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GB/T 28695-2012: Standard of strength calculation for centrifugal drum
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GB/T 28695-2012: Standard of strength calculation for centrifugal drum

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ICS73.120 J77 National Standards of People's Republic of China Centrifuge drum strength calculation specifications Issued on. 2013-03-01 2012-09-03 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Symbol 1 2 drum hoop stress in the wall of the rotating drum 4 4.1 rotating drum hoop stress free wall of the drum 2 3 drum hoop stress within the walls empty drum is rotated 4.2 4.3 drum wall cylindrical drum by the centrifugal pressure load and other materials generated hoop stress 3 4.4 conical drum drum wall by the centrifugal pressure load and other materials generated hoop stress 4 Select various coefficients of 45 5.1 Strengthening hoop factor of 4 5.2 welded joints coefficient 5 5.3 aperture factor of 5 5.4 Coefficient of welded joints and openings 6 Apparent density reduction factor 5.5 due to the drum wall openings 6 6 tumbler strength evaluation 6 6.1 cylindrical drum hoop stress total 6 6.2 to the total stress conical drum ring 7 Allowable stress material 7 6.3 7 guiding principles of finite element analysis method 7 7.1 Basic Principle 7 7.2 Analysis Model 7 7.3 Analysis Software 8 7.4 Static Strength Check 8 Fatigue strength evaluation 8 8 Appendix A (informative) Summary of the drum strength calculation formula 9 Annex B (informative) Centrifuge Basket Calculation Example 11

Foreword

This standard rule according to GB/T 1.1-2009 given draft. This standard Annex A, Annex B is informative appendix. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee of mechanical separation (SAC/TC92) centralized. This standard is drafted by. Tianjin University, Hefei General Machinery Research Institute, Sichuan University. The main drafters of this standard. Tan Wei, Zhangde You, Chen. Centrifuge drum strength calculation specifications

1 Scope

This standard specifies the assessment hoop stress is calculated when the centrifuge drum rotating drum casing, select a variety of factors, drum strength, Finite Element Analysis Method of guiding principles and fatigue strength assessment. This standard applies to circumferential and axial bearing uniform thickness uniform cylindrical or conical filter drum or drum housing settlement. Drum can be lined, screen or without lining, mesh. Drum material must be ductile metal material of uniform composition, and has in the selection test Into account the operating temperature, the material medium. This standard does not apply to the centrifuge drum for the following conditions. a) the drum wall thickness ratio δ and radius/r1 > 0.15; b) Load the drum is less than the kinetic energy of 750J; c) motor drive home dehydrator; d) drum circumferential speed is greater than 300m/s; e) specific to the nuclear industry in the field of high-speed centrifuges.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. RT Test Method. Test Part 1 GB/T 228.1 metal material tensile GB/T 3075 metal fatigue test axial force control method JB4732 steel pressure vessel analysis and design standards JB/T9095 centrifuge separator Weldment forging NDT routine

3 Symbol

The following symbols apply to this document. a. Strengthening drum hoop height, m; A. drum hoop strengthen cross-sectional area, m2; b1, b2. drum wall adjacent two holes center distance, m; c. enhanced hoop spacing, m; d. hole diameter, m; e. reinforcing ring thickness (radial), m; G. Maximum allowable quantity (mass), kg; h. Drum effective height, m; H. conical drum bus length, m; K. weld and opening coefficients; K1. Coefficient of welded joints; ...