Magnetorheological cable drive braking system and control method thereof
A braking system and magnetorheological technology, which are applied to elevators, lifts, hoisting devices in buildings, etc., can solve the problems of short buffer stroke of hydraulic buffers, motor burnout, rebound, etc., and achieve convenient switching control, material Low loss effect
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Embodiment 1
[0028] see Figure 1-3 , a cable-driven braking system based on magnetorheology, including a base 1 and a controller 2, a motor and a braking mechanism are fixed on the base 1; the braking mechanism includes a chassis 3 fixed on the base 1, the chassis 3 is a hollow structure, The inner cavity of the casing 3 is provided with a movable piece 4 and a reciprocating screw 5 that drives the movement of the movable piece 4. The two ends of the reciprocating screw 5 pass through the casing 3 respectively, and the output shaft of the motor is connected with one end of the reciprocating screw 5. The other end is coaxially fixedly connected with a reel 6, and the reel 6 is wound with a cable 7; the movable piece 4 is provided with a guide hole and a perforation in the middle, and the movable piece 4 is sleeved on the outer wall of the reciprocating screw 5 through the perforation, and the movable piece 4 The perforated inner wall is provided with a force transmission block 8 that match...
Embodiment 2
[0034] see Figure 1-4 , a control method for a cable-driven braking system based on magnetorheology, comprising the following steps:
[0035] S1, preset the reel 6 rotational speed threshold of the controller 2;
[0036] S2, start the motor to drive the reel 6 to rotate, control the retraction of the cable 7, the speed measuring mechanism measures the reel 6 speed in real time, and transmits the measurement signal to the controller 2; Do reciprocating motion in the chassis 3 under the joint action;
[0037] S2. When the speed of the reel 6 measured by the speed measuring mechanism is too fast and exceeds the set threshold, the controller 2 turns on the electromagnetic coil 10 to energize the electromagnetic coil 10 and generate a magnetic field;
[0038]S4. The viscosity of the magnetorheological fluid 11 in the chassis 3 increases under the action of the magnetic field, and the resistance of the movable piece 4 to reciprocate in the chassis 3 increases, so that the speed o...
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