Effect of Texture on Total Energy Consumption of High Frequency Hydraulic Impact Piston Pair

Abstract

Limited by the influence of the traditional clearance seal structure on the leakage and friction loss of piston pair, the energy utilization ratio of the hydraulic impactor is difficult to improve effectively. To solve this problem, a novel micro-texture clearance seal structure of impact piston cylinder was proposed, and an integrated energy consumption evaluation index considering leakage and friction loss of impact piston pair was proposed. Based on the average Reynolds equation, a comprehensive energy consumption analysis model for a textured high-frequency hydraulic impact piston pair was established, and the influence of piston texture parameters on the comprehensive energy consumption under rated working conditions was studied. The results show that the cylindrical texture clearance seal structure provided an effective way to improve the energy utilization ratio of hydraulic impactor, with energy consumption 13~15% less than the traditional structure. Variation of area rates textured made the amplitude value of integrated energy consumption of the piston pair decrease by 4~15%, and the optimum area rate was 0.2~0.4. Depth ratio of texture could also reduce the integrated energy consumption of the piston pair, but the reduction range was small.

Effect of Micro-Dimple Texture on the Tribological Performance of Brass with Titanium Nitride (TiN) Coating under Oil-Lubricated Conditions

“…Relevant studies have shown that the application of appropriate surface coating, appropriate surface texture, and the use of low viscosity lubricating oil and additives on the surface of the friction pair can reduce the friction loss by more than 60% during the long-term use of the friction pair (15-20 years) [15]. Therefore, surface texture has been widely used in cutting tools [16], plain bearings [17], internal combustion engines [18], plunger pumps [19], hydraulic cylinders [20], and other fields.…”

Thermo-Hydrodynamic Lubrication Analysis of Slipper Pair Considering Wear Profile

“…Although the structure of the slippers seems simple, its operation mechanism is complex. A lot of researchers focus on the boundary of velocity, pressure, and temperature as well as the profile of the running surface [1][2][3][4][5][6]. Based on the ideal rigid sealing land, the dynamic characteristics of the sliding pair were theoretically and experimentally analyzed by Harris [7]; there is a significant difference between the results of experimental and theoretical under the condition of large tilt angles [8].…”