Elastic self-adaptive connection structure of converter tilting device and backing ring

Abstract

The invention relates to an elastic self-adaptive connection structure of a converter tilting device and a backing ring, which comprises a bull gear hub and a backing ring trunnion, the bull gear hub is sleeved on the backing ring trunnion and is in transmission connection with the backing ring trunnion, and the bull gear hub and the backing ring trunnion are in clearance fit when the bull gear hub and the backing ring trunnion are sleeved; clamping devices are arranged on the two sides of the large gear hub. The clamping device comprises a hoop, a clamping ring, a bolt and a nut assembly; the hoop is in a semi-closed circular ring shape and is arranged on a large gear hub in a sleeving mode. The clamping ring is in a closed circular ring shape and is arranged on the hoop in a sleeving mode. The outer wall of the clamping hoop and the inner wall of the clamping ring are conical and are in wedge-shaped fit through conical surface attachment; the nut assembly is connected to the bolt through threads, the clamping ring moves in the axial direction by screwing the nut assembly, so that the hoop shrinks in the radial direction through conical surface extrusion, under the radial extrusion force, the large gear hub and the trunnion ring trunnion are tightly held, friction force is generated on the contact face of the trunnion ring trunnion and the large gear hub, and therefore the large gear hub and the trunnion ring trunnion are clamped. And torque transmission between the tilting device and the backing ring is realized. The problems that a traditional converter tilting gear and a trunnion are connected and assembled in a long time, the disassembling difficulty is large, and the trunnion is prone to being damaged can be solved, and the converter tilting gear and trunnion connecting device has the advantages of being large in transmission torque, stable in machining and manufacturing quality, high in use reliability and easy and rapid to assemble and disassemble.

Description

Technical Field

[0001] The invention belongs to the technical field of converter steelmaking equipment and relates to an elastic self-adaptive connection structure of a converter tilting device and a support ring. Background Art

[0002] The tilting device is one of the key equipment for converter steelmaking, which transmits torque when the converter is tilted. Depending on the tonnage of the converter, the torque required for tilting large and medium-sized converters is 4000~10000kNm. At present, the widely used four-point full-suspension tilting device has an output gear that is gap-fitted on the support ring ear shaft and adopts a connection method of a cylindrical double tangential key group, that is, firstly, a special-shaped groove is machined on the outer cylindrical surface of the support ring ear shaft and the inner cylindrical hole of the gear hub, and the output gear is fitted on the support ring ear shaft during on-site assembly, and the two sets of processed tangential key groups with grinding allowance are installed in the keyway hole formed by the set gear and the ear shaft. This connection structure will cause the following problems:

[0003] a. In order to ensure the contact rate between the tangential key and the working bearing surface of the large gear hub and the tangential keyway of the trunnion, the tangential key must be repeatedly and carefully ground, which takes about 5 to 7 days;

[0004] b. Because double keyways are cut on the trunnion and the large gear hub, the strength of the trunnion and the large gear hub is weakened to varying degrees. In order to ensure the safe and reliable operation of the equipment, the structure (diameter) is increased, making the equipment heavier;

[0005] c. After the equipment has been in production and operation for a period of time, if the tilting gear has defects that are difficult to repair and needs to be replaced, the bearing surface of the tangential key is tightly bonded to the ear shaft and the gear hub and is difficult to remove. Therefore, the gear needs to be destructively removed, which is not only difficult and time-consuming, but also easy to damage the ear shaft.

[0006] In recent years, a hydraulic keyless conical interference connection form has appeared (Chinese patent publication number CN115978164A, see attached Figure 5 ), an intermediate sleeve is set between the output large gear hub and the support ring ear shaft. The outer surface of the intermediate sleeve is conical and the inner surface is cylindrical. The intermediate sleeve and the large gear hub are connected by a conical interference fit to transmit torque. The mating surface between the intermediate sleeve and the output large gear is a 1:50 conical surface. There is a hydraulic oil groove in the large gear hub. During installation, hydraulic oil must be injected through a special ultra-high pressure hydraulic system (350MPa) to form a high-pressure (130MPa) oil film between the hub and the ear shaft. The special output large gear hydraulic installation device pushes the hub to the specified position and then releases the pressure, so that an interference fit is formed between the large gear hub and the intermediate sleeve, and between the intermediate sleeve and the ear shaft. Problems with this ultra-high pressure hydraulic tapered shaft and tapered hole interference fit:

[0007] a. The machining accuracy requirements for the intermediate sleeve and the output gear hub taper mating surface are extremely high, and both require ultra-large high-precision machine tools to process, which increases the manufacturing difficulty and cost of the equipment;

[0008] b. During disassembly, in order to ensure that the hydraulic oil penetrates into the joint surface between the output gear hub and the intermediate sleeve in order to loosen the connecting cone surface, the oil pressure is as high as 300MPa, requiring special ultra-high pressure hydraulic tools, which increases the difficulty and cost of disassembly and assembly;

[0009] c. Although this connection structure does not have the weakening of the keyway, the stress concentration at the edge of the mating surface is relatively large (plastic deformation).

[0010] d. Since the intermediate sleeve and the output gear hub adopt a 1:50 cone surface, the dimensional tolerance and angular tolerance of the cone surface have a great influence on the axial positioning of the gear, which will affect the installation of other components on the tilting side of the support ring and the position of the anchor bolts of the torsion bar of the tilting device.

[0011] In view of the above reasons, the keyless cone interference connection was initially used in imported equipment (SMSDEMAG's AOD converter), and domestic imitations were rarely used in other converters, and there is still no connection method to replace the double tangential key group.

[0012] Based on this, it is necessary to develop a new elastic adaptive connection structure between the converter tilting output gear and the support ring ear shaft to solve the significant deficiencies of the traditional double tangential key group connection structure in strength, manufacturing, installation, use and cost, as well as the ultra-high hydraulic tapered shaft and tapered hole interference connection with high requirements on matching dimensional accuracy, complex non-standard manufacturing process, difficult to ensure quality, long assembly time and difficult disassembly. Summary of the invention

[0013] In view of this, the purpose of the present invention is to overcome the shortcomings of the existing cylindrical double tangential key set and ultra-high hydraulic keyless cone connection technology, and to provide an elastic adaptive connection structure between a converter tilting device and a support ring.

[0014] In order to achieve the above object, the present invention provides the following technical solutions:

[0015] An elastic adaptive connection structure between a converter tilting device and a support ring, comprising a large gear hub and a support ring trunnion, wherein the large gear hub is sleeved on the support ring trunnion and is in transmission connection; a clearance fit is adopted between the large gear hub and the support ring trunnion when the large gear hub is sleeved; clamping devices are arranged on both sides of the large gear hub; the clamping devices include a clamp, a clamping ring, a bolt and a nut assembly;

[0016] The clamp is in the shape of a semi-closed circular ring and is mounted on the large gear hub; the clamping ring is in the shape of a closed circular ring and is mounted on the clamp; the outer wall of the clamp and the inner wall of the clamping ring are both conical, and a wedge fit is formed by fitting the conical surface; the bolts are arranged along the axial direction of the clamping ring, and a plurality of bolts are evenly distributed on the circumference of the clamping ring; the nut assembly is connected to the bolts by threading, and the clamping ring is moved axially by screwing the nut assembly, so that the clamp is contracted radially by extrusion of the conical surface, and the large gear hub and the support ring ear shaft are tightly held under the radial extrusion force, and friction is generated on the contact surface between the support ring ear shaft and the large gear hub, so as to realize the torque transmission between the tilting device and the support ring. An elastic interference connection is formed between the large gear hub and the support ring ear shaft under the action of the clamping device, and after the action of the clamping device is cancelled, the clearance fit between the large gear hub and the support ring ear shaft is restored, which is convenient for disassembly and assembly.

[0017] Preferably, a conical surface is provided on the outer wall of the clamp, and the end face of the clamp is provided with through holes and disassembly threaded holes evenly distributed around the circumference, and the end face of the clamping ring is provided with bolt holes corresponding to the through holes on the end face of the clamp, and the bolts pass through the through holes on the end face of the clamp and the bolt holes on the clamping ring, and are threadedly connected to the nut assembly to tighten the clamp and the clamping ring.

[0018] Preferably, the outer wall of the clamp is provided with two conical surfaces in opposite directions, and the diameters of the adjacent ends of the two conical surfaces are larger than the diameters on both sides; a clamping ring is correspondingly provided on each conical surface, and an axial gap is provided between the two clamping rings; the two clamping rings are provided with bolt holes evenly distributed around the circumference, the bolts are arranged in the bolt holes and are threadedly connected to the nut assembly to tighten the clamp and the clamping ring; the end face of one of the clamping rings is also provided with disassembly threaded holes evenly distributed around the circumference.

[0019] Furthermore, the nut assembly includes a nut body, a hard pad and a push screw; the hard pad is mounted on the bolt and is located on the inner side of the nut body; the nut body is threadedly connected to the bolt; the push screw is threadedly connected to the nut body and abuts against the hard pad.

[0020] Furthermore, a pressing assembly is provided at the outer end of the support ring ear shaft; the pressing assembly includes a pressure cover, an ear shaft top screw and a wheel hub top screw; the pressure cover is provided with a plurality of threaded holes and through holes, and the support ring ear shaft and the end face of the large gear hub are provided with a plurality of threaded holes corresponding to the through holes on the pressure cover; when the large gear hub is installed, the bolts are connected to the support ring ear shaft through the through holes of the pressure cover; the ear shaft top screw and the wheel hub top screw are respectively arranged in the threaded holes of the pressure cover, and respectively correspond to the end face of the support ring ear shaft and the end face of the large gear hub; when the large gear hub is disassembled, the bolts connecting the pressure cover and the end face of the support ring ear shaft are removed, and the pressure cover is connected to the end face of the large gear hub; the pressure cover is separated from the support ring ear shaft by the ear shaft top screw, thereby driving the large gear hub to move.

[0021] Furthermore, an adjustable distance sleeve assembly is provided on the side of the large gear hub away from the pressure top assembly. The adjustable distance sleeve assembly is sleeved on the support ring ear shaft, and one end of the adjustable distance sleeve assembly is abutted against the shoulder of the support ring ear shaft, and the other end is abutted against the end face of the large gear hub to perform axial positioning of the large gear hub.

[0022] Furthermore, the diameters of the outer circles on both sides of the large gear hub are the same, both are d4, and the tolerance fit of the d4 diameter section is f6; the inner hole of the large gear hub is divided into three sections of different sizes, and the diameter of the middle section d3> the diameter of the inner section d1> the diameter of the outer section d2, and the tolerance fits of the inner section d1 and the outer section d2 are both H7; annular oil grooves are provided on the inner circumferential surfaces of the inner section d1 and the outer section d2 of the inner hole of the large gear hub, and oil channels connected to the respective oil grooves are provided at both ends; the inner hole and the two end heads of the outer circle of the large gear hub are provided with an introduction guide angle α, and α≤10°.

[0023] Furthermore, the outer circle of the section where the ear shaft engages with the inner hole of the large gear hub is divided into two sections of different sizes, namely the inner section d5 and the outer section d6, the tolerance fit of the two sections is g6, and the ends of the inner section d5 and the outer section d6 are both provided with an introduction guide angle β; the inner section d5 of the ear shaft cooperates with the inner section d1 of the inner hole of the large gear hub, and the outer section d6 of the ear shaft cooperates with the outer section d2 of the large gear hub hole, and an oil groove is opened on the surface of the two engaging sections along the axial direction.

[0024] Furthermore, the conical surfaces of the clamp and the clamping ring have the same taper, and the taper is 2.0 to 3.5°.

[0025] Furthermore, the clamping device also includes a protective cover, and the clamp and the clamping ring cover are arranged in the protective cover.

[0026] The beneficial effects of the present invention are:

[0027] 1. In the present invention, the large gear hub and the support ring trunnion, the clamp and the large gear hub are all clearance sets. After the bolts of the clamping device are tightened, the contact surfaces between the clamping ring and the clamp, the clamp and the large gear hub, and the large gear hub and the support ring trunnion are elastic interference connections. After the external force causing deformation is removed by loosening the bolts, each connecting part can basically return to its original state, and it is easy to assemble and disassemble, thereby realizing the rapid assembly and disassembly of the connection between the tilting device and the support ring trunnion;

[0028] 2. In the present invention, the support ring ear shaft and the large gear hub do not need to be processed with special-shaped holes and grooves, which reduces the difficulty level of machine processing and reduces the processing time; the ear shaft and the large gear hub are key load-bearing parts of the equipment, and have no special-shaped keyways that weaken the load-bearing capacity, thereby improving the load-bearing capacity of the equipment.

[0029] 3. In the present invention, the large gear hub hole and the support ring ear shaft are assembled with clearance, and no high-precision processing is required, which solves the problem that the matching surface of the large gear hub hole and the support ring ear shaft of the tilting device output needs an ultra-large high-precision machine tool to be processed, which is a significant improvement.

[0030] 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

[0031] 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:

[0032] Figure 1 It is an overall schematic diagram of the elastic adaptive connection structure between the converter tilting device and the support ring in the present invention.

[0033] Figure 2 It is a cross-sectional view of the large gear hub and the support ring trunnion in the present invention.

[0034] Figure 3 It is a schematic diagram of the bidirectional short conical surface matching between the clamp and the clamping ring in the present invention.

[0035] Figure 4 It is a schematic diagram of the one-way long conical surface matching between the clamp and the clamping ring in the present invention.

[0036] Figure 5 It is a structural schematic diagram of the prior art.

[0037] Figure numerals: 1, support ring ear shaft; 1-1, oil groove; 2, large gear hub; 2-1, oil port; 2-2, oil channel; 2-3, oil groove; 3, clamping device; 3-1, clamp; 3-2, clamping ring; 3-3, bolt; 3-4, nut assembly; 3-4.1, nut body; 3-4.2, hard pad; 3-4.3, push screw; 4, top pressing assembly; 4-1, pressure cover; 4-2, bolt; 4-3, ear shaft top screw; 4-4, hub top screw; 5, protective cover; 6, adjustable distance sleeve assembly. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] See also Figures 1 to 4 It is an elastic adaptive connection structure between a converter tilting device and a support ring, comprising a large gear hub 2 and a support ring ear shaft 1, wherein the large gear hub 2 is sleeved on the support ring ear shaft 1 and is transmission-connected; a clearance fit is adopted when the large gear hub 2 and the support ring ear shaft 1 are sleeved; two clamping devices 3 are symmetrically installed on the outer cylindrical surfaces on both sides of the large gear hub 2.

[0042] The clamping device 3 includes a clamping hoop 3-1, a clamping ring 3-2, a bolt 3-3 and a nut assembly 3-4; the clamping hoop 3-1 is a semi-closed annular body with a straight annular seam, the outer surface matching the clamping ring 3-2 is conical with a taper of 3°, and the inner hole matching the outer circle d4 of the large gear hub 2 is cylindrical and has a tolerance fit of H7; the clamping ring 3-2 is a closed annular body with a conical inner hole surface and a cylindrical outer surface. The clamping ring 3-2 is sleeved on the clamping hoop 3-1, and the bolt 3-3 and the nut assembly 3-4 cooperate to make the clamping ring 3-2 axially move relative to the clamping hoop 3-1, so that the clamping hoop 3-1 is radially contracted by extrusion of the conical surface, and the large gear hub 2 and the support ring ear shaft 1 are tightly embraced under the radial extrusion force, and friction is generated on the contact surface between the support ring ear shaft 1 and the large gear hub 2, so as to realize the torque transmission between the tilting device and the support ring.

[0043] An elastic interference fit is formed between the large gear hub 2 and the support ring trunnion 1 under the action of the clamping device 3, and after the action of the clamping device 3 is cancelled, the large gear hub 2 and the support ring trunnion 1 are restored to a clearance fit.

[0044] The clamping device 3 in the present invention can be of two different structures, such as Figure 3 , 4 As shown:

[0045] Figure 3 The conical joint surface of the clamp 3-1 and the clamp ring 3-2 in the middle clamping device 3 is a short bidirectional conical surface. Two conical surfaces in opposite directions are arranged on the outer wall of the clamp 3-1, and the diameters of the adjacent ends of the two conical surfaces are larger than the diameters of the two sides; a clamp ring 3-2 is arranged on each conical surface, and an axial gap is arranged between the two clamp rings 3-2; bolt holes evenly distributed around the circumference are arranged on the two clamp rings 3-2, and the bolts 3-3 are installed in the bolt holes and threadedly connected with the nut assembly 3-4 to tighten the clamp 3-1 and the clamp ring 3-2, and 4 to 8 disassembly threaded holes evenly distributed around the circumference are also arranged on the end face of one of the clamp rings 3-2.

[0046] Figure 4 The conical joint surface between the clamp 3-1 and the clamping ring 3-2 in the clamping device 3 is a unidirectional long conical surface. A conical surface is arranged on the outer wall of the clamp 3-1. The outer end surface of the clamp 3-1 is provided with through holes evenly distributed around the circumference and 4 to 8 disassembly threaded holes. The end surface of the clamping ring 3-2 is provided with bolt holes corresponding to the through holes arranged on the outer end surface of the clamp 3-1. The bolts 3-3 are installed in the bolt holes and cooperate with the nut assembly 3-4 to tighten the two clamping rings.

[0047] The tolerance fit of the d4 diameter section matching the inner hole of the clamp 3-1 in the clamping device 3 at both ends of the large gear hub 2 is f6; for the convenience of assembly, disassembly and air release, the inner hole of the large gear hub 2 is processed into 3 sections of different sizes, and the middle section d3>inner section d1>outer section d2, and the tolerance fit of the inner section d1 and the outer section d2 are both H7; for the convenience of centering, the end of the inner section d1 and the inner end of the outer section d2 are processed with an introduction guide angle of α=10°; in order to make disassembly smoother, two rows of annular oil grooves 2-3 are opened on the inner circumferential surfaces of the inner section d1 and the outer section d2 of the inner hole of the large gear hub 2, and oil ports 2-1 and oil channels 2-2 connected to their respective oil grooves 2-3 are also opened on the two end surfaces.

[0048] The outer diameter of the section where the support ring ear shaft 1 engages with the inner hole of the large gear hub 2 is processed into two sections of different sizes, namely the inner section d5 and the outer section d6, and the tolerance fit of the two sections is g6; to facilitate the horizontal axial advancement of the large gear hub 2 during installation, the end of the inner section d5 and the end of the outer section d6 both have an introduction guide angle of β=5°; to make the disassembly of the large gear hub 2 smoother, four oil grooves 1-1 are axially opened on the outer surfaces of the sections where the inner section d5 and the outer section d6 engage with the inner section d1 and the outer section d2 of the inner hole of the large gear hub 2, and are evenly arranged.

[0049] In this embodiment, an adjustable distance sleeve assembly 6 is mounted on the support ring trunnion 1 for axial positioning of the inner end surface of the large gear hub 2. A pressing assembly 4 is installed at the end of the support ring trunnion 1 for assembly, disassembly and positioning of the large gear hub 2;

[0050] The outer end of the support ring ear shaft 1 is installed with a pressing assembly 4; the pressing assembly 4 includes a pressure cover 4-1, an ear shaft top screw 4-3, and a hub top screw 4-4; a plurality of threaded holes and through holes are provided on the pressure cover 4-1, and a plurality of threaded holes corresponding to the through holes on the pressure cover 4-1 are provided on the end faces of the support ring ear shaft 1 and the large gear hub 2; when the large gear hub 2 is installed, the bolt 4-2 passes through the through hole of the pressure cover 4-1 and is connected to the support ring ear shaft 1; the ear shaft top screw 4-3 and the hub top screw 4-4 are respectively installed in the threaded holes of the pressure cover 4-1, and respectively correspond to the end faces of the support ring ear shaft 1 and the large gear hub 2; when the large gear hub 2 is disassembled, the bolt 4-2 connecting the pressure cover 4-1 with the end face of the support ring ear shaft 1 is removed, and the pressure cover 4-1 is connected with the end face of the large gear hub 2; the pressure cover 4-1 is separated from the support ring ear shaft 1 by the ear shaft top screw 4-3, thereby driving the large gear hub 2 to move.

[0051] Among them, the nut assembly 3-4 includes a nut body 3-4.1, a hard pad 3-4.2 and a push screw 3-4.3; the nut body 3-4.1 is screwed together with the bolt 3-3, the hard pad 3-4.2 is placed between the clamping ring 3-2 and the nut body 3-4.1, and the push screw 3-4.3 is evenly surrounded by the nut body, and its threaded end passes through the inner threaded hole of the nut body 3-4.1 and abuts against the hard pad 3-4.2, and the end protrudes beyond the thickness of the nut body 3-4.1.

[0052] In this embodiment, the clamping device 3 further includes a protective cover 5, which is disposed on the box body where the large gear hub 2 is located, and is used to protect the clamp 3-1 and the clamping ring 3-2.

[0053] When the large gear hub 2 is sleeved on the designated position of the support ring ear shaft 1, a torque wrench is used to set the torque value MA, and the nut body 3-4.1 in the nut assembly 3-4 in the clamping device 3 is screwed and tightened one by one. Then the push screw 3-4.3 is screwed to make it tightly abut against the hard pad 3-4.2. The push screw 3-4.3 evenly transmits the pre-tightening force to the main thread of the bolt 3-3 and the nut body 3-4.1, so that the clamp 3-1 and the clamping ring 3-2 move axially along the large gear hub 2, so that a set elastic interference connection is formed between the contact surfaces of the clamping ring 3-2 and the clamp 3-1, the clamp 3-1 and the large gear hub 2, and the support ring hub 2 and the ear shaft 1, so that the radial contact pressure of the contact surface between the support ring ear shaft 1 and the large gear hub 2 generates friction, thereby realizing the torque transmission between the tilting device and the support ring.

[0054] by Figure 3 Taking the structure of as an example, the assembly and disassembly method of the tilting device and the support ring trunnion connection structure in this example includes the following steps:

[0055] Installation process:

[0056] S1. Before installation, clean the joint surfaces of the support ring trunnion 1, the large gear hub 2, the clamping device 3 and the adjustable spacer sleeve assembly 6 with an appropriate solvent to ensure that there is no dirt, corrosion and damage.

[0057] S2. Apply a thin layer of mineral lubricant, such as 46-68mm, evenly on the surfaces where the clamp 3-1 of the clamping device 3 and the clamping ring 3-2, the clamp 3-1 and the large gear hub 2, and the large gear hub 2 and the support ring ear shaft 1 are connected. 2 / s (at 40°C) of mineral oil.

[0058] S3. Sleeve the adjustable distance sleeve assembly 6 on the support ring ear shaft 1 to be used for axial positioning of the inner end surface of the large gear hub 2.

[0059] S4, put the clamping ring 3-2 in the inner clamping device 3 on the clamping hoop 3-1, screw the nut body 3-4.1 in the nut assembly 3-4 with the bolt 3-3, so that the clamping ring 3-2 and the clamping hoop 3-1 are loosely connected as one, and put them on the appropriate position of the outer cylindrical surface d4 section inside the large gear hub 2;

[0060] S5. Use lifting and pulling tools to align the center line of the inner hole of the large gear hub 2 with the axis of the support ring trunnion 1, and then use the pressure cover 4-1, bolts 4-2, and hub top screws 4-4 in the top pressing assembly 4 to translate the hub 2 along the axis of the support ring trunnion 1 to the designated position on the trunnion 1. To prevent the large gear hub 2 from being skewed or stuck, tighten the bolts 4-2 and the hub top screws 4-4 according to the principles of diagonal, cross, and uniform.

[0061] S6. Put the clamping ring 3-2 in the outer clamping device 3 on the clamping hoop 3-1, and screw the nut body 3-4.1 in the nut assembly 3-4 with the bolt 3-3 to make the clamping ring 3-2 and the clamping hoop 3-1 loosely connected as a whole, and put it on the appropriate position of the outer cylindrical surface d4 section of the large gear hub 2.

[0062] S7. Tighten the bolts 3-3 on the clamping devices 3 on both sides one by one according to the set torque MA value, so that the clamping ring 3-2 and the clamping hoop 3-1 move along the axial direction of the large gear hub 2, so that a set elastic interference connection is formed between the contact surfaces of the clamping ring 3-2 and the clamping hoop 3-1, the clamping hoop 3-1 and the large gear hub 2, and the large gear hub 2 and the supporting ring ear shaft 1. The radial contact pressure of the contact surface between the supporting ring ear shaft 1 and the large gear hub 2 generates friction force, thereby realizing the torque transmission between the tilting and the supporting ring.

[0063] Among them, the method of tightening the bolt 3-3 is: use a torque wrench, according to the set torque value MA, first screw and tighten the nut body 3-4.1 in the nut assembly 3-4 into place, then screw the push screw 3-4.3 to make it tightly abut against the hard pad 3-4.2, and the push screw evenly transfers the pre-tightening force to the main thread of the bolt 3-3 and the nut body 3-4.1, and the main thread is locked.

[0064] In this embodiment, the bolts and screws are tightened in an equilateral triangle order, first tightened to 1 / 4 of the rated torque MA value, then tightened with increasing torque value of 1 / 4MA, ​​and all screws are checked again with MA value.

[0065] S8, tighten the connecting bolts 4-2 on the pressure cover 4-1 in the pressure top assembly 4. After applying a layer of anti-rust grease to the exposed part and the screw head, install the protective cover 5.

[0066] Disassembly process:

[0067] S1. Before disassembly, remove the protective cover 5 and loosen the connecting bolts 4-2 in the top pressing assembly 4, and connect the pressure cover 4-1 to the end surface of the large gear hub 2 through bolts.

[0068] S2. Loosen all the bolts 3-3 in the two clamping devices 3 one by one. At this time, the contact pressure between the clamping ring 3-2 and the clamp 3-1, the clamp 3-1 and the large gear hub 2, and the large gear hub 2 and the support ring ear shaft 1 is released. After the external force causing the deformation of the elastic interference connection is removed, each connecting part can basically return to its original state.

[0069] The method for loosening the bolts 3-3 is to loosen them one by one in an equilateral triangle sequence, and loosen them by 1 / 4 turn in each cycle. If the clamping ring 3-2 cannot be loosened, screw the push screw 3-4.3 into the disassembly threaded hole on the clamp 3-1 to loosen the clamping ring 3-2.

[0070] When removing the outer locking device 3, if there is rust in front of the shaft head of the large gear hub 2, the rust must be removed first.

[0071] S3. Use a 15MPa pressure oil pump to fill the oil port 2-1 on both end faces of the large gear hub 2 with mineral lubricating oil through the oil passage 2-2 to the annular oil groove 2-3 on the circumferential surface of the inner hole d1 and d2, and maintain the pressure until the large gear hub 2 moves outward about 100mm along the axis of the support ring trunnion 1. During the pressure maintenance process, tighten the trunnion top screw 4-3 on the pressure cover 4-1 in the top pressure assembly 4, so that the large gear hub 2 moves out along the axis of the support ring trunnion 1.

[0072] 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. An elastic adaptive connection structure between a converter tilting device and a support ring, comprising a large gear hub and a support ring trunnion, wherein the large gear hub is sleeved on the support ring trunnion and is in transmission connection, characterized in that: The large gear wheel hub and the support ring trunnion are fitted with clearance fit; clamping devices are provided on both sides of the large gear wheel hub; the clamping devices include a clamp, a clamping ring, a bolt and a nut assembly; The clamp is in the shape of a semi-closed circular ring and is mounted on the large gear hub; the clamping ring is in the shape of a closed circular ring and is mounted on the clamp; the outer wall of the clamp and the inner wall of the clamping ring are both conical, and a wedge fit is formed by fitting the conical surfaces; the bolts are arranged along the axial direction of the clamping ring, and a plurality of bolts are evenly distributed on the circumference of the clamping ring; the nut assembly is connected to the bolts by threads, and the clamping ring is moved axially by screwing the nut assembly, so that the clamp is contracted radially by extrusion of the conical surface, and the large gear hub and the support ring ear shaft are tightly clamped under the radial extrusion force, and friction is generated on the contact surface between the support ring ear shaft and the large gear hub, thereby realizing torque transmission between the tilting device and the support ring.

2. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The conical surface is provided on the outer wall of the clamp, and the end face of the clamp is provided with through holes and disassembly threaded holes evenly distributed around the circumference. The end face of the clamping ring is provided with bolt holes corresponding to the through holes on the end face of the clamp, and the bolts pass through the through holes on the end face of the clamp and the bolt holes on the clamping ring, and are threadedly connected with the nut assembly to tighten the clamp and the clamping ring.

3. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The outer wall of the clamp is provided with two conical surfaces in opposite directions, and the diameters of the adjacent ends of the two conical surfaces are larger than the diameters on both sides; a clamping ring is correspondingly provided on each conical surface, and an axial gap is provided between the two clamping rings; the two clamping rings are provided with bolt holes evenly distributed around the circumference, the bolts are arranged in the bolt holes and are threadedly connected with the nut assembly to tighten the clamp and the clamping ring; the end face of one of the clamping rings is also provided with disassembly threaded holes evenly distributed around the circumference.

4. The elastic adaptive connection structure between the converter tilting device and the support ring according to any one of claims 1 to 3, characterized in that: The nut assembly includes a nut body, a hard pad and a push screw; the hard pad is sleeved on the bolt and located on the inner side of the nut body; the nut body is threadedly connected to the bolt; the push screw is threadedly connected to the nut body and abuts against the hard pad.

5. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The outer end of the support ring ear shaft is provided with a pressing assembly; the pressing assembly includes a pressure cover, an ear shaft top screw and a wheel hub top screw; the pressure cover is provided with a plurality of threaded holes and through holes, and the support ring ear shaft and the end face of the large gear hub are provided with a plurality of threaded holes corresponding to the through holes on the pressure cover; when the large gear hub is installed, the bolts are connected to the support ring ear shaft through the through holes of the pressure cover; the ear shaft top screw and the wheel hub top screw are respectively arranged in the threaded holes of the pressure cover, and respectively correspond to the end face of the support ring ear shaft and the end face of the large gear hub; when the large gear hub is disassembled, the bolts connecting the pressure cover and the end face of the support ring ear shaft are removed, and the pressure cover is connected to the end face of the large gear hub; the pressure cover is separated from the support ring ear shaft by the ear shaft top screw, thereby driving the large gear hub to move.

6. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 5 is characterized in that: An adjustable distance sleeve assembly is provided on the side of the large gear hub away from the pressure top assembly. The adjustable distance sleeve assembly is sleeved on the support ring ear shaft, and one end of the adjustable distance sleeve assembly is abutted against the shoulder of the support ring ear shaft, and the other end is abutted against the end face of the large gear hub to axially position the large gear hub.

7. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The diameters of the outer circles on both sides of the large gear hub are the same, both are d4, and the tolerance fit of the d4 diameter section is f6; the inner hole of the large gear hub is divided into three sections of different sizes, and the middle section diameter d3> the inner section diameter d1> the outer section diameter d2, and the tolerance fits of the inner section d1 and the outer section d2 are both H7; annular oil grooves are provided on the inner circumferential surfaces of the inner section d1 and the outer section d2 of the inner hole of the large gear hub, and oil channels connected to the respective oil grooves are provided at both ends; the inner hole and the two end heads of the outer circle of the large gear hub are provided with an introduction guide angle α, and α≤10°.

8. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 7 is characterized in that: The outer circle of the engaging section of the ear shaft and the inner hole of the large gear hub is divided into two sections of different sizes, namely the inner section d5 and the outer section d6, the tolerance fit of the two sections is g6, and the ends of the inner section d5 and the outer section d6 are both provided with an introduction guide angle β; the inner section d5 of the ear shaft is matched with the inner section d1 of the inner hole of the large gear hub, and the outer section d6 of the ear shaft is matched with the outer section d2 of the inner hole of the large gear hub, and an oil groove is opened on the surface of the two engaging sections along the axial direction.

9. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The conical surfaces of the clamp and the clamping ring have the same taper, and the taper is 2.0-3.5 degrees.

10. The elastic adaptive connection structure between the converter tilting device and the support ring according to claim 1 is characterized in that: The clamping device also includes a protective cover, and the clamp and the clamping ring are arranged in the protective cover.

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