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Whether the cable or the cable collection, the guide rope pulley cable to storage drum rim, guide contact the rope pulley can trigger the stroke switch 1, stop the guide rope pulley to keep moving forward, when the cable to start a new layer in the flange side, cable and rope guiding wheel in the return direction row cable angle alpha, a travel switch 2 trigger, guiding wheel moving in opposite directions, such measures can protect the safety of the equipment.
When the cable between the ring and the ring transition, the system should rotate speed can adjust the storage drum, to adjust the traction cable between the drum and the storage drum length, so that the cable tension is maintained within a range, in order to avoid traction between the drum and the storage drum cable too loose or too tight. At the same time, in order to avoid cable between the same position layer and layer stacking cable arrangement, but also a timely driving cable arrangement screw rotation to eliminate the rope angle. If the torque characteristics and response time transmission and control system can not meet the requirements, the cable, the cable between the storage drum and drum may tension is too large, the cable tension too small cable chaos, this is very common in practical applications, will affect the work efficiency and the service life to reduce the steel cable and drum.
3.3 Analysis of hydraulic system of cable line angle
Rectangular spooling device mainly comprises a hydraulic system cable guide wheel screw mechanical parts and the quantitative hydraulic pump and motor support cylinder etc., can reduce the cable arrangement angle storage drum on, automatically adjust the cable guide wheel vertical position to adapt to the cable in the storage drum on the rope wrapped around the radius.
Reducing rope is made from the point in Fig. 1 limit switch 1 and switch controlled by 2, when the cable arrangement angle steel cable in a ring rope track in the storage drum on, travel switch 2 is switched on, the spooling device motor, adjust the cable guide wheel position, thereby reducing the rope angle it is used for mechanical transmission, high precision ball screw, linear motion, especially without clearance compensation in frequent commutation.
Cable guide wheel vertical position adjustment as shown in Figure 5, the dotted line represents the layer changing front cable position, when the cable guide wheel out cable direction and cable in the storage drum on the rope wrapped around the radius tangent, no force between the wheel and the guide cable cable, because the cable layer in the storage drum. Rope wrapped around the radius increases (Figure 5), a force F is generated between the cable and cable guide pulley, cable guide wheel on the support under the action of the oil cylinder to automatically adjust the position, so that the cable guide wheel of the mooring rope wrapped around the radius direction and the tangent, cable and cable guide wheel without mutual interaction.
Position adjusting cable guide wheel vertical direction by the control mode of hydraulic, hydraulic schematic diagram is shown in Figure 6, figure is a quantitative hydraulic pump output pressure, is the output pressure reducing valve, is the support cylinder by the cable guide wheel force, where is the cable guide wheel weight force on the support cylinder, is a steel cable on cable guide wheel force through the cable guiding wheel to support the valve output pressure oil cylinder through setting, supporting force of a cylinder cavity is and equilibrium in Figure 5 of the state, the cable wrapped around the radius of cable guide wheel, steel cable to the force the piston moves up, then, decreases, hydraulic pump to support cylinder cavity fill oil so that the pressure to maintain stability, when the cable guide wheel of the mooring rope wrapped around the tangent direction and radius, is equal to zero, the hydraulic cylinder force and equilibrium, cable guide wheel stops on the move.If it is in the cable, cable will have a downward force on the cable guide wheel, the piston moves down, thepressure, pressure relief valve overflow, the remained stable until the cable guide wheel, the mooring rope wrapped around the tangent direction and radius, the supporting force of hydraulic cylinder and cylinder rod stress balanced state, cable guide wheel stopped moving..