Product Description
Brief Introduction
GX tubular screw conveyor is bulk material handling equipment, which usually consists of a tube containing either a spiral blade coiled around a shaft (sometimes called an auger), driven at 1 end and held at the other. The main parts include tube, shaft with spiral blades, inlet and outlet chutes, as well as driving device.
The closed pipe-type screw conveyor is a pipe with a shaft inside with welded screw blades and passive bearing. The screw’s blades have different pitch which depends on the type of the transported raw material and the planned capacity. This type of conveyor is closed, which means that the screw cannot be accessed directly. Due to the closed structure, the transported raw material does not spill outside the machine during transport.
The machine can be equipped with a pull screw. In this version, the drive unit is located in the direction of the raw material feeding. Some screw conveyors are equipped with push screws with gear motor installed on the feeding side. The screw conveyor is fitted with an initial or end bearing. Depending on the type of transported raw material, slide or bearing rests are installed.
Horizontal screw conveyor has the advantages of sealed operation, simple structure. screw conveyor suitable for conveying powdery, granular and small bulk materials horizontally or aslope, such as coal, ash, slag, cement, food, etc. screw conveyor is an new transportation equipment.
Technical Parameters:
| Model | Screw Diameter | Screw Rotation Speed | Inclination Angle | Conveyor Length |
| (mm) | (r/min) | (degree) | (m) | |
| GX 200 | 200 |
20, 30, 35, 45, 60, 75, 90, 120, 150, 190 |
< 20° | 3~70 |
| GX 250 | 250 | |||
| GX 300 | 300 | |||
| GX 400 | 400 | |||
| GX 500 | 500 | |||
| GX 600 | 600 |
Working principle
The screw conveyor consists of power device, gear box, coupling, screw axis and hanging bearing. The screw axis is made of several sections which connected with spline. Hence, the conveyor hold large load capacity and convenient to dismounting. It is open a besel on the casing to ensure a safe operation.
The material moves along the spiral within the tube. The unique action of the flexible spiral conveyor eliminates the risk of the product separation that can take place in conventional pneumatic conveying systems where mixed materials have components of different densities and particle size.
Features:
1.Simple structure, good sealing, large capacity, long service life.
2.Convenient installation and maintenance, as well as easy operation.
3.Working temperature is -20~50ºC, with material temperature below 200 ºC.
4.Suitable for horizontal and slightly inclined transport of powdery, granular and small lump materials, such as coal, ash, clinker, cement, grain, etc.
5.Widely used in construction, chemical, power, metallurgy, coal and CZPT industries, etc.
Advantage :
1.It can be sealed to prevent the escape of dust or fumes from inside the conveyor; or prevent dust contamination from outside the conveyor.
2.It can be used to control the flow of material in processing operations which depend upon accurate batching
3.It can be utilized in the horizontal, vertical or any inclined position depending upon the characteristics of the product being conveyed.
4.It can be used as a mixer or agitator to blend dry or fluid ingredients, provide crystallization or coagulant action, or maintain solutions in suspension.
5.Screw conveyors can have multiple conveyor outlets, making discharge to multiple outlets cost effective.
6.It can be jacketed to serve as a drier or cooler by running hot or cold water through the jacket.
7.It can be made out of a variety of materials to resist corrosion, abrasion or heat, depending upon the product being conveyed.
8.It can be outfitted with multiple inlet and discharge points.
Maintenance :
1.General Inspection
Routine periodic inspection of the entire conveyor must be established to ensure continuous maximum operating performance. Keep the area around the conveyor and its drive clean and free of obstacles to provide easy access and avoid functional interference of components.
2.Power Lock Out
Lock out power to the motor before attempting any maintenance. Use a padlock and tag on the drive’s controls. Do not remove padlock or tag, nor operate conveyor, until all covers and guards are securely in place.
3.Removing Screw Sections
Screw sections are typically removed starting with the end opposite the drive when necessary. Remove trough end, screw sections, coupling shafts, and hangers until damaged or worn section is removed. Reassemble conveyor in reverse order.
4.Coupling Bolts
Periodically remove and inspect 1 of the drive shaft coupling bolts for damage or wear. Also inspect the coupling bolt hole. The drive shaft coupling bolts transmit more power than successive coupling bolts and will typically indicate the greatest wear. An accurate torque wrench should always be used when tightening coupling bolts. Excessive torque will stretch the bolt and significantly compromise its strength.
5.Lubrication
Lubricate end bearings, hanger bearings and drive components at the frequency and quantity specified by the individual component’s manufacturer. Most types of hanger bearings require lubrication and wear is reduced significantly with a frequent lubrication schedule. Frequency of schedule depends on temperature, type of bearings, type of lubrication, product conveyed, trough load, screw weight, etc.)
6.Screw Bushings/Internal Collars
The bushing at each end of a screw will wear over time. When possible, check for excessive shaft movement that indicates bushings need to be replaced. Longer and heavier screws typically have greater bushing wear.
Selection condition :
Primary considerations for the selection of a screw conveyor are as follow:
1.Type and condition of the materials to be handled, including maximum particle size, and, if available, the specific bulk density of the material to be conveyed.
2.Quantity of transported material, expressed in pounds or tons per hour.
3.The distance for which the material is to be conveyed.
Below is the necessary information for the selection of a screw conveyor system, presented in a series of 5 steps. These steps are arranged in logical order, and are divided into separate sections for simplicity.
The 5 steps are:
1.Establishing the characteristics of the material to be conveyed.
2.Locating conveyor capacity (conveyor size and speed) on capacity tables.
3.Selection of conveyor components.
4.Calculation of required horsepower.
5.Checking of components torque capacities (including selection of shaft types and sizes)
The Benefits of Spline Couplings for Disc Brake Mounting Interfaces
Spline couplings are commonly used for securing disc brake mounting interfaces. Spline couplings are often used in high-performance vehicles, aeronautics, and many other applications. However, the mechanical benefits of splines are not immediately obvious. Listed below are the benefits of spline couplings. We’ll discuss what these advantages mean for you. Read on to discover how these couplings work.
Disc brake mounting interfaces are splined
There are 2 common disc brake mounting interfaces – splined and six-bolt. Splined rotors fit on splined hubs; six-bolt rotors will need an adapter to fit on six-bolt hubs. The six-bolt method is easier to maintain and may be preferred by many cyclists. If you’re thinking of installing a disc brake system, it is important to know how to choose the right splined and center lock interfaces.
Aerospace applications
The splines used for spline coupling in aircraft are highly complex. While some previous researches have addressed the design of splines, few publications have tackled the problem of misaligned spline coupling. Nevertheless, the accurate results we obtained were obtained using dedicated simulation tools, which are not commercially available. Nevertheless, such tools can provide a useful reference for our approach. It would be beneficial if designers could use simple tools for evaluating contact pressure peaks. Our analytical approach makes it possible to find answers to such questions.
The design of a spline coupling for aerospace applications must be accurate to minimize weight and prevent failure mechanisms. In addition to weight reduction, it is necessary to minimize fretting fatigue. The pressure distribution on the spline coupling teeth is a significant factor in determining its fretting fatigue. Therefore, we use analytical and experimental methods to examine the contact pressure distribution in the axial direction of spline couplings.
The teeth of a spline coupling can be categorized by the type of engagement they provide. This study investigates the position of resultant contact forces in the teeth of a spline coupling when applied to pitch diameter. Using FEM models, numerical results are generated for nominal and parallel offset misalignments. The axial tooth profile determines the behavior of the coupling component and its ability to resist wear. Angular misalignment is also a concern, causing misalignment.
In order to assess wear damage of a spline coupling, we must take into consideration the impact of fretting on the components. This wear is caused by relative motion between the teeth that engage them. The misalignment may be caused by vibrations, cyclical tooth deflection, or angular misalignment. The result of this analysis may help designers improve their spline coupling designs and develop improved performance.
CZPT polyimide, an abrasion-resistant polymer, is a popular choice for high-temperature spline couplings. This material reduces friction and wear, provides a low friction surface, and has a low wear rate. Furthermore, it offers up to 50 times the life of metal on metal spline connections. For these reasons, it is important to choose the right material for your spline coupling.
High-performance vehicles
A spline coupler is a device used to connect splined shafts. A typical spline coupler resembles a short pipe with splines on either end. There are 2 basic types of spline coupling: single and dual spline. One type attaches to a drive shaft, while the other attaches to the gearbox. While spline couplings are typically used in racing, they’re also used for performance problems.
The key challenge in spline couplings is to determine the optimal dimension of spline joints. This is difficult because no commercial codes allow the simulation of misaligned joints, which can destroy components. This article presents analytical approaches to estimating contact pressures in spline connections. The results are comparable with numerical approaches but require special codes to accurately model the coupling operation. This research highlights several important issues and aims to make the application of spline couplings in high-performance vehicles easier.
The stiffness of spline assemblies can be calculated using tooth-like structures. Such splines can be incorporated into the spline joint to produce global stiffness for torsional vibration analysis. Bearing reactions are calculated for a certain level of misalignment. This information can be used to design bearing dimensions and correct misalignment. There are 3 types of spline couplings.
Major diameter fit splines are made with tightly controlled outside diameters. This close fit provides concentricity transfer from the male to the female spline. The teeth of the male spline usually have chamfered tips and clearance with fillet radii. These splines are often manufactured from billet steel or aluminum. These materials are renowned for their strength and uniform grain created by the forging process. ANSI and DIN design manuals define classes of fit.
Disc brake mounting interfaces
A spline coupling for disc brake mounting interfaces is a type of hub-to-brake-disc mount. It is a highly durable coupling mechanism that reduces heat transfer from the disc to the axle hub. The mounting arrangement also isolates the axle hub from direct contact with the disc. It is also designed to minimize the amount of vehicle downtime and maintenance required to maintain proper alignment.
Disc brakes typically have substantial metal-to-metal contact with axle hub splines. The discs are held in place on the hub by intermediate inserts. This metal-to-metal contact also aids in the transfer of brake heat from the brake disc to the axle hub. Spline coupling for disc brake mounting interfaces comprises a mounting ring that is either a threaded or non-threaded spline.
During drag brake experiments, perforated friction blocks filled with various additive materials are introduced. The materials included include Cu-based powder metallurgy material, a composite material, and a Mn-Cu damping alloy. The filling material affects the braking interface’s wear behavior and friction-induced vibration characteristics. Different filling materials produce different types of wear debris and have different wear evolutions. They also differ in their surface morphology.
Disc brake couplings are usually made of 2 different types. The plain and HD versions are interchangeable. The plain version is the simplest to install, while the HD version has multiple components. The two-piece couplings are often installed at the same time, but with different mounting interfaces. You should make sure to purchase the appropriate coupling for your vehicle. These interfaces are a vital component of your vehicle and must be installed correctly for proper operation.
Disc brakes use disc-to-hub elements that help locate the forces and displace them to the rim. These elements are typically made of stainless steel, which increases the cost of manufacturing the disc brake mounting interface. Despite their benefits, however, the high braking force loads they endure are hard on the materials. Moreover, excessive heat transferred to the intermediate elements can adversely affect the fatigue life and long-term strength of the brake system.
