CN203395185U - Air pressure closed type mechanical seal - Google Patents
Air pressure closed type mechanical seal Download PDFInfo
- Publication number
- CN203395185U CN203395185U CN201320479302.2U CN201320479302U CN203395185U CN 203395185 U CN203395185 U CN 203395185U CN 201320479302 U CN201320479302 U CN 201320479302U CN 203395185 U CN203395185 U CN 203395185U
- Authority
- CN
- China
- Prior art keywords
- mechanical seal
- pressure
- pressure chamber
- gas
- stationary ring
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
The utility model discloses a mechanical sealing device with gas pressure served as initial closing force for a sealing surface. According to the mechanical sealing device, a stationary ring in the mechanical sealing serves as a compensation ring of the mechanical sealing; a pressure chamber is formed on the rear portion of the compensation ring (the stationary ring); a structure of an annular air cylinder is formed when the compensation ring (the stationary ring) is inserted into the pressure chamber; the gas pressure acts on the rear portion of the compensation ring (the stationary ring) through the pressure chamber due to the fact that gases with certain pressure are introduced into the pressure chamber, so that the gas pressure can serve as the initial closing pressure force for the sealing surface in the mechanical sealing.
Description
Technical field
The utility model relates to a kind of mechanical seal device, and what be specifically related to is a kind of mechanical seal device of gas pressure as the required first closure power of mechanical seal sealing surface of usining.
Background technique
Mechanical seal has that sealing is reliable, leakage rate is little, long service life, the advantage such as applied widely, has been widely used in the rotating equipment of the various required sealings such as all kinds of pumps, reactor.Therefore its performance and life-span directly affect and are determining the integral working of equipment, improve its performance and the life-span seems most important.
Mechanical seal is in running, and its required seal face first closure advocates to provide by being arranged on the elastic element (as Compress Spring) at mechanical seal compensated loop back.Therefore mechanical seal is in operation process, along with time history meeting produces following problem: (1) is because the required first closure power of the sealing surface of mechanical seal is provided by elastic element, and the elastic force that elastic element produces by compressive strain is difficult to act on uniformly on whole sealing surface, this will have influence on first closure power in the distribution of sealing surface, the local heel and toe wear that causes sealing surface, the sealability of mechanical seal is declined, the lost of life; (2) mechanical seal end surface can slowly wear and tear and the decrement of elastic element is diminished in running, and the elastic element in mechanical seal also can be because producing fatigue and permanent deformation in compressive state for a long time, thereby have influence on the work elastic force of elastic element, this will cause the required first closure power of seal face not enough, mechanical seal is produced and leak.The existence of these factors directly affects performance and the working life of mechanical seal.
In sum, develop a kind of can addressing the above problem, to improve the mechanical seal device in sealability, prolonged mechanical sealing working life, seem particularly important.
Summary of the invention
The purpose of this utility model is to overcome prior art deficiency, for the problems referred to above that produce in mechanical seal operation process, proposes a kind of air pressure closo mechanical seal device of gas pressure as seal face first closure power of usining.
The utility model addresses the above problem by the following technical programs.Main points of the present utility model are in mechanical seal, to abandon the prior elastic element (for example Compress Spring) that makes end face produce first closure power, use the gas (as nitrogen) with certain pressure instead and act on the compensated loop back of mechanical seal, with this, be used as the required first closure power of end face of mechanical seal.Its concrete structure is as follows: (1) is encircled the stationary ring of mechanical seal by way of compensation, and a pressure chamber is set at stationary ring back, and compensated loop is inserted to pressure chamber to form the structural type of a ring-type cylinder; (2) for example, by external adjustable source of the gas with pressure (nitrogen bottle adds reduction valve) cut-in pressure chamber, allow gas pressure act on compensated loop back by pressure chamber, make gas pressure as the required first closure power of mechanical seal end surface.
The utility model takes full advantage of the convenient adjusting of gas pressure and the uniform feature of pressure distribution, uses gas pressure as the required first closure power of mechanical seal end surface.Advantage of the present utility model and effect are: (1) is used gas pressure as the first closure power of mechanical seal end surface, make that mechanical seal seal face in operation process is stressed more evenly, sealing surface closure is better, the sealing surface concentrated wear of effectively having avoided seal face to cause due to unbalance stress.So not only can effectively improve the sealability of mechanical seal, and can prolonged mechanical the normal service life of sealing; (2) use gas pressure to replace prior elastic element elastic force as the first closure power of mechanical seal seal face, the required first closure power of seal face of mechanical seal can be regulated by changing the air pressure size of pressure chamber easily, and can carry out pressure monitoring by instrument, with regard to effectively having avoided, because sealing surface wear makes, elastic element decrement diminishes, elastic element produces permanent deformation and makes elastic force decline like this, and the seal face first closure power causing is not enough and the seal leakage problem of generation.So just can effectively ensure the normal operation of mechanical seal, thereby improve usability and the life-span of mechanical seal.
Accompanying drawing explanation
Fig. 1 is that structure of the present utility model is implemented schematic diagram.
In figure:
1, nitrogen bottle 2, reduction valve 3, pressure gauge 4, atmosphere end pressure chamber
5, atmosphere end compensated loop (media end stationary ring) 6, media end compensated loop (media end stationary ring)
7, media end pressure chamber.
Embodiment
The utility model is the improvement of carrying out for defect of the prior art, the characteristic having according to pressed gas itself designs, its concrete grammar is exactly that the stationary ring in mechanical seal is encircled by way of compensation, at compensated loop back, pressure chamber is set, make compensated loop insert the structural type that pressure chamber forms a circular cylinder, by introducing the gas with certain pressure to pressure chamber, make gas pressure act on compensated loop back by pressure chamber, with this, be used as the required first closure power of seal face in mechanical seal.
In accompanying drawing 1, provided the embodiment of the utility model in Double End integrated mechanical sealing, as shown in the figure, in this example, pressure gas source is the pressurized gas in nitrogen bottle 1, its pressure regulative mode is to regulate by reduction valve 2, the large I of pressure after adjusting shows by pressure gauge 3, and the certain pressure gas after regulating is introduced to pressure chamber (atmosphere end pressure chamber 4 and media end pressure chamber 7); Gas after pressure regulation acts on the back of compensated loop (atmosphere end compensated loop 5 and media end compensated loop 6) by pressure chamber (atmosphere end pressure chamber 4 and media end pressure chamber 7); Thereby reach, make gas pressure as the object of the required first closure power of the seal face of mechanical seal.
Claims (3)
1. a mechanical seal device, is characterized in that: in mechanical seal, the required first closure power of sealing surface is provided by gas pressure.
2. mechanical seal device according to claim 1, it is characterized in that: the stationary ring in mechanical seal is the compensated loop as mechanical seal, back at compensated loop (stationary ring) is provided with pressure chamber, to after compensated loop (stationary ring) insertion pressure chamber, can form the structural type of a circular cylinder, by the gas of certain pressure is introduced to pressure chamber, make gas pressure act on compensated loop (stationary ring) back, using to reach and make gas pressure as the object of the required first closure power of sealing surface in mechanical seal.
3. mechanical seal device according to claim 1, is characterized in that: the gas that is injected into pressure chamber comes from external gas source, and its gas pressure size can regulate and show by instrument through gas pressure controlling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479302.2U CN203395185U (en) | 2013-08-07 | 2013-08-07 | Air pressure closed type mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479302.2U CN203395185U (en) | 2013-08-07 | 2013-08-07 | Air pressure closed type mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203395185U true CN203395185U (en) | 2014-01-15 |
Family
ID=49906718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320479302.2U Expired - Fee Related CN203395185U (en) | 2013-08-07 | 2013-08-07 | Air pressure closed type mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203395185U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363118A (en) * | 2013-08-07 | 2013-10-23 | 石俊 | Air pressure closing type mechanical seal |
| CN109681637A (en) * | 2019-02-18 | 2019-04-26 | 东北大学 | A kind of daul-side dry round gas seal for screw vacuum dry pump |
-
2013
- 2013-08-07 CN CN201320479302.2U patent/CN203395185U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363118A (en) * | 2013-08-07 | 2013-10-23 | 石俊 | Air pressure closing type mechanical seal |
| CN109681637A (en) * | 2019-02-18 | 2019-04-26 | 东北大学 | A kind of daul-side dry round gas seal for screw vacuum dry pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 610083 No. 518 Longan Road, Jinniu hi tech Industrial Park, Sichuan, Chengdu Patentee after: Shi Jun Address before: 201811 Shanghai City, Jiading District Huating Zhen Wu dual No. 818 Patentee before: Shi Jun |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160119 Address after: 610083 No. 518 Longan Road, Jinniu hi tech Industrial Park, Sichuan, Chengdu province two Patentee after: Chengdu Hydro-mechanical Seal Co., Ltd. Address before: 610083 No. 518 Longan Road, Jinniu hi tech Industrial Park, Sichuan, Chengdu Patentee before: Shi Jun |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20160807 |