diesel engine parts

diesel engine parts

Negotiable /Piece

Min.Order:100 Pieces

Supply Ability:
10000 Piece / Pieces per Month
Port:
Shanghai
Payment Terms:
D/P D/A Credit Card

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Place of Origin:
Jiangsu, China
Brand Name:
zhanshuo
Model Number:
K03 water cooling

Changzhou Zhanshuo Machinery Co., Ltd.

Business Type: Manufacturer
Changzhou Jiangsu China
Main Products: K03 ,TD04 ,K16 ,GT35

Product Details

Specifications

turbocharger spare parts
1.Model:K03 water cooling
2.fuel efficiency
3.Competitive price
4.Environmental protection

Bearing system

 

diesel engine partsTurbocharger bearing system

 

The turbocharger shaft and turbine wheel assembly rotates at speeds up to 300,000 rpm. Turbocharger life should correspond to that of the engine, which could be 1,000,000 km for a commercial vehicle. Only sleeve bearings specially designed for turbochargers can meet these high requirements at a reasonable cost.

 

Radial bearing system

 

With a sleeve bearing, the shaft turns without friction on an oil film in the sleeve bearing bushing. For the turbocharger, the oil supply comes from the engine oil circuit. The bearing system is designed such that brass floating bushings, rotating at about half shaft speed, are situated between the stationary centre housing and the rotating shaft. This allows these high speed bearings to be adapted such that there is no metal contact between shaft and bearings at any of the operating points. Besides the lubricating function, the oil film in the bearing clearances also has a damping function, which contributes to the stability of the shaft and turbine wheel assembly. The hydrodynamic load-carrying capacity and the bearing damping characteristics are optimised by the clearances. The lubricating oil thickness for the inner clearances is therefore selected with respect to the bearing strength, whereas the outer clearances are designed with regard to the bearing damping. The bearing clearances are only a few hundredths of a millimetre.

 

The one-piece bearing system is a special form of a sleeve bearing system. The shaft turns within a stationary bushing, which is oil scavenged from the outside. The outer bearing clearance can be designed specifically for the bearing damping, as no rotation takes place.

 

Axial-thrust bearing system

 

Neither the fully floating bushing bearings nor the single-piece fixed floating bushing bearing system support forces in axial direction. As the gas forces acting on the compressor and turbine wheels in axial direction are of differing strengths, the shaft and turbine wheel assembly is displaced in an axial direction. The axial bearing, a sliding surface bearing with tapered lands, absorbs these forces. Two small discs fixed on the shaft serve as contact surfaces. The axial bearing is fixed in the centre housing. An oil-deflecting plate prevents the oil from entering the shaft sealing area.

 

Oil drain

 

The lubricating oil flows into the turbocharger at a pressure of approximately 4 bar. As the oil drains off at low pressure, the oil drain pipe diameter must be much larger than the oil inlet pipe. The oil flow through the bearing should, whenever possible, be vertical from top to bottom. The oil drain pipe should be returned into the crankcase above the engine oil level. Any obstruction in the oil drain pipe will result in back pressure in the bearing system. The oil then passes through the sealing rings into the compressor and the turbine.

 

Sealing

 

The centre housing must be sealed against the hot turbine exhaust gas and against oil loss from the centre housing. A piston ring is installed in a groove on the rotor shaft on both the turbine and compressor side. These rings do not rotate, but are firmly clamped in the centre housing. This contactless type of sealing, a form of labyrinth seal, makes oil leakage more difficult due to multiple flow reversals, and ensures that only small quantities of exhaust gas escape into the crankcase.

 

diesel engine partsTurbocharger for passenger car gasoline applications with water-cooled bearing housing

 

Petrol engines, where the exhaust gas temperatures are 200 to 300 °C higher than in diesel engines, are generally equipped with water-cooled centre housings. During operation of the engine, the centre housing is integrated into the cooling circuit of the engine. After the engine's shutdown, the residual heat is carried away by means of a small cooling circuit, which is driven by a thermostatically controlled electric water pump.

 

We supply turbocharger parts with high quality and competitive price. Good quality, promptly service and competitive price, all win a good fame in turbo field for us. Our turbochargers are mainly used in trucks, generators, etc. Our main products include TB25, TB28, 4032, 4100, 4102, 4108, 4113, TB34, H1C, H1E, HX, K03, K27, K28, K29, GT17, GT35, GJ80, GJ90, TD04, TD05, CT26 and so on.

Our mission is "Provide Products with Reliable Quality and Reasonable Prices". We welcome customers from every corner of the world to contact us for future business relationships and achieving mutual success.

If you need more information please contact us , we are always here being ready to help you.

 

 

Contact Supplier

Ms. Annie Huang Chat Now
Telephone
86-519-68863572
Mobile
13775005288
Fax
86-519-88720805
Address
No. 379 hengyu road Henglin town Wujin district Changzhou,Jiangsu

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