FOC TRANSMISSIONS, with the Motosuiveur®, provide you with an incomparable control of your motion loads. Based on a principle which is purely mechanical, the Motosuiveur® accompanies the rotation of the drum. It checks the uniformity of the load motions. He instantaneously brakes in case of failures.
PRINCIPLE
During the « follow-up » or monitoring phase (99 % of the life cycle), the mouse moves the spacer at the required speed and direction. As soon as the driver makes the vehicle move, the mouse follows and allows the motion. During the safety brake phase, for any inconsistency of the stagecoach motion in relation to the driver’s order, the wheels are going to touch the spacer and insure the safety function.
IMPLANTATION
The Motosuiveur® is connected to the drum and controlled by the duplicate of the command signals delivered to the motor of the winch and so accompanies the motion of the drum. A torque limiter placed between the motor and the reducer allows to size the main kinematics chain while providing more safety in case of overload or hang-up of the load.
CONSTRUCTION
The mechanical parts of the Motosuiveur® are locked with the drum. The small motor allows the motion. In normal operating mode, the motor rotation accompanies the drum rotation. For any drum rotation not ordered by the operator, there will be inconsistency of the drum/motor motions, causing the mechanical blocking of the system. The load motion is then instantaneously controlled without over speed, in a record distance.
PERFORMANCE
The Motosuiveur® provides many advantages : The collision hazard at high speed is almost null. Being permanently in « follow-up » mode, it instantaneously brakes in case of failures. The stopping distance is constant and about 30 mm. Because of its design (mechanical intrinsic safety), it is reliable and doesn’t require any electronic detection system to operate. The absence of wearing parts make it durable. Its maintenance is simple ; the system checking is also easy and the kinematic chain is not much mechanically stressed. The load lowering is safely done in all circumstances.
INNOVATION
The Motosuiveur®, which is the subject of an international patent, is the result of a design approach without contradiction between efficiency and safety. In our approach, we applied the design principles recommended by the « Safety of machines » regulation (Machines Guidelines 98/37 CE and associated standards). This product meets the requirement of the 954-1 standard « Safety of the machines » Category 4.
Determination of pressures and contact deformations.
Thermal analysis including the thermal deformations of the phase changes.
Study of elastoplastic deformations (ANSYS and 4D VISUAL NASTRAN softwares).
Determination of RAMS (Reliability, Availability, Maintenability and Safety)
FMEA Analysis of the systems (Failure Modes and effects analysis) :
Functional analysis.
Analysis of primary and secondary functions (environment diagrams).
Hazard analysis and determination of corrective actions.
FMEA analysis.
Reliability analysis (RELEX and SAPHIRE softwares).
Training about safety engineering.
Rapid prototyping technology
In order to better view your projects, we are able to achieve physical prototypes by Selective Laser Sintering (SLS, DTMSinterStation 200 Plus) or on CNC 5 axles made of aluminium or plastic, from unique part to virtual prototyping.
Determination of transmissions
Definition of gears geometry, such as :
External or internal cylindrical, spur or helical gear pairs
Bevel gearing or spiral bevel gearing.
Wheel and worm gears.
Crossed helical gears.
Planetary gears, gear box with differential, splines, racks.
Pre-proportioning calculation.
Optimization of the helix angle choice according to the application
Optimization of contact ratio.
Optimization of addendum modification coefficients.
Determination and curve trace of specific slipping.
Determination of coupling profile (trochoid, involute).
2D representation of gearing (interfaces CAO DXF, DWG, BMP).
Verifications under stresses such as :
Contact stiffness.
Well balanced root and flank strength.
Seizing strength.
Wear resistance.
Graphic representation of flash temperature evolution.
Determination of gear efficiency.
Verification of thermal resistance.
Determination of transmission errors.
Determination of resonance frequencies.
Measurement against gear damages.
According to the worldwide standards such as : ISO 6336, DIN 3490, AGMA 2001, BS 721, ISO 14521, ISO 10300, DIN 3991, VDI, AFNOR 23015, HENRIOT 75. Determination, calculation and design of your power transmissions according all kind of specifications :
F.E.M : Fédération européenne de manutention.
C.S.T. EDF (Cahiers des Spécifications Techniques) et C.R.T EDF (Cahiers des règles Techniques)
K.T.A. (Safety standards of the nuclear safety standards commission)
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