CN103612082B - The process of large-sized water turbine field ring processing centering - Google Patents

Abstract

The invention discloses the process of a kind of large-sized water turbine field ring processing centering, when seat ring draws inspection with fixed guide vane center line for benchmark leveling, with fixed guide vane inscribed circle for benchmark determination seat ring center 0-0, be that benchmark draws lower ring plate inner circle processing line with 0-0, survey radius with the center of circle, draw the face processing line that heals up, seat ring milling heal up face time, heal up facing to machine tool chief axis, by horizontal line leveling workpiece, look for the face of healing up vertical with machine tool chief axis, process the face that heals up.The present invention have simple to operate, centering precision is high, ensure processing after group bowlder to heal up the advantages such as gap, face is little, the compressible production cycle, improve crudy.

Description

The process of large-sized water turbine field ring processing centering

Technical field

The present invention relates to the process of a kind of large-sized water turbine field ring processing centering.

Background technology

Seat ring is the basic components of reaction turbine, except bearing effect of water pressure, also bears whole unit and unit section concrete weight, requires enough strength and stiffness.Meanwhile, seat ring, as one of key reference in water turbine units installation, needs enough processing and assembly precision.Usually, turbine stay ring has 3 kinds of frame modes with distinguish situation by size, that is: adopt entirety not distinguish project organization mode for small unit, seat ring full-size is generally below 5 meters; Point 2 lobe project organization modes are adopted for medium-sized unit, seat ring full-size generally more than 5 meters, less than 8 meters; Large-scale machine set is considered to the technological requirements such as transport and lifting adopt point 4 lobe project organization modes.Along with emerging in large numbers successively of large-scale, large rubber good, the key parameter straight lines such as seat ring diameter, weight increase, there are 6 valve structures in turbine stay ring, and relative to previous 3 kinds of structure seat rings, face combination that 6 lobe seat rings need repeatedly draw inspection, milling is healed up, difficulty of processing is larger, and traditional processing mode cannot meet drawing technical requirement.Therefore, be necessary a kind of effectively controlled working cumulative errors of exploitation, organizing bowlder precision in seat ring factory can higher than the process of the large-sized water turbine field ring processing centering of standard-required.

The content of invention

The object of this invention is to provide one and effectively control cumulative errors, organizing bowlder precision in seat ring factory can higher than the process of the large-sized water turbine field ring processing centering of standard-required.

Technical scheme of the present invention is: a kind of process of large-sized water turbine field ring processing centering: 1) be just placed on face plate, six 1/6 lobe seat ring correspondences with fixed guide vane horizontal center line A-A for benchmark, by Workpiece leveling to 0.1mm;

2) with fixed guide vane inscribed circle Φ 1 for benchmark makes workpiece centre O-O;

3) with center line O-O for benchmark, draw inspection Φ 2, Φ 3, Φ 4, Φ 5 circle processing capacity, in lower ring plate plane draw circle line, horizontal line, determine the center of circle;

4) draw and heal up face processing line and see line, measure six lobe seat ring radiuses always time high accuracy spring scale must be used to draw chi, mark seat ring X-Y line, at face typewriting head (1-1), (2-2), (3-3), (4-4), (5-5), (6-6) of healing up, corresponding lobe is indicated the first, second, third, fourth, the 5th, the 6th lobe;

5) the opening value between two fixed guide vanes at the face place that heals up is checked;

6) check ring flat-plate, changeover portion grinds one's teeth situation, marking;

7) a 1/6 lobe seat ring is just being placed on boring table, is healing up facing to machine tool chief axis, by horizontal line leveling workpiece, looking for the face of healing up vertical with machine tool chief axis;

8) to heal up face by line milling, second, third lobe milling (2-2) is healed up face; First lobe milling 1-1 heals up face; Four, the 5th lobe milling (4-4) is healed up face; 6th lobe milling (5-5) is healed up face;

(9) second and third lobe is combined into 1/3 circle, fourth, fifth lobe is combined into 1/3 circle, first, six lobes wouldn't organize circle;

(10) draw inspection two 1/3 lobe seat rings, draw the face processing line and see line of healing up, draw (1-1) at the second lobe and to heal up face processing line, draw (5-5) at the 5th lobe and to heal up face processing line;

(11) milling two 1/3 lobe seat rings heal up face, and the second lobe milling (1-1) is healed up face, and the 5th lobe milling (5-5) is healed up face;

(12) first, second and third lobe is combined into 1/2 circle, fourth, fifth, six lobes are combined into 1/2 circle;

(13) draw inspection two 1/2 lobe seat rings, draw and heal up face processing line and see line;

(14) milling two 1/2 unprocessed faces that heal up of lobe seat ring;

(15) by described two 1/2 lobe seat ring composition full circle.

Instant invention overcomes traditional 2 lobes, 4 lobe seat rings repeatedly single-lobe processing to heal up face, organize the technical approach that cavetto flies the face of healing up again, avoid the shortcomings such as processing capacity is not enough, local deformation is large, the process-cycle is long, simultaneously, providing one can effective controlled working cumulative errors, guarantee that seat ring is combined into the precision after justifying, improve working (machining) efficiency, be easy to promote.

The beneficial effect that the present invention has:

1, the present invention is practical, easy and simple to handle, is convenient to plant operator and uses, can reduce the too many levels cycles such as assembling, machined.

2, the present invention adopts hydropower industry common tool and equipment, effectively controls cumulative errors, under saving cycle, the prerequisite that reduces costs, improves workpiece accuracy and quality.

3, thinking of the present invention is novel, is easy to transform, and is the machining reference of large-scale water turbine ring 6 lobe shape part (top cover, base ring, control loop, inner top cover etc.).

Accompanying drawing explanation

Fig. 1 seat ring draws inspection benchmark sketch

Fig. 2 seat ring lobe number mark and the face mark sketch that heals up

Detailed description of the invention

A process for large-sized water turbine field ring processing centering, comprises following processing step:

1) six 1/6 lobe seat ring correspondences are just being placed on face plate, with fixed guide vane horizontal center line A-A for benchmark, by Workpiece leveling to 0.2mm;

2) with fixed guide vane inscribed circle Φ 1 for benchmark makes workpiece centre O-O;

3) as shown in Figure 1, with center line O-O for benchmark, draw inspection Φ 2, Φ 3, Φ 4, Φ 5 circle processing capacity, lower ring plate plane is drawn circle line, horizontal line, determines the center of circle;

4) draw and heal up face processing line and see line, measure six lobe seat ring radiuses always time high accuracy spring scale must be used to draw chi, mark seat ring X-Y line, at face typewriting head 1-1,2-2,3-3,4-4,5-5, the 6-6 of healing up, corresponding lobe is indicated the first, second, third, fourth, the 5th, the 6th lobe, sees Fig. 2;

5) the opening value between two fixed guide vanes at the face place that heals up is checked;

6) check ring flat-plate, changeover portion grinds one's teeth situation, marking;

7) a 1/6 lobe seat ring is just being placed on boring table, is healing up facing to machine tool chief axis, by horizontal line leveling workpiece, looking for the face of healing up vertical with machine tool chief axis;

8) to heal up face by line milling, second, third lobe milling 2-2 heals up face; First lobe milling 1-1 heals up face; Four, the 5th lobe milling 4-4 heals up face; 6th lobe milling 5-5 heals up face;

(9) second and third lobe is combined into 1/3 circle, fourth, fifth lobe is combined into 1/3 circle, first, six lobes wouldn't organize circle;

(10) draw inspection two 1/3 lobe seat rings, draw the face processing line and see line of healing up, draw 1-1 at the second lobe and to heal up face processing line, draw 5-5 at the 5th lobe and to heal up face processing line;

(11) milling two 1/3 lobe seat rings heal up face, and the second lobe milling 1-1 heals up face, and the 5th lobe milling 5-5 heals up face;

(12) first, second and third lobe is combined into 1/2 circle, fourth, fifth, six lobes are combined into 1/2 circle;

(13) draw inspection two 1/2 lobe seat rings, draw and heal up face processing line and see line;

(14) milling two 1/2 unprocessed faces that heal up of lobe seat ring;

(15) by described two 1/2 lobe seat ring composition full circle.

Claims (1)

1. the process of large-sized water turbine field ring processing centering, is characterized in that:

1) six 1/6 lobe seat ring correspondences are just being placed on face plate, with fixed guide vane horizontal center line A-A for benchmark, by Workpiece leveling to 0.1mm;

2) with fixed guide vane inscribed circle Φ 1 for benchmark makes workpiece centre O-O;

3) with center line O-O for benchmark, draw inspection Φ 2, Φ 3, Φ 4, Φ 5 circle processing capacity, in lower ring plate plane draw circle line, horizontal line, determine the center of circle;

4) draw and heal up face processing line and see line, measure six lobe seat ring radiuses always time high accuracy spring scale must be used to draw chi, mark seat ring X-Y line, at face typewriting head (1-1), (2-2), (3-3), (4-4), (5-5), (6-6) of healing up, corresponding lobe is indicated the first, second, third, fourth, the 5th, the 6th lobe;

5) the opening value between two fixed guide vanes at the face place that heals up is checked;

6) check ring flat-plate, changeover portion grinds one's teeth situation, marking;

7) a 1/6 lobe seat ring is just being placed on boring table, is healing up facing to machine tool chief axis, by horizontal line leveling workpiece, looking for the face of healing up vertical with machine tool chief axis;

8) to heal up face by line milling, second, third lobe milling (2-2) is healed up face; First lobe milling 1-1 heals up face; Four, the 5th lobe milling (4-4) is healed up face; 6th lobe milling (5-5) is healed up face;

(9) second and third lobe is combined into 1/3 circle, fourth, fifth lobe is combined into 1/3 circle, first, six lobes wouldn't organize circle;

(10) draw inspection two 1/3 lobe seat rings, draw the face processing line and see line of healing up, draw (1-1) at the second lobe and to heal up face processing line, draw (5-5) at the 5th lobe and to heal up face processing line;

(11) milling two 1/3 lobe seat rings heal up face, and the second lobe milling (1-1) is healed up face, and the 5th lobe milling (5-5) is healed up face;

(12) first, second and third lobe is combined into 1/2 circle, fourth, fifth, six lobes are combined into 1/2 circle;

(13) draw inspection two 1/2 lobe seat rings, draw and heal up face processing line and see line;

(14) milling two 1/2 unprocessed faces that heal up of lobe seat ring;

(15) by described two 1/2 lobe seat ring composition full circle.