Method for installing and adjusting guide vane of bulb turbine

Abstract

The present application belongs to the technical field of water turbine equipment installation, and particularly relates to a method for installing and adjusting a guide water mechanism of a bulb tubular turbine. The method comprises the following steps: S1, assembling an outer water distribution ring; S2, installing a sleeve; S3, installing guide vanes and a guide vane arm; S4, installing an inner water distribution ring; S5, installing a guide vane lower shaft; S6, installing and adjusting a control ring; S7, installing a spring connecting rod; S8, assembling a guide vane operating mechanism; S9, adjusting a guide vane end surface gap; S10, adjusting a guide vane vertical surface gap; and S11, reinforcing the guide water mechanism. The present application adds a set of steel structure reinforcing devices and a set of hoisting anti-impact devices between the inner and outer water distribution rings, ensures that technical parameters do not change due to hoisting, improves the stability and safety of the overall hoisting and turning over of the equipment after assembly, reduces the deformation damage to the equipment body caused by the impact force generated during the turning over process, and shortens the adjustment period after the guide water mechanism is in place.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water turbine equipment installation, and particularly relates to a method for installing and adjusting a guide mechanism of a bulb tubular turbine. BACKGROUND

[0002] The guide mechanism of the tubular turbine is the core part of the turbine, which is generally assembled by an outer water distribution ring, an inner water distribution ring, a guide vane, a control ring, a pressure ring, a sleeve, a guide vane arm, a transmission mechanism and the like. The existing installation method does not consider that the equipment has large size and heavy weight. After the equipment is assembled, the stability and safety are poor when the equipment is hoisted by turning over, and the equipment is easy to deform, which causes the change of technical parameters and does not meet the requirements of the specification. In the actual turning over operation process, when the center of gravity changes to a critical state, a large impact force will occur. Such impact may cause very serious consequences, such as breaking of the sling, and the car and the trolley are separated from the track. SUMMARY

[0003] In view of the problems in the prior art, the present application provides a method for installing and adjusting a guide mechanism of a bulb tubular turbine, and specifically discloses the following technical scheme:

[0004] A method for installing and adjusting a guide mechanism of a bulb tubular turbine, comprising the following steps:

[0005] S1, assembly of the outer water distribution ring: combine the four-petal outer water distribution ring into a whole on the flat ground in the installation room, and the upstream flange face is downward during the combination;

[0006] S2, sleeve installation: clean the sleeve and the shaft hole of the outer water distribution ring thoroughly before installation, pre-assemble the sleeve and the guide vane shaft head, then hoist the sleeve, and press the sleeve into the guide vane hole;

[0007] S3, the guide vane and the guide vane arm installation: before the guide vane installation, first put the inner water distribution ring into the outer water distribution ring, hoist the outer water distribution ring and place it on the eight supporting piers provided by the factory, put the wedge plate on the supporting piers, adjust the outer water distribution ring to be horizontal, install the rectangular ring on the guide vane sleeve, then hoist the guide vane by the electric hoist of the bridge machine, and adjust the height and angle of the guide vane by the hand hoist, so that the big head of the guide vane is inclined upward and forms a 30° angle with the horizontal line, adjust the guide vane shaft head to be concentric with the sleeve, align and insert into the sleeve, screw the full tooth long screw on the center screw hole of the guide vane shaft head, keep the guide vane in the full closing position, tighten the nut on the long screw, pull the guide vane into the sleeve shaft hole, after the insertion of one piece of guide vane, hang a hand hoist above the corresponding guide vane to pull the guide vane, and support the small head of the guide vane with a wooden square, then loosen the hook of the electric hoist of the bridge machine; hoist the corresponding guide vane arm, clean the guide vane shaft head and the guide vane arm, apply lubricating grease, adjust the pin hole of the guide vane shaft head to match the pin hole of the guide vane arm by the guide vane wrench, then punch the half key, fix the guide vane arm, install the end cover, tighten the guide vane end cover bolt, adjust and pull the guide vane by the bolt and nut on the sleeve, so that the gap between the guide vane and the outer water distribution ring is 0.5mm, tighten the bolt between the end cover and the guide vane, and fix the guide vane, then remove the hand hoist; the remaining 15 pieces of guide vanes are inserted and installed according to the same scheme;

[0008] S4, the inner water distribution ring installation: clean the rust paint and grease on the inner water distribution ring guide vane hole, hoist the inner water distribution ring and place it on the six supporting piers provided by the factory, put the wedge plate on the supporting piers, adjust the inner water distribution ring to be horizontal, move the inner water distribution ring to adjust the center of the inner water distribution ring and the outer water distribution ring, adjust the height difference between the flanges of the inner water distribution ring and the outer water distribution ring by the wedge plate on the supporting piers of the outer water distribution ring and the inner water distribution ring;

[0009] S5, the guide vane lower shaft installation: clean the guide vane lower shaft and the lower shaft sleeve, adjust the guide vane lower shaft sleeve to be aligned with the inner water distribution ring shaft hole by the jack, install the O-ring on the lower shaft, apply lubricating grease, knock the lower shaft sleeve with a copper rod, install the guide vane lower shaft in place by the three long bolts, install the bolt and tighten it, and finally install the lower shaft plug and the gasket;

[0010] S6. Installation and Adjustment of the Control Ring: Clean the ball bearing grooves of the outer water distribution ring and the control ring, then assemble the control ring. During assembly, weld several temporary supports evenly spaced on the outer water distribution ring of the guide vane, and install screw jacks on them to adjust the control ring. Before the control ring is fitted into the guide ring, install felt strips on the packing grooves on both sides of the ball groove on the outer water distribution ring flange and apply grease. Hoist the control ring onto the screw jacks on the temporary supports and assemble it into a complete circle. Apply grease to the ball groove and install the steel balls and ball bearing brackets. Install the pressure ring, drive in the pressure plate pins, and tighten the entire pressure ring onto the control ring. Then loosen the tightening screws and use the bolts to lift the entire pressure ring. Install two hand chain hoists on the downstream flange of the external water distribution ring and symmetrically pull them to observe whether the control ring can be rotated. If the control ring cannot be rotated, continue to lift the pressure ring until the control ring rotates flexibly. Install several plugs and remove the jacks and temporary supports. Check whether the guide vanes are fully open and fully closed according to the markings made by the manufacturer. Finally, close the control ring to the fully closed position.

[0011] S7. Spring connecting rod installation: Pull the guide vane arm with a hand chain hoist until the distance from the guide vane arm shaft hole to the control ring lug hole is 800mm. Install the guide vane safety connecting rod. After the connecting rod is installed, adjust the special stud so that the stud ball is 5mm away from the guide vane arm. Measure and adjust the distance between the two pins of the spring connecting rod to 800mm. Then install the spring connecting rods in place according to their numbers. Measure the distance between the two pin holes of the spring connecting rod and record it.

[0012] S8. Assembly of guide vane operating mechanism: Close all guide vanes. Align the sealing edges of two evenly distributed pairs of guide vanes with the full-close line on the inner surface of the outer water distribution ring. Adjust the remaining guide vanes according to the full-close line of the initial four guide vanes and make them consistent. Fix the control ring in the full-close position so that the full-close mark on the control ring is consistent with the mark on the outer water distribution ring. Measure the distance between the two pin holes on the safety linkage. Adjust the distance by using the screw thread. Finally, install the connecting pin between the guide vane arm and the linkage, and between the linkage and the control ring.

[0013] S9. Guide vane end face clearance adjustment: Measure the end face clearance of the guide vanes, measure the total clearance of each guide vane, and analyze whether the upper and lower bearings of the guide vanes are concentric after measurement. If most of the guide vanes are not concentric and are biased to one side, the inner water distribution ring of the guide vane needs to be rotated and adjusted. Finally, the clearance on one side of the guide vane end face is made equal by the four adjusting bolts on the sleeve.

[0014] S10. Guide vane vertical clearance adjustment: Measure the vertical clearance of the guide vanes, initially adjust the vertical clearance of the guide vanes through the guide vane spring connecting rod, check the vertical clearance of the guide vanes with a feeler gauge, and measure and adjust again after the water guiding mechanism is hoisted into place. The final adjusted vertical clearance of the guide vanes should meet the manufacturer's design requirements and be recorded.

[0015] S11, the reinforced water guide mechanism: on-site increase a set of steel structure reinforcement device and a set of lifting anti-impact device, adopt connecting frame to connect and fix the inner and outer water distribution ring into a whole, weld 16 steel plates on the big and small heads of the X and Y direction four guide vanes and the inner and outer water distribution ring respectively, so that the outer water distribution ring, guide vane and inner water distribution ring are connected into a whole, and weld the lifting anti-impact device on the connecting frame.

[0016] Further, in step S1, before the combination of the outer water distribution ring, a sealing rubber strip is loaded on the combination surface, sealing glue is applied, the rubber strip is 10mm longer than the joint flange, the outer water distribution ring is combined according to the number marked by the manufacturer, the combination screws are tightened, and the dowel pins are tightened, after the outer water distribution ring is combined, the diameter of the center processing line of the downstream flange bolt hole is checked, whether the measurement data is consistent with the design value is determined, the sleeve is removed from the outer water distribution ring for cleaning and inspection, attention is paid to marking the number when disassembling, then the assembled outer water distribution ring is hoisted and placed on the eight supporting piers provided by the manufacturer to adjust the level, the X and Y direction marks made by the manufacturer are re-measured, and the record is made.

[0017] Further, in step S2, before the sleeve is pressed into the guide vane hole, the cooperation degree and rotation flexibility of the sleeve and the guide vane shaft head are checked, and after the check meets the requirements, the O-shaped sealing ring is installed on the guide vane sleeve and the lubricating grease is applied on the guide vane hole.

[0018] Further, in step S3, 0.4-0.6mm thick red copper sheets are placed between the guide vanes and the outer water distribution ring.

[0019] Further, in step S4, under the premise that the re-measured pipe-shaped seat related measuring points meet the requirements, the wedge plate on the inner water distribution ring supporting pier is adjusted so that the distance between the upstream side flanges of the inner and outer water distribution rings is 870mm, and if the distance between the downstream side flanges of the inner and outer cones of the re-measured pipe-shaped seat exceeds the requirement, the distance between the two upstream side flanges of the inner and outer water distribution rings is adjusted according to the distance between the downstream side flanges of the inner and outer cones of the actually measured pipe-shaped seat.

[0020] Further, in step S6, after the control ring is combined into a whole circle, the jack is adjusted so that the control ring steel ball groove edge is not in contact with the outer water distribution ring steel ball groove edge, the gap between the control ring and the outer water distribution ring is checked, and whether the control ring steel ball groove and the outer water distribution ring steel ball groove are on the same horizontal line is checked, otherwise the jack on the supporting pier is adjusted.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] The application adds a set of steel structure reinforcing device and a set of hoisting anti-impact device between the inner and outer water distribution rings, ensures that the technical parameters do not change due to hoisting, improves the stability and safety of the overall hoisting and turning of the assembled equipment, reduces the deformation damage to the equipment body caused by the impact force generated in the turning process, and shortens the adjustment period after the water guide mechanism is in place. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Assembling diagram of the outer water distribution ring.

[0024] Figure 2 Inserting and assembling diagram of the guide vane.

[0025] Figure 3 Installing diagram of the guide vane wall.

[0026] Figure 4 Temporary support pier and jack arrangement sectional view.

[0027] 1-outer water distribution ring, 2-inner water distribution ring, 3-guide vane, 4-guide vane installation tool, 5-sleeve, 6-guide vane arm, 7-split key, 8-end cover, 9-steel ball, 10-screw jack. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0029] EMBODIMENT

[0030] REFERENCE Figures 1-4 A bulb tubular turbine water guide mechanism installation and adjustment method, comprising the following steps:

[0031] (1) The assembly of the outer water distribution ring: The matching surface of the outer water distribution ring 1 and the guide vane 3 is a spherical surface with a radius of SR5470 mm. Sixteen guide vane shaft holes are provided on the outer water distribution ring, which are equally distributed at an angle of 60° with the shaft line of the unit, and four pressure measuring heads are provided for measuring the water pressure in the outer water distribution ring behind the guide vane. The outer water distribution ring is divided into four parts. The four parts of the outer water distribution ring are combined into a whole on the flat ground in the installation room, with the flange surface on the upstream side facing downward, the outer cone + Y direction on the upstream side of the installation room, and a Φ16 sealing rubber strip is installed on the combination surface before the combination of the outer water distribution ring, and sealing glue is applied. The rubber strip protrudes from the joint flange by about 10 mm. When combining, care should be taken to avoid collision. When the outer water distribution ring is combined, it should be combined according to the number marked by the manufacturer, and the joint flange should not be forcibly adjusted. Tighten the combination screws and tighten the pins at the same time. The gap between the combination joints cannot pass the 0.05 mm plug gauge check, and the joint flange should be less than 0.1 mm.

[0032] After the outer water distribution ring is combined, check the diameter of the center processing line of the downstream flange bolt hole (design φ7950 mm), and check whether the measured data is consistent with the design value, and make a good record;

[0033] Remove the sleeve 5 from the outer water distribution ring for cleaning and inspection. Pay attention to the numbering when disassembling. Then hoist the assembled outer water distribution ring and place it on the eight 1260 mm high support piers provided by the manufacturer to adjust the level. Recheck the X and Y direction marks made by the manufacturer and make a good record.

[0034] Measurement record table: parallelism and distance between the upstream flange surfaces of the guide vane inner and outer water distribution rings.

[0035] (2) Sleeve installation: Before installation, the sleeve and the outer water distribution ring shaft hole are thoroughly cleaned. The sleeve is pre-assembled with the guide vane shaft head according to the number. Check the fit and rotation flexibility of the sleeve and the guide vane shaft head. After meeting the requirements, install O-shaped sealing ring 383x7.0 on the guide vane sleeve and lubricate the guide vane hole. Hoist the sleeve according to the number, and press the sleeve into the guide vane hole with four M24x100 bolts.

[0036] (3) Installation of guide vane and guide vane arm: the guide vane and the center line of the unit form an angle of 60°, and the rotation angle of the guide vane ranges from 0° to 85°. Before the installation of the guide vane, the inner distribution ring 2 is hoisted into the outer distribution ring, the outer distribution ring is hoisted and placed on the eight 1260mm high supporting piers provided by the factory, the supporting piers are provided with wedge plates, the outer distribution ring is adjusted to be horizontal, a rectangular ring is installed on the guide vane sleeve, then the guide vane is hoisted by the electric hoist of the bridge machine in a three-point lifting manner, and the height and angle of the guide vane are adjusted by using the hand hoist, so that the large head of the guide vane is inclined upward and forms an angle of 30° with the horizontal line, the guide vane shaft head is adjusted to be concentric with the sleeve, the guide vane is inserted into the sleeve after being aligned, an M42 full tooth long screw is screwed into the center hole of the guide vane shaft head, in order to facilitate the installation of the inner distribution ring, a 0.4-0.6mm thick copper sheet is placed between the guide vane and the outer distribution ring, the guide vane is kept in the full closing position, the self-made guide vane installation tool 4 is used, the nut on the long screw is tightened, the guide vane is pulled into the sleeve hole, attention should be paid to not damaging the shaft head seal, after one piece of guide vane is installed, a 2t hand hoist is hung above the corresponding guide vane (the flange surface of the water guide mechanism) to pull the guide vane, and the small head of the guide vane is supported by a wooden square, then the hooks on the electric hoist of the bridge machine are loosened;

[0037] The corresponding number of guide vane arms 6 is hoisted, the shaft head and the guide vane arm are cleaned and lubricated, after the pin hole of the guide vane shaft head is adjusted to be consistent with the pin hole of the guide vane arm by using the guide vane wrench, the half key 7 is driven in to fix the guide vane arm, the end cover 8 is installed, the guide vane end cover bolt M42x120 is tightened, the sleeve bolt M24x2x100, the sleeve nut M24x2 and the sleeve bolt M24x100 are used to adjust and pull the guide vane, so that the gap between the guide vane and the outer distribution ring is about 0.5mm, the bolt between the end cover and the guide vane is tightened, the guide vane is fixed, the hand hoist is removed, and the remaining 15 pieces of guide vane are installed according to the same scheme.

[0038] (4) Installation of inner distribution ring: the inner distribution ring and the outer distribution ring together form a flow channel, the matching surface of the inner distribution ring and the guide vane is a spherical surface with a radius of SR2780mm, the spherical surface is uniformly provided with 16 guide vane lower shaft holes which form an angle of 60° with the center line of the main shaft, a fan-shaped plate is arranged at the lower part of the inner distribution ring, which is a supporting part of the water guide bearing, and four pressure measuring heads are arranged to measure the water pressure outside the inner distribution ring behind the guide vane, the inner distribution ring is an integral part.

[0039] Under the premise that the relevant measuring points of the tubular seat meet the requirements, the wedge plates on the supporting piers of the inner distribution ring are adjusted to make the distance between the upstream flanges of the inner and outer distribution rings be 870mm, if the distance between the downstream flanges of the inner and outer cones of the tubular seat exceeds the requirement, the distance between the two flanges of the upstream side of the inner and outer distribution rings is adjusted according to the actually measured distance between the downstream flanges of the inner and outer cones of the tubular seat.

[0040] Clean the anti-rust paint and grease on the inner water distribution ring guide vane hole, and hang the inner water distribution ring on the six 390mm high supports provided by the factory. Place the wedge plate on the support and adjust the levelness of the inner water distribution ring. Hang the piano wire and plumb bob with the X and Y points of the outer water distribution ring as the reference. At the same time, mark the X and Y points on the upstream side of the inner water distribution ring to facilitate the alignment of the guide vane and the inner cone during hoisting. Move the inner water distribution ring to adjust the center of the inner and outer water distribution rings. Use the wedge plate on the outer water distribution ring and the inner water distribution ring support to adjust the height difference between the flanges of the inner and outer water distribution rings to meet the requirements of the drawings. After adjusting the distance relative to the upstream flange, remove the copper sheet between the guide vane and the outer water distribution ring. After adjustment, make measurement records;

[0041] Measurement record table: parallelism and distance between the upstream flanges of the inner and outer water distribution rings of the guide vane.

[0042] (5) Installation of guide vane lower shaft: clean the guide vane lower shaft and lower shaft sleeve. Adjust the guide vane lower shaft sleeve and the inner water distribution ring shaft hole with the jack. Install one O-ring 188x7mm and one O-ring 140x7.0mm on the lower shaft. Apply lubricating grease. Lightly tap the lower shaft sleeve with a copper rod. If necessary, install the guide vane lower shaft in place with three long bolts. Install the bolt M24x70 and tighten it. Finally, install the lower shaft plug M14x1.5 and the washer Φ23 / Φ13.

[0043] (6) Installation and adjustment of control ring: The control ring is divided into two parts, with 16 small earring holes evenly distributed on it, forming a transmission mechanism with the connecting rod and guide vane arm. The control ring is installed on the outer side of the downstream flange of the outer water distribution ring, and uses rolling friction between the control ring and the outer water distribution ring.

[0044] Clean the ball bearing grooves of the outer water distribution ring and the control ring. Check that the groove surface at the joint of the outer water distribution ring is not misaligned and that the lubricating oil hole in the groove is unobstructed. Then assemble the control ring to ensure that the ball bearing groove is not misaligned and that the assembly surface screws are tightened.

[0045] During assembly, evenly weld 8 temporary supports (steel pipes or channel steels) on the outer water distribution ring of the guide vane. Place the screw jack (16T) on top to adjust the control ring. The assembly position of the control ring is about 2mm lower than the design. Pay attention to the fact that the jack needs to be tied firmly with strong iron wire and connected to a reliable hanging point to prevent falling and injuring people.

[0046] Before the control ring is inserted into the guide ring, install a felt strip in the packing groove on both sides of the steel ball groove on the outer water distribution ring flange and apply lubricating grease.

[0047] The control ring is assembled into a whole circle by placing it on the screw jacks 10 on the temporary support piers, the jacks are adjusted so that the edges of the steel ball grooves on the control ring and the outer distribution ring are not misaligned, the gap between the control ring and the outer distribution ring is checked, and whether the steel ball grooves on the control ring and the outer distribution ring are on the same horizontal line is checked, otherwise the jacks on the support piers are adjusted, lubricating grease is applied in the grooves, 260 Φ50 steel balls 9 and ball holders are installed, a compression ring is installed, and a compression plate pin is installed;

[0048] The compression ring is tightened on the control ring, then the tightening screws are loosened, the compression ring is lifted by the bolts M24x80, and 2 sets of 3-ton hand-operated hoists are installed on the flanges downstream of the outer distribution ring through lifting rings to symmetrically pull and observe whether the control ring can rotate, if the control ring cannot rotate, the compression ring is continuously lifted until the control ring rotates smoothly, 24 screw plugs M14x1.5 are installed, and the jacks and temporary supports are removed, the guide vane is checked to see whether it is consistent with the mark made by the manufacturer when it is fully open and fully closed, and finally the control ring is closed to the fully closed position.

[0049] (7) Spring link installation: the guide vane arm is pulled by the hand-operated hoist, the distance between the guide vane arm shaft hole and the control ring ear hole is 800 mm, the guide vane safety link is installed, after the link is installed, the special stud is adjusted so that the stud spherical surface is about 5 mm away from the guide vane arm, the distance between the two pin shafts of the spring link is also measured and adjusted to 800 mm, then the spring link is installed in place according to the corresponding numbers, the distance between the two pin holes of the spring link is measured, and a record is made.

[0050] (8) Guide vane operating mechanism assembly: the guide vanes are fully closed, the evenly distributed 2 pairs of guide vane sealing edges are taken to be consistent with the full-closed line on the inner surface of the outer distribution ring, the remaining guide vanes are adjusted according to the full-closed line of the initial 4 guide vanes and made consistent, the control ring is fixed at the full-closed position, the full-closed mark on the control ring is made consistent with the mark on the outer distribution ring, the distance between the two pin holes of the safety link is measured, the distance can be adjusted by a screw clamp, and finally the connecting pins between the guide vane arm and the link, and the link and the control ring are installed.

[0051] (9) Guide vane end face gap adjustment: the end face gap of the guide vanes is measured, the total gap of each guide vane is measured as a whole, after the measurement, whether the upper and lower bearings of the guide vanes are concentric is analyzed, if most of the guide vanes are not concentric and are all biased to one side, the inner distribution ring of the guide vane needs to be rotated for fine adjustment, and finally the four adjusting bolts on the sleeve are used to make the single-sided gap of the guide vane end face equal.

[0052] (10) Adjusting the guide vane vertical gap: measure the guide vane vertical gap, adjust the guide vane vertical gap through the guide vane spring connecting rod, check the guide vane vertical gap with the feeler gauge, when the guide vane is fully closed, the local gap within the guide vane height of 671mm is allowed to be not more than 0.15mm, the rest range shall not pass the 0.05mm feeler gauge, and the record shall be made, and the measurement and adjustment shall be carried out again after the water guide mechanism is hoisted into place; the finally adjusted guide vane vertical gap shall meet the design requirements of the manufacturer, and the record shall be made.

[0053] (11) Reinforcing the water guide mechanism: one set of steel structure reinforcing device and one set of hoisting anti-impact device are added on site, the inner and outer water distribution rings are connected and fixed into a whole through the connecting frame, 16 pieces of 100x50x20mm steel plates are welded on the large and small heads of the four pieces of guide vanes in X and Y directions and the inner and outer water distribution rings, the outer water distribution ring, the guide vane and the inner water distribution ring are connected into a whole, and the hoisting anti-impact device is welded on the connecting frame; the safety of hoisting, the prevention of changes of the technical parameters such as the guide vane end surface gap after the preliminary adjustment and the deformation of the water guide mechanism during hoisting are met.

[0054] (12) Final adjustment of guide vane end surface and vertical gap

[0055] After the water guide mechanism is hoisted into place, the final adjustment shall be carried out after the final unit axis adjustment is completed.

[0056] 1) Final adjustment of guide vane end surface gap

[0057] Measure the guide vane end surface gap as a whole, check whether it meets the total gap required by the design, and adjust the outer water distribution ring to reach the total design value, during the adjustment, considering that the rotor and the runner will cause the inner water distribution ring to sink a little bit after being hung, the gap in +Y direction can be adjusted to be slightly smaller than the gap in -Y direction during the adjustment, and the connecting bolts of the outer water distribution ring are tightened after the adjustment. The 24x2x100 adjusting bolts on the guide vane sleeve are used to adjust the gap between the upper and lower end surfaces of the distribution guide vane according to the design requirements, and the nut on the adjusting bolt is finally locked.

[0058] 2) Final adjustment of guide vane vertical gap

[0059] Measure the guide vane vertical gap as a whole, and adjust it through the spring connecting rod, if the guide vane vertical gap is large, the length of the connecting rod can be adjusted to adjust the guide vane vertical gap to the same direction, the last gap value is measured, the value is evenly distributed to each vertical surface, then the control ring is closed to realize the full closing of the guide vane, and finally the reinforcing connecting frame is removed.

[0060] Quality standards for the assembly and acceptance of the water guide mechanism:

[0061] The combination surface of the equipment should be smooth without burr. The joint gap should not pass the 0.05mm plug gauge inspection; local gap is allowed, which should not pass the 0.10mm plug gauge inspection, the depth should not exceed 1 / 3 of the combination surface width, and the total length should not exceed 20% of the circumference. There should be no gap around the combination bolt and pin, and the installation error of the combination joint should generally not exceed 0.10mm.

[0062] The inner and outer water distribution rings and the control ring combination surface should be coated with sealant or installed with sealing strips according to the design requirements. When the sealing strips are installed, the exposure amount of both ends is generally 1-2mm. After the control ring and the outer water distribution ring are hung into the pit, the gap between the control ring and the outer water distribution ring is measured or adjusted, which should meet the design requirements.

[0063] The inner water distribution ring upper blade lower shaft should be concentric with the outer water distribution ring upper sleeve, and the position degree should not be greater than 0.16mm.

[0064] The distance between the inner and outer flanges on the upstream side of the water guide mechanism should meet the design requirements, and the deviation should not be greater than 0.5mm (design value is 870mm).

[0065] The guide vane end surface gap adjustment is measured at the full closing position, and the inner and outer end surface gap distribution should meet the design requirements. The guide vane head and tail end surface gaps should be basically equal, and the rotation should be flexible.

[0066] The guide vane vertical surface gap is allowed to be locally maximum not more than 0.25mm, and the length is not more than 25% (671mm) of the guide vane height.

[0067] The concentricity of the inner and outer water distribution rings should also consider the unit installation bearing deflection, and the +Y direction eccentricity is 0.3-0.5mm.

[0068] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Therefore, any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A method of installing and adjusting the guide vane mechanism of a bulb turbine, characterized by, The method comprises the following steps: S1, assembling of the outer water distribution ring: four parts of the outer water distribution ring are combined into a whole on the ground in the installation room, and the flange on the upstream side faces downward during the combination; S2, sleeve installation: the sleeve and the shaft hole of the outer water distribution ring are cleaned before installation, the sleeve is pre-assembled with the shaft head of the guide vane, then the sleeve is hoisted, and the sleeve is pressed into the guide vane hole; S3, insertion and installation of the guide vane and the guide vane arm: before the guide vane is installed, the inner water distribution ring is hoisted into the outer water distribution ring, the outer water distribution ring is hoisted and placed on eight support piers provided by the factory, a wedge plate is placed on the support piers, the outer water distribution ring is adjusted to be horizontal, a rectangular ring is installed on the guide vane sleeve, then the guide vane is hoisted by using the electric hoist of the bridge machine, and the height and angle of the guide vane are adjusted by using the hand hoist, so that the large head of the guide vane is inclined upward and forms an angle of 30º with the horizontal line, the shaft head of the guide vane is adjusted to be concentric with the sleeve, the shaft head is inserted into the sleeve after being aligned, a full-tooth long screw is screwed into the center screw hole of the shaft head of the guide vane, the guide vane is kept in the full-closing position, the nut on the long screw is tightened, the guide vane is pulled into the shaft hole of the sleeve, after one piece of the guide vane is inserted and installed, a hand hoist is hung above the guide vane in correspondence, the guide vane is pulled by the hand hoist, meanwhile, the small head of the guide vane is supported by using a wooden square, then the hook on the electric hoist of the bridge machine is loosened; the corresponding guide vane arm is hoisted, the shaft head of the guide vane and the guide vane arm are cleaned and greased, the pin hole of the shaft head of the guide vane is adjusted to be consistent with the pin hole of the guide vane arm by using the guide vane wrench, then the half key is punched in to fix the guide vane arm, the end cover is installed, and the guide vane end cover bolt is tightened; the guide vane is pulled by using the bolt and the nut on the sleeve, so that the gap between the guide vane and the outer water distribution ring is 0.5 mm, the bolt between the end cover and the guide vane is tightened, the guide vane is fixed, and the hand hoist is removed; the remaining 15 pieces of guide vanes are inserted and installed according to the same scheme; S4, installation of the inner water distribution ring: the rust-proof paint and the dirt grease on the guide vane hole of the inner water distribution ring are cleaned, the inner water distribution ring is hoisted and placed on six support piers provided by the factory, a wedge plate is placed on the support piers, the horizontal degree of the inner water distribution ring is adjusted, the center of the inner water distribution ring and the outer water distribution ring is adjusted by moving the inner water distribution ring, the wedge plate on the support piers of the outer water distribution ring and the inner water distribution ring is adjusted, so that the height difference between the flanges of the inner water distribution ring and the outer water distribution ring meets the requirements of the drawings; S5, installation of the lower shaft of the guide vane: the lower shaft of the guide vane and the lower shaft sleeve are cleaned, the lower shaft sleeve is adjusted to be aligned with the shaft hole of the inner water distribution ring by cooperating with the jack, the O-shaped ring is installed on the lower shaft, the lower shaft sleeve is lightly knocked by using a copper bar, the lower shaft of the guide vane is installed in place by cooperating with the three long bolts, the bolt is installed and tightened, and finally the lower shaft plug and the gasket are installed; S6, the installation and adjustment of the control ring: clean the ball bearing groove of the outer distribution ring and the control ring, then assemble the control ring. When assembling, weld several temporary supports on the outer distribution ring of the guide vane, set up a screw jack on it to adjust the control ring. Before the control ring is put into the guide ring, install a felt strip on both sides of the packing groove in the steel ball groove on the flange of the outer distribution ring, and apply lubricating grease. Hoist the control ring on the screw jack on the temporary support to assemble it into a whole circle. Apply lubricating grease in the steel ball groove, install the steel ball and the ball bracket, install the pressure ring, and insert the pressure plate pin. Tighten the whole pressure ring on the control ring, then loosen the tightening screw, use the bolt to lift the whole pressure ring, install two hand-operated hoists on the flange downstream of the outer distribution ring through the lifting ring to symmetrically pull the control ring to see if it can rotate. If the control ring cannot rotate, continue to lift the pressure ring until the control ring rotates smoothly. Install several screw plugs and remove the jack and temporary support. Check whether the guide vane is consistent with the mark made by the manufacturer when it is fully open and fully closed. Finally, close the control ring to the fully closed position. S7, spring link installation: pull the guide vane arm by hand-operated hoist to make the distance between the guide vane arm shaft hole and the control ring ear hole 800mm. Install the guide vane safety link. After the installation of the link, adjust the special stud to make the stud ball surface 5mm away from the guide vane arm. Measure and adjust the distance between the two pin shafts of the spring link to also be 800mm. Then install the spring link in place according to the number. Measure the distance between the two pin holes of the spring link and make a record. S8, guide vane operating mechanism assembly: close all guide vanes. Take two pairs of evenly distributed guide vane sealing edges and make them consistent with the full-closed line on the inner surface of the outer distribution ring. Adjust the remaining guide vanes according to the full-closed line of the first four guide vanes and make them consistent. Fix the control ring at the full-closed position to make the full-closed mark on the control ring consistent with the mark on the outer distribution ring. Measure the distance between the two pin holes of the safety link. Adjust the distance by screw clamp. Finally, install the connecting pin between the guide vane arm and the link, and the link and the control ring. S9, guide vane end face gap adjustment: measure the end face gap of the guide vane. Measure the total gap of each guide vane. After measurement, analyze whether the upper and lower bearings of the guide vane are concentric. If most of the guide vanes are not concentric and are all biased to one side, the inner distribution ring of the guide vane needs to be rotated and adjusted. Finally, make the single-sided gap of the guide vane end face equal through the four adjusting bolts on the sleeve. S10, guide vane vertical face gap adjustment: measure the vertical face gap of the guide vane. Adjust the vertical face gap of the guide vane through the guide vane spring link. Check the vertical face gap of the guide vane with a feeler gauge. After the guide vane mechanism is hoisted into place, measure and adjust it at one time. Finally, the adjusted vertical face gap of the guide vane should meet the design requirements of the manufacturer, and a record should be made. S11, reinforce the guide vane mechanism: add one set of steel structure reinforcement device and one set of anti-impact device on site. Use the connecting frame to connect and fix the inner and outer distribution rings into a whole. Weld 16 steel plates on the large and small heads of the four guide vanes and the inner and outer distribution rings in X and Y directions to connect the outer distribution ring, guide vane, and inner distribution ring into a whole. Weld the anti-impact device on the connecting frame. S12, final adjustment of guide vane end face and vertical face gap: After the water guide mechanism is hoisted into place, final adjustment is to be made after the final unit axis adjustment is completed. 1) Final adjustment of the guide vane end face gap Measure the guide vane end face gap as a whole, check whether it meets the total gap required by the design, and adjust the outer distribution water ring to reach the total design value. During the adjustment, considering that the rotor and runner will cause the inner distribution water ring to sink slightly after being mounted, the gap in the +Y direction can be adjusted to be slightly smaller than the gap in the -Y direction. After the adjustment, tighten the connecting bolts of the outer distribution water ring. Use the 24x2x100 adjustment bolts on the guide vane sleeve to adjust the gap between the upper and lower end faces of the distribution guide vane according to the design requirements. Finally, lock the nut on the adjustment bolt. 2) Final adjustment of the guide vane vertical face gap Measure the guide vane vertical face gap as a whole, and adjust it through the spring link. If the guide vane vertical face gap is large, adjust the length of the link to adjust the guide vane vertical face gap in the same direction. Measure the final gap value and divide it equally among each vertical face. Then close the control ring to achieve full closure of the guide vane. Finally, remove the reinforcement connecting frame.

2. The method of installing and adjusting the guide vane mechanism of a bulb tubular turbine according to claim 1, characterized in that, In step S1, before the outer distribution water ring is assembled, a sealing rubber strip is installed on the assembly surface, and sealing glue is applied. The rubber strip protrudes 10mm from the joint flange. When the outer distribution water ring is assembled, it is assembled according to the number marked by the manufacturer, the assembly screws are tightened, and the pins are tightened. After the outer distribution water ring is assembled, check the diameter of the center processing line of the downstream flange bolt hole, and measure whether the data matches the design value. Remove the sleeve from the outer distribution water ring for cleaning and inspection. When disassembling, make sure to mark the number. Then hoist the assembled outer distribution water ring and place it on the eight supporting piers provided by the manufacturer to adjust the level. Recheck the X and Y direction marks made by the manufacturer and make a record.

3. The method of installing and adjusting the guide vane mechanism of a bulb tubular turbine according to claim 1, characterized in that, In step S2, before the sleeve is pressed into the guide vane hole, check the fit and rotation flexibility of the sleeve and the guide vane shaft head. After checking that it meets the requirements, install the O-shaped sealing ring on the guide vane sleeve and apply lubricating grease to the guide vane hole.

4. The method of installing and adjusting the guide vanes of a bulb turbine according to claim 1, wherein In step S3, place a 0.4-0.6mm thick purple copper sheet between the guide vane and the outer distribution water ring.

5. The method of installing and adjusting the guide vanes of a bulb turbine according to claim 1, wherein In step S4, under the premise that the relevant measuring points of the tubular seat meet the requirements, adjust the wedge plate on the inner distribution water ring supporting pier to make the distance between the upstream flanges of the inner and outer distribution water rings 870mm. If the distance between the downstream flanges of the inner and outer cones of the tubular seat exceeds the requirement, adjust the distance between the two upstream flanges of the inner and outer distribution water rings according to the actual distance between the downstream flanges of the inner and outer cones of the tubular seat.

6. The method of installing and adjusting the guide vanes of a bulb turbine according to claim 1, wherein In step S6, after the control ring is assembled into a complete circle, adjust the jack to make the control ring steel ball groove edge not misaligned with the outer distribution water ring steel ball groove edge. Check the gap between the control ring and the outer distribution water ring, and check whether the control ring steel ball groove and the outer distribution water ring steel ball groove are on the same horizontal line. If not, adjust them with the jack on the supporting pier.

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