CN101968064A - Anti-cavitation centrifugal pump - Google Patents
Anti-cavitation centrifugal pump Download PDFInfo
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- CN101968064A CN101968064A CN 201010547729 CN201010547729A CN101968064A CN 101968064 A CN101968064 A CN 101968064A CN 201010547729 CN201010547729 CN 201010547729 CN 201010547729 A CN201010547729 A CN 201010547729A CN 101968064 A CN101968064 A CN 101968064A
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Abstract
The invention discloses an anti-cavitation centrifugal pump comprising a pump shell, an impeller and an injecting device, wherein the pump shell is provided with a pump inlet and a pump outlet; the impeller comprises an impeller inlet and an impeller outlet; the injecting device comprises an injecting pipe and a spray nozzle, wherein a liquid inlet of the injecting pipe is communicated with an outlet of the impeller; and the spray nozzle just faces to a low-pressure area of the impeller inlet and is communicated with a liquid outlet of the injecting pipe. In the invention, a small amount of high-pressure water is led back to the impeller inlet, and injected the high-pressure water just facing to the low-pressure area of the impeller inlet through the spray nozzle, the pressure of a high-pressure area and the low-pressure area is enhanced by utilizing smaller fluid amount, the pressure intensity of the low-pressure area of the impeller inlet of the centrifugal pump is effectively increased and the centrifugal pump is prevented from generating cavitation, thereby the vibration and the noise and property reduction of the centrifugal pump and the damage of flow passage components, caused by the cavitation, can be avoided; the invention has small utilization amount of high-pressure liquid by pointedly injecting high-pressure and high-flow liquid and rarely influences the liquid striking amount and the efficiency of the centrifugal pump, thereby ensuring that the centrifugal pump can normally operate; and in addition, the invention has the advantage of using and maintaining cost saving.
Description
Technical field
The present invention relates to a kind of liquid transmitting power equipment, particularly a kind of centrifugal pump.
Background technique
Centrifugal pump is widely used in chemical industry, the energy and life or industrial field fed sheet of a media such as plumbing because convection cell character and installation precision are less demanding, particularly in the occasion with big traffic requirement, has irreplaceable effect.
Centrifugal pump is by action of centrifugal force liquid to be thrown away, when the impeller quick rotation, blade impels the very fast rotation of water, the water that is rotating flies to from impeller under action of centrifugal force, after water in the pump was dished out, the core of impeller formed vacuum area, and liquid has been pressed onto in the intake pipe by pipe network under the effect of atmospheric pressure (or hydraulic pressure), form circulation, realize carrying continuously the purpose of liquid.Under the liquid condition that flow at high speed and water temperature raise in pump; the vaporization of low pressure place forms the hole in impeller; the hole is crushed and is produced surge pressure in the zone of high pressure; destroy the protective film on the metal surface; and rate of corrosion is accelerated; form many tiny pits at blade surface, be expanded into the cave then gradually.Cavitation can make centrifugal pump produce vibration and noise, reduces pump performance, and flow, lift and the efficient of pump are obviously descended; Destroy near the impeller outlet and the flow passage components of discharge opeing chamber import; Can cause perforation of blade or front and rear cover plate even impeller to break when serious, lead to serious accident.
In the prior art, be used for centrifugal pump and prevent that the method and structure of cavitation is more,, still all need change existing structure, make and install comparatively complicated such as reducing suction head, adopt double-entry impeller and adopting the inducer structure; Adopting backflow to be added to mouth pressure also is one of method of using in the practice, but highly pressurised liquid is introduced into behind the inlet and inlet fluid is mixed in one, causes the liquid measure of beating of pump to reduce inefficiency.
Therefore, need a kind of centrifugal pump that can solve the cavitation influence, avoid the generation of cavitation phenomenons, thereby avoid because centrifugal pump vibration and noise, the reduction of performance and the destruction of flow passage components that cavitation causes; Thereby guarantee that centrifugal pump can normally move, save use, maintenance cost.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of anti-cavitation centrifugal pump, avoid the generation of cavitation phenomenons, thereby avoid because centrifugal pump vibration and noise, the reduction of performance and the destruction of flow passage components that cavitation phenomenons causes; Thereby guarantee that centrifugal pump can normally move, save use, maintenance cost.
Anti-cavitation centrifugal pump of the present invention, comprise pump case and impeller, described pump case is provided with pump inlet and pump discharge, impeller comprises impeller inlet and impeller outlet, also comprise lead-jetting device, described lead-jetting device comprises induction tunnel and nozzle, and described induction tunnel liquid entering hole is communicated in impeller outlet, and nozzle is communicated with the induction tunnel liquid outlet over against the impeller inlet low pressure area.
Further, described nozzle forms nozzle sets at least 3 rounded distributions, and distribution radius is less than impeller inlet;
Further, described induction tunnel liquid entering hole is communicated in impeller outlet by pump discharge, and induction tunnel passes pump intake and is communicated with nozzle sets;
Further, the outward-dipping setting of the nozzle of described nozzle sets makes injection stream liquid over against the impeller inlet low pressure area.
Beneficial effect of the present invention: anti-cavitation centrifugal pump of the present invention, setting is communicated in the lead-jetting device of impeller outlet and inlet, with high pressure water draw get back to impeller eye on a small quantity and by nozzle over against impeller eye low pressure area injection, utilize less Fluid Volume to improve low pressure area pressure targetedly and protect impeller to cross and be passed to the top layer, effectively improve the pressure of centrifugal pump impeller eye low pressure area, make it to be not less than or the less saturated pressure that is lower than the fluid temperature correspondence of carrying, avoid pump generation cavitation, thereby avoid because centrifugal pump vibration and the noise that cavitation phenomenons causes, the reduction of performance and the destruction of flow passage components; Owing to utilize high pressure and high flow rate liquid to spray targetedly, the highly pressurised liquid utilization is few, to pump beat liquid measure and effectiveness affects is very little, the drawback of the efficient of the method affect pump of change available technology adopting backflow prevention cavitation, thereby guarantee that centrifugal pump can normally move, save use, maintenance cost.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a lead-jetting device nozzle distribution schematic diagram.
Embodiment
Fig. 1 is a structural representation of the present invention, Fig. 2 is a lead-jetting device nozzle distribution schematic diagram, as shown in the figure: the anti-cavitation centrifugal pump of present embodiment, comprise pump case 1 and impeller 2, described pump case 1 is provided with pump inlet 1a and pump discharge 1b, and impeller 2 comprises impeller inlet 2a and impeller outlet 2b, also comprise lead-jetting device, described lead-jetting device comprises induction tunnel 3 and nozzle 4a, and described induction tunnel 3 liquid entering holes are communicated in impeller outlet 2b, and nozzle 4a is communicated with induction tunnel 3 liquid outlets over against impeller inlet 2a low pressure area; Impeller inlet 2a low pressure area is the specific zone of impeller, is meant impeller minimum position of pressure when imbibition, and after impeller shape and structure were determined, this zone was a fixed area.
Present embodiment, described nozzle 4a forms nozzle sets 4 at least 3 rounded distributions, and distribution radius is less than impeller inlet 2a; According to the size of impeller radius, nozzle 4a reasonable quantity increases; This structure nozzle 4a distributes and impeller inlet 2a shape adapts, and the low pressure area of the inlet of impeller 2 each flow channels is all sprayed, and is beneficial to make highly pressurised liquid spray the low pressure area in impeller inlet 2a rapidly and uniformly.
Present embodiment, described induction tunnel 3 liquid entering holes are communicated in impeller outlet 2b by pump discharge 1b, and induction tunnel 3 passes pump intake 1a and is communicated with nozzle sets 4; Simple in structure, easy installation and removal mustn't destroy original centrifugal pump structure, is beneficial to rebuilding old equipment and uses.
Present embodiment, the outward-dipping setting of nozzle 4a of described nozzle sets 4 make nozzle 4a jet liquid over against impeller inlet 2a low pressure area; The nozzle 4a of nozzle sets 4 is outward-dipping be meant outward-dipping with respect to nozzle sets 4 center lines, this structure is beneficial to the manufacturing of lead-jetting device and the installation in pump, be beneficial to nozzle over against low pressure area, pointed raising low pressure area pressure effectively prevents the generation of cavitation.
Explanation is at last, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technological scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. anti-cavitation centrifugal pump, comprise pump case and impeller, described pump case is provided with pump inlet and pump discharge, impeller comprises impeller inlet and impeller outlet, it is characterized in that: also comprise lead-jetting device, described lead-jetting device comprises induction tunnel and nozzle, and described induction tunnel liquid entering hole is communicated in impeller outlet, and nozzle is communicated with the induction tunnel liquid outlet over against the impeller inlet low pressure area.
2. anti-cavitation centrifugal pump according to claim 1 is characterized in that: described nozzle forms nozzle sets at least 3 rounded distributions, and distribution radius is less than impeller inlet.
3. anti-cavitation centrifugal pump according to claim 2 is characterized in that: described induction tunnel liquid entering hole is communicated in impeller outlet by pump discharge, and induction tunnel passes pump intake and is communicated with nozzle sets.
4. according to claim 2 or 3 described anti-cavitation centrifugal pumps, it is characterized in that: the outward-dipping setting of the nozzle of described nozzle sets makes injection stream liquid over against the impeller inlet low pressure area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010547729 CN101968064A (en) | 2010-11-17 | 2010-11-17 | Anti-cavitation centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010547729 CN101968064A (en) | 2010-11-17 | 2010-11-17 | Anti-cavitation centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN101968064A true CN101968064A (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010547729 Pending CN101968064A (en) | 2010-11-17 | 2010-11-17 | Anti-cavitation centrifugal pump |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207091A (en) * | 2011-06-07 | 2011-10-05 | 张意立 | High-concentration centrifugal pulp pump capable of spraying water on inner and outer corners |
| CN103016396A (en) * | 2012-12-11 | 2013-04-03 | 江苏大学 | Centrifugal pump hydraulic design method controlling maximum flow by cavitation |
| CN105090045A (en) * | 2014-12-02 | 2015-11-25 | 芜湖三峰节能设备有限公司 | Centrifugal pump with industrial mechanical seal |
| CN105090044A (en) * | 2014-11-21 | 2015-11-25 | 衢州学院 | Centrifugal pump |
| CN105508307A (en) * | 2016-01-06 | 2016-04-20 | 中国计量学院 | Anti-cavitation vortex pump |
| CN105781955A (en) * | 2016-05-23 | 2016-07-20 | 肥西县鑫山机械厂 | Centrifugal pump with industrial mechanical seal |
| CN106286415A (en) * | 2016-10-21 | 2017-01-04 | 杭州激湍流体科技有限公司 | The peripheral pump of anti-generation noise |
| CN109404294A (en) * | 2018-11-20 | 2019-03-01 | 衢州学院 | A kind of novel motor unit contruction pump |
| CN110578694A (en) * | 2019-08-27 | 2019-12-17 | 浙江理工大学 | Assembled high-speed low-temperature centrifugal pump |
| CN113915144A (en) * | 2021-09-17 | 2022-01-11 | 湖南精工特泵有限公司 | Condensation pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499612Y (en) * | 2001-10-19 | 2002-07-10 | 北京中投洁天节能环保科技有限公司 | Anti-cavitation device for centrifugal pump |
| CN1740574A (en) * | 2005-08-19 | 2006-03-01 | 浙江大学 | Ejector capable of raising the cavitation performance of centrifugal pump |
| CN1752464A (en) * | 2005-08-04 | 2006-03-29 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater desalination auxiliary device for preventing centrifugal pump from cavitation and vacuum forming |
| CN1904390A (en) * | 2006-08-18 | 2007-01-31 | 武善东 | Method of enhancing suction range and flow and preventing corrosion for centrifugal pump and its device |
-
2010
- 2010-11-17 CN CN 201010547729 patent/CN101968064A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499612Y (en) * | 2001-10-19 | 2002-07-10 | 北京中投洁天节能环保科技有限公司 | Anti-cavitation device for centrifugal pump |
| CN1752464A (en) * | 2005-08-04 | 2006-03-29 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater desalination auxiliary device for preventing centrifugal pump from cavitation and vacuum forming |
| CN1740574A (en) * | 2005-08-19 | 2006-03-01 | 浙江大学 | Ejector capable of raising the cavitation performance of centrifugal pump |
| CN1904390A (en) * | 2006-08-18 | 2007-01-31 | 武善东 | Method of enhancing suction range and flow and preventing corrosion for centrifugal pump and its device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207091B (en) * | 2011-06-07 | 2012-12-12 | 张意立 | High-concentration centrifugal pulp pump capable of spraying water on inner and outer corners |
| CN102207091A (en) * | 2011-06-07 | 2011-10-05 | 张意立 | High-concentration centrifugal pulp pump capable of spraying water on inner and outer corners |
| CN103016396A (en) * | 2012-12-11 | 2013-04-03 | 江苏大学 | Centrifugal pump hydraulic design method controlling maximum flow by cavitation |
| CN105090044B (en) * | 2014-11-21 | 2017-07-14 | 衢州学院 | Centrifugal pump |
| CN105090044A (en) * | 2014-11-21 | 2015-11-25 | 衢州学院 | Centrifugal pump |
| CN105090045A (en) * | 2014-12-02 | 2015-11-25 | 芜湖三峰节能设备有限公司 | Centrifugal pump with industrial mechanical seal |
| CN105508307A (en) * | 2016-01-06 | 2016-04-20 | 中国计量学院 | Anti-cavitation vortex pump |
| CN105781955A (en) * | 2016-05-23 | 2016-07-20 | 肥西县鑫山机械厂 | Centrifugal pump with industrial mechanical seal |
| CN106286415A (en) * | 2016-10-21 | 2017-01-04 | 杭州激湍流体科技有限公司 | The peripheral pump of anti-generation noise |
| CN109404294A (en) * | 2018-11-20 | 2019-03-01 | 衢州学院 | A kind of novel motor unit contruction pump |
| CN109404294B (en) * | 2018-11-20 | 2024-03-01 | 衢州学院 | Motor direct-connection pump |
| CN110578694A (en) * | 2019-08-27 | 2019-12-17 | 浙江理工大学 | Assembled high-speed low-temperature centrifugal pump |
| CN113915144A (en) * | 2021-09-17 | 2022-01-11 | 湖南精工特泵有限公司 | Condensation pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Chuan Inventor after: Zhang Rongjin Inventor after: Long Tianyu Inventor after: Xu Hao Inventor after: Gao Yuanyuan Inventor after: Li Shaohua Inventor after: He Dan Inventor after: Shi Wen Inventor after: Deng Bowen Inventor after: Tu Jiali Inventor before: He Chuan Inventor before: Long Tianyu Inventor before: Xu Hao Inventor before: Li Shaohua Inventor before: He Dan Inventor before: Shi Wen |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HE CHUAN LONG TIANYU XU HAO LI SHAOHUA HE DAN SHI WEN TO: HE CHUAN LONG TIANYU XU HAO GAO YUANYUAN LI SHAOHUA HE DAN SHI WEN DENG BOWEN TU JIALI ZHANG RONGJIN |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20110209 |