Skeleton oil seal installation methods and precautions

1. Installation method of skeleton oil seal seal in the shell hole

When assembling the skeleton oil seal seal, check the inner wall for debris, scratches, dust, casting sand, etc. Special tooling should be used to push the skeleton oil seal seal smoothly into the housing seat hole.

2. Installation of skeleton oil seal seal on the shaft

The inner diameter of the skeleton oil seal is usually smaller than the shaft diameter, forming a certain amount of interference, which can easily cause lip damage when assembling the skeleton oil seal. To prevent damage, a conical shoulder or conical tooling is generally used to assemble the skeleton oil seal seal.

When there are threads, grooves, and splines on the shaft, it is ineffective to use a conical shoulder to assemble the skeleton oil seal. Instead, special assembly tools need to be used to protect the lip of the skeleton oil seal, that is, when the threads, grooves, and splines are installed, Wear a protective sleeve to prevent the lip of the skeleton oil seal from being damaged by sharp corners, threads, grooves, splines, etc. on the shaft.

3. Installation procedures for skeleton oil seals and precautions during assembly

a. The skeleton oil seal seal must be kept clean from receipt to assembly. Do not tear off the wrapping paper too early before installing the skeleton oil seal seal to prevent debris from adhering to the surface of the skeleton oil seal seal and being brought into work.

b. Before assembling the skeleton oil seal seal, complete the machining inspection procedures to ensure that the dimensions of each part of the skeleton oil seal seal are consistent with the dimensions of the shaft and cavity. The end surfaces of the shaft and cavity must be smooth and clean, the chamfers must be free of damage and burrs, and the assembly parts must be clean. Shaft and seat holes should be machined with assembly chamfers of 15°-30°, especially inner chamfers, without slope. It is recommended that the assembly parts of skeleton oil seals adopt rounded chamfers. There should be no burrs, sand, iron filings and other debris in the shaft installation part (chamfering) to prevent accidental damage to the lip of the skeleton oil seal. The internal dimensions of the cavity must be suitable for the outer diameter and width of the skeleton oil seal seal.

c. Check whether the lip of the frame oil seal is complete, check whether the lip of the frame oil seal is damaged or deformed, and whether the spring of the frame oil seal has fallen off or rusted, so as to prevent the frame oil seal from being subjected to external force during transportation Impacts such as extrusion and impact will destroy its true roundness.

d. If the skeleton oil seal seal has an oil return line, the relationship between the installation direction and the rotation direction of the skeleton oil seal seal must be determined first.

e. When the skeleton oil seal is assembled, a proper amount of cleaning ointment such as lithium ester added with molybdenum disulfide should be applied between the lips of the skeleton oil seal to prevent the shaft from causing damage to the lip of the skeleton oil seal when the shaft is started instantly. Dry grinding phenomenon affects the interference of the lip of the skeleton oil seal seal. There should be no machined thread marks on the surface of the lip contact part of the skeleton oil seal seal. Apply sealant to the outer ring of the frame oil seal during assembly, and wrap the keyway or steps on the shaft with hard paper to avoid scratching or rolling over the lip of the frame oil seal, or use special tools such as guide transition sleeves to The frame oil seal is rotated and pressed inward, and it must not be hit hard to prevent the skeleton of the frame oil seal from being deformed or the spring of the frame oil seal from being broken and failing. If the lip of the skeleton oil seal seal is flanged, the spring falls off, and the skeleton oil seal seal is skewed, the skeleton oil seal seal must be removed and reinstalled.

f. Correctly use special installation tools to protect the lip of the skeleton oil seal from damage, even slight scratches are not allowed, otherwise it will easily cause leakage of the skeleton oil seal. It is recommended to use hydraulic equipment or socket tools for installation, the pressure should not be too large, and the speed should be uniform.

g. When the frame oil seal is installed into the housing, it should be carried out with uniform pressure and not tilted to avoid deformation of the outer circle of the frame oil seal.

h. Pay attention to the installation direction when assembling the skeleton oil seal. When internal sealing is required, the side of the skeleton oil seal seal equipped with the self-tightening spring (that is, the side with the groove) faces the inside of the box, and the dust lip faces outward.