As the core component of a hydraulic system that converts hydraulic energy into mechanical energy, the selection process of a orbital hydraulic motor requires a comprehensive consideration of four major dimensions: load characteristics, operating conditions, control accuracy and cost budget. In this article, we will compare a variety of orbital motors to provide you with reliable Orbital motor reviews.
1. Load characteristics analysis
(1) Torque: Theoretical torque is equal to the working pressure multiplied by the displacement, divided by 2Π, and multiplied by the mechanical efficiency. Excavator bucket torque needs to cover the digging resistance torque, usually need to choose the rated torque over the calculated value of 20% of the motor.
(2) Speed range matching
High-speed scenarios (≥500r/min): such as conveyor belt drive, give preference to variable or two-speed motors, taking into account the needs of efficiency and speed regulation.
Low-speed scenario (≤200r/min): such as crane winch mechanism, adopt quantitative motor or low-speed high-torque design to avoid gear reduction loss.
(3) Pressure
Pressure and flow of the system synergy, low pressure (≤ 10MPa): suitable for light load equipment (such as food packaging line); medium pressure (10-20MPa): engineering machinery, agricultural machinery mainstream selection; high pressure (20-35MPa): mining machinery, deep-sea equipment requires multi-stage orbital motor.
Flow range: standard flow (≤ 100L/min): ordinary hydraulic system. Large flow (100-300L/min): need to match the high pressure piston pump (such as Rexroth A4VSO series). When selecting, make sure that the rated pressure of the motor is ≥ the highest pressure of the system, and the rated flow rate is ≥ the maximum demand flow rate of the system.
2. Working conditions: installation space optimization
Compact design: Adopt lightweight alloy type (e.g. 6061-T6 aluminum alloy) to reduce weight by 25%, suitable for aviation ground equipment.
Interface compatibility: confirm the flange size, shaft extension form (straight shaft / spline shaft) and equipment matching, to avoid non-standard customization costs.
3. Control precision hierarchy: leap from open loop to closed loop
(1) Precision demand hierarchy
Open-loop control: accuracy of about 5% (depending on the resolution of the proportional valve), applicable to ordinary transmission.
Closed-loop control: accuracy up to ±0.5° (with high-resolution encoder), applicable to CNC machine tool indexing table.
(2) Dynamic response calibration
High-frequency proportional valve: select the valve group with frequency response ≥100Hz, with low pulsation motor (pulsation ≤3%), to realize smooth speed regulation.
Sensor configuration: speed encoder (incremental/absolute) or torque sensor, selected according to the control strategy.
4. Cost Estimation
Conventional metal-based orbital motors have a lower unit cost, but shorter maintenance intervals and service life, while ceramic-based orbital motors have a higher unit cost, but longer maintenance intervals and service life. When choosing a motor, you need to choose the most suitable product according to the specific requirements.
HANJIU produces and sells various types of orbital motors, which are tested before leaving the factory, so the quality is guaranteed. If you want to know more about Orbital motor reviews, welcome to our official website.
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