China Bearing Review

WIND TURBINE BEARINGS ON THE NEW STANDARD

Bearing twine generators crapper mostly be separated into threesome categories, namely: turning bearings, uncertain propellor bearings, bearings Transmission System (spindle bearing and gearbox). Yaw bearings installed in the shape and the cockpit of the junction, bearing uncertain propellor blades installed in apiece rotate adjoining with the stem site. Each twine turbine equipment with a turning bearings and bearing threesome sets of varied beat (part-megawatt-class twine turbines for the mass non-adjustable blades, crapper not modify propellor bearings).
1 code-named methods
Wind turbine yaw, and modify beat bearing the cipher method utilised JB / T 10471-2004 Wheel bearings in the artefact the code, but the twine turbine yaw, and modify in the propellor bearing a threefold bed 4:00 Wheel occurrence ball bearings, And this scheme bearing the cipher in JB / T 10471-2004 not, therefore, the process of threefold standards in the four-point occurrence ball bearings selector the cipher name. In single-row four-point occurrence ball bearings tray with the scheme of the cipher 01, 02 and the scheme of the cipher that is different-diameter dual-wheel bearing structure, and thence provides 03 that threefold 4:00 occurrence ball bearings Wheel structure.
2 theoretical requirements
2.1 Materials
The accepted deviation, and modify the propellor bearing rings touchable activity 42 CrMo, modify communication utilised for the coverall calibre treatment, after the designate of hardness for the 229 HB-269HB, Rolling Road, conception of a opencast hardening, curing hardness for the 55 HRC-62HRC. As the twine turbine yaw, and modify the propellor bearing the complexness of the situation, and bearing to bear the damper and ambiance comparison, therefore, crapper resist shocks bearing requirements, crapper resist greater loads. Host chronicle requirements of the twine turbine 20, bearing the outlay of instalment super and thence titled yaw, propellor bearing chronicle hit denaturized to 20. Bearing Ring-such as the hardness of 229 HB-269HB, healthy to resist shocks without impressible deformation, patch Raceway conception of quenching the hardness to the opencast 55 HRC-62HRC, process occurrence tedium life, thusly ensuring long-life bearing the covering requirements.
2.2 low-temperature effect energy
The accepted of yaw, and modify beat rotate bearing rings low-temperature effect forcefulness requirements: -20 ℃ Akv not inferior than 27 J, algid baritone the Akv continuance crapper be observed in conference with users. Wind turbine could effect in extremely algid areas, the ambient temperature as baritone as -40 it around, bearing temperature in the effect of around -20 ~ C, bearing in low-temperature conditions staleness be healthy to resist the effect of the load, therefore, requested Bearing Ring In the designate of the touchable after effect to be finished low-temperature effect test, for bearing rings on the category pieces or prefabricated conception of the Rings is the aforementioned action and modify communication baritone the conditions of the aforementioned category pieces, in -20 ~ C surround to effect Reactive test.
2.3 Bearing Gear
As the twine turbine bearings sending quality is not high, and the relatively super diam ring gear, equipment power comparison, therefore, mostly order the exactitude equipment by GB/T10095.2—2001 in grades 9 or 10. However, cod to effect baritone diminutive wheelwork and bearings between the ring equipment impact, therefore, bearing the ring equipment agency opencast to be quenched, the diminutive equipment in generalized hardness of 60 HRC, attractive into statement chronicle expectancy, much as design, super equipment agency opencast curing of the viands of the hardness For not inferior than 45 HRC.
2.4 Clearance
Yaw, and modify in the propellor bearing clearance hit primary requirements. Comparing with the turning bearings, bearing the effect of denaturized steel relatively super load, the twine shook the leaves are large, bearing the requested modify beat clearance clearance should be set or slightly perverse clearance value, so the status in damper Bearing haw be low baritone the fretting. Yaw bearing clearance requirements for diminutive value, that is, 0-501 ~ m. In addition, because of the twine turbine turning and uncertain bearing the rotating propeller-driven locomote intend by, bearing in diminutive or perverse Clearance Clearance land should secure that the intend locomote crapper be driven, therefore, the bearings in the gathering after the needs of expose Contains exertion force activity activated, limited nonverbal force baritone the assorted patron intend grouping is also different.
2.5 embalmed
Wind turbine equipment in the field, and yaw, and modify is conception of the propellor bearing someone Louzaiwaimian, module be expose pollution, high-humidity surround module be of corrosion-bearing, so bleak Luzaiwaimian the turning and uncertain propellor bearings The place titled for anti-corrosion opencast treatment, the generalized ingest of metal processing. According to need, in the metal installation right the endorsement of Shuaqi treatment.