Assembly device of rolling mill main motor rotor

Abstract

The utility model belongs to the technical field of assembly of rolling mill main motor rotors, and particularly relates to an assembly device of a rolling mill main motor rotor. Comprising a stator, a rotor and a travelling crane, the rotor is installed in the stator, the non-load end of the rotor is installed on a bearing seat, the load end of the rotor is provided with a half coupling, the travelling crane is located above the bearing seat, the half coupling is connected with a lengthened coupling in a bolted mode, and the travelling crane is connected with a horizontal lifting appliance in a hung mode through a steel wire rope. A supporting frame is placed on the ground on the outer side of the bearing seat, supporting blocks are inserted into the two ends of the supporting frame, a jack is installed at the bottom of the stator, and a laser range finder and a gradienter are installed on the stator. The tool is simple in structure, low in manufacturing cost, simple and convenient to operate, suitable for assembling the rolling mill main motor rotor with large dead weight, free of assistance of a truck crane and traction of laying a track in the operation process, high in safety and practicability and wide in applicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembling a rotor of a main motor of a rolling mill, and in particular relates to an assembling device for the rotor of a main motor of a rolling mill. Background Art

[0002] At present, in the production process of wide and thick plates, the rotor of the main motor of the rolling mill is the core component to ensure the efficient operation of the equipment, but it may be worn, damaged and other problems after long-term use, and needs to be replaced. The main motor of the rolling mill is a 9000kW AC speed-regulating synchronous motor with a voltage of 3000V. The rotor of the main motor weighs 90t, the stator of the main motor weighs 76t, the lifting weight is 111 tons, the diameter of the main motor rotor is 3.03m, and the air gap is 20mm. The main task of replacing the rotor of the main motor of the rolling mill is to pull out the rotor of the lower motor, inspect and repair the stator, and replace the rotor. The construction has the characteristics of long construction period, narrow construction site, large equipment tonnage, small relative gap between the rotor and the stator, time-consuming access, relatively high altitude, more oil pollution, disassembly and installation rely on driving, and frequent use of lifting tools, which has certain construction difficulties.

[0003] In view of the above shortcomings, the industry has developed a variety of motor rotor assembly hangers, such as Chinese Patent 204559335U. This utility model provides a motor rotor assembly hanger, including a bent beam, a movable slider and a sleeve; the bent beam is composed of a vertical beam and a horizontal beam vertically connected; a plurality of positioning holes are arranged at equal intervals on the horizontal beam of the bent beam; the movable slider is sleeved on the horizontal beam of the bent beam, and a fixing hole is arranged on the side of the movable slider; a lifting ring is arranged on the top of the movable slider; a sleeve is arranged horizontally at the bottom end of the vertical beam of the bent beam, and the center line of the sleeve is parallel to the horizontal beam of the bent beam; a convex ring is arranged on the outer circumference of one end of the sleeve, and the other end is inserted into the sleeve; a conical surface is arranged at the rotor shaft socket of the sleeve; a rib plate is arranged at the vertical connection between the vertical beam and the horizontal beam of the bent beam. The motor rotor assembly hanger can meet the requirements of various types of rotor hoisting, has good universality, and can effectively improve assembly efficiency. Another example is the utility model of Chinese patent 215516422U, which discloses a motor rotor assembly hoist, including a horizontal arm and a vertical arm connected to each other; a hoisting assembly, including a screw rod rotatably connected to the horizontal arm and a sliding member slidably arranged on the horizontal arm, the screw rod drives the sliding member to slide by rotating, and the sliding member is used to connect with the lifting equipment; a horizontal detector, which is arranged on the horizontal arm and is used to detect the horizontal position of the horizontal arm; a driving device, which is used to drive the screw rod to rotate; a fixing kit, which is arranged at the free end of the vertical arm and is used to be sleeved with the rotor driving end. The motor rotor assembly hoist is easy to disassemble and assemble, improves the disassembly and assembly efficiency and disassembly and assembly accuracy of the rotor and stator, and ensures the quality of the motor. Both of the above devices cannot solve the hoisting of large rotors weighing 90t, and there are certain safety hazards. Therefore, it is necessary to develop a new, convenient and efficient rolling mill main motor rotor assembly hoist device. Summary of the invention

[0004] The utility model aims to provide an assembly device for a rotor of a main motor of a rolling mill to solve the problems existing in the prior art.

[0005] The utility model solves the technical problem by adopting the following technical scheme: an assembly device for the rotor of the main motor of a rolling mill, comprising a stator, a rotor and a crane, wherein the rotor is installed in the stator, the non-load end of the rotor is installed on the bearing seat, a half coupling is installed on the load end of the rotor, the crane is located above the bearing seat, an extended coupling is bolted on the half coupling, a horizontal sling is hung on the crane through a steel wire rope, a plurality of stops, side stops and a hoisting shaft are welded on the horizontal sling, the horizontal sling is hung on both ends of the rotor through a steel wire rope passing through the stop and a hand winch, a support frame is placed on the ground outside the bearing seat, support blocks are plugged at both ends of the support frame, a jack is installed at the bottom of the stator, and a laser rangefinder and a level are installed on the stator.

[0006] Furthermore, there are three stops, the welding positions of the stops are located on the central axis of the top surface of the horizontal hanger, the distance between two adjacent stops is greater than the width of the stator, there are four lifting axes, and the four lifting axes are symmetrically welded on both sides of the horizontal hanger in pairs, and there are two side stops, which are located at both ends of the top surface of the horizontal hanger and on the outside of the stop.

[0007] Furthermore, the stopper is in the shape of a gate, with the open end of the gate-shaped stopper facing the horizontal hoist, the steel wire rope passes through the inner cavity of the gate-shaped stopper, the cross-section of the lifting shaft is T-shaped and the longitudinal section is circular, the crane is hung on the lifting shaft of the horizontal hoist through the steel wire rope, the side guard is in the shape of a straight plate, the side guard is welded on the horizontal hoist at an angle and the inclination direction of the two side guards are both toward the middle of the horizontal hoist.

[0008] Furthermore, the extended coupling is tubular, a flange is provided at one end of the extended coupling, the extended coupling is bolted to the rotor shaft end through the flange, and two lifting ears are welded on the side of the extended coupling.

[0009] Furthermore, boxes are welded at both ends of the support frame, support blocks are placed in the boxes, and two lifting shafts are welded on both sides of the support frame. The cross section of the lifting shaft is T-shaped and the longitudinal section is circular.

[0010] Furthermore, the support block is a sleeper, the upper part of the box is open, and arc-shaped notches are provided on the box and the support block. The diameter of the notch on the support block is the diameter of the rotor shaft end, and the height of the notch on the support block is higher than the height of the notch on the box.

[0011] Furthermore, the jack is a one-to-four synchronous jack, and the four lifting ends of the jack are symmetrically located at four corners below the stator.

[0012] Furthermore, the laser rangefinder is located in the middle of the upper surface of the stator and the measuring end of the laser rangefinder faces the horizontal hanger. There are four levels, which are respectively pasted on the four side surfaces of the bottom of the stator.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model has a simple structure, low production cost, and simple operation method. It is suitable for assembling the rotor of the main motor of a heavy rolling mill. During the operation, there is no need to use a car crane for assistance, and there is no need to lay tracks for traction. It has strong safety and practicality and wide applicability.

[0015] 2. Use the existing crane in the workshop to lift and translate the rotor, and use the jack to lift the stator. There is no need to use a car crane or lay tracks for traction. It can adapt to narrow operating spaces and has strong practicality and wide applicability.

[0016] 3. The distance between the stator and the rotor is monitored at any time by a laser rangefinder and a level meter, and a rubber pad is installed between the stator and the rotor to prevent the stator and the rotor from colliding, thereby avoiding damage to the motor and improving operating efficiency.

[0017] 4. The rotor can be hoisted and the wire rope can be replaced by a horizontal hoist, and the rotor can be leveled at any time, which improves the convenience and practicality of operation.

[0018] 5. The main motor rotor is placed on the support frame, which is convenient for safe and reliable transportation and maintenance of the main motor rotor. The rotor is supported by the support block, which can effectively prevent the rotor from rotating on its own. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the horizontal hanger of the utility model.

[0021] Figure 3 It is a front structural schematic diagram of the support frame of the utility model.

[0022] Figure 4 It is a schematic diagram of the side structure of the support frame of the utility model.

[0023] Figure 5 It is a schematic diagram of the structure of the utility model after the stator and the rotor are lifted.

[0024] Figure 6 It is a schematic diagram of the structure of the utility model when the rotor is translated.

[0025] Figure 7 It is a schematic diagram of the structure of the utility model after the rotor is placed on the support frame.

[0026] Among them: 1. stator; 2. rotor; 3. crane; 4. bearing seat; 5. extended coupling; 6. horizontal lifting device; 7. stopper; 8. side stopper; 9. lifting shaft; 10. wire rope; 11. hand chain hoist; 12. support frame; 13. support block; 14. jack; 15. laser rangefinder; 16. level; 17. flange; 18. lifting lug; 19. box; 20. notch; 21. half coupling. DETAILED DESCRIPTION

[0027] The utility model will now be further described in detail with reference to the accompanying drawings.

[0028] Embodiment 1:

[0029] like Figure 1-4 As shown, an assembly device for the rotor of the main motor of a rolling mill includes a stator 1, a rotor 2, and a crane 3. The rotor 2 is installed in the stator 1, the non-load end of the rotor 2 is installed on the bearing seat 4, the load end of the rotor 2 is installed with a half coupling 21, the crane 3 is located above the bearing seat 4, an extended coupling 5 is bolted to the half coupling 21, a horizontal sling 6 is hung on the crane 3 through a wire rope 10, a plurality of stops 7, side stops 8, and a lifting shaft 9 are welded on the horizontal sling 6, the horizontal sling 6 is hung on both ends of the rotor 2 through the wire rope 10 passing through the stop 7 and a hand winch 11, a support frame 12 is placed on the ground outside the bearing seat 4, support blocks 13 are inserted at both ends of the support frame 12, a jack 14 is installed at the bottom of the stator 1, and a laser rangefinder 15 and a level 16 are installed on the stator 1.

[0030] There are three stoppers 7, and the welding position of the stoppers 7 is located on the central axis of the top surface of the horizontal hanger 6. The distance between two adjacent stoppers 7 is greater than the width of the stator 1. There are four lifting shafts 9, and the four lifting shafts 9 are symmetrically welded on both sides of the horizontal hanger 6. There are two side stops 8, and the side stops 8 are located at both ends of the top surface of the horizontal hanger 6 and on the outside of the stoppers 7.

[0031] The stopper 7 is in the shape of a gate, and the open end of the gate of the stopper 7 faces the horizontal spreader 6. The wire rope 10 passes through the inner cavity of the gate of the stopper 7. The cross section of the lifting shaft 9 is T-shaped and the longitudinal section is circular. The crane 3 is hung on the lifting shaft 9 of the horizontal spreader 6 through the wire rope 10. The side block 8 is in the shape of a straight plate. The side block 8 is welded to the horizontal spreader 6 at an angle and the inclination directions of the two side blocks 8 are both toward the middle of the horizontal spreader 6.

[0032] The extended coupling 5 is tubular, and a flange 17 is provided at one end of the extended coupling 5 . The extended coupling 5 is bolted to the shaft end of the rotor 2 through the flange 17 . Two lifting ears 18 are welded to the side of the extended coupling 5 .

[0033] Boxes 19 are welded at both ends of the support frame 12, and support blocks 13 are placed in the box 19. Two lifting shafts 9 are welded on both sides of the support frame 12. The lifting shafts 9 have a T-shaped cross section and a circular longitudinal section.

[0034] The support block 13 is a sleeper, the upper part of the box 19 is open, and both the box 19 and the support block 13 are provided with an arc-shaped notch 20. The diameter of the notch 20 on the support block 13 is the diameter of the shaft end of the rotor 2, and the height of the notch 20 on the support block 13 is higher than the height of the notch 20 on the box 19.

[0035] The jack 14 is a one-to-four synchronous jack 14 , and the four lifting ends of the jack 14 are symmetrically located at the four corners below the stator 1 .

[0036] The laser rangefinder 15 is located in the middle of the top surface of the stator 1 and the measuring end of the laser rangefinder 15 faces the horizontal hanger 6. There are four levels 16, which are respectively attached to the four side surfaces of the bottom of the stator 1.

[0037] Embodiment 2:

[0038] Take the disassembly of rotor 2 of the finishing main motor equipped with a 9000kW AC speed regulating synchronous motor as an example. The voltage of the finishing main motor is 3000V, the weight of rotor 2 is 90t, the weight of stator 1 is 76t, the lifting weight is 111 tons, the diameter of rotor 2 is 3.03m, and the air gap is 20mm.

[0039] like Figure 1-7 As shown, the following steps are followed when removing the rotor 2 of the finishing main motor:

[0040] (1) When disassembling the rotor 2, first disassemble the relevant connections, place a rubber pad between the rotor 2 and the stator 1 to prevent the stator 1 and the rotor 2 from directly colliding, and support the load shaft end of the rotor 2 with a support made of welded steel structure. At this time, separate the coupling connected to the load end of the rotor 2, and retain the half-coupling 21 connecting the coupling and the rotor 2. Bolt the extended coupling 5 to the half-coupling 21 with the lifting ear 18 facing upward, and then remove the support made of welded steel structure.

[0041] (2) Connect the hook of the crane 3 and the lifting shaft 9 of the horizontal sling 6 through the wire rope 10 to ensure that the horizontal sling 6 remains horizontal. Connect the lifting lug 18 of the extended coupling 5 and one end of the horizontal sling 6 through the wire rope 10 and the hand winch 11. Connect the non-load shaft end of the rotor 2 and the other end of the horizontal sling 6 through the wire rope 10 and the hand winch 11. Make the wire rope 10 located in the stopper 7. Lift the two ends of the rotor 2 through the hand winch 11. The lifting distance is less than 10 mm. Make the wire rope 10 taut. Use a caliper to check whether the gap between the stator 1 and the rotor 2 is uniform. If it is not uniform, use the hand winch 11 to level the rotor 2.

[0042] (3) Install the jack 14, the level 16, and the laser rangefinder 15, adjust the lifting height of the four lifting ends of the jack 14, make the four levels 16 in a horizontal state, and lift the four lifting ends of the jack 14 synchronously. The lifting height is below 30 mm. During the lifting process, constantly check the horizontality of the level 16 and the distance measured by the laser rangefinder 15 to ensure that the lifting height is below 30 mm and the stator 1 remains horizontal. Use a caliper to check whether the gap between the stator 1 and the rotor 2 is uniform. If it is uneven, use the hand winch 11 to level the rotor 2. After lifting, use a steel plate or other support to pad the bottom of the stator 1, and use a rotation method to raise the four lifting ends of the jack 14 one by one.

[0043] (4) The rotor 2 is lifted by the crane 3 to a height below 30 mm. During the lifting process, the distance measured by the laser rangefinder 15 is continuously checked to ensure that the lifting height is below 30 mm. A caliper is used to check whether the gap between the stator 1 and the rotor 2 is uniform. If it is not uniform, the rotor 2 is leveled by the hand winch 11.

[0044] (5) Repeat the operation of step (3) to step (4) until the bottom end of the stator 1 is higher than the bearing seat 4. At this time, the rotor 2 is translated toward the side of the bearing seat 4 by the crane 3. When the stopper 7 in the middle position of the horizontal sling 6 exceeds the stator 1, a part of the load shaft end of the rotor 2 also exceeds the stator 1. The horizontal sling 6 and the end of the load shaft end of the rotor 2 that exceeds the stator 1 are connected by the wire rope 10 and the hand winch 11. The wire rope 10 is passed through the stopper 7 in the middle of the horizontal sling 6. At this time, the wire rope 10 and the hand winch 11 on the extension coupling 5 are removed, and the rotor 2 is continued to be translated and placed on the support frame 12. During the translation process, the distance measured by the laser rangefinder 15 is checked, and a caliper is used to check whether the distance between the stator 1 and the rotor 2 is uniform. If it is not uniform, the rotor 2 is leveled by the hand winch 11.

[0045] Embodiment 3:

[0046] Take the installation of rotor 2 of the finishing main motor equipped with a 9000kW AC speed regulating synchronous motor as an example. The voltage of the finishing main motor is 3000V, the weight of rotor 2 is 90t, the weight of stator 1 is 76t, the lifting weight is 111 tons, the diameter of rotor 2 is 3.03m, and the air gap is 20mm.

[0047] like Figure 1-7 As shown, the following steps are followed when installing the rotor 2 of the finishing main motor:

[0048] (1) Install the jack 14, the level 16, and the laser rangefinder 15, and synchronously lift the four lifting ends of the jack 14 to lift the bottom end of the stator 1 above the bearing seat 4. During the lifting process, continuously pad the bottom of the stator 1 with steel plates or other supports, and raise the four lifting ends of the jack 14 one by one in a rotating manner. Adjust the lifting height of the four lifting ends of the jack 14 so that the four level gauges 16 are all in a horizontal state, place the rotor 2 on the support frame 12, install the half coupling 21 on the load shaft end of the rotor 2, bolt the extended coupling 5 to the half coupling 21, and make the lifting ear 18 face upward.

[0049] (2) Connect the hook of the crane 3 and the lifting shaft 9 of the horizontal sling 6 through the wire rope 10 to ensure that the horizontal sling 6 remains horizontal. Connect the non-load shaft end of the rotor 2 and one end of the horizontal sling 6 through the wire rope 10 and the hand winch 11, and place the wire rope 10 in the stopper 7 at one end of the horizontal sling 6. Connect the part of the load shaft of the rotor 2 close to the rotor 2 and the middle part of the horizontal sling 6 through the wire rope 10 and the hand winch 11, and place the wire rope 10 in the stopper 7 in the middle of the horizontal sling 6. Lift the rotor 2 through the crane 3 until the central axis of the rotor 2 is at the same height as the stator 1. Adjust the rotor 2 through the hand winch 11 to make it coaxial with the stator 1. Translate the rotor 2 through the crane 3 so that the load shaft end of the rotor 2 passes through the stator 1. Stator 1, at this time, connect the ear 18 of the extended coupling 5 and one end of the horizontal sling 6 through the wire rope 10 and the hand winch 11, and make the wire rope 10 located in the stopper 7 at one end of the horizontal sling 6, remove the wire rope 10 and the hand winch 11 connected to the rotor 2 in the middle part of the horizontal sling 6, and continue to translate the rotor 2 until the rotor 2 is located in the stator 1. After the rotor 2 enters the stator 1, place a rubber pad between the rotor 2 and the stator 1, and move the rotor 2 down through the hand winch 11. The downward moving distance is less than 10 mm. Check the laser rangefinder 15 during the translation and downward movement, and use a caliper to check whether the spacing between the stator 1 and the rotor 2 is uniform to prevent bumps. If it is uneven, use the hand winch 11 to level the rotor 2.

[0050] (3) Pull out part of the steel plate or other supporting materials, control the jack 14 to move the stator 1 downward, and keep the downward movement distance below 30 mm. During the downward movement, constantly check the horizontality of the level meter 16 and the distance measured by the laser rangefinder 15 to ensure that the downward movement distance is below 30 mm and the stator 1 remains horizontal. After the downward movement, use a caliper to check whether the gap between the stator 1 and the rotor 2 is uniform. If it is not uniform, use the hand winch 11 to level the rotor 2.

[0051] (4) Control the crane 3 to move the rotor 2 downward by a distance of less than 30 mm. During the downward movement, continuously check the distance measured by the laser rangefinder 15 to ensure that the rotor 2 moves downward by a distance of less than 30 mm. Use a caliper to check whether the gap between the stator 1 and the rotor 2 is uniform. If it is not uniform, use the hand winch 11 to level the rotor 2.

[0052] (5) Repeat the operations from step (3) to step (4) until the stator 1 and the rotor 2 are in place, then remove the wire rope 10, the hand hoist 11, and the extension coupling 5, and connect the other connections.

[0053] The difference between this embodiment and embodiment 2 is that embodiment 1 is the disassembly of the rotor 2, and the steps of embodiment 1 are as follows: Figure 1 , Figure 5 , Figure 6 , Figure 7 The operation is performed in the order of Figure 7 , Figure 6 , Figure 5 , Figure 1 The operations are performed in the order of .

[0054] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0055] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. An assembly device for the rotor of a main motor of a rolling mill, comprising a stator, a rotor and a crane, wherein the rotor is installed in the stator, the non-load end of the rotor is installed on the bearing seat, the load end of the rotor is installed with a half coupling, and the crane is located above the bearing seat, characterized in that: An extended coupling is bolted to the half coupling, a horizontal sling is hung on the crane through a steel wire rope, a number of stops, side stops and lifting shafts are welded on the horizontal sling, the horizontal sling is hung on both ends of the rotor through a steel wire rope passing through the stop and a hand winch, a support frame is placed on the ground outside the bearing seat, support blocks are inserted at both ends of the support frame, a jack is installed at the bottom of the stator, and a laser rangefinder and a spirit level are installed on the stator.

2. The assembly device for the rotor of the main motor of a rolling mill according to claim 1, characterized in that: There are three stops, and the welding positions of the stops are located on the central axis of the top surface of the horizontal hanger. The distance between two adjacent stops is greater than the width of the stator. There are four lifting axes, and the four lifting axes are symmetrically welded on both sides of the horizontal hanger in pairs. There are two side stops, and the side stops are located at both ends of the top surface of the horizontal hanger and on the outside of the stops.

3. The assembly device for the rotor of the main motor of a rolling mill according to claim 2, characterized in that: The stopper is in the shape of a gate, with the open end of the gate-shaped stopper facing the horizontal spreader, the steel wire rope passes through the gate-shaped inner cavity of the stopper, the cross-section of the lifting shaft is T-shaped and the longitudinal section is circular, the crane is hung on the lifting shaft of the horizontal spreader through the steel wire rope, the side guard is in the shape of a straight plate, the side guard is welded to the horizontal spreader at an angle, and the inclination directions of the two side guards are both toward the middle of the horizontal spreader.

4. The assembly device for the rotor of the main motor of a rolling mill according to claim 1, characterized in that: The extended coupling is tubular, one end of which is provided with a flange, the extended coupling is bolted to the rotor shaft end through the flange, and two lifting ears are welded on the side of the extended coupling.

5. The assembly device for the rotor of the main motor of a rolling mill according to claim 1, characterized in that: Boxes are welded at both ends of the support frame, support blocks are placed in the box, and two lifting shafts are welded on both sides of the support frame. The cross section of the lifting shaft is T-shaped and the longitudinal section is circular.

6. The assembly device for the rotor of the main motor of a rolling mill according to claim 5, characterized in that: The support block is a sleeper, the upper part of the box is open, and arc-shaped notches are provided on the box and the support block. The diameter of the notch on the support block is the diameter of the rotor shaft end, and the height of the notch on the support block is higher than the height of the notch on the box.

7. The assembly device for the rotor of the main motor of a rolling mill according to claim 1, characterized in that: The jack is a one-to-four synchronous jack, and the four lifting ends of the jack are symmetrically located at the four corners below the stator.

8. The assembly device for the rotor of the main motor of a rolling mill according to claim 1, characterized in that: The laser rangefinder is located in the middle of the top surface of the stator and the measuring end of the laser rangefinder faces the horizontal hanger. There are four levels, which are respectively pasted on the four side surfaces of the bottom of the stator.

Images