CN109909679B - Method for improving split seat ring opening precision - Google Patents
Method for improving split seat ring opening precision Download PDFInfo
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- CN109909679B CN109909679B CN201910303253.9A CN201910303253A CN109909679B CN 109909679 B CN109909679 B CN 109909679B CN 201910303253 A CN201910303253 A CN 201910303253A CN 109909679 B CN109909679 B CN 109909679B
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Abstract
The invention discloses a method for improving the opening precision of a split seat ring. The method is different from the conventional process in that: checking each part of the joint surface by using a hanging steel wire for perpendicularity after the processing of the circumferential joint surface of the split seat, and correcting the perpendicularity deviation of the joint surface by using a numerical control program to ensure the precision of the joint surface; 1/2 the seat ring is processed on a boring machine, a digital level gauge is placed on a boring box by utilizing the stroke precision of the boring machine, the opening measurement of the fixed guide vane of the 1/2 seat ring in the whole process is realized, and the reference scribing precision of the 1/2 seat ring is ensured; the whole seat ring utilizes a 360-degree rotary central column to measure and mark and examine the benchmark, thereby ensuring the benchmark uniformity of the whole seat ring and improving the benchmark marking and examining precision; the split seat ring is processed and combined with the datum plane, and the split seat ring is assembled and combined by taking the datum plane as a reference, so that the assembling and combining precision is improved. The invention has the advantages of simple size control process of the seat ring opening, controllable processing quality, high precision and the like.
Description
The technical field is as follows:
the invention discloses a process method for improving the size precision of a hydraulic opening of a water turbine valving seat ring.
Background art:
the seat ring is a main supporting part in a hydraulic turbine unit embedded component and is an important component of a hydraulic flow passage; the opening sizes of the upper ring plate and the lower ring plate of the seat ring are important sizes in hydraulic flow channels and non-processing sizes of the seat ring, and the guarantee of the size precision of the seat ring is of great significance for reducing unit vibration and guaranteeing smooth water flow.
The size of the hydraulic opening of the seat ring is formed after the seat ring is welded, but the large-sized seat ring is mostly in a split structure due to transportation limitation. Due to the integral processing and installation requirements, the split seat ring needs to be subjected to split processing, joint surface closing and combined assembly for multiple times. In the machining process, the requirements on the size of the hydraulic opening of the seat ring are different according to different requirements on the manufacturing precision of the unit. The traditional process lacks specific control measures for the seat ring opening and cannot ensure the requirement of high precision of the hydraulic opening size. Along with the improvement of the precision required by the size of the seat ring hydraulic opening by the hydroelectric generator set, the seat ring hydraulic opening needs to be controlled in the processing process, and the size of each petal seat ring hydraulic opening is kept in an ideal state after the original single petal seat ring is welded and before processing or meets the opening precision required by design after the split seat ring is processed and assembled into a whole for multiple times.
The split seat ring is formed by welding, and the accuracy of the opening size needs to be controlled in the split processing and combination, so that the identification of important factors influencing the hydraulic opening of the seat ring in the processing is very critical. The process method adopts specific process measures in the process of seat ring marking inspection, joint closing surface processing, seat ring assembly, seat ring alignment and the like, ensures the size precision of the hydraulic opening of the seat ring, meets the high-quality requirement of users on the size of the hydraulic opening of the seat ring, and finally achieves the effect of stable hydraulic operation of the unit.
The invention content is as follows:
the invention discloses a process method for improving the size precision of a hydraulic opening of a water turbine valving seat ring. The process method controls the size of the hydraulic opening of the seat ring after the split seat ring is processed, aligned, assembled and checked from the single-lobe joint close surface to finally form the integral seat ring, and adopts a series of specific process methods to ensure that the size of the hydraulic opening of the seat ring reaches the ideal state before processing or the opening precision value required by the final design after the original single-lobe welding.
The technical scheme is as follows:
A) the welded single-petal 1/4 seat ring (1) is placed on a boring machine platform, the joint closing surface faces a numerical control boring machine, the seat ring (1) is aligned and leveled according to a horizontal reference line (4) marked on a fixed guide vane (7) of the seat ring, and the reference horizontal deviation is ensured to be less than 0.50 mm;
B) the boring shaft (8) aligns the seat ring (1) according to a processing line AB marked on a joint surface of the seat ring, so that the processing line of the joint surface to be processed is perpendicular to the boring shaft (8), the horizontal reference lines (4) on all fixed guide vanes (7) of the seat ring (1) are rechecked from the upper half opening sizes H1 and H2 of the upper half opening size and the lower half opening size of the flow plane of the upper ring plate (14) and the lower ring plate (13), and after the opening sizes H1 and H2 are confirmed to be qualified, the joint surface is bored and milled again;
C) roughly milling a joint surface, leaving 2mm of allowance, hanging a steel wire (12) on a boring shaft (8) of a boring machine, measuring the horizontal distance M, N between the processed joint surface and the steel wire (12) by using an inner diameter ruler, and comparing numerical values;
D) moving a boring shaft (8) in the horizontal direction of a guide rail of the numerical control boring machine, measuring the horizontal distance M, N between the boring shaft and a steel wire (12) at different positions of a processed joint close surface, and comparing numerical values;
E) finely milling a joint surface by a boring machine, and processing high points to ensure that the numerical value difference of each point is not more than 0.10 mm;
F) hanging a steel wire (12) on a boring shaft (8) of a boring machine, measuring the horizontal distance between each point of the finish-machined joint surface and the steel wire (12) by using an inner diameter ruler, and comparing the measured values, wherein the difference of the numerical values of each point is not more than 0.10 mm;
G) processing a joint closing surface combined reference surface P on the upper plane of a lower ring plate (13) of the single-petal seat ring (1) by using a numerical control boring machine, wherein the width of the reference surface is 15mm, and the surface roughness is Ra3.2;
H) two 1/4 seat rings (1) are aligned according to a combined reference plane P of a joint surface and a round line, and form a 1/2 seat ring on a boring machine platform;
I) checking the gap of the joint closing surface by the combined 1/2 seat ring, and ensuring that the gap is less than 0.20 mm;
J) the combined 1/2 seat rings are placed on a boring machine platform, the joint closing surface faces to the boring machine, the horizontal reference line (4) is scribed again according to the height sizes H1 and H2 of the openings on the upper ring plate (14) and the lower ring plate (13) of the seat rings, and the seat rings (1) are aligned and leveled according to the scribed horizontal reference line (4), and the method comprises the following steps: a digital level gauge (11) is placed on a boring box (9) of a boring machine for checking, the machine tool moves along the direction of the horizontal guide rail stroke AD, the digital level gauge (11) is used for measuring 1/2 the sizes of upper and lower openings H1 and H2 of all upper ring plates (14) and lower ring plates (13) of a seat ring, and the horizontal reference deviation is less than 0.50 mm;
K) aligning according to a processing line AB-CD marked and detected on the joint surface, enabling the alignment to be vertical to a boring shaft (8) of a boring machine, and boring and milling the joint surface after the sizes of the upper opening H1 and the lower opening H2 are qualified;
l) roughly milling a joint surface by a boring machine, reserving 2mm of allowance, hanging a steel wire (12) on a boring shaft (8) of the boring machine, measuring the horizontal distance M, N between the processed joint surface and the steel wire (12) by using an inner diameter ruler, and comparing numerical values;
m) moving the boring shaft (8) along the direction of the guide rail of the machine tool, measuring the horizontal distance M, N between the boring shaft and the steel wire (12) at different positions of the processed joint close surface, and comparing the values;
n) finely milling a joint surface by a boring machine, and processing high points to ensure that the numerical value difference of each point is not more than 0.10 mm;
o) hanging a steel wire (12) on a boring shaft (8) of the boring machine, re-measuring the horizontal distance between the finish-machined joint surface and the steel wire (12) by using an inner diameter ruler, and comparing the measured values, wherein the difference of the values of all points is not more than 0.10 mm;
p) processing a combined reference plane P on an upper plane of a lower ring plate (13) of the 1/2 seat ring (1) along the direction of a joint closing plane from the excircle to the inner circle of the lower ring plate (13) by a boring machine, wherein the width of the reference plane is 15mm, and the surface roughness is Ra3.2;
q) aligning the two 1/2 seat rings according to the combined reference plane P of the joint surface and the processing circular line to form an integral seat ring on the assembly platform;
r) a central upright post (3) is arranged at the center of the integral seat ring (1), the central upright post (3) is fixed on a rotary workbench (5) which can rotate in a full circle of 360 degrees, an alloy steel scriber (6) is fixedly arranged on an extension cantilever (2) of the central upright post (3), the extension cantilever (2) and the scriber (6) are driven to rotate through the workbench (5) to measure, inspect and level a central reference line (4) of a fixed guide vane (7) of the integral seat ring (1), and the horizontal reference deviation is less than 0.50 mm;
s) after the horizontal accuracy of the center reference line of the fixed guide vane (7) of the seat ring is determined, the sizes of upper and lower openings H1 and H2 of an upper ring plate (14) and a lower ring plate (13) of the seat ring (1) are checked, and after the sizes of hydraulic upper and lower openings H1 and H2 of the integral seat ring (1) are confirmed to be qualified, subsequent vertical lathe machining is carried out.
The technical effects are as follows:
in the long-term use process of the boring machine, the stand column of the boring machine inevitably generates precision changes such as inclination and the like, so that the processing verticality deviation of the joint close surface of the workpiece is caused. The perpendicularity of the machined joint surface of the split seat ring is checked and corrected by the aid of the hanging steel wire, the steel wire is absolutely vertical to the ground level, the horizontal reference line of the seat ring and the steel wire are guaranteed to be perpendicular to each other, deviation of a measuring system is eliminated by measuring distance comparison between the joint surface and the steel wire, and reliability of measuring accuracy is guaranteed. Correcting the vertical processing deviation of the joint closing surface by using a numerical control program, ensuring the vertical precision of the joint closing surface, and ensuring the final seat ring combination reference level by controlling the processing precision of the joint closing surface;
according to the invention, 1/2 seat rings are processed on a boring machine, the stroke precision advantage of the boring machine is fully utilized, a digital level gauge measuring device is placed on a boring box, the measurement of openings of upper and lower ring plates of 1/2 seat rings in the whole process is realized, and the reference scribing precision of the seat rings 1/2 is ensured;
the invention utilizes a 360-degree rotary central column to measure and scratch the whole seat ring, thereby ensuring the uniform reference of the whole seat ring and improving the precision of the whole scratch of the reference; aiming at the characteristic of large assembling difficulty of the large split seat ring, a combined datum plane is processed at the combined surface of the large split seat ring, and the split seat ring is assembled and combined by taking the datum plane as a reference, so that the assembling and combining precision is improved.
The method can ensure that the dimensional tolerance of the opening of the seat ring reaches +/-3 mm, improve the tolerance precision by 2 to 3 times compared with the traditional tolerance requirement, and can completely meet the requirement of the dimensional precision of the running water power of the unit. The process method does not need to improve or use high-precision marking and detecting equipment and instruments, carries out marking and detecting control on the hydraulic opening of the seat ring by means of the stroke precision of the machine tool, and is convenient and easy to implement and reliable in precision.
The process method carries out whole-process processing process control on the hydraulic opening of the welding split seat ring in the processing, defines the control relation between the processing precision of the joint closing surface and the opening, gives reasonable precision requirements, and perfects the traditional split seat ring combination, marking inspection and joint closing surface processing methods.
Description of the drawings:
FIG. 1 is a view of 1/4 split seat ring seaming surface processing
FIG. 2 is a view of 1/2 processing of the seaming surface of the seat ring
FIG. 3 is a side view of 1/4, 1/2 seat ring seaming surface processing
FIG. 4 is a cross-sectional view of the entire seat ring
The specific implementation mode is as follows:
A) the welded single-clack 1/4 seat ring 1 is placed on a boring machine platform, the joint closing surface faces a numerical control boring machine, and the seat ring 1 is aligned and leveled according to three horizontal reference lines 4 marked on 1/4 seat ring fixed guide vanes 7, as shown in figure 1. The three horizontal reference lines are respectively positioned at the positions of the inner circle water outlet edges of the two fixed guide vanes 7 and the position of the outer circle water inlet edge of the middle fixed guide vane 7 on the joint surface. And (3) checking the leveling precision of the horizontal datum line by using a digital level gauge, and ensuring that the mutual deviation of the three datum horizontal lines is less than 0.50 mm.
B) The numerical control boring machine boring shaft 8 aligns the seat ring 1 according to a processing line AB marked on the upper plane of the lower joint closing surface ring plate 13, see fig. 3, so that a joint closing surface processing line to be processed of the seat ring is perpendicular to the boring machine boring shaft 8, and measures a horizontal reference line 4 on a fixed guide vane 7 of the seat ring 1 and upper and lower half opening sizes H1 and H2 from the upper ring plate 14 and the lower ring plate 13 on a flow plane, see fig. 4. Equally measuring 4 points at the inner circle position between every two adjacent fixed guide vanes 7 along the circumferential direction, confirming that the tolerance of the opening sizes H1 and H2 is not more than +/-3 mm, and boring and milling a joint surface;
C) roughly milling a joint surface on a numerical control boring machine platform, reserving 2mm allowance, and hanging a steel wire 12 with the diameter of 0.30mm on a boring spindle 8 of a boring machine spindle, wherein the distance between the steel wire 12 and the joint surface is about 200 mm. The horizontal distance M, N of the finished seaming surface from the wire 12 is measured with an inside diameter ruler, see fig. 3. Measuring a point at the measuring position from the highest point to the lowest point of the joint closing surface along the direction of the steel wire line every 500mm, and comparing numerical values;
D) moving the boring shaft 8 according to the horizontal direction of the guide rail of the numerical control boring machine, and hanging the steel wire once per 500mm span, wherein the hanging point position of the steel wire relative to the boring shaft is unchanged. Measuring the horizontal distance M, N between the seam-closing surface and the steel wire 12 at each processing position, respectively, as shown in figure 3, measuring a point every 500mm from the highest point to the lowest point of the seam-closing surface along the direction of the steel wire, and comparing the values;
E) the numerical value difference of each point is not more than 0.10mm, otherwise, the local high points are processed and removed by a numerical control finish milling program;
F) finely milling a joint closing surface by using a boring machine, and operating a high-point milling processing program of the joint closing surface;
G) hanging the steel wire 12 on the boring spindle 8 of the boring machine spindle, measuring the horizontal distance M, N between each position of the finished joint close surface and the steel wire 12 by using an inner diameter ruler, and comparing the measured values, as shown in figure 3;
H) the numerical value difference of each point is not more than 0.10mm, otherwise, the numerical control programming is continuously adopted for the local high points to carry out final surface finishing and milling and finish machining, and the processing precision of the joint closing surface is ensured to meet the requirements of combination assembly;
I) on the upper plane of the lower ring plate 13 of the single-petal seat ring 1, a numerical control boring machine is used for processing a joint closing plane combined reference plane P, the width of the reference plane is 15mm, and the surface roughness Ra3.2 is shown in figure 3;
J) the two 1/4 seat rings 1 are aligned according to the combined reference plane P of the joint surface and a round line to form a 1/2 seat ring on a boring machine platform, which is shown in figure 2;
K) checking the gap of the joint closing surface by the combined 1/2 seat ring, and ensuring that the gap is less than 0.20 mm;
l) the assembled 1/2 seat rings were placed right on the boring machine platform with the joint closing face facing the boring machine, see fig. 2. And (4) marking the horizontal reference line 4 again according to the opening height sizes H1 and H2 on the upper ring plate 14 and the lower ring plate 13 of the seat ring, and removing the original line. The total number of the horizontal reference lines is 4, and the horizontal reference lines are respectively positioned at the water outlet edge positions of the inner circles of the fixed guide vanes 7 on two sides of the annular seaming surface of each valve seat. According to the marked horizontal reference line 4, the seat ring 1 is aligned and leveled, and the method comprises the following steps: the digital level 11 is placed on the boring machine boring box 9 for inspection, see fig. 3. The machine tool moves along the direction of horizontal guide rail travel AD, and the sizes of upper and lower openings H1 and H2 of all upper ring plates 14 and lower ring plates 13 of the seat ring are measured 1/2 by using a digital level gauge 11, which is shown in figure 2. Every two adjacent fixed guide vanes 7 are equally divided and measured at 4 points along the circumferential direction at the inner circle position, and the horizontal reference deviation is less than 0.50 mm;
m) aligning according to a processing line AB-CD marked and detected by a joint surface to ensure that the processing line of the joint surface of the seat ring is vertical to a boring spindle 8 of a boring machine, and confirming that the dimensional tolerances of openings H1 and H2 of an upper ring plate and a lower ring plate are not more than +/-3 mm in figure 2, and then boring and milling the joint surface;
n) roughly milling a joint surface by a boring machine, reserving 2mm of allowance, and hanging a steel wire 12 with the diameter of 0.30mm on a boring shaft 8 of the boring machine, wherein the distance from the joint surface is about 200mm, as shown in figure 3. The horizontal distance M, N of the finished seaming surface from the wire 12 is measured with an inside diameter ruler. Measuring a point at the measuring position from the highest point to the lowest point of the joint closing surface along the direction of the steel wire line every 500mm, and comparing numerical values; o) moving the boring shaft 8 according to the horizontal direction of the guide rail of the machine tool, and hanging the steel wire once per 500mm span, wherein the hanging point position of the steel wire relative to the boring shaft is unchanged. Measuring the horizontal distance M, N between the seam-closing surface and the steel wire 12 at each processing position, respectively, as shown in figure 3, measuring a point every 500mm from the highest point to the lowest point of the seam-closing surface along the direction of the steel wire, and comparing the values;
p) the numerical value difference of each point should not exceed 0.10mm, otherwise, the local high point is processed and removed by a numerical control finish milling program;
q) finely milling a joint closing surface by using a boring machine, and operating a high-point milling processing program of the joint closing surface;
r) hanging the steel wire 12 on the boring spindle 8 of the boring machine, measuring the horizontal distance M, N between each position of the finished joint close surface and the steel wire 12 by using an inner diameter ruler, and comparing the measured values, as shown in figure 3;
s) the numerical value difference of each point is not more than 0.10mm, otherwise, the numerical control programming is continuously adopted for the local high point to carry out final surface finishing and milling and finish machining, and the processing precision of the joint closing surface is ensured to meet the requirements of combination and assembly;
t) processing a combined reference plane P on the upper plane of a lower ring plate 13 of the single-petal seat ring 1 along the direction of a joint closing plane from the outer circle to the inner circle of the lower ring plate 13 by a boring machine, wherein the width of the reference plane is 15mm, and the surface roughness is Ra3.2, which is shown in figure 3;
u)1/2 seat ring is aligned according to the combined reference plane P of the joint surface and the processing round line, and an integral seat ring is formed on the assembly platform;
v) a central upright 3 is mounted in the central position of the integral seat ring 1, see fig. 4. The central upright post 3 is fixed on a rotary workbench 5 which can rotate in a full circle of 360 degrees, an alloy steel scriber 6 is fixedly arranged on the lengthened cantilever 2 of the central upright post 3, the lengthened cantilever 2 and the scriber 6 are driven to measure, inspect and level the central reference line 4 of the fixed guide vane 7 of the integral seat ring 1 through the rotation of the workbench 5, and the deviation of the horizontal reference is less than 0.50 mm;
w) after the horizontal accuracy of the center datum line on the fixed guide vane 7 of the integral seat ring 1 is determined, checking the sizes of upper and lower openings H1 and H2 of an upper ring plate 14 and a lower ring plate 13 of the seat ring 1, as shown in figure 4, confirming that the size tolerance of the hydraulic upper and lower openings H1 and H2 of the integral seat ring 1 is not more than +/-3 mm, and then carrying out subsequent vertical turning on the seat ring.
By the method, the size precision of the whole hydraulic opening of the final seat ring is guaranteed, so that the size of the hydraulic opening after the seat ring is installed on a unit construction site meets the requirement of the hydraulic stability of the power station operation.
Equipment is needed:
numerical control boring machine
Digital level gauge
Wire
Inside micrometer
Center column
Rotary table
Alloy steel scriber
Claims (1)
1. A method for improving the opening precision of a split seat ring is characterized by comprising the following steps: the method comprises the following steps:
A) the welded single-petal 1/4 seat ring (1) is placed on a boring machine platform, the joint closing surface faces a numerical control boring machine, the seat ring (1) is aligned and leveled according to a horizontal reference line (4) marked on a fixed guide vane (7) of the seat ring, and the reference horizontal deviation is ensured to be less than 0.50 mm;
B) the boring shaft (8) aligns the seat ring (1) according to a processing line AB marked on a joint surface of the seat ring, so that the joint surface to be processed is perpendicular to the boring shaft (8), the distance between a horizontal reference line (4) on all fixed guide vanes (7) of the seat ring (1) and upper and lower half opening sizes H1 and H2 of a flow plane of an upper ring plate (14) and a lower ring plate (13) are rechecked, and after the opening sizes H1 and H2 are confirmed to be qualified, the joint surface is bored and milled;
C) roughly milling a joint surface, leaving 2mm of allowance, hanging a steel wire (12) on a boring shaft (8) of a boring machine, measuring the horizontal distance M, N between the processed joint surface and the steel wire (12) by using an inner diameter ruler, and comparing numerical values;
D) moving a boring shaft (8) in the horizontal direction of a guide rail of the numerical control boring machine, measuring the horizontal distance M, N between the boring shaft and a steel wire (12) at different positions of a processed joint close surface, and comparing numerical values;
E) finely milling a joint surface by a boring machine, and processing high points to ensure that the numerical value difference of each point is not more than 0.10 mm;
F) hanging a steel wire (12) on a boring shaft (8) of a boring machine, measuring the horizontal distance between each point of the finish-machined joint surface and the steel wire (12) by using an inner diameter ruler, and comparing the measured values, wherein the difference of the numerical values of each point is not more than 0.10 mm;
G) processing a joint closing surface combined reference surface P on the upper plane of a lower ring plate (13) of the single-petal seat ring (1) by using a numerical control boring machine, wherein the width of the reference surface is 15mm, and the surface roughness is Ra3.2;
H) two 1/4 seat rings (1) are aligned according to a combined reference plane P of a joint surface and a round line, and form a 1/2 seat ring on a boring machine platform;
I) checking the gap of the joint closing surface by the combined 1/2 seat ring, and ensuring that the gap is less than 0.20 mm;
J) the combined 1/2 seat rings are placed on a boring machine platform, the joint closing surface faces to the boring machine, the horizontal reference line (4) is scribed again according to the height sizes H1 and H2 of the openings on the upper ring plate (14) and the lower ring plate (13) of the seat rings, and the seat rings (1) are aligned and leveled according to the scribed horizontal reference line (4), and the method comprises the following steps: a digital level gauge (11) is placed on a boring box (9) of a boring machine for checking, the machine tool moves along the direction of the horizontal guide rail stroke AD, the digital level gauge (11) is used for measuring 1/2 the sizes of upper and lower openings H1 and H2 of all upper ring plates (14) and lower ring plates (13) of a seat ring, and the horizontal reference deviation is less than 0.50 mm;
K) aligning according to a processing line AB-CD marked and detected on the joint surface, enabling the alignment to be vertical to a boring shaft (8) of a boring machine, and boring and milling the joint surface after the sizes of the upper opening H1 and the lower opening H2 are qualified;
l) roughly milling a joint surface by a boring machine, reserving 2mm of allowance, hanging a steel wire (12) on a boring shaft (8) of the boring machine, measuring the horizontal distance M, N between the processed joint surface and the steel wire (12) by using an inner diameter ruler, and comparing numerical values;
m) moving the boring shaft (8) along the direction of the guide rail of the machine tool, measuring the horizontal distance M, N between the boring shaft and the steel wire (12) at different positions of the processed joint close surface, and comparing the values;
n) finely milling a joint surface by a boring machine, and processing high points to ensure that the numerical value difference of each point is not more than 0.10 mm;
o) hanging a steel wire (12) on a boring shaft (8) of the boring machine, re-measuring the horizontal distance between the finish-machined joint surface and the steel wire (12) by using an inner diameter ruler, and comparing the measured values, wherein the difference of the values of all points is not more than 0.10 mm;
p) processing a combined reference plane P on an upper plane of a lower ring plate (13) of the 1/2 seat ring (1) along the direction of a joint closing plane from the excircle to the inner circle of the lower ring plate (13) by a boring machine, wherein the width of the reference plane is 15mm, and the surface roughness is Ra3.2;
q) aligning the two 1/2 seat rings according to the combined reference plane P of the joint surface and the processing circular line to form an integral seat ring on the assembly platform;
r) a central upright post (3) is arranged at the center of the integral seat ring (1), the central upright post (3) is fixed on a rotary workbench (5) which can rotate in a full circle of 360 degrees, an alloy steel scriber (6) is fixedly arranged on an extension cantilever (2) of the central upright post (3), the extension cantilever (2) and the scriber (6) are driven to rotate through the workbench (5) to measure, inspect and level a central reference line (4) of a fixed guide vane (7) of the integral seat ring (1), and the horizontal reference deviation is less than 0.50 mm;
s) after the horizontal accuracy of the center reference line of the fixed guide vane (7) of the seat ring is determined, the sizes of upper and lower openings H1 and H2 of an upper ring plate (14) and a lower ring plate (13) of the seat ring (1) are checked, and after the sizes of hydraulic upper and lower openings H1 and H2 of the integral seat ring (1) are confirmed to be qualified, subsequent vertical lathe machining is carried out.
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| CN111922278B (en) * | 2020-08-13 | 2022-01-14 | 哈尔滨电机厂有限责任公司 | Process method for riveting fan blades of collector ring fan of generator rotor |
| CN112935727B (en) * | 2021-02-05 | 2023-05-02 | 一重集团(黑龙江)重工有限公司 | Split type lower ring machining method |
| CN114473377B (en) * | 2022-01-05 | 2023-05-26 | 东方电气集团东方电机有限公司 | Manufacturing method of split type volute seat ring of water turbine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7520058B1 (en) * | 2006-03-30 | 2009-04-21 | Stuller, Inc. | Method for enlarging a ring |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2928282A1 (en) * | 2008-03-05 | 2009-09-11 | Cmw Const Mecaniques Des Vosge | PROCESS FOR PRODUCING PLATES OF METAL, ALONE OR IN HOMOGENEOUS ALLOYS, BY CENTRIFUGATION |
| CN103612082B (en) * | 2013-11-22 | 2015-11-18 | 哈尔滨电机厂有限责任公司 | The process of large-sized water turbine field ring processing centering |
| CN105215640A (en) * | 2015-11-04 | 2016-01-06 | 哈尔滨电机厂有限责任公司 | Large-scale seat ring special plane technological method for processing |
| CN105328398B (en) * | 2015-11-10 | 2017-09-26 | 中信重工机械股份有限公司 | A kind of processing method of the valve cylinder faying face of large-sized grinder three |
| CN106181259B (en) * | 2016-08-15 | 2018-07-13 | 哈尔滨电机厂有限责任公司 | Big high size list upper ring plate split-type seat ring building site processing method |
| CN108044314B (en) * | 2017-12-13 | 2019-12-03 | 重庆水轮机厂有限责任公司 | A kind of Francis turbine divides semi spiral case processing technology |
| CN108608162A (en) * | 2018-06-26 | 2018-10-02 | 沈阳透平机械股份有限公司 | A kind of processing method of the closed guide vane of centrifugal compressor inner casing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7520058B1 (en) * | 2006-03-30 | 2009-04-21 | Stuller, Inc. | Method for enlarging a ring |
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