GB 8564-1988 Technical Specifications for Installation of Hydrogenerator Sets
Some standard content:
1 General Provisions
National Standard of the People's Republic of China
Technical Specification for Installation of Hydraulic-turbine and Generator Units
Specification for installation of hydraulic-turbine and generator units1.0.1 This specification is applicable to hydropower stations that meet one of the following conditions Installation and acceptance of the hydraulic generator set: a. The single unit capacity is 3000kW and above;
b. When the turbine is Francis type or impact type, the nominal diameter of the runner is 1.0m or above; c. The turbine is For axial flow type, oblique flow type, and cross flow type, the nominal diameter of the runner is 1.4m or more. The single unit capacity is 35×10kW and above; or Francis turbine, the nominal diameter of the runner is above 6.0m. Pumped energy reversible units and small hydro-turbine generator units can be implemented as a reference. UDC621.331
2
GB8564-88
1.0.2 The installation of the unit shall be based on the unit installation drawings and relevant technical documents approved by the design unit and manufacturer, and in accordance with the requirements of this specification conduct. However, if the manufacturer has special requirements due to improved design, the requirements of the manufacturer's relevant technical documents should be followed. For matters that are not covered by this specification and the manufacturer's technical documents, the construction unit shall work with the manufacturer and relevant units to formulate supplementary regulations and submit them to the competent department for review and approval before implementation. Important ones shall be reported to the ministry for filing.
1.0.3 Hydrogen generator equipment should comply with the current national technical standards (including this specification) and the provisions of the order contract, and should have factory inspection records and certificates of conformity. After the equipment arrives at the receiving location, relevant personnel should be organized to unpack, count, and inspect the equipment within the time limit agreed with the manufacturer, and follow the "packaging, transportation, and storage conditions for hydroelectric generator sets". 1.0.4 The installation materials used in the installation of hydro-generator units should comply with the design requirements. The main materials of important parts must have inspection or factory certificates of conformity.
1.0.5 The installation site should be planned uniformly. Measures should be taken to ensure that the installation site is windproof, rainproof, fireproof, and kept clean and provided with adequate lighting. For components and equipment affected by temperature, the temperature of the installation site should not be lower than 5°C; for equipment with humidity requirements, the relative air humidity of the installation site is generally not higher than 75%. 1.0.6 After the installation of the hydro-generator unit is completed, it shall be started and tested in accordance with the requirements of this specification, and the quality of the unit shall be inspected and accepted. 2 General Provisions
2.0.1 The equipment should be thoroughly cleaned and inspected before installation, and the main dimensions and fitting tolerances of important components should be checked. Equipment that arrives fully assembled with a manufacturer's warranty does not need to be disassembled. 2.0.2 When the equipment foundation pad is buried, the elevation deviation generally does not exceed ~, mm, the center and distribution position deviation generally does not exceed 10mm, and the horizontal deviation generally does not exceed 1mm/m.
2.0.3 Buried components should be reinforced and secure after installation. Foundation bolts, jacks, tensioners, wedge plates, foundation plates, etc. should all be fixed by spot welding. The joint surface between buried parts and concrete should be free of oil stains and severe corrosion. 2.0.4 The formwork boards used for adjustment should be used in pairs, with the overlap length being more than 2/3. 2.0.5 Equipment installation should be carried out after the strength of the foundation concrete reaches 70% of the design value. The second phase concrete of the foundation slab should be poured densely, and micro-expanded cement is generally suitable.
Ministry of Water Resources and Electric Power
Approved on 1988-04-12
National Machinery Industry Commission
Implemented on 1988-07-01
GB8564—88||tt ||2.0.6 The equipment assembly surface should be smooth and free of burrs. The joint gap should be checked with a 0.05mm feeler gauge and it will not pass; partial gaps are allowed and should be checked with a 0.10mm feeler gauge. The depth should not exceed 1/3 of the width of the combined surface and the total length should not exceed 20% of the circumference; combined bolts and There should be no gaps around the pins. The misalignment of the mounting surface at the combination joint generally does not exceed 0.10mm. 2.0.7 When assembling components, attention should be paid to the matching marks. When installing multiple units, each unit should be assembled with parts marked with the same series number.
The sequential numbering of similar components or measuring points in the installation record. For fixed components, they should start from ten Except for the turning measuring points, which are in counterclockwise order, the rest are numbered clockwise. Manufacturer numbers that are inconsistent with this regulation should be noted. 2.0.8 Lubricant should be applied when installing fine-thread connecting bolts; the connecting bolts should be tightened evenly in stages; the tightness of bolts with pre-tightening force requirements should be measured, and the deviation from the design value should not exceed 10%. Bolts fastened by heat sealing technology should be randomly checked at room temperature after tightening for about 20%. Bolts, nuts, and pins should be locked or spot welded firmly according to design requirements. After each component is installed and positioned, the ream pin holes should be drilled according to the design requirements. 2.0.9 The measurement error of the X and Y datum line marking points and elevation points used for unit installation should not exceed 1 mm. The diameter of the piano wire used for center measurement is generally 0.30.4mm, and its tensile stress should not be less than 1200MPa (approximately 120kgf/mm). 2.0.10 When the pressure-bearing equipment and connectors manufactured on site are tested for strength and pressure, the test pressure is 1.5 times the rated working pressure, but the minimum: the pressure shall not be less than 0.4MPa (4kgf/cm2), maintained for 10 minutes, without leakage, cracks and other abnormal phenomena. When the equipment and its connections are subjected to a tight pressure test, the test pressure is 1.25 times the practical rated working pressure and maintained for 30 minutes without leakage. leakage phenomenon.
A single cooler should undergo a pressure test according to the test pressure required by the design. If there is no design requirement, the test pressure is generally twice the working pressure, but not less than 0.4MPa (4kgf/cm2), and maintained for 60 minutes. No leakage. 2.0.11 When the equipment container is subjected to the kerosene leakage test, it should be maintained for at least 4 hours, and there should be no leakage. When the valve is subjected to the kerosene leakage test, it should be maintained for at least 5 minutes, and there should be no leakage.
2.0.12 A single key should be checked for matching with the keyway, and its tolerance should meet the design requirements. After the paired keys are matched, the parallelism should meet the design requirements. 2.0.13 After the bearing is installed, when welding on the rotating parts, the ground wire of the welding machine should be directly connected to the parts to be welded, and safety protection measures should be taken to ensure that welding spatter does not fall into the bearing. 2.0.14 All components of the hydro-turbine generator set should be painted and protected as required. Please refer to Appendix B for its color. If it does not match the factory decoration, appropriate changes can be made in addition to pipe coloring.
The paint should be applied evenly without bubbling or streaking. Some parts with special requirements should be painted according to the following requirements: The coils and leads of the generator stator, rotor, exciter, etc. should be sprayed with insulating paint according to the design requirements. a.
b. The oil tanks and the inner walls of oil tanks in all parts of the unit should be coated with resistant paint. The outer surfaces of generators and speed regulators exposed above the ground of the main factory building should be smooth and spray-painted. c.
3 Vertical impact turbine installation
3.1 Installation of embedded components
3.1.1 Suction pipe lining installation, the allowable deviation should comply with the requirements of Table 1. 3.1.2 The allowable deviation of the installation of the runner chamber, foundation ring and seat ring should comply with the requirements of Table 2. 3.1.3 The combined surfaces of the split runner chamber, foundation ring, and seat ring should be coated with lead oil or sealant, and the clearance between the combined joints should meet the requirements of Article 2.0.6. To prevent water leakage, the combined seams across the water surface can be sealed and welded. 3.1.4 When the upper ring of the pillar-type seat ring and the fixed guide vane are installed, the direction of the azimuth deviation of the seat ring and the foundation ring should be consistent. In order to ensure that the end gap of the guide vane meets the design requirements, the height dimension from the top surface of the foundation ring to the installation surface of the seat ring should also be strictly controlled. Considering that the seat ring will sink due to concrete pouring, a deformation value should be added.
sequence
number
2
5
serial number
2
3
5|| tt||Item
Tools
Nozzle diameter
Difference in circumference of inner wall of adjacent nozzles
Center and orientation of upper nozzle
Upper nozzle Elevation
Lower nozzle center
item
project
center and orientation
height
range
level|| tt||Runner chamber roundness
Basic ring, seat ring roundness
(including coaxiality)
≤3000
0.001L
4
+8
0
10
GB8564—88
Suction pipe lining installation allowable deviation
Table 1||tt ||Allowable deviation
Runner diameter
>3000
≤6000
>6000
≤8000
±0.0015D
10
6
+12
-0
15
8
+15||tt| |0
20
>8000
D
Said
Ming
mm
The design value of the nozzle diameter. Measure at least eight points equally. Flanged and plug-in suction pipes should meet the requirements of pipe orifice diameter in Table 14
pipe orifice circumference
10
+18
-0||tt| |25
The distance between the X, Y marks on the measuring nozzle and the X, Y of the unit
the reference line
suspended wire hammer measurement
Table 2
2 turns Wheel chamber, foundation ring, seat ring installation allowable deviation Allowable deviation
Diameter
Runner
3000
2
Radial measurement||tt| |0.07mm/m
>3.000
≤6000
3
>6.000
≤8000
±3||tt| |>8000
5
0.05mm/m measured in 8 or 16 equal parts in the circumferential direction
But the maximum in the radial direction shall not exceed 0.60mm
The sum of each radius and the average radius Poor, should not
exceed the design average clearance by 10%
1.0
1.5
2.0
2.5
say||tt ||Ming
mm
The distance between the X and Y marks on the weight-measuring embedded parts and the X and Y reference lines of the unit
Axial flow measurement of the upper, middle and lower sections; For diagonal flow type, measure the upper and lower openings, and measure at least eight points from the center line of the unit to the radius of the boring mouth; for axial flow units, use the runner chamber to determine the center line of the unit; measure at least eight points
3.1.5 When welding the joint between the suction pipe lining and the base ring (or runner chamber), measures should be taken to prevent the seat ring (or runner chamber) from deforming. 3.1.6 The allowable deviation of volute assembly should comply with the requirements in Table 3. Sequence
3.1.7
Sequence
1
2
3
4
No.
Item
G
Ki-K2
er-e
L
D
Item
GB8564-88| |tt||Table 3 Allowable deviation of volute assembly
Allowable deviation
+6
+2
±10
±0.002e||tt ||±0.001
±0.002D
The allowable deviation of volute installation should comply with the requirements of Table 4. Table 4 Volute installation allowable deviation
No.
1
2
3
4
5
item| | tt | Inclination value of positioning section pipe mouth
Positioning section pipe mouth and reference line
Farthest point radius
3.1.8 Volute welding should meet the following requirements: a.
b.
Clear.
c.
Allowable deviation
±0.003D
D
±5
±15
5|| tt||±5
±0.004R
Welders participating in welding should pass the examination. R
said
said
Ming
Ming
volute inlet diameter. If the steel pipe is installed first, the transition should be smooth
Design value of the furthest point radius
mm
mm
The spot welding electrode should be the same as the welding electrode, and the spot welding electrode should be the same as the welding electrode before welding Check spot weld quality. If there are defects such as cracks, incomplete welding, and pores, the butt weld gap between each section and the butterfly edge should be thoroughly cleaned. The gap is generally 2 to 4 mm. The misalignment of the flow surface should not exceed 10% of the plate thickness. However, the maximum misalignment of the longitudinal seam should not exceed 10% of the plate thickness. Teeth should not be larger than 2mm.
The local gap at the groove exceeds 5mm, and its length should not exceed 10% of the weld length; and generally, surfacing treatment should be performed at the groove. d.
e.
f.
For circumferential seam welding of joints, measures should be taken to reduce welding stress and prevent seat ring deformation. Special steels need to be welded according to specially formulated procedures and requirements. 3.1.9 The volute welds should be inspected by non-destructive testing. When using radiographic flaw detection, check length: 10% for circumferential seams, 20% for longitudinal seams and butterfly edges; weld quality, according to the standards stipulated in radiography and quality classification of GB3323 steel fusion welded butt joints, circumferential seams should reach grade 1. Longitudinal seams and butterfly edges shall meet the requirements of Level 1. When using ultrasonic flaw detection, check the length: circumferential seams, longitudinal seams and butterfly edges are all 100%; for doubtful areas, radiographic flaw detection should be used as appropriate to review; weld quality, according to JB1152--81 "Steel Pressure Vessel Docking" According to the standards stipulated in "Ultrasonic Flaw Detection of Welds", the circumferential seams should meet the requirements of Level I, and the longitudinal seams and butterfly edges should meet the requirements of Level 1. The hydraulic pressure test of the volute construction site shall be carried out according to the design requirements. Concrete volute protective walls are generally inspected by kerosene penetration test, and the welds should have no penetrating defects. 3.1.10 Where the volute is equipped with an elastic layer, angle steel, pressure plates, etc. should be cleaned. 3.1.11 When installing, welding and pouring concrete the volute, measures should be taken to prevent the seat ring from deforming. The rising speed of concrete pouring should not exceed 300mm/h, and the pouring height of each layer should not exceed 2.5m. The deformation of the seat ring should be monitored during construction, and the concrete pouring sequence should be adjusted at any time according to the actual situation. 3.1.12 The flow-passing surface of the embedded parts should be smooth, the welds between the upper part of the suction pipe lining and the runner chamber should be smoothed, and the flow-passing surfaces of the concrete and the embedded parts should have a smooth transition
GB8564-88
3.1.13 Allowable deviations for pit lining installation - generally comply with the requirements in Table 5. Table 5 Machine pit lining installation allowable deviation
Permissible deviation
Serial number
1
2
3.1.14
Serial number|| tt||1
2
3
4
3.2
item
center
upper diameter|| tt||3000
5
±5
Runner diameter
>3000
≤6000
10
±8
>6000
≤8000
15
±10
>8000
20
±12| |tt||The allowable deviation of the basic installation of the relay should comply with the requirements in Table 6. Say
Ming
mm
Measure the distance between the lining flange and the upper flange boring of the seat ring at eight equal points
Table 6 Relay basic installation permission Deviation
Allowable deviation
Item
Tools
≤3000
Verticality
Center and elevation
Runner diameter
>3000
≤6000
Parallelness to the unit coordinate datum line
Distance to the unit coordinate datum line
Runner assembly||tt ||>6000
≤8000
±1.0
1.0
>8000
0.30mm/m
±1.5||tt ||1.5
±3
±2.0
2.0
say
±2.5
2.5
Ming|| tt | | mm | Heat treatment 3.2.1
The runner after welding and heat treatment shall meet the following requirements: a.
The runner shall have no cracks. The weld of the lower ring of the runner is not allowed to have undercut. It should be inspected with ultrasonic waves and should comply with the requirements of Level I weld flaw detection in JB1152.
b.
c.
d.
e.
The upper crown combined seam gap meets the requirements of 2:0.6. The concave value of the upper crown flange should not be greater than 0.07mm/m, and the convex value should not be greater than 0.04mm/m. The misalignment of teeth at the lower ring weld should not be greater than 0.5mm. After the blade filling block is installed and welded, the blade shape should meet the design requirements f.
The surfacing welding of the anti-wear and anti-cavitation layer should be carried out according to the design requirements. After polishing, the thickness should not be less than 4mm, and the roughness should be consistent with the polished part.
3.2.2 Before the anti-leak ring is installed and welded on the construction site, the roundness of the anti-leak ring where the runner is installed should meet the requirements of 3.2.8; after installation and welding, the anti-leak ring should fit tightly and the welds should be smooth. Crack
3.2. When rounding the leak-proof ring of the 3-minute half runner, the measuring points should not be less than 32 points, and the roundness should meet the requirements of 3.2.8. 3.2.4 The half-minute runner shall be subjected to a static balance test according to the requirements of 3.2.5 after rounding. A water diversion plate should be used during the test, and the counterweight should be welded to the top surface of the upper crown under the water diversion plate, and the welding should be firm. 3.2.5 The static balance test of the runner should meet the following requirements: a.
b.
The static balancing tool should be concentric with the runner, and the horizontal deviation of the support base should not be greater than 0.02mm/m. Adjust the sensitivity of the static balancing tool to meet the requirements in Table 7. c,
Runner weight
kg
5000
>5000~10000
>10000~50000
>50000~100000| |tt||>100000~200000
Table 7
GB8564-88
Distance from the center of the sphere to the center of gravity of the runner
Maximum distance
40|| tt||50
60
80
100
The residual unbalanced moment should meet the design requirements. mm
Minimum distance height
20
30
40
50
70
3.2.6||tt ||The pressure resistance and action test of the propeller turbine runner should be carried out when the runner is in the upright position as much as possible, and should meet the following requirements: the oil quality of the test oil should be qualified, and the oil temperature should not be lower than +5°C. b.
C
d.
e
The maximum test pressure is generally 0.5MPa (5kgf/cm). Under the maximum test pressure, keep it for 16h.
During the test, operate the blade full stroke switch 2 to 3 times per hour. There should be no leakage in each combination joint. The leakage of each blade sealing device with and without test pressure is added. The oil volume should not exceed the requirements in Table 8, and should not be greater than the oil leakage volume during factory testing. Table 8 Allowable oil leakage for each blade sealing device. Runner diameter
mm
Allowable oil leakage for each blade seal per hour mL
≤3000||tt| |5
>3000
≤6000
7
>6000
≤8000
10
Runner relay The action of the device should be smooth, and the minimum oil pressure for opening and closing generally does not exceed 15% of the working pressure. f.
g.
Draw the relationship curve between the runner relay stroke and the blade angle. 3.2.7
The connection between the main shaft and the runner should meet the following requirements: there should be no gap in the flange combination joint, check with a 0.05mm feeler gauge, and cannot be stuffed. b.
The roundness of the leak-proof ring of the overall runner shall meet the requirements specified in Article 3.2.8. >8000
12
The bolt pockets of the flange guard should be filled. When it also serves as a part of the maintenance seal, the roundness should be checked and meet the requirements specified in Article 3.2.8 c.
.
d.
The drain cone bolts should be spot welded firmly, anti-deformation measures should be taken when welding the guard plate, and the welds should be ground smooth. 3.2.8 The coaxiality and roundness of each part of the runner shall be checked with the main axis as the center. The difference between each radius and the average radius shall meet the requirements of Table 9.
Working headwwW.bzxz.Net
m
<200
≥200
1. Anti-leak ring
Part
2. Installation surface of anti-drowning ring
3. Outer edge of blade
4. Anti-leak ring of water diversion plate
GB8564—88
Table 9 Coaxiality of various parts of the runner Permissible deviation of degree and roundness
5. Flange protective cover also used as maintenance seal
1. Outer edge of upper crown
2. Outer edge of lower ring
3 .Upper comb anti-leakage ring
4. Lower anti-leakage ring
3.3 Water guide mechanism pre-assembly
Allowable deviation
±10% design gap value||tt ||±20% design gap value
±5% design gap value
±0.10mm
say
ming
only the outer edge of the blade is considered When necessary,
measure when the external audit quantity is equal to zero
The corresponding fixed parts are the top cover and the bottom ring
3.3.1 Before pre-installation of the water guide mechanism, re-test the upper plane of the seat ring The elevation, level and boring roundness shall comply with the requirements in Table 2 of Article 3.1.2. 3.3.2 The combined surfaces of the split-flap bottom ring, top cover, support ring, etc. should be coated with lead oil or sealant, and the combined joint gaps should meet the requirements of 2.0.6. 3.3.3 Determination of the reference centerline of the unit is generally as follows: for mixed flow type, press the leak-proof ring, for axial flow type, press the runner chamber; for diagonal flow type, press the upper stop of the runner chamber. The water guide mechanism is pre-assembled and should meet the following requirements: Check the coaxiality and roundness of each fixed anti-leak ring (ring) according to the reference center line. The difference between each radius and the average radius should comply with a.||tt in Table 9 ||Permissible deviation requirements for corresponding parts. If the height of the working surface of the anti-leak ring exceeds 200mm, the upper and lower rings should be inspected. For axial flow units, the coaxiality of the flange joint of the lower cone bearing seat should be checked according to the reference center line, and the allowable deviation should meet the requirements of Table 10.
Table 10 Allowable deviation of coaxiality between lower cone bearing seat flange joint and runner chamber Allowable deviation
item
item
coaxiality||tt ||≤3000
0.25
Runner diameter
>3000
≤6000
0.50
>6000
≤8000
0.75
The pre-installed quantity of guide vanes is generally not less than 50% of the total number. b.
>8 000
1.00
Say
Ming
Measure at least four points
mm
c. After adjusting the top cover and bottom ring, generally tighten no less than half of the bolts symmetrically. Check the end clearance of the guide vanes. The large and small ends of each guide vane should be consistent, and regular inclination is not allowed. The total end clearance should not exceed the design clearance value. For units with thrust bearings installed on the top cover, the deformation value after loading should be considered.
d. Check the bearing support equipped with the ring relay. Its center deviation should not be greater than 0.10mm, and its horizontal deviation should not be greater than 0.05mm/m.
3.3.4 The direct formal installation of the water guide mechanism without pre-assembly shall also comply with the relevant provisions of Articles 3.3.1 to 3.3.3. 3.4 Installation of rotating parts in place
3.4.1 The lifting elevation of the main shaft and runner should generally be slightly lower than the design elevation. The top surface of the main shaft and the bottom surface of the hoisted generator shaft flange stop should be 2~6mm gap. For units where the thrust head is installed on the turbine shaft, the elevation should be slightly higher than the design elevation, so that there is a gap of 2 to 5 mm between the thrust head and the back of the mirror plate after being installed. The verticality deviation of the spindle is generally not greater than 0.05mm/m. When the turbine or generator is installed according to the actual alignment, the center of the runner and the verticality of the main shaft should be adjusted so that the leak-proof ring gap meets the requirements of Article 3.4.2GB8564-88
, and the verticality deviation of the main shaft should not be greater than 0.02mm/m3.4.2 The final elevation of the runner installation, the allowable deviation of the gap between each anti-leakage ring or the gap between the blade and the runner chamber should comply with the requirements of Table 11. Table 11 Runner installation height and clearance allowable deviation Allowable deviation
serial number
2
height
interval
item
range|| tt||mesh
mixed flow type
axial flow type
oblique flow type
working head
≥200m
Q||tt ||Work
Head
200m
32
b
b2
≤3000
±1.5||tt ||+2
0
+0.8
0
Runner diameter
>3.000
≤6000
±2
+3
0
+1.0
0
>6000|| tt||≤8000
±2.5
+4
0
>8000
±3
+5||tt| |0
The difference between each gap and the actual average gap should not exceed ±20% of the actual average gap value
The difference between each gap and the design gap should not exceed ±10% of the design gap value|| tt||The difference between each gap and the design gap should not exceed ±0.20mm
Ming
mm
Measure the height and misalignment of the fixed and rotating anti-leak rings
Measure The distance between the bottom ring and the top surface of the runner body
Measure the gap between the blade and the runner chamber
The gap between the blade and the runner chamber, and measure the water inlet, outlet and middle three places on the fully closed position plate|| tt||3.4.3 After the unit is coupled, there should be no gap in the joint between the two flanges; use a 0.05mm feeler gauge to check that it cannot be inserted. 3.4.4 The installation of the operating oil pipe and oil receiver should meet the following requirements: a.
b
The operating oil pipe should be strictly cleaned, the connection should be reliable, and there should be no oil leakage; the threaded operating oil pipe should have a lock tight measures. The swing of the operating oil pipe is generally not greater than 0.20mm for fixed copper tile structures; for floating copper tile structures, it is generally not greater than 0.30mm.
c.
The horizontal deviation of the oil receiver, measured on the plane of the oil receiver seat, should not be greater than 0.05mm/m. The gap between the oil deflector ring between the rotating oil basin and the oil receiver seat should be even and not less than 70% of the design value. d.
The insulation resistance of the oil receiver to the ground, measured when there is no water in the draft tube, is generally not less than 0.5Mα. e.
3.5 Installation and adjustment of guide vanes and relays
3.5.1 Between the ends of the guide vanes, generally the upper part is 60% to 70% of the actual total clearance value, and the lower part is 60% to 70% of the actual total clearance value. 30% to 40%. For units with a working head of 200m and above, the lower part is 0.05mm, and the remaining clearance is left at the upper part. For units with thrust bearings installed on the top cover, the lower gap should be larger than the upper part. The specific requirements are specified by the design. The axial clearance of the guide vane thrust ring should not be greater than 50% of the upper clearance value of the guide vane, and the guide vane should rotate flexibly.
3.5.2 The clearance on the facade of the guide vane cannot be passed when checked with a 0.05mm feeler gauge when it is tied tightly with a wire rope or pressed by the relay oil pressure. The local clearance should not exceed the requirements of Table 12. The total length with gaps should not exceed 25% of the guide vane height. 3.5.3 At the maximum opening position, the distance between the guide vane and the stopper should meet the design requirements. If there is no provision, 510mm should be left. Serial number
1
2
Project
Guide vane without sealing strip
Guide vane with sealing strip
GB8564—88
Table 12 Allowable local facade clearance of guide vanes
Allow local facade clearance
Guide vane height
≤600
0.05
>600
≤1200
0.10
0.15
>1200
≤2000
0.13
>2 000| |tt||0.15
0.20
say
Ming
mm
The guide vane with sealing strip is installed in the sealing strip
After inspection, there should be no gap
The connecting rod should be connected with the guide vane tied tightly with a wire rope and the control ring in the fully closed position. The connecting rod should be adjusted horizontally, and the height difference between the two ends should not be greater than 1mm. Measure and record the distance between the two shaft holes. 3.5.4 The installation of the relay should meet the following requirements: a
After the relay that needs to be disassembled at the construction site has been disassembled, cleaned, inspected and assembled, the fit gaps should meet the design requirements, and the piston movement should be smooth and flexible.
The clearance between each combination surface shall comply with the requirements of Article 2.0.6. b.
c.
The position and opening of the throttling device should meet the design requirements. The relay shall undergo a tight withstand voltage test in accordance with the requirements of Article 2.0.10. During the test of the swing relay, the oil separator sleeve should be rotated back and forth 3 to 5 times. The inner sealing ring of the ring relay allows a small amount of oil dripping. e.
Serial number
The horizontal deviation of the relay installation, when the piston is in the middle position, the level of the measuring sleeve or piston rod should not be greater than 0.10mm/m. The pressing stroke of the relay is determined according to the requirements in Table 13. Table 13 Relay clamping stroke value
Pressing stroke value
item
straight cylinder relay
2
item
with Sealing strip guide vane
Guide vane without sealing strip
Swing type relay ring relay
≤3000
3~5
2~4
Runner diameter
>3000
≤6000
4~7
36
>6000
≤8000
6~8
5~7
>8000
7~9
6~8
The guide vane is in the fully closed position , when the relay rises from no pressure to 50% of the working oil pressure, its piston movement value is the pressing stroke
said
ming
mm
removed Relay oil pressure, measure the stroke value returned by the piston
If the limit device is easy to adjust, the swing
type relay can also meet the requirements of the straight cylinder relay
To determine
g, the relay piston stroke should meet the design requirements. The stroke deviation of the two pistons of the straight cylinder relay should not be greater than 1mm; the piston stroke allowance of the swing type relay should not be less than 10mm on either side of the guide vane in the fully open and fully closed positions. h. After piping the oil separator of the swing relay, do not adjust it. 3.6 Installation of water guide and main shaft seal
3.6.1 The bearing bush should meet the following requirements:
The surface of the rubber bearing bush should be smooth and free of defects such as cracks and shelling; the babbitt bearing bush should be free of dense pores and cracks , hard spots and shelling and other a.
defects, the roughness of the tile surface should be better than the requirements. b. Rubber tiles and cylindrical tiles should be trial-installed with the shaft, and the total clearance should meet the design requirements. The difference between the maximum and minimum total clearance at each end and the difference between the total clearance between the upper and lower ends in the same orientation should not be greater than 10% of the measured average total clearance. When the simple bush meets the requirements of points a and b, it will no longer be scraped. Unless the design requires no scraping, the block bearing bush should generally be scraped. c.
05mm, and the remaining clearance is left in the upper part; for units with thrust bearings installed on the top cover, the lower clearance should be larger than the upper one, and the specific requirements are specified by the design. The axial clearance of the guide vane thrust ring should not be greater than 50% of the upper clearance value of the guide vane, and the guide vane should rotate flexibly.
3.5.2 The clearance on the facade of the guide vane cannot be passed when checked with a 0.05mm feeler gauge when it is tied tightly with a wire rope or pressed by the relay oil pressure. The local clearance should not exceed the requirements of Table 12. The total length with gaps should not exceed 25% of the guide vane height. 3.5.3 At the maximum opening position, the distance between the guide vane and the stopper should meet the design requirements. If there is no provision, 510mm should be left. Serial number
1
2
Project
Guide vane without sealing strip
Guide vane with sealing strip
GB8564—88
Table 12 Allowable local facade clearance of guide vanes
Allow local facade clearance
Guide vane height
≤600
0.05
>600
≤1200
0.10
0.15
>1200
≤2000
0.13
>2 000| |tt||0.15
0.20
say
Ming
mm
The guide vane with sealing strip is installed in the sealing strip
After inspection, there should be no gap
The connecting rod should be connected with the guide vane tied tightly with a wire rope and the control ring in the fully closed position. The connecting rod should be adjusted horizontally, and the height difference between the two ends should not be greater than 1mm. Measure and record the distance between the two shaft holes. 3.5.4 The installation of the relay should meet the following requirements: a
After the relay that needs to be disassembled at the construction site has been disassembled, cleaned, inspected and assembled, the fit gaps should meet the design requirements, and the piston movement should be smooth and flexible.
The clearance between each combination surface shall comply with the requirements of Article 2.0.6. b.
c.
The position and opening of the throttling device should meet the design requirements. The relay shall undergo a tight withstand voltage test in accordance with the requirements of Article 2.0.10. During the test of the swing relay, the oil separator sleeve should be rotated back and forth 3 to 5 times. The inner sealing ring of the ring relay allows a small amount of oil to drip. e.
Serial number
The horizontal deviation of the relay installation, when the piston is in the middle position, the level of the measuring sleeve or piston rod should not be greater than 0.10mm/m. The pressing stroke of the relay is determined according to the requirements in Table 13. Table 13 Relay clamping stroke value
Pressing stroke value
item
straight cylinder relay
2
item
with Sealing strip guide vane
Guide vane without sealing strip
Swing type relay ring relay
≤3000
3~5
2~4
Runner diameter
>3000
≤6000
4~7
36
>6000
≤8000
6~8
5~7
>8000
7~9
6~8
The guide vane is in the fully closed position , when the relay rises from no pressure to 50% of the working oil pressure, its piston movement value is the pressing stroke
said
ming
mm
removed Relay oil pressure, measure the stroke value returned by the piston
If the limit device is easy to adjust, the swing
type relay can also meet the requirements of the straight cylinder relay
To determine
g, the relay piston stroke should meet the design requirements. The stroke deviation of the two pistons of the straight cylinder relay should not be greater than 1mm; the piston stroke allowance of the swing type relay should not be less than 10mm on either side of the guide vane in the fully open and fully closed positions. h. After piping the oil separator of the swing relay, do not adjust it. 3.6 Installation of water guide and main shaft seal
3.6.1 The bearing bush should meet the following requirements:
The surface of the rubber bearing bush should be smooth and free of defects such as cracks and shelling; the babbitt bearing bush should be free of dense pores and cracks , hard spots and shelling and other a.
defects, the roughness of the tile surface should be better than the requirements. b. Rubber tiles and cylindrical tiles should be trial-installed with the shaft, and the total gap should meet the design requirements. The difference between the maximum and minimum total clearance at each end and the difference between the total clearance between the upper and lower ends in the same orientation should not be greater than 10% of the measured average total clearance. When the simple bush meets the requirements of points a and b, it will no longer be scraped. Unless the design requires no scraping, the block bearing bush should generally be scraped. c.
05mm, and the remaining clearance is left in the upper part; for units with thrust bearings installed on the top cover, the lower clearance should be larger than the upper one, and the specific requirements are specified by the design. The axial clearance of the guide vane thrust ring should not be greater than 50% of the upper clearance value of the guide vane, and the guide vane should rotate flexibly.
3.5.2 The clearance on the facade of the guide vane cannot be passed when checked with a 0.05mm feeler gauge when it is tied tightly with a wire rope or pressed by the relay oil pressure. The local clearance should not exceed the requirements of Table 12. The total length with gaps should not exceed 25% of the guide vane height. 3.5.3 At the maximum opening position, the distance between the guide vane and the stopper should meet the design requirements. If there is no provision, 510mm should be left. Serial number
1
2
Project
Guide vane without sealing strip
Guide vane with sealing strip
GB8564—88
Table 12 Allowable local facade clearance of guide vanes
Allow local facade clearance
Guide vane height
≤600
0.05
>600
≤1200
0.10
0.15
>1200
≤2000
0.13
>2 000| |tt||0.15
0.20
say
Ming
mm
The guide vane with sealing strip is installed in the sealing strip
After inspection, there should be no gap
The connecting rod should be connected with the guide vane tied tightly with a wire rope and the control ring in the fully closed position. The connecting rod should be adjusted horizontally, and the height difference between the two ends should not be greater than 1mm. Measure and record the distance between the two shaft holes. 3.5.4 The installation of the relay should meet the following requirements: a
After the relay that needs to be disassembled at the construction site has been disassembled, cleaned, inspected and assembled, the fit gaps should meet the design requirements, and the piston movement should be smooth and flexible.
The clearance between each combination surface shall comply with the requirements of Article 2.0.6. b.
c.
The position and opening of the throttling device should meet the design requirements. The relay shall undergo a tight withstand voltage test in accordance with the requirements of Article 2.0.10. During the test of the swing relay, the oil separator sleeve should be rotated back and forth 3 to 5 times. The inner sealing ring of the ring relay allows a small amount of oil dripping. e.
Serial number
The horizontal deviation of the relay installation, when the piston is in the middle position, the level of the measuring sleeve or piston rod should not be greater than 0.10mm/m. The pressing stroke of the relay is determined according to the requirements in Table 13. Table 13 Relay clamping stroke value
Pressing stroke value
item
straight cylinder relay
2
item
with Sealing strip guide vane
Guide vane without sealing strip
Swing type relay ring relay
≤3000
3~5
2~4
Runner diameter
>3000
≤6000
4~7
36
>6000
≤8000
6~8
5~7
>8000
7~9
6~8
The guide vane is in the fully closed position , when the relay rises from no pressure to 50% of the working oil pressure, its piston movement value is the pressing stroke
said
ming
mm
removed Relay oil pressure, measure the stroke value returned by the piston
If the limit device is easy to adjust, the swing
type relay can also meet the requirements of the straight cylinder relay
To determine
g, the relay piston stroke should meet the design requirements. The stroke deviation of the two pistons of the straight cylinder relay should not be greater than 1mm; the piston stroke margin of the swing relay should not be less than 10mm in the fully open and fully closed positions of the guide vane. h. After piping the oil separator of the swing relay, do not adjust it. 3.6 Installation of water guide and main shaft seal
3.6.1 The bearing bush should meet the following requirements:
The surface of the rubber bearing bush should be smooth and free of defects such as cracks and shelling; the babbitt bearing bush should be free of dense pores and cracks , hard spots and shelling and other a.
defects, the roughness of the tile surface should be better than the requirements. b. Rubber tiles and cylindrical tiles should be trial-installed with the shaft, and the total clearance should meet the design requirements. The difference between the maximum and minimum total clearance at each end and the difference between the total clearance between the upper and lower ends in the same orientation should not be greater than 10% of the measured average total clearance. When the simple bush meets the requirements of points a and b, it will no longer be scraped. Unless the design requires no scraping, the block bearing bush should generally be scraped. c.
1. The bearing bush should meet the following requirements:
The surface of the rubber bearing bush should be smooth and free of defects such as cracks and shelling; the Babbitt bearing bush should have no dense pores, cracks, hard spots, shelling, etc. a.
Defects, tile surface roughness should be better than the requirements. b. Rubber tiles and cylindrical tiles should be trial-installed with the shaft, and the total gap should meet the design requirements. The difference between the maximum and minimum total clearance at each end and the difference between the total clearance between the upper and lower ends in the same orientation should not be greater than 10% of the measured average total clearance. When the simple bush meets the requirements of points a and b, it will no longer be scraped. Unless the design requires no scraping, the block bearing bush should generally be scraped. c.
1. The bearing bush should meet the following requirements:
The surface of the rubber bearing bush should be smooth and free of defects such as cracks and shelling; the Babbitt bearing bush should have no dense pores, cracks, hard spots, shelling, etc. a.
Defects, tile surface roughness should be better than the requirements. b. Rubber tiles and cylindrical tiles should be trial-installed with the shaft, and the total gap should meet the design requirements. The difference between the maximum and minimum total clearance at each end and the difference between the total clearance between the upper and lower ends in the same orientation should not be greater than 10% of the measured average total clearance. When the simple bush meets the requirements of points a and b, it will no longer be scraped. Unless the design requires no scraping, the block bearing bush should generally be scraped. c.
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