| Popis: |
In this paper, the theory of flow and method of ripple control of the external gear pump group are studied with two same-parameter external gear pumps which are installed in the form of parallel and different phase. In this thesis, the external gear pump group is known as a low ripple gear pump group, and the theory of ripple control is based on the theory that two periodic and quadratic function curves of different phase superposition can reduce the amplitude variation. According to this method, the thesis starts to analyze the instantaneous flow of the low ripple gear pump group, moreover which are compared with the instantaneous flow of a single gear pump. Finally, it is concluded that the flow pulsation rate of low ripple pump group is equal to 1/4 times of a single pump flow pulsation. |
