CN101773982A - Fluid coupling pump impeller/turbine casting model - Google Patents
Fluid coupling pump impeller/turbine casting model Download PDFInfo
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- CN101773982A CN101773982A CN201010120699A CN201010120699A CN101773982A CN 101773982 A CN101773982 A CN 101773982A CN 201010120699 A CN201010120699 A CN 201010120699A CN 201010120699 A CN201010120699 A CN 201010120699A CN 101773982 A CN101773982 A CN 101773982A
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- pump impeller
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Abstract
The invention relates to a fluid coupling pump impeller/turbine casting model. The model comprises a plurality of cavity models, wherein the cavity models are spliced together, each cavity model comprises a model main body and two runner edges, the model main body has the same shape of the vanes of a pump impeller/turbine, the two runner edges are separately arranged on the two sides of the model main body and integrated with the model main body, and the position between the model main body and the two runner edges is round. The invention can effectively overcome the detect that the fillet at the connection between the vane model and the runner model in the existing pump impeller/turbine casting model is not accurate so as to cause pointed horn and damaged fillet, increases the accuracy and smoothness of the pump impeller/turbine cavity, improves the performance of the fluid coupling pump impeller/turbine and ensures the power transmission of the fluid coupling.
Description
Technical field
The present invention relates to a kind of casting pattern, relate in particular to a kind of fluid-flywheel clutch pump impeller/turbine casting pattern.
Background technology
Pump impeller is the driving wheel of fluid-flywheel clutch transferring power, form by pump impeller blade and runner, working media (oil) is done work, the mechanical energy of prime mover is converted to the kinetic energy and the potential energy of medium, turbine is corresponding with pump impeller, form by turbo blade and runner, absorb the kinetic energy and the potential energy of working media, the kinetic energy of medium is become mechanical energy output with potential energy converting and energy.Blade and runner are the major parts of forming pump impeller and turbine, and the space structure of the two formation is called die cavity, and the moulding of die cavity is relevant with the efficient of the intensity of pump impeller/turbine and coupling device transferring power.
At present, the pump impeller of fluid-flywheel clutch and turbine all are to adopt the casting pattern processing and manufacturing.See also Fig. 1 and Fig. 2, existing fluid-flywheel clutch pump impeller/turbine casting pattern comprises runner model 11 and a plurality of leaf model 12, runner model 11 is provided with a plurality of jacks, leaf model 12 bottoms are provided with socket, during casting, leaf model 12 and runner model 11 are assembled, leaf model 12 is inserted runner model 11, two leaf models 12 are die cavity with the space structure that runner model 11 surrounds, and just can produce pump impeller or turbine through several roads casting technique again after assembling with leaf model 12 and with runner model 11.
But, as shown in Figure 1, because leaf model 12 is a space curve with the mating surface of runner model 11, be difficult to processing, therefore adopt curve of approximation to cooperate usually, this just causes leaf model 12 excessive with the fit clearance of runner model 11, and the fillet of the two junction not only lacks accuracy, also occurs wedge angle easily.Simultaneously,,, be easy to damage and wear and tear, can cause fillet damaged placing and assembling in the process of using because place, the fillet of leaf model 12 receipts limit is very thin.Connecting damaged blade and the runner of all can making of inaccurate and fillet wedge angle of fillet and fillet can not rounding off, when casting, occur easily freely not causing casting defect because of casting liquid flows, influence the accuracy and the smoothness of die cavity, the moulding of die cavity can not meet design requirement.Simultaneously, fillet is damaged also can cause producing alternate stress and damage foundry goods in casting and heat treatment process.Those shortcomings all can structurally cause final pump impeller and turbine stress to be concentrated, and have reduced safety coefficient, have increased the risk of using, and influence the performance of pump impeller and turbine.
As shown in Figure 3, the fillet 133 that respectively connects between the blade 131 of turbine 13 and the runner 132 all lacks accuracy, exist fillet wedge angle and fillet damaged on the connection fillet 133, turbo blade 131 and runner 132 can not rounding ofves, the moulding of die cavity 134 can not meet design requirement, and has increased the loss of coupling device.
In sum, existing pump impeller/turbine casting pattern exists leaf model with runner model junction fillet shortage accuracy, the damaged shortcoming of fillet wedge angle and fillet occurs easily, make cavity molding not meet design requirement, influence the performance of fluid-flywheel clutch pump impeller/turbine.
Summary of the invention
The object of the present invention is to provide a kind of fluid-flywheel clutch pump impeller/turbine casting pattern, exist leaf model with runner model junction fillet shortage accuracy, the damaged shortcoming of fillet wedge angle and fillet occurs easily to solve in the prior art fluid-flywheel clutch pump impeller/turbine casting pattern, make cavity molding not meet design requirement, influence the technical problem of the performance of fluid-flywheel clutch pump impeller/turbine.
For achieving the above object, the invention provides a kind of fluid-flywheel clutch pump impeller/turbine casting pattern, comprise: some die cavity models, each die cavity model splicing connects, the die cavity model comprises model main body and two runner edges, and the model main body is identical with the blade shape of pump impeller/turbine, and two runner edges are separately positioned on model main body both sides, make with the model main body is one-body molded, and model main body and two runner edges round-corner transitions.
According to the described fluid-flywheel clutch pump impeller of preferred embodiment of the present invention/turbine casting pattern, its die cavity model bottom is provided with projection.
According to the described fluid-flywheel clutch pump impeller of preferred embodiment of the present invention/turbine casting pattern, its die cavity model adopts aluminium to make.
The present invention also provides a kind of method of utilizing above-mentioned fluid-flywheel clutch pump impeller/turbine casting pattern to make fluid-flywheel clutch pump impeller/turbine, may further comprise the steps:
(1) each die cavity model is spliced assembling pump impeller/turbine casting pattern;
(2) in the pump impeller that assembles/turbine casting pattern, pour into moulding sand, make pump impeller/turbine sand mold and core;
(3) after filling sand is finished, carry out withdrawing pattern and handle, take off pump impeller/turbine casting pattern, obtain pump impeller/turbine sand mold and core;
(4) pump impeller/turbine sand mold and core are carried out mould assembling, aluminium water is injected, unpack after cooling, obtain pump impeller/turbine from dead head.
Fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern designs pump impeller/turbo blade and runner on the die cavity model of an integral body, by processing accuracy and the smoothness that guarantees to connect fillet.The blade of die cavity model and runner moulding all are simple plane and space curved surface, just can well guarantee by machined, the accuracy and the smoothness of blade side, runner and connection fillet have effectively been improved, it is damaged can not produce fillet wedge angle and fillet, the accuracy and the smoothness of the die cavity of pump impeller/turbine have been improved, improve the performance of fluid-flywheel clutch pump impeller/turbine, guaranteed the transmission of power of coupling device.And casting defects such as in the casting process stage, smooth fillet can be avoided wall unevenness, is not fully filled, crackle.Simultaneously, in the Technology for Heating Processing stage, smooth fillet can discharge stress, crackle of avoiding stress to concentrate causing and repeatedly huge alternate stress are to the damage of foundry goods, improve the inherent quality of foundry goods, structurally guarantee the intensity of pump impeller, turbine, improved the safety coefficient of coupling device, guaranteed the normal operation of coupling device.Therefore, the present invention has effectively overcome leaf model that existing pump impeller/turbine casting pattern exists with runner model junction fillet shortage accuracy, the damaged shortcoming of fillet wedge angle and fillet occurs easily, the accuracy and the smoothness of pump impeller/turbine die cavity have been improved, improve the performance of fluid-flywheel clutch pump impeller/turbine, guaranteed the transmission of power of fluid-flywheel clutch.
Description of drawings
Fig. 1 is the structural representation of existing fluid-flywheel clutch pump impeller/turbine casting pattern;
Fig. 2 is the structural representation of the leaf model of existing fluid-flywheel clutch pump impeller/turbine casting pattern;
Fig. 3 is for adopting the partial structurtes schematic diagram of existing fluid-flywheel clutch pump impeller/turbine that the turbine casting pattern is produced;
Fig. 4 is the structural representation of fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern;
Fig. 5 is the structural representation of the die cavity model of the embodiment of the invention;
Fig. 6 is the application schematic diagram of the fluid-flywheel clutch pump impeller/turbine casting pattern of the embodiment of the invention;
Fig. 7 is the partial structurtes schematic diagram of employing fluid-flywheel clutch pump impeller of the present invention/turbine that the turbine casting pattern is produced.
The specific embodiment
Below in conjunction with accompanying drawing, specify the present invention.
Core of the present invention is: fluid-flywheel clutch pump impeller/turbine casting pattern adopts monolithic construction, with leaf model and runner modelling on the die cavity model of an integral body, runner directly is arranged on the model main body, model main body and runner edges adopt round-corner transition, by processing accuracy and the smoothness that guarantees to connect fillet, thereby the various shortcomings of existing fluid-flywheel clutch pump impeller/turbine casting pattern have effectively been overcome, the accuracy and the smoothness of pump impeller/turbine die cavity have been improved, improve the performance of fluid-flywheel clutch pump impeller/turbine, guaranteed the transmission of power of fluid-flywheel clutch.
See also Fig. 4 to Fig. 5, a kind of fluid-flywheel clutch pump impeller/turbine casting pattern, comprise: some die cavity models 20 made of aluminum, each die cavity model 20 splicing connects, die cavity model 20 comprises model main body 201 and two runner edges 202, and model main body 201 is identical with the blade shape of pump impeller/turbine, and two runner edges 202 are separately positioned on model main body 201 both sides, with model main body 201 one-body molded making, and model main body 201 and two runner edges, 202 round-corner transitions.The shape of runner edges 202 and the flow channel shape of pump impeller/turbine are complementary, and its self model main body 201 1 ends to the width of the other end is narrowed down by wide gradually, and the area of each runner edges 202 is half of flow area between adjacent blades just.
When this fluid-flywheel clutch pump impeller/turbine casting pattern uses, after each die cavity model 20 splicing, the runner edges 202 of adjacent two die cavity models 20 is joined and is formed a sealing surface, forms runner, and the space structure that adjacent two model main bodys 201 and the runner between the two constitute is die cavity.As shown in Figure 4, the accuracy and the smoothness of the knuckle between model main body 201 and two runner edges 202 are good, make cavity molding can reach designing requirement to greatest extent.
As shown in Figure 5, in this example, die cavity model 20 bottoms also are provided with projection 203, and this projection 203 can cooperate the runner model 11 of existing fluid-flywheel clutch pump impeller/turbine casting pattern to use, to make things convenient for the splicing assembling of die cavity model 20.Please consult Fig. 6 simultaneously, die cavity model 20 inserts in the jack of runner model 11, with 11 socket connections of runner model by projection 203.In this example, die cavity model 20 is fixed by projection 203 and jack, the stability that also strengthens each die cavity model 20 splicing not only easy to connect.But, need to prove that the present invention is not limited thereto, for example, die cavity model 20 bottoms can not be provided with projection 203, and directly be arranged to smooth cambered surface, perhaps, runner edges 202 outsides are extended, become solid designs such as integral body all can adopt die cavity model 20 arranged outside, as long as guarantee the shape of runner edges 202 inside, do not limited for the concrete shape in runner edges 202 outsides, can adopt arbitrary shape.When smooth cambered surface directly was arranged in the bottom, when assembling splicing just can be in addition firm by common annulus.Therefore; the present invention does not limit the concrete shape in die cavity model 20 bottoms and the outside; and; any can realization assembled 20 splicings of die cavity model and carried out firm mode and all should drop in protection scope of the present invention in the prior art; more than employing also is provided with projection 203 and cooperates just example of runner model 11 splicing assemblings in die cavity model 20 bottoms, and is not used in qualification the present invention.
In addition, in this example, die cavity model 20 adopts aluminium to make, yet this is an example also, and is not used in qualification the present invention.
Fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern adopts monolithic construction, leaf model and runner modelling on the die cavity model of an integral body, runner directly is arranged on the model main body, has solved the defect problem that connects fillet in the existing split type model.Realize that key of the present invention is to design the mould that a cover can water out monoblock type die cavity model.When designing mould, to take into full account the shrinkage factor and the pattern draft of foundry goods, the number of blade according to the difference requirement, divide the runner number that does not wait, determine the size of die cavity mould shell again according to the size of runner, determine the size of mould side plate according to thickness, gradient and the connection fillet of required blade, several mould parts assembled formations, be cast into leaf model afterwards through cast gate.Be specially: at first, according to designing the channel size that the pump, the turbine components figure that finish obtain blade quantity and single blade shape and single blade, the channel size of single blade is divided equally the runner gained of part according to the number of blade; Afterwards, determine the shape of concrete die cavity model quantity, single die cavity model, the size that connects fillet and the channel size of single die cavity model according to the channel size of the blade quantity that obtains, single blade shape and single blade, again according to the illustraton of model of required size design die cavity model.In addition, the present invention adopts aluminium to make, because aluminium meeting contraction after casting, so the size of die cavity model should be big according to the normal size of shrinkage ratio part.After the size of model is determined, just can designing mould.According to the model size of main body designing mould shell of die cavity model, wherein runner and cast gate just are included in the shell, note considering shrinkage factor and pattern draft during design, also will open the steam vent of sufficient amount.The gradient and the fillet size that design side plate and piece according to the gradient and the fillet size of model main body, and then add bonnet and cover plate, blade mold design is so far finished.Its material therefor all is a common iron, just can realize with machined.Process the back these several big parts assembly unit moulding, inject aluminium water from cast gate, wait cooling to shrink after, just formed the die cavity model.
Based on above-mentioned fluid-flywheel clutch pump impeller/turbine casting pattern, the present invention also provides a kind of method of utilizing above-mentioned fluid-flywheel clutch pump impeller/turbine casting pattern to make fluid-flywheel clutch pump impeller/turbine, may further comprise the steps:
(1) each die cavity model is spliced assembling pump impeller/turbine casting pattern;
(2) in the pump impeller that assembles/turbine casting pattern, pour into moulding sand, make pump impeller/turbine sand mold and core;
(3) after filling sand is finished, carry out withdrawing pattern and handle, take off pump impeller/turbine casting pattern, obtain pump impeller/turbine sand mold and core;
(4) pump impeller/turbine sand mold and core are carried out mould assembling, aluminium water is injected, unpack after cooling, obtain pump impeller/turbine from dead head.
Please consult Fig. 7 again, it is the structural representation of employing fluid-flywheel clutch pump impeller of the present invention/turbine that the turbine casting pattern is produced.As shown in the figure, between the blade 211 of turbine 21 and the runner 212 respectively to connect fillet 213 all accurate, smooth, connect not exist fillet wedge angle and fillet damaged on the fillet 213 turbo blade 211 and runner 212 rounding ofves, the moulding of die cavity meets design requirement, and has strengthened the performance of turbine.See also table 1, it is the performance comparison table of the pump impeller/turbine of employing fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern and existing fluid-flywheel clutch pump impeller/turbine casting pattern production.
Table 1
As can be seen from Table 1, the pump impeller/turbine that adopts fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern production all is significantly increased than the safety coefficient and the moment coefficient of the pump impeller/turbine of existing casting pattern production, has improved the performance of pump impeller/turbine.
Fluid-flywheel clutch pump impeller of the present invention/turbine casting pattern designs pump impeller/turbo blade and runner on the die cavity model of an integral body, by processing accuracy and the smoothness that guarantees to connect fillet.The blade of die cavity model and runner moulding all are simple plane and space curved surface, just can well guarantee by machined, the accuracy and the smoothness of blade side, runner and connection fillet have effectively been improved, it is damaged can not produce fillet wedge angle and fillet, the accuracy and the smoothness of the die cavity of pump impeller/turbine have been improved, improve the performance of fluid-flywheel clutch pump impeller/turbine, guaranteed the transmission of power of coupling device.And casting defects such as in the casting process stage, smooth fillet can be avoided wall unevenness, is not fully filled, crackle.Simultaneously, in the Technology for Heating Processing stage, smooth fillet can discharge stress, crackle of avoiding stress to concentrate causing and repeatedly huge alternate stress are to the damage of foundry goods, improve the inherent quality of foundry goods, structurally guarantee the intensity of pump impeller, turbine, improved the safety coefficient of coupling device, guaranteed the normal operation of coupling device.Therefore, the present invention has effectively overcome leaf model that existing pump impeller/turbine casting pattern exists with runner model junction fillet shortage accuracy, the damaged shortcoming of fillet wedge angle and fillet occurs easily, the accuracy and the smoothness of pump impeller/turbine die cavity have been improved, improve the performance of fluid-flywheel clutch pump impeller/turbine, guaranteed the transmission of power of fluid-flywheel clutch.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (4)
1. fluid-flywheel clutch pump impeller/turbine casting pattern, it is characterized in that, comprise: some die cavity models, described each die cavity model splicing connects, described die cavity model comprises model main body and two runner edges, and described model main body is identical with the blade shape of pump impeller/turbine, and described two runner edges are separately positioned on described model main body both sides, with one-body molded the making of described model main body, and described model main body and described two runner edges round-corner transitions.
2. fluid-flywheel clutch pump impeller as claimed in claim 1/turbine casting pattern is characterized in that, described die cavity model bottom is provided with projection.
3. the described fluid-flywheel clutch pump impeller of claim 1/turbine casting pattern is characterized in that, described die cavity model adopts aluminium to make.
4. a method of utilizing fluid-flywheel clutch pump impeller as claimed in claim 1/turbine casting pattern to make fluid-flywheel clutch pump impeller/turbine is characterized in that, may further comprise the steps:
(1) each die cavity model is spliced assembling pump impeller/turbine casting pattern;
(2) in the pump impeller that assembles/turbine casting pattern, pour into moulding sand, make pump impeller/turbine sand mold and core;
(3) after filling sand is finished, carry out withdrawing pattern and handle, take off pump impeller/turbine casting pattern, obtain pump impeller/turbine sand mold and core;
(4) pump impeller/turbine sand mold and core are carried out mould assembling, aluminium water is injected, unpack after cooling, obtain pump impeller/turbine from dead head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101206997A CN101773982B (en) | 2010-02-01 | 2010-02-01 | Fluid coupling pump impeller/turbine casting model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101206997A CN101773982B (en) | 2010-02-01 | 2010-02-01 | Fluid coupling pump impeller/turbine casting model |
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| Publication Number | Publication Date |
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| CN101773982A true CN101773982A (en) | 2010-07-14 |
| CN101773982B CN101773982B (en) | 2012-01-11 |
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| CN2010101206997A Expired - Fee Related CN101773982B (en) | 2010-02-01 | 2010-02-01 | Fluid coupling pump impeller/turbine casting model |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228979A (en) * | 2011-06-28 | 2011-11-02 | 上海交大南洋机电科技有限公司 | Casting method of aluminium alloy impeller assembly of large-diameter hydraulic coupler |
| CN104001864A (en) * | 2014-04-23 | 2014-08-27 | 黄石新兴管业有限公司 | Large horizontal axial flow pump split guide vane casting method |
| CN110586874A (en) * | 2019-10-28 | 2019-12-20 | 襄阳五二五泵业有限公司 | Manufacturing method of integral impeller sand core |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004167595A (en) * | 2002-11-22 | 2004-06-17 | Hirotoshi Baba | Impeller and method of machining the same |
| CN101579721B (en) * | 2009-06-21 | 2011-05-04 | 宁波强盛机械模具有限公司 | Casting technique of aluminum alloy multi-blade casting part |
| CN201644722U (en) * | 2010-02-01 | 2010-11-24 | 上海交大南洋机电科技有限公司 | Pump wheel/turbine casting model for hydraulic coupler |
-
2010
- 2010-02-01 CN CN2010101206997A patent/CN101773982B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228979A (en) * | 2011-06-28 | 2011-11-02 | 上海交大南洋机电科技有限公司 | Casting method of aluminium alloy impeller assembly of large-diameter hydraulic coupler |
| CN104001864A (en) * | 2014-04-23 | 2014-08-27 | 黄石新兴管业有限公司 | Large horizontal axial flow pump split guide vane casting method |
| CN104001864B (en) * | 2014-04-23 | 2016-04-27 | 黄石新兴管业有限公司 | Large-size horizontal axial-flow pump opposite opened diffuser casting method |
| CN110586874A (en) * | 2019-10-28 | 2019-12-20 | 襄阳五二五泵业有限公司 | Manufacturing method of integral impeller sand core |
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| CN101773982B (en) | 2012-01-11 |
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