Converter bearing seat vibration reduction supporting device, converter supporting system and converter

Abstract

The invention relates to a converter bearing seat vibration reduction supporting device, a converter supporting system and a converter, and belongs to the field of mechanical engineering. The vibration reduction supporting device comprises a fixed base and a floating base which are arranged on the two sides of the converter, the fixed base and the floating base are connected with a fixed end bearing seat and a floating end bearing seat correspondingly, and at least one vibration reduction mechanism is connected to the floating end bearing seat; the vibration reduction mechanism comprises a connecting rod hinged to the floating base and a telescopic rod hinged to the installation foundation, and the spring buffer is connected with the connecting rod and the telescopic rod in a pre-compression installation mode so as to resist vibration impact borne by the floating end bearing seat. And the spring buffer configures the pre-compression amount of the spring in a manner that the pre-tightening force is 1 / 10 of the radial static load of the converter bearing. When the damping mechanism is installed, the included angle theta formed by the axes of the connecting rod and the floating base ranges from 20 degrees to 90 degrees. The vibration reduction mechanism is introduced to restrain the converter from vibrating in the axial direction of the trunnion, and therefore damage of vibration to equipment parts or a converter foundation is reduced.

Description

Technical Field

[0001] The invention belongs to the field of mechanical engineering and relates to a converter bearing seat vibration reduction support device, a converter support system and a converter. Background Art

[0002] During the converter steelmaking process, oxygen is sprayed into the molten iron pool in the furnace for smelting. At present, most steelmaking converters at home and abroad adopt the top blowing method, that is, oxygen is blown into the molten iron pool from the top through the top gun; while the AOD converter used for stainless steel smelting often adopts the side blowing method, that is, oxygen is sprayed from the side of the furnace body. In recent years, with the increase in demand for high-quality steel and the increase in the amount of scrap steel used in the converter process, oxygen bottom blowing converter technology, that is, the smelting method in which oxygen is sprayed from the bottom of the converter, has received increasing attention.

[0003] In the process of oxygen spraying into the molten pool, the kinetic energy of the gas and the work done by its expansion in the high-temperature solution after being sprayed will cause irregular oscillations of the molten liquid in the furnace, which in turn will produce multi-directional impact forces on the furnace body, causing the overall vibration of the converter equipment. This equipment vibration caused by the blowing of process gases such as oxygen is a common problem faced by various converter smelting methods, especially in the side-blowing and bottom-blowing processes. The vibration not only causes the equipment to shake significantly along the axial direction of the ear shaft, but also causes resonance when the gas excitation and melt oscillation frequency are close to the natural frequency of the equipment, accelerating accidents such as damage to equipment components and cracking of the foundation, seriously threatening the service life and production safety of the converter.

[0004] like Figure 1 As shown, the existing converter support system usually includes a support ring, an ear shaft and two sets of bearings installed on the ear shaft. The two sets of bearings are installed in the bearing seats on both sides of the converter respectively. The lower part of the bearing seat is connected to the base, and the base is fixed to the converter foundation. Generally speaking, the bearing seat on one side of the converter is connected to the fixed base, and the bearing seat on the other side is connected to the floating base to adapt to the load borne by the converter during use and the axial deformation of the support ring ear shaft after heating. Correspondingly, the bearing seat connected to the fixed base is the fixed end bearing seat, and the bearing seat connected to the floating base is the floating end bearing seat. However, during the converter smelting process, the furnace body vibration caused by the injection of gas will cause the ear shaft to have a large axial displacement in the floating end bearing seat, causing the floating end bearing seat to exhibit periodic floating. This vibration may even damage the pipelines and plant structures around the bearing seat. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a converter bearing seat vibration-damping support device, a converter support system and a converter, by arranging a vibration-damping mechanism to constrain the axial vibration of the converter along the ear shaft, thereby reducing the impact damage of vibration on equipment parts or the converter foundation.

[0006] To achieve the above-mentioned objectives, in a first aspect, the present invention provides the following vibration-damping support device for a converter bearing seat, comprising a fixed base and a floating base arranged on both sides of the converter, the fixed base and the floating base being connected to the fixed-end bearing seat and the floating-end bearing seat respectively, and at least one set of vibration-damping mechanism being connected to the floating base; the vibration-damping mechanism comprising a connecting rod hinged to the floating base and a telescopic rod hinged to the mounting base, and the spring buffer being connected to the connecting rod and the telescopic rod in a pre-compressed installation manner to resist the vibration impact on the floating-end bearing seat.

[0007] Optionally, the spring buffer is configured with a pre-compression amount of the spring in such a way that the preload force is 1 / 10 of the radial static load of the converter bearing.

[0008] Optionally, the floating base includes a connecting support for supporting the floating end bearing seat, the connecting support is hinged to the converter foundation; the connecting support is configured to rotate around the hinge point and / or twist around its own axis.

[0009] Optionally, the connecting support is hinged to the converter foundation through a rotating pin. Specifically, the pin base is fixed to the converter foundation, the connecting support is hinged to the pin base, and the rotating pin passes through the connecting support and the pin base horizontally along the radial direction of the floating end bearing seat.

[0010] Optionally, the connecting support is hinged to the converter foundation through a rotating pin and a spherical bearing, and the spherical bearing is sleeved on the rotating pin. Specifically, the pin base is fixed to the converter foundation, the spherical bearing is arranged at the bottom of the connecting support, the connecting support is hinged to the pin base through the spherical bearing, and the rotating pin horizontally passes through the pin base, the connecting support and the spherical bearing along the radial direction of the floating end bearing seat.

[0011] Optionally, a hinged support is fixedly provided on the side of the connecting support away from the converter, one end of the connecting rod is hinged to the hinged support and pivots around the hinged support, and the other end of the connecting rod is connected to the spring buffer.

[0012] Optionally, the support base is fixed to the mounting base, one end of the telescopic rod is connected to the spring buffer, and the other end is hinged to the support base and pivots around the support base.

[0013] Optionally, when installing the vibration reduction mechanism, the connecting rod and the floating base are constructed so that the angle θ formed by the axes of the two is between 20° and 90°.

[0014] In the second aspect, the present invention provides a converter support system, comprising a support ring arranged on the surface of the furnace body of the converter and ear shafts connected to both sides of the support ring; bearings are arranged at both ends of the ear shaft, and the two bearings are respectively installed on the floating end bearing seat and the fixed end bearing seat. The converter support system also includes the above-mentioned converter bearing seat vibration reduction support device, the fixed end bearing seat and the floating end bearing seat are respectively installed on the fixed base and the floating base, and at least one group of vibration reduction mechanisms of the converter bearing seat vibration reduction support device is connected to the floating base. .

[0015] In a third aspect, the present invention provides a converter, comprising a converter body and the aforementioned supporting system arranged on the converter.

[0016] The beneficial effects of the present invention are:

[0017] First, the present invention significantly improves the stability of converter operation by introducing a vibration reduction mechanism. During the converter smelting process, the vibration of the furnace body caused by oxygen injection is inevitable. Traditional support systems are often unable to effectively resist such vibrations, resulting in problems such as equipment shaking and component damage. The present invention provides a vibration reduction mechanism on the floating end bearing seat, and through the cooperation of a connecting rod, a telescopic rod and a spring buffer, effective absorption and dispersion of vibrations are achieved. The spring buffer is installed in a pre-compressed manner, so that when the furnace body vibrates, the spring buffer first uses its own elastic force to resist the vibration. When the equipment vibrates, it must first overcome the preload force of the spring before further displacement or deformation can occur, thereby reducing the shaking amplitude of the equipment and improving the overall stability. In particular, for equipment such as side-blown AOD converters and large-flow bottom-blown converters that vibrate more violently during the smelting process, the vibration reduction effect of the vibration reduction mechanism of the present invention is more obvious.

[0018] Secondly, the floating end bearing seat of the present invention is configured to have a certain degree of rotation and torsion freedom to better adapt to the complex vibration conditions that may occur during the converter production process. The vibration reduction mechanism cooperates with the floating end bearing seat to limit the rotation and torsion in the floating end bearing, so that the support system can adapt to the vibration characteristics of the converter while limiting the vibration amplitude, thereby improving the stability of the equipment operation and avoiding excessive vibration amplitude or resonance that may cause equipment damage or safety accidents.

[0019] In addition, the vibration reduction support device of the present invention is easy to install and debug, and has good adaptability and flexibility. Whether in the vibration-proof transformation of an existing converter or in the design of a new converter, the vibration reduction support device can be installed on the converter bearing seat base through simple welding and bolting. During use, the preload of the spring buffer can also be adjusted according to actual conditions to obtain the best vibration reduction effect.

[0020] In summary, the technical effects of the present invention are mainly reflected in improving the stability of converter equipment, optimizing vibration characteristics, facilitating installation and debugging, etc. Through reasonable structural design and appropriate reasoning process, the present invention successfully solves the problems of equipment shaking and component damage caused by vibration during converter smelting, and provides a strong guarantee for the safe and efficient operation of the converter.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a structural schematic diagram of a converter support system in the prior art;

[0024] Figure 2 A schematic diagram of the structure of a converter bearing seat vibration reduction support device, a converter support system and a converter provided by the present invention;

[0025] Figure 3 One of the structural schematic diagrams of the vibration reduction mechanism of the vibration reduction support device for the converter bearing seat provided by the present invention;

[0026] Figure 4 This is a second structural schematic diagram of the vibration reduction mechanism of the converter bearing seat vibration reduction support device provided by the present invention.

[0027] Reference numerals:

[0028] 100-converter; 200-support system; 210-support ring; 220-ear shaft; 230-bearing; 240-bearing seat; 241-fixed end bearing seat; 242-floating end bearing seat; 250-vibration reduction support device; 251-fixed base; 252-floating base; 252.1-connecting support; 252.2-spherical bearing seat; 252.3-spherical bearing; 252.4-rotating pin; 252.5-pin base; 253-vibration reduction mechanism; 253.1-hinged support; 253.2-connecting rod; 253.3-spring buffer; 253.4-telescopic rod; 253.5-support base; 253.6-anchor bolt; 300-converter foundation. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] During the converter steelmaking process, oxygen is sprayed into the molten iron pool in the furnace for smelting. During this process, the kinetic energy of the gas and the work done by its expansion in the high-temperature solution after being sprayed will cause irregular oscillations of the molten liquid in the furnace, which in turn will produce multi-directional impact forces on the furnace body and cause the overall vibration of the converter equipment.

[0033] like Figure 1As shown, the support system 200 of the existing converter 100 generally includes a support ring 210, an ear shaft 220, and two sets of bearings 230 installed on the ear shaft 220. The two sets of bearings 230 are respectively installed in the bearing seats 240 on both sides of the converter 100. The lower part of the bearing seat 240 is connected to the base, and the base is fixed on the converter foundation 300. Generally speaking, the bearing seat 240 on one side of the converter 100 is connected to the fixed base 251, and the bearing seat 240 on the other side is connected to the floating base 252 to adapt to the load borne by the converter 100 during use and the axial deformation of the ear shaft 220 of the support ring 210 after heating. Accordingly, the bearing seat 240 connected to the fixed base 251 is the fixed end bearing seat 241, and the bearing seat 240 connected to the floating base 252 is the floating end bearing seat 242.

[0034] However, during the smelting process of the converter 100, the furnace body vibration caused by the injected gas will cause the ear shaft 220 to produce a large axial displacement in the floating end bearing seat 242, causing the floating end bearing seat 242 to exhibit periodic floating. This vibration may even damage the pipelines and plant structures around the bearing seat 240.

[0035] In order to restrict the axial vibration of the converter 100 along the ear shaft 220 and reduce the impact of the vibration on the equipment parts or the converter foundation 300, the present invention provides a converter bearing seat vibration reduction support device 250. Figure 2-3 As shown, the converter bearing seat vibration reduction support device 250 includes a fixed base 251 and a floating base 252 disposed on both sides of the converter 100, and the fixed base 251 and the floating base 252 are respectively connected to the fixed end bearing seat 241 and the floating end bearing seat 242. The converter bearing seat vibration reduction support device 250 also includes at least one set of vibration reduction mechanisms 253, which are connected to the floating base 252 to limit the vibration of the floating end bearing seat 242 along the axial direction of the ear shaft 220.

[0036] Furthermore, the floating base 252 includes a connecting support 252.1 for supporting the floating end bearing seat 242, the connecting support 252.1 is hinged to the converter foundation 300, and the vibration reduction mechanism 253 is connected to the connecting support 252.1. The connecting support 252.1 is configured to rotate around the hinge point and / or twist around its own axis to adapt to the multi-directional and multi-frequency vibration conditions that the floating end bearing seat 242 may face during the production process of the converter 100. Preferably, the rotation plane of the connecting support 252.1 when rotating around the hinge point is parallel to the axial direction of the floating end bearing seat 242, which is more conducive to cooperating with the vibration reduction mechanism 253 to resist the axial impact force received by the floating end bearing seat 242.

[0037] In some optional embodiments, the pin base 252.5 is fixed to the converter foundation 300, the connecting support 252.1 is hinged to the pin base 252.5, and the rotating pin 252.4 passes through the connecting support 252.1 and the pin base 252.5 horizontally along the radial direction of the floating end bearing seat 242. At this time, the floating base 252 only has rotational freedom.

[0038] Preferably, in another embodiment, the pin base 252.5 is fixed to the converter foundation 300, the spherical bearing 252.3 is arranged at the bottom of the connecting support 252.1, the connecting support 252.1 is hinged to the pin base 252.5 through the spherical bearing 252.3, and the rotating pin 252.4 passes through the pin base 252.5, the connecting support 252.1 and the spherical bearing 252.3 horizontally along the radial direction of the floating end bearing seat 242. At this time, the floating base 252 has both rotational freedom and torsional freedom.

[0039] The vibration reduction mechanism 253 includes a connecting rod 253.2 and a telescopic rod 253.4, and a spring buffer 253.3 is connected to the connecting rod 253.2 and the telescopic rod 253.4 in a pre-compression installation manner, so that the pre-tightening force of the spring buffer 253.3 along the axial direction of the ear shaft 220 is sufficient to resist the vibration impact of the floating end bearing seat 242 along the axial direction of the ear shaft 220. Specifically, a hinged support 253.1 is fixedly provided on the side of the connecting support 252.1 away from the converter 100, one end of the connecting rod 253.2 is hinged to the hinged support 253.1 and rotates around the hinged support 253.1, and the other end of the connecting rod 253.2 is connected to the spring buffer 253.3. The support base 253.5 is fixed in the installation base by anchor bolts 253.6 embedded or pre-embedded in the installation base, and one end of the telescopic rod 253.4 is connected to the spring buffer 253.3, and the other end is hinged to the support base 253.5 and rotates around the support base 253.5. It can be understood that the above-mentioned installation base can be a converter foundation 300 or other basic structure with supporting capacity.

[0040] When installing the vibration reduction mechanism 253, the axis of the connecting rod 253.2 and the floating base 252 form a certain angle θ, and the value of the angle θ can be 0<θ<180°. Theoretically, the closer θ is to 90°, the more obvious the vibration reduction effect on the floating end bearing seat 242. For example, if the installation base of the vibration reduction mechanism 253 is a vertical structure perpendicular to the converter foundation 300, the installation angle θ of the vibration reduction mechanism 253 can reach 90°. However, considering the actual installation conditions of the general converter 100 equipment site, the vibration reduction mechanism 253 is usually installed on the converter foundation 300. Accordingly, θ is preferably 20°≤θ≤50°, and a comprehensive analysis should be conducted according to the magnitude of the axial force of the floating end bearing seat 242 and the actual installation space of the converter foundation 300.

[0041] When installing the vibration reduction mechanism 253, the spring in the spring buffer 253.3 is compressed by adjusting the length of the telescopic rod 253.4, so that the spring buffer 253.3 has a certain preload force, so that when the furnace body vibrates, the spring buffer 253.3 first uses its own elastic force to resist the vibration. When the equipment vibrates, it must first overcome the preload force of the spring before further displacement or deformation can occur, thereby reducing the shaking amplitude of the equipment and improving the overall stability. Preferably, the preload force of the spring buffer 253.3 is 1 / 10 of the radial static load of the converter bearing 230.

[0042] The converter bearing seat vibration reduction support device 250 provided by the present invention can be used for the transformation of an existing converter 100, and can also be used for the support system 200 of a newly built converter 100. The hinged support 253.1 is welded to the side of the floating base 252, and the support base 253.5 is installed on the converter foundation 300 through the embedded anchor bolts 253.6, and then the connecting rod 253.2 is hinged to the hinged support 253.1, the telescopic rod 253.4 is hinged to the support base 253.5, and the length of the telescopic rod 253.4 is adjusted to adjust the preload force of the spring buffer 253.3.

[0043] In some optional embodiments, the floating end bearing seat 242 may be provided with two groups of vibration damping mechanisms 253. Depending on the actual application, in order to achieve a better vibration damping effect, an even number of vibration damping mechanisms 253 such as 4 groups, 6 groups, or 8 groups may also be provided, and the even number of vibration damping mechanisms 253 are symmetrically arranged relative to the axis of the floating end bearing seat 242.

[0044] The present invention provides a converter support system 200, comprising a support ring 210 arranged on the surface of the furnace body of the converter 100 and an ear shaft 220 connected to both sides of the support ring 210; bearings 230 are arranged at both ends of the ear shaft 220, and the two bearings 230 are respectively installed on the floating end bearing seat 242 and the fixed end bearing seat 241; the aforementioned converter bearing seat vibration reduction support device 250 is installed on the floating end bearing seat 242 and the fixed end bearing seat 241.

[0045] The present invention provides a converter 100 , including a converter body and the aforementioned supporting system 200 disposed on the converter 100 .

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A vibration-damping support device for a converter bearing seat, comprising a fixed base (251) and a floating base (252) arranged on both sides of a converter (100), wherein the fixed base (251) and the floating base (252) are respectively connected to a fixed-end bearing seat (241) and a floating-end bearing seat (242); characterized in that: At least one set of vibration reduction mechanisms (253) is connected to the floating base (252); The vibration reduction mechanism (253) comprises a connecting rod (253.2) hinged to the floating base (252) and a telescopic rod (253.4) hinged to the mounting base, and a spring buffer (253.3) connects the connecting rod (253.2) and the telescopic rod (253.4) in a pre-compression mounting manner to resist vibration impact on the floating end bearing seat (242).

2. The vibration-damping support device for a converter bearing seat according to claim 1, characterized in that: The spring buffer (253.3) is configured with a pre-compression amount of the spring in such a way that the pre-tightening force is 1 / 10 of the radial static load of the converter (100) bearing.

3. The vibration-damping support device for a converter bearing seat according to claim 1, characterized in that: The floating base (252) includes a connecting support (252.1) for supporting the floating end bearing seat (242), and the connecting support (252.1) is hinged to the converter foundation (300); the connecting support (252.1) is configured to rotate around a hinge point and / or twist around its own axis.

4. The vibration-damping support device for a converter bearing seat according to claim 3 is characterized in that: The connecting support (252.1) is hinged to the converter foundation (300) via a rotating pin (252.4).

5. The vibration-damping support device for a converter bearing seat according to claim 3, characterized in that: The connecting support (252.1) is hinged to the converter foundation (300) via a rotating pin (252.4) and a spherical bearing (252.3), and the spherical bearing (252.3) is sleeved on the rotating pin (252.4).

6. The vibration-damping support device for a converter bearing seat according to claim 3, characterized in that: A hinged support (253.1) is fixedly provided on the side of the connecting support (252.1) away from the converter (100), one end of the connecting rod (253.2) is hinged to the hinged support (253.1) and rotates around the hinged support (253.1), and the other end of the connecting rod (253.2) is connected to the spring buffer (253.3).

7. The vibration-damping support device for a converter bearing seat according to claim 6, characterized in that: The support base (253.5) is fixedly arranged on the installation base; one end of the telescopic rod (253.4) is connected to the spring buffer (253.3), and the other end is hinged to the support base (253.5) and rotates around the support base (253.5).

8. The vibration-damping support device for a converter bearing seat according to claim 1, characterized in that: When the vibration reduction mechanism (253) is installed, the connecting rod (253.2) and the floating base (252) are constructed such that the angle θ formed by their axes is between 20° and 90°.

9. A converter support system, comprising a support ring (210) arranged on the surface of a furnace body of a converter (100) and ear shafts (220) connected to both sides of the support ring (210); bearings (230) are arranged at both ends of the ear shaft (220), and the two bearings (230) are respectively mounted on a fixed end bearing seat (241) and a floating end bearing seat (242); characterized in that: It also includes the converter bearing seat vibration reduction support device according to any one of claims 1 to 8; The fixed end bearing seat (241) and the floating end bearing seat (242) are respectively mounted on the fixed base (251) and the floating base (252), and at least one group of the vibration reduction mechanisms (253) of the converter bearing seat vibration reduction support device is connected to the floating base (252).

10. A converter, characterized in that: The invention comprises a furnace body, and the supporting system according to claim 9 arranged on the furnace body.

Images