Germany Wheelabrator seals Wheelabrator model Wheelabrator price

Wheelabrator seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation. These faces remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, along with the assistance of auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are sometimes used as auxiliary seals; however, since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mechanical seals".

Wheelabrator seal principle

An oil film controlled by the lip of the oil seal exists between the oil seal and the shaft, and this oil film possesses fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes it to form a meniscus at the interface with air, preventing the leakage of the working medium and thereby achieving sealing of the rotating shaft. The sealing capability of an oil seal depends on the thickness of the oil film on the sealing surface. If the thickness is excessive, the oil seal will leak; if it is too small, dry friction may occur, causing wear on the oil seal and shaft. If there is no oil film between the sealing lip and the shaft, overheating and wear are likely to occur. Therefore, during installation, some oil must be applied to the sealing ring, and it must be ensured that the skeleton oil seal is perpendicular to the shaft axis. If not perpendicular, the sealing lip of the oil seal will wipe the lubricating oil off the shaft, leading to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant to seep out from within the housing to maintain the formation of an oil film at the sealing surface.

Wheelabrator seal applications

Skeleton oil seals are widely used in industries such as aviation, automotive, motorcycles, railways, vehicles, ships, home appliances, and construction machinery. They are suitable for sealing rotating and reciprocating motions. They are installed on various heavy-duty engines, gearboxes, axles, ships, cylinders, and other components. Their primary function is to prevent the permeation of sealed media (gas, liquid) and the ingress of external foreign matter into the body. Precautions: The pressure-bearing range of standard oil seals is very limited, generally 0.03 MPa. This pressure is typically generated by the height difference of the lubricating oil itself. If higher pressures need to be sealed, high-pressure oil seals (generally capable of withstanding up to 1 MPa pressure) or other sealing forms should be selected.

Wheelabrator seal failure causes

Failures in mechanical seals are generally identified only after phenomena such as abnormal leakage, abnormal wear, or abnormal torque occur. The causes of failure can be broadly categorized into the following four aspects: 1) Incorrect design or selection of the mechanical seal; 2) Poor quality of the mechanical seal; 3) The precision of the machine using or installing the mechanical seal does not meet requirements; 4) Incorrect operation of the machine.

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