Open-centred large roller bearing, e.g. for offshore platform crane - has ring measurement test head mounted in roller body space with cables fed between rings

摘要

The open-centred large roller bearing contains single- or multipart inner (3) and outer (2) rings with rollers on a roller path path in a roller body space between the rings. A test head can be applied to the rings for non-destructive testing of the ring surfaces in the roller path or path transition regions. The test head (18, 19) is mounted int he roller body space (35). Its test and supply cables, which can be in a common housing with the head, are fed out of the space via the bearing gap between the rings. The test heads can be accommodated in a housing (17), each with four electrodes (20, 21, 22, 23). The outer electrodes serve to apply the current potential while the inner electrodes pick-up the measuring current. Throughbores accommodate control leads. e.g. via plug contacts for drivers and measuring appts. USE/ADVNATAGE - Esp. for use in large cranes on offshore platforms, the roller bearing has a simple arrangement for applying bearing ring test head for accurate measurement of ring length and depth. Contactless testing.