Conceptual design and selection of a bladder type pressure compensation system for subsea actuators to prevent failure due to seawater head

2021 ◽  
Author(s):  
Karan Sotoodeh
Keyword(s):  
Conceptual Design ◽  
Compensation System ◽  
Pressure Compensation ◽  
Type Pressure ◽  
Selection Of

scholarly journals Study on dynamic characteristics of underwater pressure compensator considering nonlinearity

2020 ◽  
Vol 11 (1) ◽  
pp. 183-192
Author(s):  
Songyu Li ◽  
Xinguang Du ◽  
Luyao Zhang ◽  
Ken Chen ◽  
Shuai Wang
Keyword(s):  
Steady State ◽  
Hydraulic System ◽  
Total Mass ◽  
Effective Area ◽  
Compensation System ◽  
Spring Stiffness ◽  
Pressure Compensation ◽  
The Relationship ◽  
State Pressure ◽  
Type Pressure

Abstract. The external pressure is the biggest problem faced by underwater hydraulic systems. The strength and sealing ability of the structure are facing enormous challenges. For this problem, the common solution is to use pressure compensation technology. The pressure of the seawater is transmitted to the inside of the hydraulic system through a pressure compensator, which equalizes the return pressure of the hydraulic system and the seawater pressure. The structure of the compensation system, the volume and dynamic characteristics of the compensator, and the compensation failure caused by hydraulic oil leakage will all affect the normal operation of the underwater equipment. Therefore, it is necessary to study the pressure compensation system. This paper analyzes the pressure characteristics of the rubber-bellows type compensator. The dynamic characteristic equation of the pressure is established. Due to the strong nonlinear nature of rubber, the finite element method is used to simulate the deformation process of the rubber-bellows type pressure compensator. The relationship between the volume variation and the spring displacement of the rubber-bellows type pressure compensator is calculated by FE simulation. The relationship is brought into the theoretical equation result to obtain the pressure characteristics of the compensator. Through the control variable method, the influence of damping, total mass, effective area and spring stiffness on the internal pressure of the compensator is obtained. According to the analysis result, the damping ratio should be appropriately increased to reduce the overshoot of pressure fluctuations in the design. Since the damping is difficult to control, the total mass of the end cap, the guide post, the rubber bellows and the spring can be minimized. It also reduces the quality of the equipment. The spring stiffness and effective area have a significant influence on the steady-state pressure. A softer spring should be used and the effective area should be increased as much as possible to reduce the final steady-state pressure.

Assessing Product Lifecycle Sustainability Using Uncertain Design Information at Conceptual Stage

2008 ◽  
Author(s):  
Q. Z. Yang ◽  
B. Song
Keyword(s):  
Conceptual Design ◽  
Product Information ◽  
Sustainability Assessment ◽  
Early Stage ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Design Decision ◽  
Fuzzy Evaluation ◽  
Product Lifecycle ◽  
Selection Of

This paper presents a hierarchical fuzzy evaluation approach to product lifecycle sustainability assessment at conceptual design stages. The purpose is to advocate the emerging use of lifecycle engineering methods in support of evaluation and selection of design alternatives for sustainable product development. A fuzzy evaluation model is developed with a hierarchical criteria structure to represent different sustainability considerations in the technical, economic and environmental dimensions. Using the imprecise and uncertain early-stage product information, each design option is assessed by the model with respect to the hierarchical evaluation criteria. Lifecycle engineering methods, such as lifecycle assessment and lifecycle costing analysis, are applied to the generation of the evaluation criteria. This would provide designers with a more complete lifecycle view about the product’s sustainability potentials to support decision-making in evaluation and selection of conceptual designs. The proposed approach has been implemented in a sustainable design decision-support software prototype. Illustrative examples are discussed in the paper to demonstrate the use of the approach and the prototype in conceptual design selection of a consumer product.

scholarly journals Selection of the variant solution of forest road alignment conceptual design using multicriteria optimisation

2009 ◽  
pp. 165-176 ◽  
Author(s):  
Bogdan Stefanovic ◽  
Ivan Bjelanovic
Keyword(s):  
Conceptual Design ◽  
Multicriteria Optimization ◽  
Linear Distribution ◽  
Forest Road ◽  
Multicriteria Optimisation ◽  
Technical Production ◽  
The Given ◽  
Selection Of ◽  
Design Construction ◽  
Building Parameters

One of the three studied variant solutions of forest road conceptual design was selected based on the linear distribution of criteria, as the method of multicriteria optimization. The selection was performed with 25 parameters classified as economic, technical, production and social criteria. The parameters of technical criteria were grouped into design, construction and building parameters. Based on calculated nominal values of parameters by the given criteria, their ranking, comparison, point rating and scoring, the selected most favorable solution was variant 1.

Subsea Chemical Storage and Injection- Qualification of HAMPRO 70V Pump

2021 ◽  
Author(s):  
Brede Andre Thorkildsen ◽  
Lachlan James McKenzie ◽  
Stein Følkner ◽  
Francois-Xavier Pasquet ◽  
Pierre-Jean Bibet
Keyword(s):  
Production Systems ◽  
High Reliability ◽  
Compensation System ◽  
Hydrocarbon Production ◽  
Transient Behaviour ◽  
Injection Pump ◽  
Pressure Compensation ◽  
Electrical Components ◽  
The Impact ◽  
Lubricant Performance

Abstract The development of Subsea Chemical Storage & Injection (SCS&I) technology is a continuation of the trend to move more of the hydrocarbon production systems subsea. This is driven by a need to make exploitation of remote resources profitable; unlock single-line long tie-backs and subsea to shore architectures, and to enable tie-ins with otherwise constrained topside infrastructure. The SCS&I System is also a significant contributor to the development of "All-Electric" subsea architecture where the umbilical is reduced to a power and communication cable only. TechnipFMC https://www.technipfmc.com/ and Total https://www.total.com/en are collaborating to develop and qualify the SCS&I technology components and system. In order to make the SCS&I technology competitive and field developments profitable, the reliability of the equipment is paramount. The HAMPRO 70V injection pump is one key component in the system for which high reliability must be ensured. The objective of the qualification program is to confirm the adequate performance of the HAMPRO 70V pump in the following areas: The reliability of the chemically exposed parts and the impact of chemical fluid cleanliness The reliability of the pump and motor rotating parts and the impact of lubricant performance The reliability of the electrical components The impact of transient behaviour on the pressure compensation system, rotating parts and electrical components Due to the similarity of design, smaller versions of the HAMPRO pump will also be qualified by the activities in the program.

A New Formal Method of Anticorrosion Design

2010 ◽  
Vol 44-47 ◽  
pp. 1449-1454 ◽  
Author(s):  
Peng Fei Zhao ◽  
Yi Zhang ◽  
Zong Bin Li ◽  
Xiao Yang Yuan
Keyword(s):  
Conceptual Design ◽  
Formal Method ◽  
Formal Model ◽  
Early Stage ◽  
Formal Description ◽  
Functional Requirements ◽  
Formal Reasoning ◽  
Sets Theory ◽  
Polychromatic Sets Theory ◽  
Selection Of

To solve the problem of anticorrosion design in early stage of manufacture, a formal method of anticorrosion design was proposed, and a formal model of conceptual design of anticorrosive materials was established by using hierarchical structure, individual color sets and unified color sets. Basing on the reasoning matrices which were established by using polychromatic sets theory, a formal reasoning method was proposed to realize the formal reasoning from the functional requirements to the selection of final scheme. This formal method of conceptual design for anticorrosion based on the polychromatic sets can make the design process of anticorrosion standardized, and facilitate the formal description of the reasoning process and its expression and operation in computer. The method made some useful explorationfor the CAPP integration design of anticorrosion.

scholarly journals Анализ характеристик полифункциональной системы компенсации давления реакторной установки РИТМ-200 атомных ледоколов нового поколения

2020 ◽  
Author(s):  
V.I. Korolev ◽  
I.I. Kostylev
Keyword(s):  
Analytical Model ◽  
Analytical Study ◽  
Compensation System ◽  
Primary Circuit ◽  
Static Characteristics ◽  
System Operation ◽  
Reactor Plant ◽  
Pressure Compensation ◽  
New Generation ◽  
First Time

В настоящее время на ОАО Балтийский завод успешно прошёл ходовые испытания атомный ледокол нового поколения Арктика . Здесь же строятся и находятся на различной фазе готовности два других аналогичных универсальных атомных ледоколов проекта 22220: Сибирь и Урал . На атомные ледоколы данного проекта устанавливаются реакторные установки IY поколения с интегральной компоновкой оборудования, разработанные АО ОКБМ Африкантов и используются другие инновационные разработки, которые ранее не применялись на плавучих объектах. В частности, впервые применяется полифункциональная система компенсации давления в реакторной установке. Практика эксплуатации атомных ледоколов с блочной компоновкой оборудования выявила ряд проблем, возникающих в данной системе. ОКБМ Африкантов приложила значительные усилия для устранения выявленных недостатков. В работе предлагается аналитическое исследование характеристик системы компенсации давления, влияющих на надёжность и безопасность реакторной установки и ледокола в целом. В частности, предложена аналитическая модель для исследования статических характеристик системы компенсации давления при различных режимах её работы. Оценены максимальные относительные отклонения давления в первом контуре при возможных вариантах реализации работы системы, в различных эксплуатационных ситуациях.At present, the nuclear icebreakers of the new generation Arctic has successfully passed the running tests at Baltic Plant. Two other similar universal nuclear icebreakers of project 22220 Siberia and Ural are also being built here and are at a different phase of readiness. Nuclear icebreakers of this project are equipped with IY generation reactor plants with integral layout of equipment developed by OKBM Afrikantov and innovative developments are used, which were not previously used at floating facilities. In particular, for the first time, a polyfunctional pressure compensation system in a reactor plant is used. The practice of operating nuclear icebreakers with a package arrangement of equipment has revealed a number of problems that arise in this system. OKBM Afrikantov has made considerable efforts to minimize these problems. The work proposes an analytical study of the characteristics of the pressure compensation system affecting the reliability and safety of the reactor plant and icebreaker as a whole. In particular, an analytical model is proposed to study static characteristics of the pressure compensation system under different modes of its operation. Maximum relative deviations of pressure in the primary circuit are found at possible variants of system operation provided for by operational situations.

scholarly journals Design, Analysis and Selection of Planar Parallel Mechanisms

2018 ◽  
Vol 7 (2.32) ◽  
pp. 44
Author(s):  
P Vijay ◽  
Dr A. Srinath ◽  
P Sri Naga Venkat ◽  
L Ranganath ◽  
P Appalaraju
Keyword(s):  
Conceptual Design ◽  
Design Analysis ◽  
Design Stage ◽  
Parallel Mechanisms ◽  
Single Degree ◽  
Conceptual Design Stage ◽  
Robot Hands ◽  
Selection Of

This paper presents the application of methodology for ten bar single degree mechanisms and selecting the best among them at the conceptual design stage itself. This saves lot of time for one wants to carry away analysis for getting desired output of the mechanism at the design stage. The methodology has been applied to Tiscler robot hands successfully and has obtained the best mechanism in motion distribution among the links of the chain. 

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