CN201771742U - Liquid membrane mechanical sealing device for boiler feed pump - Google Patents
Liquid membrane mechanical sealing device for boiler feed pump Download PDFInfo
- Publication number
- CN201771742U CN201771742U CN2010202467720U CN201020246772U CN201771742U CN 201771742 U CN201771742 U CN 201771742U CN 2010202467720 U CN2010202467720 U CN 2010202467720U CN 201020246772 U CN201020246772 U CN 201020246772U CN 201771742 U CN201771742 U CN 201771742U
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Abstract
The utility model relates to the field of sealing devices for fluid medium delivery pipelines, in particular to a liquid membrane mechanical sealing device for a boiler feed pump, which comprises a stationary seal ring (1), a rotating seal ring (2), a rotating seal ring screw (3), a stationary seal ring seat (4) and a corrugated pipe (5). The liquid membrane mechanical sealing device is characterized in that n grooves (21) are arranged on the end surface of the rotating seal ring (2) which is slidably connected with the stationary seal ring (1), the grooves (21) are located at the edge of the end surface of the rotating seal ring (2), the width of an opening of each groove (21) is 1% to 40% of that of each of narrower surfaces of the stationary seal ring (1) and the rotating seal ring (2) which rotate relatively, and the depth of the opening of each groove (21) is 50% to 120% of the width of the opening of each groove (21). The liquid membrane mechanical sealing device is fine in lubricating property, low in friction coefficient and long in service life.
Description
Technical field
The utility model relates to flowing medium delivery line seal arrangement field, is specially a kind of liquid film mechanical sealing apparatus that is used for boiler feed pump.
Background technique
At present, the mechanical seal of using on the station boiler feed water pump both at home and abroad mostly is contact-type mechanical seal, the characteristics of contact-type mechanical seal are to form one to have only several molecule width, thickness at several microns liquid film between end face, and friction pair is slide relative under the boundary friction state.The operating mode characteristics of boiler feed water mechanical seal for pump are the rotating speed height, the temperature height, and pressure is big, and operating mode is abominable, because boiler feed pump high-temperature water vaporization pressure height is vaporized easily, is difficult to form effective liquid film simultaneously near seal face, and PV value allowable is lower.In this state, mechanical seal end surface easily produces too high temperature rise, thereby causes the aging of face deformation and auxiliary seal ring, and end wear is very fast relatively.Make mechanical seal early failue.
The model utility content
In order to overcome the defective of prior art, a kind of stable performance, strong, the long-life boiler feed water Sealing used for pump of sealing effect are provided, the utility model discloses a kind of liquid film mechanical sealing apparatus that is used for boiler feed pump.
The utility model reaches goal of the invention by following technical solution:
A kind of liquid film mechanical sealing apparatus that is used for boiler feed pump, comprise stationary ring, rotating ring, the rotating ring screw, corrugated header and bellows, moving ring sleeve is outside the neck flange of rotary sleeve flange-like termination and pass through the rotating ring screw on the flange chassis of rotary sleeve flange-like termination, rotational slide is connected one end of stationary ring with rotating ring, stationary ring and rotating ring constitute sealing friction pair, the other end of stationary ring is fixedlyed connected with corrugated header, corrugated header connects a bellows, it is characterized in that: on the rotating ring end face that is slidingly connected with stationary ring, have n groove, n is [2,20] interval interior positive integer, groove is positioned at the edge of rotating ring end face, connect positive n limit shape in the line formation rotating ring end face of each groove central point, groove is that the central angle of arc and arc is in that (0, π) in the scope, the sectional shape of groove is rectangle or arc, the width of groove notch be in counterrotating stationary ring and the rotating ring than 1%～40% of leptoprosopy face width, the degree of depth of groove notch is 50%～120% of a groove width of rebate.
The described liquid film mechanical sealing apparatus that is used for boiler feed pump, it is characterized in that: on the rotating ring end face that is slidingly connected with stationary ring, have n groove, n is [2,20] interval interior even number, the width of groove notch be in counterrotating stationary ring and the rotating ring than 1%～40% of leptoprosopy face width, the degree of depth of groove notch is 50%～120% of a groove width of rebate.
The described liquid film mechanical sealing apparatus that is used for boiler feed pump, it is characterized in that: the end face that is slidingly connected with stationary ring in two end faces of rotating ring, disk and groove circle two-part in described end face is divided into, interior disk is positioned at the central part of described end face, the groove circle is positioned at the outer ring of disk, in the face that interior disk and rotating ring and stationary ring are in contact with one another than the contact ring bandwidth of leptoprosopy be not less than than 1/3 of leptoprosopy width, the developed surface of groove circle is a waveform, described corrugated ripple honeybee and interior disk are on same plane, distance between described waveform crest and the trough is 0～50% of a rotating ring thickness, the quantity of described waveform crest is between 3～20, and described corrugated wave amplitude reduces from outside to inside gradually.
When the utility model uses, according to actual working environment, on the rotating ring end face that is slidingly connected with stationary ring, open several grooves, and the central angle of definite groove, width and the degree of depth, moving ring sleeve is also passed through the rotating ring screw on the flange chassis of rotary sleeve flange-like termination outside the neck flange of rotary sleeve flange-like termination, rotating ring has an end of groove, and rotational slide is connected with stationary ring, stationary ring and rotating ring constitute sealing friction pair, the other end of stationary ring is fixedlyed connected with corrugated header, and corrugated header connects a bellows.Like this when countershaft is implemented mechanical seal, the end face of sealing friction pair is evenly distributed with groove, can be the following environmental work of 6000r/min, groove has guaranteed that flow of fluid medium is fashionable stressed even relatively, in groove, form pressure stable, change fluid liquid film distribution situation between end face, thereby improve the action effect of flowing medium back-pressure, the even distributed architecture of groove guarantees the versatility of mechanical seal when different rotation direction.Groove is opened Wear on rotating ring.Perhaps the outer part at the rotating ring end face that is slidingly connected with stationary ring has corrugated groove circle, trough forms dynamic trough, like this when countershaft is implemented mechanical seal, when flowing medium is flowed through the rotating ring edge, enter seal face by dynamic trough, form stable liquid film pressure, can effectively reduce the friction factor of end face.
The beneficial effects of the utility model are: the boiler feed pump liquid film mechanical sealing is than contact-type mechanical seal, its liquid film back-pressure is bigger, liquid film stiffness is higher, has better lubricity, friction factor is lower, the ability of seal face antagonism static pressure fluctuation is also better, and significantly reduces the friction factor between seal face.The working life of prolonged mechanical sealing.The present invention can be applicable to nuclear power, chemical industry, thermal power generation etc. needs the industry of boiler, and progressively is generalized to the every field of using mechanical seal
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the schematic representation of stationary ring and rotating ring rotational slide junction surface in the utility model;
Fig. 3 is the plan view that the rotating ring of waveform groove circle is arranged in the utility model;
Fig. 4 be have in the utility model waveform groove circle rotating ring along the bus unfolded drawing;
Fig. 5 is the structural representation that the rotating ring of waveform groove circle is arranged in the utility model.
Embodiment
Below further specify the utility model by specific embodiment.
A kind of liquid film mechanical sealing apparatus that is used for boiler feed pump, comprise stationary ring 1, rotating ring 2, rotating ring screw 3, stationary seat 4 and bellows 5, as shown in Figure 1, concrete structure is: it is outer and be fixed on by rotating ring screw 3 on the flange chassis of rotary sleeve 6 flange-like terminations that rotating ring 2 is enclosed within the neck flange of rotary sleeve 6 flange-like terminations, 2 rotational slides are connected one end of stationary ring 1 with rotating ring, stationary ring 1 and rotating ring 2 constitute sealing friction pair, the other end of stationary ring 1 is fixedlyed connected with stationary seat 4, stationary seat 4 connects a bellows 5, as shown in Figure 2, on rotating ring 2 end faces that are slidingly connected with stationary ring 1, have n groove 21, n is [2,20] interval interior positive integer, present embodiment is got 6, groove 21 is positioned at the edge of rotating ring 2 end faces, connect regular hexagon in line formation rotating ring 2 end faces of each groove 21 central point, groove 21 is that the central angle of arc and arc is (0, π) in the scope, present embodiment is got 100 degree, the sectional shape of groove 21 can be rectangle or arc, present embodiment is got arc, the width of groove 21 notches is than 1%～40% of leptoprosopy face width in counterrotating stationary ring (1) and the rotating ring (2), concrete ratio and rotating speed, fluid medium pressure is relevant, rotating speed is big more, fluid medium pressure is big more, then width of rebate is more little, and present embodiment gets 30%, and the degree of depth of groove 21 notches is 50%～120% of groove 21 width of rebate.The degree of depth of present embodiment further groove 21 notches be groove 21 notches width 67%.
A kind of liquid film mechanical sealing apparatus that is used for boiler feed pump, comprise stationary ring 1, rotating ring 2, rotating ring screw 3, stationary seat 4 and bellows 5, as shown in Figure 1, concrete structure is: it is outer and be fixed on by rotating ring screw 3 on the flange chassis of rotary sleeve 6 flange-like terminations that rotating ring 2 is enclosed within the neck flange of rotary sleeve 6 flange-like terminations, 2 rotational slides are connected one end of stationary ring 1 with rotating ring, stationary ring 1 and rotating ring 2 constitute sealing friction pair, the other end of stationary ring 1 is fixedlyed connected with stationary seat 4, and stationary seat 4 connects a bellows 5.Rotating ring 2 is as Fig. 3～shown in Figure 5, the end face that is slidingly connected with stationary ring 1 in 2 two end faces of rotating ring, disk 22 and groove circle 23 two-part in described end face is divided into, interior disk 22 is positioned at the central part of described end face, groove circle 23 is positioned at the outer ring of disk 22, in the face that interior disk 22 and rotating ring (2) and stationary ring (1) are in contact with one another than the contact ring bandwidth of leptoprosopy be not less than than 1/3 of leptoprosopy width, present embodiment gets 1/3, the developed surface of groove circle 23 is a waveform, described corrugated ripple honeybee and interior disk 22 are on same plane, distance between described waveform crest and the trough is 0～50% of rotating ring 2 thickness, present embodiment gets 2%, the quantity of described waveform crest is between 3～20, and present embodiment is got 6.
Claims (3)
1. liquid film mechanical sealing apparatus that is used for boiler feed pump, comprise stationary ring (1), rotating ring (2), rotating ring screw (3), stationary seat (4) and bellows (5), the neck flange that rotating ring (2) is enclosed within rotary sleeve (6) flange-like termination also is fixed on the flange chassis of rotary sleeve (6) flange-like termination by rotating ring screw (3) outward, rotational slide is connected one end of stationary ring (1) with rotating ring (2), stationary ring (1) and rotating ring (2) constitute sealing friction pair, the other end of stationary ring (1) is fixedlyed connected with stationary seat (4), stationary seat (4) connects a bellows (5), it is characterized in that: have n groove (21) in (2) two end faces of rotating ring and on the end face that is slidingly connected of stationary ring (1), n is [2,20] interval interior positive integer, groove (21) is positioned at the edge of rotating ring (2) end face, connect positive n limit shape in line formation rotating ring (2) end face of each groove (21) central point, groove (21) is that the central angle of arc and arc is (0, π) in the scope, the sectional shape of groove (21) is rectangle or arc, the width of groove (21) notch be in counterrotating stationary ring (1) and the rotating ring (2) than 1%～40% of leptoprosopy face width, the degree of depth of groove (21) notch is 50%～120% of groove (a 21) width of rebate.
2. the liquid film mechanical sealing apparatus that is used for boiler feed pump as claimed in claim 1, it is characterized in that: have n groove (21) in (2) two end faces of rotating ring and on the end face that is slidingly connected of stationary ring (1), n is [2,20] interval interior positive integer, the width of groove (21) notch be in counterrotating stationary ring (1) and the rotating ring (2) than 1%～40% of leptoprosopy face width, the degree of depth of groove (21) notch be groove (21) notch width 50%～120%.
3. the liquid film mechanical sealing apparatus that is used for boiler feed pump as claimed in claim 1 or 2, it is characterized in that: in (2) two end faces of rotating ring and the end face that is slidingly connected of stationary ring (1), described end face is divided into interior disk (22) and groove circle (23) two-part, interior disk (22) is positioned at the central part of described end face, groove circle (23) is positioned at the outer ring of disk (22), in the face that interior disk (22) and rotating ring (2) and stationary ring (1) are in contact with one another than the contact ring bandwidth of leptoprosopy be not less than than 1/3 of leptoprosopy width, the developed surface of groove circle (23) is a waveform, described corrugated ripple honeybee and interior disk (22) are on same plane, distance between described waveform crest and the trough is 0～50% of rotating ring (a 2) thickness, the quantity of described waveform crest is between 3～20, and described corrugated wave amplitude reduces from outside to inside gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202467720U CN201771742U (en) | 2010-06-30 | 2010-06-30 | Liquid membrane mechanical sealing device for boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202467720U CN201771742U (en) | 2010-06-30 | 2010-06-30 | Liquid membrane mechanical sealing device for boiler feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201771742U true CN201771742U (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202467720U Expired - Lifetime CN201771742U (en) | 2010-06-30 | 2010-06-30 | Liquid membrane mechanical sealing device for boiler feed pump |
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| Country | Link |
|---|---|
| CN (1) | CN201771742U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791097A (en) * | 2014-02-28 | 2014-05-14 | 江苏大学 | Combination fluid dynamic pressure groove mechanical seal ring capable of automatically discharging particles |
| CN104633106A (en) * | 2014-12-12 | 2015-05-20 | 常熟市淼泉压缩机配件有限公司 | Dust-free sealing ring |
| CN109237041A (en) * | 2018-11-12 | 2019-01-18 | 沈阳北碳密封有限公司 | A kind of mechanically-sealing apparatus for high temperature easy vaporized medium |
-
2010
- 2010-06-30 CN CN2010202467720U patent/CN201771742U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791097A (en) * | 2014-02-28 | 2014-05-14 | 江苏大学 | Combination fluid dynamic pressure groove mechanical seal ring capable of automatically discharging particles |
| CN104633106A (en) * | 2014-12-12 | 2015-05-20 | 常熟市淼泉压缩机配件有限公司 | Dust-free sealing ring |
| CN109237041A (en) * | 2018-11-12 | 2019-01-18 | 沈阳北碳密封有限公司 | A kind of mechanically-sealing apparatus for high temperature easy vaporized medium |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110323 |
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| CX01 | Expiry of patent term |