CN110792631A - Plastic pump impeller and forming die thereof - Google Patents
Plastic pump impeller and forming die thereof Download PDFInfo
- Publication number
- CN110792631A CN110792631A CN201910997558.4A CN201910997558A CN110792631A CN 110792631 A CN110792631 A CN 110792631A CN 201910997558 A CN201910997558 A CN 201910997558A CN 110792631 A CN110792631 A CN 110792631A
- Authority
- CN
- China
- Prior art keywords
- impeller
- plastic pump
- mold
- blade
- pump impeller
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
Abstract
The invention discloses a plastic pump impeller and a forming die thereof.A section of pressurizing blade is added between two blades of a conventional impeller of a plastic pump and extends to an outlet, and the thickness of the pressurizing blade is designed according to the original blade and the flowing direction of liquid. When the liquid flows from the inlet to the beginning of the pressurizing blade, the liquid is pressurized again by the pressurizing blade until being forced to be separated from the impeller at a high speed, the residence time of the liquid between the blades is shortened, and the liquid is uniformly pressurized by the blades, so the invention can improve the flow rate, the lift and the efficiency of the plastic pump. And the outlet position of the plastic pump impeller is added with blades, the distance between every two blades is reduced, the strength of the front cover plate and the rear cover plate of the impeller is increased, and the plastic impeller is not easy to deform.
Description
Technical Field
The invention relates to the technical field of pump valves, in particular to a plastic pump impeller and a forming die thereof.
Background
In the plastic pump impeller, a mold pumping block (a plug sheet) between impeller blades needs to be demolded from an impeller outlet position during molding, and the outlet width determines the thickness of the plug sheet. Therefore, the plastic pump impeller blade cannot extend excessively to the inlet and cannot be twisted, so that the overflowing area of the inlet of the plastic pump impeller is far smaller than that of the metal pump impeller, and the width of the outlet of the impeller is fixed, so that the diffusion ratio of the areas of the outlet and the inlet of the plastic pump impeller is far larger than that of the metal pump impeller, and particularly when the plastic pump impeller is used at a low flow and high lift, the diameter of the impeller is large, and the diffusion ratio of the areas of the outlet and the inlet of the impeller is larger, so that the pressure at the outlet between the two blades of the impeller is suddenly reduced due to the area diffusion. Liquid always flows from high pressure to low pressure, and the position near the blades at the outlet is a high-pressure area, so that the liquid can flow from the high pressure to the low-pressure area, and the liquid can not be centrifugally thrown out by the impeller in time, thereby influencing the flow, the lift and the efficiency. Because the front cover plate and the rear cover plate of the impeller are also provided with high-pressure areas, and the front cover plate and the rear cover plate of the impeller of the plastic pump are made of plastic, the front cover plate and the rear cover plate of the impeller are easy to deform under the action of pressure for a long time, and are sunken inwards to block the area of an outlet at the low-pressure position under the action of continuous pressure in serious conditions, and finally, the flow is reduced or even cut off.
Disclosure of Invention
The invention provides a plastic pump impeller and a forming die thereof, which can solve the problems and improve the pump flow, the pump lift and the pump efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a plastic pump impeller is provided, wherein a section of pressurizing blade is added between two conventional blades of the plastic pump impeller and extends to an outlet.
The further technology of the invention is as follows:
preferably, the thickness of the pressurizing blade is designed according to the original blade and according to the flowing direction of the liquid.
The invention also provides a forming die for preparing the plastic pump impeller;
the impeller forming mold comprises a pressing mold, a mold sleeve, a bottom mold, a plug piece and a plug piece seat, wherein the pressing mold is matched with the mold sleeve, the mold sleeve is matched with the bottom mold, and the plug piece is divided into three layers, and each layer is divided into N pieces according to a blade flow passage;
the die sleeve, the bottom die and the plug piece are fixed by penetrating the dovetail structures through bolts.
Preferably, the dovetail structure of the bottom die is provided with a clamping groove, the plug sheets are provided with dovetail clamping plates, and all the plug sheets are fixed in the clamping groove of the bottom die by utilizing the dovetail clamping plates according to layers.
The invention has the beneficial effects that:
the invention can improve the flow, the lift and the efficiency of the plastic pump. And the outlet position of the plastic pump impeller is added with blades, the distance between every two blades is reduced, the strength of the front cover plate and the rear cover plate of the impeller is increased, and the plastic impeller is not easy to deform.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic structural view of a plastic pump impeller;
FIG. 2 is a schematic structural diagram of a prior art plastic pump impeller;
FIG. 3 is a schematic structural view of a bottom mold in front view;
FIG. 4 is a side view of the bottom mold;
FIG. 5 is a front view of the plug;
FIG. 6 is a side view of the plug;
the labels in the figures are: 1. an impeller; 2. a blade; 3. a pressurizing blade; 11. pressing the die; 12. die sleeve; 13. Bottom die; 14. a plug sheet; 15. a plug seat; 16. a card slot; 17. dovetail snap-gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a plastic pump impeller according to the invention, in which a section of pressure-exerting vane 3 is added between two vanes 2 of the impeller 1 (the existing impeller, see fig. 2) (in the middle of the low-pressure region) and extends to the outlet.
The thickness of the pressurizing blade 3 is designed according to the original blade 2 and the flowing direction of the liquid.
When the liquid flows from the inlet to the beginning of the pressurizing blade 3, the liquid is pressurized again by the pressurizing blade 3 until it is forced to exit the impeller 1 at high speed. The residence time of the liquid between the blades 2 is shortened, and the liquid is uniformly pressed by the blades 2, so the plastic pump can improve the flow rate, the lift and the efficiency of the plastic pump.
And the outlet position of the plastic pump impeller is added with blades, the distance between every two blades is reduced, the strength of the front cover plate and the rear cover plate of the impeller is increased, and the impeller is not easy to deform.
The invention also provides a forming die for preparing the plastic pump impeller;
FIG. 2 is a mold for molding the impeller of the present invention;
the impeller forming mold comprises a pressing mold 11, a mold sleeve 12, a bottom mold 13 (shown in figures 3-4), a plug piece 14 (shown in figures 5-6) and a plug piece seat 15, wherein the pressing mold is matched with the mold sleeve, the mold sleeve is matched with the bottom mold, and the plug piece is divided into three layers, and each layer is divided into N pieces according to blade runners;
every two of the plug sheets are attached together, and a blade forming cavity is formed in the middle of the plug sheets;
the die sleeve, the bottom die and the plug piece are fixed by penetrating the dovetail structures through bolts.
A clamping groove 16 is formed in the dovetail structure of the bottom die, dovetail clamping plates 17 are arranged on the plug pieces, and all the plug pieces are fixed in the clamping groove of the bottom die through the dovetail clamping plates in a layer mode.
The method for preparing the plastic pump impeller by using the forming die comprises the following steps:
before compression molding, plastic powder with proper weight is put into a mold sleeve of an impeller compression molding mold, and then the whole mold is put into an electric heating box to be heated to the temperature required by plastic melting.
The impeller insert is fixed on the primary pressing die through threads and is heated together with the primary pressing die;
when in pressing, the whole compression molding mould of the impeller is placed on a hydraulic press, and the primary pressing mould with the impeller insert is placed in a mould sleeve to compact the heated and melted plastics.
Then the primary pressing die is screwed out and taken down through threads, a secondary pressing die is replaced, the plastic with required quality heated to the standard temperature is supplemented, and then the product is pressed and formed according to the pressure required by plastic pressing and then is naturally cooled;
and sequentially removing the secondary pressing die, the large pressing die, the die sleeve, the bottom die and the plug seat during demoulding.
Then, N plugging pieces in each layer are sequentially removed from the outlet position of the impeller according to the plugging piece 3 layer 141, the plugging piece 2 layer 142 and the plugging piece 1 layer 143, and according to the flow line type direction of the blades, as shown in FIG. 5.
In practical application, the flow of the impeller adopting the pressurizing blades in the same type is increased by 20-40%. Taking the model of the plastic-lined centrifugal pump 150 and 125 and 315 as examples, the inlet aperture is 150mm, and the outlet aperture is 125 mm. The following is the comparison of the parameters when the pump of the model is actually tested and converted into the standard rotating speed (1450 r/min):
front-to-back comparison of impeller with pressurized blades
By comparison, the impeller disclosed by the invention improves the outlet flow rate of the pump under the communicated condition, so that the flow and the efficiency are greatly improved under the same lift requirement.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A plastic pump impeller characterized by: between two conventional blades of a plastic pump impeller, a segment of pressurizing blade is added and extends to the outlet.
2. A plastic pump impeller as claimed in claim 1 wherein: the thickness of the pressurizing blade is designed according to the original blade and the flowing direction of the liquid.
3. A molding die for producing a plastic pump impeller according to any one of claims 1 to 2, characterized in that:
the impeller forming mold comprises a pressing mold, a mold sleeve, a bottom mold, a plug piece and a plug piece seat, wherein the pressing mold is matched with the mold sleeve, the mold sleeve is matched with the bottom mold, and the plug piece is divided into three layers, and each layer is divided into N pieces according to a blade flow passage;
every two of the plug sheets are attached together, and a blade forming cavity is formed in the middle of the plug sheets;
the die sleeve, the bottom die and the plug piece are fixed by penetrating the dovetail structures through bolts.
4. A molding die for manufacturing a plastic pump impeller according to claim 3, wherein: the dovetail structure of the bottom die is provided with a clamping groove, the plug sheets are provided with dovetail clamping plates, and all the plug sheets are fixed in the clamping groove of the bottom die by utilizing the dovetail clamping plates according to layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997558.4A CN110792631A (en) | 2019-10-17 | 2019-10-17 | Plastic pump impeller and forming die thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997558.4A CN110792631A (en) | 2019-10-17 | 2019-10-17 | Plastic pump impeller and forming die thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792631A true CN110792631A (en) | 2020-02-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910997558.4A Pending CN110792631A (en) | 2019-10-17 | 2019-10-17 | Plastic pump impeller and forming die thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792631A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203752380U (en) * | 2014-02-19 | 2014-08-06 | 安徽卧龙泵阀有限责任公司 | Impeller mold lined with fluoroplastics |
| WO2016165795A1 (en) * | 2015-04-15 | 2016-10-20 | Sulzer Management Ag | An impeller for a centrifugal headbox feed pump |
| CN108443217A (en) * | 2018-04-29 | 2018-08-24 | 成都亚沃航空科技有限公司 | A kind of shunting centrifugal impeller |
| CN108466396A (en) * | 2018-05-30 | 2018-08-31 | 安徽凯特泵业有限公司 | The molding die of impeller |
-
2019
- 2019-10-17 CN CN201910997558.4A patent/CN110792631A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203752380U (en) * | 2014-02-19 | 2014-08-06 | 安徽卧龙泵阀有限责任公司 | Impeller mold lined with fluoroplastics |
| WO2016165795A1 (en) * | 2015-04-15 | 2016-10-20 | Sulzer Management Ag | An impeller for a centrifugal headbox feed pump |
| CN108443217A (en) * | 2018-04-29 | 2018-08-24 | 成都亚沃航空科技有限公司 | A kind of shunting centrifugal impeller |
| CN108466396A (en) * | 2018-05-30 | 2018-08-31 | 安徽凯特泵业有限公司 | The molding die of impeller |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200214 |