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What is mechanical sealing? What is a skeleton oil seal? How many types of sealing pads are there? Mechanical seal is a device used to solve the seal between the rotating shaft and the body. It is a device that constitutes a relative sliding of the paste and the compressor leakage by the end surface that is perpendicular to the elasticity (or magnetic force) of the fluid pressure and compensation mechanism and the coordination of the auxiliary seal. Rotating fluid machines such as reaction mixing kettle are also used for gearboxes, valves, rotating joints, and ship tail shafts.
Skeleton oil seal is a typical representative of oil seal. Generally speaking, the oil seal under popular china oil seal design refers to the skeleton oil seal. The function of the oil seal is generally to isolate the parts that need to be lubricated in the transmission part from the contributing parts to prevent the leakage of lubricating oil. The skeleton is like a steel bar in a concrete member, acting as a reinforcement to keep the oil seal in shape and tension. According to the structure, lip frame oil seal and lip frame oil seal can be divided into single lip frame oil seal. The auxiliary lip of the lip frame oil seal acts as a dustproof function to prevent the outside world from entering the machine. According to the frame type, it can be divided into built-in frame oil seal, external frame oil seal and prefabricated oil seal. According to working conditions, it can be divided into rotary skeleton oil seal and reciprocating skeleton oil seal. Widely used in gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, bridges and other parts. There are two types of gaskets.
Static seal and dynamic seal. Comparison of traditional rotation sealing: Traditional rotation sealing mainly includes skeleton oil seal, maze seal, and traditional mechanical seal.
1) Skeleton oil seal. The short -term cost performance is high, but the comprehensive cost of long -term operation is high, the service life is short, the leakage rate is high, the line speed is low, the neck is worn, and the lubricating oil is easy to lose or pollution. Therefore, it is not appropriate to use it under continuous operation.
2) Mystery seal. Compared with the skeleton oil seal, the performance is better, and there is no contact; the sealing structure and the speed of the equipment line are more related to the viscosity of the medium; the axial oil leakage still exists, and it cannot be used for vertical sealing conditions. For long -term use, the amount of oil leakage is still large, and it is difficult to control environmental pollution and oil consumption.
3) Traditional mechanical sealing, tight structure, less leakage; long service life; less frictional power; shaft or shaft cover is basically not worn; Floating, safe and reliable, long operation cycle; wide range of applications. However, a high investment, time installation time, and high installation accuracy requirements; high accuracy requirements, complicated processing, and large installation size. Skeleton oil seal and mechanical sealing skeleton oil seal: Just like the reinforcement in the concrete component, it plays a enhanced role and enables the oil seal to maintain the shape and tension.
According to the structure, the lip skeleton oil seal and the lip skeleton oil seal can be divided into single lip skeleton. The auxiliary lips of the lip skeleton oil seal have a dustproof effect to prevent the outside of the outside world from entering the machine. According to the skeleton type, it can be divided into inner packaging skeleton oil seal, exposed skeleton oil seal and prefabricated oil seal. According to working conditions, it can be divided into rotating skeleton oil seal and round -trip skeleton oil seal.
Skeleton oil seal structure: There are three parts: oil seal, strengthening skeleton and self -tight springs. Generally, the inner diameter in the skeleton in a free state is smaller than the axis diameter, which has a certain “over -profile”. Therefore, when the oil is encapsulated into the oil seal and the axis, the pressure of the oil seal and the spiral springs of the oil seal blade has a certain radial tightening force on the shaft. After a period of operation, the pressure will be quickly reduced or even disappeared. As a result, the spring can be compensated at any time.
