Pulsating Hydraulic Systems Study

摘要

The research investigation consisted of three phases: (a) An understanding of the theory and the present state-of-the-art of pulsating hydraulic systems; (b) Development of the basic techniques for analysis of pulsating hydraulic systems and simulation of a single-line pulsating hydraulic system on the analog computer; (c) Application feasibility of pulsating hydraulics to the B-52 hydraulic systems. A literature review and letter survey was accomplished to obtain an understanding of the theory and the present state-of-the-art of pulsating hydraulic systems. The results of the literature review and letter survey revealed that the literature available on pulsating hydraulics was extremely limited and little research has been done in this area. The basic analytical techniques were developed and used in simulating a single-line pulsating hydraulic system on the analog computer. During the research program, 47 different system configurations were evaluated. These configurations were evaluated for the change in system efficiency with respect to changes in the basic parameters of line lengths, line sizes, and pulsation frequencies. The pulsating hydraulic systems efficiencies were lower than those of continuous flow hydraulic systems. The B-52 application study concluded that the B-52, as designed, is not readily adaptable to pulsating hydraulic application. The present systems are functioning adequately and no real improvement in reliability or weight can be forecast. As a result of the research investigation, it was concluded that for certain applications, pulsating hydraulic system offers a definite advantage over continuous flow hydraulic systems. (Author)