Hoisting hoist failure and repair
The winch hoist is one of the important components of the sluice project. Scientific use and maintenance are directly related to the performance of the project, and the maintenance measures are directly related to the safety and quality of the project, and the normal operation of important components such as the hoist It is especially important. In order to ensure the complete and safe operation of the hoist equipment, free operation and long service life, maintenance and repair work must be done frequently. When running maintenance maintenance, attention should be paid to routine maintenance. Once the hoist equipment defects and hidden dangers are found, make small Bad repairs, follow-up repairs, prevent the expansion of defects and disease, and adhere to the principle of “maintenance, weight maintenance, repair and robbing†for maintenance and repair.
I. Fault diagnosis and maintenance of the winch type hoist motor
The hoist motor of the winch type hoist is a key component of the opening and closing equipment. When it is running or faulty, it can prevent and eliminate faults in time by watching, listening, smelling and touching four ways to ensure the safe operation of the motor.
1. The motor runs normally, but when it stops suddenly, it will see sparks in the loose connection. It may be that the fuse is blown or a part is stuck. Immediately disconnect the power supply and find out the reason to clean the jamming part and replace the fuse.
2. If the motor of the hoisting hoist is violently vibrated, it may be that the motor is not properly fixed, the foot bolt is loose, etc., and the loose parts are tightened in time.
3. When the motor is running normally, it should emit a uniform and lighter "click" sound, no noise and other special sounds. If the noise is too large, including electromagnetic noise, bearing noise, ventilation noise, mechanical friction sound, etc., it may be a malfunction or a fault phenomenon. It is necessary to stop immediately to find out the cause: First, for the winch hoist bearing noise, it should be The motor is often monitored during operation. The monitoring method is: the end of the screwdriver is placed against the bearing installation part, and the other end is close to the ear, and the bearing running sound can be heard. If the bearing is running normally, its sound is continuous and small "sand" sound, there will be no change in height and friction and metal friction. If there is a "beep" sound, this is the metal friction sound, which is generally caused by the lack of oil in the bearing. The bearing should be disassembled and filled with a proper amount of grease. If there is a "beep" sound, this is the sound produced when the ball rotates. If the grease is dry or lacking oil, it can be filled with proper amount of grease. If there is a "snake" or "click" sound, it will produce the sound of irregular movement of the ball inside the bearing. This is the ball damage in the bearing or the motor is long-term. No, the grease is dry; second, the winch hoist if the transmission mechanism and the transmission mechanism emit continuous, not high, low-pitched sound, may be loose coupling between the coupling or pulley and the shaft and the key or keyway wear Cause, need to stop the inspection in time, and wear out in a timely manner if the wear is serious. After the various couplings are overhauled, the positive and negative rotation of the person should be used to make it feel easy and flexible. For flexible couplings with cylindrical pins, the tightness of the pin with the elastic pin and the back wheel should be carefully checked during installation. The maximum lateral clearance should not exceed 0.05 mm, and the elastic pin should be aged or damaged. Should be replaced, gear couplings should be filled with lubricant as required.
During the daily work of the hoisting hoist, keep the motor casing free of dust and dirt, so as to facilitate heat dissipation. Always check the connection box for the looseness of the pressure line bolts, burn, check the bearing grease condition before starting the machine, and keep the oil filling bearing cavity. 1/3-2/3, replace unqualified lubricating oil in time, measure the insulation resistance of the motor at least once a year with a shaker. If it is less than 0.5MΩ, it means that the coil is damp, it needs to be dried, general drying Temperature is about 100
°C, drying time is above 20h.
Second, the failure and maintenance of the winch hoist oil
The oil of the hoisting hoist in the liquid state constitutes the operating medium of the whole system of the hoisting hoist, which can transmit the energy of the hoist, convert this energy, and integrate the control hoist system. At the same time, the oil can also prevent the corrosion of the gate and maintain the smooth state of the opening and closing facilities. However, if this type of oil is contaminated by the hoist and it is difficult to highlight the performance of the maintenance, it needs to be replaced in time. Maintaining the cleanliness of the oil through the maintenance of the hoist on weekdays constitutes the focus of the protection of the hoist.
First of all, it is necessary to filter the lubricated solution of the hoisting hoist often to avoid the oil body from being contaminated by the hoist. The value of the survey indicates that the small particle state material contained in the oil can cause some wear of the machine parts, resulting in the opening and closing effect of such a component missing. Therefore, in addition to the need to maintain a properly accurate, well-constructed filtration facility, the filter cartridge contained in the filter should be periodically washed off to ensure that the fitting can constrain the solids in the lubricant. After the gate type hoist has been used for a long period of time, it is necessary to adopt a comprehensive attribute hoist filter countermeasure to repair the filter at the damaged position.
Secondly, it is necessary to maintain the cleanliness of the hoisting machine oil from multiple angles. If the winch type machine is not started frequently, place the machine in a dry space. If it is necessary to be placed outdoors, then choose a flat place, attach the board to it, and cover it with a curtain. If you need to keep the hoist for a long period of time, you should maintain the hoisting machine, repair the worn parts, and thoroughly clean the machine to protect the excellent machine attributes. When deciding on the order in which the facilities are placed, it is necessary to ensure that all the facilities of the hoisting hoist can be flexibly accessed. Set the oil rod included in the machine to the direction of idle speed; set the lever used for operation to the neutral position.
Third, the failure and maintenance of the winch hoist brake
Brake (brake) is one of the important components of the winch hoist. It can brake the brake wheel immediately when the hoist stops running, so that the gate stops moving, so the action is required to be flexible and the brake is accurate. If the gate is found to settle automatically, the brake should be thoroughly inspected and repaired immediately.
1. The brake wheel and brake pad surface of the brake should not contain any oil, paint and moisture. The contact between the brake shoe and the surface should reach more than 70% of the total area. The brake wheel has cracks, blisters and other defects. Renovation or replacement. The brake band is seriously worn and should be replaced; the rivet or rivet of the brake band is broken or detached, and should be replaced.
2, the electromagnetic coil should be tested according to the use of the periodic insulation, if not required, can be baked, armature and brake lever, joint hinge shaft should always be oiled and maintained to ensure flexibility and flexibility.
3. The main spring of the brake should be greased and maintained. Regularly replace the new oil so that it does not rust. The main spring is deformed and should be replaced when the elasticity is lost.
4. The brake release stroke, clutch clutch stroke, safety limit switch limit stroke and gate opening and closing position indication stroke should be adjusted in time.
4. Fault and maintenance of the wire rope of the winch type hoist
If the wire rope is deformed or broken, it must be replaced in time when the scrapping standard specified in the “Code for Inspection and Disposal of Wire Rope for Lifting Machinery†(GB5972-86). When the wire rope is replaced, the number of pre-wounds wound on the reel is greater than 4 laps, 2 of which are for fixed use and 2 for safety.
5. Matters concerning the maintenance process of the winch hoist
It is necessary to preset the time limit for repairing the hoist hoist, frequently check, regular maintenance, and focus on the usual repair procedures. For the routine maintenance of the hoist system, it is necessary to ensure that the system should be used effectively, reduce the worn and necessary parts, and protect the smooth operation of the hoist parts. For those hoist problems that are often used, it is necessary to repair them at any time, adopt local hoist adjustment measures, and maintain the clean attributes and flexible performance of the embedded components. Therefore, in order to repair the usual faults, it is necessary to build on the concept of prevention and control hoist accidents, and to standardize the practical steps of repair and inspection. Maintenance personnel should clarify the related technical materials of the hoist, adopt comprehensive maintenance measures, and introduce feasible test methods to carry out comprehensive operational review activities. According to the accumulated hoist maintenance experience, record the detailed faults of the hoist parts and resolve them.
Hp Probook Series,Hp Probook Lcd Back Cover,Palmrest Keyboard,Back Cover
S-yuan Electronic Technology Limited , https://www.syuanelectronic.com