CN203892242U - Side-suction centrifugal pump - Google Patents
Side-suction centrifugal pump Download PDFInfo
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- CN203892242U CN203892242U CN201420235715.0U CN201420235715U CN203892242U CN 203892242 U CN203892242 U CN 203892242U CN 201420235715 U CN201420235715 U CN 201420235715U CN 203892242 U CN203892242 U CN 203892242U
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- suction port
- pump
- sealing
- centrifugal pump
- pressure reducing
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Abstract
The utility model relates to the field of mechanical industry, in particular to a side-suction centrifugal pump which comprises a pump shell, a pump cover, an impeller of a pump shell inner cavity, an impeller spindle and a suction port tee joint arranged on the side wall of the pump shell. The impeller shaft is connected with a shaft sleeve in a sleeved manner, a spindle is in shaft sealing with an end face of the suction port tee joint through a lip-shaped seal with a sealing box, a depressurizing disc is arranged on the impeller shaft corresponding to a suction port of the suction port tee joint in a sleeved manner, and protruding radial spokes are arranged on the surface, directly facing the sealing box, of the depressurizing disc. Through improving, pressure of fluid at a pump shaft sealing position is lowered, service life of a shaft seal is prolonged, and sealing life is longer 5-6 times than the prior art.
Description
Technical field
The utility model relates to machinery industry field, relates in particular to the shaft sealing of side draught type centrifugal pump.
Background technique
The filtration of chemical industry, smelting, environmental protection sewage sludge waste slag, needs, with pump, slurry is injected to plate and frame filter press processing and filters, and in feeding, pressure filtration process, be feeding packing stage early stage, and the later stage is for forcing the press filtration stage.Forcing the press filtration stage, delivery side of pump pressure generally reaches 0.8MPa, filtering effect that could be effectively good.But Ordinary Centrifugal Pumps is when forcing pressure, and when pump discharge reaches 0.8MPa, the hydrodynamic pressure in pump cavity also increases, the pressure at shaft sealing position is also raise simultaneously.In the case, no matter shaft sealing is mechanical seal or lip seal with elastometic washer, all very easily damages.When therefore conventional front suction type (suction port is at the front end of pump) shurry pump adapted press filtration is pressurizeed, sealing life is extremely short, and what have only had about a week.In order to improve the working life of domestic pressure filter adapted pump, the utility model people once improved with a kind of side draught type of model utility pressure filter feeding pump and (saw patent
200420079876.1).
As Fig. 1, the main points of this model utility are a centrifugal pump suction port 1.1, be placed in shaft sealing 2 positions of pump side face, make like this sealing of pump main shaft all the time in a relative fluid depression, when pump work, even if pump discharge reaches the pressure of 1MPa, the pressure of pump intake fluid can not raise yet.Therefore, significantly promoted the shaft sealing life-span of this pump, can have been risen to 60 ~ 90 days from 6 ~ 15 days the working life of original technology pump.
But above technology can't meet the demand of some special post operating modes, for example, Pump Suction Nozzle storage tank liquid level is higher than 3 meters of above posies of Pump Suction Nozzle, because pump is when forcing pressure work, because the required flow of pressure filter declines, cause pump discharge flow to be less than inlet flow rate, and then make the hydrodynamic pressure at shaft sealing position identical with the liquid level height of sump liquid.Generally can reach the pressure of 0.03 ~ 0.08MPa, under this pressure, the life-span of the lip seal with elastometic washer of side suction pump adapted is greatly affected, and adds the erosive wear of carrying silt particle in slip, and the shaft sealing life-span generally only had about 20 days.Still can not meet market user's demand, still have the space of improvement.
Summary of the invention
The utility model, for the deficiencies in the prior art, provides a kind of effective reduction hydrodynamic pressure, the side draught type centrifugal pump that sealing life is long.
For realizing the utility model object, provide following technological scheme: a kind of side draught type centrifugal pump, comprise impeller, the impeller spindle of pump case, pump cover, pump case inner chamber and the suction port threeway that pump case sidewall is set, described impeller spindle is socketed with axle sleeve, main shaft seals by the lip seal with sealing case and suction port threeway one end over glaze, it is characterized in that being arranged with pressure reducing disc on the impeller spindle at suction port place of corresponding suction port threeway.
As preferably, pressure reducing disc is provided with the radial spoke of projection over against the surface of sealing case.
As preferably, described pressure reducing disc outer circumferential face is placed on sealing case correspondence and offers in inner groovy.Effect of easing stress to sealing while rotating in order to promote pressure reducing disc, can be arranged on pressure reducing disc in the pit after sealing case.During work, pressure reducing disc rotation produces centrifugal force, makes fluid between pressure reducing disc and pit, produce a pendular ring, plays the effect of block fluid pressure, effectively the life-span of extending shaft sealing.
As preferably, described axle sleeve is set to two sections of left and right, and pressure reducing disc is positioned between left and right bushing fixing.
Operational efficiency for elevator pump, make the smooth and easy inflow pump active chamber of liquid energy of suction port, in flow process, produce less eddy current, and then produce invalid acting, reduce suction port fluid to directly the washing away of pressure reducing disc, the suction port internal surface of method pressure reducing disc top is provided with the water conservancy diversion inclined-plane of inclination preferably simultaneously.
As preferably, shaft sealing is provided with external cooling water washing system outward.
Working principle of the present utility model is: during pump operation, pressure reducing disc rotates with main shaft, produce the effect of decompression, when the hydrodynamic pressure of side draught pump intake is at 0.03 ~ 0.08MPa in the situation that, the fluid pressure energy at shaft sealing lip circle position is controlled under the pressure of 0 ~ 0.02MPa, has effectively guaranteed the operational reliability of sealing.Use this technology, be greater than under the operating mode of 0.03MPa at Pump Suction Nozzle hydrodynamic pressure, the life-span of sealing can rise to 90 days from 15 days, and the life-span can promote 5 ~ 6 times.
The beneficial effects of the utility model: 1. by improvement, reduced the pressure of shaft seal position fluid, extended the life-span of shaft sealing, than long 5 ~ 6 times of the sealing life of original technology.2. extended user's the product use and maintenance cycle, from 15 ~ 20 days, extended to 80 ~ 90 days, saved human cost and maintenance cost, made user's production more normal.
3. the environmental-protecting performance of elevator pump, because grown sealing life, has leaked less, and environment is also clean, effectively improves user's use running environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the A-A sectional view of Fig. 2.
Embodiment
Embodiment 1: a kind of side draught type centrifugal pump, comprise impeller 003, the impeller spindle 004 of pump case 001, pump cover 002, pump case 001 inner chamber and the suction port threeway 005 that pump case 001 sidewall is set, described impeller spindle 004 is socketed with axle sleeve 006, main shaft 004 seals with suction port threeway 005 one end over glaze by the lip seal 007 with sealing case 071, on the impeller spindle 004 at suction port 051 place of corresponding suction port threeway 005, be arranged with pressure reducing disc 008, pressure reducing disc 008 is provided with the radial spoke 081 of projection over against the surface of sealing case 071.Described pressure reducing disc 008 outer circumferential face is placed on sealing case 071 correspondence and offers in inner groovy 072.Described axle sleeve 006 is set to two sections of left and right, and it is fixing that pressure reducing disc 008 is positioned at 006 of left and right bushing.Suction port 051 internal surface of pressure reducing disc 008 top is provided with the water conservancy diversion inclined-plane 052 of inclination.Shaft sealing is provided with external cooling water washing system 009 outward.
Claims (6)
1. a side draught type centrifugal pump, comprise impeller, the impeller spindle of pump case, pump cover, pump case inner chamber and the suction port threeway that pump case sidewall is set, described impeller spindle is socketed with axle sleeve, main shaft seals by the lip seal with sealing case and suction port threeway one end over glaze, it is characterized in that being arranged with pressure reducing disc on the impeller spindle at suction port place of corresponding suction port threeway.
2. a kind of side draught type centrifugal pump according to claim 1, is characterized in that described pressure reducing disc is provided with the radial spoke of projection over against the surface of sealing case.
3. a kind of side draught type centrifugal pump according to claim 1, is characterized in that described pressure reducing disc outer circumferential face is placed on sealing case correspondence and offers in inner groovy.
4. a kind of side draught type centrifugal pump according to claim 1, is characterized in that described axle sleeve is set to two sections of left and right, and pressure reducing disc is positioned between left and right bushing fixing.
5. a kind of side draught type centrifugal pump according to claim 1, is characterized in that the suction port internal surface of pressure reducing disc top is provided with the water conservancy diversion inclined-plane of inclination.
6. a kind of side draught type centrifugal pump according to claim 1, is characterized in that shaft sealing is provided with external cooling water washing system outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235715.0U CN203892242U (en) | 2014-05-09 | 2014-05-09 | Side-suction centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235715.0U CN203892242U (en) | 2014-05-09 | 2014-05-09 | Side-suction centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892242U true CN203892242U (en) | 2014-10-22 |
Family
ID=51718653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235715.0U Active CN203892242U (en) | 2014-05-09 | 2014-05-09 | Side-suction centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402014A (en) * | 2016-10-24 | 2017-02-15 | 宜兴市宙斯泵业有限公司 | Side-suction anti-abrasion centrifugal pump |
| CN106640669A (en) * | 2016-10-24 | 2017-05-10 | 宜兴市宙斯泵业有限公司 | Centrifugal slurry pump |
-
2014
- 2014-05-09 CN CN201420235715.0U patent/CN203892242U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402014A (en) * | 2016-10-24 | 2017-02-15 | 宜兴市宙斯泵业有限公司 | Side-suction anti-abrasion centrifugal pump |
| CN106640669A (en) * | 2016-10-24 | 2017-05-10 | 宜兴市宙斯泵业有限公司 | Centrifugal slurry pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |