The reasons and settlement of PPI compressor hydraulic oil cut-off;

Preparation Technology of a Kind of New Hydraulic oil for General Equipment;

Analysis of side effect on the hydraulic oil to the hydraulic system;

Investigation on rapid contamination analysis of in-use hydraulic fluid by electrical conductivity;

Study on site measurement of water content in lubricating oil and hydraulic fluid for ships

The service property of high performance hydraulic fluids increases greatly along with the application of group Ⅱ,group Ⅲ base Stocks, the oxidation time of long service life hydraulic fluid is in excess of 5 000 h ,multigrade hydraulic fluid has significant effect of energy-saving at high & low temperature,and high cleanliness hydraulic fluid can protect the hydraulic servomechanism effectively.

After examing the basic characteristics of hydraulic pressure oil for warships in common use and combining features of hydraulic pressure system,this paper presents the selection rules of variety,viscosity and clear degree of hydraulic pressure oil for warships.

The main type and damage of pollution from hydraulic pressure oil are analyzed,as well as some measures to solve the pollution are pointed out.

According to the theory of wear-self-compensation and aiming at the popular wear problems and serious results of mechanical engineering and products, additives ZSA and ZSC were developed to provide excellent wear-self-compensation tribological effect for tin bronze/hard chromium-plated 45 steel rubbing pairs in hydraulic pressure oil.

Stability calculating model of slim hydraulic cylinder;

The Analyzing and Eliminating of Hydraulic Cylinder s Faults;

To solve the problems of bending and distortion of pistons in the hydraulic cylinders during the operations of hydraulic roof supports,detailed calculation and analysis have been carried out on the piston bending stability and the piston diameters which satisfy the design requirement have been worked out.