Reasons for oil leakage in coal mining machine floating oil seals

Floating oil seal installation tilt

Under normal circumstances, the Ningxia DO1007 floating seal requires a very tight fit between the coal mining machine's floating oil seal lip and the shaft neck to effectively prevent oil leakage. However, according to the author's research and analysis, due to improper installation and carelessness, some coal mining machine floating oil seals may be installed at an angle, resulting in an inability to form a perpendicular fit between the lip and the shaft neck (connecting rod). In this situation, if the floating oil seal is activated, the lip will deform due to the reinforced frame traction, forming an elliptical shape. This then causes the elliptical lip of the floating oil seal to not fit perfectly with the circular shaft neck due to differing contact areas, leading to oil leakage in the coal mining machine's floating oil seal.

Analysis of the Abolition of Floating Oil Seals

1. Inappropriate float seal seat design

Because the floating oil seal must be combined with the floating seal seat to form a complete sealing system, the installation gap of the DO1007 floating seal and the rationality of the floating seal seat design directly affect the proper functioning of the floating oil seal. Refer to the design data provided by the floating oil seal manufacturer or relevant standards for the floating oil seal, and process according to specifications.

2、Inappropriate lubricant use

Improper lubricant use can lead to premature failure of floating oil seals. Choosing the wrong lubricant can cause rubber rings to corrode and age, losing their elasticity, especially when combined with heat, which accelerates this process. Inadequate lubrication and cooling can also result in the burning of the floating seal ring.

What are the causes of damage to floating oil seals?

1.High surface roughness, primarily due to extended use, medium erosion, and poor maintenance.

2.There are noticeable indentation marks, primarily caused by the use of overly hard shims or the presence of sand particles, slag, or other foreign matter.

3.Surface has scratches and gouges, DO1007 Floating Seal Company, mainly due to operation violations during disassembly and cleaning.Procedure, caused by improper force.

4.Severe rusting, primarily caused by medium corrosion and improper valve selection.

5.明显的 grooves, primarily the result of leakage from the static sealing surface not being repaired in time, due to medium erosion.

6.Deformation occurs primarily due to insufficient rigidity, excessive connection forces, and the result of thermal creep under high temperatures.

7.Leakage holes are primarily caused by poor manufacturing quality, leading to defects such as wrinkles, pores, and夹杂.

8.Cracks are primarily caused by poor design, low manufacturing quality, improper installation or operation, and long-term exposure to alternating loads.

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