CN102221090A - Mechanical seal with memory alloy spring protective device - Google Patents
Mechanical seal with memory alloy spring protective device Download PDFInfo
- Publication number
- CN102221090A CN102221090A CN2011101477813A CN201110147781A CN102221090A CN 102221090 A CN102221090 A CN 102221090A CN 2011101477813 A CN2011101477813 A CN 2011101477813A CN 201110147781 A CN201110147781 A CN 201110147781A CN 102221090 A CN102221090 A CN 102221090A
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- ring
- mechanical seal
- memory alloy
- spring
- alloy spring
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Abstract
The invention discloses a mechanical seal with a memory alloy spring protective device. The mechanical seal comprises a moving seal ring and a static ring; an O-shaped ring is arranged between a shaft sleeve installed on a main shaft and the main shaft; a moving seal ring seat embedded with the moving seal ring and a common spring are assembled on the shaft sleeve; an O-shaped ring is arranged between the moving seal ring seat and the shaft sleeve; an end cover provided with the static ring is connected with a transmission ring through a limit ring; the transmission ring and a fastened screw are fixed on the shaft sleeve through a clamp spring; an O-shaped ring is arranged between the static ring and the end cover; a catch spring is fixed on the shaft sleeve below the static ring; and the memory alloy spring is arranged between the catch spring and the moving seal ring seat. The mechanical seal provided by the invention has the beneficial effects of long service life and wide applications, and is convenient to install.
Description
Technical field
The present invention relates to a kind of rotary dynamic seal that is applied to machinery such as fluid machineries such as horizontal or vertical water pump and reactor stirrer, the band memory alloy spring protective gear mechanical seal under particularly a kind of operating conditions that is applicable to easy generation mechanical seal dry friction.
Background technique
Mechanical seal is as the critical component of fluid machinery, usually forbid that the dry friction working order takes place, and in the actual use of fluid machinery, some dry friction running state, be inevitably, and the dry friction of short time running just may damage mechanical seal, make it to lose efficacy, especially seal ring for hard-when disposing firmly.
At present, mechanical seal does not also solve dry friction running problem preferably, and common sealing means has two kinds: generally is exactly soft-hard configuration, prolongs dry friction working time by seal ring, but the very big uncertainty of existence; Another kind is a dry gas seals, but sealing has complicated service condition and expensive expense, can not be extensive use of.In a word, the dry friction of mechanical seal is turned round, and has restricted the application area of mechanical seal, becomes the technical problem of being badly in need of solution.
Summary of the invention
Defective and needs at the existing machinery sealing the invention provides the mechanical seal of a kind of band memory alloy spring protective gear.
To achieve these goals, the measure that the present invention taked is:
The mechanical seal of a kind of band memory alloy spring protective gear, comprise rotary packing ring and stationary ring, be installed in and be provided with O shape circle between axle sleeve on the main shaft and the main shaft, motive sealing ring seat and the common spring of inlaying rotary packing ring are assemblied on the axle sleeve, be provided with O shape circle between motive sealing ring seat and the axle sleeve, the end cap that stationary ring is housed is connected with transmission ring by limited ring, transmission ring is fixed on the axle sleeve by jump ring and Cock screw, be provided with O shape circle between stationary ring and the end cap, be fixed with catch spring on the axle sleeve of stationary ring below, be provided with memory alloy spring between catch spring and the motive sealing ring seat;
The material of described alloy spring is memory alloy (SMA);
The collection assembling structure is adopted in described mechanical seal;
The material of described limited ring is the PTFE high-abrasive material.
Beneficial effect of the present invention: solved mechanical seal because the dry friction running causes mechanical seal to damage the problem that lost efficacy; Whole mechanical seal structure is simply compact, installation easy to use; Can be by changing the end cap installation dimension, and be applicable to and be widely used the Seal cage of different sizes.
Description of drawings
Fig. 1, structural representation of the present invention.
Embodiment
The mechanical seal of a kind of band memory alloy spring protective gear, comprise rotary packing ring 6 and stationary ring 7, be installed in and be provided with O shape circle 2 between axle sleeve 1 on the main shaft and the main shaft, motive sealing ring seat 4 and the common spring 3 of inlaying rotary packing ring 6 are assemblied on the axle sleeve 1, be provided with O shape circle 5 between motive sealing ring seat 4 and the axle sleeve 1, the end cap 13 that stationary ring 7 is housed is connected with transmission ring 10 by limited ring 12, transmission ring 10 is fixed on the axle sleeve 1 by jump ring 11 and Cock screw 9, be provided with O shape circle 8 between stationary ring 7 and the end cap 13, be fixed with catch spring 14 on the axle sleeve 1 of stationary ring 7 belows, be provided with alloy spring 15 between catch spring 14 and the motive sealing ring seat 4; The material of described alloy spring 15 is memory alloy (SMA), because round trip memory alloy spring 15 is external, does not contact with medium, can adopt corrosion-resistant and resistant material not; The collection assembling structure is adopted in mechanical seal; The material of described limited ring 12 is the PTFE high-abrasive material, and sealing needn't be taken out after installing, and is simple and convenient.
During assembling, at first common spring 3 is sleeved on the axle sleeve 1, O shape circle 5 is put into the rotating ring insert assembly, moving ring assembly is installed on the axle sleeve, guarantee that the rotating seat shift fork cooperates with the axle sleeve upper groove, common spring 3 is positioned at the rotating seat endoporus, round trip memory alloy spring 15 is inserted in axle sleeve 1, catch spring 14 is installed, then with stationary ring 7 cover upper O-shape rings 8, the end cap 13 of packing into, and install on the axle sleeve 1, the dynamic and static ring sealing face is fitted, and again with limited ring 12, Cock screw 9 installs on the transmission ring 10, and the axle sleeve 1 of packing into, Cock screw 9 is aimed at the driving hole of axle sleeves 1, and last limited ring 12 is with after end cap 13 fully cooperates, with the driving hole of Cock screw 9 screw-in axle sleeves 1.During use, only need mechanical seal sleeve 1 is assembled on the equipment axis of application, screw the fixing bolt of mechanical seal end cap 13, assembling is finished.
Working principle of the present invention is: round trip memory alloy spring 15 with provide the common spring of applying power to dispose face-to-face to sealing surface; when seal ring rises to uniform temperature because of the dry friction running; deformation takes place in round trip memory alloy spring 15; and produce enough elastic force; overcome the applying power that common spring makes sealing surface; thereby; the frictional heat that reduces sealing surface produces; play protection mechanical seal effect; when temperature descends; the round trip memory spring is got back to contraction state, and common spring restitution is in the applying power of sealing surface.
Beneficial effect of the present invention: solved mechanical seal because the dry friction running causes mechanical seal to damage the problem that lost efficacy; Whole mechanical seal structure is simply compact, installation easy to use; Can be by changing the end cap installation dimension, and be applicable to and be widely used the annular seal space of different sizes.
The present invention can be applied to balanced type and unbalanced type mechanical seal and metal bellows and rubber bellows mechanical seal.
Claims (4)
1. band memory alloy spring protective gear mechanical seal; comprise rotary packing ring (6) and stationary ring (7); be installed in and be provided with O shape circle (2) between axle sleeve (1) on the main shaft and the main shaft; motive sealing ring seat (4) and the common spring (3) of inlaying rotary packing ring (6) are assemblied on the axle sleeve (1); be provided with O shape circle (5) between motive sealing ring seat (4) and the axle sleeve (1); the end cap (13) that stationary ring (7) are housed is connected with transmission ring (10) by limited ring (12); transmission ring (10) is fixed on the axle sleeve (1) by jump ring (11) and Cock screw (9); be provided with O shape circle (8) between stationary ring (7) and the end cap (13); it is characterized in that: be fixed with catch spring (14) on the axle sleeve (1) of stationary ring (7) below, be provided with memory alloy spring (15) between catch spring (14) and the motive sealing ring seat (4).
2. a kind of band memory alloy spring protective gear according to claim 1 mechanical seal is characterized in that: the material of described alloy spring (15) is a memory alloy.
3. a kind of band memory alloy spring protective gear according to claim 1 and 2 mechanical seal is characterized in that: the collection assembling structure is adopted in mechanical seal.
4. a kind of band memory alloy spring protective gear according to claim 3 mechanical seal is characterized in that: the material of described limited ring (12) is the PTFE high-abrasive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101477813A CN102221090A (en) | 2011-06-02 | 2011-06-02 | Mechanical seal with memory alloy spring protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101477813A CN102221090A (en) | 2011-06-02 | 2011-06-02 | Mechanical seal with memory alloy spring protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102221090A true CN102221090A (en) | 2011-10-19 |
Family
ID=44777726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101477813A Pending CN102221090A (en) | 2011-06-02 | 2011-06-02 | Mechanical seal with memory alloy spring protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102221090A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661394A (en) * | 2012-05-08 | 2012-09-12 | 丹东克隆集团有限责任公司 | Integrated mechanical sealing device |
| CN102678933A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | Transmission ring for mechanical sealing |
| CN103216623A (en) * | 2013-04-11 | 2013-07-24 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
-
2011
- 2011-06-02 CN CN2011101477813A patent/CN102221090A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678933A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | Transmission ring for mechanical sealing |
| CN102661394A (en) * | 2012-05-08 | 2012-09-12 | 丹东克隆集团有限责任公司 | Integrated mechanical sealing device |
| CN103216623A (en) * | 2013-04-11 | 2013-07-24 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
| CN103216623B (en) * | 2013-04-11 | 2015-05-13 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111019 |