GB/T 15468-2020 PDF English
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| GB/T 15468-2020 | English | 605 |
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Fundamental technical requirements for hydraulic turbines
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| GB/T 15468-2006 | English | RFQ |
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Fundamental technical requirements for hydraulic turbines
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| GB/T 15468-1995 | English | 759 |
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Fundamental technical requirements for hydraulic turbines
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GB/T 15468-2020: Fundamental technical requirements for hydraulic turbines---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT15468-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.140
K 55
Replacing GB/T 15468-2006
Fundamental technical requirements for hydraulic
turbines
Issued on. JUNE 02, 2020
Implemented on. DECEMBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 8
4 Technical requirements... 30
5 Performance guarantee... 44
6 Basic functions of turbine control system... 48
7 Scope of supply and spare parts... 49
8 Data and drawings... 51
9 Factory inspection and testing... 53
10 Nameplate, packaging, transportation and storage... 58
11 Installation, operation, maintenance, acceptance test... 60
Appendix A (Normative) The efficiency correction formula of the reaction turbine
... 62
Appendix B (Normative) The efficiency correction formula of impulse turbine 64
Appendix C (Normative) Recommended evaluation area for peak-to-peak value
of relative vibration displacement of main shaft... 67
Appendix D (Informative) Instruments for basic configuration of hydraulic
turbine... 68
Appendix E (Informative) Spare parts list of hydraulic turbine... 69
1 Scope
This standard specifies the performance guarantee, technical requirements,
scope of supply, inspection and test items for the design and manufacture of
hydraulic turbine products; proposes the requirements to be followed, for its
packaging, transportation, storage, installation, operation, maintenance.
This standard applies to hydraulic turbine products, that meet one of the
following conditions.
a) The rated power is 10 MW and above;
b) For Francis and impulse turbines, the nominal diameter of the runner is
1.0 m and above;
c) For Kaplan, Deriaz and bulb turbine, the nominal diameter of the runner is
3.0 m and above.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-
2008, ISO 780.1997, MOD)
GB/T 2900.45 Electrotechnical terminology - Hydroelectric powerplant
machinery (GB/T 2900.45-2006, IEC/TR 61364.1999, MOD)
GB/T 3323.1 Non-destructive testing of welds - Radiographic testing - Part
1.X-and gamma-ray techniques with film
GB/T 8564 Specification for installation of hydraulic turbine generator Unit
GB/T 9239.1 Mechanical vibration - Balance quality requirements for rotors
in a constant (rigid) state - Part 1.Specification and verification of balance
tolerances (GB/T 9239.1-2006, ISO 1940-1.2003, IDT)
GB/T 9797 Metallic coatings - Electroplated coatings of nickel plus chromium
and of copper plus nickel plus chromium (GB/T 9797-2005, ISO 1456.2003,
IDT)
3 Terms and definitions
The terms and definitions as defined in GB/T 2900.45, as well as the following
terms and definitions, apply to this document.
3.1 Characteristic water level of hydropower station
3.2 Gross head of hydropower station
3.3 Turbine head
3.3.1
Head
The effective head of the hydraulic turbine, which is the total unit energy of
the high and low pressure reference cross-section of the turbine.
Note. The unit is meter (m).
4 Technical requirements
4.1 General requirements
4.1.1 The design and manufacture of hydraulic turbines shall be based on the
characteristics and basic parameters of the hydropower station, to optimize the
type and main parameters of the turbine, to ensure the safe, reliable, stable,
efficient operation of the turbine.
4.1.4 For the design of hydraulic turbine, it shall provide the type, layout, model,
as well as the following basic parameters.
4.1.5 The following technical documents shall also be given for the design of
the turbine.
4.1.6 The efficiency correction of the reaction turbine is to be corrected,
according to the formula in Appendix A. The efficiency of the impulse turbine is
generally not corrected; however, if correction is required, it shall be carried out
in accordance with Appendix B.
4.2 The structure and materials of the main components
4.2.1 General requirements for structural design
4.2.1.6 The standard parts and components of hydraulic turbines shall ensure
their universality, for example, use runner whose torque is transmitted by friction;
nozzles, needles shall be interchangeable.
4.2.1.7 The allowable continuous running time of the turbine, at the maximum
runaway speed, shall not be less than the allowable runaway time of the
supporting generator. Meanwhile, it shall be ensured that the rotating parts of
the turbine NEITHER produces harmful deformation NOR causes collision and
damage. Facilities shall be provided to prevent the turbine from exceeding the
allowable runaway time.
4.2.1.22 The metal volute of the reaction turbine and the water distribution pipe
of the impulse turbine, may be subjected to a pressure test, according to the
requirements of the contract.
4.2.2 Working stress and safety factor
4.2.2.7 Unless otherwise specified, where there is no prestressing requirement,
the pre-tightening force shall not be less than 2.0 times the maximum working
load of the connected object, under normal working conditions and transitional
working conditions, which is converted to the axial load of the bolt.
4.3.4 Impulse turbine
4.3.4.1 It shall be possible to assemble, disassemble, replace the runner of the
impulse turbine, without disassembling the generator.
4.3.4.2 The runner shall be subjected to dynamic response analysis, to avoid
resonance.
5 Performance guarantee
5.1 Warranty period
The warranty period of the product is two years, from the date when the turbine
is put into commercial operation, OR three years, from the date of delivery of
the last batch of goods, whichever expires first.
5.2 Steady-state hydraulic performance
5.3.3 When the content of sediment in the water is high, the abrasion damage
of the turbine shall be guaranteed.
5.4 Vibration
5.5 The stable operating range of turbine
5.5.1 Within the range of maximum and minimum heads, which are specified in
4.1.4, the power range for stable operation of the turbine is in accordance with
Table 5.
5.7 Water leakage of guide vanes or nozzles
5.7.1 Under the rated water head, for the newly commissioned unit, the water
leakage of the guide vanes of the cylindrical arrangement shall not be greater
than 0.3% of the rated flow of the turbine; the water leakage of the guide vanes
of the conical arrangement shall not be greater than 0.4% of the rated flow of
the turbine.
5.8 Noise
When the turbine is operating normally within the stable operating range, the
noise, which is measured 1 m above the enclosure of the impulse turbine, shall
not be greater than 85 dB(A). The noise, which is measured within 1 m around
the runner chamber of the bulb turbine, shall not be greater than 90 dB(A). The
noise, which is measured 1 m above the floor of the turbine pit for other types
of units, shall not be greater than 95 dB(A). The noise, which is measured 1 m
away from the manhole of the tail water tube, shall not be greater than 95 dB(A).
5.9 Water thrust
For the reaction turbine, it shall guarantee the maximum forward water thrust
and maximum reverse water thrust, under normal working conditions and
transitional working conditions.
6 Basic functions of turbine control system
6.1 The instruments, which are equipped on the hydraulic turbine equipment
(see Appendix D), should be installed on a special panel.
6.4 When one of the following situations (but not limited to) occurs, the hydraulic
turbine shall be able to automatically accident or emergency shutdown.
7 Scope of supply and spare parts
7.1 Scope of supply
7.1.1 For Francis turbine, it includes tail water tube's metal lining, metal volute
and volute extension (if any), seat ring, base ring, water guiding mechanism,
thrust bearing bracket (if any), cylindrical valve system (if any), runners, turbine
shafts, water guide bearings, working seals, overhaul seals, turbine pit linings,
connections between parts, turbine pit lighting devices, air supplement systems,
pedestrian pedals and handrails, portable overhaul platforms in tail water tube,
drainage equipment, other supporting equipment, etc.
7.1.4 For the impulse turbine, it includes the metal lining of the tail water sump,
water stabilizing grid, water distribution ring pipe, enclosure, enclosure cover,
nozzle (including the nozzle ring, nozzle port, nozzle tube, needle, needle
servomotor, protective cover, etc.),
7.1.6 Piping and its accessories. All oil pipes, air pipes, water pipes, water
supply equipment for main shaft seal, connectors, brackets, which are required
in or between the parts within the scope of the contract.
7.1.7 Dedicated tools and special tools, which are required for installation and
maintenance.
7.1.8 The instruments and equipment, which are required for the acceptance
test of the prototype turbine, shall be negotiated between the supplier and the
buyer.
7.3 Spare parts and components
For the items and quantities of spare parts and components for hydraulic
turbines, they are selected with reference to Tables E1, E2, E3, E4 in Appendix
E. Meanwhile, it shall be specified in the contract, between the supplier and the
buyer.
8 Data and drawings
8.1 Delivery time and quantity
The supplier shall submit the drawings and documents to the buyer; the delivery
time and quantity shall be stipulated in the contract. Meanwhile, it shall provide
the purchaser and the power station design unit, with the electronic files of the
final drawings and materials, which are specified in the contract.
8.2 Key items
8.2.1 Layout drawing of hydraulic turbine and its auxiliary equipment, regulation
guarantee calculation report.
8.2.5 The relationship diagram BETWEEN guide vane opening or rotation angle
or nozzle stroke AND servomotor stroke; the basic force data; other important
calculation reports of the turbine, etc.
8.2.6 The technological process, drawings, documents related to the
arrangement, assembly, welding, processing of the turbine and its auxiliary
equipment on the site.
8.2.7 Control and monitoring. Installation and layout diagrams of various panels
and automation equipment; automatic operation of hydraulic turbines and
system diagrams of oil, gas, water; configuration diagrams of hydraulic turbine
measuring instruments, etc.
9 Factory inspection and testing
9.1 It shall provide the exit-factory qualification certificate, material chemical
composition, mechanical performance report, for each key part of the turbine.
Meanwhile they shall be inspected, according to the inspection items, which are
stipulated in the contract;
9.2 The pre-installation of the hydraulic turbine shall be carried out, in
accordance with the contract or technical agreement. For the relevant parts of
the turbine, that cannot or is difficult to be pre-installed in the supplier’s
workshop, after the supplier and the buyer have reached an agreement, they
can be moved to the site according to GB/T 8564 AND with reference to the
supplier’s relevant requirements. The supplier is responsible for technical
guidance.
9.4 The inspection and test items of the key components of the hydraulic turbine,
in the manufacturing process, are as shown in Table 6, Table 7, Table 8, Table
9.The items, that the purchaser participates in the inspection and test, shall be
implemented in accordance with the contract.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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