A quick shifting device for the intermediate shaft of the main motor of a wide and heavy plate rolling mill

Abstract

A rapid displacement device for the intermediate shaft of the main motor of a heavy plate rolling mill belongs to the technical field of hot rolling main motor maintenance equipment and is used for rapid displacement of the intermediate shaft. The technical solution is as follows: The lower end of the base has outwardly protruding steps at both ends. A movable support is placed on the top surface of the base and connected to the base via guide columns and guide holes. Right-angled triangular support blocks are fixed at both ends of the top surface of the movable support, with their inclined surfaces facing each other and supporting the intermediate shaft below. Two screw jacks are placed on the steps at both ends of the base, with their upper ends tightly connected to the bottom surface of the movable support. Two jack blocks are welded to the lower main motor rotor flange and the intermediate shaft flange, respectively. A hydraulic jack is placed between the two jack blocks. This invention enables rapid lifting, axial displacement, and return of the intermediate shaft, creating conditions for the core removal and disassembly of the main motor and improving work efficiency.

Description

Technical Field

[0001] This utility model relates to a device for rapidly shifting the intermediate shaft of the main motor of a heavy plate rolling mill, belonging to the technical field of hot rolling main motor maintenance equipment. Background Technology

[0002] In hot-rolled heavy plate production lines, the center distance between the output shafts of the upper and lower main motors is typically small, while the rotor and stator radii of the upper and lower main motors are large. Therefore, the upper and lower main motors are arranged in a staggered manner, and the lower main motor is connected to the main drive universal joint shaft via an intermediate shaft installed below the upper main motor to achieve torque and power transmission. When the lower main motor is undergoing core removal maintenance, the rotor and stator of the lower main motor must first be lifted together, and then the rotor is moved laterally for core removal, disassembly, and maintenance.

[0003] Structurally, the intermediate shaft has a positioning boss at one end and a groove at the other end. One end of the intermediate shaft is connected to the flange of the main drive universal joint shaft, and the other end is connected to the flange of the lower main motor rotor. It is positioned by the positioning boss and the groove, and the torque is transmitted by the positioning key.

[0004] Before disassembling the lower main motor rotor, the intermediate shaft needs to be lifted a certain distance to separate it from the bearing housing. The intermediate shaft is then moved axially a certain distance to separate the positioning groove of the intermediate shaft flange from the positioning boss of the lower main motor rotor. This ensures that the positioning groove and the positioning boss do not interfere with each other during the lifting and lateral movement of the lower main motor rotor and stator. However, due to the upper main motor and its foundation located above and on both sides of the intermediate shaft, the working space is limited. Furthermore, the connection end between the intermediate shaft and the main drive universal joint is usually located on the factory wall, making overhead crane operation impossible. Therefore, the relocation of the intermediate shaft is difficult. Typically, lifting and relocation can only be achieved with repeated alternation of chain hoists and overhead cranes, resulting in high workload for workers, long working hours, and severely impacting the main motor maintenance progress. Moreover, the heavy weight of the intermediate shaft poses significant equipment and personal safety hazards. Therefore, a new technical solution is urgently needed to solve these problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a rapid shifting device for the intermediate shaft of the main motor of a heavy plate rolling mill. This rapid shifting device can realize the rapid lifting, axial shifting and return of the intermediate shaft, thereby creating conditions for the core pulling and disassembly of the main motor. It is safe, reliable, convenient and fast, and can effectively reduce the workload of operators, shorten working time, improve work efficiency and ensure the maintenance progress of the main motor.

[0006] The technical solution to the above technical problem is:

[0007] A rapid shifting device for the intermediate shaft connection of the main motor of a heavy plate rolling mill includes a base, a movable support, a screw jack, a top block, and a hydraulic jack. The base is a vertically placed cuboid with outwardly protruding steps at both ends of its lower part. The top surface of the cuboid has two parallel vertical guide holes. The movable support is a horizontally placed cuboid, with its length exceeding the horizontal length of the base. The bottom surface of the movable support has two vertical guide posts with diameters and spacing matching the two guide holes of the base. The guide posts of the movable support are inserted into the guide holes of the base, connecting the movable support to the base. Right-angled triangular support blocks are fixed at both ends of the top surface of the cuboid. One right-angled side of each support block is connected to the top surface of the movable support, and the other right-angled side of the support block is located at the edge of the cuboid of the movable support. The two hypotenuses of the support blocks form a slope. The slopes of the two support blocks are supported below the intermediate shaft. Two screw jacks are placed on the protruding steps at both ends of the base. The upper ends of the top rods of the two screw jacks are tightly connected to the bottom ends of the movable support. Two top blocks are welded to the rotor flange of the lower main motor and the flange of the intermediate shaft, respectively. A hydraulic jack is placed between the two top blocks. The base and top rod of the hydraulic jack are tightly connected to the two top blocks, respectively.

[0008] The aforementioned rapid shifting device for the intermediate shaft of the main motor of the heavy plate rolling mill has multiple screw holes evenly distributed on the inclined surfaces of the two support blocks at both ends of the top surface of the movable support. The sliding plate is a rectangular plate with multiple mounting holes on its surface. The mounting holes are countersunk hexagonal holes. The positions of the multiple mounting holes match the screw holes on the inclined surfaces of the support blocks of the movable support. The two sliding plates are fixed to the inclined surfaces of the two support blocks of the movable support by hexagonal bolts. The sliding plate is provided with an oil guide and oil storage groove.

[0009] The aforementioned rapid shifting device for the intermediate shaft of the main motor of the heavy plate rolling mill includes a pad placed between the top surface of the base and the bottom surface of the movable support. The pad is a rectangular plate with two openings perpendicular to the edge of the plate on one side. The width of the openings matches the diameter of the guide post on the bottom surface of the movable support, and the distance between the two openings matches the distance between the two guide posts on the bottom surface of the movable support. The pad is inserted between the top surface of the base and the bottom surface of the movable support, with the guide post located in the opening. A handle is installed on one side of the pad, and the pad is available in various thicknesses.

[0010] The aforementioned rapid shifting device for the intermediate shaft of the main motor of the heavy plate rolling mill has a top block that is a T-shaped steel plate structure. The T-shaped sides of the two top blocks are welded to the rotor flange of the lower main motor and the flange of the intermediate shaft, respectively. The upper planes of the T-shaped top blocks are parallel and opposite to each other. Cylinder seats are welded to the lower ends of the front plate surface of the upper plane of the T-shaped top blocks. The inner side of the two cylinder seats is arc-shaped, and the radius of curvature of the arc shape matches the cylinder radius of the hydraulic jack. The lower part of the cylinder of the hydraulic jack is placed on the arc shape of the two cylinder seats.

[0011] The aforementioned rapid shifting device for the intermediate shaft of the main motor of the heavy plate rolling mill also includes a connecting plate. The connecting plate is a rectangular plate that is welded between the base and the bearing housing to connect the base and the bearing housing. The connecting plate is also welded between the base and the upper main motor foundation to connect the base and the upper main motor foundation.

[0012] The beneficial effects of this utility model are:

[0013] The base of this utility model supports the movable bracket through guide holes and guide columns. A screw jack is installed between the base and the movable bracket. The screw jack can raise the intermediate shaft located on the movable bracket, thereby separating the intermediate shaft from the bearing seat and creating conditions for the lateral movement of the intermediate shaft. A pad is placed between the upper top surface of the base and the lower bottom surface of the movable bracket. The pad has different thicknesses to adjust the height of the movable bracket. Two top blocks are welded to the lower main motor rotor flange and the intermediate shaft flange respectively. A hydraulic jack is placed between the two top blocks. The hydraulic jack can separate the lower main motor rotor flange and the intermediate shaft flange to realize the lateral movement of the intermediate shaft. A connecting plate is welded to the base, the bearing seat base, and the foundation below the upper main motor respectively to fix the base.

[0014] This utility model has a simple structure, is easy to use, stable, safe and reliable, has high implementation efficiency and low cost. It can realize the rapid lifting, axial displacement and return of the intermediate shaft, thereby creating conditions for the core pulling and disassembly of the main motor. It can effectively reduce the workload of operators, shorten working time, improve work efficiency and ensure the maintenance progress of the main motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a structural diagram of the base;

[0017] Figure 3 This is a schematic diagram of the movable support structure;

[0018] Figure 4 This is a structural diagram of a skateboard;

[0019] Figure 5 This is a schematic diagram of the pad block structure;

[0020] Figure 6 This is a schematic diagram of the top block structure;

[0021] Figure 7 This is a schematic diagram of the connection between the lifting and lateral movement shafts;

[0022] Figure 8 This is a structural diagram of the upper and lower main motors;

[0023] Figure 9 Schematic diagram of the installation structure of the intermediate shaft.

[0024] The following are marked in the diagram: Base 1, Movable bracket 2, Slide plate 3, Screw jack 4, Pad block 5, Top block 6, Hydraulic jack 7, Connecting plate 8, Step 9, Guide hole 10, Guide column 11, Support block 12, Inclined surface 13, Screw hole 14, Mounting hole 15, Oil guide reservoir 16, Opening slot 17, Handle 18, Cylinder seat 19, Upper main motor 20, Lower main motor 21, Lower main motor rotor 22, Lower main motor stator 23, Lower main motor rotor flange 24, Intermediate shaft 25, Intermediate shaft flange 26, Main drive universal joint 27, Positioning key 28, Bearing housing 29, Bearing housing base 30, Upper main motor foundation 31. Detailed Implementation

[0025] This utility model consists of a base 1, a movable support 2, a sliding plate 3, a spiral jack 4, a pad block 5, a top block, a hydraulic jack 7, and a connecting plate 8.

[0026] Figure 1 , 2 The display shows that the base 1 is a vertically placed cuboid. The lower ends of the cuboid of the base 1 have outward protruding steps 9 for placing the screw jack 4. There are two parallel vertical guide holes 10 on the top surface of the cuboid of the base 1 for connecting the movable bracket 2.

[0027] Figure 1 , 3 As shown, the movable support 2 is a horizontally placed cuboid. The length of the cuboid 2 is greater than the horizontal length of the base 1, and the thickness of the movable support 2 is the same as the thickness of the base 1. The movable support 2 is placed on the top surface of the base 1. The bottom surface of the cuboid of the movable support 2 has two vertical guide posts 11. The diameter and spacing of the guide posts 11 match the two guide holes 10 of the base 1. The guide posts 11 of the movable support 2 are inserted into the guide holes 10 of the base 1, connecting the movable support 2 to the base 1.

[0028] Figure 1 , 3The diagram shows that two screw jacks 4 are placed on the protruding steps 9 at both ends of the base 1, and the upper ends of the top rods of the two screw jacks 4 are tightly connected to the bottom ends of the movable support 2. The screw jacks 4 can lift the movable support 2 upwards, raising its position and causing the intermediate shaft 22 located above the movable support 2 to rise, thereby separating the intermediate shaft 22 from the bearing seat 25 and creating conditions for the lateral movement of the intermediate shaft 22.

[0029] Figure 1 , 3 As shown, right-angled triangular support blocks 12 are fixed at both ends of the top surface of the cuboid of the movable support 2. One right-angled side of each support block 12 is connected to the top surface of the movable support 2, and the other right-angled side of the support block 12 is located at the edge of the cuboid of the movable support 2. The two hypotenuses of the support block 12 form a slope 13. The slope 13 of the two support blocks 12 are supported below the intermediate shaft 22, and the two support blocks 12 support the intermediate shaft 22.

[0030] Figure 1 , 4 As shown, multiple screw holes 14 are evenly distributed on the inclined surfaces 13 of the two support blocks 12 at both ends of the top surface of the movable bracket 2. The slide plate 3 is a rectangular plate with multiple mounting holes 15 on its surface. The mounting holes 15 are countersunk hexagonal holes. The positions of the multiple mounting holes 15 match the screw holes 14 on the inclined surfaces 13 of the support blocks 12 of the movable bracket 2. The two slide plates 3 are fixed to the inclined surfaces 13 of the two support blocks 12 of the movable bracket 2 by hexagonal bolts. The slide plate 3 is provided with an oil guide and storage groove 16.

[0031] Figure 1 , 5 The display shows that a pad 5 is placed between the top surface of the base 1 and the bottom surface of the movable support 2. The pad 5 has different thicknesses to adjust the height of the movable support 2. The pad 5 is a rectangular plate with two openings 17 perpendicular to the edge of the plate on one side. The width of the openings 17 matches the diameter of the guide posts 11 on the bottom surface of the movable support 2, and the distance between the two openings 17 matches the distance between the two guide posts 11 on the bottom surface of the movable support 2. The pad 5 is inserted between the top surface of the base 1 and the bottom surface of the movable support 2, and the guide posts 11 are located in the openings 17 without affecting the insertion of the pad 5. A handle 18 is installed on one side of the pad 5 for easy insertion and removal. In use, pads 5 of different thicknesses can be selected as needed, and the height of the movable support 2 can be adjusted after the pad 5 is inserted.

[0032] Figure 1 , 6The diagram shows that top blocks 6 are welded to the surfaces of the lower main motor rotor flange 24 and the intermediate shaft flange 26, respectively. A hydraulic jack 7 is placed between the two top blocks 6, and the base and push rod of the hydraulic jack 7 are tightly connected to the two top blocks 6. When the hydraulic jack 7 is activated, it separates the lower main motor rotor flange 24 and the intermediate shaft flange 26 through the two top blocks 6.

[0033] Figure 6 The top block 6 is a T-shaped steel plate structure. The T-shaped sides of the two top blocks 6 are welded to the rotor flange 24 of the lower main motor and the intermediate shaft flange 26, respectively. The upper planes of the T-shaped top blocks 6 are parallel and opposite to each other. The lower ends of the front plate of the upper plane of the T-shaped top blocks 6 are welded to cylinder seats 19. The inner side of the two cylinder seats 19 is arc-shaped. The radius of curvature of the arc shape matches the cylinder radius of the hydraulic jack 7. The lower part of the cylinder of the hydraulic jack 7 is placed on the arc-shaped surface of the two cylinder seats 19. The cylinder seats 19 are used to support and constrain the hydraulic jack 7. The arc-shaped surface can make the hydraulic jack 7 stable.

[0034] Figure 1 As shown, the connecting plate 8 is a rectangular plate. The connecting plate 8 is welded between the bearing seat base 30 and the base 1 below the bearing seat 29, connecting the base 1 and the bearing seat base 30. The connecting plate 8 is also welded between the base 1 and the upper main motor base 31, connecting the base 1 and the upper main motor base 31.

[0035] Figure 7 The process of lifting and laterally moving the intermediate shaft 25 according to this utility model is as follows:

[0036] After connecting the base 1 and the movable bracket 2, place them on the left and right sides below the intermediate shaft 25. Use the connecting plate 8 to connect the base 1 to the bearing seat base 30 and to the upper main motor foundation 31. Lift the screw jack 4 so that the slide plate 3 installed on the movable bracket 2 contacts the intermediate shaft 25.

[0037] (2) Remove the main drive universal joint 27, remove the connecting bolts between the intermediate joint 25 and the lower main motor rotor flange 24, and remove the upper cover and bearing shell of the bearing seat 29.

[0038] (3) Weld the top blocks 6 at the corresponding positions on the intermediate shaft flange 26 and the lower main motor rotor flange 24 respectively, and place the hydraulic jack 7 between the two top blocks 6.

[0039] (4) Lift the left screw jack 4 to completely separate the intermediate shaft 25 and the bearing seat 29 without interference. At the same time, lift the right screw jack 4 to make the slide plate 3 and the intermediate shaft 25 without gap, so that the intermediate shaft flange 26 and the opening below the main motor rotor flange 24 have a certain gap. Place the pad 5 in the gap between the movable bracket 2 and the base 1, and lower the screw jack 4 slightly.

[0040] (5) Slowly drive the hydraulic jack 7 between the two top blocks 6 to move the intermediate shaft 25 away from the lower main motor 21, so that the positioning key 28 between the intermediate shaft flange 26 and the lower main motor rotor flange 24 is disengaged, the positioning boss is separated from the groove, and the intermediate shaft flange 26 and the lower main motor rotor flange 24 are separated, so that the lower main motor 21 has the conditions for lifting, creating conditions for the subsequent maintenance of the main motor quickly.

[0041] (6) When the intermediate shaft 25 is in position, use bolts to close the intermediate shaft flange 26 and the lower main motor rotor flange 24, and use the screw jack 4 to lower the movable bracket 2 so that the intermediate shaft 25 can be quickly reinstalled in position.

[0042] An embodiment of this utility model is as follows:

[0043] The main body of base 1 is 400mm long, 300mm wide, and 700mm high; the step 9 is 300mm long, 200mm wide, and 200mm high; and the guide hole 10 is 60mm in diameter.

[0044] The movable bracket 2 is 800mm long, 300mm wide, and 200mm high. The guide post 11 is 60mm in diameter and 350mm long. The support block 12 is 300mm long, 205mm wide, and 180mm high. The screw hole 14 on the inclined surface 13 is M16 in diameter.

[0045] The slide plate 3 is 300mm long, 250mm wide, and 20mm thick. The mounting hole 15 has an M16 internal hex countersunk hole in diameter, and the oil guide reservoir 16 has a width of 2mm.

[0046] The screw jack 4 is model number 20T (National Standard).

[0047] The pad 5 is 300mm long, 400mm wide, and has three thicknesses: 20mm, 10mm, and 5mm. The opening slot 17 is 180mm long and 60mm wide. The handle 18 has a diameter of 5mm and a total length of 190mm.

[0048] The top block 6 has a length of 200mm, a width of 30mm, and a height of 200mm;

[0049] The model of the hydraulic jack 7 is: short type 1000 tons equipped with CP-700 manual pump (50mm stroke).

[0050] The connecting plate 8 has a length of 500-1000mm, a width of 150mm, and a thickness of 20mm.

Claims

1. A rapid shifting device for the intermediate shaft of the main motor of a heavy plate rolling mill, characterized in that: It includes a base (1), a movable support (2), a screw jack (4), a top block (6), and a hydraulic jack (7). The base (1) is a vertically placed cuboid. The bottom two ends of the cuboid of the base (1) have outwardly protruding steps (9). The top surface of the cuboid of the base (1) has two parallel vertical guide holes (10). The movable support (2) is a horizontally placed cuboid. The length of the cuboid of the movable support (2) is greater than the horizontal length of the base (1). The bottom surface of the cuboid of the movable support (2) has two vertical guide posts (11). The diameter and spacing of the guide posts (11) match the two guide holes (10) of the base (1). The guide posts (11) of the movable support (2) are inserted into the guide holes (10) of the base (1) to connect the movable support (2) to the base (1). The top two ends of the cuboid of the movable support (2) are fixed with right-angled triangular supports. Support blocks (12), one right-angled side of each support block (12) is connected to the top surface of the movable bracket (2), the other right-angled side of the support block (12) is located at the cuboid edge of the movable bracket (2), the two inclined sides of the support block (12) form an inclined surface (13), the inclined surfaces (13) of the two support blocks (12) are opposite to each other, the inclined surfaces (13) of the two support blocks (12) are supported below the intermediate shaft (25), the two screw jacks (4) are respectively placed on the protruding steps (9) at both ends of the base (1), the upper ends of the top rods of the two screw jacks (4) are tightly connected to the bottom ends of the movable bracket (2), the two top blocks (6) are respectively welded to the top surface of the lower main motor rotor flange (24) and the intermediate shaft flange (26), the hydraulic jack (7) is placed between the two top blocks (6), the base and the top rod of the hydraulic jack (7) are respectively tightly connected to the two top blocks (6).

2. The rapid shifting device for the intermediate shaft of the main motor of a heavy plate rolling mill according to claim 1, characterized in that: The movable bracket (2) has multiple screw holes (14) evenly distributed on the inclined surfaces (13) of the two support blocks (12) at both ends of the top surface. The slide plate (3) is a rectangular plate with multiple mounting holes (15) on its surface. The mounting holes (15) are countersunk hexagonal holes. The positions of the multiple mounting holes (15) match the screw holes (14) on the inclined surfaces (13) of the support blocks (12) of the movable bracket (2). The two slide plates (3) are fixed to the inclined surfaces (13) of the two support blocks (12) of the movable bracket (2) by hexagonal bolts. The slide plate (3) is provided with an oil guide and storage groove (16).

3. The rapid shifting device for the intermediate shaft of the main motor of a heavy plate rolling mill according to claim 1, characterized in that: A pad (5) is placed between the top surface of the base (1) and the bottom surface of the movable support (2). The pad (5) is a rectangular plate, and there are two openings (17) on one side of the plate surface perpendicular to the edge of the plate surface. The width of the openings (17) is equal to the diameter of the guide post (11) on the bottom surface of the movable support (2). Matching, the distance between the two opening slots (17) matches the distance between the two guide posts (11) on the bottom surface of the movable bracket (2), the pad (5) is inserted between the top surface of the base (1) and the bottom surface of the movable bracket (2), the guide post (11) is located in the opening slot (17), the pad (5) has a handle (18) installed on one side, and the pad (5) has various thicknesses.

4. The rapid shifting device for the intermediate shaft of the main motor of the heavy plate rolling mill according to claim 1, characterized in that: The top block (6) is a T-shaped steel plate structure. The T-shaped side of the two top blocks (6) is welded to the top surface of the lower main motor rotor flange (24) and the intermediate shaft flange (26) respectively. The upper T-shaped planes of the two top blocks (6) are parallel to each other. The lower ends of the front plate of the upper T-shaped plane of the two top blocks (6) are welded to cylinder seats (19). The inner side of the two cylinder seats (19) is arc-shaped. The radius of curvature of the arc shape matches the cylinder radius of the hydraulic jack (7). The lower part of the cylinder of the hydraulic jack (7) is placed on the arc shape of the two cylinder seats (19).

5. The rapid shifting device for the intermediate shaft of the main motor of a heavy plate rolling mill according to claim 1, characterized in that: It also has a connecting plate (8), which is a rectangular plate. The connecting plate (8) is welded between the base (1) and the bearing seat base (30) to connect the base (1) and the bearing seat base (30). The connecting plate (8) is also welded between the base (1) and the upper main motor base (31) to connect the base (1) and the upper main motor base (31).

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