A manufacturing method of a large-diameter powder concentrator rotor

Abstract

The application discloses a manufacturing method of a large-diameter powder concentrator rotor, and the method comprises the following steps: first, preparing a rotor with required balance in a rotor production factory; then, fixing positioning clamps on both sides of a splitting line of the rotor; and finally, splitting the whole rotor along the splitting line to obtain a plurality of rotor blocks, which are convenient to transport, and after being transported to a site, the plurality of rotor blocks are spliced through the positioning clamps, the splitting positions are welded, the plurality of rotor blocks are welded into a whole rotor, the positioning clamps are removed, and finally, the balance of the rotor obtained at the site is consistent with that of the rotor prepared in the rotor production factory, so that the production equipment precision requirement can be met, and long-distance transportation is facilitated.

Description

Technical Field

[0001] This invention relates to the field of air classifier technology, and specifically to a method for manufacturing a large-diameter air classifier rotor. Background Technology

[0002] With the increasing size of cement plant equipment and the saturation of the domestic cement market, competition in the cement production machinery market is becoming increasingly fierce, necessitating continuous expansion into overseas markets. However, most cement production enterprises are located in remote mountainous areas with poor road conditions, making the overall transportation of large equipment difficult. Vertical mill shells and air classifier shells can be manufactured in sections, transported to the site, and then assembled and welded on-site. This method fully meets the precision requirements of the production equipment, and the sectioned construction also facilitates transportation. Furthermore, the air classifier rotor has balance requirements; stable operation of the air classifier plays a crucial role in its normal operation. Poor rotor balance can even affect the safety of the plant. Due to the large size of the rotor in the large-diameter air classifier, overall transportation is difficult. To facilitate transportation, if the rotor components, such as the rotor cone, lower flange, middle flange, upper flange, and blades, are manufactured in the rotor manufacturing plant and then transported separately to the site where the equipment is used, and then assembled and welded on-site to form the rotor, the rotor is prone to poor balance due to the lack of machining equipment and rotor size inspection fixtures on-site. This results in the rotor failing to meet the precision requirements of the production equipment. To expand into overseas markets, there is an urgent need to find a new manufacturing process for large-diameter air classifiers. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a method for manufacturing a large-diameter air classifier rotor, addressing the shortcomings of the prior art. This method involves first preparing a rotor with satisfactory balance at a rotor manufacturing plant. Then, positioning fixtures are fixed on both sides of the rotor's split line. The rotor is then split along the split line to obtain multiple rotor blocks. These blocks facilitate transportation. After arriving at the site, the multiple rotor blocks are assembled using positioning fixtures, and the split positions are welded together to form a complete rotor. The positioning fixtures are then removed, ensuring that the final rotor obtained on-site has the same balance as the rotor prepared at the rotor manufacturing plant. This method meets the precision requirements of production equipment while also facilitating long-distance transportation.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for manufacturing a large-diameter air classifier rotor includes:

[0006] Step 1, Rotor fabrication: Fabricate a rotor that meets the balance requirements;

[0007] Step 2, Rotor Splitting:

[0008] Step 2.1 Mark the split line on the rotor prepared in Step 1, fix the positioning fixture on both sides of the split line, the positioning fixture includes two fixture blocks, the two fixture blocks are fixed on both sides of the split line respectively, and the two fixture blocks are locked together by a connecting structure.

[0009] Step 2.2: Measure the rotor dimensions and determine if they meet the requirements. If not, process the rotor until the dimensions meet the requirements.

[0010] Step 2.3: Remove the connecting structure between the two clamping blocks, and split the rotor along the splitting line to obtain multiple rotor blocks;

[0011] Step 3: On-site assembly of rotor sections:

[0012] Step 3.1: Transport multiple rotor blocks to the site, splice the multiple rotor blocks, and connect the clamp blocks on both sides of the split line through the connecting structure, so that the multiple rotor block structures are merged into a whole. Then, weld the split line position of the whole, so that the rotor blocks on both sides of the split line are welded into a whole. After the welding is completed, the rotor is obtained.

[0013] Step 3.2: Remove the positioning clamps from the rotor.

[0014] As a further improvement to the present invention, step 1 specifically includes:

[0015] Step 1.1: Fabricate the rotor cone;

[0016] Step 1.2: Fabricate the upper flange, middle flange, and lower flange, and correct the flatness and roundness of the upper flange, middle flange, and lower flange respectively;

[0017] Step 1.3: Position the rotor cone on the lower flange and measure the concentricity between the rotor cone and the lower flange;

[0018] Step 1.4: Position the middle flange above the lower flange in sequence, and position the upper flange above the middle flange. The lower flange and the middle flange, as well as the middle flange and the upper flange, are supported by seamless pipes. The stiffening ribs are used to obtain the initial structure of the rotor.

[0019] Step 1.5: Measure the dimensions of the preliminary rotor structure. After the dimensions meet the requirements, spot weld the seamless tube to the lower flange, the seamless tube to the middle flange, and the seamless tube to the upper flange. After welding, measure the dimensions of the preliminary rotor structure again. After the dimensions meet the requirements, proceed to the next step.

[0020] Step 1.6: Spot weld multiple blades to the upper flange, middle flange, and lower flange of the rotor preliminary structure in the circumferential direction. Weld one end of the reinforcing rib plate to the rotor cone and the other end to the blade. Then perform dimensional inspection. After the dimensions meet the requirements, weld all the blades to the lower flange, middle flange, and upper flange. Weld the reinforcing rib plate to the rotor cone and the reinforcing rib plate to the blade to obtain the rotor.

[0021] Step 1.7: Measure the rotor dimensions and determine if they meet the requirements. If not, proceed with machining until the dimensions meet the requirements.

[0022] As a further improvement of the present invention, the dimensions in steps 1.5, 1.7, and 2.2 include diameter, flatness, and height.

[0023] As a further improved technical solution of the present invention, in step 1.4, there are multiple middle flanges, which are located between the upper flange and the lower flange, and the middle flanges are supported by seamless pipes.

[0024] As a further improvement of the present invention, the surfaces of the upper flange and the middle flange are both laser-cut with multiple uniform and spaced first positioning slots in the circumferential direction, and the surfaces of the blades are laser-cut with multiple second positioning slots for insertion into the first positioning slots.

[0025] In step 1.6, the multiple second positioning slots on each blade are respectively inserted into the first positioning slots of the upper flange and the middle flange, and then the inserted parts are spot welded; the bottom of the blade is spot welded to the lower flange; one end of the reinforcing rib is welded to the rotor cone and the other end is welded to the blade, and then the dimensions are checked. After the dimensions meet the requirements, the blades are fully welded to the lower flange, the middle flange and the upper flange. The reinforcing rib is fully welded to the rotor cone and the reinforcing rib is fully welded to the blade to obtain the rotor; then, the seamless tube on the rotor is removed.

[0026] As a further improvement of the present invention, in step 2.1, the positioning fixture includes a conical positioning fixture;

[0027] The conical positioning fixture includes a first conical fixture block and a second conical fixture block. Both the first and second conical fixture blocks are L-shaped and have connecting holes. The first conical fixture block is fixedly connected to one side of the split line on the rotor cone by welding, and the second conical fixture block is fixedly connected to the other side of the split line on the rotor cone by welding. The connecting holes on the first and second conical fixture blocks are locked together by a first connecting structure, which is a bolt.

[0028] As a further improvement of the present invention, in step 2.1, the positioning fixture further includes a flange positioning fixture;

[0029] The flange positioning fixture includes flange clamp block one and flange clamp block two. Both flange clamp block one and flange clamp block two are U-shaped. Both flange clamp block one and flange clamp block two are provided with connecting holes. Flange clamp block one is fixedly connected to one side of the dividing line on the lower flange, middle flange or upper flange by welding. Flange clamp block two is fixedly connected to the other side of the dividing line on the lower flange, middle flange or upper flange by welding. The connecting holes on flange clamp block one and flange clamp block two are locked together by a second connecting structure.

[0030] The second connection structure includes a connecting pipe and bolts. The bolts pass through the connecting holes of flange clamp block one, the connecting pipe, and the connecting holes of flange clamp block two in sequence, and then connect with the nuts to achieve the locking connection between flange clamp block one and flange clamp block two.

[0031] As a further improvement of the present invention, there are multiple cone positioning fixtures and flange positioning fixtures.

[0032] The beneficial effects of this invention are as follows:

[0033] This invention pre-cuts positioning slots on the blades, upper flange, and middle flange using laser cutting, and then interlocks and welds them together. The laser cutting has high precision, small manufacturing process error, short rotor forming cycle, good rotor balance, and stable operation of the air classifier, which can reduce equipment failure and improve operating rate.

[0034] In the rotor manufacturing process, the present invention performs multiple dimensional measurements to ensure that the final rotor meets the balance requirements.

[0035] This invention divides a well-balanced rotor into multiple rotor blocks, which are then welded together on-site. This ensures both convenient transportation and that the rotors welded on-site meet the required balance.

[0036] The present invention installs cone positioning clamps on both sides of the split line of the rotor cone, and flange positioning clamps on both sides of the split line of the lower flange, middle flange and upper flange. The cone positioning clamps and flange positioning clamps can make multiple rotor segments tightly fixed together, which facilitates on-site welding of the split positions of multiple rotor segments. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the rotor structure of the present invention.

[0038] Figure 2 This is a top view of the rotor of the present invention.

[0039] Figure 3 This is a schematic diagram of the cone positioning fixture of the present invention.

[0040] Figure 4 This is a schematic diagram of the flange positioning fixture of the present invention.

[0041] Figure 5 This is a plan view of one of the flange clamps of the present invention. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0043] This embodiment provides a method for manufacturing a large-diameter air classifier rotor, including:

[0044] Step 1, Rotor preparation: Prepare a rotor with the required balance.

[0045] Rotor structure as follows Figure 1 As shown, the assembly includes an upper flange 1, a middle flange 3, a lower flange 4, blades 2, a rotor cone 5, and reinforcing ribs 9. Multiple blades 2 are evenly connected circumferentially to the upper flange 1, middle flange 3, and lower flange 4. The spacing between the upper flange 1 and the middle flange 3, the spacing between the middle flanges 3, and the spacing between the lower flange 4 and the middle flange 3 are the same. The rotor cone 5 is located inside the circumference formed by the multiple blades 2. The bottom of the rotor cone 5 is fixedly connected to the lower flange 4, and the rotor cone 5 is connected to the blades 2 via reinforcing ribs 9, which are made of steel plate. The inner diameter of the lower flange 4 is smaller than the inner diameter of the upper flange 1 and the inner diameter of the middle flange 3.

[0046] Step 1.1: Fabricate rotor cone 5 and perform finishing machining;

[0047] Step 1.2: Fabricate the upper flange 1, middle flange 3, and lower flange 4, and correct the flatness and roundness of the upper flange 1, middle flange 3, and lower flange 4 respectively; the flatness tolerance should not exceed 1mm and the roundness tolerance should not exceed 2mm.

[0048] Step 1.3: Position the rotor cone 5 on the lower flange 4, measure the concentricity of the rotor cone 5 and the lower flange 4, and control the concentricity tolerance between 0 and 1 mm; correct the flatness tolerance of the lower flange 4 to not exceed 1 mm.

[0049] Step 1.4: Position the middle flange 3 above the lower flange 4 in sequence, and position the upper flange 1 above the middle flange 3. The lower flange 4 and the middle flange 3, as well as the middle flange 3 and the upper flange 1, are all supported by seamless tubes (all seamless tubes are machined by machine tools) to obtain the preliminary structure of the rotor.

[0050] In step 1.4, there are multiple middle flanges 3, which are located between the upper flange 1 and the lower flange 4. The middle flanges 3 are supported by seamless pipes.

[0051] Step 1.5: Measure the diameter, flatness, and height of the preliminary rotor structure; the tolerance should not exceed 2mm. After the dimensions meet the requirements, spot weld the lower flange 4 and the seamless pipe, the middle flange 3 and the seamless pipe, and the upper flange 1 and the seamless pipe in the preliminary rotor structure. After welding, measure the dimensions of the preliminary rotor structure again. After the dimensions meet the requirements, proceed to the next step.

[0052] Step 1.6: The surfaces of the upper flange 1 and the middle flange 3 are both laser-cut with multiple uniform and spaced first positioning slots in the circumferential direction. The surface of the blade 2 is laser-cut with multiple second positioning slots for insertion into the first positioning slots.

[0053] The multiple second positioning slots on blade 2 are respectively inserted into the first positioning slots of upper flange 1 and middle flange 3, and then the inserted parts are spot welded; the bottom of blade 2 is spot welded to lower flange 4; one end of reinforcing rib 9 is welded to rotor cone 5, and the other end is welded to blade 2. After that, the dimensions are checked. After the dimensions meet the requirements, blade 2 is fully welded to lower flange 4, middle flange 3 and upper flange 1. Reinforcing rib 9 is fully welded to rotor cone 5 and blade 2 to obtain rotor; then, the seamless tube on rotor is removed.

[0054] Among them, multiple blades 2 are evenly connected in the circumferential direction of the upper flange 1, the middle flange 3 and the lower flange 4.

[0055] Step 1.7: Measure the rotor diameter, flatness, and height; the tolerance should not exceed 2mm. Determine if the dimensions meet the requirements. If not, process by grinding, welding, and grinding again until the dimensions meet the requirements.

[0056] Step 2, Rotor Splitting:

[0057] Step 2.1: Mark the split line 8 on the rotor prepared in Step 1, as shown. Figure 2 As shown, multiple positioning fixtures are welded to the vicinity of the split line 8. Each positioning fixture includes two fixture blocks (fixture block one and fixture block two). The two fixture blocks are welded to both sides of the split line 8, and the two fixture blocks are locked together by a connecting structure.

[0058] Step 2.2: Measure the rotor diameter, flatness, and height; the tolerance should not exceed 2mm. Determine if the dimensions meet the requirements. If not, process the rotor by grinding, welding, and grinding again until the dimensions meet the requirements.

[0059] Step 2.3: Remove the connecting structure between the two clamping blocks, and split the rotor along the splitting line 8 to obtain multiple rotor blocks.

[0060] The above steps are performed at the rotor manufacturing plant, and then multiple rotors are transported in sections to the equipment usage site. The following steps are performed at the equipment usage site for assembly.

[0061] Step 3: On-site assembly of rotor sections:

[0062] Step 3.1: Transport multiple rotor blocks to the site, splice the multiple rotor blocks, and connect the clamp blocks on both sides of the split line 8 through the connecting structure so that the multiple rotor blocks are merged into a whole. Then, weld the split line 8 position of the whole. After welding, the rotor is obtained.

[0063] Step 3.2: Remove the positioning clamps from the rotor.

[0064] In step 2.1, the positioning fixture includes two types: a cone positioning fixture 6 and a flange positioning fixture 7.

[0065] The conical positioning fixture 6 includes a first conical fixture block 601 and a second conical fixture block 602, such as... Figure 3 As shown, both cone clamp block 1 (601) and cone clamp block 2 (602) are L-shaped. Both block 1 and block 2 have connecting holes (603). Cone clamp block 1 (601) is fixedly connected to one side of the split line 8 on the rotor cone 5 by welding, and cone clamp block 2 (602) is fixedly connected to the other side of the split line 8 on the rotor cone 5 by welding. The connecting holes (603) on cone clamp block 1 (601) and cone clamp block 2 (602) are locked together by a first connecting structure, which is a bolt. Multiple cone positioning clamps (6) are installed near the split line 8 of the rotor cone 5.

[0066] like Figure 4 and Figure 5As shown, the flange positioning fixture 7 includes flange fixture block one 701 and flange fixture block two 702. Both flange fixture block one 701 and flange fixture block two 702 are U-shaped. Both flange fixture block one 701 and flange fixture block two 702 are provided with connecting holes 603. Flange fixture block one 701 is fixedly connected to one side of the dividing line 8 on the lower flange 4, middle flange 3 or upper flange 1 by welding. Flange fixture block two 702 is fixedly connected to the other side of the dividing line 8 on the lower flange 4, middle flange 3 or upper flange 1 by welding. The connecting holes 603 on flange fixture block one 701 and flange fixture block two 702 are locked together by a second connecting structure. The second connection structure includes a connecting pipe 703 and bolts. The bolts pass sequentially through the connecting holes 603 of flange clamp segment 1 701, the connecting pipe 703, and the connecting holes 603 of flange clamp segment 2 702, and are then connected to the nuts to achieve a locking connection between flange clamp segment 1 701 and flange clamp segment 2 702. Multiple flange positioning clamps 7 are installed near the dividing lines 8 of the upper flange 1, middle flange 3, and lower flange 4.

[0067] Step 3.1 specifically includes: transporting multiple rotor blocks to the site, splicing the multiple rotor blocks, connecting the cone clamp blocks 601 and 602 on both sides of the split line 8 of the rotor cone 5 with bolts, and connecting the flange clamp blocks 701 and 702 on both sides of the split line 8 of the lower flange 4, middle flange 3 and upper flange 1 with connecting pipes 703 and bolts, so that the multiple rotor blocks are merged into a whole, and then welding is performed at the split line 8 position of the whole, and the rotor is obtained after welding.

[0068] There are multiple cone positioning fixtures 6 and flange positioning fixtures 7.

[0069] The rotor in this embodiment also includes wear-resistant blades. Fixing holes are drilled in the blades 2, and the wear-resistant blades 2 are fixed to these holes with bolts. The wear-resistant blades 2 are fixed with bolts, making disassembly easy, replacement cycles short, and costs low.

[0070] In step 2.1 of this invention, fixing holes for connecting with flange fixing plates can be opened on both sides of the split line 8 of the lower flange 4, middle flange 3, and upper flange 1. Then, in step 3.1, multiple rotor blocks are transported to the site and spliced ​​together. The cone clamp blocks 601 and 602 on both sides of the split line 8 of the rotor cone 5 are connected by bolts. The flange clamp blocks 701 and 702 on both sides of the split line 8 of the lower flange 4, middle flange 3, and upper flange 1 are connected by connecting pipes 703 and bolts. The flange fixing plates are also connected to the fixing holes on both sides of the split line 8 of the lower flange 4, middle flange 3, and upper flange 1 by bolts, so that the multiple rotor blocks are merged into a whole. Then, the split line 8 of the whole is welded, and the rotor is obtained after welding. Then, the positioning clamps and flange fixing plates are disassembled.

[0071] This invention pre-cuts positioning slots on the blade 2, upper flange 1, and middle flange 3 using laser cutting, and then interlocks and welds them together. The laser cutting has high precision, small manufacturing process error, short rotor forming cycle, good rotor balance, and stable operation of the classifier, which can reduce equipment failure and improve operating rate.

[0072] In the rotor manufacturing process, the present invention performs multiple dimensional measurements to ensure that the final rotor meets the balance requirements.

[0073] This invention divides a well-balanced rotor into multiple rotor blocks, which are then welded together on-site. This ensures both convenient transportation and that the rotors welded on-site meet the required balance.

[0074] The present invention installs cone positioning clamps 6 on both sides of the split line 8 of the rotor cone 5, and flange positioning clamps 7 on both sides of the split line 8 of the lower flange 4, the middle flange 3 and the upper flange 1. The cone positioning clamps 6 and the flange positioning clamps 7 can make multiple rotor segments tightly fixed together, which facilitates on-site welding of the split positions of multiple rotor segments.

[0075] This invention, through the fabrication and on-site assembly of a rotor, has achieved normal operation and met design requirements. After nearly 6 months of operation, its performance has been stable, meeting customer needs and facilitating the expansion into overseas markets, as well as the survival and development of the enterprise.

[0076] The scope of protection of this invention includes, but is not limited to, the above embodiments. The scope of protection of this invention is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art fall within the scope of protection of this invention.

Claims

1. A method for manufacturing a large-diameter air classifier rotor, characterized in that, include: Step 1, Rotor fabrication: A rotor with satisfactory balance is fabricated at the rotor manufacturing plant; Step 1.1: Make the rotor cone (5); Step 1.2: Fabricate the upper flange (1), middle flange (3) and lower flange (4), and correct the flatness and roundness of the upper flange (1), middle flange (3) and lower flange (4) respectively; the surfaces of the upper flange (1) and middle flange (3) are cut with multiple uniform and spaced first positioning slots in the circumferential direction by laser cutting. Step 1.3: Position the rotor cone (5) on the lower flange (4) and measure the concentricity of the rotor cone (5) and the lower flange (4); Step 1.4: Position the middle flange (3) above the lower flange (4) in sequence, and position the upper flange (1) above the middle flange (3). The lower flange (4) and the middle flange (3), and the middle flange (3) and the upper flange (1) are all supported by seamless pipes to obtain the initial structure of the rotor; Step 1.5: Measure the dimensions of the preliminary rotor structure. After the dimensions meet the requirements, spot weld the seamless tube to the lower flange (4), the seamless tube to the middle flange (3), and the seamless tube to the upper flange (1). After welding, measure the dimensions of the preliminary rotor structure again. After the dimensions meet the requirements, proceed to the next step. Step 1.6: Prepare multiple blades (2). The surface of the blades (2) is laser-cut to have multiple second positioning slots for insertion into the first positioning slot. Insert the multiple second positioning slots on each blade (2) into the first positioning slots of the upper flange (1) and the middle flange (3) respectively, and then spot weld the insertion parts. Spot weld the bottom of the blade (2) to the lower flange (4). Weld one end of the reinforcing rib (9) to the rotor cone (5) and the other end to the blade (2). Then perform size inspection. After the size meets the requirements, weld the blade (2) to the lower flange (4), the middle flange (3) and the upper flange (1). Weld the reinforcing rib (9) to the rotor cone (5) and the reinforcing rib (9) to the blade (2) to obtain the rotor. Then, remove the seamless tube on the rotor. Step 1.7: Measure the rotor dimensions and determine if they meet the requirements. If not, proceed with machining until the dimensions meet the requirements. Step 2, Rotor Splitting: Step 2.1 Mark the split line (8) on the rotor prepared in step 1, and fix the positioning fixture on both sides of the split line (8) by welding. The positioning fixture includes two fixture blocks, which are fixed on both sides of the split line (8) respectively, and the two fixture blocks are locked together by a connecting structure. Step 2.2: Measure the rotor dimensions and determine if they meet the requirements. If not, process the rotor until the dimensions meet the requirements. Step 2.3: Remove the connecting structure between the two clamping blocks, and split the rotor along the splitting line (8) to obtain multiple rotor blocks; Step 3: On-site assembly of rotor sections: Step 3.1: Transport multiple rotor blocks to the site, splice the multiple rotor blocks, and connect the clamp blocks on both sides of the split line (8) through the connecting structure so that the multiple rotor blocks are merged into a whole. Then, perform full welding on the split line (8) of the whole so that the rotor blocks on both sides of the split line (8) are welded into a whole. After welding, the rotor is obtained. Step 3.2: Remove the positioning clamps from the rotor.

2. The method for manufacturing a large-diameter air classifier rotor according to claim 1, characterized in that, The dimensions in steps 1.5, 1.7, and 2.2 include diameter, flatness, and height.

3. The method for manufacturing a large-diameter air classifier rotor according to claim 1, characterized in that, In step 1.4, there are multiple middle flanges (3), which are located between the upper flange (1) and the lower flange (4). The middle flanges (3) are supported by seamless pipes.

4. The method for manufacturing a large-diameter air classifier rotor according to claim 1, characterized in that, In step 2.1, the positioning fixture includes a cone positioning fixture (6). The conical positioning fixture (6) includes a first conical fixture block (601) and a second conical fixture block (602). Both the first conical fixture block (601) and the second conical fixture block (602) are L-shaped. Both the first conical fixture block (601) and the second conical fixture block (602) are provided with connecting holes (603). The first conical fixture block (601) is fixedly connected to one side of the split line (8) on the rotor cone (5) by welding. The second conical fixture block (602) is fixedly connected to the other side of the split line (8) on the rotor cone (5) by welding. The connecting holes (603) on the first conical fixture block (601) and the connecting holes (603) on the second conical fixture block (602) are locked together by a first connecting structure, which is a bolt.

5. The method for manufacturing a large-diameter air classifier rotor according to claim 4, characterized in that, In step 2.1, the positioning fixture also includes a flange positioning fixture (7). The flange positioning fixture (7) includes a flange fixture block one (701) and a flange fixture block two (702). Both flange fixture block one (701) and flange fixture block two (702) are U-shaped. Both flange fixture block one (701) and flange fixture block two (702) are provided with connecting holes (603). Flange fixture block one (701) is fixedly connected to one side of the dividing line (8) on the lower flange (4), middle flange (3) or upper flange (1) by welding. Flange fixture block two (702) is fixedly connected to the other side of the dividing line (8) on the lower flange (4), middle flange (3) or upper flange (1) by welding. The connecting holes (603) on flange fixture block one (701) and flange fixture block two (702) are locked together by a second connecting structure. The second connection structure includes a connecting pipe (703) and bolts. The bolts pass through the connecting holes (603) of the first flange clamp block (701), the connecting pipe (703), and the connecting holes (603) of the second flange clamp block (702) in sequence, and then connect with the nuts to achieve the locking connection of the first flange clamp block (701) and the second flange clamp block (702).

6. The method for manufacturing a large-diameter air classifier rotor according to claim 5, characterized in that, There are multiple cone positioning fixtures (6) and flange positioning fixtures (7).

Images