CN109281872B - Mechanical seal flushing device of centrifugal pump and manufacturing process thereof - Google Patents

Mechanical seal flushing device of centrifugal pump and manufacturing process thereof Download PDF

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Publication number
CN109281872B
CN109281872B CN201811134966.9A CN201811134966A CN109281872B CN 109281872 B CN109281872 B CN 109281872B CN 201811134966 A CN201811134966 A CN 201811134966A CN 109281872 B CN109281872 B CN 109281872B
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mechanical seal
connecting cylinder
centrifugal pump
cylinder
inner cavity
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CN109281872A (en
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朱兆林
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Anhui Hua Ke Co ltd
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Anhui Hua Ke Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a mechanical seal flushing device of a centrifugal pump, which comprises: the middle part of the upper end of the centrifugal pump body is provided with a water outlet pipe, the side edge of the water outlet pipe is connected with a hydrocyclone separator through a water conduit, the lower end of the hydrocyclone separator is connected to the upper end of the connecting cylinder through a pipeline, and the pipeline is communicated with the inner cavity of the connecting cylinder; the surface of the first mechanical seal is provided with a spiral diversion channel, the first mechanical seal is also arranged in the inner cavity of the connecting cylinder, and the first mechanical seal is positioned on the left side of the connecting cylinder; the second mechanical seal is fixedly connected to the left end of the connecting cylinder, the second mechanical seal comprises a first inserting cylinder, a second inserting cylinder and an end cover disc which are integrally formed and sequentially increased in diameter from right to left, and the first inserting cylinder is inserted into the inserting opening formed in the left end of the first mechanical seal. The invention has a circulating filtration function on the flushing liquid, and effectively prevents the blockage of the flushing liquid; the first mechanical seal and the second mechanical seal are convenient to assemble and simple to disassemble.

Description

Mechanical seal flushing device of centrifugal pump and manufacturing process thereof
Technical Field
The invention belongs to the technical field of centrifugal pump mechanical seal flushing devices, and particularly relates to a centrifugal pump mechanical seal flushing device and a manufacturing process thereof.
Background
The mechanical seal is an important shaft seal form in centrifugal pump equipment, high-speed rotation of a pump can enable a dynamic and static sealing surface of the mechanical seal to generate high temperature, and a mechanical seal flushing system is used for lubricating and cooling the dynamic and static sealing surface of the mechanical seal through flushing the mechanical seal.
The existing mechanical seal flushing device can not well filter the liquid for flushing, so that the flushing liquid is easily blocked on the mechanical seal and is not beneficial to flushing and cooling, and meanwhile, the mechanical seal is inconvenient to disassemble and assemble and is not beneficial to disassembling and cleaning.
To this end, we propose a mechanical seal flushing device of centrifugal pump and its manufacturing process to solve the above mentioned problems in the background art.
Disclosure of Invention
The invention aims to provide a mechanical seal flushing device of a centrifugal pump and a manufacturing process thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a centrifugal pump mechanical seal flushing arrangement comprising:
the centrifugal pump body is provided with a connecting cylinder in the middle of the left end, the wall of an inner cavity on the right side of the connecting cylinder is provided with a limiting convex ring, and the inner cavity of the connecting cylinder is provided with a filter screen ring positioned on the left side of the limiting convex ring;
the middle part of the upper end of the centrifugal pump body is provided with a water outlet pipe, the side edge of the water outlet pipe is connected with a hydrocyclone separator through a water conduit, the lower end of the hydrocyclone separator is connected to the upper end of the connecting cylinder through a pipeline, and the pipeline is communicated with the inner cavity of the connecting cylinder;
the surface of the first mechanical seal is provided with a spiral diversion channel, the first mechanical seal is also arranged in the inner cavity of the connecting cylinder, and the first mechanical seal is positioned on the left side of the connecting cylinder;
the second mechanical seal is fixedly connected to the left end of the connecting cylinder, the second mechanical seal comprises a first inserting cylinder, a second inserting cylinder and an end cover disc which are integrally formed and sequentially increased in diameter from right to left, and the first inserting cylinder is inserted into the inserting opening formed in the left end of the first mechanical seal.
Preferably, a bearing penetrating through the pump shaft is installed in the first insertion cylinder of the second mechanical seal, and the right end of the pump shaft penetrates through the first mechanical seal, the filter screen ring and the limiting protruding ring and extends into the inner cavity of the centrifugal pump body.
Preferably, the right end of the pump shaft is connected with an impeller, the impeller is located in an inner cavity of the centrifugal pump body, and a water inlet pipe is arranged in the middle of the right end of the centrifugal pump body.
Preferably, the end cap plate is fixed to the left end of the connecting cylinder by a screw.
The invention also provides a manufacturing process of the mechanical seal flushing device of the centrifugal pump, which comprises the following steps:
s1, turning the surface of the first mechanical seal out of a spiral diversion channel, then installing a filter screen ring in the connecting cylinder to enable the right end of the filter screen ring to abut against the limiting raised ring, and finally installing the first mechanical seal in the connecting cylinder to enable the right end of the first mechanical seal to abut against the left end of the filter screen ring;
s2, connecting the side edge of the water outlet pipe with a hydrocyclone separator through a water conduit, connecting the lower end of the hydrocyclone separator with the upper end of the connecting cylinder through a pipeline, and communicating the pipeline with the inner cavity of the connecting cylinder;
s3, the end cover plate is fixed at the left end of the connecting cylinder through screws, the first inserting cylinder is inserted into the inserting opening formed in the left end of the first mechanical seal, and a bearing penetrating through the pump shaft is installed in the first inserting cylinder.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a centrifugal pump mechanical seal flushing device and a manufacturing process thereof.A liquid enters a hydrocyclone separator through a water conduit, under the centrifugal action of the hydrocyclone separator, a clear liquid flows into an inner cavity of a connecting cylinder through a pipeline at the lower end of the hydrocyclone separator and finally flows to a spiral splitter box on the surface of a first mechanical seal, and the liquid circulates in the spiral splitter box to realize flushing and heat dissipation of the first mechanical seal; meanwhile, the turbid liquid flows into the inner cavity of the centrifugal pump body after being filtered by the filter screen ring, and the turbid liquid has a circulating filtering effect on the flushing liquid, so that the blockage of the flushing liquid is effectively prevented;
the filter screen ring is arranged in the connecting cylinder, so that the right end of the filter screen ring is abutted against the limiting raised ring, and finally, the first mechanical seal is also arranged in the connecting cylinder, so that the right end of the first mechanical seal is abutted against the left end of the filter screen ring; the end cover disc is fixed at the left end of the connecting cylinder through the screw, the first inserting cylinder is inserted into the inserting opening formed in the left end of the first mechanical seal, and the bearing penetrating through the pump shaft is installed in the first inserting cylinder, so that the first mechanical seal and the second mechanical seal are convenient to assemble and easy to disassemble.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of a second mechanical seal and bearing connection of the present invention;
fig. 3 is a schematic view of a first mechanical seal and screen ring attachment configuration of the present invention.
In the figure: the centrifugal pump comprises a pump shaft 1, a second mechanical seal 2, an end cover disc 21, a second insertion cylinder 22, a first insertion cylinder 23, a screw 3, a bearing 4, a first mechanical seal 5, an insertion opening 51, a hydrocyclone 6, a connecting cylinder 7, an impeller 8, a water inlet pipe 9, a limiting raised ring 10, a water outlet pipe 11, a filter screen ring 12, a centrifugal pump body 13, a water conduit 14 and a spiral diversion trench 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a centrifugal pump mechanical seal flushing device as shown in figures 1-3, comprising:
the centrifugal pump body 13 is provided with a connecting cylinder 7 in the middle of the left end, the wall of the inner cavity on the right side of the connecting cylinder 7 is provided with a limiting raised ring 10, and the inner cavity of the connecting cylinder 7 is provided with a filter screen ring 12 positioned on the left side of the limiting raised ring 10;
a water outlet pipe 11 is arranged in the middle of the upper end of the centrifugal pump body 13, the side edge of the water outlet pipe 11 is connected with a hydrocyclone 6 through a water conduit 14, the lower end of the hydrocyclone 6 is connected to the upper end of the connecting cylinder 7 through a pipeline, and the pipeline is communicated with the inner cavity of the connecting cylinder 7;
the surface of the first mechanical seal 5 is provided with a spiral diversion channel 15, the first mechanical seal 5 is also arranged in the inner cavity of the connecting cylinder 7, and the first mechanical seal 5 is positioned on the left side of the connecting cylinder 7;
the second mechanical seal 2 is fixedly connected to the left end of the connecting cylinder 7, the second mechanical seal 2 comprises a first inserting cylinder 23, a second inserting cylinder 22 and an end cover disc 21 which are integrally formed and are sequentially increased in diameter from right to left, and the first inserting cylinder 23 is inserted into the inserting opening 51 formed in the left end of the first mechanical seal 5.
Specifically, a bearing 4 penetrating through the pump shaft 1 is installed in a first insertion barrel 23 of the second mechanical seal 2, and the right end of the pump shaft 1 penetrates through the first mechanical seal 5, the filter screen ring 12 and the limiting raised ring 10 and extends into an inner cavity of the centrifugal pump body 13.
Specifically, the right end of the pump shaft 1 is connected with an impeller 8, the impeller 8 is located in an inner cavity of a centrifugal pump body 13, and a water inlet pipe 9 is arranged in the middle of the right end of the centrifugal pump body 13.
Specifically, the end cap plate 21 is fixed to the left end of the connecting cylinder 7 by a screw 3.
The invention also provides a manufacturing process of the mechanical seal flushing device of the centrifugal pump, which comprises the following steps:
s1, turning the surface of the first mechanical seal 5 out of the spiral diversion channel 15, then installing the filter screen ring 12 in the connecting cylinder 7 to enable the right end of the filter screen ring 12 to abut against the limiting raised ring 10, and finally installing the first mechanical seal 5 in the connecting cylinder 7 to enable the right end of the first mechanical seal 5 to abut against the left end of the filter screen ring 12;
s2, connecting the side edge of the water outlet pipe 11 with the hydrocyclone 6 through the water conduit 14, connecting the lower end of the hydrocyclone 6 with the upper end of the connecting cylinder 7 through a pipeline, and communicating the pipeline with the inner cavity of the connecting cylinder 7;
s3, the end cover disc 21 is fixed at the left end of the connecting cylinder 7 through the screw 3, the first inserting cylinder 23 is inserted into the inserting opening 51 formed in the left end of the first mechanical seal 5, and the bearing 4 penetrating through the pump shaft 1 is installed in the first inserting cylinder 23.
In summary, compared with the prior art, the liquid of the present invention enters the hydrocyclone 6 through the water conduit 14, under the centrifugal action of the hydrocyclone 6, the clear liquid flows into the inner cavity of the connecting cylinder 7 through the pipeline at the lower end of the hydrocyclone 6, and finally flows to the spiral splitter 15 on the surface of the first mechanical seal 5, and the liquid circulates in the spiral splitter 15, so as to realize the washing and heat dissipation of the first mechanical seal 5; meanwhile, the turbid liquid flows into the inner cavity of the centrifugal pump body 13 after being filtered by the filter screen ring 12, and the turbid liquid has a circulating filtering effect on the flushing liquid, so that the blockage of the flushing liquid is effectively prevented;
the filter screen ring 12 is arranged in the connecting cylinder 7, so that the right end of the filter screen ring 12 is abutted against the limiting raised ring 10, and finally the first mechanical seal 5 is also arranged in the connecting cylinder 7, so that the right end of the first mechanical seal 5 is abutted against the left end of the filter screen ring 12; the end cover disc 21 is fixed at the left end of the connecting cylinder 7 through the screw 3, the first inserting cylinder 23 is inserted into the inserting opening 51 formed in the left end of the first mechanical seal 5, and the bearing 4 penetrating through the pump shaft 1 is installed in the first inserting cylinder 23, so that the first mechanical seal 5 and the second mechanical seal 2 are convenient to assemble and easy to disassemble.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (5)

1. A centrifugal pump mechanical seal washing unit characterized by comprising:
the centrifugal pump comprises a centrifugal pump body (13), wherein a connecting cylinder (7) is arranged in the middle of the left end of the centrifugal pump body, a limiting convex ring (10) is arranged on the wall of an inner cavity on the right side of the connecting cylinder (7), and a filter screen ring (12) positioned on the left side of the limiting convex ring (10) is arranged in the inner cavity of the connecting cylinder (7);
a water outlet pipe (11) is arranged in the middle of the upper end of the centrifugal pump body (13), the side edge of the water outlet pipe (11) is connected with a hydrocyclone (6) through a water conduit (14), the lower end of the hydrocyclone (6) is connected to the upper end of the connecting cylinder (7) through a pipeline, and the pipeline is communicated with the inner cavity of the connecting cylinder (7);
the surface of the first mechanical seal (5) is provided with a spiral diversion channel (15), the first mechanical seal (5) is also arranged in the inner cavity of the connecting cylinder (7), and the first mechanical seal (5) is positioned on the left side of the connecting cylinder (7);
the second mechanical seal (2) is fixedly connected to the left end of the connecting cylinder (7), the second mechanical seal (2) comprises a first plug-in cylinder (23), a second plug-in cylinder (22) and an end cover disc (21), wherein the first plug-in cylinder (23) is integrally formed and the diameter of the first plug-in cylinder is increased in sequence from right to left, and the first plug-in cylinder (23) is plugged into the left end of the first mechanical seal (5) and is provided with a plug-in opening (51).
2. A centrifugal pump mechanical seal washing unit according to claim 1, characterized in that: the pump is characterized in that a bearing (4) penetrating through the pump shaft (1) is installed in a first inserting cylinder (23) of the second mechanical seal (2), and the right end of the pump shaft (1) penetrates through the first mechanical seal (5), the filter screen ring (12) and the limiting raised ring (10) and extends into an inner cavity of the centrifugal pump body (13).
3. A centrifugal pump mechanical seal washing unit according to claim 1, characterized in that: the right end of the pump shaft (1) is connected with an impeller (8), the impeller (8) is positioned in the inner cavity of the centrifugal pump body (13), and the middle part of the right end of the centrifugal pump body (13) is provided with a water inlet pipe (9).
4. A centrifugal pump mechanical seal washing unit according to claim 1, characterized in that: the end cover disc (21) is fixed at the left end of the connecting cylinder (7) through a screw (3).
5. A process for manufacturing a mechanical seal washing unit of a centrifugal pump according to claim 1, wherein: the method specifically comprises the following steps:
s1, turning the surface of the first mechanical seal (5) out of a spiral diversion channel (15), then installing a filter screen ring (12) in a connecting cylinder (7) to enable the right end of the filter screen ring (12) to abut against a limiting raised ring (10), and finally installing the first mechanical seal (5) in the connecting cylinder (7) to enable the right end of the first mechanical seal (5) to abut against the left end of the filter screen ring (12);
s2, connecting the side edge of the water outlet pipe (11) with a hydrocyclone (6) through a water conduit (14), connecting the lower end of the hydrocyclone (6) with the upper end of the connecting cylinder (7) through a pipeline, and communicating the pipeline with the inner cavity of the connecting cylinder (7);
s3, the end cover disc (21) is fixed at the left end of the connecting cylinder (7) through the screw (3), the first inserting cylinder (23) is inserted into the inserting opening (51) arranged at the left end of the first mechanical seal (5), and the bearing (4) penetrating through the pump shaft (1) is installed in the first inserting cylinder (23).
CN201811134966.9A 2018-09-28 2018-09-28 Mechanical seal flushing device of centrifugal pump and manufacturing process thereof Active CN109281872B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110566467B (en) * 2019-09-16 2020-11-10 江苏飞跃机泵集团有限公司 A waste water circulating pump device for high enriched waste water evaporation equipment of thermal power plant
CN111420446A (en) * 2020-04-14 2020-07-17 山东京博中聚新材料有限公司 Colloidal particle pump with pipe network type colloidal particle water-tight seal flusher
CN114838004A (en) * 2022-05-11 2022-08-02 安徽南方化工泵业有限公司 Mechanical seal flushing device of centrifugal pump

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN201176953Y (en) * 2008-03-16 2009-01-07 张金利 Centrifugal pump helix seal axle sleeve
CN102384102A (en) * 2010-08-31 2012-03-21 杨燕 Mechanical seal of anti-corrosion centrifugal pump
CN105570183A (en) * 2015-12-10 2016-05-11 安徽凯特泵业有限公司 Centrifugal pump for automobile manufacturing and paint spraying process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017119882A1 (en) * 2016-01-07 2017-07-13 Stein Seal Company Slurry seal assembly
US10502221B2 (en) * 2016-02-11 2019-12-10 Baker Hughes, A Ge Company, Llc Load sharing spring for tandem thrust bearings of submersible pump assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201176953Y (en) * 2008-03-16 2009-01-07 张金利 Centrifugal pump helix seal axle sleeve
CN102384102A (en) * 2010-08-31 2012-03-21 杨燕 Mechanical seal of anti-corrosion centrifugal pump
CN105570183A (en) * 2015-12-10 2016-05-11 安徽凯特泵业有限公司 Centrifugal pump for automobile manufacturing and paint spraying process

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