Chapter 6 Auxiliary Components for Hydraulic Systems △V V=1 (6-4) 2.Determination of pressure (1) Calculation for lowest operating pressure P2 The lowest operating pressure p2 include two parts,which can be calculated by P2=pmax-∑Amix (6-5) (2)Determination of highest pressure P 11 Homepage List Upwards Dowrwards Return Exit
Chapter 6 Auxiliary Components for Hydraulic Systems 11 2 max max i p p p = − 2. Determination of pressure （1） Calculation for lowest operating pressure 2 p The lowest operating pressure include two parts, which can be calculated by 2 p （2） Determination of highest pressure 1 p （6-5） ) ] 1 ) ( 1 [( 1 2 1 1 1 0 0 n n n p p p V V − = （6-4）
Chapter 6 Auxiliary Components for Hydraulic Systems Determination of highest pressure in an accumulator p should consider the factors of lifetime of system and stability. Below an empirical formula is recommended. p1=(1.25~1.18)p2 (6-6) (3) Determination of charged gas pressure Po For a bag type accumulator, pP=(0.8~0.85)p (6-7) where: Po:Vo -are pressure and volume before charged gas, pare the highest operating pressure and volume at this pressure. p2,V2-are the lowest operating pressure and volume at this pressure and n is the exponential. 12 Homepage List Upwards Downward止 Return Exit
Chapter 6 Auxiliary Components for Hydraulic Systems 12 Determination of highest pressure in an accumulator should consider the factors of lifetime of system and stability. Below an empirical formula is recommended. 1 p （3） Determination of charged gas pressure 0 p For a bag type accumulator, 0 1 p = (0.8 ~ 0.85) p （6-7） 1 2 p p = (1.25 ~ 1.18) （6-6） 0 0 1 1 2 2 , are pressure and volume before charged gas, , are the highest operating pressure and volume at this pressure, , are the lowest operating pressure and volume at this pressure and n is p V p V p V —— —— —— the exponential. where:
apter 6Auxiliary Components for Hydraulic Systems 6.2 Filters 6.2.1 Functions of a filter 6.2.2 The types of filters 13 Homepage List Upwards Dowrwards Retun Exit
Chapter 6 Auxiliary Components for Hydraulic Systems 13 6.2 Filters 6.2.1 Functions of a filter 6.2.2 The types of filters