CN212080157U - Gas film non-contact double-end-face mechanical seal for fan - Google Patents

Gas film non-contact double-end-face mechanical seal for fan Download PDF

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Publication number
CN212080157U
CN212080157U CN202020533710.1U CN202020533710U CN212080157U CN 212080157 U CN212080157 U CN 212080157U CN 202020533710 U CN202020533710 U CN 202020533710U CN 212080157 U CN212080157 U CN 212080157U
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China
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ring
face
atmosphere
medium
embedded
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CN202020533710.1U
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Chinese (zh)
Inventor
应志伟
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Zhejiang Zhongji Mechanical Seal Co ltd
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Zhejiang Zhongji Mechanical Seal Co ltd
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Abstract

A gas film non-contact double-end-face mechanical seal for a fan comprises a shaft sleeve; the outer wall of the shaft sleeve is provided with a spring seat through a transmission screw, the shaft sleeve is sleeved with a medium end moving ring and an atmosphere end moving ring, the medium end moving ring and the atmosphere end moving ring are respectively positioned on the left side and the right side of the spring seat, and the left extending end and the right extending end of the spring seat respectively extend to the outer walls of the medium end moving ring and the atmosphere end moving ring and are movably connected; the left side of the shaft sleeve is provided with a labyrinth seal, the right side of the labyrinth seal is clamped with a cavity, the right side of the cavity is embedded with a medium end static ring, and the right side surface of the medium end static ring is abutted with the outer side surface of the medium end moving ring; the shaft sleeve is also sleeved with a cover plate, an atmosphere end static ring is embedded in the end face of the left side face of the cover plate, and the left side end face of the atmosphere end static ring is abutted to the outer side end face of the atmosphere end dynamic ring; the outer end faces of the medium end rotating ring and the atmosphere end rotating ring are provided with a plurality of arc-shaped grooves, and the outer ends of the arc-shaped grooves are communicated with the outside.

Description

Gas film non-contact double-end-face mechanical seal for fan
Technical Field
The utility model relates to a mechanical seal field especially involves a gas film non-contact double mechanical seal for fan.
Background
The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world. The mechanical seal, also called end face seal, is a device for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal. At present, the mechanical seal used by the fan in a severe environment generally adopts a contact type mechanical seal, which causes the abrasion and corrosion of a movable ring and a static ring to be serious, and the service life of the mechanical seal is reduced.
The present invention is an improvement to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an air film non-contact two terminal surface mechanical seal for fan to solve above-mentioned defect.
The utility model discloses a solve the technical scheme that its technical problem adopted and be:
a gas film non-contact double-end-face mechanical seal for a fan comprises a shaft sleeve.
A spring seat is fixed on the outer wall of the shaft sleeve through a transmission screw, a medium end moving ring and an atmosphere end moving ring are sleeved on the shaft sleeve, the medium end moving ring and the atmosphere end moving ring are respectively positioned on the left side and the right side of the spring seat, and the left extending end and the right extending end of the spring seat respectively extend to the outer walls of the medium end moving ring and the atmosphere end moving ring and are movably connected; the left side of the shaft sleeve is provided with a labyrinth seal, the right side of the labyrinth seal is clamped with a cavity, the right side of the cavity is embedded with a medium end static ring, and the right side surface of the medium end static ring is abutted with the outer side surface of the medium end moving ring; the shaft sleeve is also sleeved with a cover plate, an atmosphere end static ring is embedded in the end face of the left side face of the cover plate, and the left side end face of the atmosphere end static ring is abutted to the outer side end face of the atmosphere end dynamic ring; the outer end faces of the medium end rotating ring and the atmosphere end rotating ring are provided with a plurality of arc-shaped grooves, and the outer ends of the arc-shaped grooves are communicated with the outside.
Furthermore, the shaft sleeve is further sleeved with two push rings, the two push rings are respectively attached to the inner side end faces of the medium end moving ring and the atmosphere end moving ring, and a plurality of springs are fixed between the two push rings.
Furthermore, the right end face of the cavity is clamped on the left end face of the cover plate, a first step face is arranged on the left side of the cover plate, a second step face is arranged on the right end face of the cavity, and the first step face and the second step face are matched; air cavities are formed among the cavity, the shaft sleeve, the medium end moving ring and the atmosphere end moving ring, and the outer side end of the arc-shaped groove is communicated with the air cavities.
Furthermore, the outer walls of the medium end moving ring and the atmosphere end moving ring are respectively provided with a strip-shaped groove, the lower sides of the left and right extending edges of the spring seat are respectively provided with a fixing block protruding downwards according to the doll, and the fixing blocks are matched with the strip-shaped grooves.
Furthermore, the labyrinth seal is fixed on the left side of the cavity through a first cylindrical head screw, and the outer side end of the first cylindrical head screw is sealed through a choke plug; the labyrinth seal and the cavity are sleeved with a shell, the shell is provided with a first nitrogen charging port and a second nitrogen charging port, the first nitrogen charging port extends into the labyrinth seal, and the second nitrogen charging port penetrates through the cavity and is communicated with the air cavity; the cover plate and the right flange edge of the cavity are fixed on the right end face of the shell through second cylindrical head screws.
Furthermore, a third step surface and a fourth step surface which are recessed leftwards are arranged on the end face of the right side of the medium end static ring, the medium end moving ring is embedded in the third step surface and the fourth step surface, at least one first positioning pin is embedded in the fourth step surface, and the right side of the first positioning pin is embedded in the end face of the left side of the medium end static ring; and a first base plate is sleeved on the medium end moving ring and is positioned between the third step surface and the medium end moving ring.
Furthermore, a fixed groove is formed in the left end face of the cover plate, the atmosphere end static ring is embedded in the fixed groove, a second base plate is arranged in the fixed groove, and the second base plate is attached to the right end face of the atmosphere end static ring; at least one second locating pin is embedded in the fixing groove, and the left side end of the second locating pin penetrates through the second base plate and is embedded in the right side end face of the atmosphere end static ring.
Furthermore, the right side end of the shaft sleeve is clamped with a fixing ring through a step structure, at least one flat-end fastening screw is embedded in the fixing ring, and the inner side end of the flat-end fastening screw is abutted to the sealed shaft.
Furthermore, the right side terminal surface of apron is fixed with the stopper of two relative settings through third cylinder head screw, the stopper is used for spacing the retainer plate.
Furthermore, an O-shaped ring is embedded on the inner diameter wall of the shaft sleeve; o-shaped rings are embedded on the contact surfaces of the medium end moving ring and the atmosphere end moving ring and the shaft sleeve; an O-shaped ring is embedded on the contact surface of the cavity and the medium end static ring, and an O-shaped ring is embedded on the contact surface of the cover plate and the atmosphere end static ring; an O-shaped ring is embedded on the outer side surface of the labyrinth seal and the cavity, and an O-shaped ring is embedded on the contact surface of the cavity and the cover plate.
The utility model has the advantages that:
the utility model provides a two terminal surface mechanical seal of gas film non-contact for fan forms micron order gas film lubrication between the sealed face of rotating ring and quiet ring through nitrogen gas to realize contactless operation, this mechanical seal compares with contact seal, has low leakage rate, the operation of wearing and tearing, low energy consumption, long-lived, do not pollute by the advantage of sealed medium, this mechanical seal uses in the medium operating mode fan equipment of industrial gas such as poisonous and harmful chlorine and oil, so adopt contactless seal, can make this mechanical seal's life obtain prolonging; the mechanical seal adopts nitrogen as isolation gas, and a small amount of leaked nitrogen cannot pollute the environment and soil, so that the mechanical seal is more environment-friendly
Drawings
Fig. 1 is a cross-sectional view of an air film non-contact double mechanical seal for a fan according to the present invention;
fig. 2 is a friction end face elevation view of the media and atmospheric end stop rings in the mechanical seal.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 2, the present invention provides a gas film non-contact double-end mechanical seal for a fan, which includes a shaft sleeve 1; a spring seat 3 is fixed on the outer wall of the shaft sleeve 1 through a transmission screw 2, a medium end moving ring 4 and an atmosphere end moving ring 5 are sleeved on the shaft sleeve 1, the medium end moving ring 4 and the atmosphere end moving ring 5 are respectively positioned on the left side and the right side of the spring seat 3, and the left extending end and the right extending end of the spring seat 3 respectively extend to the outer walls of the medium end moving ring 4 and the atmosphere end moving ring 5 and are movably connected; a labyrinth seal 6 is arranged on the left side of the shaft sleeve 1, a cavity 7 is clamped on the right side of the labyrinth seal 6, a medium end static ring 8 is embedded on the right side of the cavity 7, and the right side surface of the medium end static ring 8 is abutted with the outer side surface of the medium end dynamic ring 4; the shaft sleeve 1 is further sleeved with a cover plate 9, an atmosphere end static ring 10 is embedded in the end face of the left side face of the cover plate 9, and the left side end face of the atmosphere end static ring 10 is abutted to the outer side end face of the atmosphere end moving ring 5; the outer side end faces of the medium end moving ring 4 and the atmosphere end moving ring 5 are provided with a plurality of arc-shaped grooves 41, and the outer side ends of the arc-shaped grooves 41 are communicated with the outside; the medium end movable ring and the atmosphere end movable ring are provided with a left gap and a right gap on the shaft sleeve; the opening direction of the arc-shaped groove is opposite to the rotating direction of the shaft, so that gas can quickly enter the arc-shaped groove when the movable ring rotates.
Through adopting above-mentioned technical scheme, drive medium end rotating ring 4 and atmosphere end rotating ring 5 through the axle sleeve and rotate for medium end rotating ring and atmosphere end rotating ring respectively with the static ring of medium end and atmosphere end form sealedly between the static ring, then through having seted up the arc wall on the friction surface at medium end rotating ring and atmosphere end rotating ring, in continuously entering into the arc wall through outside gas, make to form micron order air film lubrication between rotating ring and the static ring, thereby realize contactless operation.
The utility model discloses a further set up to: the shaft sleeve 1 is further sleeved with two push rings 11, the two push rings 11 are respectively attached to the inner side end faces of the medium end moving ring 4 and the atmosphere end moving ring 5, and a plurality of springs 12 are fixed between the two push rings.
Through adopting above-mentioned technical scheme, through the setting of spring with push away the ring, when outside gas does not enter into between rotating ring and the quiet ring, can compression spring, when gas does not enter into, push away the normal position with the rotating ring through the spring.
The utility model discloses a further set up to: the right end face of the cavity 7 is clamped on the left end face of the cover plate 9, a first step face is arranged on the left side of the cover plate 9, a second step face is arranged on the right end face of the cavity 7, and the first step face and the second step face are matched; an air cavity 71 is formed between the cavity 7 and the shaft sleeve 1, between the medium end moving ring 4 and between the cavity and the atmosphere end moving ring 5, and the outer side end of the arc-shaped groove 41 is communicated with the air cavity 71.
By adopting the technical scheme, the external gas enters the arc-shaped groove through the gas cavity.
The utility model discloses a further set up to: the outer walls of the medium end moving ring 4 and the atmosphere end moving ring 5 are respectively provided with a strip-shaped groove, the lower sides of the left and right extending edges of the spring seat 3 are respectively provided with a fixing block protruding downwards according to a pair, and the fixing blocks are matched with the strip-shaped grooves.
Through adopting above-mentioned technical scheme, through the setting of fixed block and strip type groove for when the rotating ring can the horizontal slip, the axle sleeve can also drive the rotating ring and rotate.
The utility model discloses a further set up to: the labyrinth seal 6 is fixed on the left side of the cavity 7 through a first cylindrical head screw 13, and the outer side end of the first cylindrical head screw 13 is sealed through a choke plug 61; the labyrinth seal 6 and the cavity 7 are sleeved with a shell 14, the shell 14 is provided with a first nitrogen charging port 141 and a second nitrogen charging port 142, the first nitrogen charging port 141 extends into the labyrinth seal 6, and the second nitrogen charging port 142 penetrates through the cavity 7 and is communicated with the air cavity 71; the cover plate 9 and the right flange edge of the cavity 7 are fixed on the right end face of the shell 14 through a second cylindrical head screw 15.
Through adopting above-mentioned technical scheme, fill nitrogen mouth and second through first, in the first nitrogen mouth that fills gets into labyrinth seal that fills nitrogen mouth, the second fills in nitrogen mouth entering into the air cavity, uses nitrogen gas as isolation gas, and a small amount of nitrogen gas of leakage can not polluted environment and soil for this mechanical seal environmental protection more.
The utility model discloses a further set up to: the right side end face of the medium end static ring 8 is provided with a third step face and a fourth step face which are recessed leftwards, the medium end movable ring 4 is embedded in the third step face and the fourth step face, the fourth step face is internally embedded with at least one first positioning pin 23, and the right side of the first positioning pin 23 is embedded in the left side end face of the medium end static ring 8; the medium end moving ring 4 is sleeved with a first base plate 16, and the first base plate 16 is located between the third step surface and the medium end moving ring 4.
Through adopting above-mentioned technical scheme, fix the position of medium end quiet ring through first locating pin to make it can not rotate.
The utility model discloses a further set up to: a fixed groove is formed in the left end face of the cover plate 9, the atmosphere end static ring 10 is embedded in the fixed groove, a second base plate 17 is arranged in the fixed groove, and the second base plate 17 is attached to the right end face of the atmosphere end static ring 10; at least one second positioning pin 18 is embedded in the fixing groove, and the left end of the second positioning pin 18 penetrates through the second base plate 17 and is embedded in the right end face of the atmosphere-end stationary ring 10.
Through adopting above-mentioned technical scheme, fix the position of atmosphere end quiet ring through the second locating pin to make it can not rotate.
The utility model discloses a further set up to: the right side end of the shaft sleeve 1 is clamped with a fixing ring 19 through a step structure, at least one flat end set screw 20 is embedded in the fixing ring 19, and the inner side end of the flat end set screw 20 is abutted to a sealed shaft.
Through adopting above-mentioned technical scheme, be fixed in the axle sleeve by sealed epaxial through the retainer plate for the axle sleeve rotates with the axle.
The utility model discloses a further set up to: the right end face of the cover plate 9 is fixed with two oppositely arranged limiting blocks 22 through third cylindrical head screws 21, and the limiting blocks 22 are used for limiting the fixing ring 19.
Through adopting above-mentioned technical scheme, establish the setting through the stopper for the retainer plate is inseparabler with being connected of axle sleeve.
The utility model discloses a further set up to: an O-shaped ring is embedded in the inner diameter wall of the shaft sleeve 1; o-shaped rings are embedded on the contact surfaces of the medium end moving ring 4 and the atmosphere end moving ring 5 and the shaft sleeve 1; an O-shaped ring is embedded on the contact surface of the cavity 7 and the medium end static ring 8, and an O-shaped ring is embedded on the contact surface of the cover plate 9 and the atmosphere end static ring 10; an O-shaped ring is embedded on the outer side surfaces of the labyrinth seal 6 and the cavity 7, and an O-shaped ring is embedded on the contact surface of the cavity 7 and the cover plate 9.
Through adopting above-mentioned technical scheme, through the setting of O type circle for form sealed between each part.
The utility model discloses a theory of operation:
the mechanical seal is fixed on a sealed shaft, then the shaft drives the movable ring to rotate, so that sealing is formed between the movable ring and the static ring, then nitrogen is filled through the second nitrogen filling port and flushed into the nitrogen, the nitrogen enters the arc-shaped groove through the air cavity, and micron-sized air film lubrication is formed between the movable ring and the static ring, so that non-contact operation is realized.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to let the technical personnel in the field understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims (10)

1. The utility model provides a gas film non-contact double mechanical seal for fan, includes axle sleeve (1), its characterized in that:
a spring seat (3) is fixed on the outer wall of the shaft sleeve (1) through a transmission screw (2), a medium end moving ring (4) and an atmosphere end moving ring (5) are sleeved on the shaft sleeve (1), the medium end moving ring (4) and the atmosphere end moving ring (5) are respectively positioned on the left side and the right side of the spring seat (3), and the left extending end and the right extending end of the spring seat (3) respectively extend to the outer walls of the medium end moving ring (4) and the atmosphere end moving ring (5) and are movably connected; a labyrinth seal (6) is arranged on the left side of the shaft sleeve (1), a cavity (7) is clamped on the right side of the labyrinth seal (6), a medium end static ring (8) is embedded on the right side of the cavity (7), and the right side surface of the medium end static ring (8) is abutted to the outer side surface of the medium end moving ring (4); the shaft sleeve (1) is further sleeved with a cover plate (9), an atmosphere end static ring (10) is embedded in the end face of the left side face of the cover plate (9), and the left side end face of the atmosphere end static ring (10) is abutted to the end face of the outer side of the atmosphere end moving ring (5); the outer end faces of the medium end moving ring (4) and the atmosphere end moving ring (5) are provided with a plurality of arc-shaped grooves (41), and the outer ends of the arc-shaped grooves (41) are communicated with the outside.
2. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: the shaft sleeve (1) is further sleeved with two push rings (11), the two push rings (11) are respectively attached to the inner side end faces of the medium end moving ring (4) and the atmosphere end moving ring (5), and a plurality of springs (12) are fixed between the two push rings.
3. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: the right end face of the cavity (7) is clamped on the left end face of the cover plate (9), a first step face is arranged on the left side of the cover plate (9), a second step face is arranged on the right end face of the cavity (7), and the first step face is matched with the second step face; an air cavity (71) is formed between the cavity (7) and the shaft sleeve (1), between the medium end moving ring (4) and between the atmosphere end moving ring (5), and the outer side end of the arc-shaped groove (41) is communicated with the air cavity (71).
4. The gas film non-contact double mechanical seal for a fan of claim 2, wherein: the outer walls of the medium end moving ring (4) and the atmosphere end moving ring (5) are respectively provided with a strip-shaped groove, the lower sides of the left and right extending edges of the spring seat (3) are respectively provided with a fixing block protruding downwards according to an idol, and the fixing blocks are matched with the strip-shaped grooves.
5. A gas film non-contact double mechanical seal for a wind turbine as claimed in claim 3 wherein: the labyrinth seal (6) is fixed on the left side of the cavity (7) through a first cylindrical head screw (13), and the outer side end of the first cylindrical head screw (13) is sealed through a choke plug (61); the labyrinth seal (6) and the cavity (7) are sleeved with a shell (14), the shell (14) is provided with a first nitrogen charging port (141) and a second nitrogen charging port (142), the first nitrogen charging port (141) extends into the labyrinth seal (6), and the second nitrogen charging port (142) penetrates through the cavity (7) and is communicated with the air cavity (71); the cover plate (9) and the right flange edge of the cavity (7) are fixed on the right end face of the shell (14) through a second cylindrical head screw (15).
6. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: the right side end face of the medium end static ring (8) is provided with a third step face and a fourth step face which are sunken leftwards, the medium end movable ring (4) is embedded in the third step face and the fourth step face, at least one first positioning pin (23) is embedded in the fourth step face, and the right side of the first positioning pin (23) is embedded in the left side end face of the medium end static ring (8); the medium end moving ring (4) is sleeved with a first base plate (16), and the first base plate (16) is located between the third step surface and the medium end moving ring (4).
7. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: a fixed groove is formed in the left end face of the cover plate (9), the atmosphere end static ring (10) is embedded in the fixed groove, a second base plate (17) is arranged in the fixed groove, and the second base plate (17) is attached to the right end face of the atmosphere end static ring (10); at least one second positioning pin (18) is embedded in the fixing groove, and the left side end of the second positioning pin (18) penetrates through the second base plate (17) and is embedded in the right side end face of the atmosphere end static ring (10).
8. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: the right side end of axle sleeve (1) has retainer plate (19) through the stair structure joint, embedded at least one flush end holding screw (20) that is equipped with of retainer plate (19), the medial extremity of flush end holding screw (20) with by sealed axle looks butt.
9. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 8, wherein: the right end face of the cover plate (9) is fixed with two limiting blocks (22) which are oppositely arranged through third cylindrical head screws (21), and the limiting blocks (22) are used for limiting the fixing ring (19).
10. The gas film non-contact double mechanical seal for a wind turbine as claimed in claim 1, wherein: an O-shaped ring is embedded on the inner diameter wall of the shaft sleeve (1); o-shaped rings are embedded on the contact surfaces of the medium end moving ring (4) and the atmosphere end moving ring (5) and the shaft sleeve (1); an O-shaped ring is embedded on the contact surface of the cavity (7) and the medium end static ring (8), and an O-shaped ring is embedded on the contact surface of the cover plate (9) and the atmosphere end static ring (10); an O-shaped ring is embedded on the outer side surfaces of the labyrinth seal (6) and the cavity (7), and an O-shaped ring is embedded on the contact surface of the cavity (7) and the cover plate (9).
CN202020533710.1U 2020-04-13 2020-04-13 Gas film non-contact double-end-face mechanical seal for fan Active CN212080157U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020533710.1U CN212080157U (en) 2020-04-13 2020-04-13 Gas film non-contact double-end-face mechanical seal for fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020533710.1U CN212080157U (en) 2020-04-13 2020-04-13 Gas film non-contact double-end-face mechanical seal for fan

Publications (1)

Publication Number Publication Date
CN212080157U true CN212080157U (en) 2020-12-04

Family

ID=73594318

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020533710.1U Active CN212080157U (en) 2020-04-13 2020-04-13 Gas film non-contact double-end-face mechanical seal for fan

Country Status (1)

Country Link
CN (1) CN212080157U (en)

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