In this paper an innovative design solution of a vane pump integrated with an electric motor is presented. In the proposed solution the double vane pump is embedded into the rotor of electric permanent magnets motor (BLDC). CFD simulations of the flow have been carried out to analyze the flow in the pump crossover areas and to avoid the cavitation phenomena at the inlet channel. Results of experimental investigations of the motor pump assembly prototype are presented.

In this paper, the results of the analysis of the forces acting on vanes in a double-acting vane pump with an integrated electric drive have been presented. In the new motor pump unit, the pump is assembled inside the rotor of the electric motor. A dynamic model representing the vane movement has been developed considering the impact of pressure load distribution, vane support forces and friction forces. The loss of contact between the vane head and the cam ring lead to the noise and reduction of the volumetric pump efficiency. The dynamic model which describes the vane motion and contact between the vane tip and cam ring has been solved using MATLAB software. The influence of load distribution, pump design and operational parameters on the vane dynamics has been analysed.

The paper presents results of research on the transmission of fluid borne noise in reservoir filled with fluid. This type of transmission of vibrational energy in the fluid occurs in fluid power units, in which hydraulic pumps are immersed in the liquid in the tank i.e. in the vertical mounting of the electric motor on the reservoir. There are vibrating elements submerged in the fluid like pumps, pipe elements, filters, etc. Due to the vibration of these elements fluid borne noise will be generated which will be transmitted to the tank structure. The transmission of fluid borne noise is dependent on natural frequencies of the tank structure. Based on model investigations, the mechanism and factors influencing the intensity of transmission of fluid borne noise in a reservoir were presented. The results of simulations with FEM were compared with the results of experimental investigations.