Hydraulic seals Seal advantage

Oil seal structure consists of three parts: the seal body, strengthen the skeleton and the self-tightening spiral springs. Seal according to different parts of the body is divided into the bottom of the waist

Section, and the sealing lip edge and so on. In general, oil seal a free state, an inner diameter smaller than the shaft, which has a certain "amount of interference."

Thus, when the oil seal into the seal seat and shaft seal edge pressure and self-tightening spiral spring contractile force of the shaft produce certain radial clamping force, after a period of time to run, the pressure will decrease rapidly and even disappear therefore, you can always add the spring force from the tight seal to compensate.

The role of oil seal of the transmission components in general is in need lubrication components and parts output isolation, and will not allow oil leakage, typically used for oil seal a rotatable shaft, a rotary shaft lip seal. Like the skeleton reinforced concrete structures inside, serve to strengthen the role and seal to maintain the shape and tension. Press skeleton type can be divided in the seal, the outer seal, the inner and outer exposed skeleton oil seal. Oil seal is made of high quality nitrile rubber and steel made, stable quality, long service life. Widely used in automobile, motorcycle crankshaft, camshaft, differentials, shock absorbers, engine, axle, front and rear wheels and other parts.

Rotary shaft lip seals generally called as an oil, widely used in engineering machinery transmission, drive bridges components, such as front and rear output shaft of the gearbox, main gear drive axle, wheel, etc., its function is to put oil cavity and the outside world, internal seal oil, foreign dust. At present domestic oil seal structure type uses a lot more, its basic structure comprises a rubber sealing parts, metal frame or metal housing and a metal spring.

The main features of the new rotary shaft lip seal is between the rotating shaft and the seal lip is designed in a wavy coated with a layer of rubber seal hub, at work, with the inner hub coaxially rotate together, and seal in its lip achieve dynamic seal between the inner portion and the outer surface of the hub. Its advantages are:

1. In the part of the hub seal coated with a layer of corrugated rubber, can adapt relatively large rotational axis eccentricity (usually requires only about 0.5mm) and axial deviation larger range of sizes, and have better axial radial cushioning. Such shaft seal in the eccentricity of 0.5mm, speed test at 800rpm muddy conditions shows good sealing performance; while 50000km life test also showed very long service life.

2. Since the seal is between the seal lip and inner hub to achieve, so the shaft roundness, surface roughness of less demanding on the shaft surface is not sensitive to minor injuries, improve the reliability of the seal.

3. coated with a layer of rubber inner hub, enabling seal securely mounted on the shaft, such as before installing rubber coated grease point, the installation becomes easier.

4. In the oil chamber between the outside world and designed a labyrinth channel, and arranged two dust lip in the channel, the main lip and the dirt and water to keep a distance, to extend the rotary shaft lip seal life.