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Oil seal oil leakage and countermeasures
Oct 19,2023
Oil seal is an important part of all kinds of agricultural machinery and equipment, which is widely used. Tractors, agricultural transport vehicles, rice and wheat combine harvesters and other agricultural machinery are equipped with a variety of oil seals, which can effectively prevent the leakage of lubricating oil and hydraulic oil, and prevent dust and dirt from entering the machine. The performance and quality of oil seal directly affect the reliability of various agricultural machinery and equipment. Some oil seals have a long life of one year, as few as a few months, or even three or five days, due to lax sealing and resulting in oil leakage and scrap, which seriously affects the efficiency of various agricultural machinery and equipment, not only increasing fuel consumption and production costs, but also polluting the environment. The causes and solutions of oil seal damage and oil leakage in the use of agricultural machinery are:
The main factors causing oil leakage of agricultural machinery oil seal
1. For new or overhauled agricultural machinery, running-in operation and maintenance after running-in are not carried out in strict accordance with technical specifications, so that the metal chips ground down inside the machine enter the oil seal, resulting in abrasive wear, resulting in early damage to the oil seal.
2. Do not pay attention to cleaning when installing the oil seal, so that impurities and dust enter the oil seal, causing accidental wear of the shaft seal.
3, when installing, the machine knows that there are obvious scratches and burrs on the shaft, still loaded into the machine, so that the oil seal is strained; Or the tightness of the oil and the shaft is not enough, resulting in oil seal oil leakage.
4, the quality of the oil seal is poor, and even the obviously incomplete, aging, cracked oil seal is installed on the machine, resulting in oil seal oil leakage.
5, improper operation during assembly, so that the oil seal distortion, and even the oil seal self-tightening spring loss caused by oil leakage.
6. The elasticity of the self-tightening spring of the oil seal is not enough, so that the tightness of the oil seal is poor, resulting in oil leakage.
7, agricultural machinery often overspeed, so that the installation of the oil seal rotating shaft working speed exceeds the oil seal adaptation speed, resulting in oil seal oil leakage.
8. The oil seal is installed incorrectly on the shaft, such as the skeleton self-tightening oil seal on the drive shaft of a small tractor and the skeleton rubber oil seal are installed in the opposite position, or the opening of the skeleton self-tightening oil seal is installed in the opposite direction, resulting in oil leakage. If the oil seal is installed incorrectly on the shaft, the center line of the oil seal does not coincide with the center line of the shaft, resulting in oil leakage.
Solutions to agricultural machinery oil seal oil leakage
1, master and identify the basic knowledge of shoddy products, choose high quality, standard oil seal.
2, before installation, if the external surface of the journal is rough or has rust, rust, burr and other defects, it should be polished smooth with fine abrasive cloth or oil stone; Apply cleaning oil or lubricating grease to the lip of the oil seal or the corresponding position of the journal. The outer ring of the oil seal is coated with sealant, and the key seat on the shaft is wrapped with stiff paper to avoid scratching the oil seal. The lip uses special tools to rotate the oil seal into the inside, do not smash hard, to prevent the oil seal deformation or break the spring and failure; If there is lip flanging, spring off and oil seal skew, it must be removed and re-installed. It should be noted that when the journal is not worn and the oil seal spring is sufficiently elastic, do not tighten the inner spring without authorization.
3, the oil seal applied to the machinery is generally poor working conditions, the environmental temperature difference is large, the dust is much, the machine vibration is frequent, so that the mechanical conditions are constantly changing. Therefore, it is necessary to check, maintain and maintain frequently.
4, such as the journal and bearing wear serious, oil seal rubber aging or spring failure, should be timely repair and replace the corresponding parts.
5, for the abnormal heating parts, the fault should be removed in time to avoid mechanical overspeed and overload operation, to prevent the oil seal lip temperature rise, rubber aging, early wear of the lip.
6, to often check the oil level and quality of the oil, if the oil level is too low or too many impurities, there are alloy powder, metal iron filings, to completely replace the new oil, the oil brand and quality to meet the requirements of the season.
7, temporarily unused oil seals should be properly kept to prevent exposure to oil, dust or sun exposure.
8. When the journal is worn into a "V" shape groove, the contact pressure between the new oil seal lip and the shaft drops, and the oil seal cannot be sealed, AR-5 two-component adhesive can be used to patch, which is simple, reliable and wear-resistant, and the oil seal can also be replaced by displacement method.
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