Transcription of Using Belleville To Maintain Bolt Preload - GPI
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Using Belleville To Maintain Bolt Preload - GPI
Using Belleville Springs To Maintain bolt Preload George P. Davet, Solon Mfg. Co. TABLE OF CONTENTS. 1. INTRODUCTION. What is a Belleville spring ? 2. PRINCIPLES OF Belleville SPRINGS. Why Does a bolt Loosen? The Joint Diagram Using Belleville Springs to Maintain bolt Preload Movement in Flanged Joints Bus Conductors and Differential Thermal Expansion 3. TESTING. Test of Bellevilles Used on a Bolted Joint Tests of Bellevilles Used on a Flanged Joint Conclusions of Flange Tests 4. Belleville SPRINGS IN PRACTICE. Designing a Live Loaded Joint System A Practice Problem 5. REFERENCES. 1. INTRODUCTION. What is a Belleville spring ? A Belleville spring is a conical shaped disc that will deflect (flatten) at a given spring rate when subjected to an axial load Fp (Figure 1). This rate is usually very high relative to a coil spring , which makes a Belleville an excellent candidate where large loads must be delivered through a short movement.
SPRINGS 2.0 Why Does a Bolt Loosen? After a bolted joint is assembled, some of the original preload is almost always lost. This happens because the components of the …
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