The state of hydraulic piston pump bearing in special environment

At the beginning of the equipment, it will take into account the special circumstances that will be encountered in its work process, in order to prevent the card machine, there will be preventive measures. Hydraulic pump is an important component of the equipment, the design and manufacture is to take into account this layer, Xiaobian today and we introduce the special environment of hydraulic piston pump bearings.

HF (H:Hydraulic fluid hydraulic oil: F:fire-resistant nonflammable) hydraulic meson is used in the hydraulic system operating in high temperature flammable environment. For example, the hydraulic meson used in the steel plant is HFC "water ethylene glycol" working fluid. Compared with the mineral oil-based hydraulic fluid, the working fluid has poor viscosity / temperature characteristics. The ability of HF oil to remove air and dirt is not strong, and the lubrication characteristics are also very different from mineral oil-based hydraulic oil.

The clearance friction abrasive wear, erosion and rolling bearing fatigue has produced pollution particles, caused by the new technology data so the German Rexroth production E- series of hydraulic piston pumps and motors has been adjusted according to the characteristics of HF working fluid by the use of the piston pump shaft bearing with special bearing generation "RR coating.

(bearing Rrcorrotect corrosion resistant coating), but this generation has "RR" coating bearing life is less than 50% of mineral oil-based hydraulic oil. (HFD anhydrous oil, phosphoric acid is not in this range)

There is a SL type UCHIDA, NABCO, KAYABA, heavy NACHI, DAIKIN, MOOG, the German Rexroth designed for long-term work under high pressure bearing long life hydraulic pump, SL type pump with hydrostatic balance is used long life heavy bearings, compared with the standard type pump, "SL" type pump long service life, UCHIDA, NABCO, hydraulic pump KAYABA, NACHI, DAIKIN and MOOG can work for a long time under high pressure.

In 31. 5Mpa, soft life nominal rotation and viscosity of 36m square meters /s for 10000h hours. The hydraulic pump UCHIDA, NABCO, KAYABA, NACHI, DAIKIN, MOOG has a special U oil port for flushing bearings,

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