Views:13 Author:hengyuancrane Publish Time: 05-03-2020 Origin:Site
The electric hoist has full speed control, and the operator can fully control the lifting speed. Electronic shifting technology eliminates the effects of positioning the workpiece and eliminates downtime. The lower speed allows the workpiece to be lowered slowly for a soft stop, thereby extending the life of the gear train components, load chain hooks and brake components. Weight overload protection prevents lifting above the rated lifting capacity. Thermal overload protection prevents the motor from overheating at low voltages.
Electric hoists affect their working life in many ways, including design, production, use and maintenance. Due to the higher price, minimizing the number of replacements and repairs can effectively save costs and reduce losses in many ways.
The electric hoist is reasonably designed to meet specific conditions. It meets different requirements in terms of lifting weight, lifting height, power and voltage, etc. It is easy to operate, improves work efficiency and extends service life. Utilizing new materials, while ensuring product durability, strict control of raw materials, processes, quality inspection and other processes to prevent unqualified electric hoists from entering the market. Install and use according to working conditions, maintenance and repair are in place, use special specifications electric hoist for special conditions.
In the process of using electric hoist, various abnormal situations often exist. Usually, someone who knows a little bit will rule out which component is faulty based on sound and malfunction. Failures include failures of the reducer and brake. Let me introduce you specifically. Common accidents of the reducer include leakage of parts and local heat of parts.
The oil leakage was mainly caused by the deformation of the box, the failure of the sealing gasket, the smooth contour, and the tightness of the bolts. In the oil leakage part, including the surface layer connecting the bearing end cover and the housing, for various reasons, the bolt can be appropriately strengthened or replaced by a washer.
The local heat of the reducer is mainly caused by bearing damage, journal jamming, and system tooth damage. Lubricant is indeed added and added. If the gearbox is hot, determine the housing of the reducer, especially the bearings. If the whole is hot, it is because a lot of oil has been added, and the holes in the reducer should be checked to release excess oil. If the bearing is hot, the oil level should be opened to identify the bolt holes and check for escaping oil. If there is not a large amount of oil flowing out, the total amount is appropriate.
Common brake failures include brake failures and large total slip. Typically, the spacing of the brake fittings usually exceeds 80 mm. Inspect the joint surface and find excessive wear. In this case, the screws of the brake can be released and the fan gear can be removed. Remove oily stains from the surface, and adjust the nut slightly to obtain a more suitable distance. If the spring is prone to fatigue, it should be replaced. If the brake ring is damaged, it is difficult to ensure the interval and replace the brake ring. Replace the internal accessories and apply a small amount of water to the added brake ring for a smooth installation. Another type of failure is when the brake is difficult to open when the electric hoist is activated. This is because the setting interval is small or the back cover is rusted. At this point, you can fine-tune the nuts to lock them, add space to each other, or remove the back cover and continue cleaning.
After using the electric hoist for a period of time, the gears will wear out. What are the factors that cause the wear? Another form of failure of the drive gear on electric hoists is wear and tear, and the teeth become thinner after wear. If wear is caused by impurities in the lubricating oil, it is often referred to as wear. This wear usually has deep scraping at the top and root of the teeth, which is perpendicular to the pitch line and parallel to each other. After the scraping path occurs, the oil temperature in the reducer rises and the gear transmission makes a slight noise. In this case, the lubricant must be replaced.
Due to the deviation of the tooth shape of the electric hoist and the deviation of the installation center distance, the edge of the gear tooth tip and the transition curve portion of the root may be excessively squeezed, so that the root radius of the tooth root is seriously worn. Due to the overload, the root of the driving wheel or the top of the driven wheel (sometimes the entire tooth surface) is often worn by a thin layer.