ANALYSIS OF JACKING OIL SYSTEM FOR POWER GENERATING UNITS AND RETROFIT THEREOF

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.