Category: Vibrating Conveyor

Oscillating Conveyor System | Vibratory Oscillating System | Vibrating Conveyor Applications

Oscillating Conveyor System

In this post, we focus on the vibrating/oscillating conveyor systems and their categories, designs and applications. Manufacturers can transfer material from one area to another and fulfil the task in a number of different ways. Conveyor Transportation technology has been designed for moving various types of goods, whether they solid, semisolid or sometimes liquid, and a number of conveyor systems are available to suit these requirements. This article is designed to help people concerned with conveyors determine whether the vibrating / oscillating conveyor meets their requirements and help customers learn their alternatives.

Selection of vibrating/oscillating conveyor:

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The oscillating motion of the trough is achieved via specially designed inclined arms and an eccentric shaft driven by a motor through V-belts. The eccentric shaft is mounted on anti friction bearings and has V-pulleys at both ends with weights on them to counteract the unbalancing force. The rotation of the eccentric shaft provides a forward and backward motion to a connecting arm attached to the trough through a rubberized pin.

The trough motion is predominantly horizontal with some vertical component, which causes it to oscillate with a pattern conductive to conveying material. A retaining spring assembly at the back of the trough absorbs shock load. All components including drive motor are mounted on a rigidly constructed base frame.

Types of Vibrating / Oscillating Conveyor system

In vibrating conveyors there are three major drive mechanisms: cranks/springs, weights revolving, and electromagnets. Crank or spring-type conveyors are turned by a motor has a four bar mechanism, which transmit an elastic force causing sinusoidal movement. The very same objective are achieved by revolving weights and electromagnets, but by rotating eccentric weights and rotating magnetic fields respectively. The benefits of any one drive mechanism over another are quite varied since they are all shown to be successful and depend greatly on the application conditions and the working environment.

Difference between Vibrating Conveyor vs Oscillating Conveyor

Oscillating conveyors are often referred to as a particular form of vibrating conveyor when they work with a relatively low frequency and a greater range of motion than would be normally used with a vibration conveyor. This means that oscillating conveyor systems are utilised for the transmission of bulk commodities such as in the wood or waste management/recycling industries. These conveyors, for instance, can be used to carry wooden scraps upstream and transfer them to an outlet.

In contrast to vibrating conveyors operating at lower amplitudes and higher frequencies, the flow or transportation of the substance is softer with a vibrating conveyor than with a oscillating conveyor. Oscillating conveyors are often known as jump conveyors or grass hopper conveyors in hard rock mining applications.

Advantages of Oscillating Conveyor System:

· Hot and abrasive materials can be handled

· Cooling, drying and dewatering operation can be done during transport

· Scalping, screening or picking can be done

· Units can be covered and made dust tight

· Simple construction and low head room

· Can be made leak proof

Disadvantages of Oscillating Conveyor System:

· Relatively short length of conveying ( about 50 m Maximum)

· Limited capacity, about 350 tons per hour for length of conveying of 30 m.

· Some degradation of material takes place.

Applications of Oscillating Conveyor System:

  • Vibratory conveyors find wide spread application in the transportation of dusty, hot, toxic, and chemically aggressive bulk material through a closed trough or pipe in chemical, metallurgical, mining industries and manufacturing of building materials.
  • Vibratory conveyors are also employed for transportation of steel chips in machine shop, hot knocked out sand, wastes and small castings in foundry shop. Vibratory feeders are also in use for delivery of small machine parts like screws, rivets etc.
  • Sticky materials like wet clay or sand are unsuitable for vibratory conveyors. In handling finely pulverized materials, like cement etc., the performance of such conveyors are reported to be poor.
  • Vibratory conveyors are hardly employed for handling common bulk loads, such as sand, gravel, coal etc as the same can be done more efficiency by belt conveyors.

Vibrating Conveyor | Oscillating Conveyor | 5 Tips To Understand The Background Of Vibrating Conveyor Parts Now | Vibrating Conveyor Components

Vibrating conveyor / Oscillating Conveyor

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A vibrating conveyor essentially consists of an open or closed trough or pipe, generally horizontal but not always so, and which is elastically supported on a base structure or suspended from an overhead structure by springs. The trough or pipe is caused to oscillate at high frequency and small amplitude by an appropriate drive mechanism.

Vibrating conveyors are commonly employed in industry to carry a wide variety of particulate and granular types of bulk materials. The fundamental action of the vibrating troughs on the bulk material loaded on it is to throw the particles upward in the forward direction so that the material performs series of short hopping movement and propagates at a certain speed.

Oscillating conveyors are utilized to convey sand or other granular particles at a desired rate. The conveyor is generally placed under a vibrating shakeout or a grid to eliminate direct handling of hot sand by the belt conveyor. In the process of reciprocation, the oscillating conveyor cools the hot sand to some extent which increases the life of the return sand conveyor belt.

An important characteristic of vibrating conveyor is the ease with which the flow rate of the conveyed material can be controlled by adjusting the amplitude and or frequency of the vibration. This particular aspects of such conveyor has led to the wide spread application of vibrating trough as feeders employed to supply material in controlled amount to various machines. When the trough is replaced by a screen, the vibratory conveyor may serve as vibrating screen, which has wide application in various industries.

A distinction must be made between feeders and conveyors. A feeder is used as a discharge device under a storage hopper or bin and is subjected to varying head loads. A conveyor requires regulated feed rate and must not operate under varying head load conditions.

Construction details of Vibrating Conveyor / Oscillating Conveyor:

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The conveying fabrication can take the form of open and enclosed troughs as well as tubular designs typically to a maximum length of 5 meters long, per single conveyor. The equipment can be manufactured in carbon steel and some applications which required hygienic applications such as food and pharmaceutical can be constructed in stainless steel.

Troughs can be lined with a various materials to protect from abrasion and aid the transfer of material – suited to their application. For example, when handling rock or metal scrap, the conveyor can be lined with abrasion resistant steel, or when handling foundry moulding sands or recycled waste the conveyor can be lined with plastics and rubber.

Motor drive conveyors provide high volume feeding and efficient product conveying with high throughput rates. Motor drives are generally used when the rate of discharge does not need to be adjusted or when feed the required feed is infrequently on and off.

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Vibrating conveyor inbalanced motor

 

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Vibrating conveyor compression springs

Applications of Vibrating Conveyor

  1. Transporting food grains or ingredients to product line
  2. Conveying powders and chemicals between processes and equipment
  3. Removing foundry sands from beneath shakeouts
  4. Conveying chipping, shredding and recycled materials

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Advantages of Vibrating Conveyor

  1. Possibility of conveying materials up to 45 m
  2. Vibrating conveyor unit widths from 6 inches to 10 feet, and lengths up to 400 feet
  3. Heavy duty vibrating conveyor designs feature rugged coil spring construction with rocker arm stabilizers
  4. Gentle handling of fragile products
  5. Capacity of conveying different kind of materials without having them mixed
  6. High temperature conveyors available for handling materials up to 2000 deg Fahrenheit
  7. Possibility of performing different processes besides conveying such as classification of products, heating, cooling, de-watering etc.
  8. Possibility of automating processes to extract the product previously conveyed in different points of the equipment
  9. Natural frequency design for low stresses and long life
  10. Continuous structural steel base along length of conveyor
  11. Few moving parts, easy cleanable surfaces, minimum maintenance
  12. Balanced / Isolated units allow mounting in upper structure due to reduced reactions
  13. Polished trough and special coatings available for sticky products
  14. Easy replaceable liners and wear surfaces available
  15. Dust tight construction for safety and comfort available
  16. Manual or automatic bypass gates available
  17. Leak proof troughs eliminate spillage
  18. Quiet operation, low operating costs, energy efficient