Slide bearings - Wolf Kunststoff-Gleitlager GmbH

CC CC CCMathematical example13.5.7.2. Calculation of the emerging sliding surface temperatureThe emerging sliding surface temperature is determined by means of formula (19).ϑGFϑGFN= + ϑamb20°CkpvϑGFN48°CϑGF = + ϑamb− 20°C ⇒ + 65°C − 20°C = 85°Ckpv1,21PrefaceContentswith:ϑ GFN: nominal temperature of the sliding surface; ill. 29 with v = 0,5 m/min reveals ϑ GFN= 48°Cϑ amb: ambient temperature; for this task ϑ amb= 65°C is given13.5.7.3. Temperature of the slide bearing bushThe temperature of the slide bearing bush measured inside the cross-section of the slide bearing is calculatedby means of formula (20).ϑGF+ ϑamb85°C + 65°CϑL =⇒= 75°C22wiht:ϑ GF: temperature of the sliding surface, taken from 13.5.7.2 = 85°Cϑ amb: ambient temperature, for this task ϑ amb= 65°C is given13.5.8. Attachment check of the slide bearing bushIn order to guarantee a secure attachment of the slide bearing bush by means of simple pressing the followingcondition must be fulfilled:MaterialoverviewDesignguidelinesMathematicalexampleTribologyϑ G< ϑ GzulFirst the maximum permissible casing temperature – for pressing-in attachment – for ZX-324V2T withϑ Gzul= 130°C has to be taken from ill. (2) (page 13).13.5.8.1. Calculation of the emerging casing temperature by means of formula (21)ϑL+ ϑamb75°C + 65°CϑG = == 70°C2 2with:ϑ L: temperature of the slide bearing bush, taken from 13.5.7.3 = 75°Cϑ amb: ambient temperature, for this task ϑ amb= 65°C is giveninserted into the above-mentioned condition it reveals:ϑG< ϑGzul⇒°70°C < 130 CAs this condition is fulfilled, the bushing can be attached by means of simple pressing.Conditions ofinstallationSlide bearings(cylindrical)Slide bearings(with collar)IndexWolf Kunststoff-Gleitlager GmbH • Heisenbergstr. 63 - 65 • 50169 Kerpen-Türnich • Tel. 02237/9749-0 • Fax. 02237/9749-2047