CN202955019U - Mechanical sealing device for low-density volatile medium - Google Patents
Mechanical sealing device for low-density volatile medium Download PDFInfo
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- CN202955019U CN202955019U CN 201220660250 CN201220660250U CN202955019U CN 202955019 U CN202955019 U CN 202955019U CN 201220660250 CN201220660250 CN 201220660250 CN 201220660250 U CN201220660250 U CN 201220660250U CN 202955019 U CN202955019 U CN 202955019U
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- sealing device
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Abstract
The utility model discloses a mechanical sealing device for low-density volatile medium. The mechanical sealing device for the low-density volatile medium comprises a pressure cover, a main sealing device, a safety sealing device and a shaft sleeve, wherein a convex ring is arranged in the middle of the outer wall of the shaft sleeve; the pressure cover is coaxially sleeved on the shaft sleeve; a middle extending part and a right-end extending part are arranged on the inner wall of the pressure cover; the convex ring is arranged on the left side of the middle extending part; the safety sealing device is arranged on the left side of the convex ring; the main sealing device is arranged on the right side of the middle extending part of the pressure cover; the right-end extending part of the pressure cover extends rightwards in a stepped manner; a clearance space is formed between the inner wall of the step-shaped right-end extending part and a static ring of a main seal, and between the inner wall of the step-shaped right-end extending part and a movable ring of the main seal respectively; a main seal flushing port is formed in the pressure cover; and the main seal flushing port is formed in the left side of the main seal. When flushing fluid flows through the clearance spaces between the right-end extending part of the pressure cover and the static ring of the main seal, and between the right-end extending part and the movable ring of the main seal, the medium can be prevented from diffusing towards a pump inlet, so that flash evaporation of the sealing surface is avoided; and moreover, the flushing fluid further can be used for uniformly flushing the end surface of the main seal, so that the lubricating performance of the end surface of the main seal is optimized.
Description
Technical field
The utility model relates to a kind of mechanical seal device, relates in particular to a kind of mechanical seal device for low density effumability medium.
Background technique
In the oil refining industry, hydrocarbon is a series of materials that carbon, two kinds of elements of hydrogen mix with different ratios, and wherein the lighter part of density, just be called lighter hydrocarbons.The Main Ingredients and Appearance of liquefied petroleum gas (LPG) is carbon 3, carbon 4, is at normal temperatures and pressures gaseous state, is the gaseous state lighter hydrocarbons.The hydrocarbon of C5-C16 is liquid at normal temperatures and pressures, claims again liquid light hydrocarbon.In liquid light hydrocarbon, the lightest part is C5, C6, heavier any part is exactly gasoline, kerosene and diesel oil etc.C2, C3, C4 hydrocarbon etc. can form liquid hydrocarbon under certain pressure, ethane, propane, butane, propylene etc. as liquefaction, have low-gravity, volatile, inflammable and explosive, boiling point is low, liquefaction pressure is high, permeability is high and the characteristics such as poor lubricity.Other medium also has similar characteristics as liquefied ammonia, uses the dangerous medium of centrifugal pump this class of safe transport, and the reliability of sealing is extremely important.
Varied for the seal style of this low density effumability flowing medium, the mechanical seals such as single end face, tandem Double End, stretch compensation assembly are rotary, state type are arranged, its core is the stability that keeps the seal face liquid film.If there are the phenomenons such as the cooling rinse-system circulation of sealing is not smooth, the sealing surface thermal diffusivity is bad, can cause liquid film flash distillation, sealing surface dry friction, impact seals working life, and even more serious meeting causes security incident.Such as being generally single-point, traditional flushing certainly rinses or one week aperture multi-point flushing, from pump discharge or first order impeller from washing solution, in the situation that there is no spatial constraints, because of seal chamber, to approach pump inlet pressure lower, the medium that can cause low density easily to be vaporized spreads rapidly to pump intake, easily near the seal face external diameter, form air accumulation, be difficult to lead away frictional heat, sealing surface is understood flash distillation and is formed dry running.The professional person is also exploring better seal style better to adapt to the pumping of this class medium at present.
The model utility content
The purpose of this utility model is to provide a kind of mechanical seal device for low density effumability medium.
A kind of mechanical seal device for low density effumability medium provided according to the utility model, comprise gland, main sealing device, safety sealing device and axle sleeve; The middle part of axle sleeve outer wall has bulge loop, and the left side of this bulge loop has circular groove; The coaxial heart of gland is sheathed on axle sleeve, and the gland inwall has middle extension part and right-hand member extension part, extension part left side in the middle of bulge loop is positioned at; The coaxial heart of safety sealing device is sheathed on the bulge loop left side of axle sleeve, comprise the first static components and the first rotating ring, the first static components comprises bellows component and the first stationary ring, the first stationary ring is embedded in the right-hand member of bellows component, the left end of the first static components is fixed in the left end of gland, and the first rotating ring is loaded in the circular groove of described bulge loop; Main sealing device comprises the second static components and the second rotating ring, the second static components comprises the second stationary ring, the middle extension part right side of gland is around being evenly distributed in some spring eyes, and be connected to the second static components by the spring of being located in spring eye, also be provided with stop pin between the second static components and described middle extension part, and the second rotating ring is fixed on axle sleeve; The right-hand member extension part of gland is stepped to be extended to the right, and the inwall of this stair-stepping right-hand member extension part forms clearance space respectively and between the second stationary ring outer wall and the second rotating ring outer wall; The left end of axle sleeve has the restraining groove of an annular, is arranged with some prepackage plates in this restraining groove, and prepackage plate one end is fixed in the gland left end; There is security seal on gland and rinse entrance, security seal rinses outlet and primary seal rinse mouth, security seal rinses outlet and is positioned at the safety sealing device position, and security seal rinses the bulge loop right positions that entrance is positioned at axle sleeve, and the primary seal rinse mouth is positioned at the second static components leftward position.
Its beneficial effect is: 1, safety sealing device has the bellows component that state type is installed, and the stretch compensation part of main sealing device is some little springs that state type is installed, and therefore, sealing surface face pressure, liquid film are stablized, and can be adapted to high-speed working condition; The revolving part of main sealing device and security seal is less, can reduce heat of stirring, thereby reduces the possibility of seal face flash distillation.2, comparing traditional single-point rinses or multi-point flushing, the right-hand member extension part of gland respectively and the annular clearance space formed between the second stationary ring outer wall and the second rotating ring outer wall, when washing solution is flowed through this clearance space, not only can stop the medium that low density is easily vaporized to spread and cause the sealing surface flash distillation rapidly to pump intake, and can 360 ° of uniform ring rinse around the second stationary ring and the second rotating ring, optimized the greasy property of seal face.3, there is an independent closed chamber between main sealing device and safety sealing device, can judge whether main sealing device and safety sealing device exist leakage by the force value detected in the sealing formula.4, the prepackage plate makes the sealing device form an integrated sealing structure, is conducive to improve precision and simplifies dismounting.
A kind of optimal way, be fixed with flow guide sleeve on the middle extension part inwall of described gland, the left end of this flow guide sleeve has the convex edge of extension, this convex edge is fixed in the left end of described middle extension part hermetically, in the middle of making, the outer wall of the inwall of extension part and flow guide sleeve forms clearance space, described security seal rinses the left position that entrance is positioned at this clearance space, and there is clearance space between flow guide sleeve inwall and axle sleeve, and the outer wall of the axle sleeve of corresponding flow guide sleeve position has the first pump efficiency ring, and the bulge loop outer wall of axle sleeve has the second pump efficiency ring.
Its beneficial effect is: the washing solution that security seal rinses entrance enters from the left end of flow guide sleeve outer wall, flow through after twice pressurization of main sealing device inside by the first pump efficiency ring on axle sleeve and the second pump efficiency ring and import the safety sealing device outside, and rinsing outlet from security seal, to send the sealing flow container back to cooling, this loop structure can carry out cooling to main sealing device and safety sealing device simultaneously, and greatly improved the cycle efficiency of washing solution, abundant coolant seal end face, prevent the liquid film flash distillation of seal face, improve the reliability of sealing.
A kind of optimal way, the end face outer radius of described the second stationary ring has the first arc groove be uniformly distributed along the circumference, and the end face inner radius has second arc groove corresponding with the first arc groove, and each first arc groove interval of the second stationary ring end face is evenly equipped with the rectangular deep gouge that two ends are circular arc, and this deep gouge is near internal diameter one side.
Its beneficial effect is: when pumping low density effumability medium (particularly lighter hydrocarbons), the sealing fluid of the medium of seal ring outside and seal ring inside is liquid state, and the pressure of medium one side is higher, and sealing fluid one side is normal pressure or with no pressure in theory, therefore, the external diameter of the end face of seal ring exists from the pressure decline of the with no pressure of being pressed onto is arranged to internal diameter, and seal ring exists from the pure liquid film in outer radial, along with successively decreasing of pressure, frictional heat due to the sealing surface generation, can cause the liquid film temperature to raise, vaporization phenomenon appears when higher than critical temperature, in the situation that there is pressure reduction in the seal ring internal-and external diameter, vaporization zone can continue to spread to the seal ring inner radius, cause occurring vapour-liquid binary states zone.And the purer liquid state of vapour-liquid binary states or the pure steam state of sealing surface are the most unstable.Therefore, after the end face external diameter of the second stationary ring arranges the first arc groove, when the second rotating ring rotation, liquid medium produces the fluid wedge dynamic pressure, medium is squeezed into seal face, generation has the pure liquid film of certain rigidity, brings subsequently the cooled region of a similar comet tail, and the seal face Liquid region is cooled; In the zone that approaches the seal face internal diameter, pressure medium successively decreases and is almost normal pressure, naturally there will be the vapour phase zone, and now the second arc groove of the second stationary ring is brought sealing fluid near the seal face internal diameter into, forms stable liquid film zone; And the deep gouge zone was vapour-liquid binary states district originally, lubricating status is poor, and under inner fluid effect and centrifugal action, partially liq is converged in deep gouge, can reduce the temperature in this vapour-liquid binary states district, improves lubricating status.The end-face structure of the second stationary ring has been optimized seal face.
A kind of optimal way, described the second rotating ring is fixed on axle sleeve by a rotating seat, the rotating seat left side has interior heavy stand, the second rotating ring is loaded in the interior heavy stand of rotating seat by axial bearing pin, but the second rotating ring axial float, and the left end of the heavy stand inwall of rotating seat also is arranged with and can stops the second rotating ring axially to break away from the jump ring of rotating seat.
Its beneficial effect is: but the second rotating ring axial float, and also be provided with the jump ring that can stop its axial disengaging rotating seat, can form bidirectional balanced mechanical seal.
A kind of optimal way, described axle sleeve is fixed on pump shaft by a driving ring and axial screw, between driving ring and axle sleeve wall and pump shaft, also is provided with the retaining ring with fracture.
Its beneficial effect is: the general saturation vapour pressure of low density effumability medium is higher, under liquid pumping condition, the axial force that medium directly acts on Sealing is higher, for effectively transmitting torque and the displacement of restriction axle sleeve, in the time can't arranging the board-like drive mechanism of gripper chuck, need high strength anti-back tooth screw that driving ring and axle sleeve are lock onto on pump shaft, now screw can damage the pump shaft appearance, after repeatedly changing sealing, larger to the damage of pump shaft appearance, also can scratch route sleeve sealing circle herein.After retaining ring is set, can resists larger axis and not hinder pump shaft to power, effective transmitting torque again, and cheap.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Fig. 1 is the structural profile schematic diagram of the mechanical seal device for low density effumability medium that provides of embodiment.
Fig. 2 is the part broken away view of the mechanical seal device for low density effumability medium that provides of embodiment.
Fig. 3 is the end-face structure schematic diagram of the second stationary ring in embodiment.
Embodiment
With reference to figure 1 and Fig. 2, a kind of mechanical seal device for low density effumability medium, comprise gland 100, main sealing device 200, safety sealing device 300 and axle sleeve 400.The middle part of axle sleeve 400 outer walls has bulge loop 410, and the left side of this bulge loop 410 has circular groove.The coaxial heart of gland 100 is sheathed on axle sleeve 400, and gland 100 inwalls have middle extension part 110 and right-hand member extension part 120, extension part 110 left sides in the middle of bulge loop 410 is positioned at.The coaxial heart of safety sealing device 300 is sheathed on bulge loop 410 left sides of axle sleeve 400, comprise the first static components and the first rotating ring 310, the first static components comprises bellows component and the first stationary ring 320, and bellows component comprises welded metal bellow 330, seal welding is in transition ring 340 and the embedded ring 350 at welded metal bellow 330 two ends, and be welded in the basic ring 360 on transition ring 340, the first stationary ring 320 is embedded on the embedded ring 350 of bellows component right-hand member, the basic ring 360 of the first static components left end is fixed in the left end of gland 100, be provided with an O type circle 510 of auxiliary seal between basic ring 360 and gland 100.And the first rotating ring 310 is loaded in the circular groove of described bulge loop 410, and be provided with the 2nd O shape circle 520 of auxiliary seal between the first rotating ring 310 and axle sleeve 400; Main sealing device 200 comprises the second static components and the second rotating ring 210, the second static components comprises the second stationary ring 220 and throw-out collar 230, realize transmission by concavo-convex snap-in structure between throw-out collar 230 and the second stationary ring 220, middle extension part 110 right sides of gland 100 are around being evenly distributed in some spring eyes, and be connected to throw-out collar 230 left ends of the second static components by being located at spring 240 in spring eye, the throw-out collar 230 of the second static components and described in the middle of also be provided with stop pin 250 between extension part 110.But also be provided with the 3rd O shape circle 530 of the axial float of auxiliary seal between the middle extension part 110 of the second stationary ring 220 and gland 100, and sealing fluid one side of the 3rd O shape circle 530 also is provided with and prevents the 3rd O shape circle 530 liners of being extruded by high pressure 531.And the second rotating ring 210 is fixed on axle sleeve 400.The right-hand member extension part 120 of gland 100 is stepped to be extended to the right, and the inwall of this stair-stepping right-hand member extension part 120 respectively and form annular clearance space between the second stationary ring 220 outer walls and the second rotating ring 210 outer walls.The left end of axle sleeve 400 has the restraining groove of an annular, is arranged with some prepackage plates 420 in this restraining groove, and prepackage plate 420 1 ends are fixed in gland 100 left ends; There is security seal on gland 100 and rinse entrance 130, security seal rinses outlet 140 and primary seal rinse mouth 150, security seal rinses outlet 140 and is positioned at safety sealing device 300 positions, security seal rinses bulge loop 410 right positions that entrance 130 is positioned at axle sleeve 400, and primary seal rinse mouth 150 is positioned at the second static components leftward position.Safety sealing device 300 has the bellows component that state type is installed, and the stretch compensation part of main sealing device 200 is some little springs that state type is installed, and therefore, sealing surface face pressure, liquid film are stablized, and can be adapted to high-speed working condition; Main sealing device 200 is less with the revolving part of safety sealing device 300, can reduce heat of stirring, thereby reduces the possibility of seal face flash distillation.The right-hand member extension part 110 of gland 100 respectively and the annular clearance space formed between the second stationary ring 220 outer walls and the second rotating ring 210 outer walls, when washing solution is flowed through this clearance space, not only can stop the medium that low density is easily vaporized to spread and cause the sealing surface flash distillation rapidly to pump intake, and can 360 ° of uniform ring rinse around the second stationary ring 220 and the second rotating ring 210, optimized the greasy property of seal face.There is an independent closed chamber between main sealing device 200 and safety sealing device 300, can judge whether main sealing device and safety sealing device exist leakage by the force value detected in the sealing formula.Prepackage plate 420 makes the sealing device form an integrated sealing structure, is conducive to improve precision and simplifies dismounting.
Preferably, be fixed with flow guide sleeve 160 on middle extension part 110 inwalls of described gland 100, the left end of this flow guide sleeve 160 has the convex edge of extension, this convex edge is fixed in the left end of described middle extension part 110 hermetically, in the middle of making, the outer wall of the inwall of extension part 110 and flow guide sleeve 160 forms clearance space, described security seal rinses the left position that entrance 130 is positioned at this clearance space, and there is clearance space between flow guide sleeve 160 inwalls and axle sleeve 400, and the outer wall of the axle sleeve 400 of corresponding flow guide sleeve 160 positions has the first pump efficiency ring 430, and bulge loop 410 outer walls of axle sleeve 400 have the second pump efficiency ring 440.The washing solution that security seal rinses entrance 130 enters from the left end of flow guide sleeve 160 outer walls, flow through after twice pressurization of main sealing device 200 inside by the first pump efficiency ring 430 on axle sleeve 400 and the second pump efficiency ring 440 and import safety sealing device 300 outsides, and rinsing outlet 140 from security seal, to send the sealing flow container back to cooling, this loop structure can carry out cooling to main sealing device 200 and safety sealing device 300 simultaneously, and greatly improved the cycle efficiency of washing solution, abundant coolant seal end face, prevent the liquid film flash distillation of seal face, improve the reliability of sealing.
With reference to figure 3, preferably, the end face outer radius of described the second stationary ring 220 has the first arc groove 221 be uniformly distributed along the circumference, and the end face inner radius has second arc groove 222 corresponding with the first arc groove 221, and each first arc groove 221 intervals of the second stationary ring 220 end faces are evenly equipped with the rectangular deep gouge 223 that two ends are circular arc, this deep gouge 223 is near internal diameter one side.When pumping low density effumability medium (particularly lighter hydrocarbons), the sealing fluid of the medium of seal ring outside and seal ring inside is liquid state, and the pressure of medium one side is higher, and sealing fluid one side is normal pressure or with no pressure in theory, therefore, the external diameter of the end face of seal ring exists from the pressure decline of the with no pressure of being pressed onto is arranged to internal diameter, and seal ring exists from the pure liquid film in outer radial, along with successively decreasing of pressure, frictional heat due to the sealing surface generation, can cause the liquid film temperature to raise, vaporization phenomenon appears when higher than critical temperature, in the situation that there is pressure reduction in the seal ring internal-and external diameter, vaporization zone can continue to spread to the seal ring inner radius, cause occurring vapour-liquid binary states zone.And the purer liquid state of vapour-liquid binary states or the pure steam state of sealing surface are the most unstable.Therefore, after the end face external diameter of the second stationary ring 220 arranges the first arc groove 221, when the second rotating ring 210 rotation, liquid medium produces the fluid wedge dynamic pressure, medium is squeezed into seal face, generation has the pure liquid film of certain rigidity, brings subsequently the cooled region of a similar comet tail, and the seal face Liquid region is cooled; In the zone that approaches the seal face internal diameter, pressure medium successively decreases and is almost normal pressure, naturally there will be the vapour phase zone, and now the second arc groove 222 of the second stationary ring 220 is brought sealing fluid near the seal face internal diameter into, forms stable liquid film zone; And deep gouge 223 zones were vapour-liquid binary states district originally, lubricating status is poor, and under inner fluid effect and centrifugal action, partially liq is converged in deep gouge 223, can reduce the temperature in this vapour-liquid binary states district, improves lubricating status.The end-face structure of the second stationary ring 220 has been optimized seal face.
Preferably, described the second rotating ring 210 is fixed on axle sleeve 400 by a rotating seat 240, be provided with the 4th O shape circle 540 of auxiliary seal between rotating seat 240 and axle sleeve 400, and rotating seat 240 left sides have interior heavy stand, the second rotating ring 210 is loaded in the interior heavy stand of rotating seat 240 by axial bearing pin 241, but the second rotating ring 210 axial floats, and the left end of the heavy stand inwall of rotating seat 240 also is arranged with and can stops the second rotating ring 210 axially to break away from the jump ring 242 of rotating seat 240, and the 5th O shape that is provided with auxiliary seal between the second rotating ring 210 and rotating seat 240 encloses 550.But the second rotating ring 210 axial floats, and also be provided with the jump ring 242 that can stop its axial disengaging rotating seat 240, can form bidirectional balanced mechanical seal.
Preferably, described axle sleeve 400 is fixed on pump shaft by a driving ring 450 and axial screw 441, also be provided with the retaining ring 460 with fracture between driving ring 450 and axle sleeve 400 walls and pump shaft, also be provided with the 6th O shape circle 560 of auxiliary seal between axle sleeve 400 and pump shaft.The general saturation vapour pressure of low density effumability medium is higher, under liquid pumping condition, the axial force that medium directly acts on Sealing is higher, for effectively transmitting torque and 400 displacements of restriction axle sleeve, in the time can't arranging the board-like drive mechanism of gripper chuck, need high strength anti-back tooth screw that driving ring 450 and axle sleeve 400 are lock onto on pump shaft, now screw can damage the pump shaft appearance, after repeatedly changing sealing, larger to the damage of pump shaft appearance, also can scratch route sleeve sealing circle herein.After retaining ring 460 is set, can resists larger axis and not hinder pump shaft to power, effective transmitting torque again, and cheap.
Preferably, described gland 100 is divided into outer press cover 170 and internal gland 180, internal gland 180 is folded between outer press cover 170 and the pump housing, in the middle of described, extension part 110 is positioned at the right-hand member of outer press cover 170, and described right-hand member extension part 120 is positioned at the left end of internal gland 180, this split-type structural of gland 100 is conducive to moulding and the assembling of gland 100.Be provided with the 7th O shape circle 570 of auxiliary seal between outer press cover 170 and internal gland 180, and be provided with the 8th O shape circle 580 of auxiliary seal between internal gland 180 and the pump housing.
Certainly, above embodiment just is explanation rather than restriction the utility model, the above is only preferred embodiment of the present utility model, and the equivalence of doing according to the described scheme of the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (5)
1. the mechanical seal device for low density effumability medium is characterized in that: comprise gland, main sealing device, safety sealing device and axle sleeve,
The middle part of axle sleeve outer wall has bulge loop, and the left side of this bulge loop has circular groove,
The coaxial heart of gland is sheathed on axle sleeve, and the gland inwall has middle extension part and right-hand member extension part, extension part left side in the middle of bulge loop is positioned at,
The coaxial heart of safety sealing device is sheathed on the bulge loop left side of axle sleeve, comprise the first static components and the first rotating ring, the first static components comprises bellows component and the first stationary ring, the first stationary ring is embedded in the right-hand member of bellows component, the left end of the first static components is fixed in the left end of gland, and the first rotating ring is loaded in the circular groove of described bulge loop
Main sealing device comprises the second static components and the second rotating ring, the second static components comprises the second stationary ring, the middle extension part right side of gland is around being evenly distributed in some spring eyes, and be connected to the second static components by the spring of being located in spring eye, also be provided with stop pin between the second static components and described middle extension part, and the second rotating ring is fixed on axle sleeve
The right-hand member extension part of gland is stepped to be extended to the right, and the inwall of this stair-stepping right-hand member extension part forms clearance space respectively and between the second stationary ring outer wall and the second rotating ring outer wall,
The left end of axle sleeve has the restraining groove of an annular, is arranged with some prepackage plates in this restraining groove, and prepackage plate one end is fixed in the gland left end,
There is security seal on gland and rinse entrance, security seal rinses outlet and primary seal rinse mouth, security seal rinses outlet and is positioned at the safety sealing device position, and security seal rinses the bulge loop right positions that entrance is positioned at axle sleeve, and the primary seal rinse mouth is positioned at the second static components leftward position.
2. a kind of mechanical seal device for low density effumability medium according to claim 1, it is characterized in that: on the middle extension part inwall of described gland, be fixed with flow guide sleeve, the left end of this flow guide sleeve has the convex edge of extension, this convex edge is fixed in the left end of described middle extension part hermetically, in the middle of making, the outer wall of the inwall of extension part and flow guide sleeve forms clearance space, described security seal rinses the left position that entrance is positioned at this clearance space, and there is clearance space between flow guide sleeve inwall and axle sleeve, and the outer wall of the axle sleeve of corresponding flow guide sleeve position has the first pump efficiency ring, and the bulge loop outer wall of axle sleeve has the second pump efficiency ring.
3. a kind of mechanical seal device for low density effumability medium according to claim 1, it is characterized in that: the end face outer radius of described the second stationary ring has the first arc groove be uniformly distributed along the circumference, and the end face inner radius has second arc groove corresponding with the first arc groove, and each first arc groove interval of the second stationary ring end face is evenly equipped with the rectangular deep gouge that two ends are circular arc, and this deep gouge is near internal diameter one side.
4. a kind of mechanical seal device for low density effumability medium according to claim 1, it is characterized in that: described the second rotating ring is fixed on axle sleeve by a rotating seat, the rotating seat left side has interior heavy stand, the second rotating ring is loaded in the interior heavy stand of rotating seat by axial bearing pin, but the second rotating ring axial float, and the left end of the heavy stand inwall of rotating seat also is arranged with and can stops the second rotating ring axially to break away from the jump ring of rotating seat.
5. a kind of mechanical seal device for low density effumability medium according to claim 1, it is characterized in that: described axle sleeve is fixed on pump shaft by a driving ring and axial screw, between driving ring and axle sleeve wall and pump shaft, also is provided with the retaining ring with fracture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660250 CN202955019U (en) | 2012-12-05 | 2012-12-05 | Mechanical sealing device for low-density volatile medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660250 CN202955019U (en) | 2012-12-05 | 2012-12-05 | Mechanical sealing device for low-density volatile medium |
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| Publication Number | Publication Date |
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| CN202955019U true CN202955019U (en) | 2013-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220660250 Expired - Lifetime CN202955019U (en) | 2012-12-05 | 2012-12-05 | Mechanical sealing device for low-density volatile medium |
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| CN103759090A (en) * | 2014-01-06 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Asphalt conveying device with preheating function |
| CN103759008A (en) * | 2014-01-06 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Preassembled ejection preventive two-stage mechanical sealing device and ejection preventive method for same |
| CN103759007A (en) * | 2013-12-26 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Double-end-face bellows sealing device for ball mill |
| CN105465036A (en) * | 2015-12-23 | 2016-04-06 | 江苏华青流体科技有限公司 | Mechanical sealing device for high-pressure oil pipeline pump |
| CN105757254A (en) * | 2016-05-09 | 2016-07-13 | 成都通密封股份有限公司 | Floating type static spring seat and mechanical sealing structure thereof |
| CN107355542A (en) * | 2017-08-29 | 2017-11-17 | 西安普力流体科技有限公司 | A kind of mechanically-sealing apparatus for high speed sand mill |
| CN107401524A (en) * | 2017-09-08 | 2017-11-28 | 丹东克隆集团有限责任公司 | The low temperature resistant serial mechanical seal device of pump |
| CN110608288A (en) * | 2019-09-24 | 2019-12-24 | 浙江工业大学 | Sealing cavity |
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2012
- 2012-12-05 CN CN 201220660250 patent/CN202955019U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103759007A (en) * | 2013-12-26 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Double-end-face bellows sealing device for ball mill |
| CN103759007B (en) * | 2013-12-26 | 2017-06-23 | 东莞市华汇精密机械有限公司 | A kind of Double End bellow seal for ball mill |
| CN103759090A (en) * | 2014-01-06 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Asphalt conveying device with preheating function |
| CN103759008A (en) * | 2014-01-06 | 2014-04-30 | 东莞市华汇精密机械有限公司 | Preassembled ejection preventive two-stage mechanical sealing device and ejection preventive method for same |
| CN103759008B (en) * | 2014-01-06 | 2016-02-17 | 东莞市华汇精密机械有限公司 | A kind ofly pre-install the secondary mechanical seal arrangement of anti-injection and anti-injection method thereof |
| CN103759090B (en) * | 2014-01-06 | 2016-08-17 | 东莞市华汇精密机械有限公司 | A kind of asphalt conveyer of band preheating function |
| CN105465036A (en) * | 2015-12-23 | 2016-04-06 | 江苏华青流体科技有限公司 | Mechanical sealing device for high-pressure oil pipeline pump |
| CN105757254A (en) * | 2016-05-09 | 2016-07-13 | 成都通密封股份有限公司 | Floating type static spring seat and mechanical sealing structure thereof |
| CN107355542A (en) * | 2017-08-29 | 2017-11-17 | 西安普力流体科技有限公司 | A kind of mechanically-sealing apparatus for high speed sand mill |
| CN107401524A (en) * | 2017-09-08 | 2017-11-28 | 丹东克隆集团有限责任公司 | The low temperature resistant serial mechanical seal device of pump |
| CN107401524B (en) * | 2017-09-08 | 2023-07-14 | 丹东克隆集团有限责任公司 | Low-temperature-resistant serial mechanical sealing device for pump |
| CN110608288A (en) * | 2019-09-24 | 2019-12-24 | 浙江工业大学 | Sealing cavity |
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