Method for installing and adjusting main motor of wide and thick plate rolling mill and flat base plate structure thereof

Abstract

The invention relates to a wide and thick plate mill main motor mounting and adjusting method and a flat base plate structure thereof. The method comprises the steps of 1, construction preparation; after closed construction of a main motor room travelling crane, a main motor foundation and a plant is completed, foundation acceptance before equipment installation is conducted, and a center target plate and a datum point are buried; 2, setting a horizontal base plate; 3, mounting and adjusting a motor bottom plate; 4, mounting and adjusting the bearing seat; 5, mounting and adjusting the stator; sixthly, a rotor is installed and adjusted; and 7, mounting the motor cover and the cooler. The method has the characteristics of improving the mounting precision, reducing the mounting difficulty, shortening the mounting period, improving the equipment performance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment construction, and in particular to a method for installing and adjusting a main motor of a wide and thick plate rolling mill and a flat pad structure thereof. Background Art

[0002] The wide and thick plate rolling mill is an important equipment in steel production. The installation accuracy of its main motor directly affects the operating performance and product quality of the rolling mill. At present, in the installation process of the main motor of the wide and thick plate rolling mill, there are usually problems such as difficult to ensure installation accuracy, complicated adjustment process, and long time consumption. Therefore, an efficient and accurate installation and adjustment method for the main motor of the wide and thick plate rolling mill is needed. Ensure that large main motors can be installed quickly and safely. By optimizing the installation and adjustment process, ensure that the parameters such as the horizontality, elevation and center position of the motor after installation meet the design requirements, reduce the vibration and noise during motor operation, and improve the stability and reliability of the equipment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for installing and adjusting the main motor of a wide and thick plate rolling mill and a flat pad structure thereof, which has the characteristics of improving installation accuracy, reducing installation difficulty, shortening installation period, and improving equipment performance.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a method for installing and adjusting the main motor of a wide and thick plate rolling mill, comprising the following specific steps:

[0005] Step 1: Construction preparation: After the main motor room crane, main motor foundation, and plant enclosure construction are completed, the foundation acceptance before equipment installation is carried out and the center mark plate and reference point are buried;

[0006] Step 2: Setting of horizontal pads; Set the horizontal pads according to the pad layout diagram, insert the lower end of the adjusting screw rod vertically into the end face of the foundation, connect the upper end of the adjusting screw rod with the adjusting workpiece on the horizontal pad, so that the height and levelness of the horizontal pad can be adjusted at will, adjust the horizontal pad to the set elevation, ensure the levelness, configure the template with sheet material at the position of the horizontal pad, and after completing the installation of all templates, perform grouting and curing operations;

[0007] Step 3: Installation and adjustment of the motor base plate; the motor base plate is a combination, divided into four parts, with a positioning pin in the middle. First, install the motor base plate on the foundation, tighten the connecting bolts, install several groups of inclined shims on the horizontal pad, and adjust the elevation, center line and horizontality of the motor base plate through the inclined shims;

[0008] Step 4: Installation and adjustment of the bearing seat; after the motor base plate is installed, remove the upper cover of the bearing seat and the thrust bearing, clean the bearing bearing, and wipe it with a white cloth. Use sandpaper and a polisher to clean the burrs and blunt edges on the bottom of the bearing seat, install insulating gaskets and adjustment gaskets, center the bearing seat according to the positioning pin holes, measure the elevation with a level, and measure the horizontality with a frame level to make it meet the design requirements, install the lower half of the bearing bearing into the bearing seat, and apply a small amount of lubricating oil on the contact surface before installation; after the rotor is in place, install the upper cover of the bearing seat;

[0009] Step 5: Installation and adjustment of the stator: After the bearing seat is installed and the center line and elevation are adjusted to meet the requirements, the stator will be hoisted into place, and a high-precision level will be placed at the four corners of the stator. The reading of the level will be observed to determine the horizontal state of the stator.

[0010] Step 6: Installation and adjustment of the rotor: After the stator is installed, install the rotor. The rotor is put into place by threading the core on site. The rotor is installed on the two bearing seats. A high-precision level is placed on the rotor journal and other parts. The bubbles on the level are observed to determine the horizontal deviation of the rotor. After the adjustment is completed, the bearing seat lead pressure test is carried out. If it passes the test, the upper cover of the bearing seat is closed.

[0011] Step 7: Install the motor cover and cooler; After the stator and rotor are adjusted, install the motor cover and fix it to the motor body with bolts or screws. Pay attention to tightening evenly to avoid skewness or looseness. Check the sealing between the motor cover and the motor body. If necessary, use sealant or sealing strips to seal to prevent dust, water vapor, etc. from entering the motor.

[0012] Place the cooler at the predetermined installation position and fix it with a bracket. The bracket must be installed firmly and reliably, able to withstand the weight of the cooler and the vibration during operation. Connect the cooling water pipeline according to the inlet and outlet positions of the cooler. When connecting the pipeline, ensure that the pipeline is well sealed to avoid water leakage.

[0013] In step 2, the lower end of the adjusting screw rod can be fixed in the foundation end surface by welding with the foundation steel bar.

[0014] As a supplement to the present technical solution, in step five, if the level does not meet the requirements, use a jack to make fine adjustments at the corresponding position, gradually raise or lower the jack, and observe the changes in the level readings. Further accurately adjust the level by adding or reducing shims, and adjust and check repeatedly until the level error of the stator is controlled within the design range. Center position adjustment: Horizontal adjustment: Use a jack to push the stator to move it in the horizontal direction, gradually approaching the center position, vertical adjustment: By adjusting the thickness of the shim at the bottom of the stator, the vertical height of the stator is changed, thereby adjusting the center position, and constantly measuring and adjusting until the deviation between the center position of the stator and the center position required by the design is within the allowable range.

[0015] As a supplement to the present technical solution, in step six, if one end is too high, place a jack under the bearing seat at that end, lift the rotor, add or reduce gaskets at the jack position to adjust the height, repeatedly measure and adjust until the level meets the requirements, air gap adjustment: if the axial air gap is uneven, it can be achieved by adjusting the position of the bearing seat, lift the rotor with a jack, add or reduce gaskets between the bearing seat and the motor base to change the axial position, when the radial air gap is uneven, loosen the stator fixing bolts and use the jack to gently move the stator to make the radial gap between the stator and the rotor tend to be uniform.

[0016] As a supplement to the present technical solution, a flat pad structure for a method for installing and adjusting a main motor of a wide and thick plate rolling mill includes a base end face, a recess and an adjusting screw, a plurality of base steel bars are arranged transversely in the base end face, a recess is provided on the base end face, a grouting material is provided on the recess, a horizontal pad is embedded in the grouting material, a horizontal pad is provided on the front and rear sides of the left end and the right end of the horizontal pad, an adjusting workpiece extending horizontally is provided on the adjusting workpiece, an adjusting screw is installed on the adjusting workpiece, an adjusting nut is installed on the upper end of the adjusting screw and the upper and lower side surfaces of the adjusting workpiece, and the lower end of the adjusting screw is vertically inserted into the base end face and welded to the base steel bar.

[0017] Beneficial effects: The present invention relates to a method for installing and adjusting a main motor of a wide and thick plate rolling mill and a flat pad structure thereof, which has the following advantages:

[0018] (1) Improve installation accuracy: Use precision measuring instruments and special tools to accurately adjust various parameters of the motor, ensure high installation accuracy, effectively reduce vibration and noise during motor operation, and improve the stability and reliability of the equipment;

[0019] (2) Reduce installation difficulty: Reasonable installation steps and methods make the lifting and positioning of large main motors easier.

[0020] Reduces human errors during installation and improves installation efficiency;

[0021] (3) Shorten the installation cycle: The precise installation adjustment method reduces the time for repeated adjustment and measurement, greatly shortening the installation cycle;

[0022] (4) Improve equipment performance: Improved installation accuracy and enhanced operating stability help improve the production efficiency and product quality of wide and thick plate rolling mills, extend the service life of motors, and reduce equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural view of the flat pad of the present invention;

[0024] Figure 2 is a top view of the flat pad of the present invention;

[0025] Figure 3 It is the installation drawing of the motor base plate and the bearing seat of the present invention;

[0026] Figure 4 It is a schematic diagram of stator assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the rotor assembly of the present invention;

[0028] Figure 6 It is a front view of the present invention after assembly;

[0029] Figure 7 It is a side view of the present invention after assembly. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0031] The embodiment of the present invention relates to a method for installing and adjusting the main motor of a wide and thick plate rolling mill and a flat pad structure thereof, such as Figure 1 —7, including the following specific steps:

[0032] Step 1: Construction preparation: After the main motor room crane, main motor foundation, and plant enclosure construction are completed, the foundation acceptance before equipment installation is carried out and the center mark plate and reference point are buried;

[0033] Step 2: Setting of horizontal pad 7; Set the horizontal pad 7 according to the pad layout diagram, vertically insert the lower end of the adjusting screw rod 5 into the foundation end face 1, and connect the upper end of the adjusting screw rod 5 with the adjusting workpiece 8 on the horizontal pad 7, so that the height and levelness of the horizontal pad 7 can be adjusted at will, adjust the horizontal pad 7 to the set elevation, ensure the levelness, configure the template 3 with sheet material at the position of the horizontal pad 7, and after completing the installation of all the templates 3, perform grouting and curing operations;

[0034] Step 3: Installation and adjustment of the motor base plate 10; the motor base plate 10 is a combination, divided into four parts, with a positioning pin connected in the middle. First, install the motor base plate 10 on the foundation, tighten the connecting bolts, install several groups of inclined shims 16 on the horizontal pad 7, and adjust the elevation, center line and horizontality of the motor base plate 10 through the inclined shims 16;

[0035] Step 4: Installation and adjustment of the bearing seat 11; after the motor base plate 10 is installed, the upper cover of the bearing seat and the thrust bearing are removed, the bearing bearing is cleaned and wiped with a white cloth, the burrs and blunt edges on the bottom of the bearing seat are cleaned with sandpaper and a polisher, and insulating gaskets and adjustment gaskets are installed. The bearing seat 11 is centered according to the positioning pin hole, and the elevation is measured with a level and the horizontality is measured with a frame level to meet the design requirements. The lower half of the bearing bearing is installed into the bearing seat 11, and a small amount of lubricating oil is applied to the contact surface before installation; after the rotor is in place, the upper cover of the bearing seat 11 is installed;

[0036] Step 5: Installation and adjustment of the stator 12; after the bearing seat 11 is installed and the center line and elevation level are adjusted to meet the requirements, the stator 12 will be hoisted into place, and a high-precision level will be placed at the four corners of the stator 12 to observe the reading of the level to determine the horizontal state of the stator 12;

[0037] Step 6: Installation and adjustment of the rotor 13; after the stator 12 is installed, the rotor 13 is installed. The rotor 13 is put into place by means of on-site core penetration. The rotor 13 is installed on the two bearing seats. A high-precision level is placed on the rotor journal and other parts. The bubbles on the level are observed to determine the deviation of the rotor level. After the adjustment is completed, the bearing seat lead pressure test is carried out. If it is qualified, the upper cover of the bearing seat 11 is closed;

[0038] Step 7: Install the motor cover 14 and the cooler 15; After the stator 12 and the rotor 13 are adjusted, install the motor cover 14 and fix the motor cover 14 to the motor body with bolts or screws. Pay attention to tightening the force evenly to avoid skewness or looseness. Check the sealing between the motor cover 14 and the motor body. If necessary, use sealant or sealing strips for sealing to prevent dust, water vapor, etc. from entering the motor.

[0039] Place the cooler 15 at the predetermined installation position and fix it with a bracket. The bracket must be installed firmly and reliably to withstand the weight of the cooler and the vibration during operation. Connect the cooling water pipeline according to the inlet and outlet positions of the cooler 15. When connecting the pipeline, ensure that the pipeline is well sealed to avoid water leakage.

[0040] In step 2, the lower end of the adjusting screw rod 5 can be fixed in the foundation end surface 1 by welding with the foundation steel bar.

[0041] As a supplement to the present technical solution, in step five, if the level does not meet the requirements, use a jack to make fine adjustments at the corresponding position, gradually raise or lower the jack, and observe the changes in the level readings. The level is further accurately adjusted by adding or reducing shims, and the adjustment and inspection are repeated until the level error of the stator 12 is controlled within the design range. Center position adjustment: Horizontal adjustment: Use a jack to push the stator 12 to move it in the horizontal direction, gradually approaching the center position, vertical adjustment: By adjusting the thickness of the shim at the bottom of the stator 12, the vertical height of the stator is changed, thereby adjusting the center position, and continuous measurement and adjustment are performed until the deviation between the center position of the stator 12 and the center position required by the design is within the allowable range.

[0042] As a supplement to the present technical solution, in step six, if one end is too high, place a jack under the bearing seat at that end, lift up the rotor 13, add or reduce gaskets at the jack position to adjust the height, repeatedly measure and adjust until the level meets the requirements, air gap adjustment: if the axial air gap is uneven, it can be achieved by adjusting the position of the bearing seat, lift up the rotor with a jack, add or reduce gaskets between the bearing seat and the motor base to change the axial position, and when the radial air gap is uneven, loosen the stator 12 fixing bolts and use the jack to gently move the stator so that the radial gap between the stator 12 and the rotor 13 tends to be uniform.

[0043] As a supplement to the present technical solution, a flat pad structure of a method for installing and adjusting the main motor of a wide and thick plate rolling mill is provided, comprising a base end face 1, an inner recess 2 and an adjusting screw 5, wherein a plurality of foundation steel bars 4 are arranged transversely in the base end face 1, an inner recess 2 is provided on the base end face 1, a grouting material 6 is provided on the inner recess 2, a horizontal pad 7 is embedded in the grouting material 6, a horizontal pad 7 is provided on the front and rear sides of the left end and the right end of the horizontal pad 7, an adjusting processing piece 8 extending horizontally is provided on the adjusting processing piece 8, an adjusting screw 5 is installed on the adjusting processing piece 8, an adjusting nut 9 is installed on the upper end of the adjusting screw 5 and the upper and lower side surfaces of the adjusting processing piece 8, and the lower end of the adjusting screw 5 is vertically inserted into the base end face 1 and welded to the foundation steel bar 4.

[0044] Example

[0045] When the flat pad structure is set up, first set the upper concave 2 on the foundation end face 1, and then perform a punching operation so that the adjusting screw rod 5 can extend into the foundation end face 1, and the lower end of the adjusting screw rod 5 is welded to the foundation steel bar 4, and at the same time, ensure that the adjusting screw rod 5 is in a vertical state. Three adjusting screw rods 5 form a group. After completion, the adjusting nut 9 is installed on the upper end of the adjusting screw rod 5, and then a horizontal pad 7 is installed on the adjusting screw rod 5 of each group. The horizontal pad 7 has three adjusting processed parts 8. The three horizontal pads 7 are sleeved on the adjusting screw rod 5. Then, the horizontal pad 7 is adjusted horizontally. The height of the adjusting nut 9 on the lower side can be ensured to be in a horizontal state. When the horizontal pad 7 is adjusted, a second adjusting nut 9 is installed on the adjusting screw rod 5 again. The adjusting nut 9 is used to complete the locking. After completion, a rectangular template 3 is set up on the concave 2, and the template 3 is filled with grouting material 6, and then cured. After the curing is completed, the template 3 is removed.

[0046] The above is a detailed introduction to a method for installing and adjusting the main motor of a wide and thick plate rolling mill and its flat pad structure provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for installing and adjusting the main motor of a wide and thick plate rolling mill, characterized in that: The specific steps include: Step 1: Construction preparation; After the main motor room crane, main motor foundation, and plant enclosure construction are completed, the foundation acceptance before equipment installation is carried out and the center mark plate and reference point are buried; Step 2: Setting of the horizontal pad (7); The horizontal pad (7) is arranged according to the pad arrangement diagram, the lower end of the adjusting screw rod (5) is vertically inserted into the foundation end surface (1), the upper end of the adjusting screw rod (5) is connected to the adjusting processing piece (8) on the horizontal pad (7), so that the height and levelness of the horizontal pad (7) can be adjusted at will, the horizontal pad (7) is adjusted to the set elevation, the levelness is ensured, the template (3) is configured with a sheet material at the position of the horizontal pad (7), and after all the templates (3) are installed, grouting and curing operations are performed; Step 3: Installation and adjustment of the motor base plate (10); The motor base plate (10) is a combined body, which is divided into four parts, and a positioning pin is connected in the middle. The motor base plate (10) is first installed on the foundation, and the connecting bolts are tightened. A plurality of groups of inclined washers (16) are installed on the horizontal pad (7), and the elevation and horizontality of the motor base plate (10) are adjusted by the inclined washers (16); Step 4: Installation and adjustment of the bearing seat (11); After the motor base plate (10) is installed, the upper cover of the bearing seat and the thrust bearing are removed, the bearing bearing is cleaned and wiped with a white cloth, the burrs and blunt edges on the bottom surface of the bearing seat are cleaned with sandpaper and a polishing machine, the insulating gasket and the adjusting gasket are installed, the bearing seat (11) is centered according to the positioning pin hole, the elevation is measured with a level, and the horizontality is measured with a frame level to meet the design requirements, the lower half of the bearing bearing is installed into the bearing seat (11), and a small amount of lubricating oil is applied to the contact surface before installation; after the rotor is in place, the upper cover of the bearing seat (11) is installed; Step 5: Installation and adjustment of the stator (12); After the bearing seat (11) is installed and the center line and elevation are adjusted to the required level, the stator (12) is hoisted and installed in place. A high-precision level is placed at the four corners of the stator (12). The reading of the level is observed to determine the horizontal state of the stator (12). Step 6: Installation and adjustment of the rotor (13); After the stator (12) is installed, the rotor (13) is installed. The rotor (13) is put into place by means of on-site core penetration. The rotor (13) is installed on two bearing seats. A high-precision level is placed on the rotor journal and other parts. The bubbles on the level are observed to determine the deviation of the rotor level. After the adjustment is completed, the bearing seat lead pressure test is carried out. After passing the test, the upper cover of the bearing seat (11) is closed. Step 7: Installation of the motor cover (14) and the cooler (15); After the stator (12) and the rotor (13) are adjusted, the motor cover (14) is installed. The motor cover (14) is fixed to the motor body with bolts or screws. Note that the tightening force should be uniform to avoid skewing or loosening. Check the sealing between the motor cover (14) and the motor body. If necessary, sealant or sealing strips can be used for sealing to prevent dust, water vapor, etc. from entering the motor. The cooler (15) is placed at a predetermined installation position and fixed with a bracket. The bracket should be installed firmly and reliably to withstand the weight of the cooler and the vibration during operation. The cooling water pipeline is connected according to the inlet and outlet positions of the cooler (15). When connecting the pipeline, ensure that the pipeline is well sealed to avoid water leakage.

2. A method for installing and adjusting the main motor of a wide and thick plate rolling mill and a flat pad structure thereof according to claim 1, characterized in that: In step 2, the lower end of the adjusting screw rod (5) can be fixed in the foundation end surface (1) by welding with the foundation steel bar.

3. A method for installing and adjusting the main motor of a wide and thick plate rolling mill according to claim 1, characterized in that: In step 5, if the level does not meet the requirements, use a jack to make fine adjustments at the corresponding position, gradually raise or lower the jack, and observe the changes in the level reading. The level is further accurately adjusted by adding or reducing shims. Repeated adjustments and inspections are performed until the level error of the stator (12) is controlled within the design range. Center position adjustment: Horizontal adjustment: Use a jack to push the stator (12) to move it in the horizontal direction and gradually approach the center position. Vertical adjustment: By adjusting the thickness of the shim at the bottom of the stator (12), the vertical height of the stator is changed, thereby adjusting the center position. Continuously measure and adjust until the deviation between the center position of the stator (12) and the center position required by the design is within the allowable range.

4. A method for installing and adjusting the main motor of a wide and thick plate rolling mill according to claim 1, characterized in that: In step 6, if one end is too high, place a jack under the bearing seat at that end, lift up the rotor (13), add or reduce shims at the jack position to adjust the height, and repeatedly measure and adjust until the levelness meets the requirements. Air gap adjustment: If the axial air gap is uneven, adjust the position of the bearing seat to achieve it. Use a jack to lift up the rotor, add or reduce shims between the bearing seat and the motor base to change the axial position. If the radial air gap is uneven, loosen the stator (12) fixing bolts and use a jack to gently move the stator to make the radial gap between the stator (12) and the rotor (13) uniform.

5. A flat pad structure for a method for installing and adjusting a main motor of a wide and thick plate rolling mill as claimed in claim 1, characterized in that: The invention comprises a base end face (1), an inner recess (2) and an adjusting screw rod (5), wherein a plurality of base steel bars (4) are arranged transversely in the base end face (1), an inner recess (2) is arranged on the base end face (1), a grouting material (6) is arranged on the inner recess (2), a horizontal pad (7) is embedded in the grouting material (6), a horizontally extending adjusting processing piece (8) is arranged on the front and rear sides of the left end and the right end of the horizontal pad (7), an adjusting screw rod (5) is installed on the adjusting processing piece (8), an adjusting nut (9) is installed on the upper end of the adjusting screw rod (5) and the upper and lower side surfaces of the adjusting processing piece (8), and the lower end of the adjusting screw rod (5) is vertically inserted into the base end face (1) and welded to the base steel bar (4).

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