AIR COMPRESSING DEVICE FOR RAILWAY VEHICLE

摘要

An air compressing device for a railway vehicle, configured so that whether or not the replenishment of oil is required can be easily and accurately determined. An oil temperature regulation valve (26) has a body section (39), a valve element (40), a valve element drive section (41), and a restricted position communication section (42). The body section (39) has: a first port (43a) facing an oil recovery device (21); a second port (43b) facing the inlet section (25b) of an oil cooler (25); a third port (43c) facing the outlet section (25c) of the oil cooler (25); and a fourth port (43d) facing a compressor (12). The valve element (40) is switched between a circulation position and a restriction position by the valve element drive section (41) which operates independently according to the oil temperature, the circulation position being a position at which the first and second ports (43a, b) are communicated with each other and the third and fourth ports (43c, d) are communicated with each other, the restriction position being a position at which the first and fourth ports (43a, d) are communicated with each other. The restriction position communication section (42) causes the second port (43b) to communicate with the first port (43a) when the valve element (40) is at the restriction position.