The role of each part of the oil seal

The reinforcement inside the concrete member and allows the oil seal to maintain its shape and tension. Generally, the inner diameter of the skeleton oil seal in the free state is smaller than the axial diameter, that is, it has a certain 

Amount of "interference". Therefore, when the oil seal is loaded into the oil seal seat and shaft, the pressure of the oil seal edge and the contraction force of the self-tightening spiral spring produce a certain radial tightening force on the shaft. After a period of running, the pressure will rapidly decrease and even disappear. Therefore, the spring can compensate the self-tightening force of the oil seal at any time.

The outer edge of the oil seal not only fixes the oil seal in the cavity hole, but also prevents the fluid from leaking and invading from the contact surface between the outer surface of the oil seal and the cavity surface. In addition, when the oil seal is fixed in the cavity, the metal skeleton plays the role of maintaining the combining ability.

Sealing lip is a flexible elastomer, designed to maintain a stable sealing effect under the influence of mechanical vibration and sealing fluid pressure changes, and play a role in maintaining a stable contact between the lip and the shaft surface. The spring can improve the sealing lip axial compression force, to maintain the role of the compression force. The end of the lip is made into an oblique wedge shape, which acts as a seal against the surface of the shaft.

Dust-proof lip is not connected with the spring of the auxiliary lip, to prevent the invasion of dust.

Lip: The lip of the general oil seal is inclined wedge, which plays the role of sealing fluid by pressing the surface of the lip end.

Sealing lip is a flexible elastic body, usually under conditions, its inner diameter is smaller than the axial diameter, that is, it has a certain amount of interference, keep the lip and shaft surface stable contact state, under the influence of mechanical vibration and sealing fluid pressure changes can still maintain a stable sealing effect.

The spring is used to improve the seal lip axial compression force, and maintain the role of the compression force.

Dust lip is not connected with the spring lip, mainly to prevent dust from the outside invasion.

The fitting part makes the oil seal fixed in the cavity body, and maintains the combining force, while preventing fluid leakage or intrusion between the outer surface of the sealing ring and the inner surface of the cavity body.