A keyless connection structure of a converter tilting motor and a dismounting device and method thereof

Abstract

This invention provides a keyless connection structure for a converter tilting mechanism, along with its assembly and disassembly device and method. The structure includes a trunnion, an intermediate sleeve, and a large gear hub. The outer surface of the intermediate sleeve is conical, and the inner surface is cylindrical. The intermediate sleeve is fitted onto the trunnion. The large gear hub is mounted on the intermediate sleeve, and its inner circumferential surface is conical. Multiple first oil grooves are formed on the outer surface of the intermediate sleeve, and multiple second oil grooves are formed on the inner circumferential surface of the large gear hub. The first oil grooves are axially oriented, and the second oil grooves are annular. An oil passage is also formed on the large gear hub, with one end connected to the second oil groove and the other end connected to the end face of the large gear hub. This invention improves upon the problems of difficult assembly, long assembly time, and difficult maintenance of the large gear and trunnion in a converter tilting mechanism.

Description

Technical Field

[0001] This invention relates to the field of converter steelmaking technology in the metallurgical industry, and particularly to a keyless connection structure for a converter tilting mechanism, as well as its disassembly and assembly device and method. Background Technology

[0002] The converter tilting mechanism is one of the main pieces of equipment in steelmaking, its primary function being to transmit torque during converter tilting. Currently, the four-point fully suspended tilting mechanism is the most widely used in major steel plants, with the maximum tilting capacity mostly ranging from 500 to 1000 tm depending on the converter tonnage. Currently, the connection between the large gear and trunnion of domestic converter tilting mechanisms is a tangential key connection. The keyways on both the trunnion and the large gear are irregularly shaped, making it difficult to guarantee machining accuracy. Furthermore, since the trunnion and the large gear are usually manufactured in different plants, and even if they are manufactured in the same plant, considering the cost of disassembly and assembly, they are generally not pre-assembled during manufacturing and then disassembled and shipped to the site. In actual operation, the assembly process of the large gear of the tilting mechanism generally involves leaving machining allowance for the tangential key at the manufacturing plant, and then grinding and assembling it on-site according to the machining dimensions of the keyway on the trunnion and the large gear. On-site grinding and assembly time is usually 15 to 20 days. Furthermore, if the large gear of the converter tilting mechanism develops a defect that is difficult to repair and requires replacement, it necessitates destructive removal of the large gear, resulting in extremely difficult work, a long construction period, and a high risk of damaging the trunnion. Simultaneously, the tangential key connection method weakens the strength of both the trunnion and the hub of the large gear to varying degrees due to the presence of the keyway, thus requiring significant calculation factors during design, leading to a bulky structure. In other words, the existing connection structure between the large gear and trunnion of the converter tilting mechanism suffers from problems such as high assembly difficulty, long assembly time, and difficult maintenance.

[0003] Therefore, it is necessary to develop a new connection structure for the large gear and trunnion of the converter tilting mechanism to reduce the problems of high assembly difficulty, long assembly time, and difficult maintenance of the large gear and trunnion of the converter tilting mechanism. Summary of the Invention

[0004] The purpose of this invention is to provide a keyless connection structure for a converter tilting mechanism, as well as its disassembly and assembly device and method, to solve the problems of high assembly difficulty, long assembly time, and difficult maintenance of the large gear and trunnion of the existing converter tilting mechanism.

[0005] To solve the above-mentioned technical problems, the present invention provides a keyless connection structure for a converter tilting mechanism, including a trunnion, an intermediate sleeve, and a large gear hub. The outer surface of the intermediate sleeve is conical, and the inner surface is cylindrical. The intermediate sleeve is fitted onto the trunnion. The large gear hub is disposed on the intermediate sleeve, and the inner circumferential surface of the large gear hub is conical. A plurality of first oil grooves are formed on the outer surface of the intermediate sleeve, and a plurality of second oil grooves are formed on the inner circumferential surface of the large gear hub. The first oil grooves are arranged axially, and the second oil grooves are annular. An oil passage is also formed on the large gear hub, with one end connected to the second oil groove and the other end connected to the end face of the large gear hub.

[0006] Optionally, the number of the first oil grooves is four, and the four oil grooves are distributed at 90° intervals along the outer surface of the intermediate sleeve.

[0007] Optionally, the large end of the intermediate sleeve has a flange for limiting the mounting position of the large gear hub on the trunnion.

[0008] Optionally, after the large gear hub is installed, the trunnion extends a certain distance beyond the large gear hub.

[0009] This invention also provides a disassembly and assembly device for a keyless connection structure of a converter tilting mechanism, used for disassembling and assembling the aforementioned keyless connection structure of the converter tilting mechanism. The device includes a hydraulic thruster, a pressure cap, connecting bolts, a first hydraulic source, and a second hydraulic source. The hydraulic thruster includes a cylinder and a piston. The piston is disposed within the cylinder. The cylinder includes inner and outer ring bolt holes arranged sequentially from the inside to the outside. The pressure cap is located between the trunnion and the cylinder. The piston is located between the pressure cap and the cylinder. The first hydraulic source is connected to the cylinder for driving the piston along the trunnion within the cylinder. Axial movement, the second hydraulic source is connected to the oil passage; the disassembly and assembly device has an installation state and a disassembly state: in the installation state, the front of the gland is opposite to the end face of the trunnion and has a first gap, and the gland abuts against the large gear hub, the connecting bolt passes through the inner ring threaded hole and through the gland, and is threadedly connected to the trunnion; in the disassembly state, the back of the gland contacts the end face of the trunnion, and the gland has a second gap with the large gear hub, the connecting bolt passes through the outer ring threaded hole, and is threadedly connected to the large gear hub.

[0010] Optionally, the cylinder body has an annular structure, and the inner ring threaded hole and the outer ring threaded hole are formed on the end face of the cylinder body along the direction from the inner ring to the outer ring. An annular groove is formed between the inner ring threaded hole and the outer ring threaded hole on the end face of the cylinder body. The piston is annular and is disposed in the annular groove and can move relative to the annular groove along the axial direction of the trunnion. An oil hole penetrating the cylinder body is formed at the bottom of the annular groove.

[0011] Optionally, the hydraulic thruster may also include a lifting lug disposed on the cylinder body.

[0012] Optionally, the gland includes an annular gland body, the gland body having a first bolt hole, the trunnion having a first threaded hole, and the connecting bolt passing through the first bolt hole and threadedly connected to the first threaded hole.

[0013] Optionally, the front side of the cap body extends with a sleeve-shaped abutment portion, which abuts against the large gear hub in the installed state. The back side of the cap body extends with a positioning portion whose outer diameter is smaller than the outer diameter of the cap body. In the disassembled state, the positioning portion cooperates with the inner surface of the intermediate sleeve to radially position the cap.

[0014] This invention also provides a method for disassembling and assembling a keyless connection structure of a converter tilting mechanism. The method uses the aforementioned disassembly and assembly device and includes an installation method and a disassembly method. The installation method includes: fitting an intermediate sleeve onto a trunnion; moving the large gear hub along the trunnion axis towards the larger end of the intermediate sleeve, so that the large gear hub is fitted onto the intermediate sleeve; placing a pressure cap between the trunnion and the cylinder body, and positioning the piston between the pressure cap and the cylinder body, such that the front of the pressure cap faces the end face of the trunnion with a first gap, and that the pressure cap abuts against the large gear hub; and sequentially passing the connecting bolt through the inner ring threaded hole, the pressure cap, and then threadedly connecting it to the trunnion; connecting a first hydraulic source to the cylinder body, and connecting a second hydraulic source and the other end of the oil passage connected to the end face of the large gear hub; pressurizing the first and second hydraulic sources until the large gear hub is installed onto the intermediate sleeve. The disassembly method includes: placing the pressure cap between the trunnion and the cylinder body, and positioning the piston between the pressure cap and the cylinder body, so that the back of the pressure cap contacts the end face of the trunnion, and that the pressure cap has a second gap with the large gear hub; passing the connecting bolt through the outer ring threaded hole and then threadedly connecting it to the large gear hub; connecting the first hydraulic source to the cylinder body, and connecting the second hydraulic source and the oil passage to the other end of the large gear hub; pressurizing the first and second hydraulic sources until the large gear hub moves to a position where it can be directly removed from the intermediate sleeve; releasing the pressure of the first and second hydraulic sources, and disassembling the hydraulic thruster, pressure cap, connecting bolt, first hydraulic source, and second hydraulic source.

[0015] The present invention provides a keyless connection structure for a converter tilting mechanism, as well as its disassembly and assembly device and method, which has the following beneficial effects:

[0016] Multiple first oil grooves are formed on the outer surface of the intermediate sleeve, and multiple second oil grooves are formed on the inner circumferential surface of the large gear hub. An oil passage with one end connected to the second oil groove and the other end connected to the end face of the large gear hub is also formed on the large gear hub. Therefore, by injecting high-pressure hydraulic oil into the oil passage, the hydraulic oil flows to the first and second oil grooves, thereby expanding the large gear hub under axial force, allowing it to move on the intermediate sleeve. The high-pressure hydraulic oil also compresses and deforms the intermediate sleeve, pressing it tightly against the trunnion. When the injection of high-pressure hydraulic oil into the large gear hub stops, the large gear hub contracts. The outer surface of the intermediate sleeve is interference-fitted with the large gear hub, and the intermediate sleeve is interference-fitted with the trunnion. In this way, the power of the trunnion can be transmitted to the large gear hub through the intermediate sleeve, or the power of the large gear hub can be transmitted to the trunnion, thus realizing a keyless connection between the large gear hub and the trunnion. Therefore, it is convenient for the installation and maintenance of the large gear hub and the trunnion, and can save assembly and maintenance time. Since the first oil groove is arranged axially and the second oil groove is annular, the high-pressure hydraulic oil can be evenly distributed on the outer surface of the intermediate sleeve and the inner surface of the large gear hub. This allows the force of the high-pressure hydraulic oil to be evenly applied to the large gear hub and the intermediate sleeve, making the assembly of the large gear hub and the trunnion smoother. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the keyless connection structure of the converter tilting mechanism in an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the initial state of the large gear hub being assembled onto the trunnion in the keyless connection structure of the converter tilting mechanism in this embodiment of the invention.

[0019] Figure 3 This is a cross-sectional view of the completed state of the large gear hub being assembled onto the trunnion in the keyless connection structure of the converter tilting mechanism in this embodiment of the invention;

[0020] Figure 4 This is a cross-sectional view of the initial state of the large gear hub in the keyless connection structure of the converter tilting machine in an embodiment of the present invention, after it has been removed from the trunnion.

[0021] Figure 5 This is a cross-sectional view of the completed state of the large gear hub being removed from the trunnion in the keyless connection structure of the converter tilting motor in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100-Ternary shaft; 110-Shoulder; 120-First threaded hole; 200-Intermediate sleeve; 300-Large gear hub; 310-Second oil groove; 320-Oil passage; 400-Spacer sleeve; 410-First separator; 420-Second separator;

[0024] 500-Hydraulic thruster; 510-Cylinder body; 511-Inner ring bolt hole; 512-Outer ring bolt hole; 513-Annular groove; 520-Piston; 530-Lifting lug; 600-Gland cover; 610-Gland cover body; 620-Abutting part; 630-Positioning part; 640-First bolt hole; 700-Connecting bolt; 810-First hydraulic source; 820-Second hydraulic source; 900-Bearing seat. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 This is a cross-sectional view of the keyless connection structure of the converter tilting mechanism in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the initial state in which the large gear hub 300 is assembled onto the trunnion 100 in the keyless connection structure of the converter tilting mechanism in this embodiment of the invention. Figure 3 This is a cross-sectional view of the completed state of the large gear hub 300 being assembled onto the trunnion 100 in the keyless connection structure of the converter tilting mechanism in this embodiment of the invention. Figure 4 This is a cross-sectional view of the initial state of the large gear hub 300 in the keyless connection structure of the converter tilting mechanism in this embodiment of the invention, after it has been removed from the trunnion 100. Figure 5 This is a cross-sectional view of the completed state of the large gear hub 300 removed from the trunnion 100 in the keyless connection structure of the converter tilting motor in this embodiment of the invention. This embodiment provides a keyless connection structure for a converter tilting motor, including a trunnion 100, an intermediate sleeve 200, and a large gear hub 300. The outer surface of the intermediate sleeve 200 is conical, and the inner surface is cylindrical. The intermediate sleeve 200 is fitted onto the trunnion 100. The large gear hub 300 is disposed on the intermediate sleeve 200, and the inner circumferential surface of the large gear hub 300 is conical. A plurality of first oil grooves are formed on the outer surface of the intermediate sleeve 200, and a plurality of second oil grooves 310 are formed on the inner circumferential surface of the large gear hub 300. The first oil grooves are arranged axially, and the second oil grooves 310 are annular. An oil passage 320 is also formed on the large gear hub 300, with one end communicating with the second oil groove 310 and the other end communicating with the end face of the large gear hub 300.

[0032] By providing multiple first oil grooves on the outer surface of the intermediate sleeve 200 and multiple second oil grooves 310 on the inner circumferential surface of the large gear hub 300, and by providing an oil passage 320 with one end connected to the second oil groove 310 and the other end connected to the end face of the large gear hub 300, high-pressure hydraulic oil can be injected into the oil passage 320, causing the hydraulic oil to flow to the first and second oil grooves 310. This high-pressure hydraulic oil expands the large gear hub 300, allowing it to move on the intermediate sleeve 200 under axial force. The high-pressure hydraulic oil also compresses and deforms the intermediate sleeve 200, pressing it against the trunnion 100. When the injection of high-pressure hydraulic oil into the large gear hub 300 stops, the large gear hub 300 contracts, and the intermediate sleeve 20... The outer surface of the trunnion 100 is press-fitted with the large gear hub 300, and the intermediate sleeve 200 is press-fitted with the trunnion 100. This allows the power of the trunnion 100 to be transmitted to the large gear hub 300 via the intermediate sleeve 200, or vice versa, achieving a keyless connection between the large gear hub 300 and the trunnion 100. This facilitates the installation and maintenance of the large gear hub 300 and the trunnion 100, saving assembly and maintenance time. Since the first oil groove is axially oriented and the second oil groove 310 is annular, the high-pressure hydraulic oil can be evenly distributed on the outer surface of the intermediate sleeve 200 and the inner surface of the large gear hub 300. This ensures that the force of the high-pressure hydraulic oil acts evenly on the large gear hub 300 and the intermediate sleeve 200, making the assembly of the large gear hub 300 and the trunnion 100 smoother.

[0033] The number of the first oil grooves is four, and the four oil grooves are distributed at 90° intervals along the outer surface of the intermediate sleeve 200.

[0034] refer to Figure 1 The larger end of the intermediate sleeve 200, i.e., the end with the larger outer diameter, has a flange. This flange is used to restrict the mounting position of the large gear hub 300 on the trunnion 100. This facilitates the mounting of the large gear hub 300 onto the intermediate sleeve 200.

[0035] The taper of the outer circumferential surface of the intermediate sleeve 200 is 1:50.

[0036] refer to Figure 1 The trunnion 100 is a hollow shaft, which can improve the problem of stress concentration in the structure after keyless connection.

[0037] refer to Figure 1 After the large gear hub 300 is installed, the trunnion 100 extends a certain distance from the large gear hub 300 to reduce stress concentration at the end of the large gear hub 300, i.e., the trunnion 100.

[0038] refer to Figure 1 The trunnion 100 has a shoulder 110. The keyless connection structure of the converter tilting motor also includes a spacer 400. The spacer 400 is sleeved on the trunnion 100 and located between the shoulder 110 and the intermediate sleeve 200. It is used to adjust the position of the intermediate sleeve 200 installed on the trunnion 100, that is, to adjust the position of the large gear hub 300 installed on the trunnion 100.

[0039] refer to Figure 1 The spacer 400 includes a first spacer 410 and a second spacer 420. The first spacer 410 and the second spacer 420 are annular. One end of the first spacer 410 abuts against the shoulder 110, and one end of the second spacer 420 abuts against the intermediate sleeve 200. The other ends of the first spacer 410 and the second spacer 420 are connected by bolts. By adjusting the bolts, the axial distance between the first spacer 410 and the second spacer 420 can be adjusted, thereby adjusting the position of the intermediate sleeve 200 on the trunnion 100.

[0040] The first separator 410 has a first groove at one end, with the sidewall of the first groove extending to the inner ring of the first separator 410. The second separator 420 has a second groove at one end, with the sidewall of the second groove extending to the inner ring of the second separator 420. Where the first groove is provided, the inner surface of the first separator 410 has a certain gap with the trunnion 100; where the first groove is not provided, the inner surface of the first separator 410 is in clearance fit with the trunnion 100. Similarly, where the second groove is provided, the inner surface of the second separator 420 is in clearance fit with the trunnion 100; where the second groove is not provided, the inner surface of the second separator 420 is in clearance fit with the trunnion 100. This facilitates the installation of the spacer 400.

[0041] The trunnion 100 is mounted on the bearing housing 900.

[0042] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This embodiment also provides a disassembly and assembly device for a keyless connection structure of a converter tilting mechanism, including a hydraulic thruster 500, a pressure cap 600, connecting bolts 700, a first hydraulic source 810, and a second hydraulic source 820. The hydraulic thruster 500 includes a cylinder body 510 and a piston 520. The piston 520 is disposed within the cylinder body 510. The cylinder body 510 includes inner ring bolt holes 511 and outer ring bolt holes 512 arranged sequentially from the inside to the outside. The pressure cap 600 is located between the trunnion 100 and the cylinder body 510, and the piston 520 is located between the pressure cap 600 and the cylinder body 510. The first hydraulic source 810 is connected to the cylinder body 510 to drive the piston 520 along the trunnion within the cylinder body 510. The axial movement of shaft 100, the second hydraulic source 820 is connected to the oil passage 320, the disassembly and assembly device has an installation state and a disassembly state. In the installation state, the front of the pressure cover 600 is opposite to the end face of the trunnion 100 and has a first gap, and the pressure cover 600 abuts against the large gear hub 300. The connecting bolt 700 passes through the inner ring threaded hole, passes through the pressure cover 600, and is then threadedly connected to the trunnion 100. In the disassembly state, the back of the pressure cover 600 is in contact with the end face of the trunnion 100, and the pressure cover 600 has a second gap with the large gear hub 300. The connecting bolt 700 passes through the outer ring threaded hole and is threadedly connected to the large gear hub 300.

[0043] Since the second hydraulic source 820 is connected to the oil passage 320, hydraulic oil can flow from the second hydraulic source 820 to the first oil tank and the second oil tank 310, thereby expanding the large gear hub 300 with high-pressure hydraulic oil. The hydraulic thruster 500 includes a cylinder 510 and a piston 520, with the piston 520 disposed within the cylinder 510. The cylinder 510 includes inner ring bolt holes 511 and outer ring bolt holes 512 arranged sequentially from the inside to the outside. The pressure cap 600 is located between the trunnion 100 and the cylinder 510, and the piston 520 is located between the pressure cap 600 and the cylinder 510. The first hydraulic source 810 is connected to the cylinder 510. The piston 520 is used to drive the piston 520 to move axially within the cylinder 510. Therefore, the force exerted by the piston 520 on the gland 600 causes the piston 520 to move away from the cylinder 510, thus moving the cylinder 510 away from the gland 600. Since the large gear hub 300 can be expanded by high-pressure hydraulic oil, and in the installed state, the front face of the gland 600 faces the end face of the trunnion 100 with a first gap, and the gland 600 abuts against the large gear hub 300, the connecting bolt 700 passes through the inner ring threaded hole, through the gland 600, and is then threadedly connected to the trunnion 100. Therefore, when the... When the first hydraulic source 810 drives the piston 520 to move axially within the cylinder 510, the cylinder 510 remains stationary relative to the trunnion 100, while the piston 520 and the pressure cap 600 move relative to each other towards the trunnion 100. This causes the large gear hub 300, which abuts against the pressure cap 600, to move relative to the trunnion 100 towards the trunnion 100, thus pressing the large gear hub 300 against the intermediate sleeve 200. Since the large gear hub 300 can be expanded open by high-pressure hydraulic oil, and in the disassembled state, the back surface of the pressure cap 600 contacts the end face of the trunnion 100, and the pressure cap 600 and the large gear hub 300 have a first... With two gaps, the connecting bolt 700 passes through the outer ring threaded hole and is then threadedly connected to the large gear hub 300. Therefore, when the piston 520 is driven to move axially within the cylinder 510 by the first hydraulic source 810, the piston 520 remains stationary relative to the trunnion 100 and the pressure cap 600, while the cylinder 510 moves away from the trunnion 100. This causes the large gear hub 300, which is connected to the cylinder 510 by the connecting bolt 700, to move away from the trunnion 100 relative to it, thus removing the large gear hub 300 from the intermediate sleeve 200. The disassembly and assembly device has the characteristics of simple structure and convenient use.

[0044] refer to Figure 1The cylinder body 510 has an annular structure. The inner and outer threaded holes are formed on the end face of the cylinder body 510 along the direction from the inner to the outer ring. An annular groove 513 is formed between the inner and outer threaded holes on the end face of the cylinder body 510. The piston 520 is annular and is disposed within the annular groove 513, and can move axially relative to the annular groove 513 along the trunnion 100. An oil hole penetrating the cylinder body 510 is formed at the bottom of the annular groove 513. In this embodiment, there are two oil holes.

[0045] The hydraulic thruster 500 also includes a lifting lug 530 disposed on the cylinder body 510, which facilitates the installation and disassembly of the hydraulic thruster 500.

[0046] refer to Figure 1 The pressure cap 600 includes an annular pressure cap body 610, the pressure cap body 610 having a first bolt hole 640, the trunnion 100 having a first threaded hole 120, and the connecting bolt 700 passing through the first bolt hole 640 and threadedly connected to the first threaded hole 120.

[0047] The front of the pressure cap body 610 extends a sleeve-shaped abutment portion 620, which abuts against the large gear hub 300 in the installed state.

[0048] The back of the pressure cap body 610 extends a positioning part 630 with an outer diameter smaller than that of the pressure cap body 610. In the disassembled state, the positioning part 630 cooperates with the inner surface of the intermediate sleeve 200 to radially position the pressure cap 600.

[0049] The disassembly and assembly device also includes a fixing bolt. In the disassembled state, the pressure cap 600 is fixed to the end face of the trunnion 100 by the fixing bolt. At this time, the fixing bolt passes through the first bolt hole 640 and is threadedly connected to the first threaded hole 120.

[0050] This embodiment also provides a method for disassembling and assembling a keyless connection structure of a converter tilting mechanism. The disassembly and assembly method uses the disassembly and assembly device described in the above embodiment and includes an installation method and a disassembly method. The installation method includes:

[0051] Step S110: Place the intermediate sleeve 200 onto the trunnion 100.

[0052] In step S120, the large gear hub 300 is moved along the axial direction of the trunnion 100 towards the large end of the intermediate sleeve 200, so that the large gear hub 300 is fitted onto the intermediate sleeve 200.

[0053] In step S130, the pressure cap 600 is placed between the trunnion 100 and the cylinder 510, and the piston 520 is positioned between the pressure cap 600 and the cylinder 510, with the front face of the pressure cap 600 facing the end face of the trunnion 100 and having a first gap. The pressure cap 600 abuts against the large gear hub 300, and the connecting bolts 700 are sequentially passed through the inner ring threaded holes. The pressure cap 600 is then threadedly connected to the trunnion 100. The initial structure of the keyless connection structure of the converter tilting machine, in which the large gear hub 300 is assembled onto the trunnion 100, is as follows. Figure 2 As shown.

[0054] In step S140, the first hydraulic source 810 is connected to the cylinder 510, and the second hydraulic source 820 is connected to the other end of the oil passage 320 that is connected to the end face of the large gear hub 300.

[0055] In step S150, the first hydraulic source 810 and the second hydraulic source 820 are pressurized until the large gear hub 300 is installed in the appropriate position on the intermediate sleeve 200. The completed structure of the keyless connection structure of the converter tilting machine, in which the large gear hub 300 is assembled onto the trunnion 100, is as follows: Figure 3 As shown.

[0056] In step S160, the pressure of the first hydraulic source 810 and the second hydraulic source 820 is released, and the hydraulic thruster 500, the pressure cap 600, the connecting bolt 700, the first hydraulic source 810 and the second hydraulic source 820 are removed.

[0057] The disassembly method includes:

[0058] In step S210, the pressure cap 600 is positioned between the trunnion 100 and the cylinder 510, and the piston 520 is positioned between the pressure cap 600 and the cylinder 510, so that the back of the pressure cap 600 contacts the end face of the trunnion 100, and the pressure cap 600 has a second gap with the large gear hub 300. The connecting bolt 700 passes through the outer ring threaded hole and is then threadedly connected to the large gear hub 300. The initial state of the large gear hub 300 after being removed from the trunnion 100 in the keyless connection structure of the converter tilting machine is as follows. Figure 4 As shown.

[0059] In step S220, the first hydraulic source 810 is connected to the cylinder 510, and the second hydraulic source 820 is connected to the other end of the oil passage 320 that is connected to the end face of the large gear hub 300.

[0060] Step S230: Pressurize the first hydraulic source 810 and the second hydraulic source 820 until the large gear hub 300 moves to a position where it can be directly removed from the intermediate sleeve 200. The completed state of the large gear hub 300 being removed from the trunnion 100 in the keyless connection structure of the converter tilting machine is as follows. Figure 5 As shown.

[0061] In step S240, the pressure of the first hydraulic source 810 and the second hydraulic source 820 is released, and the hydraulic thruster 500, the pressure cap 600, the connecting bolt 700, the first hydraulic source 810 and the second hydraulic source 820 are removed.

[0062] In this embodiment, the process of installing the large gear hub 300 onto the trunnion 100 using the disassembly and assembly device is as follows:

[0063] First, clean the mating surfaces of the trunnion 100, spacer 400, and intermediate sleeve 200 with a suitable solvent;

[0064] Then, install the spacer 400 and press the spacer 400 against the shoulder 110 of the trunnion 100.

[0065] Next, install the intermediate sleeve 200. Specifically, the intermediate sleeve 200 is expanded by heating, and then the intermediate sleeve 200 is fitted onto the trunnion 100. The heating temperature is calculated based on the interference fit, and grinding is strictly prohibited.

[0066] Next, clean the mating surfaces of the large gear hub 300 and the intermediate sleeve 200, and make the area dust-free.

[0067] Next, position the large gear hub 300 appropriately.

[0068] Then, the large gear hub 300 is moved along the trunnion 100 axis toward the large end of the intermediate sleeve 200, so that the large gear hub 300 is fitted onto the intermediate sleeve 200.

[0069] Then, the pressure cap 600 is placed between the trunnion 100 and the cylinder 510, and the piston 520 is positioned between the pressure cap 600 and the cylinder 510, with the front face of the pressure cap 600 facing the end face of the trunnion 100 and having a first gap. The pressure cap 600 abuts against the large gear hub 300, and the connecting bolt 700 passes through the inner ring threaded hole. The pressure cap 600 is then threadedly connected to the trunnion 100. The initial structure of the keyless connection structure of the converter tilting machine, in which the large gear hub 300 is assembled onto the trunnion 100, is as follows. Figure 2 As shown.

[0070] Then, the first hydraulic source 810 is connected to the oil hole on the cylinder 510, and the second hydraulic source 820 is connected to the end of the oil passage 320 that is connected to the end face of the large gear hub 300.

[0071] Next, the second hydraulic source 820 is pressurized to 1MPa to ensure good contact between the large gear hub 300 and the intermediate sleeve 200.

[0072] Next, the axial position dimension of trunnion 100 and the overall levelness of large gear hub 300 were measured.

[0073] Then, remove all lifting and traction tools required for the movement of the tilting motor outside the hydraulic thruster 500 during the aforementioned process.

[0074] Then, slowly increase the pressure of the second hydraulic source 820 until the oil is evenly spread between the large gear hub 300 and the intermediate sleeve 200, and see oil seeping out from the joint surfaces of the intermediate sleeve 200 and the large gear hub 300.

[0075] Then, the oil pressure of the first hydraulic source 810 is increased to 20 MPa (up to 40 MPa if necessary).

[0076] Then, the oil pressure of the second hydraulic source 820 is increased to 100MPa (up to 120MPa if necessary).

[0077] Then, continuously check the position of the large gear hub 300, and stop pressurizing the second hydraulic source 820 after reaching the required distance.

[0078] Secondly, maintain the pressure of the first hydraulic source 810 for 24 hours.

[0079] Then, release the pressure of the second hydraulic source 820 and disconnect the connection between the second hydraulic source 820 and the end of the oil passage 320 that connects to the end face of the large gear hub 300.

[0080] Finally, remove the hydraulic thruster 500.

[0081] In this embodiment, the process of removing the large gear hub 300 from the trunnion 100 using the disassembly and assembly device is as follows:

[0082] First, the pressure cap 600 is positioned between the trunnion 100 and the cylinder 510, and the piston 520 is positioned between the pressure cap 600 and the cylinder 510, so that the back of the pressure cap 600 contacts the end face of the trunnion 100, and the pressure cap 600 has a second gap with the large gear hub 300. The connecting bolt 700 passes through the outer ring threaded hole and is then threadedly connected to the large gear hub 300. The initial state of the large gear hub 300 after being removed from the trunnion 100 in the keyless connection structure of the converter tilting machine is as follows. Figure 4 As shown.

[0083] Secondly, the first hydraulic source 810 is connected to the cylinder 510, and the second hydraulic source 820 is connected to the end of the oil passage 320 that is connected to the end face of the large gear hub 300.

[0084] Then, pressurize the second hydraulic source 820 to 100 MPa and wait for 30 minutes.

[0085] Next, observe whether the large gear hub 300 has any displacement along the trunnion 100 axis in a direction away from the trunnion 100, and slowly increase the pressure of the first hydraulic source 810 until the large gear hub 300 moves to a position where it can be directly removed from the intermediate sleeve 200. The completed state of the large gear hub 300 being removed from the trunnion 100 in the keyless connection structure of the converter tilting machine is as follows. Figure 5 As shown.

[0086] Then, release the pressure of the first hydraulic source 810 and the second hydraulic source 820, and remove the hydraulic thruster 500, the pressure cap 600, the connecting bolts 700, the first hydraulic source 810 and the second hydraulic source 820. The disassembly process is then complete.

[0087] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A disassembly and assembly device for a keyless connection structure of a converter tilting mechanism, characterized in that, This document describes the assembly and disassembly of a keyless connection structure for a converter tilting mechanism. The keyless connection structure includes a trunnion, an intermediate sleeve, and a large gear hub. The outer surface of the intermediate sleeve is conical, and the inner surface is cylindrical. The intermediate sleeve is fitted onto the trunnion. The large gear hub is mounted on the intermediate sleeve, and its inner circumferential surface is conical. Multiple first oil grooves are formed on the outer surface of the intermediate sleeve, and multiple second oil grooves are formed on the inner circumferential surface of the large gear hub. The first oil grooves are axially aligned, and the second oil grooves are annular. A portion of the large gear hub is also provided that connects to the second oil groove. The groove connects to an oil passage that is connected to the end face of the large gear hub at the other end. The disassembly and assembly device includes a hydraulic thruster, a pressure cap, connecting bolts, a first hydraulic source, and a second hydraulic source. The hydraulic thruster includes a cylinder and a piston. The piston is disposed in the cylinder. The cylinder includes inner ring bolt holes and outer ring bolt holes arranged sequentially from the inside to the outside. The pressure cap is located between the trunnion and the cylinder. The piston is located between the pressure cap and the cylinder. The first hydraulic source is connected to the cylinder to drive the piston to move axially along the trunnion in the cylinder. The second hydraulic source is connected to the oil passage. The disassembly / assembly device has an installation state and a disassembly state: In the installed state, the front of the gland faces the end face of the trunnion and has a first gap, and the gland abuts against the large gear hub. The connecting bolt passes through the inner ring bolt hole and through the gland, and is threadedly connected to the trunnion. In the disassembled state, the back of the pressure cap is in contact with the end face of the trunnion, and the pressure cap has a second gap with the large gear hub. The connecting bolt passes through the outer ring bolt hole and is threadedly connected to the large gear hub. The hydraulic thruster also includes a lifting lug mounted on the cylinder.

2. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 1, characterized in that, The number of the first oil grooves is four, and the four oil grooves are distributed at 90° intervals along the outer surface of the intermediate sleeve.

3. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 1, characterized in that, The large end of the intermediate sleeve has a flange, which is used to limit the mounting position of the large gear hub on the trunnion.

4. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 1, characterized in that, After the large gear hub is installed, the trunnion extends a certain distance from the large gear hub.

5. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 1, characterized in that, The cylinder body has an annular structure. The inner ring bolt holes and the outer ring bolt holes are opened on the end face of the cylinder body along the direction from the inner ring to the outer ring. An annular groove is opened between the inner ring bolt holes and the outer ring bolt holes on the end face of the cylinder body. The piston is annular and is disposed in the annular groove. It can move relative to the annular groove along the axial direction of the trunnion. An oil hole penetrating the cylinder body is opened at the bottom of the annular groove.

6. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 1, characterized in that, The gland includes an annular gland body, the gland body having a first bolt hole, the trunnion having a first threaded hole, and the connecting bolt passing through the first bolt hole and threadedly connected to the first threaded hole.

7. The disassembly and assembly device for the keyless connection structure of the converter tilting mechanism as described in claim 6, characterized in that, The front of the pressure cap body extends with a sleeve-shaped abutment portion. In the installed state, the abutment portion abuts against the large gear hub. The back of the pressure cap body extends with a positioning portion whose outer diameter is smaller than the outer diameter of the pressure cap body. In the disassembled state, the positioning portion cooperates with the inner surface of the intermediate sleeve to radially position the pressure cap.

8. A method for disassembling and assembling a keyless connection structure of a converter tilting mechanism, characterized in that, The disassembly and assembly are performed using the disassembly and assembly device as described in any one of claims 1 to 7, including an installation method and a disassembly method. The installation method includes: The intermediate sleeve is placed on the trunnion; Move the large gear hub along the trunnion axis toward the large end of the intermediate sleeve so that the large gear hub is fitted onto the intermediate sleeve. The gland is placed between the trunnion and the cylinder, and the piston is positioned between the gland and the cylinder. The front of the gland is opposite to the end face of the trunnion with a first gap. The gland abuts against the hub of the large gear. The connecting bolts pass through the inner ring bolt holes, the gland, and then are threadedly connected to the trunnion. Connect the first hydraulic source to the cylinder body, and connect the second hydraulic source to the other end of the oil passage that is connected to the end face of the large gear hub; Pressurize the first and second hydraulic sources until the large gear hub is installed in the appropriate position on the intermediate sleeve; Release the pressure from the first and second hydraulic sources, and remove the hydraulic thruster, gland, connecting bolts, first and second hydraulic sources; The disassembly method includes: The gland is placed between the trunnion and the cylinder, and the piston is positioned between the gland and the cylinder, so that the back of the gland contacts the end face of the trunnion, and the gland has a second clearance with the large gear hub. The connecting bolt passes through the outer ring bolt hole and is then threadedly connected to the large gear hub. Connect the first hydraulic source to the cylinder body, and connect the second hydraulic source to the other end of the oil passage that is connected to the end face of the large gear hub; Pressurize the first and second hydraulic sources until the large gear hub moves to a position where it can be directly removed from the intermediate sleeve; Release the pressure from the first and second hydraulic sources, and remove the hydraulic thruster, gland, connecting bolts, first hydraulic source, and second hydraulic source.

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