RCJ Excavator Simulation

WRA Series Rotary Joint 360° Cab Rotation Demonstration

Waiting

RPM

0.0

Torque

0.00N·m

Flow Rate

0.0L/min

Power Loss

0.0W

Leakage

0.00ml/min

Temperature

25.0°C

RCJ Circuits

Boom

Arm

Bucket

Swing

All circuits pass through the rotary center joint, maintaining continuous flow during 360° cab rotation

Configuration

Circuits: 4

Input Pressure: 10.0 MPa

Output Pressure: 9.5 MPa (ΔP = 0.50 MPa)

Control Mode

Target RPM: 10.0 rpm(max: 20.0 rpm)

Required Flow:4.4 L/min

Time: 0.0sec | Status: Stopped

Engine: Waiting

WRA Series Specifications

Max Pressure:25 MPa

Circuits:2-4

Max Temperature:70°C

Allowable RPM:

5 MPa → 30 rpm | 25 MPa → 5 rpm

Excavator RCJ Application

The rotary center joint allows the excavator upper structure to rotate 360° while maintaining continuous flow to the boom, arm, bucket, and swing motor.

WRA series RCJ is used in 1.5 to 80 ton class excavators.

Validation Data: Excavator system efficiency ~54%, swing circuit power loss ~5.9 kW, overall machine efficiency ~10%.