Descriptions of domestic wire rope hoist future direction of development

    (1) Series is designed to rationalize.
    Recommended Specifications: Capacity from 0.25-80t, lifting height 6-63m, with fewer base model covering the entire series. Lifting speed diversification Recommended values: single speed 8m/min, 10m/rain, 12.5m/min; dual-speed 1/10, 1/3, 1/4 ratio change. Two-speed programs should take picture machine, double windings and pole type, or using frequency conversion stepless speed technologies. Design reference GB3811-1983 " overhead bridge crane  design specifications" working-level division, working-level coverage will be expanded to M3-M6.
    (2) structure should be able to meet a variety of working conditions
    Such as: low headroom, twin-lift and other mounting methods; may be remotely controlled, insulated, corrosion proof, high temperature heat, explosion and other features of the product.
    (3) Shape Design
    Change the traditional circular design, a square structure, the modular design, increasing the versatility of components, from the original arrangement of the motor of an intermediate shaft in the form of a gear of the rolls, the rolls instead of motor-reducer The arrangement not only conducive to effectively improve electric hoist lifting height, and avoid high-speed shaft axis drive, can improve the smooth running and reliability, reduce manufacturing costs. Increase the magnification range of pulleys, improve range of stand-alone use.
    (4) using high-quality high-strength steel wire rope
    According to GB3811-1983 standard, to meet the safety factor of the tensile strength of the premise, to minimize the wire diameter, the use of roll diameter adapted to the diameter of the rope and pulley ratio to the ratio of the diameter of wire diameter in order to facilitate the entire narrow machine structure and weight.
    (5) Optimized gear designed to enhance the carrying capacity of the gear.
    Gear can be 40Cr or 42CrMn, 40MnB material,overhead gantry crane quenched and hardened or nitrided, the original material used 20CrMnTi or 20MnTiB Although the flexural strength of the gear and the contact strength than ideal, but affected by domestic processing level based, gear low precision, carburizing quenching deformation difficult to control, after the sequence nor grinding process, it is inevitable there is gear noise, low efficiency. New materials and heat treatment method has many domestic manufacturers to promote. In addition, the use of hardened and hardened gear meshing pairs, using high-level gear shaving process, election gear helix angle of about 12 ~, which are geared to improve stability and effective way. Gear box, cover design should be conducive to the absorption of noise and vibration damping, transmission bearings should improve accuracy levels.
    (6) Motor
    Using 2,4,6-pole conical rotor motor for a variety of different conditions. Motor insulation class F class and should be raised to 11, protection class increased to IP54; motor overheat protection device settings; motor should be designed effectively improve the useful power, buck ability and starting and braking capabilities; improve motor design temperature, give full play to the potential of the motor; motor noise in addition to the design, processing, manufacturing to improve accuracy, it should also be considered from the design to reduce electromagnetic noise and wind noise channel eddy current measures. Motor design should follow the principle of classification level work, improve stand-alone use purposes.
    (7) Electrical protective measures to increase
    In addition to the upper and lower limit protection, it should also increase the overload protection (individual cases considered underrun protection); wrong phase, phase, voltage protection; hook retaining rope protection. Development of multi-function models such as brake: Dual brake (brake wheel motor brake + high cone axis compensation braking); three brake (brake wheel brake cone axis compensation brake + + high volume cylinder safety gates). According to user needs increased lifting height, load digital display o
    (8) high wear resistance, high strength rope guide rope guide materials and equipment performance has been the lead rope hoist many domestic enterprises to explore the subject, at present,hoist gantry crane China has mastered the part of the successful experience o
    (9) Other components such as hooks, trolleys and other design into groups to consider and versatility.
    (10) to improve matching pieces such as wire rope, bearings and other standard parts quality.
    (11) to improve contactors, transformers and other electrical control components of the mechanical life and electrical life, electric control box shape design plug body should consider coordinating with gourds.
    (12) focus on the whole of paints, packaging appearance quality.