Multi-stage pump arrangement, has three pumps whose pressure sides are connected with common load line for adjusting high volume flow, where two of pumps are parallely connected for adjusting high pressurizing medium volume flow

摘要

The pump arrangement (1) has three pumps (2, 4, 6) and a valve arrangement, where the pumps (2, 6) are parallely connected for adjusting a high pressurizing medium volume flow. A suction side of the pump (6) is connected with a pressure side of the pump (2). A pressure side of the pump (4) is connected with a tank. The pressure sides of the pumps (2, 4, 6) are connected with a common load line (32) for adjusting a high volume flow. The pump (6) has reduced delivery volume than other two pumps (2, 4).