Hydraulic motors - Variable displacement
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HY D R AU LIC M OTORS VARIABLE DISPLACEMENT

Design, characteristics and advantages . . . . . . . . . . . 3 HYDRAULIC MOTORS VARIABLE DISPLACEMENT Efficiency and operating conditions . . . . . . . . . . . . . . . 4 Order code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Dimensions MV series motors. . . . . . . . . . . . . . . . . . . . . 7 Dimensions MVSI series motors. . . . . . . . . . . . . . . . . . . 9 Dimensions MVA series motors. . . . . . . . . . . . . . . . . . . 11 Displacement control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Options | Accessories . . . . . . . . . . ....

Definition & advantages ► Main applications Suitable for use in either open or closed loop circuits Wheel drives Track drives Winches ► Advantages of the LEDUC variable displacement motors 9 pistons designed for high starting torque and reduced pulsations at low speed Continuous variation in displacement from Vmax to Vmin (=0) High operating ratio (5 :1) Compact size, high weight-power ratio High speed and high operating pressure Low noise level: barrel driven by conical pistons Long service life: high performance bearings 3 choices of displacement control : see page 9 (HPA, H2N, E2N) ►...

Efficiency and operating conditions ► Efficiency of the MV, MVA, and MVSI motors Efficiency at 1/3 displacement N = 1000 rpm ISO46 fluid at 25°C (77°F) Efficiency (%) Efficiency at maximum displacement N = 1000 rpm ISO46 fluid at 25°C (77°F) 100 90 Volumetric efficiency (%) Global efficiency (%) Volumetric efficiency (%) Global efficiency (%) These graphs are given as an indication only; for further information, please contact our Technical Service. ►Preparation of the motor Bleeding of control device is done automatically during initial commissioning. ►The fluid LEDUC motors are designed...

Efficiency and operating conditions ►Direction of rotation The motors rotate clockwise or counter-clockwise depending on the direction of hydraulic flow entering the motor. Counter-clockwise rotation (CCW) ►Drain pressure It is essential to drain the motor, through T1 or to T2, to avoid excessive pressures on the shaft seal. Maximum acceptable internal pressure depends on shaft rotation speed. However, following these guidelines will avoid problems during operation: Maximum internal pressure (Int P) regardless of rotating speed (continuous): 4 bar. Maximum pressure regardless of rotating...

Order code To obtain the code for your motor, complete the different parameters 01 to 11 in the table on the left according to the options you require (see table below). Inlet ports Rear Automatic high pressure Suitable for use of speed sensor 08 With flushing valve

►Shaft - code ►Inlet ports - code Dimensions (in mm) are given only as an indication.

►Shaft - code 45 -0.5 ►Inlet ports - code flanges M0 Rear 1" 6000 psi SAE Dimensions (in mm) are given only as an indication.

45 -0.5 ►Inlet ports - code 05 flanges M0 Rear 1" 6000 psi SAE Dimensions (in mm) are given only as an indication.

45 -0.5 ►Inlet ports - code flanges M0 Rear 1" 6000 psi SAE Dimensions (in mm) are given only as an indication.

►Shaft - code Dimensions in inches (mm) are given only as an indication.

►Shaft - code ►Inlet ports - code 7/16 14UNC-2B depth 22 mm Dimensions in inches (mm) are given only as an indication.

Displacement control ►Displacement settings - code Automatic displacement control, high pressure HPA Two speed hydraulic adjustment of displacement: H2N Vmax The automatic displacement control, high pressure, automatically adjusts displacement as a function of the set pressure level. This can be set between 80 and 350 bar. Once set pressure has been reached, the motor starts changing displacement from Vmin to Vmax. Pressure remains stable, torque increases and speed decreases until Vmax is reached. Once Vmax has been reached, motor pressure can exceed set pressure if required. Vmax Maximum...

S P E E D S E N S O R & I N D I C AT O R O F D I R E C T I O N O F R O TAT I O N LEDUC CODE: 093327 Codes 08 MV, MVA, MVSI series motors can be fitted with an induction type speed sensor, to measure rotating speed and also direction of rotation. This accessory may only be used on motors which are suitably adapted to take it (see the order code system). Supply voltage Current consumption Output frequency Protection type Operating temperature Weight Cable length 5…32 V DC maximum 6 mA without load 0 Hz…20 kHz IP 69 k – 104°F…+ 257°F (– 40°C…+ 125°C) around 65 g 50 cm ►Technical data for the...

Installation & start up ►Maximizing service life of bearings In cases where there is a radial force on motor shaft, keeping the direction of that force within the shaded areas shown below will improve service life of the motor. Gear hub Motor in rotation CCW pressure in A Pulley hub Motor in rotation CW pressure in B Motor in rotation CW pressure in B Motor in rotation CCW pressure in A Motor capable of rotation CCW and CW ►Mounting position of motors LEDUC motors can be used in only mounting position. In ″shaft upwards″ position, make sure that the motor housing is completely filled with...

HYDRO LEDUC SAS au capital de 4 065 000 € EORI FR31902742100019