In practical operation of the jacking oil system for some 300 MW units

several problems

such as low oil pressure

insufficient output of the oil pump

large vibration and noise of the jacking mechanism

and even burst of oil pipe and burn-out of bearing shoes etc.

have easily occurred

the causes are abrasion of plunger piece and leakage of sealing parts in the jacking oil pump.For this

some retrofit measures have been put forward

e.g.selecting imported plunger pump with reliable performance to replace the home-made plunger pump installed originally in jacking oil system of the supercritical units

installing filters at inlet and outlet of the jacking oil pump to ensure cleanliness of oil quality

preventing bearing from abrasion

and installing non-return valve at outlet of jacking oil pump etc..After implementation

the above-mentioned problems occurred in jacking oil system have been solved.