CN204729633U - Cool gas blower combination sealing system - Google Patents
Cool gas blower combination sealing system Download PDFInfo
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- CN204729633U CN204729633U CN201520311235.2U CN201520311235U CN204729633U CN 204729633 U CN204729633 U CN 204729633U CN 201520311235 U CN201520311235 U CN 201520311235U CN 204729633 U CN204729633 U CN 204729633U
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Abstract
The utility model discloses a kind of Cool gas blower combination sealing system, belongs to magnetic fluid rotary main shaft encapsulating method and device class, is applicable to the sealing of dielectric gas conveying under the conditions such as high temperature, high pressure and high rotating speed.This sealing is made up of magnetic conduction axle sleeve, comb tooth labyrinth seal shell, spiral seal shell, pole shoe, permanent magnet, retainer, gland, socket head screw, shell and seal ring etc., it is characterized in that annular tooth on comb tooth labyrinth seal shell and magnetic conduction axle sleeve form the labyrinth seal of comb tooth, the spiral chute that spiral seal shell and magnetic conductive axis put forms spiral seal, and the annular tooth that pole shoe, permanent magnet, magnetic fluid and magnetic conductive axis put forms magnet fluid sealing.Wherein the labyrinth seal of comb tooth plays decompression, and spiral seal plays cooling, makes the work of primary seal magnet fluid sealing more stable, improves the life-span of whole seal arrangement.
Description
Technical field
The utility model relates to magnetic fluid rotary main shaft technical field of sealing technology, is specifically related to a kind of Cool gas blower combination sealing system.
Background technique
Cool gas blower is a kind of pump class device of pump gas, the transmission main shaft of this pump mainly adopts dry gas seals at present, but have the following disadvantages: (1) dry gas seals must exist sealing running gas, and blanket gas is known from experience and is entered Seal cage and mix with medium, so for some special media, be not suitable for selecting the type to seal; (2) need relatively costly sealing auxiliary system (sealing gas balance sysmte), and overall manufacture cost is high, the bad maintenance of equipment.
Model utility content
The utility model overcomes the deficiencies in the prior art, provides one not need outside help gas, avoids foreign aid's gas and enters Seal cage and mix with medium, simultaneously easy to maintenance, reduces the Cool gas blower combination sealing system of cost.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of Cool gas blower combination sealing system, comprises magnet fluid sealing assembly, spiral seal shell, comb tooth labyrinth seal shell, magnetic conduction axle sleeve, axially locating block and is socketed in shell and the seal ring of described magnetic conduction axle sleeve outside; Be provided with comb tooth labyrinth seal shell in described shell, described shell one end is fixed with gland; The other end, by Flange joint, is fixed on seal chamber; Described comb tooth labyrinth seal shell is positioned at the media end near sealing gas, prevent circumference from rotating by the pin-and-hole on comb tooth labyrinth seal shell and the bayonet fittings on shell, described comb tooth labyrinth seal shell is provided with return-air hole, described return-air hole and the air outlet hole centering be arranged on shell; Described comb tooth labyrinth seal shell is provided with annular tooth; Spiral seal shell, between comb tooth labyrinth seal shell and magnet fluid sealing assembly, prevents circumference from rotating by the bayonet fittings on the pin-and-hole on spiral seal shell and comb tooth labyrinth seal shell; Described magnetic conductive axis puts and is provided with helical tooth, and the helical tooth that described spiral seal shell and described magnetic conductive axis put forms spiral seal; Described spiral seal shell is provided with the first hole, the second hole centering on described first hole and shell; Described spiral seal shell is provided with the 3rd hole, the 4th hole centering on described 3rd hole and shell.
Further technological scheme spiral seal shell is provided with the first Leak hole and the second Leak hole.
Further technological scheme shell is provided with the 5th hole.
Further technological scheme is that magnet fluid sealing assembly comprises magnetic conduction axle sleeve, the first pole shoe, the second pole shoe, permanent magnet, retainer and magnetic liquid; Described shell is provided with the first cooling water intake hole, the second cooling water intake hole, the first osculum and the second osculum; The groove of described first cooling water intake hole and described first pole shoe forms cooling water passage, and the groove of described second cooling water intake hole and described second pole shoe forms cooling water passage.
Further technological scheme is that magnetic conductive axis puts and is provided with the first one-sided bevel tooth and the second one-sided bevel tooth, and described first one-sided bevel tooth, the second one-sided bevel tooth and described second pole shoe, described first pole shoe, permanent magnet and magnetic fluid form magnetic fluid sealing structure.
The further technological scheme one that to be the annular tooth on comb tooth labyrinth seal shell be in rectangle, triangle, zigzag fashion.
The further helical tooth of technological scheme to be the helical tooth that magnetic conductive axis puts be backpitch.
Further technological scheme is helical tooth is rectangular coil tooth.
Further technological scheme is the rear portion that spiral seal shell is arranged on described comb tooth labyrinth seal shell; Described magnet fluid sealing assembly is arranged on the outside of described spiral seal shell.
Further technological scheme is that permanent magnet is arranged between described first pole shoe and the second pole shoe, and described retainer is arranged on outside described permanent magnet.
Lower mask body introduces sealing principle of the present utility model:
First the comb tooth labyrinth seal shell be located near dielectric gas end loads in shell, adopt transition fit, pass the power of coming by gland and carry out axial restraint, pin-and-hole on comb tooth labyrinth seal shell and the bayonet fittings on shell prevent circumference from rotating, ensure comb tooth labyrinth seal shell return-air hole and air outlet hole centering, because the labyrinth seal of comb tooth is not subject to the restriction of rotational speed and temperature, be non-contact seals simultaneously, friction power loss is minimum, increases the gas of the salable elevated pressures of comb number of teeth order.
Its sealing principle is that the laggard fascinated uterine cavity of throttling narrow slit flowing through comb tooth labyrinth seal shell from the pump chamber of high voltage terminal with high flow velocity when gas expands, the speed energy that gas flow formed through narrow slit is consumed with this, by this principle through repeatedly throttling and expansion produce resistance, stop gas to external leakage, thus reach the object of sealing.Because the method is not zero leakage sealing, so the pressure of comb tooth labyrinth seal shell outlet can be reduced on the one hand by the method, the gas revealed on a small quantity can reclaim by the return-air hole on the other hand on comb tooth labyrinth seal shell and air outlet hole, reduces the pressure of follow-up seal chamber.
What be positioned at pole shoe I (or claiming first pole shoe) centre of comb tooth labyrinth seal shell and magnet fluid sealing assembly is spiral seal shell, the spiral chute that it and magnetic conductive axis put forms spiral seal, same employing transition fit loads in shell, prevent circumference from rotating by the bayonet fittings on the pin-and-hole on spiral seal shell and comb tooth labyrinth seal shell, ensure the second hole centering on spiral seal shell first hole and shell simultaneously, consider axial symmetry, the 4th hole also centering on the 3rd hole now on rotating screw capsul and shell, spiral seal shell plays a part fixing on the one hand and compresses comb tooth labyrinth seal shell, the power transmitted by gland on the other hand carries out self axial restraint.Spiral seal is by the impact of spindle speed, when main shaft is static, consider to there is radial clearance between the spiral chute that magnetic conductive axis puts and spiral seal shell, cooling water enters the cavity of spiral seal shell flowed through the first hole on spiral seal shell by the 5th hole on shell and the second hole after, a part flows directly to the 4th hole shell from the hole, cavity bottom the 3rd of spiral seal shell, then flow out to outer tank; The first Leak hole opened from spiral seal shell after another part cooling water flow out of spiral seal shell cavity and the second Leak hole flow out, the 4th hole on shell flows out to outer tank, both the temperature of magnetic conduction axle sleeve and main shaft had been reduced, play cooling action, completely cut off again contacting of gas and magnetic fluid.As the spindle turns, cooling water enters the cavity of spiral seal shell flowed through the first hole on spiral seal shell by the 5th hole on shell and the second hole after, the now similar spiral chute pump of spiral chute, fluid is made to produce pressure head, pump inner fluid is stoped to leak, radial clearance is there is between the spiral chute put due to magnetic conductive axis and spiral seal shell, still have segment fluid flow to cross screw thread tooth top outwards to leak, now most of fluid directly flows directly to the 4th hole shell from the hole, cavity bottom the 3rd of spiral seal shell, then flows out to outer tank; The first Leak hole opened from spiral seal shell after another part cooling water flow out of spiral seal shell cavity and the second Leak hole flow out, the 4th hole on shell flows out to outer tank, equally both reduce the temperature of magnetic conduction axle sleeve and main shaft, play cooling action, completely cut off again contacting of gas and magnetic fluid.
Close external environment condition end is magnet fluid sealing assembly, be made up of magnetic conduction axle sleeve, pole shoe I, pole shoe II (or claiming the second pole shoe), permanent magnet, retainer and magnetic liquid, the first cooling water intake hole on shell and the pole shoe I of the second cooling water intake hole and magnet fluid sealing assembly, the groove of pole shoe II form cooling water passage, cooling water flows out from the first osculum shell and the second osculum after the cooling of magnet fluid sealing assembly, ensure that the stable operation of magnet fluid sealing.
Compared with prior art, the beneficial effects of the utility model are: the utility model does not need outside help gas, avoid foreign aid's gas to enter Seal cage and mix with medium, compensate for the deficiency of dry gas seals, be applicable to the various dielectric gas of pumping, fully achieve zero leakage, extend service life of equipment, easy to maintenance, reduce cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in detail.
As shown in Figure 1, according to an embodiment of the present utility model, the present embodiment discloses a kind of Cool gas blower combination sealing system, and it comprises the labyrinth seal of comb tooth, spiral seal, magnet fluid sealing, wherein labyrinth seal and spiral seal play auxiliary seal, and magnet fluid sealing plays primary seal effect.Consider that the pressure and temperature of the dielectric gas of actual fed is all higher, in design, have employed the measures such as decompression and cooling.
The present embodiment Cool gas blower combination sealing system, is made up of magnetic conduction axle sleeve 1, comb tooth labyrinth seal shell 2, spiral seal shell 6, pole shoe I 11, pole shoe II 16, permanent magnet 13, retainer 14, gland 17, socket head screw 18, shell 29, axially locating block 20 and seal ring 3 etc.
Comb tooth labyrinth seal shell 2 is provided with in shell 29, comb tooth labyrinth seal shell 2 is positioned at the media end near sealing gas, being coordinated with the pin 31 on shell 29 by the pin-and-hole 32 on comb tooth labyrinth seal shell 2 prevents circumference from rotating, and shell 29 one end is fixed with gland 17 by socket head screw 18; The other end, by Flange joint, is fixed on seal chamber; Seal ring 3 is positioned at the link position of flange and seal chamber, stops dielectric gas toward outward leakage; Axially locating block 20 is fixed on main shaft 30 by interference fit, prevents magnetic conduction axle sleeve 1 from moving axially; Comb tooth labyrinth seal shell 2 is provided with return-air hole 4, return-air hole 4 and air outlet hole 5 centering be arranged on shell; Comb tooth labyrinth seal shell 2 is provided with annular tooth; Concrete, annular tooth is the one in rectangle, triangle, zigzag fashion.
In one end of medium in pump chamber, comb tooth labyrinth seal shell 2 is loaded in shell 29, the power passed on spiral seal shell 6 by gland 17 is fixed comb tooth labyrinth seal shell 2, the laggard fascinated uterine cavity of throttling narrow slit flowing through comb tooth labyrinth seal shell 2 when pressurized gas expands, the speed energy that gas flow formed through narrow slit is consumed with this, by this principle through repeatedly throttling and expansion produce resistance, stop gas to external leakage, thus reach the object of sealing.Because the method is not zero leakage sealing, so the pressure of comb tooth labyrinth seal shell outlet can be reduced on the one hand by the method, the gas revealed on a small quantity can reclaim by the return-air hole 4 on the other hand on comb tooth labyrinth seal shell, reduces the pressure of follow-up seal chamber.
Spiral seal shell 6, between comb tooth labyrinth seal shell 2 and magnet fluid sealing assembly, to be coordinated with the pin 33 on comb tooth labyrinth seal shell 2 by the pin-and-hole 34 on spiral seal shell 6 and prevents circumference from rotating; The power transmitted by gland 17 is carried out axial compression and is fixed; Magnetic conduction axle sleeve 1 is provided with helical tooth 9,36, the helical tooth that spiral seal shell 6 and magnetic conductive axis put forms spiral seal; Spiral seal shell 6 is provided with the first hole, hole 7, first 7 and the second hole 8 centering on shell; Spiral seal shell 6 is provided with the 3rd hole, hole the 26, three 26 and the 4th hole 25 centering on shell.
Spiral seal shell 6 is also provided with the 6th hole 23 centering on the first Leak hole 24 and the second Leak hole 28, first Leak hole and shell, seven apertures in the human head 27 centering on the second Leak hole and shell.
When the temperature of sealing medium gas is higher, this can raise making the temperature of main shaft, thus have influence on the sealing effect of magnetic fluid, for this reason, spiral seal shell 6 is added at the rear portion of comb tooth labyrinth seal shell 2, spiral chute (or claiming helical tooth) 9 and 36 on it and magnetic conduction axle sleeve 1 forms spiral seal, and pass into cooling water main shaft is cooled, when main shaft is static, cooling water is by hole 10, the hole on shell the 5th, the first hole 7 on second hole 8 and spiral seal shell 6 enters spiral seal cavity, realize the cooling to main shaft 30, the water that a part is leaked is by the first Leak hole 24 and the second Leak hole 28 on spiral seal shell 6, the 6th hole 23 on shell, seven apertures in the human head 27 and the 4th hole 25 flow out to outer tank, both the temperature of magnetic conduction axle sleeve 1 and main shaft 30 had been reduced, play cooling action, completely cut off again contacting of gas and magnetic fluid, this sealing being magnetic fluid provides reliable condition.
As the spindle turns, cooling water enters the cavity of spiral seal shell flowed through the first hole 7 on spiral seal shell 6 by the 5th hole 10 on shell and the second hole 8 after, now spiral chute 9, 36 similar spiral chute pumps, fluid is made to produce pressure head, pump inner fluid is stoped to leak, due to the spiral chute 9 that magnetic conductive axis puts, radial clearance is there is between 36 and spiral seal shell 6, still have segment fluid flow to cross screw thread tooth top outwards to leak, now most of fluid directly flows directly to the 4th hole 25 shell from the hole 26, cavity bottom the 3rd of spiral seal shell 6, then outer tank is flowed out to, the first Leak hole 24 opened from spiral seal shell 6 after another part cooling water flow out of spiral seal shell cavity and the second Leak hole 28 flow out, the 4th hole 25 on shell 29 flows out to outer tank, equally both reduce the temperature of magnetic conduction axle sleeve and main shaft, play cooling action, completely cut off again contacting of gas and magnetic fluid.
In the outside of spiral seal shell 6, magnet fluid sealing assembly is installed, magnet fluid sealing assembly is made up of magnetic conduction axle sleeve 1, pole shoe I 11, pole shoe II 16, permanent magnet 13, retainer 14 and magnetic liquid, magnetic conduction axle sleeve 1 is provided with the first one-sided bevel tooth 35 and the second one-sided bevel tooth 19, first one-sided bevel tooth and the first pole shoe, permanent magnet and magnetic fluid form magnet fluid sealing, and the second one-sided bevel tooth and the second pole shoe, permanent magnet and magnetic fluid form magnet fluid sealing.
For guaranteeing in high-revolving situation, the heating value of magnetic fluid work is not too large, the first cooling water intake hole 12 on shell 29 and the second cooling water intake hole 15 form cooling water passage with the pole shoe I 11 of magnet fluid sealing assembly, the groove of pole shoe II 16, cooling water flows out from the first osculum 21 shell 29 and the second osculum 22 after the cooling of magnet fluid sealing assembly, ensure that the stable operation of magnet fluid sealing, thus achieve the zero leakage of sealing, prevent the poisonous medium gas sealed to the pollution of environment.The present embodiment is not only applicable to Cool gas blower, and is applicable to the sealing of carrying various dielectric gas.
Spoken of in this manual " embodiment ", " another embodiment ", " embodiment ", etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any one embodiment, what advocate is also drop in scope of the present utility model to realize this feature, structure or feature in conjunction with other embodiments.
Although the multiple explanatory embodiment here with reference to model utility is described the utility model, but, should be appreciated that, those skilled in the art can design a lot of other amendment and mode of execution, these amendments and mode of execution will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of the open claim of the application, multiple modification and improvement can be carried out to the constituent elements of subject combination layout and/or layout.Except the modification of carrying out constituent elements and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (10)
1. a Cool gas blower combination sealing system, comprises magnet fluid sealing assembly, spiral seal shell (6), magnetic conduction axle sleeve (1), axially locating block (20) and is socketed in the outside shell (29) of described magnetic conduction axle sleeve (1) and seal ring (3); It is characterized in that: be provided with comb tooth labyrinth seal shell (2) in described shell, described shell (29) one end is fixed with gland (17); The other end, by Flange joint, is fixed on seal chamber; Described comb tooth labyrinth seal shell (2) is positioned at the media end near sealing gas, being coordinated with the pin (31) on shell (29) by the pin-and-hole (32) in comb tooth labyrinth seal shell (2) prevents circumference from rotating, described comb tooth labyrinth seal shell (2) is provided with return-air hole (4), described return-air hole (4) and air outlet hole (5) centering be arranged on shell; Described comb tooth labyrinth seal shell (2) is provided with annular tooth; Spiral seal shell (6) is positioned between comb tooth labyrinth seal shell (2) and magnet fluid sealing assembly, to be coordinated prevent circumference from rotating by the pin-and-hole (34) on spiral seal shell (6) with the pin (33) in comb tooth labyrinth seal shell (2); Described magnetic conduction axle sleeve (1) is provided with helical tooth (9) and (36), and the helical tooth that described spiral seal shell (6) and described magnetic conductive axis put forms spiral seal; Described spiral seal shell (6) is provided with the first hole (7), described first hole (7) and the second hole (8) centering on shell; Described spiral seal shell (6) is provided with the 3rd hole (26), described 3rd hole (26) and the 4th hole (25) centering on shell.
2. Cool gas blower combination sealing system according to claim 1, is characterized in that described spiral seal shell (6) is provided with the first Leak hole (24) and the second Leak hole (28).
3. Cool gas blower combination sealing system according to claim 1, is characterized in that described shell being provided with the 5th hole (10).
4. Cool gas blower combination sealing system according to claim 1, is characterized in that described magnet fluid sealing assembly comprises magnetic conduction axle sleeve (1), the first pole shoe (11), the second pole shoe (16), permanent magnet (13), retainer (14) and magnetic liquid; Described shell is provided with the first cooling water intake hole (12), the second cooling water intake hole (15), the first osculum (21) and the second osculum (22); Described first cooling water intake hole (12) forms cooling water passage with the groove of described first pole shoe (11), and described second cooling water intake hole (15) forms cooling water passage with the groove of described second pole shoe (16).
5. Cool gas blower combination sealing system according to claim 4, it is characterized in that described magnetic conduction axle sleeve (1) being provided with the first one-sided bevel tooth and the second one-sided bevel tooth, described first one-sided bevel tooth, the second one-sided bevel tooth and described second pole shoe, described first pole shoe, permanent magnet and magnetic fluid form magnetic fluid sealing structure.
6. Cool gas blower combination sealing system according to claim 1, the annular tooth that it is characterized in that in described comb tooth labyrinth seal shell (2) is the one in rectangle, triangle, zigzag fashion.
7. Cool gas blower combination sealing system according to claim 1, the helical tooth (9,36) that it is characterized in that on described magnetic conduction axle sleeve (1) is the helical tooth of backpitch.
8. the Cool gas blower combination sealing system according to claim 1 or 7, is characterized in that described helical tooth (9,36) is rectangular coil tooth.
9. Cool gas blower combination sealing system according to claim 1, is characterized in that described spiral seal shell (6) is arranged on the rear portion of described comb tooth labyrinth seal shell (2); Described magnet fluid sealing assembly is arranged on the outside of described spiral seal shell (6).
10. Cool gas blower combination sealing system according to claim 4, it is characterized in that described permanent magnet (13) is arranged between described first pole shoe (11) and the second pole shoe (16), described retainer (14) is arranged on described permanent magnet (13) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311235.2U CN204729633U (en) | 2015-05-14 | 2015-05-14 | Cool gas blower combination sealing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311235.2U CN204729633U (en) | 2015-05-14 | 2015-05-14 | Cool gas blower combination sealing system |
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| CN204729633U true CN204729633U (en) | 2015-10-28 |
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| CN201520311235.2U Active CN204729633U (en) | 2015-05-14 | 2015-05-14 | Cool gas blower combination sealing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864099A (en) * | 2015-05-14 | 2015-08-26 | 自贡兆强密封制品实业有限公司 | Combined seal system for cold gas blower |
| CN105834013A (en) * | 2016-06-01 | 2016-08-10 | 李波 | Pen-making centrifugal machine |
| CN112360987A (en) * | 2020-11-06 | 2021-02-12 | 西华大学 | Magnetic fluid sealing device for centrifugal compressor |
-
2015
- 2015-05-14 CN CN201520311235.2U patent/CN204729633U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864099A (en) * | 2015-05-14 | 2015-08-26 | 自贡兆强密封制品实业有限公司 | Combined seal system for cold gas blower |
| CN105834013A (en) * | 2016-06-01 | 2016-08-10 | 李波 | Pen-making centrifugal machine |
| CN112360987A (en) * | 2020-11-06 | 2021-02-12 | 西华大学 | Magnetic fluid sealing device for centrifugal compressor |
| CN112360987B (en) * | 2020-11-06 | 2021-06-11 | 西华大学 | Magnetic fluid sealing device for centrifugal compressor |
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