CN204770479U - The gating system of thin wall toper hydraulic turbine crown steel -casting - Google Patents
The gating system of thin wall toper hydraulic turbine crown steel -casting Download PDFInfo
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- CN204770479U CN204770479U CN201520359898.1U CN201520359898U CN204770479U CN 204770479 U CN204770479 U CN 204770479U CN 201520359898 U CN201520359898 U CN 201520359898U CN 204770479 U CN204770479 U CN 204770479U
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Abstract
The utility model relates to a the gating system of thin wall toper hydraulic turbine crown steel -casting, including the unhurried current cross gate of the sprue of pouring basin, vertical direction, horizontal direction the unhurried current cross gate is terminal be two bursts of one -levels repositions of redundant personnel along die cavity bilateral symmetry branch and waters, and the reposition of redundant personnel of per share one -level is watered and terminally is two strands of second grades along die cavity bottom side periphery symmetry branch and shunts and water, the cross gate is connected respectively to the end that the second grade reposition of redundant personnel was watered, the cross gate include the cross gate no. 1 that sets up along the radial level in die cavity bottom and with the perpendicular cross gate of being connected no. 2 in a cross gate outer end, cross gate no. 1 waters in being connected with the oval -shaped perpendicularly near radial the inner, each water in watering a connection integral annular in circular, water intercommunication bottom the steel -casting die cavity in the integral annular, cross gate no. 2 is close to both ends punishment and do not is connected with perpendicularly and waters in circular, water in circular and upwards extend to the downside in foundry goods die cavity interior thickness thickness and communicate with the die cavity perpendicularly.
Description
Technical field
The utility model relates to casting technology field, particularly a kind of running gate system of thin-wall conical hydraulic turbine crown steel-casting.
Background technology
Our company is the rotary wheel of water turbine crown foundry goods that certain water power manufacturer manufactures, as shown in Figure 1, and substance 15300kg, top maximum gauge 3440mm, bottom minimum diameter 500mm, height 1800mm, bottom minimum wall thickness (MINI W.) 30mm, 70 ° are about to the tapering of top profile bottom foundry goods, and foundry goods thickness is positioned at the middle part of short transverse, all regions of this foundry goods are the requirement of UT2 level, and quality requirement is very high, especially flow-passing surface region needs to weld blade, has not allowed the defect such as slag inclusion and pore.Therefore, running gate system must ensure in cast cavity filling process without sand washing, can reduce the problems such as the refluence of molten steel, turbulent flow, volume gas to greatest extent, can reduce Slag inclusion enters die cavity or can ensure that Slag inclusion floats to rising head smoothly, and guarantee foundry goods is without the defect such as slag inclusion and pore.
Existing running gate system is the complete ceramic running gate system of injection method in the middle of adopting, and namely ingate is positioned at the mid portion of foundry goods, and running gate system comprises cup, sprue, unhurried current cross gate, cross gate and ingate.Cross gate is unitary circular structure, ingate directly by cross gate extraction channel die cavity, the collection slag ability of cross gate.During actual cast, cast molten steel amount is large, the influent stream speed of ingate is uneven, average influent stream speed 0.65m/s, but have the influent stream speed of part ingate only to have about 0.3m/s, the influent stream speed of some ingate is then up to about 1m/s, and too high influent stream speed causes the sand mold around ingate to wash away seriously, simultaneously because ingate influent stream velocity deviation is large, easily produce turbulent phenomenon.Refluence phenomenon can be there is lower than the casting portion of ingate height during cast, easily cause volume gas and slag problem.The foundry goods flow-passing surface of actual production and upper surface all find slag inclusion and pore class defect when detecting.
Utility model content
The purpose of this utility model provides a kind of thin-wall conical hydraulic turbine crown Gating System for Casting Steel for the deficiencies in the prior art, to solve sand washing in such steel-casting cast cavity filling process, refluence and volume gas problem, thus improves quality and the qualification rate of steel-casting.
The purpose of this utility model realizes like this, a kind of running gate system of thin-wall conical hydraulic turbine crown steel-casting, big up and small down tapered of the die cavity of described steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, described running gate system comprises cup successively, the sprue of vertical direction, the unhurried current cross gate of horizontal direction, described unhurried current cross gate end branches into two strand of one level shunt running channel along die cavity bilateral symmetry, a per share level shunt running channel end is two strand of two level shunt running channel along periphery, die cavity bottom side symmetric part of matrix, the end of described two level shunt running channels connects cross gate respectively, described cross gate comprises the cross gate one and cross gate two connected vertically with cross gate one outer end that arrange along cavity bottom radial level, described cross gate one is vertically connected with oval ingate near radial inner end, each described oblong ingate connects an integral annular ingate, described integral annular ingate is communicated with steel-casting cavity bottom, described cross gate two is vertically connected with circular ingate respectively near two ends place, described circular ingate extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
The running gate system of thin-wall conical hydraulic turbine crown steel-casting of the present utility model, molten steel is after sprue realizes certain deceleration to unhurried current cross gate, being divided into two is divided into two after entering a level shunt running channel respectively again enters two level shunt running channels respectively, carry out respectively cross gate one from two level shunt running channels again, then the molten steel flowing through cross gate one is split into two strands, the oval ingate of one stock-traders' know-how is pooled to integral annular ingate and enters die cavity from thin-walled cavity bottom, another burst of steel flow is split into two stocks again to cross gate two and does not enter the thickness thickness of circular ingate upwards in the middle part of die cavity and enter in die cavity and carry out filling type cast.In running gate system of the present utility model, molten steel is through the cushioning effect of two-stage shunting running channel, the flowing kinetic energy of further reduction molten steel, thus reduce the flow velocity entering ingate molten steel, avoid the slag floated in cross gate to mix and brought into ingate by high velocity liquid stream, and produce splash and wash away sand mold when avoiding molten steel to enter die cavity, when type is filled in cast, molten steel is respectively from wall thickness thinnest part and Liang Ge position, middle wall thickness thickness influent stream bottom foundry goods, the temperature of effective raising rising head, ensure that the thermograde of foundry goods is conducive to consecutive solidification, simultaneously, reduce the molten steel influent stream amount in integral annular ingate and the thinnest region of wall thickness, bottom, reduce this region molten steel washing away sand mold.
For ease of the molten iron in purification running channel, the end of described cross gate one radially inner side is provided with slag trap, and the two ends of described cross gate two are also provided with slag trap; Described slag trap adopts refractory material to make.In this structure, at the cross gate end near ingate position, slag trap is set, unhurried current cross gate is washed away at first for collecting, one level shunt running channel, first strand of molten steel of two level shunt running channels and cross gate, avoids the field trash in running gate system to enter die cavity by oval ingate, circular ingate and integral annular ingate.
For reducing cast folder matter further, each running channel of described running gate system adopts ceramic material pipe to make.
For accurately controlling the filling velocity that each ingate molten steel enters die cavity further, and effectively prevent filling shaped steel water and flow backwards, roll up gas, the actual internal area of described sprue is S1, the actual internal area sum of a described level shunt running channel is S2, the actual internal area sum of described two level shunt running channels is S3, the flow area sum of described cross gate one is S4, the flow area sum of described oval ingate is S5, the actual internal area of described circular ingate is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1.
For optimizing the utility model further, the influent stream speed of described oval ingate and circular ingate inner metal liquid is 0.45 ~ 0.5m/s.
As further improvement of the utility model, the internal diameter of described circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.
Accompanying drawing explanation
Fig. 1 is the structural representation of thin-wall conical hydraulic turbine crown steel-casting of the present utility model.
Fig. 2 is the injection system structure schematic diagram of thin-wall conical hydraulic turbine crown steel-casting of the present utility model.
Fig. 3 is the cast schematic diagram of thin-wall conical hydraulic turbine crown steel-casting of the present utility model.
Wherein, 1 steel-casting; 2 sprues; 3 slow water cross gate; 4 slag traps; 5 cross gates two; 6 one level shunt running channels; 7 two level shunt running channels; 8 cross gates one; 9 oval ingates; 10 circular ingates; 11 integral annular ingates; 12 cups.
Detailed description of the invention
If Fig. 1 is the thin-wall conical hydraulic turbine crown steel-casting adopting the utility model running gate system, Fig. 2 and the running gate system that Figure 3 shows that thin-wall conical hydraulic turbine crown steel-casting of the present utility model, big up and small down tapered of the die cavity of this steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, running gate system of the present utility model comprises cup 12 successively, the sprue 2 of vertical direction, the unhurried current cross gate 3 of horizontal direction, unhurried current cross gate 3 end branches into two strand of one level shunt running channel 6 along die cavity bilateral symmetry, per share level shunt running channel 6 end is two strand of two level shunt running channel 7 along periphery, die cavity bottom side symmetric part of matrix, the end that two level shunts are watered connects cross gate respectively, cross gate of the present utility model comprises the cross gate 1 and cross gate two 5 connected vertically with cross gate 1 outer end that arrange along cavity bottom radial level, cross gate 1 is vertically connected with oval ingate 9 near radial inner end, each oblong ingate 9 connects an integral annular ingate 11, integral annular ingate 11 is communicated with steel-casting cavity bottom, cross gate 25 is vertically connected with circular ingate 10 respectively near two ends place, circular ingate 10 extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
For ease of the molten iron in purification running channel, the end of cross gate 1 radially inner side is provided with slag trap 4, and the two ends of cross gate 25 are also provided with slag trap 5; This slag trap 5 adopts refractory material to make.In this structure, at the cross gate end near ingate position, slag trap is set, unhurried current cross gate 3 is washed away at first for collecting, one level shunt running channel 6, first strand of molten steel of two level shunt running channels 7 and cross gate, avoids the field trash in running gate system to enter die cavity by oval ingate 9, circular ingate 10 and integral annular ingate 11.
For reducing cast folder matter further, each running channel of running gate system adopts ceramic material pipe to make.
For accurately controlling the filling velocity that each ingate molten steel enters die cavity further, and effectively prevent filling shaped steel water and flow backwards, roll up gas, the actual internal area of described sprue is S1, the actual internal area sum of one level shunt running channel 6 is S2, the actual internal area sum of two level shunt running channels 7 is S3, the flow area sum of cross gate 1 is S4, the flow area sum of oval ingate 9 is S5, the actual internal area of circular ingate 10 is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1; Further, the internal diameter of circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.In running gate system of the present utility model, by the control of each running channel size of leading portion and structure, the influent stream speed that can realize the oval ingate 9 of molten iron and circular ingate 10 inner metal liquid is 0.45 ~ 0.5m/s.
The running gate system of thin-wall conical hydraulic turbine crown steel-casting of the present utility model, during cast, molten steel is after sprue 2 realizes certain deceleration to unhurried current cross gate 3, being divided into two is divided into two after entering a level shunt running channel 7 respectively again enters two level shunt running channels 7 respectively, carry out respectively cross gate 1 from two level shunt running channels 7 again, then the molten steel flowing through cross gate 1 is split into two strands, the oval ingate 9 of one stock-traders' know-how is pooled to integral annular ingate 11 and enters die cavity from thin-walled cavity bottom, another burst of steel flow is split into two stocks again to cross gate 25 and does not enter the thickness thickness of circular ingate 10 upwards in the middle part of die cavity and enter in die cavity and carry out filling type cast.In running gate system of the present utility model, molten steel is through the cushioning effect of two-stage shunting running channel, the flowing kinetic energy of further reduction molten steel, thus reduce the flow velocity entering ingate molten steel, avoid the slag floated in cross gate to mix and brought into ingate by high velocity liquid stream, and produce splash and wash away sand mold when avoiding molten steel to enter die cavity, when type is filled in cast, molten steel is respectively from wall thickness thinnest part and Liang Ge position, middle wall thickness thickness influent stream bottom foundry goods, the temperature of effective raising rising head, ensure that the thermograde of foundry goods is conducive to consecutive solidification, simultaneously, reduce the molten steel influent stream amount in integral annular ingate and the thinnest region of wall thickness, bottom, reduce this region molten steel washing away sand mold.
Claims (6)
1. the running gate system of a thin-wall conical hydraulic turbine crown steel-casting, it is characterized in that, big up and small down tapered of the die cavity of described steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, described running gate system comprises cup successively, the sprue of vertical direction, the unhurried current cross gate of horizontal direction, described unhurried current cross gate end branches into two strand of one level shunt running channel along die cavity bilateral symmetry, a per share level shunt running channel end is two strand of two level shunt running channel along periphery, die cavity bottom side symmetric part of matrix, the end of described two level shunt running channels connects cross gate respectively, described cross gate comprises the cross gate one and cross gate two connected vertically with cross gate one outer end that arrange along cavity bottom radial level, described cross gate one is vertically connected with oval ingate near radial inner end, each described oblong ingate connects an integral annular ingate, described integral annular ingate is communicated with steel-casting cavity bottom, described cross gate two is vertically connected with circular ingate respectively near two ends place, described circular ingate extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
2. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 1, is characterized in that, the end of described cross gate one radially inner side is provided with slag trap, and the two ends of described cross gate two are also provided with slag trap; Described slag trap adopts refractory material to make.
3. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, each running channel of described running gate system adopts ceramic material pipe to make.
4. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, it is characterized in that, the actual internal area of described sprue is S1, the actual internal area sum of a described level shunt running channel is S2, the actual internal area sum of described two level shunt running channels is S3, the flow area sum of described cross gate one is S4, the flow area sum of described oval ingate is S5, the actual internal area of described circular ingate is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1.
5. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, the influent stream speed of described oval ingate and circular ingate inner metal liquid is 0.45 ~ 0.5m/s.
6. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, the internal diameter of described circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889332A (en) * | 2015-05-29 | 2015-09-09 | 共享铸钢有限公司 | Pouring system of upper crown steel casting piece of thin-wall conical water turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889332A (en) * | 2015-05-29 | 2015-09-09 | 共享铸钢有限公司 | Pouring system of upper crown steel casting piece of thin-wall conical water turbine |
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