CN210265249U - Self-purification mechanical seal for centrifugal pump - Google Patents
Self-purification mechanical seal for centrifugal pump Download PDFInfo
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- CN210265249U CN210265249U CN201921171956.2U CN201921171956U CN210265249U CN 210265249 U CN210265249 U CN 210265249U CN 201921171956 U CN201921171956 U CN 201921171956U CN 210265249 U CN210265249 U CN 210265249U
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- mechanical seal
- ring seat
- movable ring
- pump
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Abstract
The utility model discloses a self-cleaning mechanical seal for a centrifugal pump, which comprises a pump cover fixed with the pump shell of the centrifugal pump, a mechanical seal shaft sleeve fixedly sleeved with the pump shaft of the centrifugal pump, a movable ring seat, a static ring seat, a movable ring and a static ring; the movable ring seat is fixedly sleeved on the outer circumference of the mechanical seal shaft sleeve, the static ring seat is fixed on the rear end face of the pump cover, the movable ring is fixed with the movable ring seat, the static ring is fixed with the static ring seat, and the contact surface between the movable ring and the static ring is a circumferential surface; the static ring, the static ring seat, the pump cover, the movable ring seat and the movable ring form a mechanical seal cavity; the front end of the movable ring seat is provided with a spiral groove which is used for communicating the mechanical seal cavity with the outside and discharging impurities in the mechanical seal cavity. The technical effects are as follows: the liquid flow in the mechanical seal cavity can be promoted, and compared with the traditional fixed groove, the discharge of impurity particles can be obviously accelerated.
Description
Technical Field
The utility model relates to a self-purification mechanical seal for centrifugal pump in nuclear power field.
Background
Centrifugal pumps are widely used in the field of nuclear power, most of the transported media are seawater or boric acid solution and the like, and generally all contain impurity particles, and meanwhile, the centrifugal pumps generally all use the transported media as flushing liquid for mechanical sealing. Fine foreign particles in the flushing liquid easily enter a mechanical seal cavity of the mechanical seal along with the flushing liquid and enter a contact surface between the moving ring and the static ring, so that the abrasion of the moving ring and the static ring of the mechanical seal is aggravated, and the service life of the mechanical seal is shortened. And the mechanical seal has higher cost and complex replacement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, provide a self-purification mechanical seal for centrifugal pump, it can promote the liquid flow in the machine seal chamber, for traditional fixed slot, can obviously accelerate impurity particle's discharge.
One technical scheme for achieving the above purpose is as follows: a self-cleaning mechanical seal for a centrifugal pump comprises a pump cover fixed with a pump shell of the centrifugal pump, a mechanical seal shaft sleeve fixedly sleeved with the pump shaft of the centrifugal pump, a movable ring seat, a static ring seat, a movable ring and a static ring;
the movable ring seat is fixedly sleeved on the outer circumference of the mechanical seal shaft sleeve, the static ring seat is fixed on the rear end face of the pump cover, the movable ring is fixed with the movable ring seat, the static ring is fixed with the static ring seat, and the contact surface between the movable ring and the static ring is a circumferential surface; the static ring, the static ring seat, the pump cover, the movable ring seat and the movable ring form a mechanical seal cavity;
the front end of the movable ring seat is provided with a spiral groove which is used for communicating the mechanical seal cavity with the outside and discharging impurities in the mechanical seal cavity.
Furthermore, a flushing channel communicated with the mechanical seal cavity is arranged on the pump cover; an annular gap communicated with the flushing channel is reserved between the pump cover and the pump body.
Furthermore, a flushing hole communicated with the mechanical seal cavity is formed in the static ring seat.
And furthermore, the flushing hole is blocked by a plug.
Furthermore, a discharge annular gap corresponding to the spiral groove is reserved between the front end of the movable ring seat and the mechanical seal shaft sleeve.
The technical scheme of the self-purification mechanical seal for the centrifugal pump comprises a pump cover fixed with a pump shell of the centrifugal pump, a machine seal shaft sleeve fixedly sleeved with the pump shaft of the centrifugal pump, a movable ring seat, a static ring seat, a movable ring and a static ring; the movable ring seat is fixedly sleeved on the outer circumference of the mechanical seal shaft sleeve, the static ring seat is fixed on the rear end face of the pump cover, the movable ring is fixed with the movable ring seat, the static ring is fixed with the static ring seat, and the contact surface between the movable ring and the static ring is a circumferential surface; the static ring, the static ring seat, the pump cover, the movable ring seat and the movable ring form a mechanical seal cavity; the front end of the movable ring seat is provided with a spiral groove which is used for communicating the mechanical seal cavity with the outside and discharging impurities in the mechanical seal cavity. The mechanical seal groove has the technical effects that the liquid flow in the mechanical seal cavity is promoted, and compared with the traditional fixed groove, the discharge of impurity particles can be obviously accelerated, and the abrasion of a movable ring and a static ring is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a self-cleaning mechanical seal for a centrifugal pump according to the present invention.
Detailed Description
Referring to fig. 1, in order to better understand the technical solution of the present invention, the inventor of the present invention will now describe in detail the following embodiments with reference to the accompanying drawings:
referring to fig. 1, the self-cleaning mechanical seal for a centrifugal pump of the present invention includes a pump cover 2 fixed to a pump housing 1 of the centrifugal pump, a mechanical seal shaft sleeve 4 fixedly sleeved to a pump shaft of the centrifugal pump, a movable ring seat 7, a stationary ring seat 9, a movable ring 5, and a stationary ring 6.
The movable ring seat 7 is fixedly sleeved on the outer circumference of the mechanical seal shaft sleeve 4, the static ring seat 9 is fixed on the rear end face of the pump cover 2, the rear portion of the movable ring seat 7 is provided with a step face facing the mechanical seal shaft sleeve 4, and the movable ring 5 is fixed with the step face.
The static ring 6 is fixed with the inner circumference of the static ring seat 9, and the contact surface between the dynamic ring 5 and the static ring 6 is a circumferential surface; quiet ring 6, quiet ring holder 9, pump cover 2, rotating ring holder 7 and rotating ring 5 enclose into the utility model discloses a machine seals chamber for self-purification mechanical seal of centrifugal pump.
The front end of the movable ring seat 7 is provided with a spiral groove 3 which is used for communicating the mechanical seal cavity with the outside and discharging impurities in the mechanical seal cavity.
The spiral groove 3 is used for discharging solid particles entering the mechanical seal cavity along with flushing liquid through the spiral groove 3, so that the abrasion of impurity particles to the movable ring 5 and the fixed ring 6 of the mechanical seal is reduced, the service life of the mechanical seal is prolonged, and the maintenance and replacement period is prolonged. The spiral groove 3 can rotate with the pump shaft of the centrifugal pump to facilitate the discharge of solid particles.
And a flushing channel 8 communicated with the mechanical seal cavity is arranged on the pump cover 2. An annular gap 21 communicated with the flushing channel 8 is reserved between the pump cover 2 and the pump body 1. During design of the centrifugal pump, the diameter of solid particle impurities entering the mechanical seal cavity through the flushing channel 8 is controlled by adjusting the width S of the outer annular gap 21 between the pump body 1 and the pump cover 2, and the solid particle impurities with the diameter larger than S are blocked outside the annular gap 21 and directly discharged out of the pump body.
The static ring seat 9 is provided with a flushing hole 91 communicated with the mechanical seal cavity, the flushing hole 91 can be plugged by a plug, and a flushing pipeline is not required to be arranged generally.
And a discharge annular gap 41 corresponding to the spiral groove 3 is reserved between the front end of the movable ring seat 7 and the outer circumference of the mechanical seal shaft sleeve 4, and the widths of the discharge annular gap 41 and the spiral groove 3 are both greater than S.
When the centrifugal pump works, flushing fluid containing solid particle impurities flows through the annular gap 21 between the pump shell 1 and the pump cover 2, flows through the flushing hole 8 arranged in the pump cover 2, enters the mechanical seal cavity, and lubricates and cools a friction pair consisting of the movable ring 5 and the static ring 6. Solid particle impurities in the flushing liquid can enter a pump body flow passage along with the flushing liquid through the spiral groove 3 in the front of the movable ring seat 7 and the discharge annular gap 41 between the movable ring seat 7 and the outer circumference of the mechanical seal shaft sleeve 4 and are discharged along with a transmission medium of the centrifugal pump.
The spiral groove 3 is arranged on the movable ring seat 7, so that the spiral groove 3 can rotate along with the pump shaft. The liquid flow in the mechanical seal cavity is promoted, the discharge of solid particle impurities is accelerated, and compared with the traditional fixed groove, the discharge of impurity particles can be obviously accelerated.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. A self-cleaning mechanical seal for a centrifugal pump comprises a pump cover fixed with a pump shell of the centrifugal pump, a mechanical seal shaft sleeve fixedly sleeved with the pump shaft of the centrifugal pump, a movable ring seat, a static ring seat, a movable ring and a static ring; the method is characterized in that:
the movable ring seat is fixedly sleeved on the outer circumference of the mechanical seal shaft sleeve, the static ring seat is fixed on the rear end face of the pump cover, the movable ring is fixed with the movable ring seat, the static ring is fixed with the static ring seat, and the contact surface between the movable ring and the static ring is a circumferential surface; the static ring, the static ring seat, the pump cover, the movable ring seat and the movable ring form a mechanical seal cavity;
the front end of the movable ring seat is provided with a spiral groove which is used for communicating the mechanical seal cavity with the outside and discharging impurities in the mechanical seal cavity.
2. A self-cleaning mechanical seal for a centrifugal pump as recited in claim 1, wherein: the pump cover is provided with a flushing channel communicated with the mechanical seal cavity; an annular gap communicated with the flushing channel is reserved between the pump cover and the pump shell.
3. A self-cleaning mechanical seal for a centrifugal pump as recited in claim 1, wherein: and the static ring seat is provided with a flushing hole communicated with the mechanical seal cavity.
4. A self-cleaning mechanical seal for a centrifugal pump according to claim 3, wherein: the flushing hole is plugged by a plug.
5. A self-cleaning mechanical seal for a centrifugal pump as recited in claim 1, wherein: and a discharge annular gap corresponding to the spiral groove is reserved between the front end of the movable ring seat and the mechanical seal shaft sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921171956.2U CN210265249U (en) | 2019-07-24 | 2019-07-24 | Self-purification mechanical seal for centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921171956.2U CN210265249U (en) | 2019-07-24 | 2019-07-24 | Self-purification mechanical seal for centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265249U true CN210265249U (en) | 2020-04-07 |
Family
ID=70013755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921171956.2U Active CN210265249U (en) | 2019-07-24 | 2019-07-24 | Self-purification mechanical seal for centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210265249U (en) |
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2019
- 2019-07-24 CN CN201921171956.2U patent/CN210265249U/en active Active
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