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GB/T 15468-2020: Fundamental technical requirements for hydraulic turbines Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 15468: Historical versions
Similar standardsGB/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/GBT15468-2020GB 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 ContentsForeword... 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... 691 ScopeThis 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 referencesThe 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 definitionsThe 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 requirements4.1 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 guarantee5.1 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 system6.1 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 parts7.1 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 drawings8.1 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 testing9.1 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. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 15468-2020 be delivered?Answer: The full copy PDF of English version of GB/T 15468-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 15468-2020_English with my colleagues?Answer: Yes. 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