CN117920972A - Casting device for inner cylinder of steam turbine - Google Patents
Casting device for inner cylinder of steam turbine Download PDFInfo
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- CN117920972A CN117920972A CN202410322956.7A CN202410322956A CN117920972A CN 117920972 A CN117920972 A CN 117920972A CN 202410322956 A CN202410322956 A CN 202410322956A CN 117920972 A CN117920972 A CN 117920972A
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- 238000005266 casting Methods 0.000 title claims abstract description 46
- 230000007306 turnover Effects 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 description 20
- 239000000047 product Substances 0.000 description 13
- 238000007493 shaping process Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a casting device of an inner cylinder of a steam turbine, which comprises a casting mould for casting a rotor; the casting mold comprises an upper mold, a lower mold matched with the upper mold, a lifting device for driving the upper mold to rise and a turnover device for driving the lower mold to turn over; the lower surface of the upper die forms an upper forming cavity; the upper surface of the lower die forms a first lower forming cavity, and the lower surface of the lower die forms a second lower forming cavity; in the actual use process, two lower forming cavities matched with the upper die are arranged on the lower die, and when one lower forming cavity is formed, the lower forming cavity is turned over for 180 degrees, so that casting operation can be performed simultaneously in the demolding process, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of internal cylinders of steam turbines, in particular to a casting device for internal cylinders of steam turbines.
Background
The steam turbine is also called a steam turbine engine, and is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with a blade row rotates and simultaneously does work outwards. Steam turbines are the main equipment of modern thermal power plants and are also used in metallurgical industry, chemical industry and ship power plants.
The inner cylinder part of the steam turbine comprises a rotor and a stator, in the process of casting the rotor in the prior art, the die is clamped firstly, molten metal is poured into a forming cavity, the die is opened after forming, the die is unloaded, and then the next forming operation is carried out.
If the publication number is CN218050199U, the sand mould of the cylinder part in the steam turbine cannot be cast for the second time during unloading, so that the molding efficiency is greatly reduced. Further, as disclosed in publication No. CN114570918A, a high-efficiency casting mold improves the productivity by improving the cooling effect, but it still cannot be cast again while discharging.
Disclosure of Invention
First, the technical problem to be solved
In order to solve the problems in the prior art, the invention provides a turbine inner cylinder casting device.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
A casting device of a steam turbine inner cylinder comprises a casting mould for casting a rotor; the casting mold comprises an upper mold, a lower mold matched with the upper mold, a lifting device for driving the upper mold to rise and a turnover device for driving the lower mold to turn over; the lower surface of the upper die forms an upper forming cavity; the upper surface of the lower die forms a first lower molding cavity, and the lower surface of the lower die forms a second lower molding cavity.
Further, the turnover device comprises a first turnover mechanism and a second turnover mechanism which are respectively arranged at two sides of the casting mold.
Further, the first turnover mechanism comprises a first fixed frame, a first rotating gear, a first rotating shaft connected between the first fixed frame and the lower die, and a first rotating driving device for driving the first rotating gear to rotate; the first rotating gear is sleeved on the first rotating shaft, the first rotating shaft is in rotating connection with the first fixing frame, and the first rotating shaft is in fixed connection with the lower die.
The second turnover mechanism comprises a second fixing frame, a second rotating gear, a second rotating shaft connected between the second fixing frame and the lower die, and a second rotating driving device for driving the second rotating gear to rotate; the second rotating gear is sleeved on the second rotating shaft, the second rotating shaft is in rotating connection with the second fixing frame, and the second rotating shaft is in fixed connection with the lower die.
Further, the first rotary driving device comprises a first rack meshed with the first rotary gear, a first sliding rail connected with the first rack in a sliding manner, and a first reciprocating driving mechanism for driving the first rack to be far away from or close to the first rotary gear; the first sliding rail is connected to one side of the upper die;
The second rotation driving device comprises a second rack meshed with the second rotation gear, a second sliding rail connected with the second rack in a sliding manner, and a second reciprocating driving mechanism for driving the second rack to be far away from or close to the second rotation gear; the second sliding rail is connected to the other side of the upper die.
Further, the first rack has a first end proximal to the upper die and a second end distal to the upper die; the second rack is provided with a third end close to the upper die and a fourth end far away from the upper die;
The first reciprocating driving mechanism comprises a first upper magnetic attraction piece arranged on the first end, a first lower magnetic attraction piece arranged on the second end, a second upper magnetic attraction piece arranged on one side of the first upper magnetic attraction piece, and a second lower magnetic attraction piece arranged on one side of the first lower magnetic attraction piece; the first lower magnetic attraction piece and the second lower magnetic attraction piece attract each other, and the first upper magnetic attraction piece and the second upper magnetic attraction piece repel each other;
The second reciprocating driving mechanism comprises a third upper magnetic attraction piece arranged at the third end, a third lower magnetic attraction piece arranged at the fourth end, a fourth upper magnetic attraction piece arranged at one side of the third upper magnetic attraction piece and a fourth lower magnetic attraction piece arranged at one side of the third lower magnetic attraction piece; the third lower magnetic attraction piece and the fourth lower magnetic attraction piece attract each other, and the third upper magnetic attraction piece and the fourth upper magnetic attraction piece repel each other.
Further, the device also comprises a propping device for propping the molded rotor; the propping device comprises a connecting rod, a fifth upper magnetic attraction piece, a fifth lower magnetic attraction piece and a telescopic cylinder for driving the fifth upper magnetic attraction piece to stretch; the connecting rod penetrates through the lower die and is movably connected with the lower die, the two fifth lower magnetic attraction pieces are respectively connected to two ends of the connecting rod and are positioned in a first lower forming cavity and a second lower forming cavity, the upper forming cavity is provided with a first upper accommodating cavity for accommodating the fifth upper magnetic attraction pieces, the first lower forming cavity and the second lower forming cavity respectively form a first lower accommodating cavity for accommodating each fifth lower magnetic attraction piece, and the first upper accommodating cavity and the first lower accommodating cavity are matched with the shapes of the fifth upper magnetic attraction pieces and the fifth lower magnetic attraction pieces; the fifth upper magnetic attraction piece and the fifth lower magnetic attraction piece are arranged in a repulsive mode.
Further, the casting mold has pouring holes; the device also comprises a device for injecting molten metal into the pouring hole.
Further, the injection device comprises an injection head and a storage injection gun; the storage shooting gun is provided with a first feeding hole and a first discharging hole, and the injection head is connected between the first discharging hole and the pouring hole.
Further, the injection head comprises an injection head main body connected with the first discharge hole, a guide rod and a fixing device for connecting the guide rod to the injection head main body; the injection head main body is provided with a first accommodating hole which is communicated with the first discharge hole and is matched with the first discharge hole to accommodate the guide rod in a sliding manner, and the first accommodating hole is provided with a fifth end corresponding to the first discharge hole and a sixth end which is positioned at the other end and corresponds to the fixing device; the fixing device is provided with a second accommodating hole for the guide rod to pass through; the material guide rod comprises a first corresponding section corresponding to the first accommodating hole and a second corresponding section corresponding to the second accommodating hole, and a material guide hole is formed in the material guide rod; the guide hole comprises a first section of material hole and a second section of material hole, the first section of material hole extends from the first corresponding section to the end part of the second corresponding section, the first section of material hole is provided with a feeding end corresponding to the first corresponding section and a discharging end corresponding to the second corresponding section, and the second section of material hole comprises at least one through hole which is communicated with the feeding end to the peripheral surface of the first corresponding section; the guide rod is provided with an elastic retaining device which elastically retains the guide rod and has a movement trend from the first accommodating hole to the second accommodating hole; the through holes gradually incline from the circumferential surface of the first corresponding section to the feeding end from the first corresponding section to the second corresponding section.
(III) beneficial effects
The beneficial effects of the invention are as follows:
after the lifting device drives the upper die to move downwards to enable the upper die and the lower die to be clamped, the upper forming cavity and the first lower forming cavity form a closed forming cavity, then molten metal is poured into the forming cavity, after the molten metal is formed, the lifting device drives the upper die to move upwards, the turnover device drives the lower die to turn over 180 degrees, the second lower forming cavity faces upwards, at the moment, the lifting device drives the upper die to move downwards and the lower die to clamp, the upper forming cavity and the second lower forming cavity form a closed forming cavity, at the moment, a downwards formed product can be demolded and falls downwards, and the casting process is continued in the forming cavity, so that the demolding and forming processes of the product can be synchronously carried out, and the production efficiency of the product is greatly improved.
The setting of the propping device improves the demoulding effect; when the molded first lower molding cavity is turned over for 180 degrees and then is downward, the upper molding cavity and the second lower molding cavity are clamped to form a sealed molding cavity, at the moment, the telescopic cylinder drives the fifth upper magnetic attraction piece to move downward, and under the action of repulsive force, the fifth lower magnetic attraction piece in the second lower molding cavity drives the connecting rod to move downward, so that a product in the first lower molding cavity is propped against and demolded; the fifth upper magnetic attraction piece is attached to the first lower accommodating cavity by repulsive force of the fifth lower magnetic attraction piece, and after the telescopic cylinder drives the fifth upper magnetic attraction piece to move upwards to attach to the first upper accommodating cavity, the sealed forming cavity forms a shape required by product forming.
Under the initial state of the injection head, the elastic retaining device keeps the guide rod to have a trend of moving from the first accommodating hole to the second accommodating hole, so that the second section of the guide hole is blocked corresponding to the first accommodating hole, and at the moment, the guide hole of the guide rod cannot be fed and guide pouring is carried out. In the in-service use process, the guide rod is connected with the pouring hole of the casting mold, and the storage shooting gun conveys molten metal liquid to the first end of the first accommodating hole. When pouring is needed, the injection head is pushed towards the direction of the casting mould, so that the second section of material hole is communicated with the first discharge hole, then molten metal liquid is injected into the forming cavity of the casting mould through the injection head at one time through the storage injection gun, and particularly the molten metal liquid enters from the second section of material hole and directly enters into the forming cavity through the pouring hole through the first section of material hole; when the injection head is stopped to apply force, the elastic retaining device continuously keeps the guide rod to have a trend of moving from the first accommodating hole to the second accommodating hole, so that the second section of the guide hole is blocked corresponding to the first accommodating hole, and at the moment, the guide hole of the guide rod cannot feed and conduct guide pouring, and waste is avoided.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic perspective view of a lower mold according to the present invention;
FIG. 3 is a schematic cross-sectional view of the lower mold of the present invention;
Fig. 4 is a schematic cross-sectional view of the die casting head of the present invention.
[ Reference numerals description ]
The upper die 1, the lower die 2, the lifting device 3, the turning device 4, the first lower molding chamber 21, the second lower molding chamber 22, the first turning mechanism 41, the second turning mechanism 42, the first fixing frame 411, the first rotating gear 412, the first rotating shaft 413, the first rotating driving device 414, the first rack a1, the first slide rail a2, the first reciprocating driving mechanism a3, the first upper magnetic attraction piece a31, the first lower magnetic attraction piece a32, the second upper magnetic attraction piece a33, the second lower magnetic attraction piece a34, the abutting device 5, the connecting rod 51, the fifth lower magnetic attraction piece 52, the telescopic cylinder 53, the first lower accommodating chamber 211, the buffer device 6, the buffer part 61, the moving device 62, the casting hole c1, the injection head 8, the first discharge port 9, the injection head main body 81, the guide rod 82, the fixing device 83, the second accommodating hole 831, the first corresponding section 821, the second corresponding section 822, the guide hole 823, the first section 8231, the second section hole 8232, the second section hole 824, and the elastic holding device b1.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Referring to fig. 1 to 4, the present invention provides a casting device for an inner cylinder of a steam turbine, which includes a casting mold for casting a rotor; the casting mold comprises an upper mold 1, a lower mold 2 matched with the upper mold 1, a lifting device 3 for driving the upper mold 1 to ascend, and a turnover device 4 for driving the lower mold 2 to turn over; the lower surface of the upper die 1 forms an upper molding cavity; the upper surface of the lower mold 2 forms a first lower molding chamber 21, and the lower surface of the lower mold 2 forms a second lower molding chamber.
In actual production process, after lifting device 3 drives upper mould 1 to move down and makes upper mould 1 and lower mould 2 compound die, go up shaping cavity and first shaping cavity 21 formation inclosed shaping cavity, later pour molten metal to shaping cavity in, after waiting to shape, lifting device 3 drives upper mould 1 to move up, turning device 4 drives lower mould 2 and overturns 180, make second shaping cavity up, lifting device 3 again drives upper mould 1 and lower mould 2 compound die this moment, upper shaping cavity and second shaping cavity formation inclosed shaping cavity, the fashioned product of downward at this moment can the drawing of patterns, drop down, form the cavity and continue to pour the process, make the process of product drawing of patterns and shaping can go on in step, the production efficiency of product has been improved greatly. Specifically, the upper die 1 and the lower die 2 are provided with guide posts and guide sleeves which are mutually matched and guided so as to improve the stability of the casting process. More specifically, the lifting device 3 includes an air cylinder.
Specifically, the turning device 4 includes a first turning mechanism 41 and a second turning mechanism 42 that are provided separately on both sides of the casting mold. The lower die 2 is driven to turn 180 degrees through the first turning mechanism 41 and the second turning mechanism 42, and meanwhile stability of the turning process can be guaranteed through the arrangement of the lower die on two sides of the die.
Specifically, the first tilting mechanism 41 includes a first fixing frame 411, a first rotation gear 412, a first rotation shaft 413 connected between the first fixing frame 411 and the lower die 2, and a first rotation driving device 414 that drives the first rotation gear 412 to rotate; the first rotating gear 412 is sleeved on the first rotating shaft 413, the first rotating shaft 413 is in rotating connection with the first fixing frame 411, and the first rotating shaft 413 is in fixed connection with the lower die 2. The second turnover mechanism 42 comprises a second fixed frame, a second rotation gear, a second rotating shaft connected between the second fixed frame and the lower die 2, and a second rotation driving device for driving the second rotation gear to rotate; the second rotating gear is sleeved on the second rotating shaft, the second rotating shaft is in rotating connection with the second fixing frame, and the second rotating shaft is in fixed connection with the lower die 2. Specifically, the first rotation driving device 414 includes a first rack a1 engaged with the first rotation gear 412, a first slide rail a2 slidably connected to the first rack a1, and a first reciprocating driving mechanism a3 driving the first rack a1 away from or close to the first rotation gear 412; the first slide rail a2 is connected to one side of the upper die 1; the second rotation driving device comprises a second rack meshed with the second rotation gear, a second sliding rail connected with the second rack in a sliding manner, and a second reciprocating driving mechanism for driving the second rack to be far away from or close to the second rotation gear; the second slide rail is connected to the other side of the upper die 1. Specifically, the first rack a1 has a first end close to the upper die 1 and a second end far from the upper die 1; the second rack has a third end close to the upper die 1 and a fourth end far from the upper die 1; the first reciprocating driving mechanism a3 comprises a first upper magnetic attraction piece a31 arranged on the first end, a first lower magnetic attraction piece a32 arranged on the second end, a second upper magnetic attraction piece a33 arranged on one side of the first upper magnetic attraction piece a31, and a second lower magnetic attraction piece a34 arranged on one side of the first lower magnetic attraction piece a 32; the first lower magnetic attraction piece a32 and the second lower magnetic attraction piece a34 attract each other, and the first upper magnetic attraction piece a31 and the second upper magnetic attraction piece a33 repel each other; the second reciprocating driving mechanism comprises a third upper magnetic attraction piece arranged at the third end, a third lower magnetic attraction piece arranged at the fourth end, a fourth upper magnetic attraction piece arranged at one side of the third upper magnetic attraction piece and a fourth lower magnetic attraction piece arranged at one side of the third lower magnetic attraction piece; the third lower magnetic attraction piece and the fourth lower magnetic attraction piece attract each other, and the third upper magnetic attraction piece and the fourth upper magnetic attraction piece repel each other.
When the upper die 1 is positioned above, the first upper magnetic attraction piece a31 and the second upper magnetic attraction piece a33 are homopolar and mutually exclusive, the third upper magnetic attraction piece and the fourth upper magnetic attraction piece are homopolar and mutually exclusive, so that the first rack a1 moves on the first sliding rail a2 and moves to a matching station capable of being mutually meshed with the first rotating gear 412, and similarly, the second rack moves on the second sliding rail and moves to a matching station capable of being mutually meshed with the second rotating gear; when the lifting device 3 drives the upper die 1 to move downwards, the first rack a1 is meshed with the first rotating gear 412, the second rack is meshed with the second rotating gear, so that the lower die 2 is turned 180 degrees, the upper die 1 continues to move downwards until the upper die 1 is attached to the lower die 2 to form a sealed forming cavity, at the moment, the second lower magnetic attraction piece a34 adsorbs the first lower magnetic attraction piece a32, so that the first rack a1 moves on the first sliding rail a2 in a direction away from the first rotating gear 412, and the first rack a1 and the first rotating gear 412 are in a non-meshing station; the fourth lower magnetic attraction piece adsorbs the third lower magnetic attraction piece, make the second rack move towards the direction of keeping away from the second rotation gear on the second slide rail, make second gear and second rotation gear be in non-meshing station, after the product is in the shaping cavity shaping, elevating gear 3 drive goes up mould 1 and rises, can not interfere lower mould 2 this moment, after last mould 1 rises to the preset position, first rack a1 and second rack reset, the process of upset lower mould 2 after the repeated lower mould 2 moves down. More specifically, the sliding fit position of the first rack a1 and the first sliding rail a2 is provided with balls, and the sliding fit position of the second rack and the second sliding rail is provided with balls, so that the sliding fluency is improved.
Specifically, in order to improve the demolding effect, the device further comprises a propping device 5 for propping the molded rotor; the propping device 5 comprises a connecting rod 51, a fifth upper magnetic attraction piece, a fifth lower magnetic attraction piece 52 and a telescopic cylinder 53 for driving the fifth upper magnetic attraction piece to stretch; the two fifth lower magnetic attraction pieces 52 are provided, the connecting rod 51 penetrates through the lower die and is movably connected with the lower die, the two fifth lower magnetic attraction pieces 52 are respectively connected to two ends of the connecting rod 51 and are positioned in the first lower forming cavity 21 and the second lower forming cavity, the upper forming cavity is provided with a first upper accommodating cavity for accommodating the fifth upper magnetic attraction pieces, the first lower forming cavity 21 and the second lower forming cavity respectively form a first lower accommodating cavity 211 for accommodating each fifth lower magnetic attraction piece 52, and the first upper accommodating cavity and the first lower accommodating cavity 211 are matched with the shapes of the fifth upper magnetic attraction pieces and the fifth lower magnetic attraction pieces 52; the fifth upper magnetic attraction member and the fifth lower magnetic attraction member 52 are disposed so as to repel each other. The abutting device 5 is arranged, so that the demolding effect is improved; when the molded first lower molding cavity 21 is turned over for 180 degrees and then is downward, the upper molding cavity and the second lower molding cavity are clamped to form a sealed molding cavity, at the moment, the telescopic cylinder 53 drives the fifth upper magnetic attraction piece to move downward, and under the action of repulsive force, the fifth lower magnetic attraction piece 52 in the second lower molding cavity drives the connecting rod 51 to move downward, so that a product in the first lower molding cavity 21 is ejected by propping against the die; the fifth upper magnetic attraction piece is repulsive to the fifth lower magnetic attraction piece 52, so that the fifth lower magnetic attraction piece 52 is attached to the first lower accommodating cavity 211, and after the telescopic cylinder 53 drives the fifth upper magnetic attraction piece to move upwards to attach to the first upper accommodating cavity, the closed forming cavity forms a shape required by product forming.
In particular, in order to avoid damage after the product is demolded, a buffer device 6 is also included under the lower die 2; the buffer device 6 includes a buffer portion 61, and a moving device 62 that drives the buffer portion 61 away from or toward the lower die 2; the moving device 62 includes a moving rod connected to the bottom end of the buffer 61, a moving rail slidably connected to the moving rod, and a moving driving mechanism driving the moving rod to move on the moving rail. Specifically, the movement driving mechanism includes an air cylinder or a rack and pinion that are engaged with each other. When demolding is needed, the moving device 62 drives the buffer part 61 to move to the position right below the lower die 2, so that products fall and are buffered by the buffer part 61, damage is avoided, and defective rate is reduced; when the demolding is completed, the moving device 62 drives the buffer part 61 to move back to the initial position, so that interference with the inverted lower mold 2 is avoided, and the mold is damaged. More specifically, the buffer portion 61 includes an arc buffer surface inclined from top to bottom gradually toward the axis of the die 2, and this arrangement can roll out the range of the demolding through the arc buffer surface, avoid stacking the products at the demolding position, and avoid the damage of collision after demolding of each product.
Specifically, the casting mold has pouring holes c1; and a shot device 7 for injecting molten metal into the casting hole c 1. Specifically, the injection device 7 comprises an injection head 8 and a storage injection gun; the storage shooting gun is provided with a first feed inlet and a first discharge outlet 9, and the injection head 8 is connected between the first discharge outlet 9 and the pouring hole c 1. Specifically, the injection head 8 includes a head main body 81 connected to the first discharge port 9, a guide rod 82, and a fixing device 83 connecting the guide rod 82 to the head main body 81; the injection head main body 81 is provided with a first accommodating hole which is communicated with the first discharge hole 9 and matched with the sliding accommodating guide rod 82, and the first accommodating hole is provided with a fifth end corresponding to the first discharge hole 9 and a sixth end at the other end corresponding to the fixing device 83; the fixing device 83 is formed with a second receiving hole 831 through which the guide rod 82 passes; the material guiding rod 82 comprises a first corresponding section 821 corresponding to the first accommodating hole and a second corresponding section 822 corresponding to the second accommodating hole 831, and the material guiding rod 82 is formed with a material guiding hole 823; the guide hole 823 comprises a first section hole 823 and a second section hole 8232, the first section hole 8231 extends from the first corresponding section 821 to the end of the second corresponding section 822, the first section hole 8231 is provided with a feeding end corresponding to the first corresponding section 821 and a discharging end corresponding to the second corresponding section 822, and the second section hole 8232 comprises at least one through hole b1 which is communicated with the feeding end to the peripheral surface of the first corresponding section 821; the guide rod 82 is provided with an elastic holding device 824 that elastically holds the guide rod 82 with a tendency to move from the first receiving hole toward the second receiving hole 831.
In the actual production process, the injection head 8 is in the initial state, the elastic retaining device 824 keeps the guide rod 82 having a tendency to move from the first accommodating hole toward the second accommodating hole 831, so that the second section of the hole 8232 is blocked corresponding to the first accommodating hole, and the guide hole 823 of the guide rod 82 is not fed and is not used for casting. In actual use, the guide rod 82 is connected to the casting hole c1 of the casting mold, and the storage gun delivers molten metal liquid to the first end of the first accommodation hole. When pouring is needed, the injection head 8 is pushed towards the direction of the casting mold, so that the second section of material hole 8232 is communicated with the first discharge hole 9, then molten metal liquid is injected into a forming cavity of the casting mold through the injection head 8 at one time through the storage injection gun, and particularly the molten metal liquid enters from the second section of material hole 8232 and directly enters into the forming cavity through the pouring hole c1 through the first section of material hole 8231; when the injection head 8 is stopped, the elastic holding device 824 keeps the guide rod 82 moving from the first accommodating hole toward the second accommodating hole 831, so that the second section of the guide hole 8232 is blocked corresponding to the first accommodating hole, and the guide hole 823 of the guide rod 82 is not fed and is used for guiding and pouring, thereby avoiding waste. Specifically, the resilient retaining means 824 comprises a spring.
The through hole b1 is gradually inclined from the circumferential surface of the first corresponding section 821 to the feed end in the direction from the first corresponding section 821 to the second corresponding section 822. In the actual use process, after the second section material hole 8232 is exposed from the first end of the first accommodating hole and is communicated with the discharge hole of the storage shooting gun, the metal liquid can enter the first section material hole 8231 through the through hole b1 of the second section material hole 8232, the metal liquid cannot generate excessive speed change in the process of entering the first section material hole 8231 through the second section material hole 8232, the straightness of the metal liquid flowing is further improved, and the resistance is reduced.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a steam turbine inner cylinder casting device which characterized in that: a casting mold including a casting rotor; the casting mold comprises an upper mold, a lower mold matched with the upper mold, a lifting device for driving the upper mold to rise and a turnover device for driving the lower mold to turn over; the lower surface of the upper die forms an upper forming cavity; the upper surface of the lower die forms a first lower forming cavity, and the lower surface of the lower die forms a second lower forming cavity;
the turnover device comprises a first turnover mechanism and a second turnover mechanism which are respectively arranged at two sides of the casting mold;
the first turnover mechanism comprises a first fixed frame, a first rotating gear, a first rotating shaft connected between the first fixed frame and the lower die, and a first rotating driving device for driving the first rotating gear to rotate; the first rotating gear is sleeved on the first rotating shaft, the first rotating shaft is in rotating connection with the first fixing frame, and the first rotating shaft is fixedly connected with the lower die;
The second turnover mechanism comprises a second fixing frame, a second rotating gear, a second rotating shaft connected between the second fixing frame and the lower die, and a second rotating driving device for driving the second rotating gear to rotate; the second rotating gear is sleeved on the second rotating shaft, the second rotating shaft is in rotating connection with the second fixing frame, and the second rotating shaft is fixedly connected with the lower die;
The device also comprises a propping device for propping the molded rotor; the propping device comprises a connecting rod, a fifth upper magnetic attraction piece, a fifth lower magnetic attraction piece and a telescopic cylinder for driving the fifth upper magnetic attraction piece to stretch; the connecting rod penetrates through the lower die and is movably connected with the lower die, the two fifth lower magnetic attraction pieces are respectively connected to two ends of the connecting rod and are positioned in a first lower forming cavity and a second lower forming cavity, the upper forming cavity is provided with a first upper accommodating cavity for accommodating the fifth upper magnetic attraction pieces, the first lower forming cavity and the second lower forming cavity respectively form a first lower accommodating cavity for accommodating each fifth lower magnetic attraction piece, and the first upper accommodating cavity and the first lower accommodating cavity are matched with the shapes of the fifth upper magnetic attraction pieces and the fifth lower magnetic attraction pieces; the fifth upper magnetic attraction piece and the fifth lower magnetic attraction piece are arranged in a repulsive mode.
2. The steam turbine inner cylinder casting apparatus as defined in claim 1, wherein: the first rotary driving device comprises a first rack meshed with the first rotary gear, a first sliding rail connected with the first rack in a sliding manner, and a first reciprocating driving mechanism for driving the first rack to be far away from or close to the first rotary gear; the first sliding rail is connected to one side of the upper die;
The second rotation driving device comprises a second rack meshed with the second rotation gear, a second sliding rail connected with the second rack in a sliding manner, and a second reciprocating driving mechanism for driving the second rack to be far away from or close to the second rotation gear; the second sliding rail is connected to the other side of the upper die.
3. A steam turbine inner cylinder casting apparatus as defined in claim 2, wherein: the first rack has a first end near the upper die and a second end far from the upper die; the second rack is provided with a third end close to the upper die and a fourth end far away from the upper die;
The first reciprocating driving mechanism comprises a first upper magnetic attraction piece arranged on the first end, a first lower magnetic attraction piece arranged on the second end, a second upper magnetic attraction piece arranged on one side of the first upper magnetic attraction piece, and a second lower magnetic attraction piece arranged on one side of the first lower magnetic attraction piece; the first lower magnetic attraction piece and the second lower magnetic attraction piece attract each other, and the first upper magnetic attraction piece and the second upper magnetic attraction piece repel each other;
The second reciprocating driving mechanism comprises a third upper magnetic attraction piece arranged at the third end, a third lower magnetic attraction piece arranged at the fourth end, a fourth upper magnetic attraction piece arranged at one side of the third upper magnetic attraction piece and a fourth lower magnetic attraction piece arranged at one side of the third lower magnetic attraction piece; the third lower magnetic attraction piece and the fourth lower magnetic attraction piece attract each other, and the third upper magnetic attraction piece and the fourth upper magnetic attraction piece repel each other.
4. The steam turbine inner cylinder casting apparatus as defined in claim 1, wherein: the casting mold is provided with a pouring hole; the device also comprises a device for injecting molten metal into the pouring hole.
5. The steam turbine inner cylinder casting apparatus as defined in claim 4, wherein: the injection device comprises an injection head and a storage injection gun; the storage shooting gun is provided with a first feeding hole and a first discharging hole, and the injection head is connected between the first discharging hole and the pouring hole.
6. The steam turbine inner cylinder casting apparatus as defined in claim 5, wherein: the injection head comprises an injection head main body connected with the first discharge hole, a guide rod and a fixing device for connecting the guide rod to the injection head main body; the injection head main body is provided with a first accommodating hole which is communicated with the first discharge hole and is matched with the first discharge hole to accommodate the guide rod in a sliding manner, and the first accommodating hole is provided with a fifth end corresponding to the first discharge hole and a sixth end which is positioned at the other end and corresponds to the fixing device; the fixing device is provided with a second accommodating hole for the guide rod to pass through; the material guide rod comprises a first corresponding section corresponding to the first accommodating hole and a second corresponding section corresponding to the second accommodating hole, and a material guide hole is formed in the material guide rod; the guide hole comprises a first section of material hole and a second section of material hole, the first section of material hole extends from the first corresponding section to the end part of the second corresponding section, the first section of material hole is provided with a feeding end corresponding to the first corresponding section and a discharging end corresponding to the second corresponding section, and the second section of material hole comprises at least one through hole which is communicated with the feeding end to the peripheral surface of the first corresponding section; the guide rod is provided with an elastic retaining device which elastically retains the guide rod and has a movement trend from the first accommodating hole to the second accommodating hole;
the through holes gradually incline from the circumferential surface of the first corresponding section to the feeding end from the first corresponding section to the second corresponding section.
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| CN202410322956.7A CN117920972B (en) | 2024-03-21 | 2024-03-21 | Casting device for inner cylinder of steam turbine |
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| CN202410322956.7A CN117920972B (en) | 2024-03-21 | 2024-03-21 | Casting device for inner cylinder of steam turbine |
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| CN117920972B (en) | 2024-07-12 |
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