Electric lifting hoist is widely used in lifting heavy weights or installed on a single beam crane, linear, curve track. It can also be used to the hoist double beam, gantry crane and cantilever crane. It is a light equipment for lifting, which is popular in industrial and mining enterprising, railways, docks, warehouses etc. Ellsen Company, a famous lifting hoist manufacturer in China, supplies types of electrical hoists with competitive properties, such as compact structure, light weight, safe and reliable, easy operation and stable lifting. Ellsen electric hoists rank top in the hoist industry.
How does wire rope rotate on the drum?
Wire rope is an important part of lifting hoist, so it is vital to make sure the wire rope rotate on the drum in order, the item can perform well.
The way of rotation has two ways, monolayer and multilayer. For monolayer, it refers to the drum with rope groove, namely rope-guide. It benefits to arrange wire rope on the drum on order, avoid wire rope in mess. To prolong the service life of wire rope and rope-guide, we must strictly obey the rules of maintenance manual, not drag or lift in slide way. For multilayer, its important point is that the wire rope of first layer should rotate with pulling force. Avoid inner wire ropes loose, so that they are squeezed or pressed by the outer wire rope to groove and damaged.
Generally the tighter the wire rope pulls, the better it rotates. The advantage of multilayer is that it can save the hoist volume itself, reduce producing cost. It is more widely used for lifting height more than 30 meters.
Why choose Ellsen lifting hoists?
Ellsen lifting hoists have been exported to more than 50 countries and regions and won high praise from clients all over the world. Because lifting hoist from Ellsen has many strengths. It has high efficiency and low head room, and can make the most of space. Ellsen hoists are uniquely designed to have a shorter headroom than that of standard of common model configurations. What’s more, it has accurate orientation, highly-efficient operation, improved logistics efficiency. With light weight and reasonable structure, it is easy to operate and maintain.
With complete security protection devices, it is safe and reliable. Fire stopper can automatically alarm and stop lifting weights when the goods is overload. The rope guide can make the wire rope arrange on the sleeve neatly. The thick reinforcement wire rope is produced according to international standard, more solid and durable. In addition, modularized design, low failure rate, little repair cost, perfect after-sell service, are also Ellsen strong advantages.
Electric lifting hoist system
A hoist is used to lift or lower very heavy loads. In most applications a hoist is suspended overhead by a lug, a trolley or a hook. It can be permanently mounted in a fixed position using a lug or a hook, or it can be affixed to a trolley which travels on an overhead beam or rail. A trolley is used when the hoist is applied to move a load from one place to another.
Electric lifting hoists and trolleys are powered by electricity or air and come in different configurations and shapes to suit the specific requirements of the loads that need to be moved. Loads are suspended and moved up or down by a coil or link chain, a roller chain, a wire rope, or other materials used in specialized applications, such as high tensile fabric.
Overhead electric lifting hoist systems
Electric overhead hoists are used for applications that require fast and frequent lifting such as factory production lines. For repetitive lifts over long distances an electric lifting hoist and a motorized trolley are essential. Electric hoists and motorized trolleys come in a wide range of speeds and capacities.
An electric lifting hoist is similar in design to a mechanical hoist except that physical force, (applied to a lever or hand chain by an operator)is replaced by a controlled electric motor. Controls are used to start and stop the motor and to control its direction. These hoist and trolley motions are normally controlled from a push-button pendant station.
Electric lifting hoist systems are available in lug, hook or trolley suspensions that can be hand-geared, push type or motorized. The lifting medium can be roller or coil type chain or a wire rope. Wire rope hoists are used to attain faster speeds, higher capacities and smoother lifts.
The most popular chain hoists are coil or roller hoists for 3-ton or smaller sizes because they are generally lighter, smaller and less expensive to manufacture. Chain lifting hoists provide a true vertical lift, which means that the load will not vary from the hoist center line during lifting or lowering. However, wire rope units can be specially constructed to provide true vertical lift. Electric chain hoists come with either a four wheel motorized trolley or a six-wheel motorized trolley.
Parameters for overhead electric lifting hoists
When specifying overhead electric lifting hoists there are important parameters to consider, such as:
- Lifting height
- Frequency of lifts
- Speed of lifts
- Weight load
- Power supply
- Duty cycle
When choosing an electric hoist lifting system for a particular application, one of the most important things to consider is the duty cycle. A duty cycle can be defined as a specific number of operations at specified intervals. For an electric hoist application this means the amount of work the hoist is required to perform in a stated period of time. When determining the duty cycle capability of a specific electric hoist, the following play an important role:
- The lifting distance
- The load weight
- Frequency of operation
The duty cycle requirements have been classified by the Hoist Manufacturers Institute according to hoist class: H1, H2, H3, H4, H5. This information is used by most hoist manufacturers in a catalogue for customer use. In general, today all industrial grade electric lifting hoists on the U.S. market meet a minimum requirement of an H3 duty cycle.
Features of Ellsen electric lifting hoist
1. High efficiency, low repair rate
2. Advanced technology, dealer price, safety, low noise
2. Energy-saving, perfect performance, reliable properties
3. Low failure rate, stable travelling, smooth starting and stopping
4. High quality, factory price, perfect service
5. Safety-protection devices, low headroom
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