Cylinder liner, a hollow cylindrical shell, acts as the enclosure within which combustion happens. Manufacturers of cylinder liner India are making these products robust and providing them enough strength to withstand the high level of hoop stress.
The market of cylinder liners and auto parts in India is seeking more growth. More manufacturing companies are designing efficient auto parts and components for modern cars to meet the standards and specifications. OEMs shops in India are limited and they are exporting their products to worldwide clients.
Little acknowledgement about cylinder liner:
Manufacturers use CI material to fabricate cylinder liner due to its lubricating properties. Cylinder liner has good strength and anti-corrosion property. It offers a good surface for the piston and allows them to slide along its length. Cast iron material is porous in nature that prevents and minimizes the risk of seizure of the piston when the cylinder liner is at operating mode.
However, the cast iron material is not strong enough and thus, manufacturers mix small quantity of elements like copper, chromium, or nickel. Manufacturing of small liners is done by centrifugal casting, where as sand casting method is used for larger liners. The inner cylinder liner surface is usually chrome plated. But it doesn’t allow oil to spread out effectively and so, lubrication is done in bad manner.
You should know that a cylinder liner having cylindrical shape is a removable part. It is made from close grained cast iron. In four stroke cycle engines, they are flanged at the top end to offer space and secure them within the cylinder blocks or to the water jacket.
Below the flange, there is a joint ring made of copper or in a heat resistant rubber. The lower end has rubber rings that seal the area. These rubber rings are used for preventing oil leakage from the crankcase to water jackets.
The cast iron has a self lubrication property due to the presence of graphite content. You can still adjust the oil supply through the individual lubrication pumps placed at the engine front at the control level. Excess oil will get removed from the liner through piston oil scraper rings, and deposited in the scavenge air space.
Manufacturers of cylinder liners and other auto parts are seeking more business opportunities outside the country. Cylinder liner India market has leading suppliers that are offering their comprehensive range at competitive rates. You can search them online and get more details.
Machines and parts do wear when you use them continuously. Cylinder sleeves manufacturers bring various reasons to explain why wear and tear of the machine and parts take place and how can one prevent it. There are some maintenance and routine checks important to ensure that the machines work for more hours. This article explains all the things that you should know. Read it to explore the reasons behind degradation of your machine.
There are generally four reasons that cause wear in machines and the components:
- Adhesion or scuffing
Damage due to friction
Whenever two surfaces slide over each other, friction happens that leads to wearing of these surfaces. Liner sleeves surfaces are worn out due to friction between the piston rings and cylinder liner. The frictional wear relies on several factors like movement speed between the surfaces, temperature, pressure, maintenance, material involved, lubrication, and combustion efficiency.
Damage due to corrosion
Machines are made of metals and metals do corrode. The wear happens due to corrosion is caused by the burning of heavy fuel oil inside the combustion space. The heavy oil used by the machine has high sulphur content. During combustion process, acids are developed within the space which should be neutralized by cylinder oil as it is alkaline in nature.
Corrosion due to sulphur will be high because moisture is present in the fuel, which condensate in the air. The wear happens near the quills and provides a characteristic of the clover leaf shape to the wear pattern. This is known as clover leafing.
Damage caused by abrasion
When hard particles are present and form during combustion process, abrasion occurs. The ash and the catalytic fines in the fuel formed during the combustion result in abrasion and cause wear.
Damage caused by Scuffing or adhesion
This is a type of local welding between the piston rings and the liner surface. When the piston moves inside the liner, welding breaks and leads to the formation of abrasive material.
What can be done to avoid wearing of liner sleeves?
Cylinder can be protected against wear and tear by avoiding any ingress of water within the liner. You can treat the fuel oil and prevent moisture incoming. Maintaining the correct feed rate and cylinder oil grade will also help.
For any doubts or assistance, contact cylinder sleeves manufacturers of your town.
Steel may seem like an unsuitable material to cylinder sleeves manufacturers for making cylinder liners. The density of the steel is almost three times of aluminium. The thermal expansion of the steel is much lower than the aluminium piston that runs inside it, and it also has low thermal conductivity.
Still there are manufacturers that use the steel for making liners and you can expect the lowest total engine mass, despite its density. The major benefit of using steel for constructing cylinder sleeves is its strength and stiffness.
Cylinder liners made of aluminium are popular products as they conduct heat well. As compared to steels, the allowable stresses in aluminium are low, which increases the thickness of material to maintain stress within allowable limits. This implies the water jacket and the material surrounding it are bigger.
Problems with Aluminium :
The usual effects are that the engine block is heavier, and the crankshaft is heavier and longer. Another one is that the cylinder head fasteners are forced by the combustion chamber, which increases bending stresses. Even if the aluminium cylinder liners are usually lighter when compared to their steel counterparts, the new design of engine with aluminium liners is heavier.
Aluminium based liners can also get damaged by cavitation, hence manufacturers put coating on the exterior of the liner surface to make it more resistant to cavitation. However, when it is steel liners, cavitation doesn’t happen, still the products need surface treatment to prevent excessive corrosion.
The thermal conductivity is not so bad as well. Steel cylinder liner can be thinner as compared to aluminium to match fatigue stresses or displacement. This implies that the rate of heat transfer can be high for steel component as for an aluminium one.
There is nothing to tell about the steel strength that can help offset the fact that the thermal expansion coefficient is lower than the aluminium. Manufacturers need to understand that they should use larger cold clearance between the piston and liner to match the thermal expansion coefficient of aluminium.
Though the steel is not designed for use as a cylinder liner material, still manufacturers apply it for cylinder liners. The material is not widely available, nor is it easy to source in suitable liners sizes.
For more details on cylinder sleeves and liners, you can write a mail to Cylinder Sleeves Manufacturers, Liner Sleeves. They are best suppliers and exporters of liners and sleeves products throughout the globe.
Many Indian manufacturers produce divergent cast iron Cylinder Sleeves to resilience as little as one portion of one thousandth of an inch, on current CNC gear. Their centreless OD granulating process ensures a section that is splendidly round and to correct size determinations. The material utilized as a part of cylinder liners offers a Brinell hardness of 241-293, and machines effectively with quality and sturdiness like that of flexible iron cast.
Sleeves stocks sleeves for an extensive variety of the most prominent car applications, and also sleeves for compressors, agrarian applications, and oil field gear. Cylinder Sleeves offers liners with a wide scope of bore distances across, beginning as little as 2" up to a vast 8.50" bore, and complete lengths going from 1/8" up to 24". Sleeves are accessible in 3/32" and 1/8" divider for bore distances across up to 5-1/8". Bore distances across bigger than 5-1/8" are supplied just with 1/8" divider thickness. Cylinder Sleeves likewise offers 1/16" and 2mm divider thicknesses for perfect applications.
Fit and Finish Of a Cylinder Sleeve
One thing is very important when we talk about cylinder a sleeve that is the fit and the finish as the thermal efficiency and temperature varies a great deal. Since the temperature and pressure may vary therefore it is important that the fit of the cylinder sleeve does not shift from one place from other while in operation.
Cylinder sleeves are mostly made of either aluminium or cast iron. The ductile iron is moulded into the cast. When the engine is operating then the sleeve passes on the heat from the cylinder to the cast iron. Once it is done, then the coolant passes on which is present in the cylinder in order to remove the heat from the sleeve.
This is true for iron, but when it comes to aluminium it does not work exactly like this. As the expansion rate of aluminium is different from the iron. The interference fit in case of aluminium should be .003 inches to .004 inches.
At the point when a sleeve is introduced into aluminium chamber square then is the process start. In an aluminium piece, warmth might be expelled from the aluminium chamber square however not legitimately exchanged from the cast iron sleeve into the aluminium bore. The sleeved barrel can overheat, causing harm to the cylinder and rings due to the poor warmth dissemination between the distinctive combinations.
There are many Cylinder Sleeves Manufacturers in India who are not only catering to the domestic demand but also international demand. Because of increasing demand from the internal market therefore, they have been a number of exporters of Cylinder Sleeves. They have been receiving applauds from all the over the world, therefore there has been an increasing demand for industries in which Cylinder Sleeves are being manufactured.
High performance plastics are favorite materials used by auto parts exporters India in automotive industry these days. These plastics help in manufacturing more fuel efficient automotives. It is evaluated that every 10% reduction in the weight of the vehicle results in a 5% to 7% reduction in fuel use. Due to current environmental and economical concerns, manufacturers need to make more fuel efficient cars for consumers. This is why they mostly rely on high performance plastics that have other advantages also-
- Longer Life
- Minimal Corrosion
- Substantial Design Freedom
- Safety, Comfort, Economy
Some high performance plastics used by professionals for automotive products are as under-
It is a thermoplastic polymer used in vivid applications. It is a saturated addition polymer derived from the monomer propylene. Polypropylene is rugged and resistant to several chemical solutions, acids, and bases.
Solid Polyurethane is an elastomeric material having superior physical properties including flexibility, toughness, and resistance to temperature and abrasion. PUR has vast range of hardness to offer. It also has high flex life, weather resistance, oil resistance, radiation proof, gasoline resistance, etc.
PVC or poly vinyl chloride has great flexibility and thermal stability. It is flame retardant, and has a high gloss and low lead content. PVC compounds can be extruded, injection molded, calendered, blow molded and compression molded to create a vast range of profiles. These profiles can be hard or flexible, depending on the amount and type of plasticizers used by manufacturing team.
Nylon 6/6 is a common one that can be extruded and molded. It has great mechanical properties and wear resistance feature. It is used when an inexpensive, rigid, high mechanical strength and stable material is needed. Nylon is extremely water absorbent and will swell in watery environments.
It has high impact resistant, low density, and great toughness. Manufacturers used this plastic in various thermoplastics processing methods for moisture resistance and inexpensive production.
POM or Polyoxymethylene:
POM has superb stiffness, yield strength, and rigidity. The material is also resistant to fuel and is highly chemical. It can be used for interior and exterior trims making, small gears, and fuel systems.
There are a lot more plastics used by Auto Parts Exporters India. You can get supreme finish products at good price from them with an ease.
Different kinds of piston pins are used for completing the connection between a piston and rod. Some of them are full floating in both a piston and connecting rod; some are journalled in piston bosses.
In recent years, manufacturing units have made attempts of using a ceramic piston pin instead of steel made pin in order to decrease the friction losses, weight, and other cons of the engine. They discover an issue while trying this job and it was excess of wear in snap rings when they came contact with the ceramic piston pin. This further affects the unit and damages the cylinder liner.
Engineers may solve this issue by using the piston pin of which end surfaces in contact with the smooth finished snap rings. This is a costly affair and many engineers look for alternative ways to solve this issue. They prepare snap rings with costly metal that offers excellent wear resistance. It is still costly, but this method seems more effective and durable in nature.
About mechanism of lubrication
A lubrication mechanism includes-
1. Internal combustion engine
- A piston that is equipped with piston boss formed with a bearing surface
- A piston pin journalled
- A groove cut
2. Piston includes a scraper ring groove for retrieving in a scraper ring
3. Oil inlet hole contains an inlet end located at an ICP of piston. *ICP- inner circumferential periphery.
4. Second inlet hole is arranged in a way it makes 90 degrees angle
5. A lot more stuff that you can explore online.
Contact liner sleeves manufacturers to learn about this mechanism. Get professional tips and guidelines if you want to perform lubrication for your piston pins. It is suggested to include at least one professional when you perform this task.
Diesel Engine Parts Manufacturing Unit Advice To Keep Engines Away From Water?
Nothing can harm more the engine when it comes to water. Water is the greatest enemy of all for diesel engines. The presence of water causes corrosion and rust formation on system components and infrastructure. Modern variety of fuel systems are pretty less tolerant than lower pressure systems, that diesel engine parts manufacturers now specify zero free water must reach the engine.
Water damages to fuel tanks and engine parts. It builds up a hard layer of rust and corrosion in the tank that further results in engine wear. The life of the engine parts get shortened by water etching, cavitation, erosion, and spalling. Learn about the same more in detail-
- Rust- When water comes in contact with iron and steel surfaces, it produces iron oxide, which forms rust. Rust particles that get inside the fuel cause abrasive wear to parts. Premature wear may cause sudden breakdown of the engine parts.
- Corrosion- it is the most ordinary reason of injector problems. Water combines with acids present in the engine fuel to corrode both non-ferrous and ferrous metals.
- Abrasion – In terms of viscosity, water is below the diesel and thus, it offers less of a lubricating “cushion” between the opposing surfaces of automotive parts. This results in increased abrasive wear.
- Etching – It is caused by water-induced fuel degradation that develops hydrogen sulfide and sulfuric acid that demolish metal surfaces.
- Cavitation and pitting – Pitting occurs when free water flashes on hot metal surfaces. Cavitation happens when vapor bubbles rapidly imploding when exposed to sudden high pressure, which leads to condense back into a liquid. These water droplets impact a small area with huge force and leave it eroded and fatigue.
- Ice- Do you know? Free water present in the diesel fuel can form ice crystals that can behave like any other hard particles. They can create wear in engine fuel systems and clog filters.
These are the direct damages caused by water to diesel engine. Reputed Diesel engine parts manufacturers have just shared a list of issues that can breakdown diesel engine and all these issues are born by presence of water in the engine fuel system.