Worm And Worm Wheel SDE7 Dual Axis Slew Drive With Planetary
Gearbox For PV Trackers
Dual Axis Slew Drive Description
The solar trackers can be divided into single-axis trackers and
dual-axis trackers by the mechanical characteristics. Since
dual-axis systems are able to obtain an optimal tracking of the
sun, they are more popular in all the types of PV, CPV, CSP
concentrated solar technologies. We have hydraulic motors, electric
motors, stepper motors to match the slewing drives according to its
different working conditions, the electric motor parameter is as
below:
| Motor Data | Planetary Gearbox Data |
| Rated Voltage | 24VDC | Ratio | 398:1 |
| Rated Current | 1.3A | Output Torque | 43Nm |
| Rated Speed | 800Rpm | Output Speed | 2Rpm |
| Protected Level | IP55/65/66 | Noise | <60db |
SDE Model Slewing Drive Performance Parameters
| SDE Model Performance Parameters |
| Model | Rated Output Torque (N.m) | Tilting Torque (kN.m) | Holding Torque (kN.m) | Axial Load (kN) | Radial Load (kN) | Ratio | Efficiency | Precision (degree) | IP | Working Tep (℃) | Self-locking | Weight (kg) |
| 3" | 600 | 1.5 | 5.8 | 10 | 15 | 31:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 25kg |
| 5" | 800 | 6 | 9.2 | 16 | 27 | 37:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 34kg |
| 7" | 2000 | 7.5 | 13.2 | 34 | 58 | 57:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 56kg |
| 9" | 4300 | 16 | 27.2 | 60 | 130 | 61:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 92kg |
| 12" | 5800 | 25 | 41 | 77 | 190 | 78:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 160kg |
| 14" | 6750 | 48 | 45 | 110 | 230 | 85:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 224kg |
| 17" | 9460 | 67 | 54 | 142 | 390 | 102:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 320kg |
| 21" | 16000 | 89 | 65 | 337 | 640 | 125:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 492kg |
| 25" | 21450 | 112 | 89 | 476 | 950 | 150:1 | 40% | ≤0.15 | 66 | -40～+80 | Yes | 705kg |
Q&A
What does the paramters in the technical drawing mean?
Tilting Moment Torque: Torque is the load multiplied by distance
between the position of load and the center of slewing bearing. If
the qorque generated by load and distance is greater than the rated
tilting moment torque, slewing drive will be overturned.
Radial load: Load vertical to the axis of slewing bearing
Axial load: Load parallel to the axis of slewing bearing
Holding torque:It is the reverse torque.When the drive is rotating
reversely, and parts are not damaged,The maximum torque achieved is
called holding torque.
Self-locking: Only when loaded, the slewing drive is not able to
reverse rotate and thus called self-locking.
