Research and Analysis of Cooling System for Diesel Locomotive

Abstract

With the continuous development of diesel locomotives in the direction of single power, the heat dissipation of
the locomotive cooling system is getting bigger and bigger, and its performance directly affects the economy and
reliability of the locomotive. Due to the limitation of locomotive axle load and structural space size, there is a great
technical problem between the cooling system design and the arrangement of the cooling device and the overall
layout of the locomotive. The increase in the number of radiators, making the number of cooling system processes
are correspondingly increased, resulting in locomotive cooling system water resistance and water system pressure are
greatly improved. The traditional cooling system form and the radiator structure are diffi cult to meet the development
requirements of high power locomotive. Based on the conventional cooling system design method, a multi-process
radiator is proposed. The multi-process cooling system has the advantages of high cooling effi ciency, simple structure,
small auxiliary power consumption of the pump and high reliability of the cooling system components. In this paper,
the cooling system and its function, the existing cooling technology and the multi-process radiator are studied and
analyzed, and the three-process radiator and the single-process radiator are tested and compared. In this paper, a new
multi-process radiator structure scheme is proposed for the design requirements of CKD9 diesel locomotive cooling
system. The program eff ectively uses the radiator cooling water and cooling air temperature diff erence, to achieve the
purpose of increasing heat dissipation.