The Rexroth A4VG180 piston pump is an oblique-axis axial piston
variable displacement pump for closed circuit hydrostatic
transmission. Here are some common features and application
scenarios for the A4VG180 plunger pump:
● Features: It has a fixed displacement and is used for hydrostatic
transmission in a closed system; the cylinder block and the oil
distribution plate adopt spherical oil distribution, which can
automatically align during rotation, with small peripheral speed
and high efficiency; the drive shaft can withstand Radial load; low
noise.
●Application scenarios: Widely used in hydraulic systems in
shipbuilding, petrochemical, mining, construction and other
industries, such as steering gear hydraulic pumps, etc.
The main parameters of Rexroth A4VG180 plunger pump include:
1. Displacement: The maximum displacement is 180cm³;
2. Charge pump displacement: (at 20bar) is 39.8cm³;
3. Maximum speed: 2500rpm;
4. Limiting speed: 2900rpm;
5. Maximum destruction speed: 3000rpm;
6. Minimum speed: 500rpm;
7. Flow rate - maximum speed: 450L/min.
| Displacement (cm3) | 28 | 40 | 56 | 71 | 90 | 125 | 180 | 250 |
| Flow (L/min) | 119 | 160 | 202 | 234 | 275 | 356 | 450 | 600 |
| Power (kW) | 79 | 107 | 134 | 156 | 183 | 238 | 300 | 400 |
| Weight (kg) | 29 | 31 | 38 | 50 | 60 | 80 | 101 | 156 |
Common faults and troubleshooting methods of Rexroth A4VG180
plunger pump are as follows:
1. Excessive working noise: It may be caused by air in the oil
pump, low oil level in the oil tank, improper installation of the
oil pump and motor, excessive viscosity of the hydraulic oil, etc.
It can be solved by opening the oil pump filling port when the pump
is running, allowing the air in the pump to be discharged from the
filling port, adding enough oil, checking and adjusting the
concentricity of the oil pump and motor installation, and selecting
hydraulic oil with appropriate viscosity.
2. The pointer of the pressure gauge is unstable during operation:
serious wear between the oil distribution plate and the cylinder or
the plunger and the cylinder, the variable angle of the variable
mechanism is too small, the oil inlet pipe is blocked, the oil
suction resistance increases, and air leakage is possible. causing
this fault. In this regard, you can check and repair the mating
surface between the oil distribution plate and the cylinder block,
grind and assemble the single cylinder, replace the plunger,
tighten the screws at each connection, eliminate leakage, and
select hydraulic oil of appropriate viscosity.
