Abstract
One of the steps in predicting the reliability of a system includes determining the failure rate of the system’s components. The latter is obtained on the basis of the data available to the manufacturer, experience in using similar systems, using statistical methods and technical literature. In practice, the starting point in the process of foreseeing the reliability of any technical system is the assumption of constant failure rates. The system components’ failure rates which are determined in this way represent the so-called nominal values. This value is commonly modified by taking into account operation loads and environment conditions under which the observed system component is supposed to operate. In most cases the quantitative values of these two factors result from the engineering assessment that is based on the data available to the manufacturer or the user and takes into account the inevitable effect of a number of subjective factors. Predicting reliability is a process of determining numerical values which show the probability that machinery or engine will meet previously set requirements. The basic objective of reliability prediction is to ensure timely maintenance. This paper discusses predicting the operational reliability of the rotary cup burner type SAACKE - SKV 60 in the marine steam boiler TPK/VIC 8.5/7.
Highlights
There are four sources of data for predicting the reliability of a system in the stage of development: manufacturer; experience in using similar systems; adequate statistical methods; technical literature.The system as a whole is the starting point when gathering the information necessary for reliability forecasting
The above mentioned procedure for predicting the reliability does not assume that the failure rate has to be constant
The rotary cup burner type SAACKE – SKV 60 providing the rotational fuel oil atomization is used for observing the fuel combustion, see Figure 1, according to (Instruction book, 2003)
Summary
When defining the rotary cup burner as a system, it is necessary to determine its components and their relationships. Joško Dvornik and Srđan Dvornik: Operational Reliability of the Rotary Cup Burner Type Saacke - SKV 60 of Marine Boiler. The components represent the subsystems of the rotary cup burner. A fault is defined as an occurrence of conditions that impede the rotary cup burner’s operation. The operational conditions determine the rotary cup burner’s working conditions. The maintenance conditions affecting the reliability of the rotary cup burner must be known before reliability prediction. The rotary cup burner’s reliability is obtained by introducing the values of the failure rates of the system components into the algorithm for calculating the reliability in a defined period of time
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