Vibration reduction method for converter equipment

Abstract

The invention relates to a vibration reduction method for converter equipment. The vibration reduction method is used for effectively reducing equipment damage and potential safety hazards caused by vibration in the operation process of a converter. The method comprises the following steps: arranging a bearing seat supporting device on one side of a bearing seat on the floating side of the converter, and reducing vibration in the direction of a trunnion through the damping effect of a buffer; a tilting supporting device is arranged below the tilting device, so that torsional vibration in the trunnion direction is reduced; a gear self-locking function is added in an automatic control system of the tilting device, and gear clearance vibration is reduced through pre-tightening locking; and a mechanical locking device is arranged on the side of the secondary speed reducer, so that the converter is prevented from shaking in a stopped state. In addition, damping of the buffers can be adjusted by adjusting pull rods or gaskets, the supporting devices are symmetrically arranged on the two sides of the trunnions, and balanced supporting is achieved. The tilting device is suitable for a side-blown AOD converter and a large-flow bottom-blown converter, the amplitude of two kinds of vibration of the converter in the trunnion direction and around the trunnion axis in the smelting process can be reduced, and tilting device gear abrasion caused by vibration is relieved; therefore, the operation stability of the converter is improved, the safety of equipment and a foundation is improved, and the service lives of the converter equipment and ancillary facilities thereof are prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of converter equipment and relates to a vibration reduction method for converter equipment. Background Art

[0002] 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 iron pool from the top through the top gun; the AOD converter for smelting stainless steel generally adopts the side blowing method in which oxygen is sprayed into the furnace through 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 above process of spraying oxygen into the converter molten pool, the kinetic energy of the gas itself, as well as the work done by its expansion after being 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 blowing in process gases such as oxygen is difficult to completely avoid in various current converter smelting methods. It is more obvious in the above-mentioned smelting process in which oxygen is sprayed in from the side and bottom. When the gas excitation and solution oscillation frequency are close to the equipment's natural frequency, 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] Studies have shown that the vibration of the converter equipment caused by gas and molten steel excitation is mainly in the form of horizontal vibration along the axis of the ear shaft and vibration (torsional vibration) around the circumference of the ear shaft. Due to the needs of equipment manufacturing and installation, there must be a certain gap between the converter ear shaft bearing and the bearing seat, the tilting device housing and the torsion bar and other equipment parts. The existence of these gaps will cause collisions and impacts between the various parts when the converter is excited to vibrate, thereby causing damage to the equipment and foundation. There is also a certain tooth gap between the gear teeth of the converter tilting device. When there is vibration, the gear teeth in the meshing position will swing back and forth within the tooth gap range, which will cause rapid wear of the gear teeth and greatly reduce the life of the gears.

[0004] At present, there is no means to systematically and effectively restrain the various forms of shaking and impact of the converter caused by the above vibration, and it is impossible to effectively reduce the accelerated wear of equipment parts, especially the gears of the tilting device, caused by vibration. Therefore, it is very necessary to systematically study the converter vibration reduction method to reduce the various hazards caused by vibration. Summary of the invention

[0005] In view of this, the purpose of the present invention is to solve the above problems and provide a method for reducing vibration of converter equipment. The method proposes to respectively set a support device on one side of the bearing seat on the floating side of the converter and under the tilting device of the converter, and to add a "self-locking" control of the reducer gear in the tilting device or set a mechanical gear locking device to reduce the impact between equipment parts and the impact of the equipment on the foundation, and to reduce the wear of the reducer gear caused by vibration during the converter smelting process.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for reducing vibration of converter equipment, comprising: arranging a bearing seat support device on one side of a bearing seat on a floating side of the converter, and tiltingly supporting the side surface of the bearing seat on the floating side through the bearing seat support device; the bearing seat support device comprises a buffer, an adjusting rod, and a support; one end of the adjusting rod is fixed to a converter foundation through the support, and the other end is connected to the buffer, and the buffer is connected to the bearing seat on the floating side; when there is vibration along the ear axis direction during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer.

[0008] Furthermore, a tilting support device is arranged below the tilting device of the converter, and the tilting support device includes a buffer and a support; the buffer is fixed to the converter foundation through the support, and is vertically arranged below the tilting device to support the tilting device; when torsional vibration occurs around the ear axis during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer of the tilting support device.

[0009] Furthermore, a "self-locking" function of the reducer gear is added to the automatic control system of the tilting device. The "self-locking" function of the reducer gear is realized through an automatic control program. Each time the converter stops rotating, the brake engages, and after the furnace body stops steadily, the brake is opened for a short time, and the primary reducers on both sides of the furnace are operated to run briefly in opposite directions, and then the brakes are immediately operated to engage, so as to ensure that the large gear teeth of the tilting secondary reducer are in contact with the gear tooth surfaces of the primary reducers on both sides in the two directions of the furnace, and a certain preload force is applied, thereby reducing the gear friction and impact caused by vibration and avoiding accelerated wear.

[0010] Further, a mechanical locking device is arranged on one side of the secondary reducer of the tilting device, and the mechanical locking device comprises a base, a driving mechanism, and a locking rack; the base is mounted on the secondary reducer, the locking rack is mounted on one side of the large gear of the secondary reducer, and is connected to the base through a driving mechanism, and the driving mechanism is used to drive the locking rack to engage or disengage with the large gear of the secondary reducer; there is no tooth gap when the locking rack is engaged with the large gear of the secondary reducer; when the converter rotates, the locking rack is disengaged from the large gear of the secondary reducer through the driving mechanism, and when the converter stops rotating, the locking rack is pushed to engage with the large gear of the secondary reducer through the driving mechanism to lock the large gear of the secondary reducer;

[0011] The engagement and disengagement of the mechanical locking device participate in the control interlocking of the converter tilting device. When the tilting device is started, the mechanical locking device is in the open state to avoid affecting the normal driving of the converter.

[0012] Furthermore, the damping size is adjusted by adjusting the pull rod in the bearing seat support device, and the damping size is adjusted by adding or removing gaskets between the buffer and the support in the tilting support device, thereby obtaining the best vibration reduction effect.

[0013] Furthermore, there are an even number of bearing seat support devices, which are symmetrically arranged on both sides of the converter ear shaft; the angle between the bearing seat support device and the floating side bearing seat is θ, 20°≤θ≤50°.

[0014] Furthermore, there are an even number of the tilting support devices, which are symmetrically arranged on both sides of the converter ear axis.

[0015] Furthermore, the buffers in the bearing seat support device and the tilting support device are spring buffers, hydraulic buffers, rubber buffers, polyurethane buffers or cylinder buffers.

[0016] Furthermore, the driving mechanism is driven by a pneumatic cylinder, a hydraulic cylinder, an electro-hydraulic push rod or a motor reducer, and is correspondingly configured with an air source and an air control system, a hydraulic station and a hydraulic control system, a power supply and an electronic control system; the locking rack is configured with a working position detection element, and the signal of its engagement or disengagement with the large gear of the secondary reducer is fed back to the control system to realize electrical interlocking.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention studies and analyzes the main vibration forms of the converter when it vibrates under the stimulation of the gas and molten steel in the furnace, and proposes corresponding vibration reduction methods for different vibration forms. It is also proposed that by imposing constraints on the gears of the tilting reducer, the gear wear caused by vibration can be greatly reduced. The various vibration reduction measures of the present invention can absorb the two vibration energies of the converter along the ear axis and around the ear axis during the smelting process during the operation of the converter, reduce the shaking of the equipment caused by vibration, reduce the impact between equipment parts and the impact of the equipment on the foundation, and slow down gear wear. In particular, for side-blown AOD converters and large-flow bottom-blown converters where the equipment vibration is more severe during the smelting process, the effects are more obvious.

[0019] 2. The vibration reduction measures proposed by the present invention are easy to implement on site. On site, it is only necessary to install the supports of each supporting device at the corresponding position by welding or using embedded anchor bolts. The damping size of the buffer can also be adjusted in real time to obtain the best vibration reduction effect. The vibration reduction method of the present invention can be applied to the vibration-resistant transformation of existing converters and can also be applied to newly built converters.

[0020] 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

[0021] 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:

[0022] Figure 1 This is a front view of the implementation of the vibration reduction method for converter equipment in the present invention.

[0023] Figure 2 for Figure 1 Left view of .

[0024] Figure 3 for Figure 1 Right view of .

[0025] Figure numerals: 1. bearing seat support device; 1-1. buffer; 1-2. adjusting rod; 1-3. support; 2. converter tilting support device; 2-1. buffer; 2-2. support; 3. mechanical locking device; 3-1. base; 3-2. driving mechanism; 3-3. locking rack; 4. tilting device; 4-1. primary reducer; 4-2. secondary reducer; 5. fixed side bearing seat; 6. floating side bearing seat; 7. converter foundation. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figures 1 to 3 , which is a vibration reduction method for converter equipment, including the following three vibration reduction measures:

[0030] 1. A bearing seat support device 1 is arranged on one side of the bearing seat 6 on the floating side of the converter, and the side of the bearing seat 6 on the floating side is tilted and supported by the bearing seat support device 1; the bearing seat support device 1 comprises a buffer 1-1, an adjusting rod 1-2, and a support 1-3; one end of the adjusting rod 1-2 is fixed to the converter foundation 7 through the support 1-3, and the other end is connected to the buffer 1-1, and the buffer 1-1 is connected to the side of the bearing seat 6 on the floating side; when there is vibration along the ear axis direction during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer 1-1.

[0031] 2. A tilting support device 2 is provided below the tilting device of the bearing seat 5 on the fixed side of the converter; the tilting support device 2 comprises a buffer 2-1 and a support 2-2; the buffer 2-1 is fixed to the converter foundation 7 through the support 2-2, and is vertically arranged below the tilting device to support the tilting device; when torsional vibration occurs around the axis of the ear shaft during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer 2-1 of the tilting support device 2.

[0032] 3. Add the "self-locking" function of the reducer gear in the automatic control system of the tilting device. The "self-locking" function of the reducer gear is realized through the automatic control program. Each time the converter stops rotating, the brake is engaged, and after the furnace body stops, the brake is opened for a short time, and the primary reducers 4-1 on both sides of the furnace are operated to run in opposite directions for a short time, and then the brake is immediately operated to engage, so as to ensure that the large gear teeth of the tilting secondary reducer 4-2 are in contact with the gear tooth surfaces of the primary reducers 4-1 on both sides in the two directions of the furnace, and a certain preload force is applied, thereby reducing the friction and impact of the gears caused by vibration and avoiding accelerated wear. Alternatively, a mechanical locking device 3 is set on one side of the secondary reducer 4-2 of the tilting device. In this embodiment, the mechanical locking device is used as an example.

[0033] The mechanical locking device 3 includes a base 3-1, a driving mechanism 3-2, and a locking rack 3-3, which is arranged on the upper part of the secondary reducer 4-2 of the tilting device, and can also be Figure 2 Points A, B, and C are arranged, and the above four points can be arranged separately or in combination of 2, 3, or 4 points as needed to achieve an ideal gear locking effect. Among them, the base 3-1 is installed on the secondary reducer 4-2, and the locking rack 3-3 is installed on the side of the large gear of the secondary reducer 4-2, and is connected to the base 3-1 through the driving mechanism 3-2. The driving mechanism 3-2 is used to drive the locking rack 3-3 to engage or disengage with the large gear of the secondary reducer 4-2; there is no tooth gap when the locking rack 3-3 is engaged with the large gear of the secondary reducer 4-2; when the converter rotates, the locking rack 3-3 is disengaged from the large gear of the secondary reducer 4-2 through the driving mechanism 3-2. When the converter stops rotating, the locking rack 3-3 is pushed to engage with the large gear of the secondary reducer 4-2 through the driving mechanism 3-2 to lock the large gear of the secondary reducer; the engagement and disengagement of the mechanical locking device participate in the control interlocking of the converter tilting device. When the tilting device is started, the mechanical locking device is in an open state to avoid affecting the normal drive of the converter.

[0034] These three measures can be implemented separately or in combination, and can absorb vibration energy during converter operation, reduce equipment shaking caused by vibration, reduce the impact between equipment parts and equipment on the foundation, and slow down gear wear. Especially for side-blown AOD converters and large-flow bottom-blown converters where equipment vibration is more severe during smelting, the vibration reduction effects are more obvious.

[0035] In this implementation, the combination of three measures is taken as an example, wherein there are an even number of tilting support devices 2, which are symmetrically arranged on both sides of the converter trunnion. There are an even number of bearing seat support devices 1, which are symmetrically arranged on both sides of the converter trunnion; in actual applications, 2 groups can be set respectively, or 4 groups, 6 groups, 8 groups... and other even numbers can be set. The bearing seat support device and the floating side bearing seat form a certain angle θ, and the value of θ can be 0<θ<180°. In theory, the closer θ is to or equal to 90°, the more obvious the vibration reduction effect. Considering the limitations of the actual installation conditions of general converter equipment on site, the recommended value of θ is 20°≤θ≤50°, and the specific value should be comprehensively analyzed according to the size of the axial force of the converter bearing seat and the actual installation space of the converter foundation. In the bearing seat support device, the damping size is adjusted by adjusting the pull rod, and in the tilting support device, the damping size is adjusted by adding or removing gaskets between the buffer and the support, so as to obtain the best vibration reduction effect. The buffer 1-1 and the buffer 2-1 in the bearing seat support device and the tilting support device are spring buffers, hydraulic buffers, rubber buffers, polyurethane buffers or cylinder buffers.

[0036] The driving mechanism 3-2 is driven by a cylinder, hydraulic cylinder, electro-hydraulic push rod or motor reducer, and is configured with a gas source and gas control system, a hydraulic station and a hydraulic control system, a power supply and an electronic control system; the locking rack 3-3 is configured with a working position detection element, and the signal of its engagement or disengagement with the large gear of the secondary reducer is fed back to the control system to achieve electrical interlocking. When the tilting device is started, the mechanical locking device must be in the open state to avoid affecting the normal drive of the converter.

[0037] 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 method for reducing vibration of converter equipment, characterized in that: A bearing seat support device is arranged on one side of the bearing seat on the floating side of the converter, and the side surface of the bearing seat on the floating side is tilted and supported by the bearing seat support device; the bearing seat support device comprises a buffer, an adjusting rod and a support; one end of the adjusting rod is fixed to the converter foundation through the support, and the other end is connected to the buffer, and the buffer is connected to the bearing seat on the floating side; when there is vibration along the ear axis direction during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer.

2. The converter equipment vibration reduction method according to claim 1, characterized in that: A tilting support device is arranged below the converter tilting device, and the tilting support device includes a buffer and a support; The buffer is fixed to the converter foundation through a support and is arranged vertically below the tilting device to support the tilting device. When torsional vibration occurs around the ear axis during the operation of the converter, the vibration amplitude is reduced and the vibration impact is alleviated under the damping action of the buffer of the tilting support device.

3. The vibration reduction method for converter equipment according to claim 1, characterized in that: A "self-locking" function of the reducer gear is added to the automatic control system of the tilting device. The "self-locking" function of the reducer gear is realized through the automatic control program. Each time the converter stops rotating, the brake is engaged. After the furnace body stops steadily, the brake is opened for a short time, and the primary reducers on both sides of the furnace are operated to run briefly in opposite directions respectively, and then the brake is immediately operated to engage to ensure that the large gear teeth of the tilting secondary reducer are in contact with the gear tooth surfaces of the primary reducers on both sides in the two directions of the furnace, and a certain preload force is applied, thereby reducing the gear friction and impact caused by vibration and avoiding accelerated wear.

4. The vibration reduction method for converter equipment according to claim 1, characterized in that: A mechanical locking device is arranged on one side of the secondary reducer of the tilting device, and the mechanical locking device includes a base, a driving mechanism, and a locking rack; the base is installed on the secondary reducer, the locking rack is installed on one side of the large gear of the secondary reducer, and is connected to the base through a driving mechanism, and the driving mechanism is used to drive the locking rack to engage or disengage with the large gear of the secondary reducer; there is no tooth gap when the locking rack is engaged with the large gear of the secondary reducer; when the converter rotates, the locking rack is disengaged from the large gear of the secondary reducer through the driving mechanism, and when the converter stops rotating, the locking rack is pushed to engage with the large gear of the secondary reducer through the driving mechanism to lock the large gear of the secondary reducer; The engagement and disengagement of the mechanical locking device participate in the control interlocking of the converter tilting device. When the tilting device is started, the mechanical locking device is in the open state to avoid affecting the normal driving of the converter.

5. The converter equipment vibration reduction method according to claim 2, characterized in that: The damping size is adjusted by adjusting the pull rod in the bearing seat support device, and the damping size is adjusted by adding or removing gaskets between the buffer and the support in the tilting support device, so as to obtain the best vibration reduction effect.

6. The converter equipment vibration reduction method according to claim 1, characterized in that: There are an even number of bearing seat support devices, which are symmetrically arranged on both sides of the converter trunnion; the angle between the bearing seat support device and the floating side bearing seat is θ, 20°≤θ≤50°.

7. The converter equipment vibration reduction method according to claim 2, characterized in that: There are an even number of tilting support devices, which are symmetrically arranged on both sides of the converter trunnion.

8. The converter equipment vibration reduction method according to claim 2, characterized in that: The buffers in the bearing seat support device and the tilting support device are spring buffers, hydraulic buffers, rubber buffers, polyurethane buffers or cylinder buffers.

9. The converter equipment vibration reduction method according to claim 4, characterized in that: The driving mechanism is driven by an air cylinder, a hydraulic cylinder, an electro-hydraulic push rod or a motor reducer, and is correspondingly configured with an air source and an air control system, a hydraulic station and a hydraulic control system, a power supply and an electronic control system; the locking rack is configured with a working position detection element, and the signal of its engagement or disengagement with the large gear of the secondary reducer is fed back to the control system to realize electrical interlocking.

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