武汉理工大学：《船舶辅机》课程教学资源（PPT课件，英文版）3.3 Batch and continuous lubricating systems

3.3 Batch and continuous lubricating systems

3.3 Batch and continuous lubricating systems

3.3 Batch and continuous lubricating systems For small or medium units without a circulatory lubricating system, the oil is often treated on the batch system As large a quantity of oil as possible is drained from the engine at intervals and run into a heating tank, the system being replenished with clean oil at the same time The heated oil is run through the purifier and pumped back to the main oil tank

3.3 Batch and continuous lubricating systems • For small or medium units without a circulatory lubricating system, the oil is often treated on the batch system. • As large a quantity of oil as possible is drained from the engine at intervals and run into a heating tank, the system being replenished with clean oil at the same time. • The heated oil is run through the purifier and pumped back to the main oil tank

3.3 Batch and continuous lubricating systems For removing soluble sludge, a system combining the batch and continuous systems Is effective The used oil drains to a tank. where it is allowed to rest for about ten days The oil cools and any sludge settles. The oil is then drawn off, run through the purifier, and pumped to the clean oil tank

3.3 Batch and continuous lubricating systems • For removing solub1e sludge, a system combining the batch and continuous systems is effective. • The used oil drains to a tank, where it is allowed to rest for about ten days. • The oil cools and any s1udge settles. The oil is then drawn off, run through the purifier, and pumped to the clean oil tank

3.3 Batch and continuous lubricating systems When the oil in use shows signs of sludging, it is drained off, the clean oil is pumped into the system and the cycle re started The purifier is used on the continuous system all the time, except for the short period when the batch of oil from the dirty oil tank is being purified

3.3 Batch and continuous lubricating systems • When the oil in use shows signs of sludging, it is drained off, the clean oil is pumped into the system and the cycle re￾started. • The purifier is used on the continuous system all the time, except for the short period when the batch of oil from the dirty oil tank is being purified

Figure 3.4 Method of installing on Alfa-Laval purifier in the lubricating system of a diesel engine for continuous by-pass purification e l Sump tank for dirty oil from engine 2. Dirty oil to purifier 3. Heater 4. Pump 5. Hot water piping 6. Purifier 7. Purified oil 8 To waste

Figure 3.4 Method of installing on Alfa-Laval purifier in the lubricating system of a diesel engine for continuous by-pass purification 1.Sump tank for dirty oil from engine 2.Dirty oil to purifier 3.Heater 4. Pump 5.Hot water piping 6.Purifier 7.Purified oil 8.To waste

3.3 Batch and continuous lubricating systems Continuous bypass systems for diesel-engine installations are illustrated in Figures 3. 4 5 In Figure 3. 4(diesel engine) the bottom of the engine-sump tank is connected to the feed np of the pump he purifier by the pipeline e. a heater is fitted to the pining 7 in order to make the oil sufficiently fluid for centrifugal treatment especially when the engine Is cold

3.3 Batch and continuous lubricating systems • Continuous bypass systems for diesel-engine installations are illustrated in Figures 3.4. • In Figure 3.4 (diesel engine) the bottom of the engine-sump tank is connected to the feed pump of the purifier by the pipeline. • A heater is fitted to the pining in order to make the oil sufficiently fluid for centrifugal treatment, especially when the engine is cold

3.3 Batch and continuous lubricating systems The outlet for purified oil is connected to the top of the sump-tank by means of the return pipe. 蘸an The water and sludge outlet is connected to the waste by a pipe 7

3.3 Batch and continuous lubricating systems • The outlet for purified oil is connected to the top of the sump-tank by means of the return pipe. • The water and sludge outlet is connected to the waste by a pipe

3.3 Batch and continuous lubricating systems The feed pipe should preferably be connected to a supply of hot, fresh water This arrangement facilitates e55 the priming of the purifier bowl with water. and enables some of the dirt to be occasionally washed out from the bow

3.3 Batch and continuous lubricating systems • The feed pipe should preferably be connected to a supply of hot, fresh water. • This arrangement facilitates the priming of the purifier bowl with water, and enables some of the dirt to be occasionally washed out from the bowl

3.3 Batch and continuous lubricating systems In the case of small engines containing a rather small quantity of oil in their crankcases. a tank should be included in the system The oil required for filling the purifier bowl and pipe work, etc is drawn from this T tank the oil level in the engine thus remaining constant

3.3 Batch and continuous lubricating systems • In the case of small engines containing a rather small quantity of oil in their crankcases, a tank should be included in the system. • The oil required for filling the purifier bowl and pipe￾work, etc. is drawn from this tank, the oil level in the engine thus remaining constant