阅读说明：本技术 一种具有内置偏心旋转机构的连铸振动支撑辊 (Continuous casting vibration supporting roller with built-in eccentric rotating mechanism ) 是由 张慧 王明林 干勇 于 2019-11-13 设计创作，主要内容包括：本发明涉及金属凝固和连续铸造领域,特别是一种具有内置偏心旋转机构的旋转振动支撑辊。它包括振动支撑辊辊体(1)、外旋转轴(10)、外轴承座(12)、支撑座(13)和基体台架(18),所述连铸振动支撑辊还包括设置在振动支撑辊辊体(1)内的偏心旋转机构,所述偏心旋转机构包括内旋转轴(7),以及设置在内旋转轴(7)上的至少一个转子驱动件和至少一个偏心块(6)；所述旋转驱动件由流体动力源驱动旋转,驱动内旋转轴(7)以大于振动支撑辊辊体(1)的转速的速度快速转动,带动偏心块(6)旋转并产生可控制的振动,使得振动支撑辊辊体(1)产生垂直于铸坯(19)的坯壳的振动,进而使铸坯(19)的坯壳受力并产生振动。(The invention relates to the field of metal solidification and continuous casting, in particular to a rotary vibration support roller with a built-in eccentric rotating mechanism. The continuous casting vibration support roller comprises a vibration support roller body (1), an outer rotating shaft (10), an outer bearing seat (12), a support seat (13) and a base body rack (18), and further comprises an eccentric rotating mechanism arranged in the vibration support roller body (1), wherein the eccentric rotating mechanism comprises an inner rotating shaft (7), and at least one rotor driving piece and at least one eccentric block (6) which are arranged on the inner rotating shaft (7); the rotary driving part is driven to rotate by a fluid power source, the inner rotary shaft (7) is driven to rapidly rotate at a speed higher than the rotating speed of the vibration supporting roller body (1), the eccentric block (6) is driven to rotate and generate controllable vibration, the vibration supporting roller body (1) generates vibration perpendicular to the blank shell of the casting blank (19), and then the blank shell of the casting blank (19) is stressed and vibrates.)

1. The utility model provides a continuous casting vibration backing roll with built-in eccentric rotary mechanism, including vibration backing roll body (1), outer rotating shaft (10), outer bearing frame (12), supporting seat (13) and base member rack (18), be hollow structure with backing roll body (1) of casting blank (19) contact, its left and right sides respectively is equipped with an end cover (2), two outer rotating shaft (10) rigid couplings respectively on the outer wall of the end cover (2) of both sides to be connected with outer bearing frame (12) cooperation through outer bearing (11), install on base member rack (18) outer bearing frame (12) through elasticity supporting seat (13) that have guider, its characterized in that:

the continuous casting vibration supporting roller further comprises an eccentric rotating mechanism arranged in a vibration supporting roller body (1), wherein the eccentric rotating mechanism comprises an inner rotating shaft (7), and at least one rotor driving part and at least one eccentric block (6) which are arranged on the inner rotating shaft (7);

the inner rotating shaft (7) and the outer rotating shaft (10) are coaxially arranged on the inner wall of the end cover (2) on two sides of the vibration supporting roller body (1) in a rotatable mode through an inner bearing (8) and an inner bearing seat (9); the rotary driving part is driven to rotate by a fluid power source, the inner rotary shaft (7) is driven to rapidly rotate at a speed higher than the rotating speed of the vibration supporting roller body (1), the eccentric block (6) is driven to rotate and generate controllable vibration, the vibration supporting roller body (1) generates vibration perpendicular to the blank shell of the casting blank (19), and then the blank shell of the casting blank (19) is stressed and vibrates.

2. The continuous casting vibrating support roll with built-in eccentric rotating mechanism according to claim 1, characterized in that: the rotor driving part comprises a rotor shell (3), a rotor (4) and movable blades (5); the rotor shell (3) is a hollow cylinder, and the surface of the cylinder is fixedly connected with the inner wall of the vibration supporting roller body (1); the rotor shell (3) is an eccentric cylinder, so that the inner cavity of the rotor shell is a cylindrical space which is not coaxial with the inner rotating shaft (7); the rotor (4) is a cylinder, is arranged in the rotor shell (3) and is coaxially and fixedly connected to the inner rotating shaft (7); the rotor (4) is uniformly provided with a plurality of vane grooves (21) along the radial direction thereof on the circumferential surface, and the movable vanes (5) are freely telescopically arranged in the vane grooves (21).

3. The continuous casting vibrating support roller with built-in eccentric rotating mechanism according to claim 2, characterized in that: the wall thickness of the rotor housing (3) is uniformly transited from thick to thin along the radial direction of the rotor housing.

4. The continuous casting vibrating support roller with built-in eccentric rotating mechanism according to claim 2, characterized in that: the fluid power source is liquid or gas, and when the fluid power source is compressed gas, the fluid power source has the following gas path structure: an air inlet channel (14) and an air outlet channel (17) are respectively arranged on the outer rotating shaft (10), at least one radial air inlet hole (15) and at least one radial air outlet hole (22) for blowing the movable blade (5) to rotate are arranged on the rotor shell (3), and a central air inlet groove (16) communicated with each blade groove (21) is arranged on a central shaft of the rotor (4); the air inlet channel (14) is respectively communicated with the radial air inlet holes (15) and the central air inlet groove (16), and the air outlet channel (17) is communicated with the radial air outlet holes (22).

5. The continuous casting vibrating support roller with built-in eccentric rotating mechanism according to claim 4, characterized in that: the air inlet channel (14) and the air outlet channel (17) are respectively positioned on different outer rotating shafts (10).

6. The continuous casting vibrating support roll with built-in eccentric rotating mechanism according to claim 1, characterized in that: the rotor driving part comprises a rotor (4) and axial flow blades (20), the rotor (4) is a cylinder and is coaxially and fixedly connected to the inner rotating shaft (7); a plurality of axial flow blades (20) are uniformly fixed to the circumferential surface of the rotor (4).

7. The continuous casting vibrating support roller with built-in eccentric rotating mechanism according to claim 6, characterized in that: the fluid power source is liquid or gas, and when the fluid power source is compressed gas, the fluid power source has the following gas path structure: the outer rotating shaft (10) is respectively provided with an air inlet channel (14) and an air outlet channel (17), and the end cover (2) of the vibration supporting roller body (1) is respectively provided with a plurality of axial air inlets (23) and a plurality of axial air outlets (24) for blowing the rotation of the axial flow blades (20); the air inlet channel (14) is communicated with the axial air inlet hole (23), and the air outlet channel (17) is communicated with the axial air outlet hole (24).

8. The continuous casting vibrating support roller with built-in eccentric rotating mechanism according to claim 6, characterized in that: the air inlet channel (14) and the air outlet channel (17) are respectively positioned on different outer rotating shafts (10), and the axial air inlet hole (23) and the axial air outlet hole (24) are respectively positioned on different end covers (2).

9. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the weight of the eccentric block (6) is 3-40% of the weight of the vibration supporting roller body (1).

10. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: when in use, the vibration supporting rollers are arranged on one side, two symmetrical sides or multiple sides of the casting blank (19) on the same cross section position of the casting blank.

11. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the cross section of the vibration supporting roller body (1) is in one or a combination of a plurality of shapes of rectangle, trapezoid, step shape, circular shape, convex arc shape and concave arc shape.

12. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: when in use, the vibrating support roller is arranged at the lower end of the outlet of the crystallizer of the continuous casting machine, and/or in the secondary cooling area, and/or at the solidification tail end of a casting blank (19).

13. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the medium pressure of the power source is 0.2-15 MPa.

14. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the vibration frequency of the vibration supporting roller is 5-1000 Hz, and the vibration amplitude is 0.001-2.0 mm.

15. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the width L1 of the working surface of the vibration supporting roller body (1) in contact with the casting blank (19) is 30-120% of the width L of the casting blank.

16. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: and a water cooling channel is arranged inside the vibration supporting roller body 1.

17. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the vibration supporting roller is suitable for square billets, rectangular billets, plate blanks and round billets.

18. Continuous casting oscillating support roll with built-in eccentric rotation mechanism according to any of claims 1 to 8, characterized in that: the diameter D of the vibration supporting roller is 60-550 mm.

Technical Field

The invention relates to the field of metal solidification and continuous casting, in particular to a continuous casting vibration support roller with a built-in eccentric rotating mechanism.

Background

With the development of world metallurgical technology, the modern continuous casting technology is continuously improved, the castable steel variety is continuously expanded, and some high-alloy and high-quality special steels are continuously produced in the continuous casting production flow of large-scale iron and steel enterprises. In order to solve the problems of solidification segregation, shrinkage cavity defects and the like of special steel, metallurgical technologists develop a plurality of patents and technologies in the aspect of the technology for a long time. At present, the electromagnetic stirring technology and the solidification tail end soft reduction or cast rolling technology are mainly applied to industrial production in a large scale.

The electromagnetic stirring technology such as crystallizer electromagnetic stirring is that an electromagnetic induction coil or a stirrer is placed at the outer side of a continuous casting crystallizer, when alternating current with certain frequency is introduced into the electromagnetic induction coil or the stirrer, an electromagnetic field is generated, the magnetic field penetrates through a crystallizer copper plate and a metal solidified shell and generates induced current in liquid metal, the liquid metal is equivalent to a current carrier, the current carrier is acted by the magnetic field, electromagnetic force is generated in the current carrier, so that forced convection is generated in the liquid metal, the flowing liquid metal scours the front edge of the solidified shell and breaks and crushes dendrites, and the broken and crushed dendrites become cores of later equiaxial crystal growth, so that the aim of improving the equiaxial crystal rate of a casting blank by the electromagnetic stirrer is fulfilled.

The application of the electromagnetic stirrer is an effective method for improving the internal quality of a casting blank. Firstly, the electromagnetic stirring is easy to cause the casting blank to generate a white bright band or a negative segregation band, thereby influencing the uniformity of the performance of the casting blank; and secondly, the energy loss of the electromagnetic stirrer after penetrating through the metal billet shell is large, and the energy loss of the electromagnetic field after penetrating through the metal shell is larger along with the thickening of the continuous casting billet shell. The effect of the electromagnetic stirrer on the solidification end position of the cast strand is less pronounced than when the electromagnetic stirrer is placed in the mold.

Thereby, a solidification end soft reduction technology is developed. The method is characterized in that the core of a casting blank which is not completely solidified is compacted by a mechanical deformation method so as to improve the core segregation of the casting blank. However, the solidification end of the cast slab is subjected to a large reduction force, which tends to cause reduction cracking.

In recent years, new methods for effectively improving defects such as segregation, porosity and shrinkage at the center of a cast slab have appeared. For example, the invention patent 'a method for improving the quality of a slab and a vibrating support roller device' previously filed by the applicant of the present application (application No.200410069058.8, publication No. CN 1256203C); and 'a control device for casting blank quality and improving middle and later stage solid-liquid two-phase region fluidity in the continuous casting solidification process' CN208116707U, the documents give out that the vibration mode is adopted to apply the vibration force to the solidified blank shell, and the purpose is to promote the fracture of dendrite at the solidification front in the blank shell and increase the central isometric crystal rate of the casting blank; on the other hand, defects such as segregation, porosity, and shrinkage at the center of the cast slab are improved at the final stage of solidification. However, the above patents only provide technical ideas, and do not provide structural solutions for devices to achieve the above functions. Particularly, under the premise that the supporting function of the vibration supporting roller is ensured by what structure, effective vibration of the solidified shell becomes a technical problem to be solved urgently.

Disclosure of Invention

In view of the above technical problems, it is an object of the present invention to provide a continuous casting vibrating support roll with a built-in eccentric rotating mechanism, which generates periodic reciprocating vibration applied to a cast strand contacting a roll body by a fluid-driven rotor in cooperation with an eccentric mass provided on a shaft.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a continuous casting vibration backing roll with built-in eccentric rotary mechanism, includes vibration backing roll body 1, outer rotating shaft 10, outer bearing frame 12, supporting seat 13 and base member rack 18, is hollow structure with backing roll body 1 of casting blank 19 contact, and its each side is equipped with an end cover 2, and two outer rotating shafts 10 rigid couplings are on the outer wall of the end cover 2 of both sides respectively to be connected through outer bearing 11 and outer bearing frame 12 cooperation, outer bearing frame 12 is installed on base member rack 18 through the elasticity supporting seat 13 that has guider.

The continuous casting vibration supporting roller further comprises an eccentric rotating mechanism arranged in the vibration supporting roller body 1, wherein the eccentric rotating mechanism comprises an inner rotating shaft 7, and at least one rotor driving part and at least one eccentric block 6 which are arranged on the inner rotating shaft 7.

The inner rotating shaft 7 and the outer rotating shaft 10 are coaxially arranged on the inner wall of the end cover 2 at two sides of the vibration supporting roller body 1 in a rotatable mode through an inner bearing 8 and an inner bearing seat 9; the rotary driving part is driven to rotate by a fluid power source, the inner rotating shaft 7 is driven to rapidly rotate at a speed higher than the rotating speed of the vibration supporting roller body 1, the eccentric block 6 is driven to rotate and generate controllable vibration, the vibration supporting roller body 1 generates vibration perpendicular to the blank shell of the casting blank 19, and then the blank shell of the casting blank 19 is stressed and generates vibration.

The rotor driving part comprises a rotor shell 3, a rotor 4 and movable blades 5; the rotor shell 3 is a hollow cylinder, and the surface of the cylinder is fixedly connected with the inner wall of the vibration supporting roller body 1; the rotor shell 3 is an eccentric cylinder, so that the inner cavity of the rotor shell is a cylindrical space which is not coaxial with the inner rotating shaft 7; the rotor 4 is a cylinder, is arranged in the rotor shell 3 and is coaxially and fixedly connected to the inner rotating shaft 7; the rotor 4 is uniformly provided on its circumferential surface with a plurality of vane grooves 21 along its radial direction, and the movable vanes 5 are freely telescopically arranged in the vane grooves 21.

The wall thickness of the rotor housing 3 transitions uniformly from thick to thin in the radial direction thereof.

The fluid power source is liquid or gas, and when the fluid power source is compressed gas, the fluid power source has the following gas path structure: the outer rotating shaft 10 is respectively provided with an air inlet channel 14 and an air outlet channel 17, the rotor shell 3 is provided with at least one radial air inlet hole 15 and at least one radial air outlet hole 22 for blowing the movable blade 5 to rotate, and the central shaft of the rotor 4 is provided with a central air inlet groove 16 communicated with each blade groove 21; the air inlet channel 14 is respectively communicated with a radial air inlet hole 15 and a central air inlet groove 16, and the air outlet channel 17 is communicated with a radial air outlet hole 22.

The inlet channels 14 and outlet channels 17 are located on different outer rotational axes 10, respectively.

The rotor driving part comprises a rotor 4 and axial flow blades 20, the rotor 4 is a cylinder and is coaxially and fixedly connected to the inner rotating shaft 7; a plurality of axial-flow blades 20 are uniformly fixed on the circumferential surface of the rotor 4.

The fluid power source is liquid or gas, and when the fluid power source is compressed gas, the fluid power source has the following gas path structure: the outer rotating shaft 10 is respectively provided with an air inlet channel 14 and an air outlet channel 17, and the end cover 2 of the vibration supporting roller body 1 is respectively provided with a plurality of axial air inlet holes 23 and a plurality of axial air outlet holes 24 for blowing the rotation of the axial flow blades 20; the air inlet channel 14 is communicated with an axial air inlet hole 23, and the air outlet channel 17 is communicated with an axial air outlet hole 24.

The air inlet channel 14 and the air outlet channel 17 are respectively located on different outer rotating shafts 10, and the axial air inlet hole 23 and the axial air outlet hole 24 are respectively located on different end covers 2.

The weight of the eccentric block 6 is 3-40% of the weight of the vibration supporting roller body 1.

When in use, the vibration supporting rollers are arranged on one side, two symmetrical sides or multiple sides of the casting blank 19 on the same cross section position of the casting blank.

The cross section of the vibration supporting roller body 1 is in one or a combination of a plurality of shapes of rectangle, trapezoid, step shape, round shape, convex arc shape and concave arc shape.

When in use, the vibration supporting roller is arranged at the lower end of the outlet of the crystallizer of the continuous casting machine, and/or in the secondary cooling area, and/or at the solidification tail end of the casting blank 19.

The medium pressure of the power source is 0.2-15 MPa.

The vibration frequency of the vibration supporting roller is 5-1000 Hz, and the vibration amplitude is 0.001-2.0 mm.

The width L1 of the working surface of the vibration supporting roller body 1 in contact with the casting blank 19 is 30-120% of the width L of the casting blank.

And a water cooling channel is arranged inside the vibration supporting roller body 1.

The vibration supporting roller is suitable for square billets, rectangular billets, plate blanks and round billets.

The diameter D of the vibration supporting roller is 60-550 mm.

Compared with the prior art, the invention has the beneficial effects that:

due to the adoption of the eccentric block and the elastic supporting seat, the rapid rotation of the rotor can enable the vibration supporting roller to generate periodic reciprocating vibration which is applied to a casting blank contacted with the roller body, so that the solidified shell is stressed in the thickness direction and vibrates along with the rotatable vibration supporting roller. The device can break off the front ends of dendrites at the front edge of the primary solidified shell in a large quantity and becomes a source of central isometric crystals; the cast slab at the later stage of solidification can also be treated to break coarse central equiaxed crystals and refine the solidification structure. And the compressed gas is adopted for driving, so that the device is more energy-saving and convenient to maintain compared with the traditional nucleation technology.

Drawings

FIG. 1 is a schematic structural diagram of a continuous casting vibrating support roll with a built-in eccentric rotating mechanism in embodiment 1 of the invention;

FIG. 2 is a schematic structural diagram of example 2 of the present invention;

FIG. 3 is a schematic structural view of a center section of a vibration supporting roller according to embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of a continuous casting oscillating supporting roll with fixed blades in example 3 of the present invention;

FIG. 5 is a schematic structural view of a center section of a vibration supporting roller according to embodiment 3 of the present invention;

6 a-6 c are layout diagrams of the vibrating support roller of the invention on any cross section of a casting blank;

fig. 7a and 7b are schematic cross-sectional views of the oscillating support roller body 1 according to the present invention.

Wherein the reference numerals are:

1 vibration supporting roller body

2 end cap

3 rotor housing

4 rotor

5 Movable blade

6 eccentric block

7 inner rotating shaft

8 inner bearing

9 inner bearing seat

10 outer rotating shaft

11 outer bearing

12 outer bearing seat

13 supporting seat

14 air intake passage

15 radial air inlet

16 center air inlet groove

17 air outlet channel

18 base body rack

19 casting blank

20 axial flow blade

21 blade groove

22 radial air outlet holes

23 axial air intake

24 axial air outlet

Working face width of L1 vibration supporting roller in contact with casting blank

L width of casting blank

D diameter of rotary vibration supporting roller

Detailed Description

The invention is further illustrated with reference to the following figures and examples.