UJI “KETAHANAN LELAH DAN PENURUNAN GAYA PEGAS “ KATUP KOMPRESI AKIBAT “BEBAN OPERASI” PADA KATUP MOTOR DIESEL OUTPUT RATED 400 kW.

Authors

  • Yuhani Djaya Teknik Mesin Fakultas Teknik UPN”Veteran”Jakarta
  • Mohammad Rusdy Hatuwe

DOI:

https://doi.org/10.54378/bt.v11i2.114

Keywords:

Failure, cyclic, resilience, stability.

Abstract

Major role in the valve spring Diesel 4 strokes is able to guarantee the valve open and closed positions without loss of engine compression. Therefore, the spring must be able to maintain the style required by the valve in accordance with the needs of its operations. When the spring force reduction operations over the threshold, then the spring will be malfunctioning. Before this happens, the spring should be replaced or restored. Meanwhile, the replacement with a new one because it failed to cause unplanned downtime. To balance the needs of utilities and prevention of failure (downtime) is required prediction faill replacement, and therefore the rate of decline in the spring force is directly related to the characteristics possessed by every spring, then to determine the rate of decrease in the valve spring force necessary to test fatigue characteristics. To achieve these objectives, characteristics and fatigue testing is done with spring material Goodman line approach. These tests include the identification of test material in the form of a test spring spring material chemical composition and hardness test; namely to determine the tensile strength limit in the diagram Heigh and criteria preset limit or unpreset spring tired. Next proceed to test the rate of decrease in the spring force on the cyclic loading which is the subject of this study, in which the rate of decrease in the spring force test due to cyclic done to reach the threshold spring force on the round number above 107. The test results showed that the decrease in the spring force caused by the spring force on the rate of decline of about 6% cyclic loading is at about 300 hours of operating hours, the next spring force experienced stability.

References

Baumeister, T. (Ed.). (1978). Mark's Standard Handbook for Mechanical Engineers (8th ed.). New York: McGraw-Hill, Inc. (Original work published 1916)

Beuter, H. (2002). Handbook of Spring Design [Brochure]. Oak Brook, IL: Spring Manufacturers Institute, Inc. Handbook (10th

ed., Vol. 4, pp. 203-206). Metals Park, OH: ASM International

DeFord, R. (2006). The Importance of Spring Index. Springs, 45(1), 25-26.

Deutschman, A. (1975). Machine Design Theory and Practice. New York: Macmillan Publishing Co., Inc.

Hamrock, B. (1999). Fundamentals of Machine Elements. WCB/McGraw Hill.

Hayes, M. (2006). Compression Spring Equipment, Design, and Non-Axial Performance. Springs, 45(4), 63-64.

Sebastian, D. (2000). Compression, Extension, Garter and Torsion Springs [Brochure]. Oak Brook, IL: Spring Manufacturers Institute Inc.

Sebastian, D. (2000). Fundamentals of Spring Design: How to Pick a Spring Design, Spring Materials, Residual Stress, Fatigue, and Reliability [Brochure]. Oak Brook, IL: Spring Manufacturers Institute Inc.

Sebastian, D. (2003). Tolerancing and Testing: Guidelines for Spring Testing Tolerancing Guidelines [Brochure]. Oak Brook, IL:

Spring Manufacturers Institute Inc.

Shigley, J., Mischke, C., & Budynas, R. (2004). Mechanical Engineering Design. New York: McGraw-Hill. (Original work published 1963)

Stephens, R. (2001). Metal Fatigue in Engineering. New York: John Wiley & Sons, Inc.

Sularso, Kiyokatsu Suga (1994). Elemen Mesin, Dasar Perencanaan dan Pemilihan.

Published

2017-08-02