A10VSO18DR/31L-VPA12N00 A10VSO18DFR/31L-PPA12N00 Rexroth Germany original hydraulic station hydraulic pump genuine imported

Key matching principles and steps: ① Power matching: The pump's output power (calculated by P = Q×p/600) should be 5-10% higher than the motor's rated power to avoid overload. For example, a pump with 67.5 L/min flow and 280 bar pressure outputs 31.5 kW, so match a 35 kW motor (Rexroth A2FM 63); ② Speed matching: The motor's maximum speed should match the pump's flow--if the motor requires 1500 rpm, the pump's flow at 1500 rpm should meet the motor's flow demand (e.g., A2FM 63 requires 63 L/min, so the pump's flow can be adjusted to 63 L/min via FR control); ③ Interface matching: Ensure the pump's pressure port thread (G 1 1/4") matches the motor's inlet thread, and use a high-pressure hose with the same inner diameter (DN20); ④ Control coordination: Connect the motor's speed sensor to the pump's control system--when the motor speed is lower than 1400 rpm, the pump automatically reduces pressure by 10% to protect the motor. This matching method ensures power transmission efficiency ≥90%.

Accumulator system connection precautions: ① Installation position: Install the accumulator 1-1.5m away from the pump's pressure port, with a check valve between them to prevent oil backflow when the pump is stopped; ② Pressure setting: The accumulator's pre-charge pressure should be 60-70% of the pump's working pressure (e.g., 180 bar for 280 bar working pressure), and the pump's pressure limiting value should be 10 bar higher than the accumulator's maximum working pressure; ③ Safety protection: Install a pressure relief valve (350 bar) and a burst disc (380 bar) on the accumulator pipeline to avoid overpressure; ④ Control adjustment: Adjust the FR control's response time to 0.3s to avoid pressure shocks when the accumulator is charging; ⑤ Maintenance: Check the accumulator's pre-charge pressure monthly (use a nitrogen pressure gauge) and replace the seal every 12 months. Improper connection may cause the pump to cycle between load and unload frequently, reducing its service life by 30%.