Liu Yinshui, Defa Wu, Xiaofeng He and Li Zhuangyun
The purpose of this paper is to present some design guidelines for the selection of the materials of the main frictional pairs in a water hydraulic piston pump.
Abstract
Purpose
The purpose of this paper is to present some design guidelines for the selection of the materials of the main frictional pairs in a water hydraulic piston pump.
Design/methodology/approach
In the research, a specified test bench that can simulate the typical frictional pairs in a water hydraulic piston pump was built. The friction and wear behaviors of the three pairs in the pump with different materials combinations were tested on the test bench. The tested materials included metal, engineering ceramics and plastics. Some surface engineering technologies including plasma surface spray, laser clad and heat treatment were applied and tested. The matching schemes included hard‐to‐hard (such as ceramics‐to‐ceramics) and hard‐to‐soft (such as metal‐to‐plastics, ceramics‐to‐plastics).
Findings
Some principles for the materials selection in a water hydraulic piston pump were obtained. According to the test results, the combination schemes for the main frictional pairs in a water hydraulic piston pump were proposed.
Originality/value
A test apparatus that could simulate the movement of main frictional pairs in a water hydraulic piston pump more really than the other general materials machines was developed. Some materials including metal, engineering ceramics and plastics and some engineering technologies were tested. The research described here is an important foundation for the development of a water hydraulic piston pump.
Wang Dong, Li Zhuangyun and Zhu Yuquan
In recent years water hydraulic systems have become of major interest because of the human friendly and environmental safety aspects. The piston pump is one of the most frequently…
Abstract
In recent years water hydraulic systems have become of major interest because of the human friendly and environmental safety aspects. The piston pump is one of the most frequently used hydraulic units in recent engineering techniques. In a water hydraulic piston pump, poor lubrication is more likely to happen than in a oil hydraulic one because of differences in properties between water and oil. There are some key problems, such as corrosive wear and erosion, which are briefly investigated in this paper. Many new materials have been developed, which give longer life expectancies in water without corrosion and erosion. Recently, a new type of seawater hydraulic piston pump with better suction characteristics had been developed at Huazhong University of Science and Technology, China. Much of this research has concentrated on new materials, structure and experiments, which are also specially introduced in this paper.
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Dong Wang, Zhuangyun Li, Yuquan Zhu and Lijun He
The dynamic process of purifying emulsion using electromagnetic technique has been analyzed and studied via dynamics principles in this paper. Based on results, the purification…
Abstract
The dynamic process of purifying emulsion using electromagnetic technique has been analyzed and studied via dynamics principles in this paper. Based on results, the purification equipment has been developed and installed in a cold rolling mill. The basic structure characteristics of the purification equipment were described in detail. The equipment of purifying emulsion using electromagnetic technique is of excellent characteristics, which has a strong magnetic field, low flow velocity and multi‐pass of emulsion. Emulsion purified in this way can be recycled and used again with cost reduction. The equipment can be used in many fields such as cold rolling mill and machinery.