In the “heart” of construction machinery, Orbital hydraulic motor with its unique cycloid gear meshing principle, has become a “golden power source” in the field of low-speed high-torque transmission. However, the steady beating of this “heart” cannot be separated from the refined operation and maintenance management. According to statistics, 60% of cycloidal motor failures stem from improper operation or lack of maintenance, this article will systematically sort out the operation of the whole process of the core considerations.
1. Before the start of the “physical examination”: to build the foundation of reliable operation
(1) Hydraulic system “blood vessel” inspection
The oil circuit connection is like the blood vessels of the human body, and it is necessary to ensure that the whole process is sealed reliably. Use torque wrenches to tighten the oil port joints according to the standard torque to avoid “blood vessel rupture” under high-pressure impact. Pipeline direction should avoid right-angle bends to prevent the formation of “thrombus” - oil eddy current leading to pressure loss.
(2) Fluid “blood” quality control
It is recommended to use anti-wear hydraulic oil, and HV low-temperature hydraulic oil is recommended for low-temperature environment (below -20℃). Regularly check the contamination level by particle counter, as accurate as blood test, once the NAS level exceeds 8, the hydraulic oil needs to be replaced immediately.
(3) Mechanical Installation Calibration
The coaxiality error of the output shaft and load coupling should be ≤0.05mm, as to ensure the precise occlusion of the joints. The mounting bracket needs to be made of cast iron or steel structure. Insufficient rigidity will lead to deformation, triggering abnormal wear of internal parts.
(4) Electronic control system “nerve” verification
Power stability needs to be controlled within ± 10% fluctuations, as to maintain the stability of nerve conduction. Mechanical control system to test the full-stroke sensitivity of the operating handle, to ensure that the “nerve command” is accurately conveyed.
2. “Guardianship” in operation: Capturing the clues of abnormal signals
(1) Key parameters “vital signs” monitoring
Working pressure: Continuously exceeding the rated pressure by 20% will lead to “heart overload”, requiring immediate shutdown for inspection.
Oil temperature: 65 ℃ warning as a fever signal, 80 ℃ danger threshold means that the system has been in a “high fever” state.
Speed: 10% over the rated speed will increase wear and tear, just like excessive joint movement triggering damage.
(2) Abnormal signal “diagnostic code” analysis
Abnormal noise: high-frequency whistling suggests insufficient viscosity of oil or poor oil suction, the need to check the “respiratory tract” (suction piping); periodic noise like a joint popping, indicating potential failure of bearings or gears.
Increased vibration: radial vibration reflects coaxial deviation or bearing damage; axial vibration points to the wear of the distribution disk or stator gap abnormalities, like “bone misalignment” triggered by the chain reaction.
3. Continuous progression of O&M management
This article has laid out the basic framework for the reliable operation of Orbital hydraulic motors, but the secrets of efficient operation and maintenance go far beyond that. In the following chapters, we will explore in depth the considerations for efficient operation of Orbital hydraulic motor and provide equipment managers with a complete chain of knowledge from basic operation to intelligent operation and maintenance. Stay tuned.
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