Centrifugal turntable device of induction skull furnace

Abstract

The invention relates to a centrifugal turntable device of an induction skull furnace. A skull furnace mold shell is arranged in a casting cavity; a centrifugal turntable main shaft device is connected below the skull furnace mold shell; a centrifugal turntable brake device is arranged below the centrifugal turntable main shaft device; the centrifugal turntable main shaft device is braked through mechanical friction; the centrifugal turntable driving device is arranged on one side of the centrifugal turntable main shaft device; the rotating power of the motor is transmitted to the centrifugal turntable main shaft device through the belt pulley transmission pair device to rotate, so as to drive the skull furnace mold shell to perform centrifugal casting; the vibration generated by the centrifugal turntable device is isolated from the furnace body by utilizing the soft connection characteristic of the corrugated pipe dust cover, so that the vibration of the whole equipment is obviously reduced, and the problem that the furnace body and a casting mold generate the same strong vibration due to the vibration of the induction skull furnace during centrifugal movement is solved.

Description

Technical Field

[0001] Embodiments of the present invention belong to the technical field of vacuum induction skull melting furnaces, and particularly relate to a centrifugal turntable device for a new type of induction skull melting furnace. Background Art

[0002] A vacuum induction skull melting furnace is a special equipment for melting materials such as titanium and titanium alloys, and reactive refractory metals. It uses the electromagnetic induction principle of an induction coil to heat and melt metal raw materials placed in a water-cooled copper crucible to the melting point (the water-cooled copper crucible is located inside the induction coil). Since the inside of the furnace is in a vacuum state, the metal will not react with oxygen or other gases, thus ensuring the quality and purity of the refractory metal. When the molten liquid reaches the required casting amount, the melting is stopped, the crucible is flipped, and the molten liquid is poured into a mold fixed on a centrifugal disk for centrifugal casting, thereby obtaining various castings with complete shapes and clear contours.

[0003] Due to the large size of the furnace body and the large weight of the mold of the vacuum induction skull melting furnace, obvious vibrations occur during the movement of the entire centrifugal mechanism. Since the centrifugal mechanism and the furnace body are rigidly connected, the vibrations will be transmitted to the furnace body, causing the furnace body and the mold to vibrate strongly as well, which troubles the normal production of the vacuum induction skull melting furnace and affects the product qualification rate. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a centrifugal turntable device for an induction skull melting furnace, which solves the problem that the vibration during centrifugal movement of the induction skull melting furnace causes the furnace body and the mold to vibrate strongly, troubles the normal production of the induction skull melting furnace, and affects the product qualification rate.

[0005] To achieve the above purpose, the embodiments of the present invention design a centrifugal turntable device for an induction skull melting furnace, including:

[0006] A melting and casting cavity;

[0007] An induction skull melting furnace mold shell, which is arranged inside the melting and casting cavity;

[0008] A centrifugal turntable main shaft device, which is connected to the centrifugal turntable main shaft device below the induction skull melting furnace mold shell;

[0009] A centrifugal turntable brake device, which is arranged below the centrifugal turntable main shaft device; it plays a braking role on the centrifugal turntable main shaft device through mechanical friction;

[0010] A centrifugal turntable driving device, which is arranged on one side of the centrifugal turntable main shaft device; it transmits the rotational power of the motor to the centrifugal turntable main shaft device through a pulley transmission pair device to make a rotational movement, driving the induction skull melting furnace mold shell for centrifugal casting.

[0011] Furthermore, in the centrifugal turntable device of the induction skull furnace of the present invention, inside the melting and casting cavity, a melting crucible is connected above the centrifugal turntable main shaft device.

[0012] Furthermore, in the centrifugal turntable device of the induction skull furnace of the present invention, the centrifugal turntable main shaft device further includes:

[0013] A centrifugal turntable, which is arranged below the skull furnace mold shell;

[0014] A centrifugal disk baffle, which is arranged at the upper end of the centrifugal turntable;

[0015] A rotating shaft, with the centrifugal turntable sleeved on the upper end of the rotating shaft;

[0016] A driven pulley, which is fixedly connected to the lower end of the rotating shaft, and the upper end surface of the driven pulley fits with the shaft shoulder at the lower end of the rotating shaft.

[0017] A threaded ring, which is threadedly connected to the threaded section at the lower part of the rotating shaft;

[0018] A cylindrical roller bearing, with the upper end surface of the threaded ring fitting with the lower end surface of the inner ring of the cylindrical roller bearing.

[0019] A double nut, with the lower end surface of the threaded ring fitting with the upper end surface of the double nut; the double nut is threadedly connected to the threaded section at the lower part of the rotating shaft; the double nut and the threaded ring jointly act to transmit an upward fastening force along the rotating shaft to the inner ring of the cylindrical roller bearing.

[0020] A spacer ring, which is fixed on the rotating shaft;

[0021] A cylindrical roller bearing, with the lower end surface of the spacer ring fitting with the upper end surface of the inner ring of the cylindrical roller bearing.

[0022] A spherical roller bearing, with the upper end surface of the spacer ring fitting with the lower end surface of the inner ring of the spherical roller bearing.

[0023] A bearing housing, with the cylindrical roller bearing fixed in the bearing hole at the lower end of the bearing housing.

[0024] A top ring, with the lower end surface of the outer ring of the cylindrical roller bearing fitting with the upper end surface of the top ring; the outer ring of the cylindrical roller bearing is firmly fixed in the bearing hole at the lower end of the bearing housing.

[0025] The cylindrical surface of the inner ring of the cylindrical roller bearing fits with the bearing section cylindrical surface at the lower end of the rotating shaft.

[0026] Spacer ring, the upper end face of the inner ring of the cylindrical roller bearing is in contact with the lower end face of the spacer ring;

[0027] Threaded ring, the lower end face of the inner ring of the cylindrical roller bearing is in contact with the upper end face of the threaded ring, and the inner ring of the cylindrical roller bearing is fastened to the rotating shaft;

[0028] Spacer, the spacer is fixed in the bearing hole at the upper end of the bearing housing; the lower end face of the spacer is in contact with the bottom surface of the bearing hole at the upper end of the bearing housing;

[0029] Self-aligning roller bearing, the upper end face of the spacer is in contact with the lower end face of the outer ring of the self-aligning roller bearing;

[0030] Dust cover mounting plate base, the upper end face of the outer ring of the self-aligning roller bearing is in contact with the lower end face of the dust cover mounting plate base;

[0031] Spacer, the lower end face of the outer ring of the self-aligning roller bearing is in contact with the upper end face of the spacer; the outer ring of the self-aligning roller bearing is firmly clamped in the bearing hole at the upper end of the bearing housing;

[0032] The cylindrical surface of the inner ring of the self-aligning roller bearing is in contact with the bearing shoulder cylindrical surface at the upper end of the rotating shaft;

[0033] Spacer ring, the lower end face of the inner ring of the self-aligning roller bearing is in contact with the upper end face of the spacer ring; the inner ring of the self-aligning roller bearing is fastened to the rotating shaft;

[0034] Upper fixing plate of the bearing housing, the bearing housing is welded to the upper fixing plate of the bearing housing;

[0035] Lower fixing plate of the bearing housing, the bearing housing is fixed on the upper end face of the lower fixing plate of the bearing housing;

[0036] Centrifugal turntable frame, the lower fixing plate of the bearing housing is fixed on the frame mounting plate of the centrifugal turntable frame;

[0037] Top ring, the top ring is fixed in the large hole of the lower fixing plate of the bearing housing, the upper end face of the edge of the top ring is in contact with the lower end face inside the lower fixing plate of the bearing housing, and the top ring is fastened to the lower fixing plate of the bearing housing by circumferentially evenly distributed screws;

[0038] Dust cover mounting plate base, the dust cover mounting plate base is fixed above the rotating shaft;

[0039] The upper fixing plate of the bearing housing, the dust cover mounting plate base is fixed above the upper fixing plate of the bearing housing;

[0040] Dust cover mounting plate, the dust cover mounting plate is fixed above the dust cover mounting plate base;

[0041] A dust cover is fixed above the dust cover mounting plate, and the central axis of the inner hole of the dust cover coincides with the central axis of the inner hole of the dust cover mounting plate;

[0042] A corrugated pipe dust cover is fixed below the dust cover;

[0043] A cavity bottom plate, and the lower end surface of the outer cylindrical ring of the corrugated pipe dust cover is attached to the upper end surface of the cavity bottom plate;

[0044] An upper sealing plate, and the outer cylindrical surface of the lower end of the inner cylindrical ring of the corrugated pipe dust cover is attached to the inner cylindrical surface of the inner hole of the upper sealing plate; the upper end of the inner hole of the corrugated pipe dust cover is sleeved and attached to the outer cylindrical surface of the dust cover mounting plate;

[0045] A lower sealing plate, the upper sealing plate is installed above the lower sealing plate, the central axis of the inner hole of the upper sealing plate coincides with the central axis of the inner hole of the lower sealing plate, the lower end surface of the upper sealing plate is attached to the upper end surface of the lower sealing plate, and the upper sealing plate and the lower sealing plate are fastened together by circumferentially uniformly distributed screws;

[0046] The lower sealing plate is fixedly connected to the casting cavity by welding, and the upper end surface of the outer edge of the lower sealing plate is attached to the lower end surface of the seamless steel pipe at the bottom of the casting cavity; the central axis of the inner hole of the lower sealing plate coincides with the central axis of the inner hole of the seamless steel pipe at the bottom of the casting cavity;

[0047] A second dust-proof structure is formed by surrounding the dust cover mounting plate, the corrugated pipe dust cover, the upper sealing plate, the lower sealing plate, the seamless steel pipe of the casting cavity, and the cavity bottom plate, to prevent dust and sundries in the casting cavity from invading the centrifugal main shaft device.

[0048] Further, in the centrifugal turntable device of the induction skull furnace of the present invention, the centrifugal disc baffle is fixed in the counterbore at the upper end of the centrifugal turntable and is fastened to the rotating shaft by a screw located at the center of the upper end of the rotating shaft;

[0049] The centrifugal turntable is sleeved on the upper end of the rotating shaft; the lower end surface of the centrifugal turntable is attached to the shoulder of the upper end of the rotating shaft and is fastened to the rotating shaft by bolts located on the lower cylindrical ring of the centrifugal turntable;

[0050] Key grooves are provided in the inner hole of the driven pulley and the lower shaft head of the rotating shaft and are connected by a flat key; the driven pulley transmits torque to the rotating shaft through the flat key, and the rotating shaft then transmits the torque to the centrifugal turntable, driving the skull furnace mold shell fixed on the centrifugal turntable to perform a rotational movement for centrifugal casting of the skull furnace;

[0051] The spacer ring transfers a fastening force along the rotation axis downward to the inner ring of the cylindrical roller bearing, and at the same time transfers a fastening force along the rotation axis upward to the inner ring of the spherical roller bearing;

[0052] The outer cylindrical surface of the outer ring of the cylindrical roller bearing fits with the inner cylindrical surface of the bearing hole at the lower end of the bearing housing; the upper end surface of the outer ring of the cylindrical roller bearing fits with the bottom surface of the bearing hole at the lower end of the bearing housing;

[0053] The spherical roller bearing is fixed in the bearing hole at the upper end of the bearing housing; the outer cylindrical surface of the outer ring of the spherical roller bearing fits with the inner cylindrical surface of the bearing hole at the upper end of the bearing housing;

[0054] The upper end surface of the inner ring of the spherical roller bearing fits with the lower end surface of the bearing shoulder at the upper end of the rotating shaft;

[0055] The inner side edge of the lower end surface of the upper fixing plate of the bearing housing fits with the upper end surface of the bearing housing, and the central axis of the inner hole of the upper fixing plate of the bearing housing coincides with the central axis of the inner hole of the bearing housing;

[0056] The central axis of the inner hole of the bearing housing coincides with the central axis of the inner hole of the lower fixing plate of the bearing housing, and the bearing housing and the lower fixing plate of the bearing housing are fixedly connected by welding;

[0057] The lower protruding cylinder of the lower fixing plate of the bearing housing is embedded in the large hole of the frame mounting plate of the centrifugal turntable frame, and the lower end surface of the outer side edge of the lower fixing plate of the bearing housing fits with the upper end surface of the frame mounting plate of the centrifugal turntable frame, and the lower fixing plate of the bearing housing and the centrifugal turntable frame are fastened together by circumferentially evenly distributed screws;

[0058] The central axis of the inner hole of the dust cover mounting plate base coincides with the central axis of the inner hole of the upper fixing plate of the bearing housing; the lower end surface of the flange of the dust cover mounting plate base fits with the upper end surface of the upper fixing plate of the bearing housing, and the dust cover mounting plate base and the upper fixing plate of the bearing housing are fastened together by circumferentially evenly distributed screws;

[0059] The lower surface of the dust cover fits with the upper end surface of the dust cover mounting plate; and the dust cover and the dust cover mounting plate are fastened together by circumferentially evenly distributed screws; the dust cover isolates the melting and casting cavity from the part below the upper shaft end of the rotating shaft; preventing dust and sundries in the melting and casting cavity from invading the centrifugal main shaft device;

[0060] The central axis of the inner hole of the dust cover mounting plate coincides with the central axis of the inner hole of the dust cover mounting plate base; the lower end surface of the dust cover mounting plate fits with the upper end surface of the flange of the dust cover mounting plate base, and the dust cover mounting plate and the dust cover mounting plate base are fastened together by circumferentially evenly distributed screws.

[0061] Further, in the centrifugal turntable device of the induction skull furnace of the present invention, the centrifugal turntable main shaft device further includes:

[0062] A first O-ring seal, which is provided on the lower end face of the upper sealing plate. The first O-ring seal is pressed by the lower sealing plate in an annular groove on the lower end face of the upper sealing plate.

[0063] A second O-ring seal, which is provided on the upper end face of the upper fixing plate of the bearing seat. The second O-ring seal is pressed by the dust cover mounting plate base in an annular groove on the upper end face of the upper fixing plate of the bearing seat.

[0064] A third O-ring seal, which is provided on the upper end face of the dust cover mounting plate base. The third O-ring seal is pressed by the dust cover mounting plate in an annular groove on the upper end face of the dust cover mounting plate base.

[0065] A fourth O-ring seal, which is provided on the outer cylindrical surface of the inner edge of the lower end face of the flange of the dust cover mounting plate base. The fourth O-ring seal is pressed by the upper fixing plate of the bearing seat in an annular groove on the outer cylindrical surface of the inner edge of the lower end face of the flange of the dust cover mounting plate base.

[0066] A pressing ring, which is fixed in the first step downwards from the upper end face of the dust cover mounting plate base; the lower end face of the flange of the pressing ring fits with the first step face downwards from the upper end face of the dust cover mounting plate base, and the pressing ring and the dust cover mounting plate base are fixed by circumferentially evenly distributed screws.

[0067] A sealing spacer ring, which is fixed in the second step downwards from the upper end face of the dust cover mounting plate base; the outer cylindrical surface of the sealing spacer ring fits with the inner cylindrical surface of the second step downwards from the upper end face of the dust cover mounting plate base.

[0068] A sixth O-ring seal, which is arranged below the pressing ring; under the pressing force of the pressing ring, the sixth O-ring seal is pressed in the space surrounded by the pressing ring, the dust cover mounting plate base, the sealing spacer ring and the rotating shaft.

[0069] A fifth O-ring seal, which is arranged below the sealing spacer ring. Under the pressing force of the sealing spacer ring, the fifth O-ring seal is pressed in the space surrounded by the sealing spacer ring, the dust cover mounting plate base and the rotating shaft.

[0070] Further, in the centrifugal turntable device of the induction skull furnace of the present invention, the centrifugal turntable braking device includes:

[0071] The bakelite shoe brake pad is arranged directly below the driven pulley of the centrifugal turntable main shaft device;

[0072] A brake chassis, the lower end face of the bakelite shoe brake pad is attached to the upper end face of the brake chassis;

[0073] The brake pedal support, the brake pedal support is arranged below the brake chassis;

[0074] A small hinge shaft, the small hinge shaft penetrates through the symmetry axis holes on the brake pedal support and the symmetry axis holes on the brake chassis;

[0075] A brake support, the brake support is arranged below the brake pedal support;

[0076] A large hinge shaft, the large hinge shaft penetrates through the symmetry axis holes on the two axle seats in the middle of the bottom of the brake pedal support and the symmetry axis holes on the upper ends of the two side support plates of the brake support;

[0077] An installation and fixing bottom plate, the installation and fixing bottom plate is arranged below the brake support, and the brake support is fixed on the installation and fixing bottom plate by welding;

[0078] A hanging plate, the hanging plate is fixed on the bottom cavity door frame plate of the melting and casting cavity by welding;

[0079] A brake spring, the upper end of the brake spring is hooked in the hanging hole of the hanging plate, and the lower end of the brake spring is hooked in the hanging ear hole on the brake pedal support;

[0080] The braking torque applied to the pedal end of the brake pedal support is transmitted to the brake chassis and the bakelite shoe brake pad through the brake pedal support; the mechanical energy is consumed through the relative friction between the bakelite shoe brake pad and the driven pulley, and the centrifugal turntable main shaft device is braked.

[0081] Furthermore, in the centrifugal turntable device of the induction skull furnace of the present invention, the central axis of the inner cylindrical surface of the bakelite shoe brake pad coincides with the central axis of the inner cylindrical surface of the brake chassis, and the bakelite shoe brake pad and the brake chassis are fastened together by circumferentially uniformly distributed screws;

[0082] Symmetric axis holes are provided on the two symmetric frame edges of the brake pedal support, and symmetric axis holes are provided on the two symmetry axis seats of the brake chassis and are coaxial with the axis holes on the brake pedal support;

[0083] The two symmetric frame edges of the brake pedal support are respectively embedded in the middle of the two symmetry axis seats of the brake chassis;

[0084] The small hinge shaft is fixed on the brake chassis by circlips at both ends of itself;

[0085] The small twisted shaft connects the brake chassis and the brake support pedal, so that the brake chassis and the brake support pedal rotate relative to each other around the small twisted shaft;

[0086] Two symmetrical shaft holes are provided on the upper ends of the support plates on both sides of the brake bracket, and two shaft seats in the middle of the bottom of the brake support pedal are provided with symmetrical shaft holes coaxial with the shaft holes on the brake bracket; the two symmetrical shaft seats in the middle of the bottom of the brake support pedal are embedded in the middle of the upper ends of the support plates on both sides of the brake bracket;

[0087] The large twisted shaft is fixed to the brake bracket through the retaining springs at both ends of the large twisted shaft;

[0088] The large twisted shaft connects the brake support pedal with the brake bracket, so that the brake support pedal rotates relatively around the large twisted shaft;

[0089] A hanging hole is provided on the hanging plate; and a hanging ear is provided on the brake support pedal at a position close to the pedal end.

[0090] Furthermore, in the centrifugal turntable device of the induction shell solidification furnace of the present invention, the centrifugal turntable driving device further includes:

[0091] An asynchronous motor is fixed on one side of the melting and casting cavity above a motor mounting pad;

[0092] The bottom plane of the mounting flange of the asynchronous motor is fitted with the upper end surface of the motor mounting pad; the protruding cylinder on the bottom plane of the mounting flange of the asynchronous motor is embedded in the countersunk hole on the upper end surface of the motor mounting pad, and the bolt holes uniformly distributed circumferentially on the mounting flange of the asynchronous motor are aligned with the bolt holes uniformly distributed circumferentially on the motor mounting pad;

[0093] The motor mounting pad is located above the frame mounting plate of the centrifugal turntable frame;

[0094] The bottom plane of the motor mounting pad is in contact with the upper end surface of the frame mounting plate of the centrifugal turntable frame;

[0095] A driving pulley is mounted on the motor shaft at the lower end of the asynchronous motor;

[0096] V-belts, with two ends of the V-belts respectively inserted into the V-belt grooves of the driving pulley and the driven pulley; the driving pulley transmits the torque to the driven pulley through the V-belts;

[0097] The motor mounting base plate is provided with a motor tensioning block near the side facing the driven pulley. The motor tensioning block is provided with a threaded hole and an adjusting bolt. By changing the protruding length of the adjusting bolt on the motor tensioning block, the distance between the driving pulley and the driven pulley and the tension of the V-belt are adjusted.

[0098] Furthermore, in the centrifugal turntable device of the induction skull furnace of the present invention, the bolt holes evenly distributed in the circumferential direction on the motor mounting base plate are respectively aligned with the waist-shaped slots on the frame mounting plate of the centrifugal turntable frame. The asynchronous motor, the motor mounting base plate, and the centrifugal turntable frame are fastened together by bolts evenly distributed in the circumferential direction. The lower end face of the driving pulley is flush with the end face of the motor shaft at the lower end of the asynchronous motor. Key grooves are provided in the inner hole of the driving pulley and the motor shaft head at the lower end of the asynchronous motor and are connected by flat keys. The asynchronous motor transmits torque to the driving pulley through the flat key.

[0099] Furthermore, in the centrifugal turntable device of the induction skull furnace of the present invention, the skull furnace mold shell is fixed on the centrifugal turntable. The melting crucible is located above the skull furnace mold shell and the centrifugal turntable and is installed on the tilting device in the melting and casting cavity and can be driven by the tilting device to perform a flipping motion.

[0100] Compared with the prior art, the present invention adopts the following structure: a skull furnace mold shell is arranged inside the melting and casting cavity; a centrifugal turntable main shaft device is connected below the skull furnace mold shell; a centrifugal turntable braking device is arranged below the centrifugal turntable main shaft device; the centrifugal turntable main shaft device is braked by mechanical friction; the centrifugal turntable driving device is arranged on one side of the centrifugal turntable main shaft device; the rotational power of the motor is transmitted to the centrifugal turntable main shaft device through the pulley transmission pair device to perform a rotational motion, driving the skull furnace mold shell to perform centrifugal casting.

[0101] The present invention provides a bellows dust-proof cover structure for the centrifugal system. By utilizing the flexible connection feature of the bellows dust-proof cover, the vibration generated by the centrifugal turntable device is isolated from the furnace body, significantly reducing the vibration of the entire equipment and improving the operation reliability of the equipment. Thus, it solves the problem that the vibration of the induction skull furnace during centrifugal motion causes the same strong vibration of the furnace body and the mold, which troubles the normal production of the induction skull furnace and affects the product qualification rate.

[0102] At the same time, the present invention adopts a double dust-proof barrier composed of a dust-proof cover and a bellows dust-proof cover to prevent dust and debris in the melting and casting cavity from invading the components covered by the dust-proof cover and the bellows dust-proof cover in the centrifugal main shaft device, achieving reliable dust prevention. Multiple O-ring seal structures are adopted in this device to isolate the space in the melting and casting cavity from the outside atmosphere, achieving reliable sealing.

[0103] The present invention also adopts a centrifugal turntable braking mechanism. After the induction skull melting furnace completes the centrifugal casting operation, on-site personnel can brake the centrifugal turntable device by stepping on the brake support pedal, which improves the convenience of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] Figure 1 is the front view of the present invention;

[0105] Figure 2 is the top view of the present invention;

[0106] Figure 3 is the A-A cross-sectional view of the present invention;

[0107] Figure 4 is the B-B cross-sectional view of the present invention;

[0108] Figure 5 is the C-C cross-sectional view of the present invention;

[0109] Figure 6 is the D-D cross-sectional view of the present invention;

[0110] Figure 7 is the enlarged partial view E of the present invention;

[0111] Figure 8 is the right view of the present invention;

[0112] Figure 9 is the enlarged partial view F of the present invention.

[0113] In the figure: 1 - centrifugal disk baffle, 2 - centrifugal turntable, 3 - dust cover mounting plate, 4 - dust cover mounting plate base, 5 - dust cover, 6 - upper fixing plate of bearing seat, 7 - bellows dust cover, 8 - bearing seat, 9 - cavity bottom plate, 10 - upper sealing plate, 11 - lower sealing plate, 12 - lower fixing plate of bearing seat, 13 - hanging plate, 14 - centrifugal turntable frame, 15 - bakelite brake pad, 16 - brake chassis, 17 - brake spring, 18 - brake pedal, 19 - large hinge shaft, 20 - small hinge shaft, 21 - brake support, 22 - mounting and fixing bottom plate, 23 - driven pulley, 24 - cavity foot, 25 - V-belt, 26 - adjusting bolt, 27 - motor tensioning block, 28 - driving pulley, 29 - motor mounting pad, 30 - asynchronous motor, 31 - top ring, 32 - double nut, 33 - threaded ring, 34 - cylindrical roller bearing, 35 - first O-ring, 36 - spacer ring, 37 - spacer, 38 - spherical roller bearing, 39 - second O-ring, 40 - third O-ring, 41 - fourth O-ring, 42 - fifth O-ring, 43 - sixth O-ring, 44 - sealing spacer ring, 45 - pressure ring, 46 - rotating shaft, 47 - melting crucible, 48 - casting cavity, 49 - ingot shell furnace mold shell, 100 - centrifugal turntable main shaft device, 200 - centrifugal turntable brake device, 300 - centrifugal turntable drive device. Detailed implementation manners

[0114] To make the objectives, technical solutions and advantages of the present invention clearer, the following will elaborate on each implementation manner of the present invention with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each implementation manner of the present invention, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation manners, the technical solutions claimed in each claim of the present application can still be achieved.

[0115] The implementation manner of the present invention relates to a centrifugal turntable device of an induction skull furnace, as Figures 1-9 shown, including:

[0116] A casting cavity 48 is arranged in the centrifugal turntable device of the induction skull furnace in this embodiment;

[0117] An ingot shell furnace mold shell 49 is arranged inside the casting cavity 48; the ingot shell furnace mold shell 49 is used to hold the molten steel coming out of the melting crucible 47;

[0118] A centrifugal turntable main shaft device 100 is arranged below the ingot shell furnace mold shell 49; the centrifugal turntable main shaft device 100 is connected to the ingot shell furnace mold shell 49;

[0119] A centrifugal turntable braking device 200 is provided below the main shaft device 100 of the centrifugal turntable; the centrifugal turntable braking device 200 plays a braking role on the main shaft device 100 of the centrifugal turntable through mechanical friction;

[0120] The centrifugal turntable driving device 300 is arranged on one side of the main shaft device 100 of the centrifugal turntable; the centrifugal turntable driving device 300 transmits the rotational power of the motor to the main shaft device 100 of the centrifugal turntable through a pulley transmission pair device to perform rotational motion, driving the mold shell 49 of the skull furnace for centrifugal casting, playing a role in providing driving force

[0121] Inside the melting and casting cavity 48, a melting crucible 47 is arranged above the main shaft device 100 of the centrifugal turntable.

[0122] This embodiment realizes isolating the vibration generated by the centrifugal turntable device from the furnace body by using the soft connection feature of the bellows dust cover, significantly reducing the vibration of the entire equipment, and improving the operation reliability of the equipment. Thus, it solves the problem that the vibration of the induction skull furnace during centrifugal motion causes the same strong vibration of the furnace body and the mold, which troubles the normal production of the induction skull furnace and affects the product qualification rate.

[0123] At the same time, this embodiment adopts a double dust-proof barrier composed of a dust cover and a bellows dust cover to prevent dust and sundries in the melting and casting cavity from invading the components covered by the dust cover and the bellows dust cover in the centrifugal main shaft device, realizing reliable dust prevention. Multiple O-ring seal structures are adopted to isolate the space in the melting and casting cavity from the outside atmosphere, realizing reliable sealing.

[0124] This embodiment also adopts a centrifugal turntable braking mechanism. After the induction skull furnace completes the centrifugal casting operation, on-site personnel can brake the centrifugal turntable device by stepping on the brake support pedal, improving the convenience of equipment operation.

[0125] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the main shaft device 100 of the centrifugal turntable further includes:

[0126] A centrifugal turntable 2 is arranged below the mold shell 49 of the skull furnace;

[0127] A centrifugal disc baffle 1 is arranged at the upper end of the centrifugal turntable 2;

[0128] The centrifugal turntable 2 is sleeved on the upper end of the rotating shaft 46;

[0129] A driven pulley 23 is fixedly connected to the lower end of the rotating shaft 46, and the upper end surface of the driven pulley 23 is attached to the shaft shoulder at the lower end of the rotating shaft 46,

[0130] A threaded ring 33 is threadedly connected at the threaded section of the lower part of the rotating shaft 46;

[0131] The upper end face of the thread ring 33 is in contact with the lower end face of the inner ring of the cylindrical roller bearing 34.

[0132] The lower end face of the thread ring 33 is in contact with the upper end face of the double nut 32; the double nut 32 is threadedly connected to the thread section at the lower part of the rotating shaft 46; the double nut 32 and the thread ring 33 act together to transmit an upward fastening force along the rotating shaft 46 to the inner ring of the cylindrical roller bearing 34.

[0133] A spacer ring 36 is fixed on the rotating shaft 46.

[0134] The lower end face of the spacer ring 36 is in contact with the upper end face of the inner ring of the cylindrical roller bearing 34.

[0135] The upper end face of the spacer ring 36 is in contact with the lower end face of the inner ring of the spherical roller bearing 38.

[0136] The cylindrical roller bearing 34 is fixed in the bearing hole at the lower end of the bearing housing 8.

[0137] The lower end face of the outer ring of the cylindrical roller bearing 34 is in contact with the upper end face of the top ring 31; the outer ring of the cylindrical roller bearing 34 is firmly fixed in the bearing hole at the lower end of the bearing housing 8.

[0138] The cylindrical surface of the inner ring of the cylindrical roller bearing 34 is in contact with the bearing section cylindrical surface at the lower end of the rotating shaft 46.

[0139] The upper end face of the inner ring of the cylindrical roller bearing 34 is in contact with the lower end face of the spacer ring 36.

[0140] The lower end face of the inner ring of the cylindrical roller bearing 34 is in contact with the upper end face of the thread ring 33, and the inner ring of the cylindrical roller bearing 34 is fastened on the rotating shaft 46.

[0141] A spacer 37 is fixed in the bearing hole at the upper end of the bearing housing 8; the lower end face of the spacer 37 is in contact with the bottom surface of the bearing hole at the upper end of the bearing housing 8.

[0142] The upper end face of the spacer 37 is in contact with the lower end face of the outer ring of the spherical roller bearing 38.

[0143] The upper end face of the outer ring of the spherical roller bearing 38 is in contact with the lower end face of the dust cover mounting plate base 4.

[0144] The lower end face of the outer ring of the spherical roller bearing 38 is in contact with the upper end face of the spacer 37; the outer ring of the spherical roller bearing 38 is firmly clamped in the bearing hole at the upper end of the bearing housing 8.

[0145] The cylindrical surface of the inner ring of the spherical roller bearing 38 is in contact with the bearing section cylindrical surface at the upper end of the rotating shaft 46.

[0146] The lower end face of the inner ring of the spherical roller bearing 38 is in contact with the upper end face of the spacer ring 36; the inner ring of the spherical roller bearing 38 is fastened to the rotating shaft 46;

[0147] The bearing housing 8 is welded to the upper fixing plate 6 of the bearing housing;

[0148] The bearing housing 8 is fixed on the upper end face of the lower fixing plate 12 of the bearing housing;

[0149] The lower fixing plate 12 of the bearing housing is fixed on the frame mounting plate of the centrifugal turntable frame 14;

[0150] The top ring 31 is fixed in the large hole of the lower fixing plate 12 of the bearing housing. The upper end face of the edge of the top ring 31 is in contact with the lower end face inside the lower fixing plate 12 of the bearing housing, and the top ring 31 is fastened to the lower fixing plate 12 of the bearing housing by circumferentially evenly distributed screws;

[0151] The dust cover mounting plate base 4 is fixed above the upper fixing plate 6 of the bearing housing;

[0152] The dust cover mounting plate 3 is fixed above the dust cover mounting plate base 4;

[0153] The dust cover 5 is fixed above the dust cover mounting plate 3. The central axis of the inner hole of the dust cover 5 coincides with the central axis of the inner hole of the dust cover mounting plate 3;

[0154] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the centrifugal turntable 2 is sleeved on the upper end of the rotating shaft 46. The lower end face of the centrifugal turntable 2 is in contact with the shaft shoulder at the upper end of the rotating shaft 46, and is fastened to the rotating shaft 46 by screws located on the lower cylindrical ring of the centrifugal turntable 2; the centrifugal disk baffle 1 is installed in the counterbore at the upper end of the centrifugal turntable 2 and is fastened to the rotating shaft 46 by screws located at the center of the upper end of the rotating shaft 46.

[0155] The driven pulley 23 is sleeved on the lower end of the rotating shaft 46. The upper end face of the driven pulley 23 is in contact with the shaft shoulder at the lower end of the rotating shaft 46. Key grooves are provided in the inner hole of the driven pulley 23 and the lower shaft head of the rotating shaft 46 and are connected by a flat key. The driven pulley 23 transmits torque to the rotating shaft 46 through the flat key, and the rotating shaft 46 then transmits the torque to the centrifugal turntable 2, driving the skull furnace mold shell 49 fixed on the centrifugal turntable 2 to rotate together to achieve centrifugal casting of the skull furnace.

[0156] The lower fixing plate 12 of the bearing housing is installed on the frame mounting plate of the centrifugal turntable frame 14. The lower protruding cylinder of the lower fixing plate 12 of the bearing housing is embedded in the large hole of the frame mounting plate of the centrifugal turntable frame 14. The lower end face of the outer edge of the lower fixing plate 12 of the bearing housing is attached to the upper end face of the frame mounting plate of the centrifugal turntable frame 14, and the lower fixing plate 12 of the bearing housing and the centrifugal turntable frame 14 are fastened together by circumferentially evenly distributed screws.

[0157] The inner cylindrical surface of the cylindrical roller bearing 34 is attached to the bearing shoulder cylindrical surface at the lower end of the rotating shaft 46. The upper end face of the inner ring of the cylindrical roller bearing 34 is attached to the lower end face of the spacer ring 36. The lower end face of the inner ring of the cylindrical roller bearing 34 is attached to the upper end face of the threaded ring 33. In this way, the inner ring of the cylindrical roller bearing 34 is fastened to the rotating shaft 46.

[0158] The threaded ring 33 is installed at the threaded portion at the lower part of the rotating shaft 46 by means of thread fitting. The upper end face of the threaded ring 33 is attached to the lower end face of the inner ring of the cylindrical roller bearing 34. The lower end face of the threaded ring 33 is attached to the upper end face of the double nut 32. The double nut 32 is installed at the threaded portion at the lower part of the rotating shaft 46 by means of thread fitting. The double nut 32 and the threaded ring 33 act together to transmit an upward fastening force along the rotating shaft 46 to the inner ring of the cylindrical roller bearing 34.

[0159] The spacer ring 36 is installed on the rotating shaft 46. The lower end face of the spacer ring 36 is attached to the upper end face of the inner ring of the cylindrical roller bearing 34. The upper end face of the spacer ring 36 is attached to the lower end face of the inner ring of the spherical roller bearing 38. The spacer ring 36 transmits a downward fastening force along the rotating shaft 46 to the inner ring of the cylindrical roller bearing 34, and at the same time transmits an upward fastening force along the rotating shaft 46 to the inner ring of the spherical roller bearing 38.

[0160] The spacer 37 is installed in the bearing hole at the upper end of the bearing housing 8. The lower end face of the spacer 37 is attached to the bottom surface of the bearing hole at the upper end of the bearing housing 8. The upper end face of the spacer 37 is attached to the lower end face of the outer ring of the spherical roller bearing 38.

[0161] The spherical roller bearing 38 is installed in the bearing hole at the upper end of the bearing housing 8; the outer cylindrical surface of the spherical roller bearing 38 fits with the inner cylindrical surface of the bearing hole at the upper end of the bearing housing 8, the upper end face of the outer ring of the spherical roller bearing 38 fits with the lower end face of the dust cover mounting plate base 4, and the lower end face of the outer ring of the spherical roller bearing 38 fits with the upper end face of the spacer ring 37; in this way, the outer ring of the spherical roller bearing 38 is firmly clamped in the bearing hole at the upper end of the bearing housing 8. The inner cylindrical surface of the spherical roller bearing 38 fits with the bearing collar cylindrical surface at the upper end of the rotating shaft 46, the upper end face of the inner ring of the spherical roller bearing 38 fits with the lower end face of the bearing collar shoulder at the upper end of the rotating shaft 46, and the lower end face of the inner ring of the spherical roller bearing 38 fits with the upper end face of the spacer ring 36; in this way, the inner ring of the spherical roller bearing 38 is fastened to the rotating shaft 46.

[0162] The upper fixing plate 6 of the bearing housing is connected to the bearing housing 8 by welding. The inner edge of the lower end face of the upper fixing plate 6 of the bearing housing fits with the upper end face of the bearing housing 8, and the central axis of the inner hole of the upper fixing plate 6 of the bearing housing coincides with the central axis of the inner hole of the bearing housing 8.

[0163] The dust cover mounting plate base 4 is installed above the upper fixing plate 6 of the bearing housing. The central axis of the inner hole of the dust cover mounting plate base 4 coincides with the central axis of the inner hole of the upper fixing plate 6 of the bearing housing. The flange lower end face of the dust cover mounting plate base 4 fits with the upper end face of the upper fixing plate 6 of the bearing housing, and the dust cover mounting plate base 4 and the upper fixing plate 6 of the bearing housing are fastened together by circumferentially evenly distributed screws.

[0164] The dust cover mounting plate 3 is installed above the dust cover mounting plate base 4. The central axis of the inner hole of the dust cover mounting plate 3 coincides with the central axis of the inner hole of the dust cover mounting plate base 4. The lower end face of the dust cover mounting plate 3 fits with the flange upper end face of the dust cover mounting plate base 4, and the dust cover mounting plate 3 and the dust cover mounting plate base 4 are fastened together by circumferentially evenly distributed screws.

[0165] The dust cover 5 is installed above the dust cover mounting plate 3. The central axis of the inner hole of the dust cover 5 coincides with the central axis of the inner hole of the dust cover mounting plate 3. The lower surface of the dust cover 5 fits with the upper end face of the dust cover mounting plate 3, and the dust cover 5 and the dust cover mounting plate 3 are fastened together by circumferentially evenly distributed screws. The dust cover 5 serves to isolate the molten metal cavity 48 from the part below the upper shaft head of the rotating shaft 46, preventing dust and debris in the molten metal cavity 48 from invading the various components covered by the dust cover 5 in the centrifugal main shaft device 100.

[0166] Fix the corrugated bellows dust cover 7 below the dust cover 5; the lower end face of the outer cylindrical ring of the corrugated bellows dust cover 7 fits against the upper end face of the cavity bottom plate 9; the outer cylindrical surface of the lower end of the inner cylindrical ring of the corrugated bellows dust cover 7 fits against the inner hole cylindrical surface of the upper sealing plate 10; the upper end of the inner hole of the corrugated bellows dust cover 7 is sleeved and fits against the outer cylindrical surface of the dust cover mounting plate 3;

[0167] The upper sealing plate 10 is installed above the lower sealing plate 11. The central axis of the inner hole of the upper sealing plate 10 coincides with the central axis of the inner hole of the lower sealing plate 11. The lower end face of the upper sealing plate 10 fits against the upper end face of the lower sealing plate 11, and the upper sealing plate 10 and the lower sealing plate 11 are fastened together by circumferentially evenly distributed screws;

[0168] The lower sealing plate 11 is fixedly connected to the casting cavity 48 by welding. The upper end face of the outer edge of the lower sealing plate 11 fits against the lower end face of the seamless steel pipe at the bottom of the casting cavity 48; the central axis of the inner hole of the lower sealing plate 11 coincides with the central axis of the inner hole of the seamless steel pipe at the bottom of the casting cavity 48;

[0169] The second dust-proof structure is formed by enclosing the dust cover mounting plate 3, the corrugated bellows dust cover 7, the upper sealing plate 10, the lower sealing plate 11, the seamless steel pipe of the casting cavity 48 and the cavity bottom plate 9, preventing dust and sundries in the casting cavity 48 from invading the centrifugal main shaft device 100.

[0170] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the centrifugal turntable main shaft device 100 further includes:

[0171] A first O-ring seal 35 is provided on the lower end face of the upper sealing plate 10, and the first O-ring seal 35 is pressed by the lower sealing plate 11 into the annular groove on the lower end face of the upper sealing plate 10;

[0172] A second O-ring seal 39 is provided on the upper end face of the bearing seat upper fixing plate 6, and the second O-ring seal 39 is pressed by the dust cover mounting plate base 4 into the annular groove on the upper end face of the bearing seat upper fixing plate 6;

[0173] A third O-ring seal 40 is provided on the upper end face of the dust cover mounting plate base 4, and the third O-ring seal 40 is pressed by the dust cover mounting plate 3 into the annular groove on the upper end face of the dust cover mounting plate base 4;

[0174] A fourth O-ring seal 41 is provided on the outer cylindrical surface of the inner edge of the lower end face of the flange of the dust cover mounting plate base 4 close to it, and the fourth O-ring seal 41 is pressed by the bearing seat upper fixing plate 6 into the annular groove on the outer cylindrical surface of the inner edge of the lower end face of the flange of the dust cover mounting plate base 4;

[0175] Fix a pressure ring 45 inside the first step down from the upper end face of the dust cover mounting plate base 4; the lower flange end face of the pressure ring 45 fits against the first step face down from the upper end face of the dust cover mounting plate base 4, and the pressure ring 45 and the dust cover mounting plate base 4 are fixed by circumferentially evenly distributed screws;

[0176] Fix a sealing spacer ring 44 inside the second step down from the upper end face of the dust cover mounting plate base 4; the outer cylindrical surface of the sealing spacer ring 44 fits against the inner cylindrical surface of the second step down from the upper end face of the dust cover mounting plate base 4;

[0177] Arrange a sixth O-ring 43 below the pressure ring 45; under the pressing force of the pressure ring 45, the sixth O-ring 43 is pressed tightly inside the space surrounded by the pressure ring 45, the dust cover mounting plate base 4, the sealing spacer ring 44, and the rotating shaft 46;

[0178] A fifth O-ring 42 is arranged below the sealing spacer ring 44. Under the pressing force of the sealing spacer ring 44, the fifth O-ring is pressed tightly inside the space surrounded by the sealing spacer ring 44, the dust cover mounting plate base 4, and the rotating shaft 46.

[0179] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment is as Figures 1-9 shown. The centrifugal turntable braking device 200 includes:

[0180] Arrange a bakelite brake pad 15 directly below the driven pulley 23 of the centrifugal turntable main shaft device 100;

[0181] The lower end face of the bakelite brake pad 15 fits against the upper end face of the brake chassis 16;

[0182] Arrange a brake pedal support 18 below the brake chassis 16;

[0183] A small hinge shaft 20 passes through the symmetry axis holes on the brake pedal support 18 and the symmetry axis holes on the brake chassis 16;

[0184] Arrange a brake support 21 below the brake pedal support 18;

[0185] A large hinge shaft 19 passes through the symmetry axis holes on the two axle seats in the middle of the bottom of the brake pedal support 18 and the symmetry axis holes at the upper ends of the two side support plates of the brake support 21;

[0186] Arrange a mounting and fixing base plate 22 below the brake support 21, and the brake support 21 is fixed to the mounting and fixing base plate 22 by welding;

[0187] The hanging plate 13 is fixed to the bottom cavity door frame plate of the melting and casting cavity 48 by welding;

[0188] The upper end of the brake spring 17 is hooked in the hanging hole of the hanging plate 13, and the lower end of the brake spring 17 is hooked in the hanging ear hole on the brake support pedal 18;

[0189] The braking torque applied to the pedal end of the brake support pedal 18 is transmitted to the brake chassis 16 and the bakelite brake pads 15 through the brake support pedal 18; the mechanical energy is consumed through the relative friction between the bakelite brake pads 15 and the driven pulley 23 to brake the centrifugal turntable main shaft device 100.

[0190] The bakelite brake pads 15 are located directly below the driven pulley 23. The lower end face of the bakelite brake pads 15 is in contact with the upper end face of the brake chassis 16. The central axis of the inner cylindrical surface of the bakelite brake pads 15 coincides with the central axis of the inner cylindrical surface of the brake chassis 16, and the bakelite brake pads 15 and the brake chassis 16 are fastened together by circumferentially evenly distributed screws.

[0191] The brake support pedal 18 is located below the brake chassis 16. Symmetric shaft holes are provided on the two symmetric frame edges of the brake support pedal 18. Symmetric shaft holes are provided on the two symmetric shaft seats of the brake chassis 16 and are coaxial with the shaft holes on the brake support pedal 18. The two symmetric frame edges of the brake support pedal 18 are respectively embedded between the two symmetric shaft seats of the brake chassis 16. The small hinge shaft 20 passes through the symmetric shaft holes on the brake support pedal 18 and the symmetric shaft holes on the brake chassis 16. The small hinge shaft 20 is fixed to the brake chassis 16 by retaining rings at both ends of itself. In this way, the brake chassis 16 and the brake support pedal 18 can be connected together, and the brake chassis 16 and the brake support pedal 18 can rotate relative to each other around the small hinge shaft 20.

[0192] The brake support 21 is located below the brake support pedal 18. Symmetric shaft holes are provided at the upper ends of the two support plates on both sides of the brake support 21. Symmetric shaft holes are provided on the two shaft seats in the middle of the bottom of the brake support pedal 18 and are coaxial with the shaft holes on the brake support 21. The two symmetric shaft seats in the middle of the bottom of the brake support pedal 18 are embedded in the middle of the upper ends of the two support plates on both sides of the brake support 21. The large hinge shaft 19 passes through the symmetric shaft holes on the two shaft seats in the middle of the bottom of the brake support pedal 18 and the two symmetric shaft holes at the upper ends of the two support plates on both sides of the brake support 21. The large hinge shaft 19 is fixed to the brake support 21 by retaining rings at both ends of itself. In this way, the brake support pedal 18 and the brake support 21 can be connected together, and the brake support pedal 18 can rotate relative to the large hinge shaft 19.

[0193] The installation and fixing base plate 22 is located below the brake support 21, and the brake support 21 is fixed to the installation and fixing base plate 22 by welding.

[0194] The hanging plate 13 is fixed to the bottom cavity door frame plate of the melting and casting cavity 48 by welding. Hanging holes are provided on the hanging plate 13, and hanging ears are provided at the part of the brake support pedal 18 near the pedal end. The upper end of the brake spring 17 is hooked in the hanging hole of the hanging plate 13, and the lower end of the brake spring 17 is hooked in the hanging ear hole on the brake support pedal 18.

[0195] Finally, the braking torque applied to the pedal end of the brake support pedal 18 can be transmitted to the brake chassis 16 and the bakelite brake pads 15 through the brake support pedal 18. The mechanical energy is consumed through the relative friction between the bakelite brake pads 15 and the driven pulley 23, realizing the braking function of the centrifugal turntable device. When the braking torque at the pedal end of the brake support pedal 18 is withdrawn, the brake support pedal 18 returns to the position before braking under the pulling force of the brake spring 17, and at the same time drives the brake chassis 16 and the bakelite brake pads 15 to disengage from the driven pulley 23 downward together, stopping the braking action.

[0196] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the central axis of the inner cylindrical surface of the bakelite brake pads 15 coincides with the central axis of the inner cylindrical surface of the brake chassis 16, and the bakelite brake pads 15 and the brake chassis 16 are fastened together by circumferentially evenly distributed screws;

[0197] Symmetric shaft holes are provided on the two symmetric frame edges of the brake support pedal 18, and symmetric shaft holes are provided on the two symmetric shaft seats of the brake chassis 16 and are coaxial with the shaft holes on the brake support pedal 18;

[0198] The two symmetric frame edges of the brake support pedal 18 are respectively embedded between the two symmetric shaft seats of the brake chassis 16;

[0199] The small hinge shaft 20 is fixed to the brake chassis 16 by snap rings at both ends of itself;

[0200] The small hinge shaft 20 connects the brake chassis 16 and the brake support pedal 18; enabling the brake chassis 16 and the brake support pedal 18 to rotate relative to each other around the small hinge shaft 20;

[0201] Symmetric shaft holes are provided at the upper ends of the two support plates on both sides of the brake support 21, and symmetric shaft holes are provided on the two shaft seats in the middle of the bottom of the brake support 21 and are coaxial with the shaft holes on the brake support 21; the two symmetric shaft seats in the middle of the bottom of the brake support pedal 18 are embedded in the middle of the upper ends of the two support plates on both sides of the brake support 21;

[0202] The large hinge shaft 19 is fixed to the brake support 21 by snap rings at both ends of itself;

[0203] The large hinge shaft 19 connects the brake support pedal 18 and the brake support 21; enabling the brake support pedal 18 to rotate relative to the large hinge shaft 19;

[0204] The hanging plate 13 is provided with hanging holes; a hanging ear is provided at a position on the brake support pedal 18 near the pedal end.

[0205] To achieve the above technical effects, in the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the centrifugal turntable drive device 300 further includes:

[0206] On one side of the melting and casting cavity 48, an asynchronous motor 30 is fixed above the motor mounting base plate 29;

[0207] The bottom plane of the mounting flange of the asynchronous motor 30 is in contact with the upper end surface of the motor mounting base plate 29; the cylindrical protrusion on the bottom plane of the mounting flange of the asynchronous motor 30 is embedded in the counterbore on the upper end surface of the motor mounting base plate 29, and the bolt holes evenly distributed circumferentially on the mounting flange of the asynchronous motor 30 are aligned with the bolt holes evenly distributed circumferentially on the motor mounting base plate 29;

[0208] The motor mounting base plate 29 is located above the frame mounting plate of the centrifugal turntable frame 14;

[0209] The bottom plane of the motor mounting base plate 29 is in contact with the upper end surface of the frame mounting plate of the centrifugal turntable frame 14;

[0210] A driving pulley 28 is sleeved on the motor shaft at the lower end of the asynchronous motor 30;

[0211] Both ends of a V-belt 25 are respectively nested in the V-grooves of the driving pulley 28 and the driven pulley 23; the driving pulley 28 transmits torque to the driven pulley 23 through the V-belt 25;

[0212] A motor tensioning block 27 is provided near the side of the motor mounting base plate 29 facing the driven pulley 23, and the motor tensioning block 27 is provided with a threaded hole and an adjusting bolt 26; by changing the extending length of the adjusting bolt 26 on the motor tensioning block 27, the distance between the driving pulley 28 and the driven pulley 23 and the tension of the V-belt 25 are adjusted.

[0213] To achieve the above technical effects, in the centrifugal turntable device of the induction skull furnace in this embodiment, as Figures 1-9 shown, the bolt holes evenly distributed circumferentially on the motor mounting base plate 29 are respectively aligned with the waist-shaped grooves on the frame mounting plate of the centrifugal turntable frame 14; the asynchronous motor 30, the motor mounting base plate 29, and the centrifugal turntable frame 14 are fastened together by bolts evenly distributed circumferentially; the lower end surface of the driving pulley 28 is flush with the end surface of the motor shaft at the lower end of the asynchronous motor 30, and key grooves are provided in the inner hole of the driving pulley 28 and the motor shaft head at the lower end of the asynchronous motor 30 and are connected by flat keys, and the asynchronous motor 30 transmits torque to the driving pulley 28 through the flat keys.

[0214] To achieve the above technical effects, the centrifugal turntable device of the induction skull furnace in this embodiment is as follows Figures 1-9 As shown, the skull furnace mold shell 49 is fixed on the centrifugal turntable 2; the melting crucible 47 is located above the skull furnace mold shell 49 and the centrifugal turntable 2 and is installed on the tilting device in the casting cavity, and can be driven by the tilting device to perform a flipping motion.

[0215] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and details without departing from the spirit and scope of the present invention.

Claims

1. A centrifugal turntable device for an induction skull furnace, characterized in that, Comprising: A casting cavity (48); A skull furnace mold shell (49), with the skull furnace mold shell (49) arranged inside the casting cavity (48); A centrifugal turntable main shaft device (100), with the centrifugal turntable main shaft device (100) connected below the skull furnace mold shell (49); A centrifugal turntable braking device (200), with the centrifugal turntable braking device (200) arranged below the centrifugal turntable main shaft device (100); which plays a braking role on the centrifugal turntable main shaft device (100) through mechanical friction; A centrifugal turntable driving device (300), with the centrifugal turntable driving device (300) arranged on one side of the centrifugal turntable main shaft device (100); transmitting the rotational power of the motor to the centrifugal turntable main shaft device (100) through a pulley transmission pair device to make it rotate, driving the skull furnace mold shell (49) for centrifugal casting.

2. The centrifugal turntable device of the induction skull furnace according to claim 1, characterized in that, Inside the casting cavity (48), a melting crucible (47) is connected above the centrifugal turntable main shaft device (100).

3. The centrifugal turntable device of the induction skull furnace according to claim 1, characterized in that, The centrifugal turntable main shaft device (100) further comprises: A centrifugal turntable (2), with the centrifugal turntable (2) arranged below the skull furnace mold shell (49); A centrifugal disc baffle (1), with the centrifugal disc baffle (1) arranged at the upper end of the centrifugal turntable (2); A rotating shaft (46), with the centrifugal turntable (2) sleeved on the upper end of the rotating shaft (46); A driven pulley (23), with the driven pulley (23) fixedly connected to the lower end of the rotating shaft (46), and the upper end face of the driven pulley (23) fitting with the shoulder at the lower end of the rotating shaft (46); A threaded ring (33), with the threaded ring (33) threadedly connected at the threaded section of the lower part of the rotating shaft 46; A cylindrical roller bearing (34), with the upper end face of the threaded ring (33) fitting with the lower end face of the inner ring of the cylindrical roller bearing (34); A double nut (32), with the lower end face of the threaded ring (33) fitting with the upper end face of the double nut (32); the double nut (32) is threadedly connected at the threaded section of the lower part of the rotating shaft (46); the double nut (32) and the threaded ring (33) jointly act to transmit an upward tightening force along the rotating shaft (46) to the inner ring of the cylindrical roller bearing 34; A spacer ring (36), with the spacer ring (36) fixed on the rotating shaft (46); A cylindrical roller bearing (34), with the lower end face of the spacer ring 36 fitting with the upper end face of the inner ring of the cylindrical roller bearing (34); A spherical roller bearing (38), with the upper end face of the spacer ring (36) fitting with the lower end face of the inner ring of the spherical roller bearing (38); A bearing housing (8), with the cylindrical roller bearing (34) fixed in the bearing hole at the lower end of the bearing housing (8); A top ring (31), with the lower end face of the outer ring of the cylindrical roller bearing (34) fitting with the upper end face of the top ring (31); the outer ring of the cylindrical roller bearing (34) is firmly fixed in the bearing hole at the lower end of the bearing housing (8); The inner cylindrical surface of the cylindrical roller bearing (34) is in contact with the bearing shoulder cylindrical surface at the lower end of the rotating shaft (46); Spacer ring (36), the upper end face of the inner ring of the cylindrical roller bearing (34) is in contact with the lower end face of the spacer ring (36); Threaded ring (33), the lower end face of the inner ring of the cylindrical roller bearing (34) is in contact with the upper end face of the threaded ring (33), and the inner ring of the cylindrical roller bearing (34) is fastened to the rotating shaft (46); Spacer ring (37), the spacer ring (37) is fixed in the bearing hole at the upper end of the bearing housing 8; the lower end face of the spacer ring (37) is in contact with the bottom surface of the bearing hole at the upper end of the bearing housing (8); Self-aligning roller bearing (38), the upper end face of the spacer ring (37) is in contact with the lower end face of the outer ring of the self-aligning roller bearing (38); Dust cover mounting plate base (4), the upper end face of the outer ring of the self-aligning roller bearing (38) is in contact with the lower end face of the dust cover mounting plate base (4); Spacer ring (37), the lower end face of the outer ring of the self-aligning roller bearing (38) is in contact with the upper end face of the spacer ring (37); the outer ring of the self-aligning roller bearing (38) is firmly clamped in the bearing hole at the upper end of the bearing housing (8); The inner cylindrical surface of the self-aligning roller bearing (38) is in contact with the bearing shoulder cylindrical surface at the upper end of the rotating shaft (46); Spacer ring (36), the lower end face of the inner ring of the self-aligning roller bearing (38) is in contact with the upper end face of the spacer ring (36); the inner ring of the self-aligning roller bearing (38) is fastened to the rotating shaft (46); Upper fixing plate of bearing housing (6), the bearing housing (8) is welded to the upper fixing plate of bearing housing (6); Lower fixing plate of bearing housing (12), the bearing housing (8) is fixed on the upper end face of the lower fixing plate of bearing housing (12); Centrifugal turntable frame (14), the lower fixing plate of bearing housing (12) is fixed on the frame mounting plate of the centrifugal turntable frame (14); Top ring (31), the top ring (31) is fixed in the large hole of the lower fixing plate of bearing housing (12), the upper end face of the edge of the top ring (31) is in contact with the lower end face inside the lower fixing plate of bearing housing (12), and the top ring (31) is fastened to the lower fixing plate of bearing housing (12) by circumferentially evenly distributed screws; Dust cover mounting plate base (4), the dust cover mounting plate base (4) is fixed above the rotating shaft (46); The upper fixing plate of bearing housing (6), the dust cover mounting plate base (4) is fixed above the upper fixing plate of bearing housing (6); Dust cover mounting plate (3), the dust cover mounting plate (3) is fixed above the dust cover mounting plate base 4; Dust cover (5), the dust cover (5) is fixed above the dust cover mounting plate (3), and the central axis of the inner hole of the dust cover (5) coincides with the central axis of the inner hole of the dust cover mounting plate (3); Bellows dust cover (7), the bellows dust cover (7) is fixed below the dust cover (5); The cavity bottom plate (9), the lower end surface of the outer cylindrical ring of the bellows dust cover (7) is attached to the upper end surface of the cavity bottom plate (9); The upper sealing plate (10), the outer cylindrical surface of the lower end of the inner cylindrical ring of the bellows dust cover (7) is attached to the inner hole cylindrical surface of the upper sealing plate (10); the upper end of the inner hole of the bellows dust cover (7) is sleeved and attached to the outer cylindrical surface of the dust cover mounting plate (3); The lower sealing plate (11), the upper sealing plate (10) is installed above the lower sealing plate (11), the central axis of the inner hole of the upper sealing plate (10) coincides with the central axis of the inner hole of the lower sealing plate (11), the lower end surface of the upper sealing plate (10) is attached to the upper end surface of the lower sealing plate (11), and the upper sealing plate (10) and the lower sealing plate (11) are fastened together by circumferentially evenly distributed screws; The lower sealing plate (11) is fixedly connected to the casting cavity (48) by welding, the upper end surface of the outer edge of the lower sealing plate (11) is attached to the lower end surface of the seamless steel pipe at the bottom of the casting cavity (48); the central axis of the inner hole of the lower sealing plate (11) coincides with the central axis of the inner hole of the seamless steel pipe at the bottom of the casting cavity (48); The second dust-proof structure is surrounded by the dust cover mounting plate (3), the bellows dust cover (7), the upper sealing plate (10), the lower sealing plate (11), the seamless steel pipe of the casting cavity (48) and the cavity bottom plate (9) to prevent dust and sundries in the casting cavity (48) from invading the centrifugal main shaft device (100).

4. The centrifugal turntable device of the induction skull furnace according to claim 3, characterized in that, The centrifugal disc baffle (1) is fixed in the counterbore at the upper end of the centrifugal turntable (2) and is fastened to the rotating shaft (46) by a screw located at the center of the upper end of the rotating shaft (46); The centrifugal turntable (2) is sleeved on the upper end of the rotating shaft (46); the lower end surface of the centrifugal turntable (2) is attached to the shaft shoulder at the upper end of the rotating shaft (46), and is fastened to the rotating shaft (46) by bolts located on the lower cylindrical ring of the centrifugal turntable 2; Key grooves are provided in the inner hole of the driven pulley (23) and the lower end shaft head of the rotating shaft (46) and are connected by a flat key; the driven pulley (23) transmits torque to the rotating shaft (46) through the flat key, and the rotating shaft (46) then transmits the torque to the centrifugal turntable (2) to drive the skull furnace mold shell (49) fixed on the centrifugal turntable (2) to perform a rotational motion for centrifugal casting of the skull furnace; The spacer ring (36) transmits the fastening force downward along the rotating shaft (46) to the inner ring of the cylindrical roller bearing (34), and at the same time transmits the fastening force upward along the rotating shaft (46) to the inner ring of the spherical roller bearing (38); The outer cylindrical surface of the cylindrical roller bearing (34) is attached to the inner cylindrical surface of the bearing hole at the lower end of the bearing housing (8); the upper end surface of the outer ring of the cylindrical roller bearing (34) is attached to the bottom surface of the bearing hole at the lower end of the bearing housing (8); The self-aligning roller bearing (38) is fixed in the bearing hole at the upper end of the bearing housing (8); the outer cylindrical surface of the self-aligning roller bearing (38) is in contact with the inner cylindrical surface of the bearing hole at the upper end of the bearing housing (8); The upper end face of the inner ring of the self-aligning roller bearing (38) is in contact with the lower end face of the bearing shoulder at the upper end of the rotating shaft (46); The inner edge of the lower end face of the upper fixing plate (6) of the bearing housing is in contact with the upper end face of the bearing housing (8), and the central axis of the inner hole of the upper fixing plate (6) of the bearing housing coincides with the central axis of the inner hole of the bearing housing 8; The central axis of the inner hole of the bearing housing (8) coincides with the central axis of the inner hole of the lower fixing plate (12) of the bearing housing, and the bearing housing (8) and the lower fixing plate (12) of the bearing housing are fixedly connected by welding; The lower protruding cylinder of the lower fixing plate 12 of the bearing housing is embedded in the large hole of the frame mounting plate of the centrifugal turntable frame (14), and the lower end face of the outer edge of the lower fixing plate (12) of the bearing housing is in contact with the upper end face of the frame mounting plate of the centrifugal turntable frame 14, and the lower fixing plate (12) of the bearing housing and the centrifugal turntable frame (14) are fastened together by circumferentially evenly distributed screws; The central axis of the inner hole of the dust cover mounting plate base (4) coincides with the central axis of the inner hole of the upper fixing plate (6) of the bearing housing; the flange lower end face of the dust cover mounting plate base (4) is in contact with the upper end face of the upper fixing plate (6) of the bearing housing, and the dust cover mounting plate base (4) and the upper fixing plate (6) of the bearing housing are fastened together by circumferentially evenly distributed screws; The central axis of the inner hole of the dust cover mounting plate (3) coincides with the central axis of the inner hole of the dust cover mounting plate base (4); the lower end face of the dust cover mounting plate (3) is in contact with the flange upper end face of the dust cover mounting plate base (4), and the dust cover mounting plate (3) and the dust cover mounting plate base (4) are fastened together by circumferentially evenly distributed screws; The lower surface of the dust cover (5) is in contact with the upper end face of the dust cover mounting plate (3); and the dust cover (5) and the dust cover mounting plate (3) are fastened together by circumferentially evenly distributed screws; the dust cover (5) isolates the lower part of the upper shaft head of the melting cavity (48) and the rotating shaft (46); preventing dust and sundries in the melting cavity (48) from invading the centrifugal main shaft device (100).

5. The centrifugal turntable device of the induction skull furnace according to claim 3, characterized in that, The centrifugal turntable main shaft device (100) further includes: A first O-ring (35), the first O-ring (35) is provided on the lower end face of the upper sealing plate (10), and the first O-ring (35) is pressed by the lower sealing plate (11) in the annular groove on the lower end face of the upper sealing plate (10); A second O-ring (39), the second O-ring (39) is provided on the upper end face of the upper fixing plate 6 of the bearing housing, and the second O-ring (39) is pressed by the dust cover mounting plate base (4) in the annular groove on the upper end face of the upper fixing plate (6) of the bearing housing; A third O-type sealing ring (40), the third O-type sealing ring (40) is provided on the upper end surface of the dust cover mounting plate base (4), and the third O-type sealing ring (40) is pressed by the dust cover mounting plate (3) into the annular groove on the upper end surface of the dust cover mounting plate base (4); A fourth O-type sealing ring (41) is provided on the outer cylindrical surface of the inner edge of the flange lower end surface of the dust cover mounting plate base (4), and the fourth O-type sealing ring (41) is pressed by the bearing seat upper fixing plate (6) into the annular groove of the outer cylindrical surface of the inner edge of the flange lower end surface of the dust cover mounting plate base (4); A pressure ring (45) is fixed in the first step downward from the upper end surface of the dust cover mounting plate base 4; the flange lower end surface of the pressure ring (45) is in contact with the first step downward from the upper end surface of the dust cover mounting plate base (4), and the pressure ring (45) and the dust cover mounting plate base (4) are fixed by screws evenly distributed in the circumferential direction; A sealing spacer ring (44) is fixed in the second step downward from the upper end surface of the dust cover mounting plate base 4; the outer cylindrical surface of the sealing spacer ring (44) is in contact with the inner cylindrical surface of the second step downward from the upper end surface of the dust cover mounting plate base (4); a sixth O-ring (43), the sixth O-ring (43) being arranged below the pressure ring (45); under the pressing force of the pressure ring (45), the sixth O-ring (43) is pressed into a space surrounded by the pressure ring (45), the dust cover mounting plate base (4), the sealing spacer (44) and the rotating shaft (46); A fifth O-ring (42) is arranged below the sealing spacer (44). Under the pressing force of the sealing spacer (44), the fifth O-ring (42) is pressed into a space surrounded by the sealing spacer (44), the dust cover mounting plate base (4) and the rotating shaft (46).

6. The centrifugal turntable device of the induction skull furnace according to claim 1, characterized in that, The centrifugal turntable brake device (200) comprises: The bakelite brake pad (15) is arranged directly below the driven pulley 23 of the centrifugal turntable main shaft device (100); A brake chassis (16), wherein the lower end surface of the bakelite brake pad (15) is in contact with the upper end surface of the brake chassis (16); The brake support pedal (18) is arranged below the brake chassis (16); A small twisted shaft (20), the small twisted shaft (20) passing through the symmetrical axis hole on the brake support pedal 18 and the symmetrical axis hole on the brake chassis (16); A brake bracket (21), the brake bracket (21) being arranged below the brake support pedal 18; A large twisted shaft (19), the large twisted shaft (19) passing through the symmetrical axis holes on the two axis seats in the middle of the bottom of the brake support pedal (18) and the two symmetrical axis holes on the upper ends of the support plates on both sides of the brake bracket (21); A mounting and fixing base plate (22) is provided below the brake bracket (21), and the brake bracket (21) is fixed to the mounting and fixing base plate (22) by welding; A hanging plate (13), wherein the hanging plate (13) is fixed to a bottom cavity door frame plate of the melting and casting cavity (48) by welding; A brake spring (17), wherein the upper end of the brake spring (17) is hooked in the hanging hole of the hanging plate (13), and the lower end of the brake spring (17) is hooked in the hanging ear hole on the brake support pedal (18); The pedal end braking torque applied to the brake support pedal (18) is transmitted to the brake chassis (16) and the bakelite brake pad (15) through the brake support pedal (18); the centrifugal turntable spindle device (100) is braked by consuming mechanical energy through the relative friction between the bakelite brake pad (15) and the driven pulley (23).

7. The centrifugal turntable device of the induction skull furnace according to claim 6, characterized in that, The central axis of the inner cylindrical surface of the bakelite brake pad (15) coincides with the central axis of the inner cylindrical surface of the brake chassis (16), and the bakelite brake pad (15) and the brake chassis (16) are fastened together by screws evenly distributed in the circumferential direction; Symmetrical axial holes are provided on two symmetrical frame edges of the brake support pedal (18), and symmetrical axial holes are provided on two symmetrical axis seats of the brake chassis (16) and are coaxial with the axial holes on the brake support pedal (18); The two symmetrical frame edges of the brake support pedal (18) are respectively embedded in the middle of the two symmetrical axis seats of the brake chassis (16); The small twist shaft (20) is fixed to the brake chassis (16) via the retaining springs at both ends of the small twist shaft (20); The small twisted shaft (20) connects the brake chassis (16) and the brake support pedal (18), so that the brake chassis (16) and the brake support pedal (18) rotate relative to each other around the small twisted shaft (20); Two symmetrical shaft holes are provided on the upper ends of the support plates on both sides of the brake bracket (21); two shaft seats in the middle of the bottom of the brake support pedal (18) are provided with symmetrical shaft holes which are coaxial with the shaft holes on the brake bracket (21); the two symmetrical shaft seats in the middle of the bottom of the brake support pedal (18) are embedded in the middle of the upper ends of the support plates on both sides of the brake bracket (21); The large twisted shaft (19) is fixed to the brake bracket (21) via the retaining springs at both ends of the large twisted shaft (19); The large twisted shaft (19) connects the brake support pedal (18) and the brake bracket (21), so that the brake support pedal (18) rotates relatively around the large twisted shaft (19); The hanging plate (13) is provided with a hanging hole; and the brake support pedal (18) is provided with a hanging ear at a position close to the pedal end.

8. The centrifugal turntable device of the induction skull furnace according to claim 1, characterized in that, The centrifugal turntable driving device 300 further includes: An asynchronous motor (30) is fixed on one side of the melting and casting cavity (48) above a motor mounting pad (29); The bottom plane of the mounting flange of the asynchronous motor (30) is in contact with the upper end surface of the motor mounting pad (29); the protruding cylinder on the bottom plane of the mounting flange of the asynchronous motor 30 is embedded in the counterbore on the upper end surface of the motor mounting pad (29), and the bolt holes evenly distributed circumferentially on the mounting flange of the asynchronous motor (30) are aligned with the bolt holes evenly distributed circumferentially on the motor mounting pad (29). The motor mounting pad (29) is located above the frame mounting plate of the centrifugal turntable frame (14). The bottom plane of the motor mounting pad (29) is in contact with the upper end surface of the frame mounting plate of the centrifugal turntable frame (14). The driving pulley (28) is sleeved on the motor shaft at the lower end of the asynchronous motor (30). The V-belt (25), the two ends of the V-belt (25) are respectively nested in the V-belt grooves of the driving pulley (28) and the driven pulley (23); the driving pulley (28) transmits torque to the driven pulley (23) through the V-belt (25). The motor mounting pad (29), near one side of the motor mounting pad (29) facing the driven pulley (23), there is a motor tensioning block (27), and the motor tensioning block (27) is provided with a threaded hole and an adjusting bolt (26); by changing the protruding length of the adjusting bolt (26) on the motor tensioning block (27), the distance between the driving pulley (28) and the driven pulley (23) and the tension of the V-belt (25) are adjusted.

9. The centrifugal turntable device of the induction skull furnace according to claim 8, characterized in that The bolt holes evenly distributed circumferentially on the motor mounting pad (29) are respectively aligned with the kidney-shaped grooves on the frame mounting plate of the centrifugal turntable frame (14); the asynchronous motor (30), the motor mounting pad (29), and the centrifugal turntable frame (14) are fastened together by bolts evenly distributed circumferentially; the lower end surface of the driving pulley (28) is flush with the end surface of the motor shaft at the lower end of the asynchronous motor (30), and key grooves are provided in the inner hole of the driving pulley (28) and the motor shaft head at the lower end of the asynchronous motor (30) and are connected by flat keys, and the asynchronous motor (30) transmits torque to the driving pulley (28) through the flat keys.

10. The centrifugal turntable device of the induction skull furnace according to claim 1, characterized in that, The ingot shell furnace mold shell (49) is fixed on the centrifugal turntable (2); the melting crucible (47) is located above the ingot shell furnace mold shell (49) and the centrifugal turntable (2) and is installed on the tilting device in the melting and casting cavity and can be driven by the tilting device to make a flipping motion.

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