APPLICATIONS

Open gear transmission is the most common method used in raw material processing in industries such as cement, steel, chemicals, power generation, and mining.

In these industries, open gears have unique characteristics compared to enclosed gears. They can transmit significant force and torque, have large dimensions, drive substantial power, and may have poor sealing conditions (exposed or incomplete sealing), making them susceptible to external working conditions like dust, water vapor, rainwater, and thermal radiation. Open gears endure immense loads and complex impact stresses. Additionally, due to their special size and structure, and the need for appropriate lubrication and lubricants to adapt to the complex friction between gear surfaces.

For the cement industry, open gears face even more complicated operating conditions. For instance, in rotary kilns with open gears, despite having good installation precision, problems such as deformation of the kiln body, wear of wheel belts, foundation sinking, wheel set displacement, internal kiln structure changes, deformation of the large ring gear itself, abnormal equipment vibration, and insufficient lubrication on gear surfaces may lead to various gear meshing problems. This can result in damages like surface abrasion, adhesion, plastic deformation, pitting, and peeling, ultimately shortening the gear’s lifespan. In the grinding system, open gears may experience premature failure due to excessive impact loads, transmission system vibrations, and severe dust environments.

As a result, the lubrication of open gears in cement plants requires heightened attention. Understanding their lubrication process should begin with the gear installation. For this purpose, BRUGAROLAS BESLUX CROWN, drawing from decades of experience, proposes the complete lubrication system for open gears (the four-step open gear lubrication approach): base coating – assisting gear alignment during installation; running-in – improving gear surface roughness, adjusting minor tooth surface deviations, and increasing gear contact area; normal lubrication stage – safeguarding gear safe operation; and repair – in-situ forced running-in and repair after accidental gear surface damage. During the normal lubrication stage, it is essential to select a suitable adhesive lubricant (high viscosity oil or fluid grease) based on factors like gear power, temperature, and environmental conditions. These lubricants must possess adequate extreme pressure performance (e.g., withstand four-ball welding loads of over 800kg) and ideally contain a certain proportion of solid additives to meet additional load-carrying demands and provide extra emergency protection.

Only by selecting appropriate lubrication steps, suitable lubricants, and lubrication methods based on the equipment’s actual operating conditions and conducting regular on-site inspections can the safe operation of gears be effectively protected. The products in this system have been recognized and recommended for use by equipment manufacturers like KHD (Humboldt Wedag), Polysius, Metso Outotec, F.L. SMIDTH, CITIC HMC, Northern Heavy Industries, and others world-leading brands.