Mechanical Linear Actuators
212Pages

Linear Actuators

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SERVOMECH Linear Actuators 6. Linear Actuators ILA Series page page page page page page page page page page page page page page page page

SERVOMECH Linear Actuators 1.1 SERVOMECH Linear actuators SERVOMECH mechanical linear actuators are motorised mechanical cylinders able to transform the rotary motion of a motor into the linear motion of a push rod. They are designed and manufactured for industrial applications, even the heaviest in terms of: ▪ applied load ▪ linear speed ▪ duty cycle ▪ environmental conditions. They are able to work under push or pull load. According to their configuration, they can be: ▪ statically self-locking - able to sustain static load keeping the same position when the motor is switched off; ▪...

SERVOMECH Linear Actuators 1.2 SERVOMECH linear actuators range Linear actuators ATL Series: - input drive: worm gear drive - linear drive: 1 or more starts acme screw Linear actuators BSA Series: - input drive: worm gear drive - linear drive: ball screw INPUT DRIVE worm gear drive LINEAR DRIVE acme screw ATL Series ATL 20 ATL 25 ATL 28 ATL 30 ATL 40 ball screw BSA Series Linear speed: (1.4 ... 140) mm/s Max. force: 600 N ... 350 kN Standard stroke up to 800 mm, special stroke length on request Linear speed: (2.3 ... 93) mm/s Max. force: 1 200 N ... 123 kN Standard stroke up to 800 mm,...

SERVOMECH Linear Actuators 1.2 SERVOMECH linear actuators range Linear actuators CLA Series: - input drive: worm gear drive - linear drive: 1 or more starts acme screw Linear actuators CLB Series: - input drive: worm gear drive - linear drive: ball screw INPUT DRIVE worm gear drive LINEAR DRIVE acme screw ball screw Linear speed: (2 ... 56) mm/s Max. force: 2 500 N ... 25 kN Standard stroke up to 800 mm, special stroke length on request (more details on pages 108 ... 110) Linear speed: (2.5 ... 60) mm/s Max. force: 3 300 N ... 25 kN Standard stroke up to 800 mm, special stroke length on...

SERVOMECH Linear Actuators 1.2 SERVOMECH linear actuators range Linear actuators UBA Series: - input drive: timing belt transmission - linear drive: ball screw Linear actuators UAL Series: - input drive: timing belt transmission - linear drive: 1 or more starts acme screw Linear speed: (40 ... 875) mm/s Linear speed: (23 ... 529) mm/s Standard stroke up to 800 mm, Standard stroke up to 800 mm, special stroke length on request_ special stroke length on request Motor axis parallel to actuator axis ■ attachment for EC electric motor Electric motor: ■ AC 3-phase or 1 -phase with brake ■...

SERVOMECH Linear Actuators 1.2 SERVOMECH linear actuators range Linear actuators TMA Series: - input drive: worm gear drive - linear drive: 1-start acme screw INPUT DRIVE worm gear drive LINEAR DRIVE acme screw TMA Series TMA 15 TMA 25 TMA 50 TMA 100 TMA 150 TMA 200 Linear speed: (0.12 ... 40) mm/s Max. force: (2.6 ... 200) kN Stroke up to 1 500 mm Trunnion mounted housing fixed with pins or bronze bushes Input shaft axis at 90° with respect to actuator axis Input: ▪ attachment for IEC electric motor ▪ solid shaft Electric motor: ▪ AC 3-phase Stroke end switches: ▪ proximity switches, fix...

SERVOMECH Linear Actuators 1.2 SERVOMECH linear actuators range Linear actuators ILA Series: - linear drive: 1 or more starts acme screw (ILA . A Series) - linear drive: ball screw (ILA . B Series) INPUT DRIVE acme screw ball screw IN-LINE actuators Housing mounting with pins Input: shaft and flange as input drive attachment Stroke end switches: ▪ proximity switches, fixed position on outer tube Wide range of accessories

SERVOMECH Linear Actuators 1.3 Linear actuator selection THERMAL LIMIT Linear actuators transform the rotary motion into a linear motion. This transformation involves a dissipation of energy in the form of heat. Therefore, to choose the right actuator for an application it is necessary to take into account the application duty cycle required and compare it with the actuator duty cycle permissible. The application duty cycle required Fu [%] is the ratio expressed in percentage between the actual working time under load during the reference time period of 10 minutes and the reference period...

SERVOMECH Linear Actuators 1.3 Linear actuator selection 3. Select the size as a 1st approximation Referring to the force and the linear speed required by the application, use the 1st approximation selection diagrams, according to the linear drive type as determined in the previous step (see pages 17 ... 22), to select the actuator size. 4. Mechanical checks 4.1 Structural stability check Referring to the max. push load and the stroke, check the structural stability – buckling resistance under push load - of the actuator selected in the previous step. This check should be carried out for...

SERVOMECH Linear Actuators 1.3 Linear actuator selection Example 1: 1. Application data ▪ stroke: ▪ linear speed: ▪ dynamic load: ▪ static load: ▪ working cycle: ▪ motor: ▪ application layout 300 mm 20 mm/s 4 500 N, push, constant along the entire stroke forward and backward 4 500 N, push, applied in any position of the stroke 5 complete travels (forward + backward) in 10 min AC 3-phase electric motor 2. Determination of the linear drive type Calculation of the duty cycle Fu [%] over 10 min: 2 × STROKE Nr. of cycles over ref. time period 2 × 300 mm 5 × × 100 = 25 % × × 100 = mm s LIN. SPEED...

SERVOMECH Linear Actuators 1.3 Linear actuator selection Example 2: 1. Application data ▪ stroke: ▪ linear speed: ▪ dynamic load: ▪ static load: ▪ working cycle: ▪ motor: ▪ application layout 600 mm 60 mm/s 900 N, push - pull, constant along the entire stroke forward and backward 900 N, push, applied in any position of the stroke 13 complete travels (forward + backward) in 10 min DC 24 V with brake 2. Determination of the linear drive type Calculation of the duty cycle Fu [%] over 10 min: 2 × STROKE Nr. of cycles over ref. time period 2 × 600 mm 13 × × 100 = 43 % × × 100 = mm s LIN. SPEED...