidewall of main part and host cavity.
Described rotating ring is provided with the cylindrical accepting hole that is communicated with through hole.
Described secondary seal adopts O type circle.
The utility model is by being provided with the housing that stationary ring, secondary seal and stretch compensation mechanism are fitted together, stretch compensation mechanism comprises the liner that is fixed on housing bottom, is arranged on the metal bellows on the liner and is resisted against metal bellows and is fixed on packing ring on the housing, stationary ring is arranged on the top of packing ring, secondary seal is arranged on the below of stationary ring and between stationary ring and housing, adopt metal bellows can guarantee that sealing surface fits reliably, improve the operating mode of sealing surface, improve significantly sealability; And metal bellows cooperates the decrement of regulating mechanical seal device jointly with liner, packing ring, and it is different to remedy like this decrement that machining error produces, and is convenient to control and installs.
Description of drawings
The utility model is described in further detail below in conjunction with the embodiment in the accompanying drawing, but do not consist of any restriction of the present utility model.
Fig. 1 is the cross-sectional schematic of the utility model mechanical seal device.
Fig. 2 is the structural representation of the metal bellows in the utility model mechanical seal device.
Among the figure: rotating ring 1, stationary ring 2, secondary seal 3, stretch compensation mechanism 4, housing 5, through hole 6, host cavity 7, liner 8, metal bellows 9, packing ring 10, main part 11, sealed department 12, accepting hole 13.
Embodiment
Consult shown in Figure 1, a kind of mechanical seal device of the utility model, it comprises rotating ring 1, the stationary ring 2 that cooperates with rotating ring 1, secondary seal 3, stretch compensation mechanism 4 and housing 5.This stationary ring 2, secondary seal 3 and stretch compensation mechanism 4 all are assembled in the housing 5.Mechanical seal device of the present utility model is useful in the Roots vacuum blower fan.
Stationary ring 2 is arranged on the top of packing ring 10.This stationary ring 2 comprises the main part 11 that is resisted against on the packing ring 10 and autonomous body 11 extends and the sealed department 12 of the host cavity 7 of outstanding housing 5.Sealing section 12 contacts with rotating ring 1, and both maintenances fit tightly the composition sealing surface can prevent dielectric leakage.Above-mentioned secondary seal 3 is actual to be arranged on the below of sealed department 12 and between the sidewall of main part 11 and host cavity 7.Described rotating ring 1 is provided with the cylindrical accepting hole 13 that is communicated with the through hole 6 of housing 5.The utility model stationary ring 2 is to be to make with alloyed steel with graphite manufacturing, rotating ring 1.
The utility model novel structure, convenient operation, good seal performance and solved the uppity problem of industry ubiquity, this mechanical seal device are worth in the industry cycle promoting and using.
Claims (6)
1. mechanical seal device, it comprises rotating ring, the stationary ring that cooperates with rotating ring, secondary seal and stretch compensation mechanism, it is characterized in that: described mechanical seal device also comprises a housing, stationary ring, secondary seal and stretch compensation mechanism all are assembled in this housing, stretch compensation mechanism comprises the liner that is fixed on housing bottom, is arranged on the metal bellows on the liner and is resisted against metal bellows and is fixed on packing ring on the housing, stationary ring is arranged on the top of packing ring, and secondary seal is arranged on the below of stationary ring and between stationary ring and housing.
2. mechanical seal device according to claim 1 is characterized in that: described housing is provided with a columniform through hole and around the annular host cavity of this through hole, stationary ring, secondary seal and stretch compensation mechanism are arranged in this host cavity.
3. mechanical seal device according to claim 2, it is characterized in that: described liner is L-type.
4. mechanical seal device according to claim 3, it is characterized in that: described stationary ring comprises main part and the autonomous body extension that is resisted against on the packing ring and the sealed department of giving prominence to the host cavity of housing, sealing section contacts with rotating ring, and secondary seal is arranged on the below of sealed department and between the sidewall of main part and host cavity.
5. mechanical seal device according to claim 4, it is characterized in that: described rotating ring is provided with the cylindrical accepting hole that is communicated with through hole.
6. mechanical seal device according to claim 1 is characterized in that: described secondary seal employing O type circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314352 CN202719140U (en) | 2012-06-29 | 2012-06-29 | Mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314352 CN202719140U (en) | 2012-06-29 | 2012-06-29 | Mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202719140U true CN202719140U (en) | 2013-02-06 |
Family
ID=47620964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220314352 Expired - Lifetime CN202719140U (en) | 2012-06-29 | 2012-06-29 | Mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202719140U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455456A (en) * | 2014-11-05 | 2015-03-25 | 中国航空动力机械研究所 | Fluid power sealing device |
| CN109141763A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | Auxiliary seal cushion rubber air tight test tooling in aviation graphite grazing |
| CN111237470A (en) * | 2020-03-24 | 2020-06-05 | 晋江市陆钢塑料机械有限公司 | External mechanical seal structure |
-
2012
- 2012-06-29 CN CN 201220314352 patent/CN202719140U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455456A (en) * | 2014-11-05 | 2015-03-25 | 中国航空动力机械研究所 | Fluid power sealing device |
| CN109141763A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | Auxiliary seal cushion rubber air tight test tooling in aviation graphite grazing |
| CN109141763B (en) * | 2017-06-27 | 2023-07-18 | 中国航发常州兰翔机械有限责任公司 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite seal |
| CN111237470A (en) * | 2020-03-24 | 2020-06-05 | 晋江市陆钢塑料机械有限公司 | External mechanical seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 515041 Guangdong province Shantou City Zhuchi gold Wai Bay Bridge Patentee after: GUANGDONG RASTAR SYNTHETIC MATERIAL Co.,Ltd. Address before: 515041 Zhongshan Shantou East Road East Bay bridge head, Guangdong Patentee before: SK Networks PS (Shantou) Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 515000 Guangdong city of Shantou province (Free Trade Zone) after a processing zone Guang'ao Jiang 521B room five layer Patentee after: XINGHUI CHEMICAL CO.,LTD. Address before: 515041 Guangdong province Shantou City Zhuchi gold Wai Bay Bridge Patentee before: GUANGDONG RASTAR SYNTHETIC MATERIAL Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 515071 No.37, Tongyang Road, free trade zone, Shantou City, Guangdong Province Patentee after: Xinghui environmental protection materials Co.,Ltd. Address before: 515000 Guangdong city of Shantou province (Free Trade Zone) after a processing zone Guang'ao Jiang 521B room five layer Patentee before: XINGHUI CHEMICAL Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130206 |