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Vibrating Conveyors

Vibratory conveyors as a seperator force

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Vibratory conveyors

Vibratory conveyors use an angular pitch along with a controlled throw distance from the neutral rest position to propel product forward in the conveyor trough. The pitch of this action as well as the throw distance can be designed to suit a variety of applications.

Vibratory are used for stratifying products for screening applications, classification of products by size, fluidizing products for either drying or cooling applications, spreading products for uniform distribution transfer applications from different sized process outlets to downstream inlets, removing excess moisture from products, promoting leveling in product packing vessels, elevating products between process points or just general point to point conveying.

Feeders

The simplest of the vibrating conveyors is the feeder style:  a brute force style conveyor that does not require tuning and has virtually no external moving parts. Triple/S Dynamics offers a line of brute force style vibratory feeders for both sanitary and industrial applications.

General uses are for controlled feeding from a storage vessel mounted above the unit and trough lengths are typically 12 feet or less. Trough widths can range from 4 inches wide to several feet wide. Sizes are determined for each specific application.

This type of vibratory conveyor uses dual eccentric motors attached to a conveying trough. These motors are attached to the trough at a determined pitch angle and in parallel to allow only allow trough motion in the conveying direction. The troughs are supported using coil spring isolators to reduce any vibration transmission into the supports for the conveyor.

Using a variable frequency drive to adjust the speed of the eccentric motors, the velocity of the product flowing through the conveyor trough can be controlled to meter the amount of product that is fed to the next destination. The desired maximum throw of the conveyor can be adjusted by setting the eccentric weight force on the motors. This offers the user the ability to control the feed rate from overhead bins or hoppers into their process line. Flow rates can be adjusted from 0 to 60 plus feet per minute by either manual or automated motor control.

The simplicity of construction and operation make these conveyors not only safe, dependable, and economical, but extremely sanitary as well. Minimal cracks and crevices to harbor dirt as well as open construction methods for ease of cleaning. Typical sealed exciter motors are lubed for life. Units only require a periodic inspection to make sure they are operating within design specifications.

Pan materials can range from stainless steel sheet metal to heavy abrasion resistant carbon steel plate construction for abrasive demanding applications. We also offer a wide range of trough configurations for your specific application. From converging your products into a narrower process line or spreading them out over a wider process line, we can help you achieve your goals. This style of conveyor can also be configured into a shaking table configuration for leveling out product in containers prior to sealing.

These brute force feeder style conveyors are supported using coil spring isolators to reduce any residual vibration into the surrounding support structure. They can be suspended from above or below depending upon your unique requirements. They can also be declined or inclined to meet your production goals.

Unbalanced

Unbalanced vibrating conveyors are a near resonant frequency style conveyor that are classified as being earth anchored. This means that the conveyor is required to be mounted securely to a robust structure, typically a customer’s concrete slab of adequate thickness that can absorb the reaction forces that are created from the dynamic motion of the conveyor trough.

The trough is mounted to the anchored frame using a number of springs, typically fiberglass or coil, and driven using a belt driven, shaft mounted eccentric drive connection to the conveyor trough. Conveyors are tuned with the number of springs to run at a specific speed and the eccentric drive connection controls the amount of throw. An elastomeric coupling between the eccentric and the trough help to reduce the power requirements to run the conveyor as well as protect the trough connection from excessive stresses that could induce failure.

Unbalanced vibratory conveyors can be in excess of 100 feet in length if adequate mounting structure is available. These units are useful for screening, classifying, fluidizing and de-watering.

Maintenance requirements on this type of conveyor are periodic bearing lubrication, belt inspection and overall unit inspection.

Unbalanced vibratory conveyors are typically used for industrial applications.

Base Balanced

Base balanced vibrating conveyors are a near resonant frequency style conveyor that have a greater mass frame that is isolated from the customer’s main support structure. This allows the conveyor to be mounted on less robust structures than the unbalanced type. The heavier frame dampens the reaction forces that are created from the dynamic motion of the conveyor trough. The reduced motion of the conveyor frame is then isolated from the surrounding structure.

The trough is mounted to the frame using a number of springs, typically fiberglass or coil, and driven using a belt driven, shaft mounted eccentric drive connection to the conveyor trough. Conveyors are tuned with the number of springs to run at a specific speed and the eccentric drive connection controls the amount of throw. An elastomeric coupling between the eccentric and the trough help to reduce the power requirements to run the conveyor as well as protect the trough connection from excessive stresses that could induce failure.

Base balanced vibratory conveyors are generally limited to about 40 feet in length due to frame resonant frequencies in greater lengths. These units are useful for screening, classifying, fluidizing and de-watering.

Maintenance requirements on this type of conveyor are periodic bearing lubrication, belt inspection and overall unit inspection.

Base balanced vibratory conveyors are used for both sanitary and industrial applications.

Excited Base

In excited base vibratory conveyor, there is no direct physical connection between the conveyor drive and the pan. Pan motion is created as a result of inducing a small controlled vibration into the base frame near resonant frequency of the pan support spring system. This vibration causes the conveyor pan to move the designed distance (or stroke) required for the application. This creates a low energy (or horsepower) requirement for operation. This also removes any adverse forces from being induced into the conveyor pan in a localized area. The forces are dispersed equally over the length of the conveyor pan and the low stress levels reduce the likelihood of any pan fractures occurring. The small amount of frame vibration is easily isolated from the surrounding support structure.

Excited base vibratory conveyors are generally limited to about 30 feet in length due to frame resonant frequencies in greater lengths. These units are useful for screening, classifying, fluidizing and de-watering.

Power requirements to operate this style of conveyor are low (most under 1 horsepower total). The noise level of these conveyors operating is extremely low

The removal of the physical drive connection at the conveyor pan also removes the requirement for external bearings, belts, connectors and guarding requirements as well. This greatly reduces the amount of maintenance required. The motors are mostly sealed for life and require no periodic lubrications. This also creates a more sanitary environment for you processing lines. All that is required is periodic visual inspections to ensure the equipment is operating within the appropriate design guidelines.

Excited base vibratory conveyors are used for both sanitary and industrial applications.

 

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