CN212177864U - Short gas film non-contact double-end-face mechanical seal for pump - Google Patents
Short gas film non-contact double-end-face mechanical seal for pump Download PDFInfo
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- CN212177864U CN212177864U CN202020534514.6U CN202020534514U CN212177864U CN 212177864 U CN212177864 U CN 212177864U CN 202020534514 U CN202020534514 U CN 202020534514U CN 212177864 U CN212177864 U CN 212177864U
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Abstract
The utility model provides a short gas film non-contact double-end-face mechanical seal for a pump, which comprises a movable ring seat and a movable ring sleeved on the movable ring seat; the two friction surfaces of the dynamic ring are respectively provided with a first static ring and a second static ring; the outer side end of the first static ring is sleeved with an atmosphere end static ring seat, and the outer side end of the second static ring is sleeved with a medium end static ring seat; a cavity is clamped between the atmosphere end static ring seat and the medium end static ring seat, an air cavity is formed between the inner diameter wall of the cavity and the outer diameter walls of the movable ring, the first static ring and the second static ring, an air inlet is formed in the outer wall of the cavity, and the air inlet is communicated with the air cavity; arc grooves are formed in the two friction surfaces of the movable ring, and the outer side ends of the arc grooves are communicated with the air cavity. The mechanical seal realizes non-contact operation by forming micron-sized gas film lubrication through gas, and compared with a contact type seal, the mechanical seal has the characteristics of low leakage rate, no abrasion operation, low energy consumption, long service life and no pollution to a sealed medium.
Description
Technical Field
The utility model relates to a mechanical seal field especially involves a pump is with short type gas film non-contact double mechanical seal.
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, generally adopt contact mechanical seal in the mechanical seal for pump, this has led to the rotating ring comparatively serious with quiet wearing and tearing of ring, and then has increased the use cost in later stage.
The present invention is an improvement to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pump is with short type gas film non-contact two terminal surface mechanical seal to solve above-mentioned defect.
The utility model discloses a solve the technical scheme that its technical problem adopted and be:
a short gas film non-contact double-end-face mechanical seal for a pump comprises a movable ring seat and a movable ring sleeved on the movable ring seat.
The two friction surfaces of the dynamic ring are respectively provided with a first static ring and a second static ring; the outer side end of the first static ring is sleeved with an atmosphere end static ring seat, and the outer side end of the second static ring is sleeved with a medium end static ring seat; a cavity is clamped between the atmosphere end static ring seat and the medium end static ring seat, an air cavity is formed between the inner diameter wall of the cavity and the outer diameter walls of the movable ring, the first static ring and the second static ring, an air inlet is formed in the outer wall of the cavity, and the air inlet is communicated with the air cavity; arc grooves are formed in the two friction surfaces of the movable ring, and the outer side ends of the arc grooves are communicated with the air cavity.
Furthermore, a movable ring pressing ring is abutted to the end face of one side of the movable ring, and the movable ring pressing ring is sleeved outside the movable ring seat and is fixed through a bolt; the second stationary ring is located on the outer side of the movable ring pressing ring, a gap is formed between the second stationary ring and the movable ring pressing ring, and a gap is also formed between the first stationary ring and the movable ring seat.
Furthermore, the inner diameter wall of the movable ring seat is embedded with a fastening ring, the movable ring seat is provided with at least one pin hole, and the pin hole is matched with the outer wall of the fastening ring.
Furthermore, a plurality of blind holes are formed in the inner side end faces of the atmosphere end static ring seat and the medium end static ring seat, springs are arranged in the blind holes, and the exposed ends of the springs are respectively abutted against the outer side end faces of the first static ring and the second static ring.
Furthermore, a plurality of first pin holes are formed in the atmosphere end static ring seat and the medium end static ring seat, a plurality of second pin holes are formed in the first static ring and the second static ring, the first pin holes correspond to the second pin holes and are provided with pins, and the diameters of the second pin holes are larger than the diameters of the pins.
Furthermore, a plurality of corresponding threaded holes are formed in the movable ring, the first stationary ring and the second stationary ring, and the threaded holes are matched with the bolts.
Further, the inner side end faces of the atmosphere end static ring seat and the medium end static ring seat are provided with first step faces; the outer side end faces of the first stationary ring and the second stationary ring are provided with a second step face and a third step face, one side of the spring is positioned in the blind hole, and the other side of the spring is abutted against the third step face; a first sealing groove is formed between the first step surface and the second step surface, and a first O-shaped ring is arranged in the first sealing groove.
Furthermore, a second O-shaped ring is embedded in the inner diameter wall of the movable ring seat, and second O-shaped rings are also embedded in the contact surfaces of the cavity and the atmosphere end static ring seat and the medium end static ring seat; a second O-shaped ring is also embedded on the contact surface of the movable ring seat and the movable ring; and a second O-shaped ring is also embedded on the end surface of the outer side of the medium end static ring seat.
Furthermore, a fourth step surface is formed on the end surface of the inner side of the atmosphere end static ring seat and the medium end static ring seat, circular protruding strips protruding outwards are arranged on the end surfaces of the two sides of the cavity, and the circular protruding strips are matched with the fourth step surface.
The utility model has the advantages that:
the utility model provides a pump is with short type gas film non-contact double mechanical seal forms micron order gas film lubrication through gaseous, realizes contactless operation, and this mechanical seal compares with contact seal, has low leakage rate, the operation of wearing and tearing does not have, low energy consumption, longe-lived, does not pollute by sealed medium's characteristics; the machine is used in pump equipment for sealing liquid such as water, oil, weak acid-base solvent and the like and industrial gas, and nitrogen is used as isolation gas, so that the environment and soil are not polluted after leakage, and environment-friendly operation is realized; the mechanical seal is short in axial installation size, and the size of the pump can be shortened correspondingly, so that the cost is reduced.
Drawings
Fig. 1 is a cross-sectional view of a short gas film non-contact double-end mechanical seal for a pump according to the present invention;
fig. 2 is an end elevation view of the rotating ring 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 fig. 2, the short gas film non-contact double-end mechanical seal for a pump according to the present invention includes a moving ring seat 1 and a moving ring 2 sleeved on the moving ring seat 1; the two friction surfaces of the dynamic ring 2 are respectively provided with a first static ring 3 and a second static ring 4; an atmosphere end static ring seat 5 is sleeved at the outer side end of the first static ring 3, and a medium end static ring seat 6 is sleeved at the outer side end of the second static ring 4; a cavity 7 is clamped between the atmosphere end static ring seat 5 and the medium end static ring seat 6, an air cavity is formed between the inner diameter wall of the cavity 7 and the outer diameter walls of the movable ring 2, the first static ring 3 and the second static ring 4, an air inlet 71 is formed in the outer wall of the cavity 7, and the air inlet 71 is communicated with the air cavity; arc grooves 21 are formed in the two friction surfaces of the movable ring 2, and the outer side ends of the arc grooves 21 are communicated with the air cavity.
By adopting the technical scheme, the sealing effect is better through the matching use of the movable ring and the two static rings; nitrogen is filled in the arc groove through the air inlet, so that the abrasion of the movable ring and the static ring is lower.
The utility model discloses a further set up to: a moving ring pressing ring 8 is abutted to one side end face of the moving ring 2, and the moving ring pressing ring 8 is sleeved outside the moving ring seat 1 and fixed through a bolt; the second stationary ring 4 is located on the outer side of the moving ring pressing ring 8, a gap is formed between the second stationary ring 4 and the moving ring pressing ring 8, and a gap is also formed between the first stationary ring 3 and the moving ring seat 1. Through adopting above-mentioned technical scheme, through the setting of rotating ring clamping ring for the position of rotating ring is difficult not hard up.
The utility model discloses a further set up to: the inner diameter wall of the movable ring seat 1 is embedded with a fastening ring 9, at least one pin hole is formed in the movable ring seat 1, and the pin hole is matched with the outer wall of the fastening ring 9. Through adopting above-mentioned technical scheme, use through the cooperation of pin hole and outside pin for the rotating ring seat can be fastened on the axle that is sealed.
The utility model discloses a further set up to: the inner side end faces of the atmosphere end static ring seat 5 and the medium end static ring seat 6 are provided with a plurality of blind holes, springs 10 are arranged in the blind holes, and the exposed ends of the springs 10 are respectively abutted against the outer side end faces of the first static ring 3 and the second static ring 4. Through adopting above-mentioned technical scheme, through the setting of spring for this mechanical seal also can seal under the condition that does not have gas admission.
The utility model discloses a further set up to: a plurality of first pin holes are formed in the large air end static ring seat 5 and the medium end static ring seat 6, a plurality of second pin holes are formed in the first static ring 3 and the second static ring 4, the first pin holes correspond to the second pin holes and are provided with pins 11, and the diameters of the second pin holes are larger than the diameters of the pins. By adopting the technical scheme, the first stationary ring and the second stationary ring are fixed at the positions thereof through the pins, so that the first stationary ring and the second stationary ring cannot rotate; the diameter of the second pin hole is larger than that of the pin, so that the first stationary ring and the second stationary ring can float up and down.
The utility model discloses a further set up to: a plurality of corresponding threaded holes are formed in the moving ring 2, the first stationary ring 3 and the second stationary ring 4 and are matched with bolts. Through adopting above-mentioned technical scheme, this mechanical seal passes through the screw hole and connects in the medium end soon through the bolt.
The utility model discloses a further set up to: the inner side end faces of the atmosphere end static ring seat 5 and the medium end static ring seat 6 are provided with first step faces; a second step surface and a third step surface are arranged on the outer side end surfaces of the first stationary ring 3 and the second stationary ring, one side of the spring 10 is positioned in the blind hole, and the other side of the spring abuts against the third step surface; a first sealing groove is formed between the first step surface and the second step surface, and a first O-shaped ring 12 is arranged in the first sealing groove. Through adopting above-mentioned technical scheme, seal first quiet ring and atmosphere end quiet ring holder through first O type circle, seal second quiet ring and medium end quiet ring holder through first O type circle.
The utility model discloses a further set up to: a second O-shaped ring 13 is embedded in the inner diameter wall of the movable ring seat 1, and the second O-shaped ring 13 is also embedded in the contact surfaces of the cavity 7 and the atmosphere end static ring seat 5 and the medium end static ring seat 6; a second O-shaped ring 13 is also embedded on the contact surface of the movable ring seat 1 and the movable ring 2; and a second O-shaped ring 13 is also embedded on the end surface of the outer side of the medium end static ring seat 6. Through adopting above-mentioned technical scheme, form sealedly to everywhere contact surface through second O type circle.
The utility model discloses a further set up to: and a fourth step surface is formed on the end surface of the inner side of the atmosphere end static ring seat 5 and the medium end static ring seat 6, circular convex strips 72 protruding outwards are arranged on the end surfaces of two sides of the cavity 7, and the circular convex strips 72 are matched with the fourth step surface. Through adopting above-mentioned technical scheme, through the setting of circular sand grip and fourth step face for be convenient for install between first quiet ring, the quiet ring of second and the cavity.
And a transmission bolt is fixed on the outer side of the movable ring seat, and the outer side end of the transmission bolt is embedded in the inner diameter wall of the movable ring so as to drive the movable ring to rotate.
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.
The utility model discloses a theory of operation:
install this mechanical seal through bolt and pin earlier, then drive rotating ring seat and rotating ring through the axle and rotate, air inlet access nitrogen gas for be filled with nitrogen gas in air cavity and the arc groove, when being full of nitrogen gas in the arc groove, the spring compresses, makes and forms contactless operation between first quiet ring, the quiet ring of second and the rotating ring.
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 (9)
1. The utility model provides a pump is with short type gas film non-contact double mechanical seal, includes rotating ring seat (1) and rotating ring (2) that the cover was located on rotating ring seat (1), its characterized in that:
the two friction surfaces of the dynamic ring (2) are respectively provided with a first static ring (3) and a second static ring (4); an atmosphere end static ring seat (5) is sleeved at the outer side end of the first static ring (3), and a medium end static ring seat (6) is sleeved at the outer side end of the second static ring (4); a cavity (7) is clamped between the atmosphere end static ring seat (5) and the medium end static ring seat (6), an air cavity is formed between the inner diameter wall of the cavity (7) and the outer diameter walls of the movable ring (2), the first static ring (3) and the second static ring (4), an air inlet (71) is formed in the outer wall of the cavity (7), and the air inlet (71) is communicated with the air cavity; arc grooves (21) are formed in the two friction surfaces of the movable ring (2), and the outer side ends of the arc grooves (21) are communicated with the air cavity.
2. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: a moving ring pressing ring (8) is abutted to the end face of one side of the moving ring (2), and the moving ring pressing ring (8) is sleeved outside the moving ring seat (1) and fixed through a bolt; the second stationary ring (4) is located on the outer side of the movable ring pressing ring (8), a gap is formed between the second stationary ring (4) and the movable ring pressing ring (8), and a gap is also formed between the first stationary ring (3) and the movable ring seat (1).
3. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: the inner diameter wall of the movable ring seat (1) is embedded with a fastening ring (9), at least one pin hole is formed in the movable ring seat (1), and the pin hole is matched with the outer wall of the fastening ring (9).
4. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: the inner side end faces of the atmosphere end static ring seat (5) and the medium end static ring seat (6) are provided with a plurality of blind holes, springs (10) are arranged in the blind holes, and the exposed ends of the springs (10) are respectively abutted against the outer end faces of the first static ring (3) and the second static ring (4).
5. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: a plurality of first pin holes are formed in the large air end static ring seat (5) and the medium end static ring seat (6), a plurality of second pin holes are formed in the first static ring (3) and the second static ring (4), the first pin holes correspond to the second pin holes and are provided with pins (11), and the diameter of each second pin hole is larger than that of each pin.
6. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: a plurality of corresponding threaded holes are formed in the movable ring (2), the first stationary ring (3) and the second stationary ring (4), and the threaded holes are matched with bolts.
7. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 4, characterized in that: the inner side end faces of the atmosphere end static ring seat (5) and the medium end static ring seat (6) are provided with first step faces; a second step surface and a third step surface are arranged on the outer side end surfaces of the first stationary ring (3) and the second stationary ring, one side of the spring (10) is positioned in the blind hole, and the other side of the spring is abutted against the third step surface; a first sealing groove is formed between the first step surface and the second step surface, and a first O-shaped ring (12) is arranged in the first sealing groove.
8. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: a second O-shaped ring (13) is embedded in the inner diameter wall of the movable ring seat (1), and the second O-shaped ring (13) is also embedded in the contact surfaces of the cavity (7) and the atmosphere end static ring seat (5) and the medium end static ring seat (6); a second O-shaped ring (13) is also embedded on the contact surface of the movable ring seat (1) and the movable ring (2); and a second O-shaped ring (13) is also embedded on the end surface of the outer side of the medium end static ring seat (6).
9. The short-type gas film non-contact double-end-face mechanical seal for the pump according to claim 1, characterized in that: the air end static ring seat (5) and the medium end static ring seat (6) are provided with a fourth step surface on the inner side end surface, the two side end surfaces of the cavity (7) are provided with circular convex strips (72) protruding outwards, and the circular convex strips (72) are matched with the fourth step surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020534514.6U CN212177864U (en) | 2020-04-13 | 2020-04-13 | Short gas film non-contact double-end-face mechanical seal for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020534514.6U CN212177864U (en) | 2020-04-13 | 2020-04-13 | Short gas film non-contact double-end-face mechanical seal for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212177864U true CN212177864U (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020534514.6U Active CN212177864U (en) | 2020-04-13 | 2020-04-13 | Short gas film non-contact double-end-face mechanical seal for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212177864U (en) |
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2020
- 2020-04-13 CN CN202020534514.6U patent/CN212177864U/en active Active
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