Supporting device for tilting speed reducer of converter

Abstract

The invention belongs to the field of mechanical engineering, and relates to a converter tilting speed reducer supporting device, which consists of a support, an adjusting gasket, a spring buffer and a top plate, and is symmetrically arranged at the lower part of a secondary speed reducer. By applying the pre-tightening force, the device can effectively reduce the vibration of the converter in the circumferential direction of the trunnion, especially the violent stirring condition of an AOD converter and a large-flow bottom blowing process converter. The device is reasonable in design, easy and convenient to install, suitable for a newly-built converter and capable of being used for vibration reduction transformation of an existing converter, remarkably improves the operation stability of the converter, enhances the safety of equipment and a foundation, prolongs the service life of the converter and ancillary facilities of the converter, and reduces the maintenance cost.

Description

Technical Field

[0001] The invention belongs to the field of mechanical engineering and relates to a supporting device for a converter tilting reducer. Background Art

[0002] The converter steelmaking production requires oxygen to be 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 in which oxygen is blown into the molten pool through the top gun; the AOD converter for smelting stainless steel generally adopts the side blowing method in which oxygen is sprayed into the side of the furnace body; with the increasing demand for quality steel smelting and adding more scrap steel to the converter process in recent years, the oxygen bottom blowing converter that is more suitable for this working condition, that is, the converter smelting technology in which oxygen is sprayed into the bottom of the converter, has received more and more attention. In the process of spraying oxygen into the molten pool in the above-mentioned converter production, the kinetic energy of the gas itself, as well as the expansion work after it is sprayed into the high-temperature solution, will cause irregular oscillation of the solution in the furnace, exerting impact forces in different directions on the furnace body, thereby causing vibration of the converter equipment as a whole. This phenomenon of converter equipment vibration caused by the blowing of process gases such as oxygen is difficult to completely avoid in various converter smelting methods at present, and is more obvious in the above-mentioned smelting process in which oxygen is sprayed from the side and bottom. Vibration causes the equipment to shake greatly in the circumferential direction around the ear axis (torsional vibration). When the gas excitation and solution oscillation frequency are close to the natural frequency of the equipment, resonance will also occur, leading to accelerated damage to equipment components, foundation cracking and other accidents, seriously affecting the life of the converter equipment and production safety.

[0003] The steelmaking converter drives the furnace body to rotate through the tilting device. It has to drive the furnace body load of thousands of tons or even more, and needs to be started and stopped frequently. This requires the tilting device to be able to output the torque required to drive the heavy load, and to be able to reliably transmit the generated reaction torque and impact force to the converter foundation. The converter tilting device usually adopts a multi-point meshing full suspension-torsion bar balancing structure, with several primary reducers installed on the secondary reducer (the attached figure of the present invention shows four primary reducers), and the whole is fully suspended on the support ring ear shaft. The lower torsion bar device is connected to the housing of the secondary reducer through a connecting rod mechanism, which is used to balance the reaction torque and impact force during the tilting process of the converter. In practical applications, there are certain clearances between the connecting rod mechanism and the secondary reducer, the connecting rod mechanism and the torsion bar, and the internal components of the torsion bar device due to the need for manufacturing and installation. During the long-term operation of the converter, these clearances will gradually increase due to impact, heavy load and wear, resulting in a large impact force before the connecting rod transmits the converter tilting torque to the torsion bar. As the converter is used for a longer time, the impact force will also increase, which is manifested as an increasingly loud impact sound when the converter tilts and the overall swing of the converter equipment around the ear axis. The equipment and foundation are subjected to a large impact load, and even cause damage to the converter main equipment, torsion bar, anchor bolts, and foundation cracking and damage. It is very necessary to research and develop a reliable vibration reduction device to effectively restrain the vibration of the converter equipment around the ear axis caused by the above-mentioned torsional vibration and avoid the harm caused. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a converter tilting reducer support device, which can absorb the energy of circumferential vibration around the ear axis during the converter production process, reduce the swing of the converter equipment around the ear axis caused by vibration, and reduce the impact between equipment parts and the impact of equipment on the foundation.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a converter tilting reducer support device, installed at the lower part of the secondary reducer of the converter tilting device, including a support, an adjustment gasket, a spring buffer and a top plate. Each converter is provided with at least two sets of support devices for use in combination, and each two sets of support devices are arranged symmetrically relative to the center line of the tilting device.

[0006] Optionally, the support is fixed to the converter foundation by embedded or pre-buried anchor bolts; the top of the support is connected to the bottom of the spring buffer by bolts, and an adjustment gasket is installed between the two; the upper part of the spring buffer is in contact with the top plate but not fixedly connected; the top plate is welded to the lower part of the casing of the secondary reducer of the tilting device.

[0007] Optionally, the tilting reducer support device is installed after the installation and adjustment of the converter tilting device and the torsion bar are completed. The number of support devices set for each converter is even and is arranged symmetrically on both sides of the center line a of the tilting device.

[0008] Optionally, the tilting reducer support device is arranged on the inner side of the connecting rod, or the support device is arranged on the outer side of the connecting rod.

[0009] Optionally, during installation, the same magnitude of preload force is applied to the springs of the spring buffers of the support devices on both sides of the center line a, thereby generating a set of balanced force couples relative to the center of the converter trunnion.

[0010] Optionally, the size of the balancing couple is calculated by measuring the compression of the spring buffer spring and the distance of the spring buffer relative to the center line a. The initial adjustment generally makes the couple size equal to 1 / 10 of the maximum working torque designed for the converter.

[0011] Optionally, the support device is used for vibration reduction modification of an existing converter, or for a new construction project; during the use of the converter, the preload of the spring buffer spring is adjusted by adjusting the gasket according to actual conditions to obtain the best vibration reduction effect.

[0012] The beneficial effects of the present invention are:

[0013] 1) The converter tilting reducer support device of the present invention can reduce the vibration impact caused by the equipment gap during the converter production process, absorb the vibration energy, reduce the swing amplitude of the converter equipment around the ear shaft caused by the vibration, and reduce the impact between the equipment parts and the equipment on the foundation; especially for the side-blown AOD converter and the large-flow bottom-blown converter where the equipment vibration is more severe during the smelting process, the vibration reduction effect is more obvious;

[0014] 2) The present invention provides a converter tilting reducer support device, which is easy to install and can be applied to the vibration-resistant transformation of existing converters as well as to newly built converters. The installation can be completed on site by installing the support of the support device under the converter tilting secondary reducer using embedded or pre-embedded anchor bolts, and then applying a certain pre-tightening force to the buffer. During the use of the converter, the pre-tightening force of the buffer can be adjusted according to actual conditions to obtain the best vibration reduction effect.

[0015] 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

[0016] 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:

[0017] Figure 1 It is a front view of the present invention;

[0018] Figure 2 It is a schematic diagram of the installation of the spring shock absorber of the present invention.

[0019] Figure numerals: Item 1 is a primary reducer, Item 2 is a secondary reducer, Item 3 is an ear shaft, Item 4 is a connecting rod, Item 5 is a torsion bar, Item 6 is a bolt, Item 7 is a support, Item 8 is an adjustment gasket, Item 9 is a spring buffer, and Item 10 is a top plate. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] See also Figure 1-2 Several primary reducers 1 are installed on the secondary reducer (the attached figure of the present invention shows four primary reducers), and the whole is fully suspended on the support ring ear shaft 3. The lower torsion bar 5 device is connected to the housing of the secondary reducer 2 through a connecting rod 4 mechanism, which is used to balance the reaction torque and impact force during the tilting process of the converter.

[0024] The present invention relates to a converter tilting reducer support device, which is composed of a support 7, an adjustment gasket 8, a spring buffer 9, and a top plate 10, and is installed at the lower part of the secondary reducer 2 of the converter tilting device. Each converter is generally equipped with two sets of support devices, one at the center line of the tilting device (attached Figure 1 The supporting device can be arranged symmetrically on both sides of the center line a) in the figure. The supporting device can be arranged on the inner side of the connecting rod 4 according to the position shown in the figure (position A), or the supporting device can be arranged on the outer side of the connecting rod 4 as shown in the figure B, as well as at a position symmetrical to the center line a.

[0025] During installation, the same preload force is applied to the spring buffer 9 of the support device on both sides of the center line a, thereby generating a set of balanced force couples relative to the center of the converter trunnion. The magnitude of the force couple can be calculated by measuring the compression of the spring buffer 9 and the distance of the spring buffer 9 relative to the center line a. The initial adjustment generally makes the force couple equal to 1 / 10 of the maximum working torque of the converter design. Due to the damping effect of the spring buffer 9, the vibration amplitude and vibration impact can be reduced when the tilting device is working.

[0026] The support device of the present invention is easy to install. The support 7 is installed on site by embedding or pre-embedded anchor bolts 6, and then the spring buffer 9 and the top plate 10 are installed between the support 7 and the secondary reducer 2 of the tilting device, and then the top plate 10 is welded to the secondary reducer 2, and finally the gasket 8 is adjusted to apply appropriate preload. It can be used for vibration reduction modification of existing converters and can also be used for new construction projects. During the use of the converter, the preload of the spring buffer 9 can also be adjusted by adjusting the gasket 8 according to actual conditions, and finally the best vibration reduction effect is obtained.

[0027] In this embodiment, each converter can be provided with 2 groups of tilting reducer support devices. According to different actual applications, in order to achieve better vibration reduction effect, 4 groups, 6 groups, 8 groups... and other even numbers of support devices can also be provided, and they can be arranged symmetrically in pairs relative to the center line a of the tilting device.

[0028] 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 converter tilting reducer support device, installed at the lower part of the secondary reducer of the converter tilting device, characterized in that: It includes a support, an adjusting gasket, a spring buffer and a top plate. Each converter is provided with at least two sets of supporting devices for matching use, and each two sets of supporting devices are arranged symmetrically relative to the center line of the tilting device.

2. A converter tilting reducer support device according to claim 1, characterized in that: The support is fixed to the converter foundation by embedded or pre-buried anchor bolts; the top of the support is connected to the lower part of the spring buffer by bolts, and an adjustment gasket is installed between the two; the upper part of the spring buffer is in contact with the top plate but not fixedly connected; the top plate is welded to the lower part of the casing of the secondary reducer of the tilting device.

3. The supporting device for a converter tilting reducer according to claim 1, characterized in that: The tilting reducer support device is installed after the installation and adjustment of the converter tilting device and torsion bar are completed. The number of support devices set for each converter is even and they are arranged symmetrically on both sides of the center line a of the tilting device.

4. A converter tilting reducer support device according to claim 3, characterized in that: The tilting reducer support device is arranged on the inner side of the connecting rod, or the support device is arranged on the outer side of the connecting rod.

5. The supporting device for a converter tilting reducer according to claim 1, characterized in that: During installation, the same preload force is applied to the springs of the spring buffers of the supporting devices on both sides of the center line a, thereby generating a set of balanced force couples relative to the center of the converter trunnion.

6. A converter tilting reducer support device according to claim 5, characterized in that: The size of the balancing couple is calculated by measuring the compression of the spring buffer and the distance of the spring buffer relative to the center line a. The initial adjustment generally makes the couple size equal to 1 / 10 of the maximum working torque designed for the converter.

7. The converter tilting reducer support device according to claim 1, characterized in that: The support device is used for vibration reduction modification of existing converters or for new construction projects; During the use of the converter, the preload force of the spring buffer spring is adjusted by adjusting the gasket according to the actual situation to obtain the best vibration reduction effect.

Images