Analysis of Common Problems and Solutions for Hydraulic Rotary Actuators (Part 6): Abnormal Rotation Fault of the Output Flange (Part 1)
Release time:
2025-12-09 12:42
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In the actual operation of the hydraulic rotary actuator, "slow or stopped rotation of the output flange" is a relatively common fault. This problem will not only affect the normal operation efficiency of the equipment, but may even lead to production interruption and cause losses in severe cases. For the possible causes of this fault, the following solutions can be adopted:
Insufficient output torque.The main causes of this fault include substandard operating pressure of the actuator, operating pressure exceeding the equipment's set value, and actual load exceeding the maximum load capacity of the actuator. To address this cause, first confirm whether the operating pressure of the actuator meets the standard; at the same time, strictly control the operating pressure to ensure it does not exceed the equipment's set pressure; if the actual load has exceeded the maximum load capacity of the actuator, adjust the load in a timely manner or replace it with a suitable actuator.
Excessively small system flow Foreign objects at the oil inlet and outlet of the actuator, the presence of throttling components in the hydraulic pipeline, or pipeline damage will all result in excessively small system flow, which in turn causes abnormal rotation of the flange. To solve this problem, first check the oil inlet and outlet of the actuator and clean up any foreign objects in a timely manner; then inspect the hydraulic pipeline, remove redundant throttling components, and repair or replace the pipeline promptly if it is damaged.
Internal leakage of the control or balance valve Internal leakage of the control or balance valve will prevent hydraulic oil from effectively transmitting power, leading to flange rotation faults. To solve this problem, first disconnect the hydraulic pipeline and bypass valve, then open the oil port on the valve block, and drive the actuator through the oil port on the cylinder barrel (note that the operating pressure should not be greater than the set pressure). If there is a stable and continuous outflow of hydraulic oil from the valve surface oil port, the valve block must be replaced to resolve the internal leakage issue.
When handling related faults, it is crucial to follow the standardized procedures in the equipment operation manual to avoid aggravating the fault or triggering new hydraulic system problems due to non-compliant operations. During daily inspections, targeted attention should also be paid to pressure parameters, pipeline conditions, and valve tightness to prevent such faults in advance and ensure the stable operation of the hydraulic rotary actuator.
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