METHOD OF SUPPLYING TWO STAGE TYPE ROTARY SLIDING VALVE TYPE VACUUM PUMP WITH OIL AND ROTARY SLIDING VALVE TYPE VACUUM PUMP PROPER FOR EXECUTING SAID METHOD

摘要

PURPOSE: To provide such a lubrication oil supply method as can ensure the supply of sufficient oil to all spots requiring lubrication oil without using a separate pressure pump and also provide a two-stage rotary slide vane vacuum pump suitable for this method. CONSTITUTION: Oil is supplied from an oil pan 72 to an intermediate oil sump 27 arranged at a lever above a bearing location by prevacuum stages 11, 14 of a pump 1, while lubrication oil is guided from the intermediate oil sump 27 to separate lubricating locations 51, 54 by gravity and then returned from the lubricating locations into the oil pan 27.