Wenzhou Prance Hydraulic Equipment Co., Ltd
Variable Displacement Pump OEM A10VO 31 Series
1.Variable Displacment Axial piston Pump of swashplate design for hydraulic open circuit system
2.Flow is proportional to drive speed and displacment .It can be infinitely Varied by adjustment of the swashplate
3.ISO Mounting Flange
4.Flange connections to SAE metric
5.2 case drain ports
6.Good suction Characteristics
Detailed description
This is a swashplate-designed variable displacement axial piston pump specially engineered for hydraulic open circuit systems. Its output flow is strictly proportional to the driving speed and displacement volume. By precisely adjusting the swashplate angle, the pump displacement can be steplessly and infinitely varied to accurately match different flow and pressure demands of the hydraulic system. The pump adopts standard ISO mounting flange design, which ensures convenient installation, reliable positioning and strong versatility for equipment assembly. It is configured with flange connections complying with SAE metric specifications, realizing standardised pipeline matching and easy modular connection. Two independent case drain ports are reserved for smooth discharge of internal leakage oil and effective heat dissipation. Meanwhile, the pump delivers excellent suction performance and stable suction characteristics, enabling reliable operation under normal working conditions and adapting to various complex hydraulic application scenarios.
Technical Data
Mechanical displacement limiter
Mechanical displacement limiter is possible on the nonthrough-drive model, NOO series but not for the model with through-drive
Vg max: for sizes i 8 to 140
Setting range Vg max to 50%Vg max stepless
Vg min: for sizes 100 and 140
Setting range Vg min to 50% Vg max stepless
Parameter
Operating pressure range -inlet
Absolute pressure at port S
Pabsmin--------------------0.8 bar
Pabsmax--------------------30 bar
Operating pressure range-outlet
Pressure at port B
Nominal pressure PN-----------280 bar
Peak pressure Pmax-----------350bar
Applications with intermittent operating pressures up to
315 bar at 10% duty are permitted.
Case drain pressure
Maximum permissible pressure of leakage fluid (at port L,L): Maximum 0,5 bar higher than the inlet pressure at port S,but no higher than 2 bar absolute pressure.
| Sizes | 18 | 28 | 45 | 71 | 100 | 140 | |||
| Displacement | Vgmax cm3 | 18 | 28 | 45 | 71 | 100 | 140 | ||
| Max speed | nmax rpm | 3300 | 3000 | 2600 | 2200 | 2000 | 1800 | ||
| Max.flow | in nmax | qv | L/min | 59.4 | 84 | 117 | 156 | 200 | 252 |
| in 1500r/min | 27 | 42 | 68 | 107 | 150 | 210 | |||
| (Δp=280bar)
Max.power |
in nmax | Pmax | Kw | 27.7 | 39 | 55 | 73 | 93 | 118 |
| in 1500r/min | 12.6 | 20 | 32 | 50 | 70 | 98 | |||
| (4p=280bar)
Max.torque |
in Vgmax | Tmax | Nm | 80.1 | 125 | 200 | 316 | 445 | 623 |
| Weight | m | Kg | 12 | 15 | 21 | 33 | 45 | 60 | |
Parameter relations
| Flow | qv=(Vg ∙ n ∙ ηv) / 1000 | I/min |
| Drive Torque | T=(1.59 ∙ Vg ∙ Δp) /100 ∙ ηmh =(Vg ∙ Δp)/20 ∙ π ∙ ηmh | Nm |
| Drive Power | P=(T ∙ n)/9549=(2π ∙ T ∙ n)/60000=(qv ∙ Δp)/600 ∙ ηt | kW |
Vg=[cm3]Geometry displacement each rotate
Δp= [bar] Pressure drop/differential
n= [rpm] Rotary speed
ηv = Cubage's efficiency
ηmh= Mechanical-Hydraulic efficiency
ηt= Overall efficiency
