Dynaspede designs a variety of custom-built automated, computerized test rigs for endurance study on servo-hydraulic and electro-mechanical actuators and actuator motors. These test benches perform various tests in the proper sequence, simulate programmable load profiles, and acquire / and store data on performance parameters of the test actuators / motors.
The test rigs are capable of conducting following routine and endurance tests on actuators:
- Routine Tests
- Phase Sequence Test
- Small Torque Test
- Torque Switch Test
- Limit Switch Test
- Position Feed Test
- 4-20mA command signal
- Endurance Tests
- Cyclic Load:
- Temperature Rise Test
1. Phase Sequence Test:
The test is conducted to check and correct the direction of rotation of valve actuator with respect to the incoming supply phase sequence. If the direction of rotation is incorrect, the incoming phase sequence is changed, by clicking t he sequence button on the computer, until the direction of rotation actuator is corrected, when tested for both directions.
2. Stall Torque Test:
In this test, the loading of the test actuator is increased for a selected direction of rotation till stall condition. All the input and output parameters of the actuator such as starting torque/current, stall torque/current, and supply voltage are displayed and recorded at stall.
Once the actuator is stalled, loading is decreased till the motor starts running again with the recording of the pull up torque and current values. The test is repeated three times to get the average value.
3. Torque Switch Setting:
This test helps proper setting and calibration of the torque switch provided on the test actuators. To conduct this test, the direction of test rotation and the torque value setting required is defined on the PC. The actuator is automatically started with the load corresponding to set the torque. The torque switch is to be manually adjusted until it trips. PLC stops the actuator once the torque switch trips. The sequence is repeated until the torque switch is properly set for both directions.
4. Limit Switch Setting:
The test allows proper setting of the limit switches provided on the actuators (for setting the maximum rotational limit). To conduct this test, define the value of set turns and the number of open-close operations. The actuator is started automatically with the instructions displayed on the PC for manual setting of the limit switch for the set turns in both the directions.
5. Position Feedback:
This test is useful for calibrating the position feedback signal corresponding to the set turns. On starting the test, the actuator starts automatically with the position feedback signal being displayed on the PC screen. Adjust MAX and MIN setting in sensor for getting required signal (4-20mA) corresponding to the set turns. The PC stops the actuator once the limit switch is tripped.
6. 4-20mA command signal:
In this test, the command signal for the position controller of the actuator is set from the PC in the range of 4-20mA using the slider provided on the PC. After starting the test, actuator is started automatically to verify the position controller functionality. The test ends with the verification of the position feedback signal.
1. Cyclic Load:
This test is performed for endurance study of the test actuator. The test performs Torque Switch trip cycles, Limit switch trip cycles, and Normal Run Cycles for specified cycle durations. The test actuator rotary travel, torque transmission, body temperature, winding resistance (cold / hot), input voltage, current, PF, speed, power and direction are monitored and recorded.
2. Temperature rise test:
The test is performed to monitor and record the motor winding temperature rise when run under predefined cyclic loads.
On starting the test, the cold resistance of the motor is first recorded and the actuator is started. The pre-set loads are applied for the set durations with the monitoring and recording of the hot resistance of the winding at specified durations. The recorded values are used to determine the temperature
rise in the motor.