| 摘要 |
#CMT# #/CMT# The unit has an electric motor (4) i.e. asynchronous variable-speed electric motor, for driving a hydro pump (2) e.g. interior gear pump, and a fan (36). The fan produces air flow (38), which cools the electric motor. An oil heat exchanger (32) cools a pressurizing medium, as the air flow stands in heat exchange with the pressurizing medium volume flow flowing through the oil heat exchanger. The speed of the electric motor is adjustable by a frequency inverter (20), which controls the speed for regulating pressure. #CMT#USE : #/CMT# Electric-motor pump unit for use in a hydraulic arrangement (claimed). #CMT#ADVANTAGE : #/CMT# The oil heat exchanger cools the pressurizing medium, as the air flow stands in heat exchange with the pressurizing medium volume flow flowing through the oil heat exchanger, so that the fan of the electric motor sucks the air flow by the oil heat exchanger, thus eliminating the need for a separate blower for cooling the pressurizing medium, reducing energy expenditure, reducing assembly expenditure and the installation space of the hydraulic arrangement, while reducing the interference of the hydraulic arrangement and avoiding damage to the motor by overheating. The electric motor drives the hydro pump and the fan, so that the fan does not need own drive. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic block diagram of a hydraulic arrangement. 2 : Hydro pump 4 : Electric motor 20 : Frequency inverter 32 : Oil heat exchanger 36 : Fan 38 : Air flow. |
