Research and issues on bearing and seal failure
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Research on bearing failure: Reliability figures show that 50% of bearings fail. A large oil refinery conducted a study on equipment reliability and released statistical data on the causes of equipment failures. They concluded that, among the causes of failure in all rotating equipment (pumps, fans, reducers, etc.), bearing failure accounts for 40%. They further estimated the causes of bearing failure, with particulate contaminants accounting for 48% and corrosion accounting for 4% (caused by liquids in the oil). Therefore, 40% of the causes of 52% of the pollutants are due to bearing failure). Therefore, 40% of the causes of 52% of the pollutants are due to bearing failure; it can thus be concluded that 20.8% of all failures in rotating equipment are caused by bearing oil contamination. Research on seal failure: For example, rotary shaft lip seals belong to the category of contact-type dynamic seals, and their main working principle involves using flexible materials to block the flow of fluid and thereby prevent leakage. However, the surfaces that are sealed by a dynamic seal are in relative motion; if the blockage is too severe, it will exert pressure on the contacting surfaces, resulting in excessive wear resistance that hinders this relative motion. It also causes wear to the sealing element, thereby reducing the service life of the dynamic seal. To ensure a tight fit between the sealing lip and the rotating shaft, the lip of the rotary shaft lip seal must have a certain degree of interference when it is designed and manufactured. Generally, the greater the interference at the lip, the tighter the fit between the sealing lip and the rotating shaft, and the higher the contact stress generated; this in turn leads to more severe wear of the sealing lip. During the actual operation of the lip seal around the rotating shaft, due to machining errors and assembly errors, it is not possible to simply use the amount of interference at the lip edge to determine the deformation of the dynamic seal lip. Especially in applications where dust protection is required, the lip seals for rotating shafts usually feature a secondary lip. Since the interference amount at the secondary lip is smaller than that at the main lip, if the tolerances of the rotating shaft are not properly designed, it is common for the surface of the secondary lip to not make tight contact with the rotating shaft. This causes leaks to occur in mechanical equipment during operation. The current effective solution is in my topic.
Regarding bearing failures, the main cause is particulate contaminants, accounting for 20.8% of all failures. Solutions may include improving the quality of the lubricating oil, adding filters, or enhancing the sealing performance of the bearings. In the case of sealing failure, especially with lip dynamic seals, the problem often lies in an improper design of the interference amount, which results in poor sealing or rapid wear. Improvement measures include precisely controlling machining and assembly errors, as well as designing a proper secondary lip structure to prevent leakage. .
Your explanation is correct; according to the response, your product should have a labyrinthine structure. Regarding the issue of particle contamination leading to leaks, we have a design feature that ensures no leaks occur. The measures we talk about, such as adding filters and improving lubricants, not only increase costs but also fail to address the root of the problem.
Skeletal oil seals that have been used in the past: 1. When sealing, traditional skeletal oil seals tend to cause wear on the shaft surface; therefore, manufacturers include a shaft sleeve as part of the design to facilitate replacement later on. 2. Traditional skeleton oil seals have a short sealing lifespan, requiring the replacement of the oil seal and shaft sleeve every three months on average. 3. There are a wide variety of traditional skeleton oil seals, and their applicability is limited by specific operating conditions. When equipping oil seals, manufacturers usually need to provide a wide range of products. 4. Traditional skeleton oil seals have a short service life and require frequent component replacements. Replacing this oil seal is costly. (I’ve suffered heavy losses due to these in the past.) What’s being used now are Huali seals – magnetic oil seals (which meet all the required standards). 1. The OM oil seals feature a dynamic and static ring design; the dynamic ring fits tightly with the shaft surface, while the static ring seat fits tightly with the chamber, thus eliminating the need to incur additional costs for shaft sleeves. 2. When installing the oil seal, there is no need to change the position of the existing oil seal; it does not wear the shaft, thereby reducing power consumption. 3. Utilize the magnetic attraction of magnets to keep the stationary and rotating rings in constant contact; a composite material is added between them as a friction pair to achieve zero leakage. 4. It has a low friction coefficient, resulting in very low heat generation. 5. The magnetic compensation system uses permanent magnet materials to ensure even stress distribution on the sealing surface, thereby eliminating fatigue effects. 6. The designed service life can exceed 25,000 hours.
Thank you for the recognition. If you have any other questions or need further assistance, please let me know at any time. .
Mm-hmm, you’re also very professional and have room for growth; let’s see if there are any opportunities for collaboration. double