CN105065321A - Backmixing-free fluid transfer pump - Google Patents
Backmixing-free fluid transfer pump Download PDFInfo
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- CN105065321A CN105065321A CN201510482751.6A CN201510482751A CN105065321A CN 105065321 A CN105065321 A CN 105065321A CN 201510482751 A CN201510482751 A CN 201510482751A CN 105065321 A CN105065321 A CN 105065321A
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- pump
- impeller
- fluid delivery
- fluid
- backmixing
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Abstract
Disclosed is a backmixing-free fluid transfer pump. The backmixing-free fluid transfer pump comprises a pump case, an impeller and a pump shaft, wherein the pump shaft is arranged in the pump case, and the impeller is installed on the pump shaft. The backmixing-free fluid transfer pump is characterized in that a sealing sleeve which is used for preventing fluid backmixing is arranged in a gap formed between the inlet of the impeller and the pump case. By the adoption of the backmixing-free fluid transfer pump, the overall structure is stable, the sealing performance is good, the phenomena of fluid backmixing and power loss are effectively avoided, and the reliability of a unit is improved. Meanwhile, the maintenance and running cost is reduced, installation and maintenance are relatively convenient, the service life is longer, and the backmixing-free fluid transfer pump is particularly suitable for transferring high-viscosity fluid.
Description
Technical field
The present invention relates to fluid delivery system, particularly a kind of fluid delivery pump, this fluid delivery pump has the structure eliminating air-teturning mixed phenomenon.
Background technique
Traditional fluid delivery system has centrifugal pump, screw pump and centrifugal blower etc.
Existing fluid delivery pump mostly is centrifugal pump, and centrifugal pump installs composition primarily of parts such as pump case, impeller, axle, bearing, shaft sealing and pump holders, and impeller is arranged in pump case by axle, bearing, and its blade wheel structure can be enclosed or open type.After pump startup, impeller drives high speed rotating by axle, and interlobate fluid also must along with rotation.Under the influence of centrifugal force, fluid is thrown to outer rim from impeller central and is obtained energy, at a high speed to leave impeller outer edge and finally to discharge through discharge port.But, when fluid flows to outer rim by impeller central, certain vacuum is defined in impeller central, fluid is pressed in impeller continuously, constantly be inhaled into and discharge, the segment fluid flow of discharging from impeller outer edge is back to again the import of impeller along the space between impeller and pump case, define air-teturning mixed phenomenon.When transfer of highly viscous, low density flow body medium, this air-teturning mixed phenomenon easily causes inhalation power not enough, and lift reduces, and fluid impact loss also may cause the intensification of rotary component and adjacent component and material.Therefore conventional centrifugal pump is general lower to the transfer efficiency of high viscosity fluid, usually need to improve centrifugal pump, as by medium back flow (CN202418041U), heat, the modes such as dilution (CN203584912U) [2] that adds reduces viscosity, or improving pump efficiency by architecture advances as added screw propulsion (CN201763672U and CN2874087Y), the use multiple vanes also had improves lift (CN102182703A) etc.
Above-mentioned heating, viscosity reducing scheme easily makes high viscosity, low cloud point medium is constantly separated out in cavity, forms one gradually and partly solidifies shape material, seal element is heated up gradually, is out of shape in cavity, and last thoroughly locking, causes mechanical seal to damage; Composite blading, backflow viscosity reduction or dilution viscosity reduction technique etc. not essence solve the back-mixing problem of fluid, and after dilution, fluid may need the concentrated requirement that could meet subsequent technique, increases process costs.
Summary of the invention
For when overcoming back-mixing and the conveying high-viscosity fluid of above-mentioned conventional fluid transfer pump, efficiency sharply descends degradation phenomenon, the object of this invention is to provide a kind of without back-mixing fluid delivery pump, improve efficiency and the reliability of pump, effectively realize the conveying of high viscosity medium, supercharging, and installation and maintenance is easy to operate.
Technological scheme of the present invention is as follows:
A kind of fluid delivery pump, comprise pump case, impeller and pump shaft, pump shaft is positioned at pump case, impeller is arranged on pump shaft, it is characterized in that, gap between impeller inlet and pump case is provided with the sealed letter of block fluid back-mixing, eliminates the air-teturning mixed phenomenon that the fluid section import that is back to impeller along the space between impeller and pump case again of discharging from impeller outer edge is formed.
The sealed letter of described block fluid back-mixing is preferably self-locking seal letter, and it comprises seal ring, expansion loop and spring, and expansion loop props up seal ring by spring under fluid pressure, seal ring and impeller inlet and pump case is adjacent to, jointly plays self-locking seal effect.
The material of above-mentioned seal ring can be metal or nonmetallic, requirement toughness is strong, wear resistance is good, recoverability is good, corrosion-resistant, hardness lower than impeller inlet and pump case material, preferred organic substance material, such as polypropylene, polyethylene, polystyrene, PVC＝polyvinyl chloride, polytetrafluoro material, fiber, nylon, asbestos material, metallo organic material, polyurethane material and resin material etc.
The material normally metal of above-mentioned expansion loop, such as aluminium, aluminum alloy, copper, Cuprum alloy, titanium, titanium alloy, stainless steel, various alloyed steel and rare earth modified metallic material etc.
Fluid delivery pump of the present invention can be used for carrying various fluid, comprises high viscosity fluid and the fluid containing particulate matter, effectively can avoid fluid back mixing.Described high viscosity fluid is such as: edible oil, silicone oil, modified silicon oil, liquid bitumen oil, tung oil tree seed oil, liquid paraffin oil, mineral oil, palm wet goods, and for organic dedusting agent of vapor plume dust collecting process, desulfurizing agent and denitrfying agent etc.
Further, fluid delivery pump of the present invention can be single-suction centrifugal pump, also can be double-suction centrifugal pump.For single-suction centrifugal pump, only need the sealed letter that a block fluid back-mixing is set between unidirectional impeller inlet and pump case; And for double-suction centrifugal pump, between the impeller inlet of both sides and pump case, all need each sealed letter that a block fluid back-mixing is set.
Usually, one end of the pump shaft of fluid delivery pump is supported on the bearing in pump case, and is connected with drive motor, and the other end is cantilever end, and impeller is arranged on cantilever end, is provided with shaft sealing letter between the pump shaft part between impeller and bearing and pump case.Preferably, pump shaft extends by the present invention, and impeller is arranged on the middle part of pump shaft, and the two ends of pump shaft are all by bearings, and two ends are all provided with shaft sealing letter, makes the rotation balance and stability more of impeller.
Preferably, arrange cooling unit at pump case outer wall, raise for the temperature reducing rotary component, the temperature that especially seal friction produces raises.Cooling medium is generally water and/or other freezing mixture, and described cooling unit is provided with import and the outlet of cooling water.
Fluid delivery pump overall structure of the present invention is stablized, and good airproof performance, longer service life, is particularly useful for the conveying of high viscosity fluid.The sealed letter being located at the block fluid back-mixing between impeller inlet and pump case effectively prevent fluid back mixing and power loss, improves the reliability of unit, reduces maintenance operation cost simultaneously, and installation and maintenance operation is also more convenient.The stability of the further enhanced leaktightness effect of the shaft sealing letter acting on main shaft and wheel rotation is respectively equipped with in impeller both sides.
Accompanying drawing explanation
Fig. 1 is the structural representation (sectional drawing) of embodiment 1 without back-mixing fluid delivery pump, wherein: 1 is fluid inlet, 2 is impellers, and 3 is fluid outputs, and 4 is water-cooled housings, 5 is cooling water import/exports, 6 is sealed letters of block fluid back-mixing, and 7 is shaft sealing letters, and 8 is bearings, 9 is pump shafts, and 10 is pump cases.
Embodiment
Describe of the present invention without back-mixing fluid delivery pump below in conjunction with specific embodiment.Described embodiment is to better the present invention is described, and can not be interpreted as it is restriction to claim of the present invention.
As shown in Figure 1, the fluid delivery pump of the present embodiment is single-suction centrifugal pump, pump case 10 is provided with fluid inlet 1, also be provided with fluid output 3, be provided with by the pump shaft 9 of driven by motor in pump case 10, be provided with impeller 2 in the middle part of pump shaft 9, be provided with water-cooled housing 4 at pump case 10 outer wall around pump shaft 9, water-cooled housing 4 is provided with cooling water import/export 5.The two ends of pump shaft 9 are supported on bearing 8, and both sides are equipped with shaft sealing letter 7.Gap location between impeller 2 import and pump case 10 is provided with the sealed letter 6 of block fluid back-mixing.First low density, high viscosity fluid transfer the high-lift of generation by impeller 2 high-speed rotary after fluid inlet 1 enters, and pump fluid from fluid output 3, and the fluid wherein flowing into gap place between impeller inlet and housing 10 is blocked by sealed letter 6, can not cause back-mixing.
Claims (9)
1. a fluid delivery pump, comprise pump case, impeller and pump shaft, pump shaft is positioned at pump case, and impeller is arranged on pump shaft, it is characterized in that, the gap between impeller inlet and pump case is provided with the sealed letter of block fluid back-mixing.
2. fluid delivery pump as claimed in claim 1, it is characterized in that, the sealed letter of described block fluid back-mixing is self-locking seal letter.
3. fluid delivery pump as claimed in claim 2, it is characterized in that, described self-locking seal letter comprises seal ring, expansion loop and spring, and expansion loop props up seal ring by spring under fluid pressure, and seal ring and impeller inlet and pump case are adjacent to.
4. fluid delivery pump as claimed in claim 3, it is characterized in that, described seal ring is metal o-ring or nonmetal seal ring.
5. fluid delivery pump as claimed in claim 4, it is characterized in that, the material of described nonmetal seal ring is organic substance.
6. fluid delivery pump as claimed in claim 3, it is characterized in that, the material of described expansion loop is metal.
7. fluid delivery pump as claimed in claim 1, it is characterized in that, described fluid delivery pump is single-suction centrifugal pump or double-suction centrifugal pump.
8. fluid delivery pump as claimed in claim 1, it is characterized in that, described impeller is arranged on the middle part of pump shaft, and the two ends of pump shaft by bearings, and in impeller both sides, are equipped with shaft sealing letter between pump shaft and pump case.
9. fluid delivery pump as claimed in claim 1, it is characterized in that, the position of along pump shaft, seal arrangement being housed at pump case outer wall is provided with cooling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482751.6A CN105065321A (en) | 2015-08-07 | 2015-08-07 | Backmixing-free fluid transfer pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482751.6A CN105065321A (en) | 2015-08-07 | 2015-08-07 | Backmixing-free fluid transfer pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105065321A true CN105065321A (en) | 2015-11-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510482751.6A Pending CN105065321A (en) | 2015-08-07 | 2015-08-07 | Backmixing-free fluid transfer pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN105065321A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979182A (en) * | 1995-09-12 | 1997-03-25 | Aisin Seiki Co Ltd | Foreign matter infiltration preventive mechanism to mechanical seal part of water pump |
| DE29704389U1 (en) * | 1997-03-11 | 1997-05-07 | Burgmann Dichtungswerk Feodor | Leakage return arrangement in a sealing device |
| CN201155484Y (en) * | 2007-12-21 | 2008-11-26 | 锦州市劲弓泵业有限责任公司 | Centrifugal-pump impeller and port ring seal device |
| CN204357778U (en) * | 2014-12-29 | 2015-05-27 | 利欧集团股份有限公司 | Water inlet mouth ring sealing structure |
| CN204828016U (en) * | 2015-08-07 | 2015-12-02 | 江西永丰县博源实业有限公司 | Fluid transportation pump |
-
2015
- 2015-08-07 CN CN201510482751.6A patent/CN105065321A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979182A (en) * | 1995-09-12 | 1997-03-25 | Aisin Seiki Co Ltd | Foreign matter infiltration preventive mechanism to mechanical seal part of water pump |
| DE29704389U1 (en) * | 1997-03-11 | 1997-05-07 | Burgmann Dichtungswerk Feodor | Leakage return arrangement in a sealing device |
| CN201155484Y (en) * | 2007-12-21 | 2008-11-26 | 锦州市劲弓泵业有限责任公司 | Centrifugal-pump impeller and port ring seal device |
| CN204357778U (en) * | 2014-12-29 | 2015-05-27 | 利欧集团股份有限公司 | Water inlet mouth ring sealing structure |
| CN204828016U (en) * | 2015-08-07 | 2015-12-02 | 江西永丰县博源实业有限公司 | Fluid transportation pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 331500 Yongfeng Industrial Park, Jiangxi, Ji'an Applicant after: Jiangxi Yongfeng Boyuan Industrial Co. Ltd. Address before: 331500 Yongfeng Industrial Park, Jiangxi, Ji'an Applicant before: Jiangxi Yongfeng Boyuan Industrial Co., Ltd. |
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| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |