Parker HLR070, Mounting Instructions

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Commissioning HLR Mounting Instruction
38
192-510201N1 HLR 2019-04
4.2 Use at elevated ambient / operating temperatures
The operation of the HLR linear actuator at high ambient and/or operating
temperatures leads to a heating of the complete linear axis. Due to the different
expansion coefficients of the support profile and the steel strip cover, these expand
differently. With increasing ambient and/or operating temperature, the expansion
difference increases steadily. The support profile expands more than the steel strip
cover. This leads to a tightening of the steel strip cover and increases the friction
on the wear parts, which further increases the operating temperature of the linear
actuator.
Uncontrolled heating of the linear axis can lead to increased wear on the steel
strip cover and irreparable damage to the linear actuator.
Factors influencing the heating of the linear actuator

Ambient temperature
- this is the temperature of the air surrounding the linear
actuator. It is influenced by the environment of the linear actuator e.g. heating by
neighbouring devices, plant components or processes.

Opearating temperature - is the temperature of the linear actuator which is
converted into heat by the resulting power loss. The power dissipation is primarily
influenced by the operating data duty cycle and feed rate.
If one of the operating data listed below is exceeded, the tension of the steel strip
cover must be checked and corrected if necessary.

Ambient temperature >30 °C or

Duty cycle >50 % and feed rate >2 m/s
Correct tension of the steel strip cover

The HLR Linear actuator is installed and commissioned according to the manual.

Start normal operation of the linear axis (the entire system) and warm up the
linear axis.

Check the tension of the steel strip every 60 minutes (with duty cycle 80...100 %
every 30 minutes).

Stop the linear axis (the entire system) and switch off the power to the required
drives.

Loosen one of the steel strip cover terminal strips (see Figure 13, Pos. 1) Do not
entirely screw-off screws

Steel strip cover releases automatically (see Figure 13, Pos. 5) as soon as the
terminal strip was losened.

Tip: A fine marking on the steel strip and profile visualizes the adjustment of the
steel strip cover.

Retighten the screws of the steel strip cover terminal strips (see Figure 13, Pos.
2) with the tightening torque (see page 43) indicated and resume operation of the
linear axis (of the entire system).

Repeat the process described above until the linear axis has reached its final
operating temperature and no adjustment of the steel strip cover is visible.