Performance and selection of the hottest sliding b

2022-08-21
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Performance and selection of sliding bearing grease

1. Sliding bearings can also be lubricated with grease. The following points should be considered when selecting grease:

(1) when the bearing load is large and the speed is low, the grease with small cone penetration should be selected, otherwise, the grease with large cone penetration should be selected. High speed bearings use grease with smaller cone penetration and good mechanical stability. Special attention should be paid to that the viscosity of the base oil of the grease should be lower

(2) the selected grease is still far from commercialization. The drip point is generally higher than the working temperature ℃. Under the condition of continuous operation at high temperature, be careful not to exceed the allowable temperature range of the grease

(3) when the sliding bearing works in water or wet environment, calcium base, aluminum base or lithium base grease with good water resistance should be selected

(4) choose lubricating grease with good adhesion

2. Selection of lubricating grease for sliding bearing:

Load <1MPa, journal circumferential speed less than 1m/s, maximum working temperature 75 ℃, choose No. 3 calcium base grease

load 5MPa, journal circumferential speed 0 M/s, the maximum working temperature is 55 ℃, and No. 2 calcium base grease is selected

load > 6.5MPa, so as to ensure the brightness after sales. The circumferential speed of the journal is less than 0.5m/s, and the maximum working temperature is 75 ℃. No. 3 calcium base grease is selected

load < 6.5MPa, journal circumferential speed 0 M/s, the maximum working temperature is 120 ℃, and No. 2 lithium grease is selected

load > 6.5MPa, journal circumferential speed below 0.5m/s, maximum working temperature 110 ℃, choose No. 2 calcium sodium base grease

load 5MPa, the circumferential speed of the journal is less than 1m/s, the maximum working temperature is ℃, and No. 2 lithium grease is selected

load> 5MPa, journal circumferential speed 0.5m/s, maximum working temperature 60 ℃, choose No. 2 calender grease

calcium sodium base grease should be considered under the condition of humid environment and temperature of ℃. In a humid environment, when the working temperature is below 75 ℃, aluminum base grease can also be used instead of No. 3 calcium base grease. When the working temperature is ℃, lithium grease or barium grease can be used. When centralized lubrication, the consistency should be smaller

3. Lubrication cycle of lubricating grease for sliding bearing:

accidental work, unimportant parts: shaft speed <200r/min, lubrication cycle once every 5 days; The shaft speed is greater than 200r/min, and the lubrication cycle is once every 3 days

intermittent operation: shaft speed < 200r/min, lubrication cycle once every 2 days; The shaft speed is greater than 200r/min, and the lubrication cycle continues to be sold vigorously in the current impact testing machine market once a day

continuous operation, working temperature less than 40 ℃: shaft speed <200r/min, lubrication cycle once a day; The shaft speed is greater than 200r/min, and the lubrication cycle is once per shift

continuous operation, working temperature ℃: shaft speed < 200r/min, lubrication cycle once per shift; The shaft speed is greater than 200r/min, and the lubrication cycle is twice per shift. (end)

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