Abstract
To improve the abrasion resistance performance of the critical tribopairs within water hydraulic piston pumps, tribological characteristics of the stainless steel 17-4PH and 17-4PH coated with Cr3C2-NiCr, WC-10Co-4Cr, Cr2O3 and Al2O3-13%TiO2 sliding against carbon fiber reinforced polyetheretherketone (CF-PEEK) composite under water-lubricated condition were experimentally studied using a pin-on-ring test bench with different working conditions. It has been demonstrated by the experimental results that the tribological behaviors of CF-PEEK/cermet coatings tribipairs were better than that of CF-PEEK/17-4PH tribopair under water lubrication. However, the Cr3C2-NiCr coating could be damaged under high rotational speed. Due to the reaction film produced by the Al2O3-13%TiO2 and water, the CF-PEEK/Al2O3-13%TiO2 material combination exhibits more excellent tribological behaviors than other tribopairs lubricated with water, and could preferentially be used in water hydraulic piston pumps.
Highlights
Water hydraulic power transmission has been widely used in the food processing industry, chemical and pharmaceutical industry, water mist fire extinguishing and seawater reverse osmosis desalination system due to its environmental friendliness, cleanliness of working media, low operation cost and high efficiency [1,2,3,4,5]
Friction coefficients of carbon fiber reinforced polyetheretherketone (CF-PEEK) composite coupled with several cermet coatings in water under
It can be concluded that the large hardness difference between the CF-PEEK and cermet coatings could accelerate the wear of the soft CF-PEEK
Summary
Water hydraulic power transmission has been widely used in the food processing industry, chemical and pharmaceutical industry, water mist fire extinguishing and seawater reverse osmosis desalination system due to its environmental friendliness, cleanliness of working media, low operation cost and high efficiency [1,2,3,4,5]. It should be noted that all of the tribopairs in WHAPP are directly lubricated with water. There are some challenging problems in the development of high-reliability WHAPPs. For example, the bad lubrication, strong corrosiveness and low viscosity of water could lead to early failure of the critical tribopairs (such as the slipper/swash-plate, sliding bearing/cylinder, piston/cylinder, valve-plate/port-plate tribopairs) in WHAPP (as shown in Figure 1) [6]. The use of materials of the critical tribopairs in WHAPP with low friction and resistant to wear underwater lubrication condition is important
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