CN2828397Y - Back suction centrifugal pump - Google Patents
Back suction centrifugal pump Download PDFInfo
- Publication number
- CN2828397Y CN2828397Y CN 200520076531 CN200520076531U CN2828397Y CN 2828397 Y CN2828397 Y CN 2828397Y CN 200520076531 CN200520076531 CN 200520076531 CN 200520076531 U CN200520076531 U CN 200520076531U CN 2828397 Y CN2828397 Y CN 2828397Y
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- CN
- China
- Prior art keywords
- bearing
- centrifugal pump
- pump
- ball bearing
- rear suction
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to an improvement of a centrifugal pump. The utility model is characterized in that a bearing of a rotary shaft near a motor end is a plane bearing and a ball bearing which are combined in parallel. The utility model effectively overcomes the damage of bearings caused by the axial thrust of a rear suction centrifugal pump, eliminates the radial jump of the rotary shaft and simultaneously protects a shaft seal, and thus, the bearings and the shaft seal of a rear suction pump have long service life. The service life of bearings of double stage rear suction pumps can reach more than 6 moths at least. The structure of the utility model can be used in various rear suction pumps, particularly rear suction pumps in the stage of more than two.
Description
Technical field
Model utility is about the improvement to centrifugal pump, relates in particular to a kind ofly can effectively offset the destruction of axial force to bearing, the back sucking centrifugal pump that prolongs bearing and shaft sealing working life.
Background technique
Centrifugal pump is the end thrust of balance impeller generation in the course of the work, and the hydrodynamic pressure that reduces to seal the position, at the running wheel back side back impeller is set usually.Yet back impeller exists, and causes air horsepower consumption to increase, and electric energy about 15-20% approximately increases consumption; Secondly, impeller rotation back impeller exists can produce eddy current, can aggravate the wearing and tearing to pump case.People make shaft sealing and Pump Suction Nozzle be in position in the same way by suction port is moved between volute and the bearing support, thereby make shaft seal be in the fluid negative-pressure zone, to omit back impeller.Yet back suction formula pump omits back impeller, the axial force that impeller produces makes bearing pressure is increased, especially for secondary or above back sucking pump, its axially back thrust will be multiplied, thereby cause the damage of bearing, shorten bearing working life, plain ball bearing, usually can only use about hundred hours, change angle contacting one direction thrust bearing and taper roller bearing, also can only use about two weeks usually.Yet angular contact bearing and taper roller bearing exist circular runout big again, when the pump machine moves, have strengthened the circular runout of pump main shaft, thereby main shaft operation coaxality is poor, can cause the infringement to shaft sealing again.Can keep than the long life though change plane bearing, plane bearing only can bear axial force, can not bearing radial force, can cause the main shaft circular runout equally, and cause damage to shaft sealing.
Summary of the invention
The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of and neither back impeller need be set, and can better alleviate the infringement to bearing simultaneously again, guarantees the back sucking centrifugal pump that bearing and shaft sealing are without prejudice.
The model utility purpose realizes that main the improvement is to make back suction formula pump by the motor side bearing, adopts plane bearing and ball bearing combination bearing arranged side by side, keep out end thrust with plane bearing, the ball bearing bearing radial force does not make the pump shaft circular runout, thereby realizes the object of the invention.Specifically, sucking centrifugal pump after the model utility comprises pump shaft and block bearing, it is characterized in that by plane bearing and the ball bearing of motor side bearing for combination side by side.
For helping the installation of pump, plane bearing and ball bearing better adopt the Assembly structure, and being provided with gasket ring therebetween, the main effect of gasket ring is that axial force is passed to outer ring or the inner ring or the bearing side cover of ball bearing by this gasket ring, forms reverse pushing tow balance.
This external gasket ring axially (thickness direction) is processed with some through holes, is made for two bearings cooling, lubricant passageway; Circle or cylindrical have interior conocave plane in the gasket ring planar radial, so that the gasket ring face only contact with the interior or outer ring of ball bearing, and omit other gasket rings, the simplification parts.
Model utility is owing to change back sucking centrifugal pump into plane bearing and ball bearing composite structure arranged side by side by the motor side bearing; both effectively overcome back sucking centrifugal pump shaft to the damage of thrust to bearing; eliminated simultaneously the circular runout of rotating shaft again; protected shaft sealing; thereby the bearing and the shaft sealing of back sucking pump were all had than the long life; through comparative trial, the sucking pump bearing can reach more than 6 months working life at least behind the twin-stage.The model utility said structure can be used for the above back suction of various back suction formula pump, especially secondarys formula pump.
Below in conjunction with two embodiments, further specify model utility.
Description of drawings
Fig. 1 is a model utility basic structure schematic representation.
Fig. 2 is model utility first embodiment's combined bearing structure schematic representation.
Fig. 3 is model utility second embodiment's combined bearing structure schematic representation.
Fig. 4 is a gasket ring structural representation between embodiment's plane bearing and ball bearing.
Fig. 5 is Fig. 4 plan structure schematic representation.
Embodiment
Embodiment 1: referring to Fig. 1,2,4,5, back sucking centrifugal pump 1 bearing support 2 is made up by front (towards pump chamber) planar axes 4, middle gasket ring 5 and back ball bearing 3 side by side by the motor side bearing.Gasket ring 5 between two bearings, and side face has some lubricated, cold oil through holes 6, and wherein circle has indent anchor ring 9 in the one side, thereby guarantee that gasket ring only contacts the transmission axial force with the ball bearing outer ring.The ball bearing rear side is a bearing cover 8, and axis hole is by oil sealing 7 sealings.End thrust passes to plane bearing (embodiment is for relying on step between rotating shaft and plane bearing) by rotating shaft like this, passes to the ball bearing outer ring by gasket ring again, passes to bearing cover by the ball bearing outer ring, thereby makes the rotating shaft axial force obtain to support.
Embodiment 2: referring to Fig. 3, as embodiment 1, side by side combination bearing be ball bearing 3 preceding, plane bearing 4 is contacting with the ball bearing inner ring in the back, gasket ring 5 is between plane bearing and bearing cover.
In addition, can also gasket ring 5 be arranged between ball bearing and plane bearing as embodiment 1; And the pad cylindrical interior conocave plane is arranged, contact with the ball bearing inner ring transmission thrust; Or cushion block in the middle of omitting, two bearings is contacted as previously mentioned.
Claims (4)
1, back sucking centrifugal pump comprises pump shaft and block bearing, it is characterized in that by plane bearing and the ball bearing of motor side bearing for combination side by side.
2, according to the described back of claim 1 sucking centrifugal pump, it is characterized in that having between said plane bearing and ball bearing with ball bearing in or the gasket ring that contacts of outer ring.
3, according to the described back of claim 2 sucking centrifugal pump, it is characterized in that on the said gasket ring face axial hole being arranged.
4,, it is characterized in that interior circle of said gasket ring planar radial or cylindrical have interior conocave plane according to claim 2 or 3 described back sucking centrifugal pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076531 CN2828397Y (en) | 2005-10-17 | 2005-10-17 | Back suction centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076531 CN2828397Y (en) | 2005-10-17 | 2005-10-17 | Back suction centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2828397Y true CN2828397Y (en) | 2006-10-18 |
Family
ID=37079953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520076531 Expired - Lifetime CN2828397Y (en) | 2005-10-17 | 2005-10-17 | Back suction centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2828397Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500774A (en) * | 2011-12-26 | 2012-06-20 | 东北大学 | Triple gear plate positioning structure for numerical control knife rest |
| CN103122873A (en) * | 2013-01-22 | 2013-05-29 | 宜兴市宙斯泵业有限公司 | Improved posterior-suction type anticorrosive pump |
| CN110307717A (en) * | 2019-05-13 | 2019-10-08 | 浙江骐骥环境科技有限公司 | A kind of efficient sealed rotary kiln |
-
2005
- 2005-10-17 CN CN 200520076531 patent/CN2828397Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500774A (en) * | 2011-12-26 | 2012-06-20 | 东北大学 | Triple gear plate positioning structure for numerical control knife rest |
| CN103122873A (en) * | 2013-01-22 | 2013-05-29 | 宜兴市宙斯泵业有限公司 | Improved posterior-suction type anticorrosive pump |
| CN103122873B (en) * | 2013-01-22 | 2015-10-28 | 宜兴市宙斯泵业有限公司 | A kind of rear suction type corrosion protection pump of improvement |
| CN110307717A (en) * | 2019-05-13 | 2019-10-08 | 浙江骐骥环境科技有限公司 | A kind of efficient sealed rotary kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061018 |
|
| EXPY | Termination of patent right or utility model |