WOKAITE

Mainly because the  electrical wire rope hoist  is not connected to rated working voltage and can not work, generally have the following situations 1.The power supply system output to  electric wire rope hoist  control box or not, generally used test pencil to test. 2.The main control loop of the  electric rope hoist  control box is damaged, line disconnection or poor contact, or the line of the control button is bad, will also make the hoist motor no electricity. When this kind of circumstance appeared, need to maintenance the main control circuit and the control button. Maintenance, in order to prevent burning motor caused by main power supply and control circuit for three-phase motor lack of phase,  electric hoist motor  or hoist damaged by suddenly running, must disconnect hoist motor from the power supply circuit, only output to the main control circuit. After the control button on the line, press the start and stop switch, check the work condition of the electrical and wirin

1.The appearance of the  overhead EOT crane : comprehensively clean the appearance, no dust. Check for cracks, open welding. 2.Check and tighten transmission shaft seat, gear box, coupling, shaft and key is loose or not; check and adjust the brake wheel clearance to make it uniform, sensitive and reliable. 3.Check the  overhead crane  reducer mainly to see whether the oil leakage. If the box has abnormal sound when running, it is necessary to open the box cover to check. Generally due to bearing damage or gear meshing backlash is too large, tooth surface wear. 4.Lifting winch: check the wire rope and pulley hook is safe and reliable, if wear over the specified value should be replaced. Check and adjust the brake to make it safe, sensitive and reliable. 5.Inspection of steel wire rope for  double girder eot crane . Check the wire rope should focus on the observation of broken wires, wear, kink, corrosion etc., make a mark to some serious wear, broken wires but not exceed the standard po

Wire rope electric hoist  as a light small lifting equipment, widely used in various fields of national economy, while the development of China wire rope electric hoist in recent years is very slow. At the beginning of 1970s, China imported the TV type wire rope electric hoist from the Soviet Union, then we designed CD type  wire rope block  to replace the TV type wire rope electric hoist, so far CD type wire rope electric hoist has reached 30 years of history in manufacturing. In the meantime, there were some manufacturers to introduce foreign advanced manufacturing technology, but did not get a wide range of application. The development of  electrical wire rope hoist  technical level in the China is slow, the reason is many aspects of the: 1.China steel wire rope electric hoist production, manufacturing level and the supporting machinery, electrical and standard parts technology is low; 2.Over the past 20 years, the China economic system from the planned economy to the market ec

1.A new installed or after dismantling electric hoist, should first be empty test run several times. But before the installation is completed, do not do electricity test. 2.Should be carried out in the normal use of the rated load of 125%, up from the ground about 100 mm, 10 minutes of static load test, and check the  electric chain block  is normal or not. 3.Dynamic load test is based on the rated load weight, for repeated movements and move around the test. After the test, check the mechanical transmission part, electrical part and the connection part is normal and reliable. 4.Not allowed to use under the environment of absolute prohibition, or exceed the rated load and rated closing times per hour (120). 5.During installation and maintenance, must strictly check the limit device is flexible and reliable, when a hook rises to an upper limit position, the distance between the hook shell to the drum shell must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the ho

Electric chain hoist motor is the important part of the whole equipment, WOKAITE have today’s achievement in crane field, can’t be separated from selected materials and exacting standard, the following introduce you electric 1 ton chain motor selection standard. Ring chain hoist motor with class F insulation. When the elevation and the ambient air temperature is in conformity with the provisions, the motor winding temperature ceiling value of resistance should not exceed, the allowable bearing temperature (temperature) should not be more than the ring chain electric hoist lifting the rated load, when the terminal voltage of the 1 ton chain motor for rated voltage of the agencies can work normally, for conical rotor motor and disc brake motors and residual magnetic pull. When the three-phase power supply is in balance, the deviation of the average value of three-phase 1 ton chain motor no-load current of any one phase of three-phase should not exceeding three ring chain electric

Electric hoist with compact structure, electric hoist which motor axis is perpendicular to the drum axis adopts a worm gear transmission device. The disadvantage of large length and width, heavy mechanical structure, low efficiency, difficult processing. The hydraulic system is a double control, the overflow control valve and the magnetic contact pressure gauge can control the pressure accurately. Electrical control department adopts low voltage control, increase the safety of the control system, theree is no factory to produce this kind of structure type of products. Structure and features: the machine adopts the mechanical and electrical integration design, you can press different specifications of the steel wire rope by changing different mold, simple and safe control. The hoist motor  is parallel to the drum axis, and the electric wire rope hoist has the advantages of small height and length. The disadvantages are large size, poor grouping, complex manufacturing and assembly.