What factors may cause a shortened maintenance cycle for RX91-4.85-7.5KW gearbox

The following factors may lead to a shortened maintenance cycle for the RX91-4.85-7.5KW gearbox:

Poor working environment

High temperature: The suitable operating temperature for reducers is generally between -40 ℃ and 45 ℃. If the ambient temperature is too high for a long time, it may lead to increased wear of gears and bearings, reduced effectiveness of lubricating oil, and even deformation and burning of gears, requiring more frequent maintenance.

High humidity: When the environmental humidity exceeds 90%, moisture may enter the interior of the gearbox, causing the lubricating oil to deteriorate and corrode, accelerating the wear of gears and bearings, and thus shortening the maintenance cycle.

Poor air quality: If the gearbox operates in air containing harmful substances such as dust and impurities, these substances may enter the interior of the gearbox, exacerbating wear and corrosion, reducing the effectiveness of the lubricating oil, and shortening the maintenance cycle.

Poor operating conditions

Overload and impact load: When the actual load exceeds 1.5 times the rated torque of the gearbox, the contact stress on the tooth surface will exceed the material yield limit. The instantaneous impact torque generated by frequent start stop or load mutation can lead to the initiation of micro cracks on the tooth surface, accelerate component damage, and shorten maintenance cycles.

High speed light load or low-speed heavy load: During high-speed light load, rolling bearings may slip, causing sliding friction between the raceway and the ball bearings, resulting in thermal wear; When operating at low speeds and heavy loads, the sliding bearing cannot form a dynamic pressure oil film, resulting in boundary friction and accelerated wear of the bearing shell. Both of these situations can shorten the maintenance cycle.

Improper lubrication management

Lubricating medium failure: Choosing the wrong viscosity grade of lubricating oil can result in insufficient oil film thickness and inability to isolate metal surfaces; Choosing the wrong type of grease may result in dry wear of the bearing; Oil contamination and hard particles becoming "abrasives" can cause three body wear, which can affect lubrication effectiveness and shorten maintenance cycles.

Improper lubrication method: When using splash lubrication, the oil level is too low, and the lubricating oil cannot splash onto the planetary carrier bearings during high-speed operation; The blockage of the circulation lubrication system pipeline and the oil supply pressure being less than 0.1MPa can lead to insufficient bearing lubrication, accelerate component wear, and thus require a shortened maintenance cycle.

Installation and commissioning deviation

Coaxiality out of tolerance: If the alignment deviation between the motor and the reducer coupling is too large, with a radial deviation greater than 0.1mm or an angle greater than 0.05mm, it will cause the input shaft to bear additional bending moments; Knocking on the bearing during installation can cause the inner ring to loosen with the shaft neck, leading to micro motion wear and resulting in "false Brinell indentation" on the outer raceway of the bearing. This uneven wear of the gear along the tooth width direction can shorten the maintenance cycle.

Improper adjustment of meshing clearance: If the side clearance is too small, the tooth surface will be squeezed under load, resulting in adhesive wear; Excessive backlash can generate impact loads during start-up or reversing, leading to tooth surface peeling and accelerating gear wear, shortening maintenance cycles.