The correct lubrication of hydrodynamic plain bearings is crucial for a long service life and optimum performance. But how do you find the right lubricant and what factors need to be taken into account?
In this blog article, we answer the most frequently asked questions about hydrodynamic plain bearing lubrication, from
Find out how to maintain your hydrodynamic plain bearings effectively and which tips can help you to operate your machines efficiently and reliably.
The performance and service life of a system often depends on the right bearing technology. Hydrodynamic plain bearings are an excellent choice as they minimize friction and wear by forming a lubricating film between the shaft and bearing body. A sufficient rotational speed and the right lubricant are essential for this. If hydrodynamic plain bearings are used in systems whose components need to be lubricated, hydrodynamic plain bearings can normally be supplied via the existing circulation lubrication system. A hydrostatic system can also be useful for certain applications and requirements. This uses a suitably powerful pump to lift the shaft using hydrostatic pressure and ensures the load-bearing capacity and oil supply.
Below we answer the most frequently asked questions about the lubrication of plain bearings.
The choice of the right lubricant depends heavily on the application. Mineral oils or synthetic oils are usually used because they offer good viscosity and stability. However, alternatives such as water or water glycol can also be used in certain environments.
It is important that the lubricant is designed for the corresponding temperature, load and speed. Only with the right medium can lubrication be optimized and the service life of your hydrodynamic plain bearing extended.
To select the right oil for the lubrication of hydrodynamic plain bearings, the operating conditions should be considered in more detail:
Our experts will be happy to help you select the right combination of oil and plain bearing.
This is a specialized method in which a water-glycol mixture is used as a lubricant in hydrodynamic plain bearings. The mixture offers high fire resistance and good thermal conductivity. Although Miba has not yet implemented a series application with water-glycol lubrication, we are continuously working on new solutions. Our expertise in the development and customization of hydrodynamic plain bearings allows us to flexibly meet the specific requirements of our customers.
In oil sump lubrication, the surrounding structure of the application acts as a reservoir for the lubricant—this is known as the oil sump. The hydrodynamic plain bearing or components connected to the bearing periodically dip into this oil sump, ensuring that the bearing is continuously supplied with oil.
The amount of lubricant required depends on the type of bearing and the specific application. A sufficiently large supply is crucial to ensure continuous lubrication and prevent overheating. At Miba, the exact amount is calculated during the detailed design of the bearing. This ensures that hydrodynamic plain bearings are optimally lubricated and operate reliably.
The lubricant must not cause harmful reactions with the materials in the bearing or the entire system. Therefore, lubricants and bearing materials must be perfectly matched. At Miba, we place great emphasis on ensuring that all components work together harmoniously to ensure optimal performance and long service life. If you have specific requirements or questions regarding compatibility, we are happy to assist you.
In high-performance applications or at high speeds, additional lubricant cooling may be necessary to maintain the operating temperature of the lubricant within the ideal range. Excessive temperatures can impair lubrication performance and shorten the lifespan of the hydrodynamic plain bearing. Targeted cooling ensures that the lubricant retains its optimal viscosity and operates efficiently. At Miba, the temperature development is taken into account as part of the detailed design and an appropriate solution is developed together with the customer.
A minimal supply pressure is usually sufficient to ensure lubricant delivery. If additional pumping systems are used, the typical pressure range is usually between 1 and 5 bar. This pressure range ensures that the lubricant circulates adequately, providing optimal lubrication.
How often the lubricant should be changed depends on the operating conditions and the type of lubricant. Typically, the oil should be regularly checked for contaminants. If necessary, it should be replaced to ensure the optimal performance and lifespan of your hydrodynamic plain bearing
Proper lubrication of hydrodynamic plain bearings ensures reliable and long-lasting operation. From the selection of the lubricant to regular maintenance, every step plays a crucial role. By carefully choosing the right lubricant and conducting regular inspections, you can ensure that your hydrodynamic plain bearings perform optimally.
Read more about our plain bearings on our product pages axial and radial plain bearings.
If you have any questions or specific requirements, we are happy to assist you in finding flexible solutions for your applications. Trust in our expertise!