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(一)前言北京型3142号机车曾于1981年9月至1982年3月在大连内燃机车试验台上进行了全面的牵引热工性能试验。该型机车在线路运行期间,我们曾对包括3142号机车在内的六台北京型机车作了运用负荷率的调查,发现机车柴油机的水温普遍较低,均在70℃以下。在3142号机车进入试验台后的典型工况试验中(为初步了解该机车性能而进行的非正式牵引性能试验),我们亦发现水温偏低的情况。如机车以16手把位持续速度稳定运转,当环境气温控制在27～30℃时,高温风扇转速为1111转/分,柴油机出口水温为68℃;当环境气温为39～40℃时,高温风扇转速为1437～1448转/分,
(一) Preface Beijing Type 3142 locomotive had a comprehensive traction thermal performance test on Dalian Diesel Locomotive Test Bench from September 1981 to March 1982. During the operation of this type of locomotive, we conducted a survey on the load factor of six Beijing-type locomotives including locomotive No. 3142 and found that the water temperature of locomotive diesel engines was generally lower than 70 ° C. We also found that water temperature was low in the typical working condition test after the 3142 locomotive entered the test stand (an informal traction test for preliminary understanding of locomotive performance). For example, the locomotive runs steadily with 16 hands. When the ambient temperature is controlled at 27-30 ° C, the rotating speed of the high-temperature fan is 1111 rpm and the outlet water temperature of the diesel engine is 68 ° C .; when the ambient temperature is 39-40 ° C, Fan speed of 1437 ~ 1448 rev / min,