OIL SUPPLY SYSTEM Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: oil supply system has oil pumps, three-position distributor and two- position spool valve. Chamber of spool valve end which is not spring loaded is connected with cooled oil line. Common oil suction line is connected via inter-land chambers to hot oil return line draining hot oil from line into oil tank. End control chambers are connected to oil pressure lines by means of pipes. Connected through inter-land chamber of oil pump pressure line are pipes running to oil consumers operating constantly or periodically. System may be provided with second three-position distributor of this distributor are connected to pipes. When there is no pressure of oil in the chamber, spring shifts spool valve to the second extreme position and it disconnects one line from other two lines. During operation of oil pumps, spring holds spool valve in the midposition and distributor feeds pressure oil from oil pump to lines separately. In case one of pumps is switched off, spool valve compresses one of springs and gets shifted to one of its extreme positions. Pressure oil is fed simultaneously to two lines from operating pump. Spool valve closes ports and disconnects one line from other. EFFECT: enhanced reliability. 2 cl, 2 dwg