04E103170A Auto Engine Systems Crankshaft Oil Seal

Crankshaft oil seal sealing principle :

Because there is an oil film controlled by the edge of the oil seal between the oil seal and the shaft, the oil film has fluid lubrication characteristics.Under the action of the liquid surface tension, the stiffness of the oil film just makes the contact end of the oil film and the air form a crescent surface, preventing the leakage of the working medium, so as to achieve the sealing of the rotating shaft;the sealing capacity of the oil seal depends on the thickness of the sealing surface oil film, the thickness is too large, the oil seal leakage;If the thickness is too small, dry friction may occur, causing oil seal and shaft wear;There is no oil film between the seal lip and the shaft, which is easy to cause heat and wear;therefore, in the installation, it is necessary to apply some oil on the sealing ring, while ensuring that the skeleton oil seal is vertical with the axis line, if not vertical, the sealing lip of the oil seal will drain the lubricating oil from the shaft, which will also lead to excessive wear of the sealing lip.During operation, the lubricant in the shell exudes a little to achieve the ideal state of forming an oil film at the sealing surface.

Functions of Automotive Seals

Seals are integral parts of the automotive industry. They are used in a variety of different applications. Seals may be small but they serve an even bigger and greater purpose in the integrity of the vehicle. Below are the functions of the seals in cars.

• They enclose the gas and liquid within the chamber. The gas tank contains seals that allow the vehicle to use up the fuel without wasting it. Hydraulic seals are also important for the movement of vehicle parts. Systems within the vehicle that uses hydraulic seals include suspensions and brakes.

• Stave off contaminants from crucial parts of the vehicle components. Seals keep away dust and other debris away from the engine and other important components of the vehicle.

• They keep liquids and gases separated from one another. There are many car parts that use liquids and gases to function properly. Examples include: the engine which keeps the coolant and engine oil, brakes for the brake fluid, and the reservoir to keep the power steering fluid to name a few.

• To protect bearings. Bearings are often filled with lubricants that protect the parts from corrosion, wear, and tear. The bearings need to be spotless, thus a contamination within it may cause the housing elements to experience premature failure. The seals protect the bearing by preventing dust and powder from entering the assembly.

Rational use of oil seal
1. the air filter must maintain a good technical state, otherwise the dust in the air into the cylinder, on the one hand, accelerate the wear of the cylinder and piston ring, on the other hand, with the lubricating oil along the cylinder wall into the oil pan pollution oil, causing the wear of the oil seal, resulting in oil leakage.
2. Clean and qualified lubricating oil should be used. If there are impurities in the oil, its entry into the lip will not only accelerate the wear of the lip and the journal, but also destroy the surface tension of the oil film, resulting in oil seal oil leakage. Some machines add a regenerative oil or mixed oil to the diesel engine, where the use of this oil diesel engine, crankshaft oil seal oil leakage is particularly serious. Because the viscosity of this oil is too low, it cannot form a sealing oil film.
3.the diesel engine is not allowed to overspeed or speed changes. All kinds of seals have a specified linear speed, such as the crankshaft shaft seal of the SI95 diesel engine, the linear speed of the journal should be less than 15 meters/second, more than this speed will make the temperature of the oil seal lip, accelerate the aging of rubber, accelerate the lip wear. The frequent change of speed will destroy the lubricating oil film at the lip border, make the lip directly contact with the journal, and accelerate the wear of the lip.

NNK Oil Seal

1、For the factory
We are an honest oil seal supplier.We have very good expertise, experienced technicians, new good equipment, strict inspection procedures, durability and performance seal testing, PPAP level IIl submission. Strict process control, international standard high-quality products and affordable prices. The strength factory has more than 150 workers, strong delivery capacity, we provide you with the best after-sales service.

2、For products
NNK is committed to the best raw materials, and uses advanced technology and equipment to solve oil seal problems for customers.Our products not only ensure the sealing effect, but also minimize the friction force. The service life is longer than the average service life of oil seals. less loss.

3、About production
A: Existing molds: 30 days, depending on ordering quantity.
New Molds: 60 days, depending on ordering quantity.
Samples Submission :21-28 days with existing toolings.
We are NNK brand under NOK-CN, accept ODM and OEM. We have the ability to provide samples of disassembled products, develop molds,and carry out production

FAQ

1.What is your packing?
a. Paper roller: 10pcs in one roller, 200 rollers in one carton b. PP bag: 50 or 100pcs in one bag,15 or 30 bags in one carton
C.Box:1pctoabox
d. According to customer's request. 

2.Date of Delivery 
a. 1-2 days if goods in stock.
b. 10-15 days if goods out of stock with molding. 
c.25-30 days if goods out of stock without molding. 

3.Payment Term:
a. 30% T/T in advance and 70% balance paid before shipment. 
b. West union/Money Gram 
C.Paypal
d.others for discussion

4.Can you produce according to the samples?
a. We accept ODM and OEM at the same time.We have the ability to provide the sample of the products of decomposition, develop the mould, for production. 

5. How do you make our business long-term and good relationship?
a. We will continue to improve the process control, and improve the quality of our products and work to reduce operating costs and provide a competitive price for customers, to ensure that customers benefit
b. We seriously treat every customer, in good faith with them to do business, make friends, no matter how much volume, we will provide