The Research of the Super High Pressure Cylinder on Design of Wall Size

2011 ◽  
Vol 121-126 ◽  
pp. 1147-1150
Author(s):  
Yu Xian Zhang ◽  
Li Fu Wang ◽  
Fang Yao
Keyword(s):  
High Pressure ◽  
Pressure Vessel ◽  
Equivalent Stress ◽  
Quantitative Relationship ◽  
Thick Wall ◽  
High Pressure Cylinder ◽  
High Pressure Vessel ◽  
Inner Pressure ◽  
Pressure Cylinder ◽  
Inside Wall

The characteristics of stress distribution in high-pressure vessel are analyzed at first. Then the formula of inner pressure is derived. Through analysis the formula, a conclusion that the maximal inner pressure the high-pressure vessel can support goes steady under the diameter ratio is more than 5. Then the formula of equivalent stress at the dangerous position (inside wall) in high-pressure vessel is educed according to the fourth strength theorem and the quantitative relationship in the vessel’s inside pressure and diametrical ratio and the fatigue limit further is founded. Finally, the advice that proper structure is adopted to improve the cylinder’s inner pressure when design thick wall high-pressure cylinder according to relationships as above. These advices have a definite directive significance for how to design and use vessel effectively.

Numerical Analysis on Delta-Ring Seal Structure of Ultra High Pressure Vessel Employed in Food Processing

2013 ◽  
Vol 303-306 ◽  
pp. 2839-2842
Author(s):  
Rong Li Li ◽  
Xiao Yong Liu ◽  
Shou Qin Zhang ◽  
Tao Li ◽  
Guo Jing Ren
Keyword(s):  
High Pressure ◽  
Numerical Analysis ◽  
Pressure Vessel ◽  
Food Processing ◽  
Residual Deformation ◽  
Full Field ◽  
High Pressure Vessel ◽  
Ultra High Pressure ◽  
Inner Pressure ◽  
Ring Seal

Due to the characters of the ultra high pressure vessel employed in food processing, a seal structure was introduced in this study. Then numerical analysis was performed using the larger finite element stress analysis software ansys12.0 for the stresses of the seal structure under internal pressure. In order to solve the contact question of delta-ring seal structure by using face-face contact model, a 3-D axisymmetric solid element was employed to calculate the stresses of the connected location among delta-ring, blind cover and end cylinder, the mises stresses in this structure were analyzed. Thus, the distribution nephograms of the stress on the contact surface were obtained in different conditions. Full-field plastic deformation of seal structure was generated when the inner pressure was larger than 300Mpa. At last, the reason for residual deformation was analyzed.

Modeling and Optimization of Ultra High Pressure Vessel With Self-Protective Flat Steel Ribbons Wound and Tooth-Locked Quick-Actuating End Closure

2008 ◽  
Author(s):  
Xin Ma ◽  
Zhongpei Ning ◽  
Honggang Chen ◽  
Jinyang Zheng
Keyword(s):  
High Pressure ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Design Method ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Peak Stress ◽  
High Pressure Vessel ◽  
Ultra High Pressure ◽  
Flat Steel

Ultra-High Pressure Vessel (UHPV) with self-protective Flat Steel Ribbons (FSR) wound and Tooth-Locked Quick-Actuating (TLQA) end closure is a new type of vessel developed in recent years. When the structural parameters of its TLQA and Buttress Thread (BT) end closure are determined using the ordinary engineering design method, Design by Analysis (DBA) shows that the requirement on fatigue life of this unique UHPV could hardly be satisfied. To solve the above problem, an integrated FE modeling method has been proposed in this paper. To investigate the fatigue life of TLQA and BT end closures of a full-scale unique UHPV, a three-dimensional (3-D) Finite Element (FE) solid model and a two-dimensional (2-D) FE axisymmetric model are built in FE software ANSYS, respectively., Nonlinear FE analysis and orthogonal testing are both conducted to obtain the optimum structure strength, in which the peak stress in the TLQA or BT end closure of the unique UHPV is taken as an optimal target. The important parameters, such as root structure of teeth, contact pressure between the pre-stressed collar and the cylinder end, the knuckle radius, the buttress thread profile and the local structure of the cylinder, are optimized. As a result, both the stress distribution at the root of teeth and the axial load carried by each thread are improved. Therefore, the load-carrying capacity of the end closure has been reinforced and the fatigue life of unique UHPV has been extended.

Exploring Autofrettage Process to Improve the Fatigue Life on High-Pressure Cylinder

2013 ◽  
Vol 457-458 ◽  
pp. 518-521
Author(s):  
Feng Ling Yang ◽  
Shi Jin Zhang
Keyword(s):  
High Pressure ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Fatigue Analysis ◽  
High Pressure Cylinder ◽  
Pressure Cylinder ◽  
Surface Variation ◽  
Life Improvement ◽  
Improve Fatigue Strength ◽  
Improve Fatigue

Autofrettage process is now widely used to improve fatigue strength of high pressure components. This paper focuses on the fatigue life improvement of the high-pressure cylinder treated by autofrettage process. In this process, a high pressure cylinder treated by autofrettage process has been simulated by using FEA software, and surface variation of the cylinder has been analyzed. To further understand this process, theoretical fatigue analysis has also been carried out.

A Stress and Strain Analytical Formula Applied in Low Alloy and High Strengthen Steel Material

2011 ◽  
Vol 213 ◽  
pp. 241-245
Author(s):  
Hong Wang ◽  
Yu Xian Zhang ◽  
Qing Xia Lin ◽  
Qing Hua Zhou
Keyword(s):  
Residual Stress ◽  
High Pressure ◽  
Pressure Vessel ◽  
Analytical Formula ◽  
Stress And Strain ◽  
High Pressure Vessel ◽  
Steel Material

In order to study the residual stress of the auto-frettagea super high pressure vessel effectively, a new stress and strain analytical formula is brought forward. It indicates that this analytical formula is more accurate under actual conditions for the steel applied in auto-frettagea super high pressure vessel through strict mathematical testimony. Subsequently, it describes how to establish this analytical formula and analyzes the analytical formula’s error through taking some material as an example. It illustrates that it is feasible and reliable to solve this new analytical formula basing on general tensile curves through this instance. The analytical formula is also of theoretical signification and engineering practical value in application.

Investigation on the Strength of Ultra High Pressure Vessel Cylinder With Self-Protective Flat Steel Ribbons Wound

2008 ◽  
Author(s):  
Xin Ma ◽  
Jinyang Zheng ◽  
Zhongpei Ning ◽  
Honggang Chen
Keyword(s):  
High Pressure ◽  
Pressure Vessel ◽  
Ultimate Load ◽  
Design Criterion ◽  
Potential Hazard ◽  
Unique Type ◽  
High Pressure Vessel ◽  
Ultra High Pressure ◽  
Load Carrying ◽  
Flat Steel

A unique type of self-protective Ultra-High Pressure Vessel (UHPV) cylinder with helically wound Flat Steel Ribbons (FSR) is proposed. The shielding properties of its self-protection in the hoop and axial directions of a FSR cylinder in the case of fracture failure, as well as quick-actuating of the tooth-locked end closure of this new vessel structure are both expounded. Based on its axial strength, a formula of the ultimate load-carrying capability of FSR layers is derived. The shielding function and self-protective capability of FSR layers to the UHPV cylinder are analyzed quantitatively in detail, and a design criterion is also defined. According to the formula and the design criterion defined in this paper, the predicted ultimate load-carrying capability of the FSR layers is 48.3% higher than that in previous references. Results from burst tests of 6 model vessels show that the brittle failure morphology of UHPV cylinders are changed with FSR layers and the potential hazard of failure of the UHPV is reduced. In addition, the cross fracture of the UHPV cylinder is shielded effectively and the derived formulation on the ultimate load-carrying capability of FSR layers is reasonable. UHPV cylinders designed according to the formula and the criterion can use much fewer FSR layers with the same shielding capability.

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