Bearing in pile-driving and drilling machines
Sector: Construction machines, civil engineering
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Function
Pile-driving and drilling machines must function reliably.
When used outdoors on building sites, the swivelling joints of the leaders and the bearing positions on the swivelling joints are subjected to harsh conditions, such as high temperature fluctuations, moisture and dirt. When pile-driving, impacts and shocks subject the bearing position to stress.
When used outdoors on building sites, the swivelling joints of the leaders and the bearing positions on the swivelling joints are subjected to harsh conditions, such as high temperature fluctuations, moisture and dirt. When pile-driving, impacts and shocks subject the bearing position to stress.
Bearing with KS PERMAGLIDE® P2 plain bearing bushes and P2 thrust washers
In the realised application, the pins of the swivel joint bearing run in two
KS PERMAGLIDE® P20 plain bearing bushes. Two KS PERMAGLIDE® P20 thrust washers sit between the arms of the joint. The plain bearings compensate for misalignments in the roughly welded joints. The polymer sliding layer of the material KS PERMAGLIDE® P20 is insensitive to high edge loading.
When used with a grease lubricant, the plastic in this application has good damping performance when subjected to vibrations and impacts. This means that the impacts are diminished by the time they reach the hydraulic excavator.
By using the KS PERMAGLIDE® P20 plain bearings, the bearing functions reliably despite the difficult operating conditions.
KS PERMAGLIDE® P20 plain bearing bushes. Two KS PERMAGLIDE® P20 thrust washers sit between the arms of the joint. The plain bearings compensate for misalignments in the roughly welded joints. The polymer sliding layer of the material KS PERMAGLIDE® P20 is insensitive to high edge loading.
When used with a grease lubricant, the plastic in this application has good damping performance when subjected to vibrations and impacts. This means that the impacts are diminished by the time they reach the hydraulic excavator.
By using the KS PERMAGLIDE® P20 plain bearings, the bearing functions reliably despite the difficult operating conditions.
Advantages of KS PERMAGLIDE® P200 plain bearings
- Insensitivity to shocks and impacts
- Insensitive to edge loads
- Good damping characteristics
- High wear resistance
- Insensitivity to dirt
- Low moisture absorption
- Operating temperature range of –40 °C to 110 °C
- Low-maintenance operation with lubrication
- Lead-free
- Compliant with wDirective 2011/65/EU (RoHS II)
Application description
Tubes, posts or guide rails are driven into the ground using pile-driving machines. Drilling machines are used for drilling bores in specialist civil engineering, tunnelling, canal construction and for drilling water wells or geothermal wells. In combined pile-driving and drilling systems, either a hydraulic hammer or a
boring machine is mounted on a telescopic leader. The leader is attached to the outrigger of the hydraulic excavator. The hydraulic hammer or boring machine runs up and down the leader. The link piece between the leader and excavator takes the form of an articulated bearing. The leader is straightened laterally by free swivelling motions in this way.
boring machine is mounted on a telescopic leader. The leader is attached to the outrigger of the hydraulic excavator. The hydraulic hammer or boring machine runs up and down the leader. The link piece between the leader and excavator takes the form of an articulated bearing. The leader is straightened laterally by free swivelling motions in this way.
Description of the joint bearing
Joint bearings are articulated bearing elements based on plain bearings. Joint bearings allow swivelling motions, rotary motions and tilting motions and transfer static and dynamic forces. Maintenancefree joint bearings or joint bearings that can be re-lubricated are used depending on the applicati
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