CN108443169B - Centrifugal slurry pump with air shaft sealing device - Google Patents
Centrifugal slurry pump with air shaft sealing device Download PDFInfo
- Publication number
- CN108443169B CN108443169B CN201810527619.6A CN201810527619A CN108443169B CN 108443169 B CN108443169 B CN 108443169B CN 201810527619 A CN201810527619 A CN 201810527619A CN 108443169 B CN108443169 B CN 108443169B
- Authority
- CN
- China
- Prior art keywords
- pump
- air
- shaft
- seal
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- 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
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- 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
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a centrifugal slurry pump with air shaft seal device, including pump case, pump cover, impeller in the pump case, the main shaft one end of being connected with the impeller, the main shaft other end wears out the pump case and is connected with the motor, be provided with on the main shaft and be used for with sealed shaft seal device between pump case and the main shaft, the main shaft vertically sets up or personally submits 20~70 degree contained angles's slope setting with the level, shaft seal device includes the sealed gas storage appearance chamber of main shaft wear out the hole with the pump case and sets up in the sealed air's of gas storage appearance chamber first shaft seal, the main shaft alternates in the gas storage appearance intracavity. The sealing life of the slurry centrifugal pump is prolonged by 1-2 times. No cooling water is used for long-term flushing, and water is saved. The defect of cooling water leakage is avoided, and the working environment is cleaned. The integral safety and reliability of the centrifugal slurry pump are improved.
Description
Technical Field
The invention relates to the field of manufacturing of centrifugal slurry pumps, in particular to a pump shaft seal of a centrifugal slurry pump.
Background
The centrifugal slurry pump is a slurry conveying machine which is selected in a large number in various industrial fields in China, and nearly millions of centrifugal slurry pumps run on duty in China.
In the prior art, common shaft seals of a centrifugal pump for conveying slurry comprise a mechanical seal for driving a static ring, a rubber ring seal with a lip, a filler seal and the like, but as all seals are in direct contact with the conveyed slurry to generate abrasion, the pump shaft seal is extremely easy to damage, and no slurry pump with ideal seal is marketed at home and abroad so far.
Moreover, in order to flush and cool the pump shaft seal, an external cooling water device is also arranged, which is troublesome, has the defect of cooling water consumption and has the concern of environmental pollution caused by overflow of the cooling water.
Disclosure of Invention
Aiming at the defects of the prior art, the centrifugal pump with the air shaft sealing device, which can intermittently run without flushing with cooling water, has good shaft sealing performance and 2-3 times of the service life of the shaft sealing, can not only convey slurry, but also convey volatile liquid and other clear liquid mediums.
In order to achieve the aim of the invention, the following technical scheme is provided: the centrifugal slurry pump with the air shaft sealing device comprises a pump shell, a pump cover, an impeller in the pump shell, and one end of a main shaft connected with the impeller, wherein the other end of the main shaft penetrates out of the pump shell and is connected with a motor, and the main shaft is provided with the shaft sealing device for sealing the pump shell and the main shaft.
Preferably, the bottom end of the gas storage cavity is provided with a second shaft seal for sealing the slurry.
Preferably, the height between the topmost end and the bottommost end of the gas storage cavity is 5cm-30cm.
Preferably, the first shaft seal is a mechanical seal or a magnetic fluid seal driving the stationary ring or a magnetic attraction seal driving the stationary ring.
Preferably, the second shaft seal is a lip rubber ring seal or a mechanical seal or a packing seal driving a static ring.
Preferably, a wind wheel is arranged on the main shaft above the first shaft seal.
Preferably, the gas storage cavity is provided with a flushing hole.
Preferably, the first shaft seal bottom end is provided with an anti-corrosion sealing ring.
Preferably, a signal sensor is arranged in the gas storage cavity, and the signal sensor is externally connected with an alarm system.
Preferably, a pump suction port is provided at a shaft seal portion of the pump casing, and a suction port tee is provided.
The centrifugal slurry pump comprises a metal pump, a plastic pump and a plastic-lined centrifugal pump.
The centrifugal slurry pump can be a front suction type centrifugal pump or a side suction type centrifugal pump.
The impeller is provided with a back blade.
The back blade may be in the shape of a radial spoke or a curved blade, preferably in the shape of a radial spoke.
The lip ring seal is modified tetrafluoro.
The lip ring seal is of a combined structure.
The air accumulation in the air storage cavity is air which is conveyed in the pump cavity and is used for compressing air originally stored in the sealing position and pushing the compressed air to the later sealing position.
The basic working principle of the invention is as follows: when the pump operates, air in the air storage cavity at the sealing part of the pump shaft is pushed by liquid in the pump cavity to accumulate in the air storage cavity under the action of the first shaft seal, and the air is accumulated in the cavity in a sealing way, so that the first shaft seal cannot contact the liquid in the pump cavity, and the service life of the first shaft seal is effectively prolonged.
In order to consider the effect of accumulating gas in the gas storage cavity and the convenience in maintenance and installation, the pump machine can be changed from vertical installation into inclined installation, so that the effect of accumulating gas is achieved, and maintenance and lifting can be facilitated.
The oblique body is arranged in such a way that the motor end is higher than the pump body.
The slope of the pump diagonal loading can be selected between 20 and 70 degrees.
The invention has the beneficial effects that: the sealing life of the slurry centrifugal pump is prolonged by 1-2 times. No cooling water is used for long-term flushing, and water is saved. The defect of cooling water leakage is avoided, and the working environment is cleaned. The integral safety and reliability of the centrifugal slurry pump are improved.
Drawings
Fig. 1 is a schematic diagram of the structure of a front suction centrifugal pump of the present invention.
Fig. 2 is a schematic diagram of the oblique assembly of the centrifugal pump of the present invention.
Fig. 3 is an enlarged view of part a of fig. 1 (the front seal is a lip-shaped rubber ring seal, and the rear seal is a magnetic fluid seal).
Fig. 4 shows another embodiment of fig. 3 (both front and rear seals are lip rubber ring seals).
Fig. 5 shows a further embodiment of fig. 3 (front seal is a lip-shaped rubber ring seal, rear seal is a magnetic fluid seal, and a corrosion protection seal ring is provided).
Fig. 6 is a partial enlarged view of a portion a in fig. 5.
Fig. 7 shows a further embodiment of fig. 3 (the sealing outer jacket is provided with flushing means).
Fig. 8 shows a further embodiment of fig. 3 (front seal is a lip rubber ring seal, rear seal is a magnetic seal).
Fig. 9 is a partial enlarged view of a portion a in fig. 8.
Fig. 10 is a schematic view of the structure of the rear suction centrifugal pump of the present invention.
Fig. 11 shows another structural form of the portion a in fig. 10 (the front seal is a lip-shaped rubber ring seal, and the rear seal is a magnetic fluid seal of an inner and outer magnetic steel structure with plastic wrapped outside).
Fig. 12 is a partial enlarged view of a portion a in fig. 11.
Detailed Description
Example 1: (see FIG. 1 to 9)
The utility model provides a centrifugal slurry pump with air shaft seal device, including pump case 2, pump cover 3, impeller 4 in the pump case 2, the main shaft 1 one end of being connected with impeller 4, main shaft 1 other end wears out pump case 2 and is connected with motor 6, be provided with on the main shaft 1 and be used for the sealed shaft seal device between pump case 2 and the main shaft 1, main shaft 1 vertical setting or with the horizontal personally submit 20~70 degree contained angle's slope setting, shaft seal device includes the sealed gas storage appearance chamber 5.3 of main shaft 1 wear out the hole with pump case 2 and sets up in the sealed air's in gas storage appearance chamber 5.3 first shaft seal, main shaft 1 alternates in gas storage appearance chamber 5.3. The first shaft seal and the second shaft seal are connected through an outer sealing sleeve 5.4, an air storage cavity 5.3 is formed in the outer sealing sleeve 5.4, and the whole pump body of the centrifugal slurry pump is arranged on the pump mounting bracket 11. The first shaft seal is a magnetic fluid seal 5.2.1, and the second shaft seal is a lip seal ring 5.1.1.
When the pump works, air at the sealing part is accumulated in the air storage cavity 5.3, the lip-shaped sealing ring 5.1.1 at the lower part is contacted with slurry in the sealing pump cavity, and the magnetic fluid seal 5.2.1 at the upper part is contacted with the air and seals airtight gas. When the pump operates, the air pressure enclosed in the air storage cavity 5.3 is increased, and the pressure equal to the pressure of fluid in the pump cavity is reached, so that the pressure inside and outside the lip-shaped sealing ring 5.1.1 is basically balanced, the lip-shaped rubber ring 5.1.1 operates under the condition of no pressure difference, the lip-shaped rubber ring 5.1.1 cannot be worn, and the service life of the lip-shaped rubber ring 5.1.1 is prolonged. The pressurized gas enclosed in the gas storage chamber 5.3 actually plays a role in protecting the safe operation of the second shaft seal. Because of the sealing effect of the first shaft seal, the pressure of the air in the air storage cavity 5.3 and the pressure of the fluid in the pump cavity are basically in the same state, so that the pressures at the two sides of the second shaft seal are equal, and the seal operates in an inner and outer equal pressure state, thereby greatly prolonging the service life of the second shaft seal.
In order to provide a sufficient amount of air in the air-storage chamber, it is preferable to increase the distance between the lip-shaped rubber ring 5.1.1 and the magnetic fluid combined seal 5.2.1.
In order to facilitate maintenance and installation and to enable air to be stored in the air storage chamber 5.3, the pump is preferably mounted on the bracket 11 in an inclined manner (see fig. 2).
In order to flush a small amount of slurry in the gas storage cavity 5.3, a flushing hole 5.5 (as shown in fig. 7) is formed in the outer sealing sleeve between the lip-shaped rubber seal 5.1.1 and the magnetic fluid seal 5.2.1, so that when the lip-shaped seal ring 5.1.1 fails, a small amount of slurry enters the gas storage cavity, and the aim of cleaning is achieved.
In order to reduce the temperature generated by the magnetic fluid seal 5.2.1 during operation, the effective method is to arrange a wind wheel 7 on the main shaft outside the magnetic fluid seal 5.2.1 and blow the temperature of the sealing part by wind.
In order to prevent the corrosive gas in the gas storage cavity from corroding the magnet seal and affecting the sealing life, a better method is to arrange a corrosion-proof sealing ring 5.6 (as shown in fig. 5 and 6) at the contact part of the magnet seal and the gas.
In order to save manufacturing cost, the magnetic attraction seal 5.2.3 driving the static ring can be used for replacing the magnetic fluid seal (as shown in fig. 8 and 9), and the replacement is still within the scope of the invention.
Example 2: (see FIG. 10 to 12)
In the centrifugal pump according to the first embodiment, the pump intake port 12 may be provided at a sealing portion of the pump, and the intake port tee 12.1 may be provided for convenience of installation.
Example 3: the utility model provides a centrifugal slurry pump with air shaft seal device, including pump case 2, pump cover 3, impeller 4 in the pump case 2, the main shaft 1 one end of being connected with impeller 4, main shaft 1 other end wears out pump case 2 and is connected with motor 6, be provided with on the main shaft 1 and be used for the sealed shaft seal device between pump case 2 and the main shaft 1, main shaft 1 vertical setting or with the horizontal personally submit 20~70 degree contained angle's slope setting, shaft seal device includes the sealed gas storage appearance chamber 5.3 of main shaft 1 wear out the hole with pump case 2 and sets up in the sealed air's in gas storage appearance chamber 5.3 first shaft seal, main shaft 1 alternates in gas storage appearance chamber 5.3. The outer sealing sleeve 5.4 is arranged and is in sealing connection with the first shaft, the bottom end of the outer sealing sleeve 5.4 is in sealing connection with the main shaft 1 outgoing hole of the pump shell 2, the air storage cavity is formed in the outer sealing sleeve 5.4, the height between the topmost end and the bottommost end of the air storage cavity 5.3 is 20cm, the slurry can be prevented from being in sealing contact with the first shaft without arranging the second shaft seal, and the height of the air storage cavity 5.3 is ensured to be more than 5 cm.
In order to save cost, in the above embodiment, besides the magnetic fluid seal 5.2.1, the first shaft seal can also be implemented by selecting various seal structures for sealing air with economical price.
The sealing of various sealing air comprises modified F4 sealing, and the sealing which is air-resistant and can run idle can be selected.
In order to improve the corrosion resistance of the pump and enable the pump to convey highly corrosive liquid, the effective method is to seal the first shaft of the sealing gas to manufacture the magnetic fluid seal 5.2.4 of the inner and outer magnetic steel structures which are covered with plastic, so that the sealing gas can be sealed, and the corrosion of the corrosive gas can be prevented.
In order to improve the safety performance of sealing, a better method is to arrange a signal sensor 13 in the sealed air storage cavity and connect with an external alarm system, and when liquid leakage enters the air storage cavity, the system can alarm to remind maintenance personnel to carry out preventive maintenance.
In the invention, the components of the pump shell 2, the pump cover 3, the impeller 4 and the like are not obviously different from the prior art, and the manufacturing materials can also be metal, plastic, rubber or composite manufacturing of the materials.
The structure and implementation method exemplified in the embodiment of the invention are only preferred by the inventor, do not represent the whole thought and scheme of the invention, and other people have the equivalent replacement sealing structure and material replacement, so long as the front and rear sets of shaft seals are arranged, the pump is vertically or obliquely arranged, and the combination of the basic invention features of the gas storage cavity 5.3 is within the coverage range of the invention and is protected by rights.
Claims (8)
1. The centrifugal slurry pump with air shaft sealing device includes pump shell, pump cover, impeller in the pump shell, one end of main shaft connected with impeller, the other end of main shaft is passed through the pump shell and connected with motor, and on the main shaft a shaft sealing device for sealing between pump shell and main shaft is set, and is characterized by that the main shaft is vertically set or inclined with horizontal surface at an included angle of 20-70 deg. and includes air-storing cavity sealed with main shaft pass-through hole of pump shell and first shaft seal capable of sealing air set in top end of air-storing cavity, the main shaft is passed through in the air-storing cavity, the bottom end of air-storing cavity is equipped with second shaft seal for sealing slurry, the height between top end and bottom end of air-storing cavity is 5cm-30cm, and the first shaft seal is mechanical seal for driving static ring or magnetic fluid seal or magnetic attraction seal for driving static ring.
2. A centrifugal slurry pump with an air shaft seal according to claim 1, wherein the second shaft seal is a lip rubber ring seal or a mechanical seal or a packing seal driving a stationary ring.
3. A centrifugal slurry pump with an air shaft seal according to claim 1, characterized in that a wind wheel is arranged on the main shaft above the first shaft seal.
4. A centrifugal slurry pump with an air shaft seal according to claim 1, wherein the air reservoir is provided with a flushing hole.
5. A centrifugal slurry pump with an air shaft seal according to claim 1, the anti-corrosion sealing ring is arranged at the sealed bottom end of the first shaft.
6. The centrifugal slurry pump with the air shaft sealing device according to claim 1, wherein a signal sensor is arranged in the air storage cavity, and the signal sensor is externally connected with an alarm system.
7. A centrifugal slurry pump with an air shaft seal according to claim 1, wherein the shaft seal portion of the pump housing is provided with a pump intake port and with a suction port tee.
8. A centrifugal slurry pump with an air shaft seal according to claim 1, wherein the pump cover is provided with suction ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527619.6A CN108443169B (en) | 2018-05-29 | 2018-05-29 | Centrifugal slurry pump with air shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527619.6A CN108443169B (en) | 2018-05-29 | 2018-05-29 | Centrifugal slurry pump with air shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108443169A CN108443169A (en) | 2018-08-24 |
| CN108443169B true CN108443169B (en) | 2024-08-02 |
Family
ID=63204936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810527619.6A Active CN108443169B (en) | 2018-05-29 | 2018-05-29 | Centrifugal slurry pump with air shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108443169B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324701A (en) * | 2020-11-22 | 2021-02-05 | 宜兴市宙斯泵业有限公司 | Corrosion-resistant high-pressure vertical centrifugal pump |
| CN112324699A (en) * | 2020-11-22 | 2021-02-05 | 宜兴市宙斯泵业有限公司 | Slurry vertical centrifugal pump |
| CN112324700A (en) * | 2020-11-22 | 2021-02-05 | 宜兴市宙斯泵业有限公司 | High-pressure slurry vertical centrifugal pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865142A (en) * | 2010-05-17 | 2010-10-20 | 张继华 | Multi-level submerged pump with leak detecting and alarming device |
| CN102536910A (en) * | 2012-02-17 | 2012-07-04 | 江苏克劳斯重工股份有限公司 | Pump gas-liquid sealing water outlet pipe |
| CN105864096A (en) * | 2016-05-18 | 2016-08-17 | 湖南南方长河泵业有限公司 | Singe-stage double-suction split case pump with good sealing performance |
| CN208311060U (en) * | 2018-05-29 | 2019-01-01 | 宜兴市宙斯泵业有限公司 | A kind of centrifugation shurry pump with air shaft sealing device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3383033A (en) * | 1966-04-27 | 1968-05-14 | Gen Electric | Sealing means for axial flow compressor discharge |
| DE2355456C3 (en) * | 1973-11-06 | 1981-09-10 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Multi-circuit protection valve for compressed air systems for vehicles, in particular compressed air brake systems for road vehicles |
| AU538118B2 (en) * | 1979-10-29 | 1984-08-02 | Rockwell International Inc. | Seal assembly |
| AU2002300143A1 (en) * | 2002-02-11 | 2003-08-28 | Gradidge, Robert Charles | Sealing Arrangement And Method |
| AU2003902582A0 (en) * | 2003-05-23 | 2003-06-12 | Weir Warman Ltd | Pressure relief arrangement for a pump |
| CN1614239A (en) * | 2004-08-09 | 2005-05-11 | 中国航天科技集团公司第一研究院第十五研究所 | Magnetic liquid sealing structure of cryogenic pump |
-
2018
- 2018-05-29 CN CN201810527619.6A patent/CN108443169B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865142A (en) * | 2010-05-17 | 2010-10-20 | 张继华 | Multi-level submerged pump with leak detecting and alarming device |
| CN102536910A (en) * | 2012-02-17 | 2012-07-04 | 江苏克劳斯重工股份有限公司 | Pump gas-liquid sealing water outlet pipe |
| CN105864096A (en) * | 2016-05-18 | 2016-08-17 | 湖南南方长河泵业有限公司 | Singe-stage double-suction split case pump with good sealing performance |
| CN208311060U (en) * | 2018-05-29 | 2019-01-01 | 宜兴市宙斯泵业有限公司 | A kind of centrifugation shurry pump with air shaft sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108443169A (en) | 2018-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108443169B (en) | Centrifugal slurry pump with air shaft sealing device | |
| CN101482122A (en) | Vertical shield pump | |
| CN112324699A (en) | Slurry vertical centrifugal pump | |
| CN202926645U (en) | Self-sucking pump with mechanical seal liquid self-circulation function | |
| CN201053396Y (en) | Single-stage single-suction condensation pump | |
| CN208311060U (en) | A kind of centrifugation shurry pump with air shaft sealing device | |
| CN207598560U (en) | A kind of sea water desalination booster pump bearing assembly device | |
| CN201297293Y (en) | Unit construction centrifugal pump with easy-to-disassemble axil | |
| CN213981316U (en) | Slurry vertical centrifugal pump | |
| CN211009254U (en) | Sealing structure of long-shaft submerged pump and long-shaft submerged pump | |
| CN201148990Y (en) | Pump shaft mechanical sealing device | |
| CN110552889B (en) | Leakage-free centrifugal pump | |
| CN2324339Y (en) | Centrifugal oil-sealed gas sealing device for rotation axis | |
| CN203430808U (en) | Acid-alkali resisting ceramic vacuum pump | |
| CN215058230U (en) | Vertical centrifugal slurry pump | |
| CN2365429Y (en) | Vertical non-leakage corrosion resisting pump | |
| CN205064356U (en) | Vacuum pump sealing device | |
| CN215058228U (en) | Energy-saving efficient centrifugal pump | |
| CN216407206U (en) | Gas isolation sealing structure | |
| CN209261901U (en) | Sealing structure of starch milk pump | |
| CN110792627A (en) | Large-scale vertical axial-flow pump water guide bearing circulating water system | |
| CN215256835U (en) | Double-suction pump | |
| CN222350937U (en) | Gel pumping gear pump | |
| CN217107474U (en) | Rubber diaphragm decompression seal structure | |
| JPH03206389A (en) | Pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |