CN202955025U - Desulphurization pump mechanical seal structure - Google Patents

Desulphurization pump mechanical seal structure Download PDF

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Publication number
CN202955025U
CN202955025U CN 201220618403 CN201220618403U CN202955025U CN 202955025 U CN202955025 U CN 202955025U CN 201220618403 CN201220618403 CN 201220618403 CN 201220618403 U CN201220618403 U CN 201220618403U CN 202955025 U CN202955025 U CN 202955025U
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CN
China
Prior art keywords
ring
seat
mechanical seal
stationary
seal structure
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Expired - Fee Related
Application number
CN 201220618403
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Chinese (zh)
Inventor
李长剑
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CHONGQING HUAIANTE MACHINERY EQUIPMENT Co Ltd
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CHONGQING HUAIANTE MACHINERY EQUIPMENT Co Ltd
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Priority to CN 201220618403 priority Critical patent/CN202955025U/en
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Publication of CN202955025U publication Critical patent/CN202955025U/en
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Abstract

The utility model discloses a desulphurization pump mechanical seal structure. The desulphurization pump mechanical seal structure comprises a shaft sleeve. A first movable ring seat and a static ring seat are sleeved outside the shaft sleeve, the first movable ring seat is arranged on one side of the static ring seat, a first movable ring is sleeved inside the first movable ring seat, and a first static ring, directly facing the first movable ring, is sleeved inside the static ring seat. End faces of the first movable ring and the first static ring are attached closely to form first-level end face seal. A second movable ring seat is sleeved outside the shaft sleeve and arranged on the other side of the static ring seat, a second movable ring is sleeved inside the second movable ring seat, and a second static ring, directly facing the second movable ring, is sleeved inside the static ring seat. End faces of the second movable ring and the second static ring are attached closely to form second-level end face seal. The desulphurization pump mechanical seal structure is reasonable in structure, simple and convenient to operate, high in economic benefit, low in maintenance cost, energy-saving and environment-friendly, and can solve the problems that a desulphurization system is large in solid-particle-laden concentration and chloride-ion-laden concentration and service life of circulating pump mechanical seal is short.

Description

The desulfur pump mechanical seal structure
Technical field
The utility model relates to a kind of desulfur pump, is specifically related to a kind of desulfur pump mechanical seal structure.
Background technique
Rapidly, wherein large-size thermal power plant has family more than 500 to the development of domestic thermal power plant.National industrial policies are more and more stricter to the requirement of environmental protection, particularly Thermal Power Generation Industry is carried out online the detection to desulphurization system, reduce the discharge of SO2, desulphurization system exists the phenomenons such as " choking with resentment ", " finding time ", " cavitation erosion " all the time containing concentration of solid particles and the larger desulfuration recycle pump seal chamber of chloride ion-containing concentration place, this dynamic and static friction pair that just causes mechanical seal is often in dry condition, easily cause the temperature of friction sharply to rise, cause friction pair to rupture suddenly, cause the mechanical seal global failure.
In addition, because the phenomenons such as " cavitation erosion ", " finding time ", " choking with resentment " occur, the phenomenons such as the vibrations of pump, axial float are also aggravated, and make mechanical sealing friction pairs wear and tear, rupture and lose efficacy.The reason of pump vibration is a lot, pump and motor decentraction is arranged, bearing fault, rotor unbalance etc., for mechanical seal, because the tracing ability of the mechanical seal of spring-compensating is poor, the vibration of pump has aggravated the separation of dynamic and static ring, under the effect that is separated in liquid film pressure of moment, make sealing surface open, increase leakage rate, and make solid particle enter sealing surface to cause sealing surface to destroy, spring blocking, the tracing ability of impact sealing, cause mechanical seal to lose efficacy.Can cause the seal ring fracture when the pump vibration is larger.Its direct harm to mechanical seal is exactly: make the seal face friction ring that dry friction easily occur and produce " dry combustion method " phenomenon, have a strong impact on the service time of mechanical seal.
The Chinese patent patent No. 200920216259 discloses a kind of " mechanical seal structure of flue gas desulfurization pump ".
This utility model patent the protection mechanical seal running environment; have some improvement, but this patent comes with some shortcomings, just some change on pump structure; when the phenomenon of pump appearance " cavitation erosion ", " finding time ", " choking with resentment ", the working life of mechanical seal is still limited.
The Chinese patent patent No. 200420020662 discloses a kind of " desulfur pump packaging type mechanical sealing element ".This utility model patent has some improvement in installation, debugging and maintenance, improved the installation precision, be convenient to dismounting, alleviated working strength, but just some change on pump structure of this patent, when the phenomenon of pump appearance " cavitation erosion ", " finding time ", " choking with resentment ", the working life of mechanical seal is still limited.
The Chinese patent patent No. 200920143628 discloses a kind of " Novel desulfuration pump ".This utility model patent the protection mechanical seal running environment; have some improvement; but just some change on pump housing material of this patent, the phenomenon when pump appearance " cavitation erosion ", " finding time ", " choking with resentment ", can't thoroughly solve mechanical seal limited problem in working life.
The shortcoming of prior art is: just on pump structure, changed, when the phenomenon of " cavitation erosion ", " finding time ", " choking with resentment " appears in pump, desulfur pump is appointed so can't realize that long period is without leaking running, and the life-span of mechanical seal is still limited.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of wear-corrosion resistance, realizes that the desulfur pump long period is without the desulfur pump mechanical seal structure that leaks running.
The technical solution of the utility model is as follows: include axle sleeve, be set with the first rotating seat and stationary seat outside described axle sleeve, and described the first rotating seat is positioned at a side of described stationary seat, on described the first rotating seat, inner sleeve has the first rotating ring, over against inner sleeve, the first stationary ring is arranged with the first rotating ring on described stationary seat, described the first rotating ring and the first stationary ring end face are close to the end face seal of formation one-level, its key is: described axle sleeve is set with the second rotating seat outward, this the second rotating seat is positioned at the opposite side of described stationary seat, on described the second rotating seat, inner sleeve has the second rotating ring, described stationary seat and the second rotating ring have the second stationary ring over against inner sleeve, described the second rotating ring and the second stationary ring end face are close to the end face seal of formation secondary.
Pass through thus one in front and one in back two cover mechanical seals composition double-face mechanical sealing structures of one-level end face seal and secondary end face seal, the sealing effect of desulfur pump mechanical seal is better like this, reduces the discharge of SO2, realizes that the equipment long period turns round without leaking.
Pocketed springs seal ring between described axle sleeve and the first rotating seat, spring sealed like this circle can provide good compensation for primary seal, auxiliary seal, the floatability of assurance primary seal.
Be provided with annular groove in described axle sleeve left part, described spring sealed circle inside portion is embedded in this annular groove, and lateral part is against on described the first rotating seat, and equipment connection is just more firm like this, better tightness.
Described spring sealed circle coats butterfly spring by synthetic rubber or teflon and forms, and adopts the butterfly spring assembly, so just is not subject to the impact of solid particle and impurity in the big or small and medium of the diameter of axle; In the situation that the vibration of pump aggravation, the separation of dynamic and static ring, under the effect that is separated in liquid film pressure of moment, make sealing surface open, increase leakage rate, and make solid particle enter sealing surface, the leakage be interrupted occurs, not there will be spring blocking yet, the tracing ability of impact sealing, cause mechanical seal to lose efficacy, and avoided Particle Blocking spring and the seal ring in the medium.
Described stationary seat is provided with spring mounting hole near the second stationary ring one end, in described spring mounting hole, spring is housed, described spring one end is against described spring mounting hole bottom, the other end is against on described the second stationary ring end face the second stationary ring push-tight, form the secondary end face seal with the second rotating ring, guaranteed the double seals structure.
Described stationary seat also is fixed with stop pin near the second stationary ring one end, described stop pin stretches in the anti-rotation pin-and-hole of described the second stationary ring end face, fix the second stationary ring by stop pin, make the second stationary ring well to rotate under the drive of desulfur pump, can not rotate voluntarily, increase the rationality of structure, further improve the performance of desulfur pump mechanical seal structure.
Described the second rotating seat is enclosed within described axle sleeve right part nail outside Cock screw, has further guaranteed the double seals structure, by the effect of two recessed end Cock screws of fluting, can be good at this structure is fixed on the pump shaft of desulfur pump convenient disassembly simultaneously.
Between described stationary seat and the pump housing, between described stationary seat and the second stationary ring, O-ring seals is housed, by O-ring seals compensating action, further guarantee the sealing of end face.
Radially have the sparge water inlet hole on described stationary seat and sparge water portals, cooling water enters by the sparge water inlet hole, through the sparge water outflow of portalling, cooling water washing through between one-level end face seal and secondary end face seal like this, reach cooling effect, the dry friction of having avoided the seal face friction ring to occur produces " dry combustion method " phenomenon, improves the working life of mechanical seal.
The hole heart line that described sparge water inlet hole and sparge water portal is 120 ° of angles, make like this flow of cooling water of the flushing between one-level end face seal and secondary end face seal more reasonable, can maximum efficiency reach cooling purpose, further reduce the generation of " dry combustion method " phenomenon, improve the working life of mechanical seal.
The beneficial effects of the utility model are: the utility model is rational in infrastructure, simple, convenient, economic benefit is high, maintenance cost is low, energy-saving and environmental protection, can solve desulphurization system containing concentration of solid particles and the larger desulphurization circulating pump mechanical sealing of chloride ion-containing concentration working life short problem.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
The structural representation that Fig. 2 is Fig. 1 medi-spring seal ring 9;
3 structural representations that Fig. 3 is stationary seat in Fig. 1;
The A that Fig. 4 is Fig. 3 is to view.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Desulfur pump mechanical seal structure as shown in Fig. 1 and Fig. 2 and Fig. 3 and Fig. 4, include axle sleeve 1, be set with the first rotating seat 2 and stationary seat 3 outside described axle sleeve 1, and described the first rotating seat 2 is positioned at a side of described stationary seat 3, on described the first rotating seat 2, inner sleeve has the first rotating ring 4, over against inner sleeve, the first stationary ring 5 is arranged with the first rotating ring 4 on described stationary seat 3, described the first rotating ring 4 and the first stationary ring 5 end faces are close to the end face seal of formation one-level, outer second rotating seat 6 that is set with of described axle sleeve 1, this the second rotating seat 6 is positioned at the opposite side of described stationary seat 3, on described the second rotating seat 6, inner sleeve has the second rotating ring 7, described stationary seat 3 and the second rotating ring 7 have the second stationary ring 8 over against inner sleeve, described the second rotating ring 7 and the second stationary ring 8 end faces are close to the end face seal of formation secondary, pocketed springs seal ring 9 between described axle sleeve 1 and the first rotating seat 2, be provided with annular groove in described axle sleeve 1 left part, described spring sealed circle 9 inside portions are embedded in this annular groove, lateral part is against on described the first rotating seat 2, described spring sealed circle 9 coats butterfly spring by synthetic rubber or teflon and forms, described stationary seat 3 is provided with spring mounting hole near the second stationary ring 8 one ends, spring 10 is housed in described spring mounting hole, described spring 10 1 ends are against described spring mounting hole bottom, the other end is against on described the second stationary ring 8 end faces, described stationary seat 3 also is fixed with stop pin 11 near the second stationary ring 8 ends, described stop pin 11 stretches in the anti-rotation pin-and-hole of described the second stationary ring 8 end faces, described the second rotating seat 6 is enclosed within described axle sleeve 1 right part outside Cock screw 12, between described stationary seat 3 and the pump housing, between described stationary seat 3 and the second stationary ring 8, O-ring seals is housed, radially have sparge water inlet hole 13 on described stationary seat 3 and sparge water portals 14, portal 14 hole heart line of described sparge water inlet hole 13 and sparge water is 120 ° of angles.
Working principle:
The utility model is work like this, and after mechanical seal installs, Cock screw 12 is tightened on axle, first opens sparge water, guarantees that there is water the mechanical seal the inside.Axle sleeve 1, butterfly spring seal ring 9, driving ring, the first rotating ring 4, the second rotating ring 7 rotates with axle, the gap sealing of rotation pump shaft and housing is converted into to the rotating ring of mechanical seal and the sealing between the stationary ring end face, 9 of butterfly spring seal rings can provide good compensation for the one-level end face seal, guarantee the floatability of primary seal, spring 10 provides good compensation for second level end face seal, guarantee the floatability of secondary seal, the high hardness that friction pair is selected, and high strength, the Hardmetal materials of shock-resistant load, the situation that also not there will be the seal ring fracture at the end face of mechanical seal, thereby realize that the equipment long period is without leaking running.
Although below by reference to the accompanying drawings preferred embodiment of the present utility model is described, but the utility model is not limited to above-mentioned embodiment, above-mentioned embodiment is only schematic rather than determinate, those of ordinary skill in the art is under enlightenment of the present utility model, under the prerequisite without prejudice to the utility model aim and claim, can make like multiple types and meaning, as: the means of fixation conversion of secondary end face seal and axle sleeve, the means of fixation conversion of axle sleeve and pump shaft, within such conversion such as pinch conversion that the water-cooling tube import and export are shown in all fall into protection domain of the present utility model.

Claims (10)

1. a desulfur pump mechanical seal structure, include axle sleeve (1), be set with the first rotating seat (2) and stationary seat (3) outside described axle sleeve (1), and described the first rotating seat (2) is positioned at a side of described stationary seat (3), the upper inner sleeve of described the first rotating seat (2) has the first rotating ring (4), described stationary seat (3) is upper has the first stationary ring (5) with the first rotating ring (4) over against inner sleeve, described the first rotating ring (4) and the first stationary ring (5) end face are close to the end face seal of formation one-level, it is characterized in that: outer the second rotating seat (6) that is set with of described axle sleeve (1), this the second rotating seat (6) is positioned at the opposite side of described stationary seat (3), the upper inner sleeve of described the second rotating seat (6) has the second rotating ring (7), described stationary seat (3) has the second stationary ring (8) with the second rotating ring (7) over against inner sleeve, described the second rotating ring (7) and the second stationary ring (8) end face are close to the end face seal of formation secondary.
2. desulfur pump mechanical seal structure according to claim 1, is characterized in that: pocketed springs seal ring (9) between described axle sleeve (1) and the first rotating seat (2).
3. desulfur pump mechanical seal structure according to claim 2, it is characterized in that: be provided with annular groove in described axle sleeve (1) left part, described spring sealed circle (9) inside portion is embedded in this annular groove, and lateral part is against on described the first rotating seat (2).
4. according to the described desulfur pump mechanical seal structure of claim 2 or 3, it is characterized in that: described spring sealed circle (9) coats butterfly spring by synthetic rubber or teflon and forms.
5. desulfur pump mechanical seal structure according to claim 1, it is characterized in that: described stationary seat (3) is provided with spring mounting hole near the second stationary ring (8) one ends, spring (10) is housed in described spring mounting hole, described spring (10) one ends are against described spring mounting hole bottom, and the other end is against on described the second stationary ring (8) end face.
6. according to the described desulfur pump mechanical seal structure of claim 1 or 5, it is characterized in that: described stationary seat (3) also is fixed with stop pin (11) near the second stationary ring (8) one ends, and described stop pin (11) stretches in the anti-rotation pin-and-hole of described the second stationary ring (8) end face.
7. desulfur pump mechanical seal structure according to claim 1, it is characterized in that: described the second rotating seat (6) is enclosed within described axle sleeve (1) right part outside Cock screw (12).
8. desulfur pump mechanical seal structure according to claim 6 is characterized in that: between described stationary seat (3) and the pump housing, between described stationary seat (3) and the second stationary ring (8), O-ring seals is housed.
9. desulfur pump mechanical seal structure according to claim 6 is characterized in that: radially have sparge water inlet hole (13) and sparge water portal (14) on described stationary seat (3).
10. desulfur pump mechanical seal structure according to claim 9 is characterized in that: the portal hole heart line of (14) of described sparge water inlet hole (13) and sparge water is 120 ° of angles.
CN 201220618403 2012-11-20 2012-11-20 Desulphurization pump mechanical seal structure Expired - Fee Related CN202955025U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220618403 CN202955025U (en) 2012-11-20 2012-11-20 Desulphurization pump mechanical seal structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220618403 CN202955025U (en) 2012-11-20 2012-11-20 Desulphurization pump mechanical seal structure

Publications (1)

Publication Number Publication Date
CN202955025U true CN202955025U (en) 2013-05-29

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Application Number Title Priority Date Filing Date
CN 201220618403 Expired - Fee Related CN202955025U (en) 2012-11-20 2012-11-20 Desulphurization pump mechanical seal structure

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122077A (en) * 2015-12-18 2016-11-16 安徽南方化工泵业有限公司 Anti-dry friction mechanical seals
CN108105145A (en) * 2016-11-25 2018-06-01 中广核工程有限公司 Nuclear power plant reactor cooling agent mechanical sealing device used for pump
CN108343635A (en) * 2017-01-22 2018-07-31 襄阳五二五化工机械有限公司 A kind of mechanical seal for pump suitable for the highly crystalline station of high-content

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122077A (en) * 2015-12-18 2016-11-16 安徽南方化工泵业有限公司 Anti-dry friction mechanical seals
CN108105145A (en) * 2016-11-25 2018-06-01 中广核工程有限公司 Nuclear power plant reactor cooling agent mechanical sealing device used for pump
CN108343635A (en) * 2017-01-22 2018-07-31 襄阳五二五化工机械有限公司 A kind of mechanical seal for pump suitable for the highly crystalline station of high-content
CN108343635B (en) * 2017-01-22 2023-11-07 襄阳五二五化工机械有限公司 Mechanical seal suitable for pump of high solid content high crystallization station

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130529

Termination date: 20131120