CN102777415A - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
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- CN102777415A CN102777415A CN2012102836979A CN201210283697A CN102777415A CN 102777415 A CN102777415 A CN 102777415A CN 2012102836979 A CN2012102836979 A CN 2012102836979A CN 201210283697 A CN201210283697 A CN 201210283697A CN 102777415 A CN102777415 A CN 102777415A
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- impeller
- shaft
- centrifugal pump
- pump
- back side
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Abstract
The invention provides a centrifugal pump in order to solve the problem of shaft abrasion and consumption of shaft sealing pieces in the prior art. The centrifugal pump comprises a transmission shaft, an impeller and a shaft sealing piece, wherein the transmission shaft drives the impeller to rotate; blade sets are symmetrically arranged on front and back of the impeller by taking a thickness centre line of the impeller as a centre, and have the same structure; and a shell of the pump is provided with a bypass pipe, wherein the bypass pipe is arranged in the pump, and is communicated from a side of a liquid inlet of the impeller to another one side of the impeller. In an operation process of the centrifugal pump provided by the invention, pressure on front and back of the impeller are basically the same so as to effectively reduce liquid phase working pressure in a shaft end direction of the impeller, improve a working state of the shaft sealing piece of the impeller, improve abrasion between the impeller shaft and the sealing piece, and reduce power wear. The centrifugal pump is mounted conveniently, and is economical and practical.
Description
Technical field
The present invention relates to a kind of pump, be specifically related to a kind of centrifugal pump.
Background technique
At present, what the shaft sealing of the centrifugal infusion pump of existing technology shaft drive was adopted is mechanical seal, during the impeller blade rotation under action of centrifugal force liquid be discharged into liquid outlet; The liquid that gets into liquid outlet has certain pressure, because impeller blade is arranged on the liquid-inlet direction, and the impeller back side is a plane perpendicular to axle; Because the pump inner chamber body is a continuous space,, and act on the shaft seal assembly so this pressure can be sent in the impeller back side axle one end cavity synchronously; The pressure that acts on the shaft seal equates that with the pressure of liquid port the input power of pump is big more, and lift is high more; This pressure is just big more, and the working condition of shaft seal is just abominable more, scurries out between centers in order to prevent liquid; Sealing will correspondingly strengthen the pressure of axle, so, has strengthened the wearing and tearing between axle and the Sealing on the one hand; Strengthened the power loss of pump on the other hand; If working medium is multi-phase fluid (like a mud), solid phase particles wherein can get under the effect of pressure between axle and the Sealing, and this has just more aggravated the consumption of axle wearing and tearing and shaft seal.
Summary of the invention
For solving the problems such as consumption of wearing and tearing of existing technology axis and shaft seal, the invention provides a kind of centrifugal pump.
A kind of centrifugal pump comprises transmission shaft, impeller and shaft seal, and the transmission shaft impeller is rotated, and it is characterized in that: is that the center is symmetrically arranged with vane group at the impeller front and back with impeller mid-depth line, and structure is identical; And the housing of pump is provided with by-pass line, and is communicated to the opposite side of impeller from liquid entering hole one side of impeller, promptly is communicated to the back side of impeller from the front of impeller.
Further, impeller just, the vane group at the back side through be welded to connect impeller on.
Further, impeller just, back side vane group is provided with 2 blades respectively at least.
Further, the by-pass line sectional area is less than the liquid entering hole sectional area.
The invention has the beneficial effects as follows: impeller is just, the pressure at the back side is basic identical, effectively reduced impeller shaft to working pressure, improve impeller shaft sealing part works state, reduce the wearing and tearing of impeller shaft and Sealing, reduce power and wear and tear.Easy to use rapid, easy to maintenance, simple installation, economical and practical.
Description of drawings
Fig. 1 is a centrifugal pump internal structure schematic representation of the present invention.
Embodiment
In order to make the object of the invention, technological scheme and advantage clearer, below in conjunction with accompanying drawing and embodiment, to further explain of the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is a centrifugal pump internal structure schematic representation of the present invention, and among the figure, 1 is impeller positive blade group, and 2 is impeller back side vane group, and 3 is by-pass line, and 4 is impeller, and 5 is transmission shaft, and 6 is shaft seal.Can know by figure; Centrifugal pump of the present invention comprises transmission shaft 5, impeller 4 and shaft seal 6; Transmission shaft 5 impeller 4 are rotated, and are that the center symmetry is respectively arranged with impeller positive blade group 1 and impeller back side vane group 2 at impeller 4 front and backs with impeller 4 mid-depth lines; A by-pass line 3 is set on the housing of pump; And being communicated to the opposite side of impeller 4 from liquid entering hole one side of impeller 4, by-pass line 3 sectional areas are less than the liquid entering hole sectional area, during transmission shaft 5 rotations; The blade on impeller plate both sides rotates simultaneously; Liquid in the pump cavity is discharged into pump housing liquid outlet under action of centrifugal force, impeller 4 just, back side vane group is respectively arranged with 2 blades, promptly is communicated to the back side of impeller from the front of impeller.The vane group structure on impeller two sides is just the same; Both sides produce suction simultaneously when impeller 4 rotations; The impeller positive blade group 1 of liquid entering hole one side is arranged the liquid of liquid entering hole to liquid outlet and is formed lift, and the attraction force that the impeller back side vane group 2 of impeller 4 opposite sides produces is arranged the liquid of by-pass line 3 to liquid outlet and formed lift.Impeller 4 just, the vane group at the back side through be welded to connect impeller 4 on; Because the blade on impeller plate both sides is just the same; The centrifugal force that produces also is just the same, so when working, the impeller plate just, the pressure at the back side is basic identical; Effectively reduced impeller shaft to working pressure, improve impeller shaft Sealing 6 working staties.Because by-pass line 3 sectional areas are less than the liquid entering hole sectional area; Therefore; The flow of the by-pass line 3 of transmission shaft 5 one end cavitys supply working medium is less than the flow of working medium entrance point, makes transmission shaft 5 one end pump cavitys be in negative pressure state, and the pressure that shaft seal 6 receives becomes normal pressure or even negative pressure; Because the suffered radial pressure of shaft seal 6 is basic identical in the operation of pump with when stopping; So just can reduce the pressure of 6 pairs of transmission shafts 5 of shaft seal, also just reduce power consumpiton, transmission shaft 5 one end pump cavitys when work vacuum magnitude can regulate through the width of blade that increase and decrease by-pass line 3 is crossed the liquid sectional areas or adjusted impeller plate both sides.
The invention has the beneficial effects as follows: impeller is just, the pressure at the back side is basic identical, effectively reduced impeller shaft to working pressure, improve impeller shaft sealing part works state, reduce the wearing and tearing of impeller shaft and Sealing, reduce power and wear and tear.Easy to use rapid, easy to maintenance, simple installation, economical and practical.
Claims (4)
1. a centrifugal pump comprises transmission shaft, impeller and shaft seal, and the transmission shaft impeller is rotated, and it is characterized in that: is that the center is symmetrically arranged with vane group at the impeller front and back with impeller mid-depth line, and structure is identical; And the housing of pump is provided with by-pass line, and is communicated to the opposite side of impeller from liquid entering hole one side of impeller, promptly is communicated to the back side of impeller from the front of impeller.
2. centrifugal pump according to claim 1 is characterized in that, impeller just, the vane group at the back side through be welded to connect impeller on.
3. centrifugal pump according to claim 1 is characterized in that, impeller just, back side vane group is provided with 2 blades respectively at least.
4. centrifugal pump according to claim 1 is characterized in that the by-pass line sectional area is less than the liquid entering hole sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283697.9A CN102777415B (en) | 2012-08-10 | 2012-08-10 | A kind of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283697.9A CN102777415B (en) | 2012-08-10 | 2012-08-10 | A kind of centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777415A true CN102777415A (en) | 2012-11-14 |
| CN102777415B CN102777415B (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210283697.9A Active CN102777415B (en) | 2012-08-10 | 2012-08-10 | A kind of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102777415B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394034Y (en) * | 1999-10-27 | 2000-08-30 | 安徽银龙泵阀股份有限公司 | Pump for producing beer |
| CN201377433Y (en) * | 2009-04-21 | 2010-01-06 | 重庆水泵厂有限责任公司 | Vertical long shaft double-suction pump |
| CN201588810U (en) * | 2010-01-28 | 2010-09-22 | 长沙天鹅工业泵股份有限公司 | Efficient energy-saving vertical pipeline double-suction pump |
| CN102032198A (en) * | 2009-09-29 | 2011-04-27 | 李锦泽 | Novel double-suction high-efficiency submersible motor pump |
| CN202140338U (en) * | 2011-05-13 | 2012-02-08 | 合肥华升泵阀有限责任公司 | Impeller formed by assembling and welding highly resisting cavitation corrosion stainless steel |
| CN202851441U (en) * | 2012-08-10 | 2013-04-03 | 张云亮 | Centrifugal pump |
-
2012
- 2012-08-10 CN CN201210283697.9A patent/CN102777415B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394034Y (en) * | 1999-10-27 | 2000-08-30 | 安徽银龙泵阀股份有限公司 | Pump for producing beer |
| CN201377433Y (en) * | 2009-04-21 | 2010-01-06 | 重庆水泵厂有限责任公司 | Vertical long shaft double-suction pump |
| CN102032198A (en) * | 2009-09-29 | 2011-04-27 | 李锦泽 | Novel double-suction high-efficiency submersible motor pump |
| CN201588810U (en) * | 2010-01-28 | 2010-09-22 | 长沙天鹅工业泵股份有限公司 | Efficient energy-saving vertical pipeline double-suction pump |
| CN202140338U (en) * | 2011-05-13 | 2012-02-08 | 合肥华升泵阀有限责任公司 | Impeller formed by assembling and welding highly resisting cavitation corrosion stainless steel |
| CN202851441U (en) * | 2012-08-10 | 2013-04-03 | 张云亮 | Centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102777415B (en) | 2015-08-26 |
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