FIELD: transport.
SUBSTANCE: proposed invention relates to self-propelled surface rotor excavator, preferably in the form of road hoe, screw-rotor snow plough or open-cut combine, with cutter-drum capable to rotate around horizontal axis and with cutter-drum drive containing at least one electric motor installed inside the cutter-drum where electric motor stator and rotor are installed inside air- and/or dust-tight motor housing. It is proposed to provide cutter-drum drive motor located inside cutter-drum body with cooling device having closed liquid cooling circuit. Due to high heating capacity of suitable cooling liquid such as oil or water and glycol mixture, small volume flows are enough for liquid cooling circuit thus allowing small pipeline cross-sections. On the other hand, due to closed structure of liquid cooling circuit, it is possible to avoid any dust entering into cutter-drum drive as well as dust generation by exhaust air.
EFFECT: lower thermal load on cutter-drum drive without increase in dust load.
14 cl, 5 dwg
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