Overheat of Turbocharger of 100KW Weichai Genset

Jul. 20, 2021

During the using 100KW Weichai diesel genset, the turbocharger maybe overheat. What's the matter? Now generator manufacturer Dingbo Power analyzes the reasons and solutions for you.

 

1. Reasons of overheat failure of turbocharger

A.If 100KW Weichai genset is overloaded for a long time, it will cause incomplete combustion of fuel, high exhaust temperature, local overheating of turbocharger, dull noise and black smoke from exhaust pipe.

B. If the oil pressure is low, it will cause insufficient lubrication on the friction surface of the turbocharger, accelerate the wear, improve the bearing clearance, and greatly worsen the lubrication; It not only leads to insufficient cooling of the turbocharger, the temperature rate of overspeed increases, but also reduces the viscosity of the oil and further deteriorates.

C. The deterioration of engine oil and improper adjustment of cooling water temperature (no more than 93 ℃ full load) are also the causes of overheating of turbocharger.

D. When the fuel supply advance angle of diesel engine is too small, the exhaust temperature is too high, resulting in the turbochargers speed is too high and the temperature rises.

E. The decrease of boost pressure leads to the decrease of air flow and the increase of turbocharger temperature.

F. There is air leakage between the outlet of compressor and the inlet of cylinder head, which leads to the abnormal operation of supercharger.

G. The intercooler is blocked, which makes the intake pressure and flow insufficient and causes the turbocharger to overheat.


 100KW Weichai Genset


2. Solutions for overheat of turbocharger of 100kw Weichai automatic diesel generator.

The above matters should be paid attention to in order to avoid turbocharger failure of diesel engine.

A.In strict accordance with the operating procedures and check the working state, accurately judge the working state of the diesel engine (vibration, noise, exhaust color, water leakage, etc.) to provide clues for finding the fault;

B.Do maintenance work and follow maintenance plan.

C.Grasp the characteristics of the fault, the harm and the corresponding disposal means, in order to avoid serious accidents.

D.Trouble shooting in time, until the problem has been solved, and then start the diesel engine to avoid further damage.

 

Turbocharger is widely used in engine for diesel generator set. But turbocharger can increase power and improve the performance of diesel generator. Turbocharged engine has obvious power advantages. The maximum power output of the same displacement can be more than 40% comparing with naturally aspirated engine. Compared with naturally aspirated engine, turbocharged engine has more strict requirements on working environment and maintenance.

 

1) Check the intake and exhaust pipes of the engine: whether the air filter is clean; Check whether there are sundries in the air inlet pipe of the compressor and the exhaust pipe of the engine in front of the turbine, and whether the joint and the clamp screw are loose.

2) Check the oil inlet and return pipes of turbocharger: check whether the oil pressure meets the design requirements, whether the oil and oil filter are dirty or deteriorated, whether there are impurities in the oil pan, and whether the oil level meets the requirements; Check whether the oil inlet pipe and oil return pipe are bent and blocked, and whether the sealing gasket is deformed and corroded (it is strictly forbidden to apply silica gel on the gasket of oil inlet pipe).

3) Matters needing attention during assembly.

a.The opening of the sealing ring must face the oil inlet direction, and the opening of the retaining ring must face the oil return direction.

b.During assembly, the turbine shaft, oil seal, positioning thrust sleeve and the dynamic balance line on the pressure impeller must be aligned.

c.Tighten the lock nut on the turbine shaft, the connecting screw between the turbine housing and the intermediate housing, and the pressing plate screw according to the specified torque.

d.It is strictly forbidden to adjust the bypass valve and bend the pull rod of the bypass valve.

e.Before replacing the turbocharger, oil should be added into the oil inlet pipe.

 

Guangxi Top Power Equipment Manufacturing Co., Ltd. was established in 2006. It is a Chinese diesel generator brand OEM manufacturer integrating design, supply, debugging and maintenance of diesel generator sets. The company has strong technical research and development strength, advanced manufacturing technology, modern production base, perfect quality management system, and sound after-sales service guarantee. It can be customized according to customer needs of 30KW-3000KW, various specifications of ordinary type, automation, automatic switching, four protections And three-remote monitoring, low-noise and mobile, automatic grid-connected diesel generator sets with special power requirements. Contact us by email dingbo@dieselgeneratortech.com. 

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