Take Good Maintain To Thrust Bearings

Generally speaking, thrust bearing is used on the parts which under axial load side and in high speed, such as crane hook, vertical pump, Hoisting jack and speed reducer. Bearing ring, seat and roller are separate and could assembly and disassembly respectively.

Pump which used just now usually should change the grease after working 100 hours. Then you can change it about 500 hours once. Thrust ball bearing which use grease had better change the grease 1500 hours once, filling oil quantity should be moderate. The thrust ball bearing will be heating because without appropriate amount of grease. In general, the gas volume had better in half or even more.

Container for lubricating oil and lubricating grease should be clean and also in good daily sealing. Dust, debris and other sundries can not exist. So that it will not damage trust ball bearing. Motor thrust ball bearings often use sodium base grease. This nature of the lubricating grease can be resistant to high temperature. But it can dissolve in water. So don’t this lubricating grease in trust ball bearing.

Alloy Material Requirements For Journal Bearings

There are some requirements for journal bearings. Firstly, journal bearings should own enough fatigue resistance. The alloy material will have tiny cracks under alternating load if it has exceed fatigue strength, and even depth development until form alloy layer and  peeling. Secondly, journal bearings need enough wear performance. It includes seizure resistance, compliance, embedded possession and other performance. So journal bearings could be adapt to the negative effects, such as frequent cold starts, short oil, dirty oil or poor performance. Thirdly, Journal bearings had better own good corrosion resistance. Even the journal bearings works in the bad oil, its performance still be stable. Certainly, journal bearings must have enough bond strength in order to ensure that it will not drag shell under dual role.

At present, there are two methods to analysis and calculation nonlinear journal bearings. One adopt numerical methods to solve Reynolds equation directly. Another is analytic method. The former one has high precision, but the calculation speed is slow. The latter one is more easier.

Journal bearing is widely used in precision rotating machinery. Do nonlinear analysis to the radial journal bearing rotor system, and explore the the instability mechanism. It can not only offer theoretical basis to rotating machinery optimization design, mechanical control, fault monitoring and diagnosis, but also has important realistic significance.

Nozzle Ring In Turbocharger

Recent years, he automobile industry has been booming in China and it also has been new pillar to national economy. China has become largest auto market in the world in the year of 2010. With the greatly improved of car ownership, the difficult problem of environmental pollution brought by cars has become placed in front of people.

Some countries have put forward the automobile exhaust emission standards. Certainly China is not exception. The invention and application of turbocharger technology are not only decrease fuel consumption and improve the power of the engine, but also reduce the harmful gas in automobile exhaust components. So Countries of the world, especially the developed countries put a lot of manpower in turbocharger technology and manufacturing. Variable nozzle turbocharger technology is a new technology and has been widely used. It has broad future development.

Nozzle ring vane is the key component for variable nozzle turbocharger. At precent, there is nothing special processing equipment since this technique has just appeared. Now the main process of nozzle blade machining is casting or forging blank. Then machining and optical finishing. Generally speaking, people adopt the method of grinding wheel by hand in China. This is not efficient. However there are many technical personnels studying on the new method in order to improving efficiency.

Key Part To Turbocharger

The key part of turbocharger bearing which is named of lubrication type. It is also called full floating bearing. This bearing is in high working speed and with bad working environment. So ensure lubrication is very important.

Low oil pressure can lead suppling slowly and turbocharger will be in failure. It will not make such failures occur if the energy started normally. Oil supply will be slow when the energy stated at first time after changing the oil. At the same time, the bearing will be lack of oil lubricated. At this condition, you should idle running for about three minutes after starting. Certainly you could not improve the running quickly. While you also could not stop the energy suddenly on the highway or uphill. You must make the energy running for about one minute in order to prevent shorten oil to the turbocharger bearing. So drivers must obey the rule of manufacturers instructions. At the same time, you should be careful to oil quality.

In fact turbocharger is an air compressor. It increase the air intake quantity by compressed air. Sports cars which take part in the competition are usually equipped with turbocharger on the engine. That can make the car burst out more power. Energy is rely on the fuel combustion in the cylinder to generate power.

The entered fuel is limited by amount of air which sucked into the cylinder. You can only increase the output power from compressing more air if the energy has been in the best statue. And even improve combustion performance ability. Turbocharger is an only mechanical device that increase the output power under the same work efficiency.

Exhaust turbocharger Spare Parts

Exhaust turbocharger can improve the power of the engin by the energy of exhaust. Turbocharger can increase the power and torque without increasing engine output. The maximum power output of engine with turbocharger could be increased 40 percent and even more. At the same time, it also can improve the fuel economy and reduce exhaust emissions.

Exhaust turbocharger spare parts are mainly about centrifugal compressor, radial turbine and intermediates.

Centrifugal compressor is composed of intake population, compressor impeller, the compressor, compressor back cover and other parts. The compressor inlet is connected with the air filter through the hose, runoff turbocharger are mostly use the axial air intake type and the air resistance is small. Inlet is generally made by aluminum alloy casting. It can reduce the air resistance. Certainly the inlet surface must be machined. The annular space formed by the gap between the compressor and compressor back cove is known as compressor diffuser. Compressor impeller is consist of blades, wheel hub, wheel disc and wheel cover. Compressor impeller made by aluminum alloy casting and use  nut  fixed on the rotor shaft. The volute collect the air from diffuser pipe and lead air to the compressor outlet.

The turbine is a device that change exhaust energy into mechanical energy. Radial turbine are made from the vortex shell, turbine and the airway. Gas turbine blade and disk are cast into integration by precision method. The shape of the blade generally use a parabolic or general two times curve. Turbine work under the impact of  high temperature,high speed and corrosive gas. So its material must be in high strength, high temperature resistance and corrosion resistance.

How To Use Turbocharger Safely

1.Ensure the connecting clamps between turbocharger, pipes and other connecting bolt are not loosen and eliminate the leakage phenomenon. Check whether the return pipe and inlet pipe are not bending, flattening, oil spills. Joints connecting bolts could be no loose. While turbocharger housing is not overheating color and there is no crack.

2.Piping from the air filter to the turbocharger compressor inlet must be intact.

3.Check the oil quality and twisting the oil by hand. Then observed whether there is any mechanical impurity and viscosity changes and check the amount of oil.

4.Turn the crankshaft several times and do pre lubrication before starting.  Idle for about three to five minutes after starting until the water temperature and oil temperature are all normal. Then speed loading.

5.Diesel engine can not running at idle condition for a long time. Monitor turbocharger condition in operation, you should excluded the problem if the turbocharger noise or vibration is abnormal.

6.Control the intake air temperature strictly while pay attention to the out air temperature. Certainly you also should note the exhaust color. When the power of the diesel engine suddenly dropped and also with the exhaust pipe of black smoke, you should stop to checking immediately.

7.Diesel engine reduce the throttle gradually and idle for three to five minutes before stop.

Common Faults Of Turbocharger

Generally, turbocharger has four kinds of faults. They are oil leakage, compressor surge, excessive noise and overheated.

The reason of leakage are various. Such as the oil is not clean, the solid particle polluted seriously, poor quality or low grade oil, oil supply shortage or low oil pressure, the oil inlet pressure is too high, the air filter is clogged and others. If you have met this problem, you should check your engine speed. If the engine idling time is too long, you should improve the speed. If the import hydraulic booster is too high or too low, you should check the oil level. Add or replace the  eligible oil if it is necessary. If the oil pressure display normal, you should check the oil return channel turbocharger is smooth. Clean air filter, then dredge and clean diesel engine crankcase ventilation device.

The reason of excessive noise is also various. The leak noise because of the connection or the seal is not good. If there is foreign body entered, it may cause damage to the turbine or compress or impeller blade. Movement change of gas will make the supercharger vibration strongly. If you have met this problem, you should check the air filter without obstruction, whether foreign body have entered to the compressor inlet pipe or compressor casing, exhaust system of diesel engine. Diesel engine intake or exhaust pipe is loose and clean up or fastening.