Field alignment and detection tool for split rotor of large powder concentrator

Abstract

The utility model provides an on-site alignment and detection tool for a split rotor of a large powder concentrator, which is low in cost and convenient to use, and can be used for welding deformation control and run-out detection. The rotor comprises a left rotor part, a middle rotor part and a right rotor part which are in butt joint in the circumferential direction and is provided with a plurality of flanges, and the tool comprises a clamp, a screw rod, a rotatable support, a focusing plate and a laser range finder. The clamp comprises an inner clamp body and an outer clamp body which are similar in structure, the inner clamp body is provided with a clamping plate and at least two clamping plates fixed to the same side of the clamping plate, and notches are formed in the clamping plates. The focusing plate comprises an arc-shaped flitch plate and a plane flitch plate which are integrated. The arc-shaped flitch plate is provided with a horizontal line and a center line which are vertically intersected. The rotatable support comprises a base, a sleeve seat in threaded connection with the base, and a rotating disc fixed with a pivot; the laser range finder is arranged on the rotating disc; a positioning hole rotationally matched with the pivot is formed in the top of the sleeve seat; the pivot, the rotating disc, the center ring and the rotor are coaxial.

Description

Technical Field

[0001] The utility model relates to the technical field of powder classifiers, in particular to a positioning detection tool for on-site alignment of a split rotor of a large powder classifier and its supporting use. Background Art

[0002] With technological advancements and industrial development, industrial manufacturing is trending toward larger scale, and large-scale vertical mill separators are becoming increasingly predominant. The rotor speed of a vertical mill separator is directly related to its output and product fineness. To improve separator performance, a new, efficient, large-diameter rotor must be designed. However, the extra width and height of large-diameter rotors increase transportation costs and time, leading to the development of split rotors. The most critical technology for separator rotors is rotor balance. Therefore, after production and inspection, rotors are split and shipped. Rotors that have been re-welded on-site require further inspection.

[0003] Due to differences in mass, rotational speed, and gyration radius, the final imbalance of a powder separator rotor cannot and does not need to be zero. Therefore, a certain residual amount is allowed. As long as it does not exceed the maximum mass of the balancing weights, the rotor is considered qualified. Currently, there is no dedicated dynamic balancing equipment for balancing large rigid rotors. On-site balance cannot be guaranteed, unlike with smaller diameter rotors, through machining or dynamic balancing verification. Static balancing is the only option. Static balancing generally relies on repeatedly rotating the rotor to roughly identify the point of maximum imbalance. The technician then adds and removes balancing weights based on their experience, searching for the next imbalance point until the rotor can be stopped at any point and no longer rotated. This method is cumbersome, time-consuming, and labor-intensive. Furthermore, it is inadequate for larger rotors due to the size of the static balancing bracket and the weight of the rotor. Therefore, on-site shaping is required to achieve the balance that was adjusted before the rotor was disassembled. Reducing the tedious process and time consumption is of paramount importance.

[0004] As an important component of the powder classifier, the powder classifier rotor consists of a rotor cage and rotor blades. The rotor blades can be weighed and numbered in order of installation position. The numbering should comply with the principle of balance with the center of mass centered, that is, after the rotor is installed, the difference in the total mass of the blades on both sides of any cutting plane along the rotor axis meets the design deviation requirements.

[0005] Therefore, when large-diameter split rotors are re-welded on site, it is particularly important to reduce costs, optimize the manufacturing process, control welding deformation, and perform vibration detection. Utility Model Content

[0006] The utility model provides an on-site alignment and detection tool for a split rotor of a large powder classifier, which has low cost and is easy to use and can simultaneously meet the requirements of welding deformation control and runout detection during the forming and manufacturing process.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A tool for on-site alignment and testing of a split rotor for a large powder concentrator. The rotor comprises three circumferentially opposed parts: a left rotor, a middle rotor, and a right rotor. Each part comprises flanges spaced axially and blade supports spaced circumferentially. The tool comprises a fixture, a screw, a rotatable support, a focusing plate, and a laser rangefinder.

[0009] The fixture includes an inner fixture and an outer fixture of similar structure. The inner fixture has a clamping plate and at least two clamping plates fixed on the same side of the clamping plate and spaced apart in the circumferential direction of the rotor. The clamping plates have slots with a width equal to the thickness of the flanges. The flanges at the joints between the right rotor and the middle rotor, and the flanges at the joints between the left rotor and the middle rotor, both extend into the slots of the clamping plates on the inner fixture and the outer fixture. The screw passes through the clamping plates of the inner fixture and the outer fixture. The clamp, screw, and nut are used to clamp the joints between the left rotor and the middle rotor, and the joints between the right rotor and the middle rotor.

[0010] The focusing plate includes an arc-shaped plate and a flat plate fixed together. The arc-shaped plate is used to fit with the outer or inner periphery of the rotor, and the flat plate is used to fit with the flange end face. The arc-shaped plate has a horizontal line and a center line that intersect vertically.

[0011] The rotatable support includes a base that is detachably connected to the center ring of the rotor, a sleeve seat that is threadedly connected to the upper end of the base, and a rotating disk with a pivot fixed thereon; the laser rangefinder is arranged on the rotating disk; the top of the sleeve seat has a positioning hole for cooperating with the pivot; the pivot, rotating disk, center ring, and rotor are coaxial.

[0012] The above-mentioned on-site alignment and detection tooling has a notch on the flat plate into which the blade bracket can extend.

[0013] In the above-mentioned on-site alignment and detection tooling, a set screw is provided on the side wall of the casing seat. When the set screw is tightened, the casing seat cannot rotate relative to the base.

[0014] The above-mentioned on-site alignment and detection tooling is provided with a fixing block on the rotating disk for fixing the laser rangefinder.

[0015] The above-mentioned on-site alignment and detection tooling has a bearing set in the positioning hole.

[0016] The above-mentioned on-site alignment and detection tooling has a transition flange at the bottom of the base that matches the center hole.

[0017] Beneficial effects of the utility model:

[0018] The steps for on-site assembly and testing of the rotor using this tool are as follows:

[0019] 1. Material preparation: rotor center, rotor left, rotor right;

[0020] 2. Build a working platform and level it to measure the level of the table;

[0021] 3. Install the tooling: Install the rotatable support onto the rotor. Specifically, the base is detachably connected to the center ring, the upper end of the base is connected to the sleeve seat via threads, the pivot of the rotating disk rotates with the positioning hole on the top of the sleeve seat, and the laser rangefinder is set on the rotating disk; the pivot, rotating disk, center ring, and rotor are coaxial. Fit the flat plate of the focusing plate to the upper flange at the top of the rotor, and fit the arc-shaped plate to the outer or inner circumference of the rotor. Align the laser rangefinder with the center line of the focusing plate, and then fix the height of the sleeve seat in the axial direction of the rotor relative to the base, or adjust the position of the horizontal line and the center line on the focusing plate with the point of the laser rangefinder as the center;

[0022] 4. Fix the left rotor: Install the fixture, preliminarily connect the left rotor with the center rotor, place the focusing plate at different positions on the upper flange at the upper end of the left rotor, with the flat plate of the focusing plate fitting against the upper flange of the left rotor, and the curved plate fitting against the outer or inner circumference of the left rotor. Rotate the rotating disk relative to the sleeve seat, measure the axial and radial runout of the upper flange of the left rotor at multiple points using a laser rangefinder, and adjust the fastening screws on the fixture to make adjustments so that the axial and radial runout meet the requirements.

[0023] 5. Rotor right fixed: same as rotor left fixed;

[0024] 6. Rotor Leveling: During the entire rotor welding process, a tool installed on the rotor continuously monitors and corrects the concentricity and flatness of the upper flange at the top of the rotor, allowing for timely adjustment and control of welding distortion. After welding, the tool can also be used to verify the geometric and positional tolerances required by the design drawings, including radial runout and axial runout.

[0025] Radial runout and axial runout detection are as follows:

[0026] 1. When measuring the radial runout of the rotor flange, place the focusing plate on the upper flange, align the laser distance meter with the center line of the focusing plate, and note the distance value a displayed by the laser distance meter. The difference between different distance values a is the radial runout.

[0027] 2. When measuring the axial runout of the rotor flange, place the focusing plate on the upper flange and align the laser rangefinder with the center line of the focusing plate. The distance between the laser point and the horizontal line is the axial runout.

[0028] The base and sleeve seat are connected by a threaded connection, allowing the sleeve seat, swivel seat, and laser rangefinder to be adjusted in height, and secured with setscrews. Furthermore, a transition flange is added to the bottom of the support to accommodate mounting holes for rotors of varying sizes.

[0029] The above improvements can realize the vibration detection of split rotors of powder concentrators with different diameters and specifications, have strong applicability, and greatly save costs.

[0030] This utility model provides an auxiliary means for ensuring minimal additional balancing weight before static balancing of the split rotor structure of a large powder separator. During the rotor forming and welding process, positioning detection tooling can be used to monitor changes in the rotor's radial and axial runout values, allowing timely measures to control dimensional and form tolerances to achieve rotor balance. This also provides a solution for avoiding eccentric loads generated during rotor operation when static balancing is not possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a perspective view of the rotor (unassembled);

[0032] Figure 2 is a top view of the rotor (unassembled);

[0033] Figure 3 This is the requirement diagram of the radial and axial runout of the rotor (after assembly);

[0034] Figure 4 This is a three-dimensional diagram of the rotor with this tool installed;

[0035] Figure 5 This is the main view of the rotor with this tool installed;

[0036] Figure 6 yes Figure 5 A partial enlarged view of the

[0037] Figure 7 It is a stereogram of the focusing plate;

[0038] Figure 8 This is a top view of the focusing plate;

[0039] Figure 9 This is the main view of the fixture and screw;

[0040] Figure 10 yes Figure 9 A top view of

[0041] Figure 11 yes Figure 10 A side view of the inner fixture in FIG.

[0042] Figure 12It is the main view of the rotating disk, laser rangefinder, etc.;

[0043] Figure 13 yes Figure 12 A top view of

[0044] Figure 14 This is the main view of the casing seat.

[0045] In the figure, the rotor 100, the left rotor 101, the middle rotor 102, the right rotor 103, the flange 105, the blade support 106, the center ring 107,

[0046] Clamp 1, inner clamp 11, outer clamp 12, clamping plate 15, clamping plate 16, notch 17, screw 2, rotatable support 3, base 31, transition flange 311, sleeve seat 32, positioning hole 321, bearing 322, pivot 33, rotating disk 34, fixing block 341, set screw 35

[0047] Focusing plate 4, arc-shaped plate 41, plane plate 42, horizontal line 43, center line 44; notch 45,

[0048] Laser rangefinder 5. DETAILED DESCRIPTION

[0049] A tool for on-site alignment and inspection of a split rotor for a large powder concentrator. The rotor 100 comprises three circumferentially connected parts: a left rotor 101, a middle rotor 102, and a right rotor 103. Each part includes axially spaced flanges 105 and circumferentially spaced blade supports 106. A center ring 107 is fixed to the middle rotor 102.

[0050] The on-site alignment and detection tooling includes a fixture 1 , a screw 2 , a rotatable support 3 , a focusing plate 4 , and a laser rangefinder 5 .

[0051] The fixture 1 comprises an inner fixture 11 and an outer fixture 12 of similar structure. The inner fixture comprises a clamping plate 15 and at least two clamping plates 16 fixed on the same side of the clamping plate and spaced apart in the circumferential direction of the rotor. The clamping plates are provided with slots 17 having the same width as the flange thickness.

[0052] The flanges at the joints between the right rotor and the middle rotor, and the flanges at the joints between the left rotor and the middle rotor both extend into the slots 17 of the clamping plates on the inner and outer clamps, and the screw 2 passes through the clamping plates of the inner and outer clamps. The joints between the left rotor and the middle rotor, and the joints between the right rotor and the middle rotor are clamped using the clamps, screws, and nuts.

[0053] The focusing plate 4 includes an arc-shaped plate 41 and a plane plate 42 fixed together. The arc-shaped plate is used to fit with the outer periphery of the rotor, and the inner side of the arc-shaped plate is engraved with vertically intersecting horizontal lines 43 and a center line 44; the plane plate is used to fit with the flange end face, and a notch 45 is opened on the plane plate for the blade bracket to extend into.

[0054] The rotatable support 3 comprises a base 31 detachably connected to the center ring via bolts, a sleeve seat 32 threadedly connected to the upper end of the base, and a rotating disk 34 secured with a pivot 33. A fixing block 341 is provided on the rotating disk 34 for securing the laser rangefinder 5. A transition flange 311 is provided at the bottom of the base to mate with the center hole.

[0055] The top of the sleeve seat 32 has a positioning hole 321, which contains a bearing 322 for rotatable engagement with the pivot 33. A set screw 35 is provided on the side wall of the sleeve seat. When tightened, the sleeve seat cannot rotate relative to the base. The pivot, rotating disk, center ring, and rotor are coaxial.

[0056] The rotor cage structure of the large powder classifier described in the present invention includes three parts: the left, middle and right parts of the rotor; the alignment tool includes: a clamp and a screw; the inspection tool includes: a rotatable support, a focusing plate and a laser rangefinder. With the middle rotor as the reference, the rotatable support is installed, and the laser rangefinder is installed on the rotatable support (the laser rangefinder is fixed by a horizontal line), the focusing plate is placed at the center of the left or right side of the rotor, and the alignment tool is fixed at the split point according to the value on the laser rangefinder, and then the focusing plate is moved to measure and adjust the alignment tool at multiple positions, and then welding is performed, and the same steps are performed on the other end. After the overall assembly welding is completed, the focusing plate is moved to perform multi-point measurement. The difference is the dimensional change, which can be used to measure the rotor's form and position tolerances such as runout and flatness.

[0057] This utility model provides an auxiliary means for ensuring minimal additional balancing weight before static balancing of the split rotor structure of a large powder separator. During the rotor forming and welding process, positioning detection tooling can be used to monitor changes in the rotor's radial and axial runout values, allowing timely measures to control dimensional and form tolerances to achieve rotor balance. This also provides a solution for avoiding eccentric loads generated during rotor operation when static balancing is not possible.

Claims

1. A tool for on-site alignment and inspection of a split rotor for a large powder concentrator, wherein the rotor comprises three circumferentially opposed sections: a left rotor, a middle rotor, and a right rotor, each section comprising axially spaced flanges and circumferentially spaced blade supports; wherein: The on-site alignment and detection tooling includes a fixture, a screw, a rotatable support, a focusing plate, and a laser rangefinder; The fixture includes an inner fixture and an outer fixture of similar structure. The inner fixture has a clamping plate and at least two clamping plates fixed on the same side of the clamping plate and spaced apart in the circumferential direction of the rotor. The clamping plates have slots with a width equal to the thickness of the flanges. The flanges at the joints between the right rotor and the middle rotor, and the flanges at the joints between the left rotor and the middle rotor, both extend into the slots of the clamping plates on the inner fixture and the outer fixture. The screw passes through the clamping plates of the inner fixture and the outer fixture. The clamp, screw, and nut are used to clamp the joints between the left rotor and the middle rotor, and the joints between the right rotor and the middle rotor. The focusing plate includes an arc-shaped plate and a flat plate fixed together. The arc-shaped plate is used to fit with the outer or inner periphery of the rotor, and the flat plate is used to fit with the flange end face. The arc-shaped plate has a horizontal line and a center line that intersect vertically. The rotatable support includes a base that is detachably connected to the center ring of the rotor, a sleeve seat that is threadedly connected to the upper end of the base, and a rotating disk with a pivot fixed thereon; the laser rangefinder is arranged on the rotating disk; the top of the sleeve seat has a positioning hole for cooperating with the pivot; the pivot, rotating disk, center ring, and rotor are coaxial.

2. The on-site alignment and detection tool as claimed in claim 1, characterized in that: The flat plate is provided with a notch into which the blade bracket can extend.

3. The on-site alignment and detection tool as claimed in claim 1, characterized in that: A set screw is provided on the side wall of the sleeve seat. When the set screw is tightened, the sleeve seat cannot rotate relative to the base.

4. The on-site alignment and detection tool as claimed in claim 1, characterized in that: A fixing block for fixing the laser rangefinder is provided on the rotating disk.

5. The on-site alignment and detection tool as claimed in claim 1, characterized in that: A bearing is arranged in the positioning hole.

6. The on-site alignment and detection tool as claimed in claim 1, characterized in that: A transition flange matching the center hole is provided at the bottom of the base.

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