Novi koncepti hidravličnih naprav za viličarje v Tovarni viličarjev Litostroj

J. Pezdirnik

Ventil 3 (1997) 45–46.

Abstract

Kratek prispevek, ki je napisan kot poročilo, opisuje konceptualne spremembe na hidravličnih napravah, predvsem za težje viličarje, razvitih po letu 1991 v litostrojski Tovarni viličarjev. V hidravlično krmilje je bilo uvedeno krmiljenje s pomočjo krmilne palice ("joystick") ter z zaznavalom obremenitve (load sensing). Namesto prejšnjih sestavin, ki jih je dobavljala pretežno Prva Petoletka - Srbija, so bile uporabljene sestavine zahodnih proizvajalcev kot so Danfoss, Vickers, Rexroth, Commercial Hydraulics in Hydac. Pri 25 t viličarju ni šel razvoj preko prototipa, pač pa smo takoj začeli z izdelavo osmih viličarjev novega tipa. Ko so ti uspeli, smo po istih principih začeli z razvojem in gradnjo dveh 42 t viličarjev. Njuna hidravlična naprava je sicer popolnoma različna od tiste na 25 t viličarju. En 42 t viličar je bil že dobavljen kupcu in je uspešno začel z obratovanjem. Hidravlične sestavine za oba tipa obeh težkih viličarjev so bile kupljene kot posamični kosi; hidravlični sistemi so bili razviti, konstruirani in zgrajeni ob koriščenju samo lastnega znanja v Tovarni viličarjev - Litostroj.

The short contribution, written as a report, describes the concept changes on the hydraulic systems especially for the heavier fork lift trucks developed after the year 1991 in the Litostroj's Fork lift trucks factory. The joy stick and the load sensing controls were introduced in the hydraulic control systems. Instead of previous components, delivered mostly from Prva Petoletka - Serbia, the components of the western producers were applied, such as Danfoss, Vickers, Rexroth, Commercial Hydraulics and Hydac. At the 25 t fork lift truck there was no prototype, but we have started from the beginning with eight pieces of the new type of this fork lift truck. As it succeeded the development and the building of the two 42 t fork lift trucks proceeded on the same principles. Yet the hydraulic system is quite different from those of the 25 t truck. One 42 t lift truck was already delivered to the buyer and successfully set in operation. The hydraulic components for the both types of the two heavy trucks were bought by single pieces and the whole hydraulic systems were developed, constructed and built using only own knowledge in the Litostroj's Fork lift truck factory.

Keywords: pogonsko-krmilna hidravlika, viličar, razvoj, power-control hydraulics, fork lift truck, development

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