CN114473377A - Manufacturing method of water turbine split volute seat ring - Google Patents
Manufacturing method of water turbine split volute seat ring Download PDFInfo
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- CN114473377A CN114473377A CN202210003741.XA CN202210003741A CN114473377A CN 114473377 A CN114473377 A CN 114473377A CN 202210003741 A CN202210003741 A CN 202210003741A CN 114473377 A CN114473377 A CN 114473377A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a method for manufacturing a water turbine split volute seat ring, which belongs to the technical field of water turbine manufacturing and is characterized by comprising the following steps of: a. integrally blanking the disc-shaped edges and the compensation sections, integrally rolling and molding the disc-shaped edges and the compensation sections, and then respectively cutting the disc-shaped edges and the compensation sections into single pieces, wherein the adjacent disc-shaped edges are an integral single piece; b. the two volute seat rings are split and are fixed in a group circle lap joint mode, and then the disc-shaped edges at the split surfaces of the volute seat rings are integrally assembled and welded; c. and pre-assembling the compensation joint at the splitting surface of the volute casing seat ring to complete the manufacture of the volute casing seat ring. The invention can avoid the problem of overproof and mismatching in the preassembling and assembling of the split volute seat ring compensation joint and the dish-shaped edge of the large-scale water turbine, ensures the stability of the manufacturing quality, has simple manufacturing process and can effectively improve the manufacturing efficiency.
Description
Technical Field
The invention relates to the technical field of water turbine manufacturing, in particular to a manufacturing method of a water turbine split volute casing seat ring.
Background
The diameter of the volute casing seat ring of the water turbine of the large-scale pumped storage unit usually exceeds 11m, a split structure is generally adopted for facilitating transportation to an installation site, a compensation joint and a dish-shaped edge are arranged at a split position, and after the compensation joint and the dish-shaped edge are preassembled, a single piece is sent to the site to participate in circular welding of the volute casing seat ring group. The disc-shaped edge and the compensation joint are both formed by single-piece numerical control cutting blanking roll forming, the forming size precision is low, and the deviation of corresponding parts is difficult to ensure to be consistent, for example, the radial size is positive difference or negative difference, so that the disc-shaped edge circular seam, the disc-shaped edge and the compensation joint longitudinal seam at the split part of the volute seat ring generate stagger which far exceeds the relevant national standard during assembly.
Chinese patent publication No. CN 112922765a, published 2021, 06/08, discloses a manufacturing process of a split runner of a large impulse turbine, which is characterized by comprising the following steps:
step 1: the material of the rotating wheel is martensite forged steel, the first single-piece part of the rotating wheel, the second single-piece part of the rotating wheel, the first water bucket end part and the second water bucket end part of the split combination surface of the rotating wheel are respectively forged according to the split structure of the rotating wheel, and the first single-piece part of the rotating wheel, the second single-piece part of the rotating wheel, the first water bucket end part and the second water bucket end part of the split combination surface of the rotating wheel are respectively processed in a numerical control mode in a manufacturing plant after forging;
step 2: in the numerical control machining of the first single section of the rotating wheel and the second single section of the rotating wheel, except for the root of the first bucket on the section dividing surface of the rotating wheel and the root profile of the first bucket, the numerical control machining of the buckets is finished in a water turbine product manufacturing plant;
and step 3: the method comprises the following steps of (1) processing a groove of a split combined weld of a rotating wheel, wherein the groove of the split combined weld of the rotating wheel is processed on a split surface and a split surface of a first single split of the rotating wheel and a second single split of the rotating wheel in a numerical control processing mode, the groove is a narrow gap welding groove, the groove is a double-side U-shaped narrow gap groove, the groove angle alpha is 0.3-3 degrees, the root arc radius R is 6-15 mm, the groove depth h is 1/3-2/3 t, and the groove blunt edge b is 1-10 mm;
and 4, step 4: assembling a first single lobe of a rotating wheel and a second single lobe of the rotating wheel on site at a hydropower station site;
and 5: the runner split combined welding seam is welded by adopting narrow-gap submerged-arc welding, the split combined welding seam of a first single-lobe runner and a second single-lobe runner is welded, the thickness of the welding seam is larger than 800mm, the welding position is a flat welding position, the combined welding seam is a full penetration welding seam, the root of the welding seam is not back gouged, grooves on two sides are welded alternately, and the welding quantity of each side groove before alternation is not more than 100 mm;
step 6: nondestructive inspection detection is carried out on the rotating wheel split combined welding line, and after the rotating wheel split combined welding line is welded, nondestructive inspection detection is carried out on the combined welding line;
and 7: processing the root of the rotor wheel split surface bucket, namely processing the root of a first bucket and the root of a second bucket of the rotor wheel split surface in a numerical control processing mode until the design size requirement is met;
and 8: assembling the end part of the first water bucket with the root part of the first water bucket and the root part of the second water bucket with the root part of the second water bucket according to design requirements;
and step 9: the combined welding of the end parts of the water buckets on the split surfaces of the rotating wheel adopts tungsten inert gas welding and gas metal arc welding to weld combined welding seams of the end parts of the first water bucket and the root part of the first water bucket and the end parts of the first water bucket and the second water bucket, the main body part of the combined welding seam adopts gas metal arc welding to weld, and the welding seam of the surface layer of the positive pressure surface of the water bucket within the range of 1-40 mm adopts tungsten inert gas welding to weld;
step 10: nondestructive flaw detection of the combined weld at the end part of the rotating wheel split surface water bucket is carried out, and after the welding of the combined weld at the end part of the rotating wheel split surface water bucket is finished, nondestructive flaw detection is carried out on the combined weld;
step 11: carrying out post-welding stress relief heat treatment on the runner on a hydropower station site;
step 12: the turning wheel is machined, and the turning wheel is integrally machined in a numerical control machining mode;
step 13: after the rotating wheel is subjected to numerical control machining, carrying out static balance test and balance weight on the rotating wheel, and eliminating the unbalanced moment of the rotating wheel;
step 14: and (3) polishing the surface of the rotating wheel water bucket by adopting an automatic mechanical polishing mode to meet the requirement of surface smoothness of the impact type rotating wheel water bucket.
According to the manufacturing process method of the split runner of the large-sized impulse turbine, the welding seam main body part is welded by adopting a consumable electrode gas shielded welding process, and the welding production benefit is improved. However, the problem of excessive and staggered openings still easily occurs in the preassembly and assembly of the split volute seat ring compensation joint and the disc-shaped edge of the large-sized water turbine, the stability of the manufacturing quality is affected, the process is quite complex, and the manufacturing efficiency is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a manufacturing method of a split volute seat ring of a water turbine, which can avoid the problem of overproof and staggered openings in the preassembly and assembly of a large-scale split volute seat ring compensation joint and a dish-shaped edge, ensure the stability of the manufacturing quality, have simple manufacturing process and can effectively improve the manufacturing efficiency.
The invention is realized by the following technical scheme:
a manufacturing method of a water turbine split volute casing seat ring is characterized by comprising the following steps:
a. integrally blanking the disc-shaped edges and the compensation sections, integrally rolling and molding the disc-shaped edges and the compensation sections, and then respectively cutting the disc-shaped edges and the compensation sections into single pieces, wherein the adjacent disc-shaped edges are an integral single piece;
b. the two volute seat rings are split and are fixed in a group circle lap joint mode, and then the disc-shaped edges at the split surfaces of the volute seat rings are integrally assembled and welded;
c. and pre-assembling the compensation joint at the splitting surface of the volute casing seat ring to complete the manufacture of the volute casing seat ring.
In the step a, the integral blanking of the disc-shaped edge and the compensation joint refers to the integral blanking of the disc-shaped edge and the compensation joint through a numerical control machine, the cutting allowance required by the preset assembly of the periphery of the disc-shaped edge and the periphery of the compensation joint is reserved in the expansion length direction, and the forming allowance is reserved.
The matching and cutting allowance is 50mm, and the forming allowance is 100 mm.
In the step a, the integral rolling forming of the disc-shaped edge and the compensation joint is the rolling forming through a rolling machine.
In the step b, 5-7mm of machining allowance is reserved on one side of the split surface of the volute seat ring before two volute seat ring segments are subjected to circle combination.
In the step b, the integral assembly and welding of the disc-shaped edges at the split position of the volute seat ring means that the adjacent disc-shaped edges are integrally assembled and welded, the process supports are arranged on the disc-shaped edges on the two sides of the split surface, the welding deformation of the disc-shaped edges is controlled, and the welding is completed.
After the welding is finished, cutting the adjacent disc-shaped edges from the split surfaces, splitting the two volute casing seat rings, performing furnace heat treatment on the split volute casing seat rings, and processing the split surfaces of the volute casing seat rings to finish the processing of the annular seam grooves of the adjacent disc-shaped edges.
In the step c, pre-assembling the compensation joint at the valving surface of the volute seat ring means removing the allowance of the compensation joint, and connecting the groove of the compensation joint and the groove of the disc-shaped edge in a consistent processing manner.
The beneficial effects of the invention are mainly shown in the following aspects:
1. a, integrally blanking a disc-shaped edge and a compensation section, integrally rolling and molding the disc-shaped edge and the compensation section, and then respectively cutting the disc-shaped edge and the compensation section into single pieces, wherein the adjacent disc-shaped edges are an integral single piece; b. the two volute seat rings are divided into segments, the segments are fixed in a circle-to-circle lap joint mode, and then the disc-shaped edges at the dividing surfaces of the volute seat rings are integrally assembled and welded; c. the compensation joint is preassembled at the split surface of the volute seat ring, the volute seat ring is manufactured, compared with the prior art, the problem that the standard exceeding and the wrong opening occur in the preassembly and the assembly of the split volute seat ring compensation joint and the dish-shaped edge of the large-scale water turbine can be avoided, the stability of the manufacturing quality is guaranteed, the manufacturing process is simple, and the manufacturing efficiency can be effectively improved.
2. In the step a, the integral blanking of the disc-shaped edge and the compensation joint refers to the integral blanking of the disc-shaped edge and the compensation joint through a numerical control machine tool, the cutting allowance required by the assembly of the disc-shaped edge and the periphery of the compensation joint is preset, and the forming allowance is reserved in the unfolding length direction, so that the subsequent processing quality is favorably ensured.
3. In the step b, the integral assembly and welding of the disc-shaped edges at the split position of the volute casing seat ring means that the adjacent disc-shaped edges are integrally assembled and welded, the process supports are arranged on the disc-shaped edges on the two sides of the split surface, the welding deformation of the disc-shaped edges is controlled, the welding is completed, the process supports are arranged on the disc-shaped edges on the two sides of the split surface, the quick assembly of the disc-shaped edges is facilitated, and the manufacturing efficiency of the whole volute casing seat ring is improved.
4. The invention simplifies the whole processing technology, realizes standardization, flow and standardization of the manufacturing process of the split type seat ring of the large-scale water turbine, reduces the interference of human factors and improves the processing efficiency and the processing effect.
5. In the step c, the compensation joint is preassembled at the split surface of the volute casing seat ring, namely the allowance of the compensation joint is removed, the groove of the compensation joint is processed to be consistent with the groove of the disc-shaped edge and then connected, and because the connection part of the compensation joint and the disc-shaped edge is the cut part of the same integral forming piece, the groove of the compensation joint and the groove of the disc-shaped edge are processed to be consistent and then connected, the generation of staggered joint can be effectively avoided, and the processing quality of the volute casing seat ring is guaranteed.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, wherein:
FIG. 1 is a schematic view of the volute receptacle ring of the present invention;
the labels in the figure are: 1. disc-shaped edge, 2, compensation section, 3, volute casing seat ring split, 4, split surface.
Detailed Description
Example 1
Referring to fig. 1, a method for manufacturing a seat ring of a split volute of a water turbine includes the following steps:
a. integrally blanking the disc-shaped edges 1 and the compensation sections 2, integrally rolling and molding the disc-shaped edges 1 and the compensation sections 2, and then respectively cutting the disc-shaped edges 1 and the compensation sections into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece;
b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded;
c. and (3) pre-assembling the compensation joint 2 at the splitting surface 4 of the volute seat ring to complete the manufacture of the volute seat ring.
The embodiment is the most basic embodiment, a, integrally blanking a disc-shaped edge 1 and a compensation joint 2, integrally roll-forming the disc-shaped edge 1 and the compensation joint 2, and then respectively cutting the disc-shaped edge 1 and the compensation joint into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece; b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded; c. the compensation joint 2 is preassembled at the split surface 4 of the volute seat ring, the manufacture of the volute seat ring is completed, compared with the prior art, the problem that the standard exceeding and the wrong opening occur in the preassembly and the assembly of the split volute seat ring compensation joint 2 and the disc-shaped edge 1 of the large-scale water turbine can be avoided, the stability of the manufacturing quality is guaranteed, the manufacturing process is simple, and the manufacturing efficiency can be effectively improved.
Example 2
Referring to fig. 1, a method for manufacturing a seat ring of a split volute of a water turbine includes the following steps:
a. integrally blanking the disc-shaped edges 1 and the compensation sections 2, integrally rolling and molding the disc-shaped edges 1 and the compensation sections 2, and then respectively cutting the disc-shaped edges 1 and the compensation sections into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece;
b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded;
c. and (3) pre-assembling the compensation joint 2 at the splitting surface 4 of the volute seat ring to complete the manufacture of the volute seat ring.
In the step a, the integral blanking of the disc-shaped edge 1 and the compensation joint 2 refers to the integral blanking of the disc-shaped edge 1 and the compensation joint 2 through a numerical control machine tool, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge 1 and the compensation joint 2 is reserved in the unfolding length direction, and the forming allowance is reserved.
In the step a, the step of integrally blanking the disc-shaped edge 1 and the compensation joint 2 means that the disc-shaped edge 1 and the compensation joint 2 are integrally blanked by a numerical control machine, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge 1 and the compensation joint 2 is reserved in the unfolding length direction, and the forming allowance is reserved in the unfolding length direction, so that the subsequent processing quality is favorably ensured.
Example 3
Referring to fig. 1, a method for manufacturing a seat ring of a split volute of a water turbine includes the following steps:
a. integrally blanking the disc-shaped edges 1 and the compensation sections 2, integrally rolling and molding the disc-shaped edges 1 and the compensation sections 2, and then respectively cutting the disc-shaped edges 1 and the compensation sections into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece;
b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded;
c. and (3) pre-assembling the compensation joint 2 at the splitting surface 4 of the volute seat ring to complete the manufacture of the volute seat ring.
In the step a, the integral blanking of the disc-shaped edge 1 and the compensation joint 2 refers to the integral blanking of the disc-shaped edge 1 and the compensation joint 2 through a numerical control machine tool, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge 1 and the compensation joint 2 is reserved in the unfolding length direction, and the forming allowance is reserved.
The matching and cutting allowance is 50mm, and the forming allowance is 100 mm.
In the step a, the integral roll forming of the disc-shaped edge 1 and the compensation joint 2 is roll forming by a roll press.
In the step b, 5mm of machining allowance is reserved on one side of the 3 surfaces of the two volute seat ring segments 3 before the two volute seat ring segments 3 are subjected to circle combination.
In the step b, the integral assembly and welding of the disc-shaped edges 1 at the split positions of the volute casing seat ring 3 means that the adjacent disc-shaped edges 1 are integrally assembled and welded, the process supports are arranged on the disc-shaped edges 1 at the two sides of the split surface 4, the welding deformation of the disc-shaped edges 1 is controlled, and the welding is completed.
In this embodiment, as another preferred embodiment, in the step b, the integral assembling and welding of the disk-shaped edges 1 at the segments 3 of the volute seat ring refers to the integral assembling and welding of the adjacent disk-shaped edges 1, the process supports are arranged on the disk-shaped edges 1 on both sides of the segment surface 4, the welding deformation of the disk-shaped edges 1 is controlled, the welding is completed, the process supports are arranged on the disk-shaped edges 1 on both sides of the segment surface 4, the quick assembling of the disk-shaped edges 1 is facilitated, and the manufacturing efficiency of the whole volute seat ring is improved.
Example 4
Referring to fig. 1, a method for manufacturing a seat ring of a split volute of a water turbine includes the following steps:
a. integrally blanking the disc-shaped edges 1 and the compensation sections 2, integrally rolling and molding the disc-shaped edges 1 and the compensation sections 2, and then respectively cutting the disc-shaped edges 1 and the compensation sections into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece;
b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded;
c. and (3) pre-assembling the compensation joint 2 at the splitting surface 4 of the volute seat ring to complete the manufacture of the volute seat ring.
In the step a, the integral blanking of the disc-shaped edge 1 and the compensation joint 2 refers to the integral blanking of the disc-shaped edge 1 and the compensation joint 2 through a numerical control machine tool, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge 1 and the compensation joint 2 is reserved in the unfolding length direction, and the forming allowance is reserved.
The matching and cutting allowance is 50mm, and the forming allowance is 100 mm.
In the step a, the integral rolling forming of the disc-shaped edge 1 and the compensation joint 2 refers to the rolling forming through a rolling machine.
In the step b, 6mm of machining allowance is reserved on one side of the 3 surfaces of the two volute seat ring segments 3 before the two volute seat ring segments 3 are subjected to circle combination.
In the step b, the integral assembly and welding of the disc-shaped edges 1 at the split positions of the volute casing seat ring 3 means that the adjacent disc-shaped edges 1 are integrally assembled and welded, the process supports are arranged on the disc-shaped edges 1 at the two sides of the split surface 4, the welding deformation of the disc-shaped edges 1 is controlled, and the welding is completed.
After the welding is finished, the adjacent disc-shaped edges 1 are cut from the sectioning surfaces 4, the two volute casing seat ring sectioning surfaces 3 are separated, the volute casing seat ring sectioning surfaces 3 are subjected to furnace heat treatment, the surfaces of the volute casing seat ring sectioning surfaces 3 are machined, and the machining of the annular seam grooves of the adjacent disc-shaped edges 1 is finished.
The embodiment is a further preferred embodiment, simplifies the whole processing technology, realizes standardization, flow and standardization of the manufacturing process of the split type seat ring of the large-sized water turbine, reduces interference of human factors, and improves the processing efficiency and the processing effect.
Example 5
Referring to fig. 1, a method for manufacturing a water turbine split volute casing seat ring comprises the following steps:
a. integrally blanking the disc-shaped edges 1 and the compensation sections 2, integrally rolling and molding the disc-shaped edges 1 and the compensation sections 2, and then respectively cutting the disc-shaped edges 1 and the compensation sections into single pieces, wherein the adjacent disc-shaped edges 1 are an integral single piece;
b. the two volute seat ring segments 3 are fixed in a group circle lap joint mode, and then the disc-shaped edge 1 at the segment surface 4 of the volute seat ring is integrally assembled and welded;
c. and (3) pre-assembling the compensation joint 2 at the splitting surface 4 of the volute seat ring to complete the manufacture of the volute seat ring.
In the step a, the integral blanking of the disc-shaped edge 1 and the compensation joint 2 refers to the integral blanking of the disc-shaped edge 1 and the compensation joint 2 through a numerical control machine tool, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge 1 and the compensation joint 2 is reserved in the unfolding length direction, and the forming allowance is reserved.
The matching and cutting allowance is 50mm, and the molding allowance is 100 mm.
In the step a, the integral roll forming of the disc-shaped edge 1 and the compensation joint 2 is roll forming by a roll press.
In the step b, before the two volute seat ring segments 3 are subjected to circle combination, machining allowance of 7mm is reserved on one side of the 3 surfaces of the volute seat ring segments.
In the step b, the integral assembly and welding of the disc-shaped edges 1 at the split positions of the volute casing seat ring 3 means that the adjacent disc-shaped edges 1 are integrally assembled and welded, the process supports are arranged on the disc-shaped edges 1 at the two sides of the split surface 4, the welding deformation of the disc-shaped edges 1 is controlled, and the welding is completed.
After welding is finished, cutting the adjacent disc-shaped edges 1 from the split surfaces 4, separating the two volute seat ring split pieces 3, putting the volute seat ring split pieces 3 into a furnace for heat treatment, and then processing the surfaces of the volute seat ring split pieces 3 to finish the processing of the circular seam grooves of the adjacent disc-shaped edges 1.
In the step c, the compensation joint 2 is preassembled at the valving surface 4 of the volute seat ring, namely the allowance of the compensation joint 2 is removed, and the groove of the compensation joint 2 is processed consistently with the groove of the disc-shaped edge 1 and then connected.
The embodiment is the best implementation mode, in the step c, the compensation joint 2 is preassembled at the split surface 4 of the volute casing seat ring, namely, the allowance of the compensation joint 2 is removed, the groove of the compensation joint 2 is processed consistently with the groove of the disc-shaped edge 1 and then connected, and because the connection part of the compensation joint 2 and the disc-shaped edge 1 is the cut part of the same integral forming piece, the groove of the compensation joint 2 is processed consistently with the groove of the disc-shaped edge 1 and then connected, the generation of stagger can be effectively avoided, and the processing quality of the volute casing seat ring is guaranteed.
Claims (8)
1. A manufacturing method of a water turbine split volute casing seat ring is characterized by comprising the following steps:
a. integrally blanking the disc-shaped edges (1) and the compensation sections (2), integrally rolling and molding the disc-shaped edges (1) and the compensation sections (2), and then respectively cutting the disc-shaped edges into single pieces, wherein the adjacent disc-shaped edges (1) are an integral single piece;
b. the two volute seat ring segments (3) are fixed in a group circle lap joint mode, and then the disc-shaped edge (1) at the segment splitting surface (4) of the volute seat ring is integrally assembled and welded;
c. and pre-assembling the compensation joint (2) at the splitting surface (4) of the volute casing seat ring to complete the manufacture of the volute casing seat ring.
2. The method of claim 1 for manufacturing a turbine split volute receptacle ring, wherein: in the step a, the integral blanking of the disc-shaped edge (1) and the compensation joint (2) refers to the integral blanking of the disc-shaped edge (1) and the compensation joint (2) through a numerical control machine, the cutting allowance required by the preset assembly of the peripheries of the disc-shaped edge (1) and the compensation joint (2) is reserved in the unfolding length direction, and the forming allowance is reserved.
3. The method of claim 2 wherein said step of forming a turbine split volute receptacle ring comprises: the matching and cutting allowance is 50mm, and the forming allowance is 100 mm.
4. The method of claim 1 for manufacturing a turbine split volute receptacle ring, wherein: in the step a, the integral roll forming of the disc-shaped edge (1) and the compensation joint (2) is roll forming through a roll press.
5. The method of claim 1 for manufacturing a turbine split volute receptacle ring, wherein: in the step b, 5-7mm of machining allowance is reserved on one side of the surface of the volute seat ring split (3) before the two volute seat ring split (3) are subjected to circle combination.
6. The method of claim 1 for manufacturing a turbine split volute receptacle ring, wherein: in the step b, the integral assembly and welding of the disc-shaped edges (1) at the split positions of the volute seat ring (3) means that the adjacent disc-shaped edges (1) are integrally assembled and welded, process supports are arranged on the disc-shaped edges (1) on the two sides of the split surface (4), the welding deformation of the disc-shaped edges (1) is controlled, and the welding is completed.
7. The method of claim 6 wherein said step of forming a turbine split volute receptacle ring comprises: after the welding is finished, the adjacent disc-shaped edges (1) are cut from the split surfaces (4), the two volute casing seat ring split pieces (3) are separated, the volute casing seat ring split pieces (3) are subjected to furnace heat treatment, the surfaces of the volute casing seat ring split pieces (3) are processed, and the processing of the annular seam grooves of the adjacent disc-shaped edges (1) is finished.
8. The method of claim 1 for manufacturing a turbine split volute receptacle ring, wherein: in the step c, pre-assembling the compensation joint (2) at the valving surface (4) of the volute seat ring means that the allowance of the compensation joint (2) is removed, and the groove of the compensation joint (2) is processed consistently with the groove of the disc-shaped edge (1) and then connected.
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| US20160116072A1 (en) * | 2014-10-28 | 2016-04-28 | Fisher Controls International Llc | Choked Flow Valve With Clamped Seat Ring |
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| CN110977219A (en) * | 2019-12-13 | 2020-04-10 | 哈尔滨电机厂有限责任公司 | Pumped storage seat ring assembling and welding method |
| CN213870107U (en) * | 2020-09-24 | 2021-08-03 | 浙江迅和机械制造有限公司 | Hydraulic turbine seat ring structure |
| CN112922765A (en) * | 2021-04-13 | 2021-06-08 | 哈尔滨电机厂有限责任公司 | Manufacturing process method of split runner of large-scale impulse turbine |
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