Fan-shaped wear ring fragmentation repair welding gap control process

Abstract

The invention relates to the technical field of fan manufacturing, operation and maintenance, and discloses a fan-shaped wear ring fragmentation repair welding gap control process which comprises the steps of disassembling an original wear ring and a rotor of a fan, accurately measuring the outer diameter of the rotor and the inner diameter of a mounting part of a wear ring of a machine shell, and calculating the size and deviation distribution of a gap. And the sizes, the number and the repair welding positions of the fan-shaped wear ring segments are designed in combination with fan models and working condition parameters. The wear ring is made of the same material as an original wear ring, fan-shaped wear ring segments are manufactured through high-precision machining equipment, the segment precision is controlled, the repair welding allowance is reserved, the segments are installed one by one and welded in a segmented mode, deviation is monitored in the welding process, detection gaps are finely adjusted when one segment is welded, the inner circle surface of the wear ring is polished after welding, the gaps are measured and verified in a multi-point mode, and it is ensured that the gaps are uniform. According to the process, through full-process precise control and fragmentation type treatment, precise regulation and control of the fit clearance between the impeller ring and the rotor of the fan are achieved, gas backflow is reduced, and eddy current loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine manufacturing and operation and maintenance technology, specifically a process for controlling the gap of segmented welding of a fan-shaped ring. Background Technology

[0002] In industrial process production systems, fans are core general-purpose equipment responsible for gas conveying. Their operating efficiency, energy consumption, and reliability directly determine the economic efficiency and safety stability of the entire production system. The sealing ring, as the core sealing component between the fan rotor and the casing, has a clearance that is a key indicator affecting the amount of gas leakage inside the fan, the overall aerodynamic efficiency, and operating energy consumption.

[0003] In existing technologies, adjusting the clearance of the fan inlet ring mainly involves replacing the entire inlet ring or performing secondary machining after integral welding. This integral process is limited by factors such as the precision of the machining equipment, cumulative assembly errors, and welding deformation. It is difficult to achieve uniform and precise control of the clearance across the entire circumference of the inlet ring. During operation, significant backflow of gas between the high and low pressure zones inside the fan can easily occur. The eddies formed by the leaking airflow generate additional energy loss, leading to a decrease in the fan's aerodynamic efficiency and failing to ensure that the energy output from the impeller is fully utilized for gas transport. Furthermore, the integral clearance adjustment process cannot perform fine-grained adaptation and correction of clearance deviations in different areas, easily resulting in localized interference fits between the inlet ring and the rotor. During operation, excessive friction between the inlet ring and the rotor occurs, exacerbating mechanical wear, increasing the drive load on the fan, increasing energy consumption, and shortening the overall service life of the fan. Therefore, a fan-shaped inlet ring segmented welding clearance control process is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a process for controlling the gap of a fan-shaped mouth ring through segmented welding, thereby solving the aforementioned technical problems of the inability to achieve uniform and precise control of the mouth ring's circumferential fit gap and insufficient mouth ring gap control accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a process for controlling the gap of segmented welding of a fan-shaped ring, comprising:

[0006] S1. Preliminary preparation and precise measurement steps:

[0007] Disassemble the original fan ring and rotor, accurately measure the outer diameter of the rotor and the inner diameter of the fan ring mounting location, calculate the gap size and deviation distribution, and design the size, quantity and welding location of the fan-shaped fan ring segment in combination with the fan model and operating parameters.

[0008] S2. Processing steps for the sector-shaped mouth ring segment:

[0009] Using the same material as the original mouth ring, fan-shaped mouth ring segments are manufactured through high-precision processing equipment, controlling the arc, thickness and edge accuracy of the segments, and reserving a welding allowance;

[0010] S3. Sectional welding and positioning adjustment steps:

[0011] Install the fan-shaped mouth ring segments one by one to the mouth ring mounting position on the housing, and fix them by segment welding. Monitor the positional deviation during the welding process, and check the gap and make fine adjustments after each segment is welded.

[0012] S4. Overall Grinding and Precision Verification Steps:

[0013] The inner surface of the welded ring is finely polished, and the overall gap is checked by multi-point measurement to ensure that the gap is stably controlled within a certain range and is evenly distributed.

[0014] The original fan housing ring and rotor were disassembled, and the outer diameter of the rotor and the inner diameter of the housing ring mounting location were precisely measured. Based on the measurement results, the current gap size and deviation distribution of the ring were calculated. Combined with the fan model and operating parameters, the size, quantity, and welding location of the fan-shaped ring segments were designed.

[0015] Using the same material as the original mouth ring, fan-shaped mouth ring segments are manufactured through high-precision processing equipment. During the processing, the curvature, thickness, and edge precision of the fan-shaped mouth ring segments are strictly controlled, while a suitable allowance for welding repair is reserved.

[0016] The processed sector-shaped ring segments are installed piece by piece to the ring mounting position on the machine housing. They are fixed by segmented welding. During the welding process, the positional deviation of the sector-shaped ring segments is monitored in real time. After each sector-shaped ring segment is welded, the gap between the segment and the rotor is checked and fine-tuned according to the test results. After confirming that the gap of a single segment meets the requirements, the welding and adjustment of the next sector-shaped ring segment is carried out.

[0017] After all the fan-shaped ring segments are welded, the inner circular surface of the ring is finely ground to remove welding marks and surface burrs. A multi-point measurement method is used to fully verify the overall gap between the ring and the rotor to ensure that the gap between the ring and the rotor is stably controlled within the preset range and is evenly distributed. Any gaps that do not meet the requirements are adjusted again until the accuracy requirements are fully met.

[0018] Preferably, in step S1, the preliminary preparation and precise measurement, the number of fan-shaped ring segments is determined according to the diameter of the fan ring; for rings with larger diameters, the number of segments is appropriately increased.

[0019] In step S1, preliminary preparation and precise measurement, after completing the size measurement and clearance deviation calculation of the fan inlet ring and rotor, the number of fan-shaped inlet ring segments is determined according to the diameter of the fan inlet ring. For inlet rings with larger diameters, the number of fan-shaped inlet ring segments is increased accordingly, and the design of the welding position of the fan-shaped inlet ring segments is completed simultaneously.

[0020] Preferably, in step S3, the segmented welding and positioning adjustment, during the segmented welding process, each sector ring is rotated once during positioning to confirm that there is no friction before fixing. The welding sequence is controlled by a symmetrical welding method, and the welding temperature is adjusted according to the material characteristics.

[0021] In step S3, segmented welding and positioning adjustment, after the installation and positioning of a single sector ring segment is completed, a one-turn rotation operation is performed to confirm that there is no frictional interference between the sector ring segment and the rotor before welding and fixing. During the welding operation, a symmetrical welding method is used to control the welding sequence, and the welding temperature is adjusted according to the material characteristics of the sector ring segment.

[0022] Preferably, in steps S3, segmented welding and positioning adjustment, and S4, overall grinding and precision verification, a dial indicator is used to measure the gap. During overall gap verification, multiple measurement points are evenly selected in the circumferential direction of the ring to ensure uniform gap distribution.

[0023] In step S3, segmented welding and positioning adjustment, a dial indicator is used to measure the gap between a single sector ring segment and the rotor. In step S4, overall grinding and precision verification, a dial indicator is used to perform overall gap verification. During the verification process, multiple measurement points are evenly selected in the circumferential direction of the ring to complete the gap detection and check the uniformity of the gap distribution around the entire ring.

[0024] Preferably, in step S2, the welding allowance of the fan-shaped ring segment is set along the thickness direction of the segment, and the processing accuracy of the welding allowance is uniformly controlled during the processing.

[0025] In step S2, the processing of the fan-shaped ring segment, a welding allowance is set along the thickness direction of the fan-shaped ring segment. During the overall processing of the fan-shaped ring segment, the processing accuracy of the welding allowance is uniformly controlled.

[0026] Preferably, in step S3, the segmented welding and positioning adjustment, the installation and welding of the next segment of the fan-shaped mouth ring is carried out only after the welding and gap adjustment of a single segment of the fan-shaped mouth ring are completed.

[0027] In step S3, segmented welding and positioning adjustment, the welding and fixing of a single sector-shaped mouth ring segment and the gap fine adjustment are completed. After confirming that the gap of the segment meets the design requirements, the installation, positioning and welding of the next sector-shaped mouth ring segment can be carried out.

[0028] Preferably, in step S4, the overall grinding and precision verification, the fine grinding operation covers the complete inner circular surface of the mouth ring, and the welding marks and surface burrs on the inner circular surface of the mouth ring are removed during the grinding process.

[0029] In step S4, overall grinding and precision verification, after completing the welding of all fan-shaped ring segments, fine grinding is carried out on the complete inner circular surface of the ring. During the grinding process, welding marks and surface burrs on the inner circular surface of the ring are completely removed.

[0030] Preferably, in step S4, overall grinding and precision verification, after the overall gap verification is completed, secondary grinding and position adjustment are carried out on the local positions where the gap does not meet the requirements.

[0031] In step S4, overall grinding and precision verification, after completing the overall clearance verification of the mouth ring, for the local locations where the clearance does not meet the requirements, secondary grinding and position adjustment are carried out until the local clearance meets the design requirements.

[0032] Preferably, in step S2, the processing arc of the fan-shaped mouth ring segment is consistent with the inner arc of the housing mouth ring mounting part, and the edge processing accuracy of the segment is controlled throughout the processing process.

[0033] In step S2, the processing arc of the fan-shaped mouth ring segment is controlled to be consistent with the inner arc of the housing mouth ring mounting part. Throughout the entire processing of the fan-shaped mouth ring segment, the edge processing accuracy of the segment is controlled.

[0034] Preferably, in step S4, overall grinding and precision verification, after the grinding operation of the inner circle surface of the mouth ring is completed, a comprehensive check is performed on the flatness and smoothness of the inner circle surface of the ground mouth ring.

[0035] In step S4, overall grinding and precision verification, after grinding the inner surface of the mouth ring, a comprehensive check is carried out on the flatness and smoothness of the ground inner surface of the mouth ring.

[0036] Compared with the prior art, the present invention provides a process for controlling the gap of segmented welding of a fan-shaped ring, which has the following beneficial effects:

[0037] This fan-shaped ring segmented welding gap control process, through precise control of the entire process and segmented ring treatment, can achieve precise regulation of the gap between the fan ring and the rotor, effectively reducing gas backflow in the high and low pressure range inside the fan, reducing eddy current losses caused by leaked airflow, ensuring that the output energy of the fan impeller is fully utilized for gas delivery, and improving the aerodynamic operating efficiency of the fan.

[0038] By employing a piece-by-piece installation, welding, inspection, and adjustment process, the problem of excessive friction between the bearing ring and the rotor can be effectively avoided, reducing mechanical wear during equipment operation, lowering the drive load on the fan, thereby reducing energy consumption and extending the overall service life of the fan.

[0039] No large-scale modification of the wind turbine equipment is required, nor is it necessary to replace the entire wind turbine ring. Precise control of the ring gap can be achieved simply through a pre-defined piecewise welding process. The process is easy to implement, the operating cost is controllable, and it can be adapted to the preparation and modification of different types of wind turbines.

[0040] Through precise measurement and dynamic verification and adjustment throughout the entire process, dimensional deviations generated during the processing and assembly of the mouth ring can be effectively eliminated, ensuring uniform gap distribution in the circumferential direction of the mouth ring, avoiding equipment malfunctions caused by gap deviations, and improving the stability and reliability of the fan operation. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the process flow of the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention provides a technical solution, a process for controlling the gap of segmented welding of a fan-shaped ring, including: (See details) Figure 1 S1. Preliminary preparation and precise measurement steps:

[0044] Disassemble the original fan ring and rotor, accurately measure the outer diameter of the rotor and the inner diameter of the fan ring mounting location, calculate the gap size and deviation distribution, and design the size, quantity and welding location of the fan-shaped fan ring segment in combination with the fan model and operating parameters.

[0045] S2. Processing steps for the sector-shaped mouth ring segment:

[0046] Using the same material as the original mouth ring, fan-shaped mouth ring segments are manufactured through high-precision processing equipment, controlling the arc, thickness and edge accuracy of the segments, and reserving a welding allowance;

[0047] S3. Sectional welding and positioning adjustment steps:

[0048] Install the fan-shaped mouth ring segments one by one to the mouth ring mounting position on the housing, and fix them by segment welding. Monitor the positional deviation during the welding process, and check the gap and make fine adjustments after each segment is welded.

[0049] S4. Overall Grinding and Precision Verification Steps:

[0050] The inner surface of the welded ring is finely polished, and the overall gap is checked by multi-point measurement to ensure that the gap is stably controlled within a certain range and is evenly distributed.

[0051] Through the process design of segmented processing and piece-by-piece welding adjustment, the gap between the mouth ring and the rotor can be precisely controlled, minimizing gas leakage between the high-pressure and low-pressure areas inside the fan, reducing energy loss caused by the eddies formed by leaked gas, and enabling the energy output by the impeller to be efficiently used for gas transportation, greatly improving the aerodynamic efficiency and media transportation capacity of the fan, and reducing the operating load of the fan.

[0052] After the operating efficiency of the fan is improved, the operating load of the matching drive motor can be effectively reduced, the energy loss caused by wasted effort can be reduced, and excellent energy-saving effect can be achieved. At the same time, precise and uniform gap control can avoid excessive friction between the bearing ring and the rotor, reduce the operating wear of mechanical parts, extend the service life of the fan and matching drive equipment, and significantly reduce the daily operation and maintenance cost and component replacement cost of the equipment.

[0053] No large-scale modification of the wind turbine equipment or replacement of the entire mouth ring component is required. Precise control of the mouth ring gap can be achieved simply by patching and welding and fine-tuning the gap. The process is simple and cost-effective. It can be adapted to the preparation of new wind turbines and the renovation of old ones, and has strong applicability and promotion value.

[0054] By employing a piece-by-piece welding and piece-by-piece inspection and adjustment process, the cumulative errors generated during the processing and assembly of the mouth ring can be effectively eliminated, ensuring that the gap between the mouth ring and the rotor is evenly distributed in the circumferential direction. This avoids problems such as fan vibration and instability caused by gap deviation, and significantly improves the reliability and safety of the fan in long-term operation.

[0055] S1. In the preliminary preparation and precise measurement steps, the number of fan-shaped ring segments is determined according to the diameter of the fan ring. For rings with larger diameters, the number of segments should be increased appropriately.

[0056] By adjusting the number of fan-shaped ring segments according to the ring diameter, the accuracy of ring gap adjustment can be improved, adapting to the ring modification and fabrication needs of different fan specifications, and ensuring the adaptability and adjustment flexibility of the segmented welding process.

[0057] In step S3, segmented welding and positioning adjustment, during the segmented welding process, each sector ring needs to be rotated around once during positioning to confirm that there is no friction before fixing. The welding sequence is controlled by symmetrical welding, and the welding temperature is adjusted according to the material characteristics.

[0058] By checking the welding machine in advance, friction interference problems that may occur after welding and fixing can be avoided. Symmetrical welding and adaptive welding temperature control can effectively suppress welding deformation problems, avoid gap deviation caused by welding operations, and ensure the control accuracy of the mouth ring gap.

[0059] In steps S3, patch welding and positioning adjustment, and S4, overall grinding and precision verification, a dial indicator is used to measure the gap. During the overall gap verification, multiple measurement points are evenly selected in the circumferential direction of the ring to ensure uniform gap distribution.

[0060] Using standardized precision measuring tools to complete the entire gap detection process ensures the consistency and accuracy of the gap detection data. The multi-point evenly distributed measurement method can fully cover the gap status of the entire circumference of the mouth ring, avoiding the problem of missing local gap deviations and ensuring the uniformity of the overall gap distribution of the mouth ring.

[0061] S2. In the processing steps of the fan-shaped mouth ring segment, the welding allowance of the fan-shaped mouth ring segment is set along the thickness direction of the segment, and the processing accuracy of the welding allowance is uniformly controlled during the processing.

[0062] Setting a welding allowance along the thickness direction allows for sufficient operating space for precise adjustment of the gap in the future. Unified control of the machining accuracy of the welding allowance can ensure the consistency of machining of each sector ring segment, laying a stable foundation for subsequent piecewise welding and gap adjustment operations.

[0063] In step S3, segmented welding and positioning adjustment, after the welding and gap adjustment of a single sector-shaped ring segment are completed, the installation and welding of the next sector-shaped ring segment can be carried out.

[0064] By completing the welding and gap adjustment work sequence piece by piece, precise control of the gap of a single sector ring segment can be achieved, avoiding the problem of deviation accumulation caused by simultaneous operation of multiple pieces. At the same time, it is convenient to adjust the position and gap status of a single segment in a timely manner, ensuring the control accuracy of the gap of the entire circumference ring.

[0065] S4. In the overall grinding and precision verification steps, the fine grinding operation covers the complete inner circle surface of the mouth ring, and the welding marks and surface burrs on the inner circle surface of the mouth ring are removed during the grinding process.

[0066] The grinding process covering the entire inner circle surface ensures the consistency of the inner circle surface of the mouth ring. Thoroughly removing welding marks and surface burrs can avoid the scratching and wear problems that occur between the mouth ring and the rotor during operation. At the same time, it reduces the eddy current loss generated when the airflow passes through the gap, ensuring the operating stability and aerodynamic efficiency of the fan.

[0067] S4. In the overall grinding and precision verification step, after the overall gap verification is completed, secondary grinding and position adjustment are carried out on the local positions where the gap does not meet the requirements.

[0068] Secondary grinding and adjustment can specifically eliminate local gap deviations, ensuring that the gaps around the entire circumference of the mouth ring meet the design accuracy requirements, avoiding gas leakage caused by excessive local gaps, and further improving the integrity and accuracy of mouth ring gap control.

[0069] S2. In the processing step of the fan-shaped mouth ring segment, the processing arc of the fan-shaped mouth ring segment is consistent with the inner arc of the mouth ring mounting part of the housing, and the edge processing accuracy of the segment is controlled throughout the processing process.

[0070] Ensuring the curvature compatibility between the fan-shaped ring segment and the mounting position of the housing ring improves the fit and stability of the fan-shaped ring segment installation. Full control of edge processing precision ensures the overall roundness of the spliced ​​multi-segment fan-shaped ring segments, avoiding uneven gaps caused by splicing deviations, and providing a basic guarantee for subsequent precise gap control.

[0071] S4. In the overall grinding and precision verification step, after the grinding operation of the inner circle surface of the mouth ring is completed, the flatness and smoothness of the inner circle surface of the ground mouth ring are fully checked.

[0072] By comprehensively checking the flatness and smoothness of the inner surface of the mouth ring, surface defects remaining after grinding can be eliminated in a timely manner, ensuring the forming quality of the inner surface of the mouth ring, avoiding operational wear and airflow disturbance problems caused by surface defects, and further improving the stability and aerodynamic efficiency of the fan operation.

[0073] This solution involves disassembling the original fan housing and rotor, accurately measuring the rotor's outer diameter and the inner diameter of the housing's fan housing mounting area, calculating the current gap size and deviation distribution of the fan housing based on the measurement results, and designing the size, quantity, and welding positions of the fan-shaped fan housing segments in conjunction with the fan model and operating parameters. The number of fan-shaped fan housing segments is determined according to the fan housing diameter, with an increase in the number of segments for larger diameter fan housings. The final confirmation of the welding positions for the fan-shaped fan housing segments is completed simultaneously.

[0074] Using the same material as the original mouth ring, a fan-shaped mouth ring segment is manufactured through high-precision machining equipment. The machining arc of the fan-shaped mouth ring segment is controlled to be consistent with the inner arc of the mouth ring mounting part of the housing. During the machining process, the arc, thickness, and edge accuracy of the fan-shaped mouth ring segment are strictly controlled. The edge machining accuracy of the segment is controlled throughout the entire machining process. A welding allowance is set along the thickness direction of the fan-shaped mouth ring segment, and the machining accuracy of the welding allowance is uniformly controlled, with a suitable welding allowance reserved.

[0075] The processed sector-shaped ring segments are installed piece by piece to the ring mounting position on the housing. After the installation and positioning of a single sector-shaped ring segment is completed, a full rotation operation is performed to confirm that there is no frictional interference between the sector-shaped ring segment and the rotor before welding and fixing. A segmented welding method is used for fixing, and a symmetrical welding method is used to control the welding sequence during the welding operation. At the same time, the welding temperature is adjusted according to the material characteristics of the sector-shaped ring segments. The positional deviation of the sector-shaped ring segments is monitored in real time during the welding process. After each sector-shaped ring segment is welded, a dial indicator is used to measure the gap between the sector-shaped ring segment and the rotor, and fine adjustments are made based on the test results. After confirming that the gap of a single segment meets the design requirements, the installation, positioning, and welding of the next sector-shaped ring segment can be carried out.

[0076] After all the fan-shaped ring segments are welded, a fine grinding operation is carried out on the complete inner circular surface of the ring. During the grinding process, all welding marks and surface burrs on the inner circular surface of the ring are completely removed. After the grinding operation of the inner circular surface of the ring is completed, a comprehensive inspection of the flatness and smoothness of the ground inner circular surface is carried out. A dial indicator is used as a precision measuring tool to carry out an overall gap check. During the check, measurement points are evenly selected in the circumference of the ring to complete the gap detection and check the uniformity of the gap distribution around the entire circumference of the ring. This ensures that the gap between the ring and the rotor is stably controlled within the preset range and is evenly distributed. After the overall gap check of the ring is completed, for the local locations where the gap does not meet the requirements, a secondary grinding operation and position adjustment operation are carried out until the local gap meets the design requirements.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for controlling the gap of segmented welding repair of a fan-shaped mouth ring, characterized in that, include: S1. Preliminary preparation and precise measurement steps: Disassemble the original fan ring and rotor, accurately measure the outer diameter of the rotor and the inner diameter of the fan ring mounting location, calculate the gap size and deviation distribution, and design the size, quantity and welding location of the fan-shaped fan ring segment in combination with the fan model and operating parameters. S2. Processing steps for the sector-shaped mouth ring segment: Using the same material as the original mouth ring, fan-shaped mouth ring segments are manufactured through high-precision processing equipment, controlling the arc, thickness and edge accuracy of the segments, and reserving a welding allowance; S3. Sectional welding and positioning adjustment steps: Install the fan-shaped mouth ring segments one by one to the mouth ring mounting position on the housing, and fix them by segment welding. Monitor the positional deviation during the welding process, and check the gap and make fine adjustments after each segment is welded. S4. Overall Grinding and Precision Verification Steps: The inner surface of the welded ring is finely polished, and the overall gap is checked by multi-point measurement to ensure that the gap is stably controlled within a certain range and is evenly distributed.

2. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S1, preliminary preparation and precise measurement, the number of fan-shaped ring segments is determined according to the diameter of the fan ring; for rings with larger diameters, the number of segments is increased appropriately.

3. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S3, segmented welding and positioning adjustment, during the segmented welding process, each sector ring needs to be rotated around once during positioning to confirm that there is no friction before fixing. The welding sequence is controlled by a symmetrical welding method, and the welding temperature is adjusted according to the material characteristics.

4. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In steps S3, patch welding and positioning adjustment, and S4, overall grinding and precision verification, a dial indicator is used to measure the gap. During overall gap verification, multiple measurement points are evenly selected in the circumferential direction of the ring to ensure uniform gap distribution.

5. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S2, the welding allowance of the fan-shaped mouth ring segment is set along the thickness direction of the segment, and the processing accuracy of the welding allowance is uniformly controlled during the processing.

6. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S3, segmented welding and positioning adjustment, after the welding and gap adjustment of a single sector-shaped ring segment are completed, the installation and welding of the next sector-shaped ring segment will be carried out.

7. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S4, the overall grinding and precision verification, the fine grinding operation covers the complete inner circular surface of the mouth ring, and the welding marks and surface burrs on the inner circular surface of the mouth ring are removed during the grinding process.

8. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S4, overall grinding and precision verification, after the overall gap verification is completed, secondary grinding and position adjustment are carried out on the local positions where the gap does not meet the requirements.

9. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S2, the processing arc of the fan-shaped mouth ring segment is consistent with the inner arc of the housing mouth ring mounting part, and the edge processing accuracy of the segment is controlled throughout the processing process.

10. The process for controlling the gap of segmented welding of a fan-shaped mouth ring according to claim 1, characterized in that: In step S4, overall grinding and precision verification, after the grinding operation of the inner circle surface of the mouth ring is completed, a comprehensive check is performed on the flatness and smoothness of the inner circle surface of the ground mouth ring.

Images