CN203770192U - Anti-scouring and anti-corrosion mechanical sealing device - Google Patents
Anti-scouring and anti-corrosion mechanical sealing device Download PDFInfo
- Publication number
- CN203770192U CN203770192U CN201320863262.1U CN201320863262U CN203770192U CN 203770192 U CN203770192 U CN 203770192U CN 201320863262 U CN201320863262 U CN 201320863262U CN 203770192 U CN203770192 U CN 203770192U
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- China
- Prior art keywords
- ring
- shaft sleeve
- sealing gland
- collar bush
- inner flange
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- Expired - Fee Related
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Abstract
The utility model discloses an anti-scouring and anti-corrosion mechanical sealing device which is characterized by comprising a sealing gland bush, a stationary ring, a rotating ring, a main shaft sheath, an internal blind flange and a short protecting shaft sleeve, wherein a pump shaft is sleeved with the main shaft sleeve, the inner blind flange and the sealing gland bush are arranged outside the main shaft sleeve in a sleeving manner, and a ring-shaped cavity is formed among the inner blind flange, the sealing gland bush and the outer wall of the main shaft sleeve; the stationary ring and the rotating ring are arranged inside the ring-shaped cavity, the stationary ring is tightly adhered to one end of the rotating ring, the other end of the stationary ring is fixed on the sealing gland bush through a spring, and the other end of the rotating ring is fixed on the main shaft sleeve; the short protecting shaft sleeve is arranged on the inner side end of the main shaft sleeve, and a reversed spiral groove is formed in the inner side end of the short protecting shaft sleeve. The anti-scouring and anti-corrosion mechanical sealing device provided by the utility model is compact in radial size, good in cleaning and cooling effects, can improve the work environment of a sealing surface, and is strong in adaptability and long in service life.
Description
Technical field
The utility model relates to mechanical seal device, refers in particular to and relates in petrochemical industry for sealing centrifugal pump, sharpens in deep-etching and hard grind a kind of antiscour and the corrosion resistant mechanical seal device that under the environment of erosion corrosion, use.
Background technique
Double End spring type mechanical sealing device is widely used in the fluid machinery chemical pump with turning round equipment of the industries such as oil refining, chemical industry.The core of mechanical seal is the condensate film stability of the sealing surface of seal ring, exist in actual applications at present various factors to affect sealing effect, relate in particular to hard grind and sharpen the mechanical seal device of the chemical centrifugal pump of erosion corrosion, the problem that mainly exists following industry to be difficult to overcome:
1, the internal gland of double seals, axle sleeve, dynamic and static ring are fully exposed in the medium that impeller side corrosivity is stronger, wherein contain the required tiny solid catalyst of grit impurity and technological process (also for characteristic is sharpened in hard grind), when pump main shaft is during at High Rotation Speed, because of under centrifugal action, tiny solid particle is illegally occupied in side medium dynamic and static ring inner radius, further enters sealing surface destruction sealing surface liquid film and makes seal failure.
2, further, the hard grind being thrown away is at a high speed sharpened and is washed away for a long time sealing flange end face, is broken into irregular honeycomb, punctures the main material of flange and enters sealing fluid seal failure.
3, because the poor difficulty of seal operation condition is high, the double seals that the import of having to is of a high price, but sealing effect or undesirable.
Model utility content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, a kind of radial dimension compactness is provided, rinse good cooling results, sealing surface working environment improves, the antiscour of strong adaptability and long service life and corrosion resistant mechanical seal device.
The technological scheme that the utility model is taked is as follows, a kind of antiscour and corrosion resistant mechanical seal device, it is characterized in that: comprise sealing gland, stationary ring, rotating ring, collar bush, inner flange lid and short protective shaft sleeve, wherein: described collar bush is enclosed within on pump shaft, above-mentioned inner flange lid and sealing gland are set in outside collar bush, and form annular housing between collar bush outer wall; Described stationary ring and rotating ring are arranged in above-mentioned annular housing, and one end of stationary ring and rotating ring is adjacent to mutually, and the other end of stationary ring is fixed on sealing gland by spring, and the other end of rotating ring is fixed on collar bush; Described short protective shaft sleeve is arranged on the medial extremity of collar bush, and the medial extremity of short protective shaft sleeve is provided with reverse acting spiral groove, short protective shaft sleeve with pump shaft rotation in case oppositely fed sheet of a media, stop hard grind in medium to be sharpened to enter sealed sides and impel cleansing medium to enter annular housing.
Preferably, described short protective shaft sleeve is set on pump shaft, and short protective shaft sleeve is fixed by pin and collar bush, and above-mentioned inner flange lid is set in the outside of short protective shaft sleeve, is connected with side medium nockbush between the two.
Preferably, described side medium nockbush is fixed on the internal diameter step hole of inner flange lid, spacing by jump ring; Between the internal diameter of above-mentioned side medium nockbush and the external diameter of short protective shaft sleeve, leave the gap that scope is 0.1-0.5mm, on the internal diameter of side medium nockbush, have at least two oblique circular grooves in road, the opening of this oblique circular groove is towards inner side, and when pump shaft High Rotation Speed, oblique circular groove forms dynamic resistance prevention particle and enters sealed sides.
Preferably, between described sealing gland and collar bush, be provided with atmospheric side restrictor ring.
Preferably, have flushing inlet hole and flushing and portal on described sealing gland, flushing inlet hole and flushing are portalled and are communicated with annular housing, and flushing medium enters annular housing through rinsing inlet hole, through rinsing the outflow of portalling.
Preferably, the outside of described collar bush is arranged with transmission ring, and transmission ring and collar bush are fixed on pump shaft by transmission screw, and transmission ring is spacing by transmission jump ring.
Preferably, described transmission ring is connected with sealing gland by positioning block, and above-mentioned positioning block is provided with groove, and this groove coordinates with the flange of sealing gland periphery.
Preferably, the outer end of described inner flange lid is fixed by set screw and sealing gland, the inner of inner flange lid is provided with carbide ring, and the external diameter of carbide ring is identical with the external diameter of inner flange lid, and the minimum diameter of internal diameter and inner flange lid is identical and be greater than the external diameter of short protective shaft sleeve.
Preferably, the outer cover of described inner flange lid and carbide ring is provided with pump seal cavity, and the inner side of pump seal cavity is provided with impeller, and impeller is fixed on pump shaft, and impeller throws away medium with the rotation of pump shaft.
The beneficial effects of the utility model are:
Advantage of the present utility model comprises: 1, axle sleeve is segmental structure, increases a short protective shaft sleeve in the inner side of collar bush, and short protective shaft sleeve is detachable installation, therefore only needs afterwards to change short protective shaft sleeve in wearing and tearing, has reduced maintenance difficulties, has saved cost; 2, the media end of short protective shaft sleeve is provided with reverse acting spiral groove, therefore in the time that short protective shaft sleeve rotates with pump shaft, can in medium, produce a thrust to the inside, thereby the hard grind whetstone in the medium inside stopping enters wearing and tearing sealed member in Seal cage; 3, on side medium nockbush, also have the oblique circular groove of multiple openings to side medium, therefore in the time of pump shaft High Rotation Speed, also produce a thrust to the inside, make the blocking effect of hard grind whetstone better thereby form double-deck thrust; 4, stationary ring provides stretch compensation by multiple springs, and both form elastic compensating assembly, and elastic compensating assembly is that state type is installed, spring is not subject to centrifugal forces affect, meanwhile, adopts multiple little springs uniform, its axial thrust profiles is more even, and the overall floatability of elastic compensating assembly is better; Little spring is positioned in spring eye uniform on sealing gland, compact structure, and spring state type is installed the impact of removal centrifugal force on stretch compensation.Spring is concealed simultaneously, and or not with medium contact, working environment does not improve; 5, a side of inner flange lid is provided with carbide ring, and the high-speed centrifugal that effectively the inner flange lid of protective medium side is not sharpened by solid hard grind washes away.
Brief description of the drawings
Fig. 1 is sectional view of the present utility model.
Fig. 2 is assembly structure schematic diagram of the present utility model.
Fig. 3 is perspective view of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1 to Figure 3, the technological scheme that the utility model is taked is as follows, a kind of antiscour and corrosion resistant mechanical seal device, it is characterized in that: comprise sealing gland 10, stationary ring 8, rotating ring 1, collar bush 3, inner flange lid 6 and short protective shaft sleeve 11, wherein: described collar bush 3 is enclosed within on pump shaft 0, above-mentioned inner flange lid 6 and sealing gland 10 are set in outside collar bush 3, and form annular housing between collar bush 3 outer walls; Described stationary ring 8 is arranged in above-mentioned annular housing with rotating ring 1, and stationary ring 8 is adjacent to mutually with one end of rotating ring 1, and the other end of stationary ring 8 is fixed on sealing gland 10 by spring 12, and the other end of rotating ring 1 is fixed on collar bush 3; Described short protective shaft sleeve 11 is arranged on the medial extremity of collar bush 3, the medial extremity of short protective shaft sleeve 11 is provided with reverse acting spiral groove, short protective shaft sleeve 11 rotate with pump shaft 0 in case oppositely fed sheet of a media, stop hard grind in medium to be sharpened to enter sealed sides and impel cleansing medium to enter annular housing.
Preferably, described short protective shaft sleeve 11 is set on pump shaft 0, and short protective shaft sleeve 11 is fixing with collar bush 3 by pin 4, and above-mentioned inner flange lid 6 is set in the outside of short protective shaft sleeve 11, is connected with side medium nockbush 20 between the two.
Preferably, described side medium nockbush 20 is fixed on the internal diameter step hole of inner flange lid 6, spacing by jump ring 21; Between the external diameter of the internal diameter of above-mentioned side medium nockbush 20 and short protective shaft sleeve 11, leave the gap that scope is 0.1-0.5mm, on the internal diameter of side medium nockbush 20, have at least two oblique circular grooves in road, the opening of this oblique circular groove is towards inner side, and when pump shaft 0 High Rotation Speed, oblique circular groove forms dynamic resistance prevention particle and enters sealed sides.
Preferably, between described sealing gland 10 and collar bush 3, be provided with atmospheric side restrictor ring 13.
Preferably, have and rinse inlet hole F1 and the flushing Q that portals on described sealing gland 10, rinse inlet hole F1 and the flushing Q that portals and is communicated with annular housing, flushing medium enters annular housing through rinsing inlet hole F1, through the flushing Q outflow of portalling.
Preferably, the outside of described collar bush 3 is arranged with transmission ring 14, and transmission ring 14 is fixed on pump shaft 0 by transmission screw 22 with collar bush 3, and transmission ring 14 is spacing by transmission jump ring 16.
Preferably, described transmission ring 14 is connected with sealing gland 10 by positioning block 17, and above-mentioned positioning block 17 is provided with groove, and this groove coordinates with the flange of sealing gland 10 peripheries.
Preferably, the outer end of described inner flange lid 6 is fixing with sealing gland 10 by set screw 7, the inner of inner flange lid 6 is provided with carbide ring 6B, the external diameter of carbide ring 6B is identical with the external diameter of inner flange lid 6, and the minimum diameter of internal diameter and inner flange lid 6 is identical and be greater than the external diameter of short protective shaft sleeve 11.
Preferably, the outer cover of described inner flange lid 6 and carbide ring 6B is provided with pump seal cavity 6C, and the inner side of pump seal cavity 6C is provided with impeller, and impeller is fixed on pump shaft 0, and impeller produces centrifugal force with the rotation of pump shaft 0 medium is thrown away.
Further, stationary ring 8 of the present utility model is state type, float and are installed on sealing gland 10 by O shape circle 9, and spacer medium and washing solution, stationary ring 8 tail ends provide stretch compensation by the spring 12 being evenly arranged in some spring eyes of sealing gland 10.Inner flange lid 6 connects by some set screws 7, and the sealing between inner flange lid 6 and sealing gland 10 between inner flange lid 6 and pump seal cavity 6C is realized by seal ring 19; A part for inner flange gland 6 puts in pump seal cavity 6C, in its side medium end-face hole, be inlaid with carbide ring 6B, carbide ring 6B external diameter is identical with inner flange lid 6 radial dimensions, its internal diameter is identical with inner flange lid 6 minimum diameters, both short protective shaft sleeve 11 external diameters of internal diameter have appropriate gap, to reach the object of reverse fed sheet of a media or to stop the hard grind whetstone in medium to enter sealed sides, also can impel clean washing solution to pass through annular space; Carbide ring 6B wear resistant corrosion resistant and flushing resistance are fabulous, have effectively protected sealing gland end face; The second medium and small gap of internal diameter step hole of inner flange lid 6 is equipped with side medium nockbush 20, side medium nockbush 20 is spacing by jump ring 21, prevented from rotating by stop pin, between side medium nockbush 20 internal diameters and short protective shaft sleeve 11, there is the gap of a monolateral 0.2mm, its internal diameter has the oblique circular groove of 3 road openings to side medium simultaneously, forms dynamic resistance and stop a large amount of particles to enter sealed sides when pump shaft 0 High Rotation Speed.
Further, rotating ring 1 passes through O type circle 2 floating assemblies in the hole of collar bush 3, provide power by driving pin, connect by screw 4 with the short protective shaft sleeve 11 of reverse acting spiral groove, between collar bush 3 and short protective shaft sleeve 11 and seal shaft, sealed by the 2nd O type circle 5 and the 3rd O type circle 5B respectively.Transmission ring 14 is assemblied in collar bush 3 cylindrical places, outside, provides power by some transmission screws 22, and its axial position is spacing by transmission jump ring 16; A whole set of sealing is caught on transmission ring 14 and sealing gland 10 by positioning block 17, forms a set of integrated mechanical sealing.
Further, the hole F2 shutoff being positioned on pump seal cavity of originally joining for double seals need not, F1 is for rinsing inlet hole, and washing solution is clean and the liquid compatible with medium, rinses after coolant seal end face through entering side medium behind space between side medium nockbush 20 and short protective shaft sleeve 11.
Further, above-mentioned rotating ring 1 material is silicon carbide, and stationary ring 8 is high strength graphite, and short protective shaft sleeve 11 is duplex stainless steel 2205, and carbide ring 6B is tungsten carbide of nickel-base, and O type circle and seal ring are the FFKM of being able to bear strong corrosion.
Embodiment of the present utility model just introduces its embodiment, does not lie in and limits its protection domain.The technician of the industry can make some amendment under the inspiration of the present embodiment, and the equivalence of doing according to the utility model the scope of the claims therefore all changes or modifies, and all belongs within the scope of the utility model Patent right requirement.
Claims (9)
1. an antiscour and corrosion resistant mechanical seal device, it is characterized in that: comprise sealing gland (10), stationary ring (8), rotating ring (1), collar bush (3), inner flange lid (6) and short protective shaft sleeve (11), wherein: described collar bush (3) is enclosed within on pump shaft (0), above-mentioned inner flange lid (6) and sealing gland (10) are set in outside collar bush (3), and form annular housing between collar bush (3) outer wall; Described stationary ring (8) is arranged in above-mentioned annular housing with rotating ring (1), stationary ring (8) is adjacent to mutually with one end of rotating ring (1), it is upper that the other end of stationary ring (8) is fixed on sealing gland (10) by spring (12), and the other end of rotating ring (1) is fixed on collar bush (3); Described short protective shaft sleeve (11) is arranged on the medial extremity of collar bush (3), the medial extremity of short protective shaft sleeve (11) is provided with reverse acting spiral groove, short protective shaft sleeve (11) with pump shaft (0) rotation in case oppositely fed sheet of a media, stop hard grind in medium to be sharpened to enter sealed sides and impel cleansing medium to enter annular housing.
2. a kind of antiscour according to claim 1 and corrosion resistant mechanical seal device, it is characterized in that: described short protective shaft sleeve (11) is set on pump shaft (0), short protective shaft sleeve (11) is fixing by pin (4) and collar bush (3), above-mentioned inner flange lid (6) is set in the outside of short protective shaft sleeve (11), is connected with side medium nockbush (20) between the two.
3. a kind of antiscour according to claim 2 and corrosion resistant mechanical seal device, is characterized in that: described side medium nockbush (20) is fixed on the internal diameter step hole of inner flange lid (6), spacing by jump ring (21); Between the external diameter of the internal diameter of above-mentioned side medium nockbush (20) and short protective shaft sleeve (11), leave the gap that scope is 0.1-0.5mm, on the internal diameter of side medium nockbush (20), have at least two oblique circular grooves in road, the opening of this oblique circular groove is towards inner side, and when pump shaft (0) High Rotation Speed, oblique circular groove forms dynamic resistance prevention particle and enters sealed sides.
4. a kind of antiscour according to claim 3 and corrosion resistant mechanical seal device, is characterized in that: between described sealing gland (10) and collar bush (3), be provided with atmospheric side restrictor ring (13).
5. a kind of antiscour according to claim 4 and corrosion resistant mechanical seal device, it is characterized in that: on described sealing gland (10), have and rinse inlet hole (F1) and rinse portal (Q), rinse inlet hole (F1) and rinse portal (Q) and be communicated with annular housing, flushing medium enters annular housing through rinsing inlet hole (F1), enters side medium or flow out through rinsing portal (Q) behind space between side medium nockbush (20) and short protective shaft sleeve (11).
6. a kind of antiscour according to claim 5 and corrosion resistant mechanical seal device, it is characterized in that: the outside of described collar bush (3) is arranged with transmission ring (14), transmission ring (14) is fixed on pump shaft (0) above with collar bush (3) by transmission screw (22), and transmission ring (14) is spacing by transmission jump ring (16).
7. a kind of antiscour according to claim 6 and corrosion resistant mechanical seal device, it is characterized in that: described transmission ring (14) is connected with sealing gland (10) by positioning block (17), above-mentioned positioning block (17) is provided with groove, and this groove coordinates with the flange of sealing gland (10) periphery.
8. according to a kind of antiscour described in any one in claim 1-7 and corrosion resistant mechanical seal device, it is characterized in that: the outer end of described inner flange lid (6) is fixing by set screw (7) and sealing gland (10), the inner of inner flange lid (6) is provided with carbide ring (6B), the external diameter of carbide ring (6B) is identical with the external diameter of inner flange lid (6), and the minimum diameter of internal diameter and inner flange lid (6) is identical and be greater than the external diameter of short protective shaft sleeve (11).
9. a kind of antiscour according to claim 8 and corrosion resistant mechanical seal device, it is characterized in that: the outer cover of described inner flange lid (6) and carbide ring (6B) is provided with pump seal cavity (6C), the inner side of pump seal cavity (6C) is provided with impeller, it is upper that impeller is fixed on pump shaft (0), and impeller produces centrifugal force with the rotation of pump shaft (0) medium is thrown away.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863262.1U CN203770192U (en) | 2013-12-26 | 2013-12-26 | Anti-scouring and anti-corrosion mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863262.1U CN203770192U (en) | 2013-12-26 | 2013-12-26 | Anti-scouring and anti-corrosion mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770192U true CN203770192U (en) | 2014-08-13 |
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ID=51287388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863262.1U Expired - Fee Related CN203770192U (en) | 2013-12-26 | 2013-12-26 | Anti-scouring and anti-corrosion mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770192U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170023A (en) * | 2015-08-11 | 2015-12-23 | 浙江明天机械有限公司 | Fly cutter apparatus of mixer granulator |
| CN105782124A (en) * | 2016-03-16 | 2016-07-20 | 武汉工程大学 | Spiral groove heat dissipation and pressure reduction device for high-temperature centrifugal pump |
| CN111692123A (en) * | 2020-05-09 | 2020-09-22 | 青海盐湖工业股份有限公司 | Double-end-face mechanical sealing device for pump |
| CN113217472A (en) * | 2021-06-30 | 2021-08-06 | 高道密封科技(苏州)有限公司 | Machine seal cooling structure, high-temperature hot water circulating pump with same and method |
-
2013
- 2013-12-26 CN CN201320863262.1U patent/CN203770192U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170023A (en) * | 2015-08-11 | 2015-12-23 | 浙江明天机械有限公司 | Fly cutter apparatus of mixer granulator |
| CN105782124A (en) * | 2016-03-16 | 2016-07-20 | 武汉工程大学 | Spiral groove heat dissipation and pressure reduction device for high-temperature centrifugal pump |
| CN111692123A (en) * | 2020-05-09 | 2020-09-22 | 青海盐湖工业股份有限公司 | Double-end-face mechanical sealing device for pump |
| CN113217472A (en) * | 2021-06-30 | 2021-08-06 | 高道密封科技(苏州)有限公司 | Machine seal cooling structure, high-temperature hot water circulating pump with same and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140813 Termination date: 20211226 |