Shell washing device for precision casting integral turbine disc

Abstract

The utility model discloses a shell washing device for a precision casting integral turbine disc, which is used for washing an inner cavity of a mold shell of the precision casting integral turbine disc and comprises a washing trolley, a lifting plate and a washing system, the lifting plate is mounted below an upper bedplate at the top of the washing trolley in an up-down lifting manner, and the washing system is used for washing the inner cavity of the mold shell which is reversely buckled and supported on the upper bedplate. The flushing system comprises a water inlet pipe network arranged on the lifting plate, a plurality of vertically-arranged flushing rods and sprayers connected to the top ends of the flushing rods. The water inlet pipe network is communicated with an external pressure water supply system used for supplying pressure water, the lower end of the flushing rod is communicated with the water inlet pipe network, and the opposite upper end of the flushing rod upwards penetrates through the upper platen and then extends into an inner cavity of the mold shell in the axial direction. The shell washing device is simple in overall structure and low in manufacturing cost, the internal space of each blade can be washed cleanly and thoroughly, a plurality of mold shells can be washed at the same time, and therefore the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of investment casting of turbine disks, and particularly to a device for cleaning the shell of an integrally investment-cast turbine disk. Background Technique

[0002] The turbine disk is the part in an aero-engine that bears the largest thermal load and mechanical load, and is one of the key components of an aero-engine. The integrally turbine disk is mainly produced by precision casting process. Precision casting is a special casting process that uses a precision mold to inject a high-precision wax pattern. After multiple times of slurry coating and sand sprinkling, a shell with a certain strength is formed. After removing the wax pattern inside the shell, liquid metal is poured to form the final turbine disk casting. Therefore, the internal cleanliness of the shell directly affects the quality of the final turbine disk casting.

[0003] Currently, the cleaning method for the shell is: filling the mold shell with water, then shaking the mold shell for several minutes, and then quickly pouring out the water into a water basin, and repeating the above operations several times. Finally, check whether there is dirt inside the mold shell.

[0004] This cleaning method can only clean the redundant substances that can move freely inside the mold shell, and cannot effectively clean the internal space of each blade; and during the water injection process, it is easy to bring external redundant substances into the blade interior and then cannot be discharged. During the water pouring process, the redundant substances with a lighter density float up and stick to the inner wall of the mold shell and cannot be washed out; each mold shell needs to be cleaned more than 5 times, with low efficiency, and repeatedly turning the mold shell easily brings the floating sand on the surface into the inner cavity. Content of the Utility Model

[0005] The utility model provides a device for cleaning the shell of an integrally investment-cast turbine disk to solve the technical problems existing in the existing cleaning method, such as being unable to effectively clean the internal space of each blade, some redundant substances generated during flushing cannot be discharged, the flushing efficiency is low, and the labor intensity of workers is high.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A device for cleaning the shell of an integrally investment-cast turbine disk is used to flush the inner cavity of the mold shell of the integrally investment-cast turbine disk. The shell cleaning device includes: a flushing trolley, a lifting plate vertically installed under the upper platen at the top of the flushing trolley, and a flushing system for flushing the inner cavity of the mold shell that is inversely supported on the upper platen; the flushing system includes a water inlet pipe network arranged on the lifting plate, a plurality of vertically arranged flushing rods, and nozzles connected to the tops of the respective flushing rods; the water inlet pipe network is communicated with an external pressure water supply system for supplying pressure water, the lower end of the flushing rod is communicated with the water inlet pipe network, and its opposite upper end penetrates through the upper platen upward and extends axially into the inner cavity of the mold shell.

[0008] Further, the mold shell includes a sprue, a riser, and a wheel-shaped shell that are sequentially arranged along the axial direction and are connected; the mold shell is reversely supported on the upper platen through the sprue; after the flushing rod extends into the sprue, it continues to rise under the drive of the lifting plate into the inner cavity of the wheel-shaped shell.

[0009] Further, positioning bayonets for positioning are provided on the upper platen corresponding to each flushing rod, and the positioning bayonets are communicated with an externally provided flushing water recovery system for recovering flushing water; the mold shell is positioned and clamped in the positioning bayonets through the sprue to define the relative positions of the mold shell and the corresponding flushing rods.

[0010] Further, the positioning bayonets are square-shaped and are formed by enclosing four positioning rods fixed on the upper surface of the upper platen; the upper platen is a hollow box-shaped structure, and water outlet holes are provided in a penetrating manner on the upper surface corresponding to each positioning bayonet, so that the flushing water falls into the inner cavity of the upper platen through the water outlet holes, and the inner cavity of the upper platen is communicated with the flushing water recovery system to discharge the flushing water externally.

[0011] Further, the positioning bayonets are square-shaped and are formed by concave processing on the upper surface of the upper platen; a water outlet is also provided in a penetrating manner on the bottom plate of the positioning bayonet, and the water outlet is communicated with the flushing water recovery system.

[0012] Further, the precision casting integral turbine disk mold shell flushing device further includes a plurality of guide seats arranged in one-to-one correspondence with the plurality of flushing rods; the guide seats are fixedly connected to the lower surface of the upper platen, and the flushing rods sequentially pass through the guide seats and the upper platen and then extend into the mold shell.

[0013] Further, the water inlet pipe network includes water inlet branch pipes that are criss-crossed and communicated and arranged on the lifting plate, and a water inlet hose communicated with the water inlet branch pipes; the water inlet end of the water inlet hose extends out of the flushing trolley and is used to connect to a pressure water supply system; the bottom ends of the plurality of flushing rods are communicated with the water inlet branch pipes at corresponding positions, and a switching valve is provided at the connection between each flushing rod and the water inlet branch pipe and at the connection between the water inlet hose and the water inlet branch pipe.

[0014] Further, the precision casting integral turbine disk mold shell flushing device further includes a lifting drive mechanism for driving the lifting plate to move up and down. The lifting drive mechanism includes: a mounting support fixed on one side of the upper platen, a drive rod rotatably passing through the mounting support, a drive gear fixedly installed on the outer circle of the inner extension end of the drive rod extending into the flushing trolley, and a drive rack vertically arranged and meshing with the drive gear; the drive rack vertically passes through the lifting plate and is fixed to the lifting plate, and the upper end of the drive rack is meshed and connected to the drive gear.

[0015] Further, scale lines are provided on the drive rack along its length direction for marking its up and down lifting height.

[0016] Furthermore, the flushing trolley includes a support frame, an upper table plate fixedly supported on the top of the support frame, and multiple groups of rolling wheels connected to the bottom corners of the support frame; the flushing trolley is supported on the workshop floor by multiple groups of rolling wheels.

[0017] The utility model has the following beneficial effects:

[0018] The overall structure of the shell washing device of the utility model is simple and the preparation cost is low; before the improvement, the inside of the mold shell was cleaned by manually injecting water and shaking the mold shell to remove the excess substances inside the mold shell. After the improvement, only the turbine disk mold shell needs to be placed on the shell washing device of the new type, and then after opening the flushing water supply system, the flushing water finally sprays into the inside of the mold shell through the pipeline of the flushing system for cleaning, achieving the purpose of automatically cleaning the inside of the mold shell. Not only is the flushing operation convenient, but also the inside of the mold shell can be flushed under pressure through the pressure of the flushing water, and the internal space of each blade can be flushed. The flushing is clean and thorough, and the excess substances can be discharged outwards in time along with the flushing water. At the same time, the labor intensity of workers can be effectively reduced, and the mold shell can be flushed in place at one time without repeated turning, thereby reducing the risk of foreign dirt entering the mold shell and improving the work efficiency. It can also wash multiple mold shells at the same time, thereby further improving the work efficiency.

[0019] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the utility model. Description of the Drawings

[0020] The drawings constituting a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0021] Figure 1 is a schematic spatial structure diagram of the precision casting integral turbine disk shell washing device of the preferred embodiment of the utility model;

[0022] Figure 2 is Figure 1 the front view structure diagram of

[0023] Figure 3 is Figure 1 the left view structure diagram of

[0024] Figure 4 is Figure 1 the top view structure diagram of

[0025] Legend Explanation:

[0026] 10. Flushing trolley; 101. Positioning bayonet; 102. Water outlet hole; 11. Upper table plate; 12. Support frame; 13. Rolling wheel; 14. Pusher.

[0027] 20. Lifting plate

[0028] 30. Flushing system; 31. Water inlet pipe network; 311. Water inlet branch pipe; 312. Water inlet hose; 313. On-off valve; 314. Quick connector; 32. Flushing rod; 33. Sprayer

[0029] 41. Gate; 43. Disc-shaped shell

[0030] 50. Lifting drive mechanism; 51. Mounting support; 52. Drive rod; 54. Drive rack; 55. Drive handwheel

[0031] 60. Guide seat Detailed implementation mode

[0032] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the following.

[0033] Refer to Figure 1 , a preferred embodiment of the present invention provides a shell washing device for a precision-cast integral turbine disk, which is used to wash the inner cavity of the mold shell of the precision-cast integral turbine disk. The shell washing device includes: a flushing trolley 10, a lifting plate 20 vertically installed under the upper plate 11 at the top of the flushing trolley 10, and a flushing system 30 for flushing the inner cavity of the mold shell reversely supported on the upper plate 11. The flushing system 30 includes a water inlet pipe network 31 arranged on the lifting plate 20, a plurality of vertically arranged flushing rods 32, and sprayers 33 connected to the tops of the flushing rods 32. The water inlet pipe network 31 is communicated with an external pressure water supply system for supplying pressure water. The lower end of the flushing rod 32 is communicated with the water inlet pipe network 31, and its opposite upper end penetrates through the upper plate 11 and extends axially into the inner cavity of the mold shell.

[0034] When using the shell washing device of the present invention to wash the inner cavity of the mold shell of the precision-cast integral turbine disk, first, connect the water inlet pipe network 31 to the externally provided pressure water supply system, then move the flushing trolley 10 into place and brake it, then lower the lifting plate 20, thereby driving the flushing rod 32 to lower for the positioning and support of the mold shell, then place the mold shell reversely on the upper plate 11 of the flushing trolley 10, then raise the lifting plate 20 again, thereby driving the flushing rod 32 to rise. After the flushing rod 32 reaches the preset height, stop it, then open the water inlet pipe network 31, and the flushing water is evenly sprayed onto each corner of the inner cavity of the mold shell through the flushing rod 32 and the sprayer 33 to wash out the dirt inside the mold shell. Finally, after flushing for several minutes, lower the lifting plate 20 to drive the flushing rod 32 to lower to remove the mold shell, and thus complete the shell washing of the mold shell.

[0035] The overall structure of the shell washing device of the present utility model is simple and the preparation cost is low. Before the improvement, the excess substances inside the mold shell were cleaned by manually injecting water and shaking the mold shell. After the improvement, only the turbine disk mold shell needs to be placed on the novel shell washing device, and then after opening the flushing water supply system, the flushing water finally sprays into the inside of the mold shell through the pipeline of the flushing system 30 for cleaning, achieving the purpose of automatically cleaning the inside of the mold shell. Not only is the flushing operation convenient, but also the inside of the mold shell can be flushed under pressure through the pressure of the flushing water, and the internal space of each blade can be flushed. The flushing is clean and thorough, and the excess substances can be discharged outwards in time along with the flushing water. At the same time, the labor intensity of workers can be effectively reduced, and the mold shell can be flushed in place at one time without repeated turning, thereby reducing the risk of foreign dirt entering the mold shell and improving the work efficiency. It can also wash multiple mold shells at the same time, thereby further improving the work efficiency.

[0036] Optionally, as Figure 1 shown, the mold shell includes a sprue 41, a riser ([ Figure 1 the riser is omitted in the figure to show the condition of the flushing rod 32 inside the mold shell) and a wheel disc mold shell 43 that are arranged in sequence along the axis and are connected. The mold shell is reversely supported on the upper platen 11 through the sprue 41. After the flushing rod 32 extends into the sprue 41, it continues to rise under the drive of the lifting plate 20 into the inner cavity of the wheel disc mold shell 43 to effectively clean the internal space of each blade. Preferably, as Figure 1 shown, the nozzle 33 is a rotary nozzle to more fully flush the internal space of each blade under pressure and sufficiently during the rotation process.

[0037] Optionally, as Figure 1 and Figure 4 shown, positioning bayonets 101 for positioning are provided on the upper platen 11 corresponding to each flushing rod 32. The positioning bayonets 101 are communicated with an external flushing water recovery system for recovering flushing water, so as to timely discharge the flushing water generated by flushing from the novel shell washing device. The mold shell is positioned and clamped in the positioning bayonets 101 through the sprue 41 to limit the relative position between the mold shell and the corresponding flushing rod 32; the positioning bayonets 101 are used to clamp and position the mold shell. On the one hand, it prevents the mold shell from moving under pressure during the flushing under pressure, thereby affecting the flushing effect. On the other hand, it is used to limit the relative position between the mold shell and the flushing rod 32 to prevent the flushing rod 32 from damaging the mold shell, and also enables the flushing water to evenly flush the mold shell along the circumferential direction.

[0038] In this optional solution, as Figure 1As shown, a first embodiment of the positioning bayonet 101. The positioning bayonet 101 is square-shaped and is formed by enclosing with four positioning rods fixed on the upper surface of the upper platen 11. The upper platen 11 is a hollow box-shaped structure, and water outlet holes 102 are provided corresponding to each positioning bayonet 101 on its upper surface and penetrate through, so that the flushing water falls into the inner cavity of the upper platen 11 through the water outlet holes 102. The inner cavity of the upper platen 11 is communicated with the flushing water recovery system to discharge the flushing water.

[0039] In this alternative solution, not shown in the figure, a second embodiment of the positioning bayonet 101. The positioning bayonet 101 is square-shaped and is formed by concave processing on the upper surface of the upper platen 11. A through water outlet is also provided on the bottom plate of the positioning bayonet 101, and the water outlet is communicated with the flushing water recovery system.

[0040] Preferably, as Figure 2 shown, the precision-cast integral turbine disk shell washing device further includes a plurality of guide seats 60 corresponding to a plurality of washing rods 32 one by one. The guide seats 60 are fixedly connected to the lower surface of the upper platen 11, and the washing rods 32 sequentially pass through the guide seats 60 and the upper platen 11 and then extend into the mold shell. During operation, the washing rods 32 move up and down in the vertical direction driven by the lifting plate 20. To improve the lifting accuracy of the washing rods 32 and prevent the washing rods 32 from interfering with the mold shell, in this preferred solution, guide seats 60 are added to the lower surface of the upper platen 11, and the washing rods 32 are slidably inserted into the guide seats 60, thereby limiting and guiding the sliding of the washing rods 32 and improving their movement accuracy.

[0041] Optionally, as Figure 1 and Figure 2 shown, the water inlet pipe network 31 includes water inlet branch pipes 311 that are criss-crossed and communicated and arranged on the lifting plate 20, and water inlet hoses 312 that are communicated with the water inlet branch pipes 311. The water inlet end of the water inlet hose 312 extends out of the washing trolley 10 and is used to connect to the pressure water supply system; preferably, as Figure 1 shown, a quick-connect joint 314 for quickly connecting and disassembling with an external pressure water supply system is further provided at the water inlet end of the water inlet hose 312. The bottom ends of the plurality of washing rods 32 are communicated with the corresponding water inlet branch pipes 311, and a switching valve 313 is provided at the connection between each washing rod 32 and the water inlet branch pipe 311 and at the connection between the water inlet hose 312 and the water inlet branch pipe 311 to control the conduction of the corresponding washing rod 32 or the water inlet hose 312 as needed.

[0042] Optionally, as Figure 2 and Figure 3As shown, the precision casting integral turbine disk shell washing device further includes a lifting drive mechanism 50 for driving the lifting plate 20 to move up and down. The lifting drive mechanism 50 includes: a mounting support 51 fixed to one side of the upper platen 11, a drive rod 52 rotatably passing through the mounting support 51, a drive gear fixedly installed on the outer circumference of the inner extension end of the drive rod 52 extending into the washing trolley 10, and a drive rack 54 vertically arranged and meshing with the drive gear. The drive rack 54 vertically penetrates the lifting plate 20 and is fixed to the lifting plate 20, and the upper end of the drive rack 54 is meshed and connected to the drive gear. Preferably, as Figure 3 shown, the lifting drive mechanism 50 further includes a drive handwheel 55 fixed to the outer extension end of the drive rod 52. During operation, hold the drive handwheel 55 and drive it to rotate, thereby causing the drive rod 52 to rotate. When the drive rod 52 rotates, the vertically arranged drive rack 54 is driven to move up and down in the vertical direction through the meshing of the drive gear on it and the drive rack 54, thereby driving the lifting plate 20 to move up and down, and ultimately driving the washing rod 32 to move up and down in the vertical direction.

[0043] Preferably, the drive rack 54 is provided with scale lines arranged along its length direction for marking its up and down lifting height. Thus, the lifting height of the drive rack 54 can be known through the changes of different scales on the drive rack 54 corresponding to the mounting support 51, and then the lifting height of the washing rod 32 can be known. When the drive rack 54 rises to the set scale, the top end of the washing rod 32 is close to the top end of the inner cavity of the disk shell 43, so that the nozzle 33 can effectively wash the inner cavities of each blade. In other embodiments, the scale lines can also be directly arranged along the length extension of the washing rod 32.

[0044] Optionally, as Figure 1 shown, the washing trolley 10 includes a support frame 12, an upper platen 11 fixedly supported on the top of the support frame 12, and multiple groups of rolling wheels 13 connected to the bottom corners of the support frame 12. The washing trolley 10 is supported on the workshop floor through multiple groups of rolling wheels 13. In this optional solution, the support frame 12 is in a square shape, and the number of rolling wheels 13 is four groups, two of which are universal wheels arranged at the front end of the movement of the support frame 12, and the other two are fixed wheels arranged at the rear end of the movement of the support frame 12; the universal wheels are used to self-lock by pressing their brake pads to stabilize the washing trolley 10 after the washing trolley 10 moves into place. Further, as Figure 1 shown, the washing trolley 10 further includes a pusher 14 connected to the top end of the support frame 12.

[0045] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precision casting integral turbine disk shell washing device, characterized in that: Used to flush the inner cavity of the precision-cast integral turbine disk mold shell, the shell washing device includes: A flushing trolley (10), a lifting plate (20) installed below an upper platen (11) on the top of the flushing trolley (10) and capable of being lifted and lowered, and a flushing system (30) for flushing the inner cavity of a mold shell supported upside down on the upper platen (11); The flushing system (30) comprises a water inlet pipe network (31) arranged on the lifting plate (20), a plurality of vertically arranged flushing rods (32), and a spray head (33) connected to the top of each flushing rod (32); The water inlet network (31) is connected to an external pressure water supply system for supplying pressure water. The lower end of the flushing rod (32) is connected to the water inlet network (31), and the upper end thereof passes through the upper platen (11) upward and then extends axially into the inner cavity of the mold shell.

2. The precision casting integral turbine disk shell washing device according to claim 1 is characterized in that: The mold shell comprises a gate (41), a riser and a wheel shell (43) which are sequentially arranged and connected along the axial direction; The mold shell is supported on the upper platen (11) by an inverted buckle through a gate (41); After the flushing rod (32) extends into the gate (41), it continues to rise to the inner cavity of the wheel shell (43) under the drive of the lifting plate (20).

3. The precision casting integral turbine disk shell washing device according to claim 2 is characterized in that: A positioning bayonet (101) for positioning is provided on the upper platform (11) corresponding to each flushing rod (32), and the positioning bayonet (101) is connected to an external flushing water recovery system for recovering flushing water; The mold shell is positioned and clamped in the positioning clamping hole (101) through the gate (41) to define the relative position of the mold shell and the corresponding flushing rod (32).

4. The precision casting integral turbine disk shell washing device according to claim 3 is characterized in that: The positioning bayonet (101) is square and is formed by four positioning rods fixed on the upper surface of the upper platform (11); The upper platform (11) is a hollow box-shaped structure, and a water outlet hole (102) is provided on its upper surface corresponding to each positioning bayonet (101), so that flushing water can fall into the inner cavity of the upper platform (11) through the water outlet hole (102), and the inner cavity of the upper platform (11) is connected to the flushing water recovery system so that the flushing water can be discharged.

5. The precision casting integral turbine disk shell washing device according to claim 3 is characterized in that: The positioning bayonet (101) is square and is formed by inwardly processing the upper surface of the upper platform (11); A water outlet is also provided on the bottom plate of the positioning bayonet (101), and the water outlet is connected to the flushing water recovery system.

6. The precision casting integral turbine disk shell washing device according to claim 1 is characterized in that: The precision-cast integral turbine disk shell washing device also includes a plurality of guide seats (60) arranged one-to-one corresponding to the plurality of washing rods (32); The guide seat (60) is fixedly connected to the lower surface of the upper platen (11), and the flushing rod (32) passes through the guide seat (60) and the upper platen (11) in sequence and then extends into the mold shell.

7. The precision casting integral turbine disk shell washing device according to claim 1 is characterized in that: The water inlet pipe network (31) comprises water inlet branch pipes (311) which are connected in a crisscross pattern and arranged on the lifting plate (20), and A water inlet hose (312) connected to the water inlet branch pipe (311); The water inlet end of the water inlet hose (312) extends out of the flushing trolley (10) and is used to connect to a pressure water supply system; The bottom ends of the plurality of flushing rods (32) are connected to the water inlet branch pipes (311) at corresponding positions, and a switch valve (313) is provided at the connection point between each flushing rod (32) and the water inlet branch pipe (311) and at the connection point between the water inlet hose (312) and the water inlet branch pipe (311).

8. The precision casting integral turbine disk shell washing device according to claim 1 is characterized in that: The precision-cast integral turbine disk shell washing device further comprises a lifting drive mechanism (50) for driving the lifting plate (20) to move up and down, and the lifting drive mechanism (50) comprises: A mounting support (51) fixed to one side of the upper platform (11), a driving rod (52) rotatably inserted into the mounting support (51), a driving gear fixedly mounted on the outer circle of the inner end of the driving rod (52) extending into the washing trolley (10), and a driving rack (54) vertically arranged and meshing with the driving gear for transmission; The driving rack (54) vertically penetrates the lifting plate (20) and is fixed to the lifting plate (20), and the upper end of the driving rack (54) is meshedly connected to the driving gear.

9. The precision casting integral turbine disk shell washing device according to claim 8, characterized in that: The driving rack (54) is provided with scale lines arranged along its length direction for marking its up and down lifting heights.

10. The precision casting integral turbine disk shell washing device according to claim 1, characterized in that: The washing trolley (10) comprises a supporting frame (12), an upper platform (11) fixedly supported on the top of the supporting frame (12), and a plurality of groups of rolling wheels (13) connected to the top corners of the bottom of the supporting frame (12); The flushing trolley (10) is supported on the workshop floor via a plurality of sets of rolling wheels (13).

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