GB/T 41894.2-2022 English PDFUS$244.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 41894.2-2022: Ships and marine technology - Determination of the shaft power of ship propulsion systems by measuring the shaft distortion - Part 2: Optical reflection method Status: Valid
Basic dataStandard ID: GB/T 41894.2-2022 (GB/T41894.2-2022)Description (Translated English): Ships and marine technology - Determination of the shaft power of ship propulsion systems by measuring the shaft distortion - Part 2: Optical reflection method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: U40 Classification of International Standard: 47.020.20 Word Count Estimation: 14,173 Date of Issue: 2022-10-14 Date of Implementation: 2022-10-12 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 41894.2-2022: Ships and marine technology - Determination of the shaft power of ship propulsion systems by measuring the shaft distortion - Part 2: Optical reflection method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Ships and marine technology -- Determination of the shaft power of ship propulsion systems by measuring the shaft distorsion -- Part 2.Optical reflection method ICS 47.020.20 CCSU40 National Standards of People's Republic of China Ship and Offshore Technology by Measuring Shaft Deformation Determining the shaft power of the ship's propulsion system Part 2.Optical reflection method (ISO.20083-2.2019, IDT) Published on 2022-10-12 2022-10-12 Implementation State Administration for Market Regulation Released by the National Standardization Administration forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is part 2 of GB/T 41894 "Determination of Shaft Power of Ship Propulsion System by Measuring Shaft Deformation in Ships and Offshore Technology" point. GB/T 41894 has released the following parts. --- Part 2.Optical reflection method; --- Part 3.Elastic vibration method. This document is identical to ISO.20083-2.2019 "Ship and Offshore Technology Determination of Shaft Power of Ship Propulsion System by Measuring Shaft Deformation" Rate Part 2.Optical Reflection Method. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Marine Machinery Standardization Technical Committee (SAC/TC137). This document is drafted by. China Shipbuilding Industry Research Institute of Comprehensive Technology and Economics, Guangdong Institute of Intelligent Robots. The main drafters of this document. Qi Chao, Wang Huijun, Zhao Chenning, Ma Qiang, Wang Cong, Lao Yijia, Chen Huiling, Zhang Yue, Yang Lian, Yang Qianqian, Zhang Guojun, Zhao Jin, Zhou Xiaoxiao.IntroductionChoosing the optimum power for the main engine of the ship is very important for the ship owner as it greatly affects the operation, maintenance and management of the ship cost. Measuring the output power of a ship's main engine is important to ensure the efficiency of the ship. Methods for measuring host output power include. a) measure the deformation of the drive shaft; b) Determination of fuel consumption; c) Observe the host indicators, such as cylinder pressure, etc. Among these methods, it is a common measurement method to determine the shaft power of ship propulsion system by measuring the shaft deformation. measured by this method Shaft power is designed to. a) Provide measurement data of the output power of the main engine of the ship; b) provide relevant information on the best speed of the ship; c) select the optimal host operating characteristics; d) estimated repair and maintenance costs; e) Monitoring the operation of large propellers. GB/T 41894 "Determination of Shaft Power of Ship Propulsion System by Measuring Shaft Deformation for Ships and Offshore Technology" is intended to consist of the following parts. --- Part 1.General. The purpose is to establish the general principle of determining the shaft power of the ship's propulsion system by measuring the shaft deformation. --- Part 2.Optical reflection method. The purpose is to establish the determination of shaft work of ship propulsion system by measuring shaft deformation by optical reflection method. rate program. --- Part 3.Elastic vibration method. The purpose is to establish the determination of shaft work of ship propulsion system by measuring shaft deformation by elastic vibration method. rate program. Ship and Offshore Technology by Measuring Shaft Deformation Determining the shaft power of the ship's propulsion system Part 2.Optical reflection method1 ScopeThis document establishes procedures for determining shaft power in marine propulsion systems by measuring shaft deflection using optical reflectors. This article The article gives the measurement principle, device composition and calculation method. This document also describes the determinants of measurement accuracy, including calibration procedures, and refers to Onboard documentation of the equipment is determined.2 Normative referencesThere are no normative references in this document.3 Terms and DefinitionsThe following terms and definitions apply to this document. 3.1 shaft The propeller shaft or intermediate shaft that transmits engine power to the propeller and is fitted with a shaft dynamometer measuring element. 3.2 shaft torque The rotational torque generated by the engine is transmitted to the shaft to drive the propeller in rotation. Note. expressed in Newton meters (N m). 3.3 shaft power shaftpower Ps The power generated by the engine is transferred to the shaft to drive the propeller in rotation. Note. Expressed in kilowatts (kW).4 Measuring principleShaft dynamometers are instruments that measure shaft rotational speed and shaft torsional deformation caused by shaft torque. Shaft power (PS) is calculated according to formula (1). PS= 2πNQ 60 × (1) where. N ---shaft speed, the unit is revolution per minute (r/min); ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 41894.2-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 41894.2-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 41894.2-2022_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 41894.2-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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