CN1065799C - Method for producing small open end blade of centrifugal pump - Google Patents
Method for producing small open end blade of centrifugal pump Download PDFInfo
- Publication number
- CN1065799C CN1065799C CN95110254A CN95110254A CN1065799C CN 1065799 C CN1065799 C CN 1065799C CN 95110254 A CN95110254 A CN 95110254A CN 95110254 A CN95110254 A CN 95110254A CN 1065799 C CN1065799 C CN 1065799C
- Authority
- CN
- China
- Prior art keywords
- impeller
- centrifugal pump
- open end
- blade
- small open
- 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 - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a method for manufacturing a centrifugal pump impeller. A casting impeller blank of large opening dimension is manufactured by common casting technology is processed by pressure, a blade can generate plastic deformation, and a needed impeller of small opening dimension, which can not be produced before, can be achieved. The present invention is suitable for producing impellers with the opening dimension of 5 to 1mm. The present invention has the characteristics of low production cost and high efficiency.
Description
The present invention is the manufacture method of small open end blade of centrifugal pump.The centrifugal pump impeller that existing metal is made generally is to adopt cast blank, makes through machining.The shape of impeller blank is two circular cover in front and back, a single-casting of being made up of crooked shape blade connection between the cover plate.Distance between two cover plates is called the impeller opening size, when the opening size of impeller hour, the pump usage of trade claims small open end blade.
The impeller opening size is more little, and the casting of impeller blank is just difficult more.Be subjected to the restriction of conventional casting, when the impeller opening size equals 3mm, just can not cast out qualified product.Therefore being cast in of small open end blade all is difficult problems both at home and abroad.For this reason, Japan adopts the ceramic core casting, but because of equipment and raw material are more expensive, cost than general casting technique Senior Two doubly more than.The former Soviet Union adopts quartzy core casting, but because of complex process, apparatus expensive, cost is than general casting Senior Three doubly.
China once adopted cover plate and blade was linked together the production small open end blade with the method for spot welding or riveted joint.Cost exceeds more than 6 times than casting.And exist the slit between blade and the cover plate, produce crevice corrosion during pump work, influence pump performance and life-span.The drilling method is adopted in the impeller manufacturing of MPH type " low discharge chemical industry centrifugal pump ", and its impeller channel is with cylindrical straight boring, replaces the little opening casting of crooked shape runner.And produce low-capacity pump.Win national major technologies and equipment prize of the achievement for this reason.This method production efficiency is low, also is unsuitable for producing in enormous quantities.
The objective of the invention is, with lower cost, higher efficient is made the ductile metal small open end blade of centrifugal pump.
Technical solution of the present invention is to make opening size behind the impeller of 5～15mm with casting technique, uses pressure processing method again, makes blade produce plastic deformation and reaches needed opening size and shape.
Because adopt the cast blank of big opening size, the simple cost of casting technique is low, the pressure processing operation of increase, the production efficiency height is so totle drilling cost is low.
And the small open end blade that produces only exists on the blade height and is out of shape, and the curvature of blade is constant.Again because blade produces plastic deformation, the tissue density of having improved blade.Thereby improved the decay resistance of impeller, prolonged impeller life.
Describe the present invention below in conjunction with accompanying drawing:
Fig. 1 is the cutaway view of pressure processing operation of the present invention.In Fig. 1, the impeller cast blank 1.2 of big opening is placed in the middle of the patrix 3 and counterdie 4 of particular manufacturing craft.
In press device, to patrix 3 and counterdie 4 P that exerts pressure, the blade part of impeller after the pressurization Divide to produce distortion, thereby change the opening size of impeller. Produce small open end blade. In order to improve leaf The opening size precision of wheel also can be carried out machining to impeller before pressure processing.
The present invention is applicable to any metal material that can produce plastic deformation. The present invention is difficult to former technology The impeller of 5～3mm opening of producing and the 0.5～3mm impeller that can not produce can be very easily a large amount of Produce. Use the present invention especially to be fit to produce the cast steel impeller of small flow centrifugal pump.
Embodiments of the invention:
For making diameter 255mm, opening size is 3mm, and material is the centrifugal pump impeller of 25# cast steel.
Can cast earlier, diameter is 260mm, and opening size is the 25# cast steel impeller blank of 6mm.Blank machining is proofreaied and correct.Carry out pressure processing then as shown in Figure 1, once the impeller opening size is depressed into 3mm (guaranteeing opening size) by mould.And then machining, make blank reach the design drawing requirement and get final product.
Claims (1)
- A kind of manufacture method of centrifugal pump impeller is characterized in that making opening size behind the impeller of 5～15mm with casting technique, uses pressure processing method again, makes blade produce plastic deformation, reaches needed opening size and shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110254A CN1065799C (en) | 1995-05-23 | 1995-05-23 | Method for producing small open end blade of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110254A CN1065799C (en) | 1995-05-23 | 1995-05-23 | Method for producing small open end blade of centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1136490A CN1136490A (en) | 1996-11-27 |
| CN1065799C true CN1065799C (en) | 2001-05-16 |
Family
ID=5077656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110254A Expired - Fee Related CN1065799C (en) | 1995-05-23 | 1995-05-23 | Method for producing small open end blade of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065799C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588954A (en) * | 1978-12-27 | 1980-07-05 | Kubota Ltd | Casting method of double suction centrifugal pump |
| US4520541A (en) * | 1980-12-19 | 1985-06-04 | Nippon Light Metal Co., Ltd. | Method for producing profiled product having fins |
| CN2162345Y (en) * | 1993-05-12 | 1994-04-20 | 玉环县工业泵厂 | Wholly thermosetting plastic impeller and its making mould |
-
1995
- 1995-05-23 CN CN95110254A patent/CN1065799C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588954A (en) * | 1978-12-27 | 1980-07-05 | Kubota Ltd | Casting method of double suction centrifugal pump |
| US4520541A (en) * | 1980-12-19 | 1985-06-04 | Nippon Light Metal Co., Ltd. | Method for producing profiled product having fins |
| CN2162345Y (en) * | 1993-05-12 | 1994-04-20 | 玉环县工业泵厂 | Wholly thermosetting plastic impeller and its making mould |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136490A (en) | 1996-11-27 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |