Analysis of Common Problems and Solutions for Spiral Hydraulic Rotary Actuators (VII): Abnormal Rotation Fault of Output Flange (Part 2)
Release time:
2025-12-11 12:31
Source:
There are three additional typical causes for the fault of slow or stopped rotation of the output flange. Corresponding targeted solutions can be adopted based on these causes to ensure the hydraulic rotary actuator returns to normal operation:
4. Leakage of the Main Seal of the Piston Rod or End Cover
Leakage of the main seal of the piston rod or end cover will lead to the failure to maintain the internal pressure of the hydraulic rotary actuator, thereby affecting the rotation of the flange. To address this situation, first remove the oil pipe on the valve block and the oil plug on the cylinder barrel, then inject hydraulic oil through the oil port on the cylinder barrel and conduct a pressure-holding test (refer to professional operation specifications for the pressure-holding test). If leakage is detected, the main seal components should be replaced in a timely manner.
5. Dust and Rust on the Friction End Face of the Hydraulic Rotary Actuator
Accumulation of dust and formation of rust on the friction end face of the hydraulic rotary actuator will increase the operation resistance of components and cause obstruction to flange rotation. For such problems, it is necessary to disassemble the hydraulic rotary actuator, thoroughly clean the dirt inside and on the dust seal. If the dust seal has aged or been damaged, it should be replaced simultaneously to avoid recurrence of such problems in the future.
6. Expansion of Seals and Bearings Caused by Different Components of Transmission Hydraulic Oil
This problem only occurs when the standard-type hydraulic rotary actuator is used with special hydraulic oil or other transmission media. Incompatible oil will cause the expansion of seals and bearings, hindering flange rotation. To resolve this fault, disassemble the hydraulic rotary actuator and replace the seals and bearings that are compatible with such hydraulic oil or transmission fluid. If there are technical doubts during the selection and replacement process, professional technical personnel can be contacted in a timely manner for assistance.
The above three types of faults are mostly related to component wear, pollutant intrusion or medium incompatibility. In daily use, it is necessary to do a good job in dust-proof protection of the hydraulic rotary actuator, replace seals regularly and ensure the use of suitable hydraulic oil.
If you encounter technical difficulties during the fault handling of the hydraulic rotary actuator, you can contact us at any time to obtain accurate maintenance guidance and minimize the impact of faults on production.
Other Blog
It analyzes the latter three causes of abnormal rotation of the output flange of the spiral hydraulic rotary actuator (leakage of the main seal of the piston rod or end cover, dust accumulation and rust on the friction end face, and expansion of seals and bearings caused by incompatible hydraulic oil), puts forward targeted treatment schemes, and also mentions relevant daily maintenance precautions and technical support channels.
This article elaborates on the troubleshooting and solutions for various causes of abnormal rotation of the output flange of the hydraulic rotary actuator (including insufficient output torque, excessively small system flow, and internal leakage of the control or balance valve), and emphasizes the operational specifications and key points of daily inspections.
This article analyzes the causes and solutions for the problem of insensitive operation or no response of hydraulic rotary actuators.
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This article analyzes the causes and solutions for the insufficient rotation angle of hydraulic rotary actuators.
After eliminating problems of the hydraulic rotary actuator itself, this article analyzes the causes and countermeasures of balancing valve holding pressure loss in hydraulic rotary actuators from the perspective of the balancing valve.
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