Industrial Pipe Auger Spiral Flexible Screw Elevator/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.
Simple structure, good sealing, large capacity, long service life
Convenient installation and maintenance, as well as easy operation.
Working temperature is -20~50ºC, with material temperature below 200 ºC.
Suitable for horizontal and slightly inclined transport of powdery, granular and small lump materials, such as coal, ash, clinker, cement, grain, etc.
Widely used in construction, chemical, power, metallurgy, coal and CZPT industries, etc.
Industrial pipe auger spiral flexible screw elevator/conveyor for sugar, flour, coffee, powder is widely used in chemical, metallurgy, paper making, and construction industries. The equipment is mainly suitable for field flowing work, such as concrete mixing station, bulk material transit storage, etc.
AdvantagePerformance and Features:
It can be sealed to prevent the escape of dust or fumes from inside the conveyor; or prevent dust contamination from outside the conveyor.
It can be used to control the flow of material in processing operations which depend upon accurate batching
It can be utilized in the horizontal, vertical or any inclined position depending upon the characteristics of the product being conveyed.
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.
Screw conveyors can have multiple conveyor outlets, making discharge to multiple outlets cost effective.
It can be jacketed to serve as a drier or cooler by running hot or cold water through the jacket.
It can be made out of a variety of materials to resist corrosion, abrasion or heat, depending upon the product being conveyed.
It can be outfitted with multiple inlet and discharge points.
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.
Information Needed For The Quotation
Primary considerations for the selection of a screw conveyor are as follow:
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.
Quantity of transported material, expressed in pounds or tons per hour.
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:
Establishing the characteristics of the material to be conveyed.
Locating conveyor capacity (conveyor size and speed) on capacity tables.
Selection of conveyor components.
Calculation of required horsepower.
Checking of components torque capacities (including selection of shaft types and sizes)
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.
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.
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.
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.
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.)
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.
|Screw Rotation Speed
|20, 30, 35, 45, 60,
75, 90, 120, 150, 190
Introduction of company
ZheJiang Xihu (West Lake) Dis.an Mining Machinery Co., Ltd is a professional manufacturer of screening equipment, conveying machinery and vibrating feeder etc. The company locates in HangZhou, covering above 60 thousand square meters. Since established in 1960s, the company has been taking the scientific management method of the modern enterprise, producing with advanced production technology and considerate service and developing to a promising pearl of the mechanical industry in China.
What Are the Advantages of a Splined Shaft?
If you are looking for the right splined shaft for your machine, you should know a few important things. First, what type of material should be used? Stainless steel is usually the most appropriate choice, because of its ability to offer low noise and fatigue failure. Secondly, it can be machined using a slotting or shaping machine. Lastly, it will ensure smooth motion. So, what are the advantages of a splined shaft?
Stainless steel is the best material for splined shafts
When choosing a splined shaft, you should consider its hardness, quality, and finish. Stainless steel has superior corrosion and wear resistance. Carbon steel is another good material for splined shafts. Carbon steel has a shallow carbon content (about 1.7%), which makes it more malleable and helps ensure smooth motion. But if you’re not willing to spend the money on stainless steel, consider other options.
There are 2 main types of splines: parallel splines and crowned splines. Involute splines have parallel grooves and allow linear and rotary motion. Helical splines have involute teeth and are oriented at an angle. This type allows for many teeth on the shaft and minimizes the stress concentration in the stationary joint.
Large evenly spaced splines are widely used in hydraulic systems, drivetrains, and machine tools. They are typically made from carbon steel (CR10) and stainless steel (AISI 304). This material is durable and meets the requirements of ISO 14-B, formerly DIN 5463-B. Splined shafts are typically made of stainless steel or C45 steel, though there are many other materials available.
Stainless steel is the best material for a splined shaft. This metal is also incredibly affordable. In most cases, stainless steel is the best choice for these shafts because it offers the best corrosion resistance. There are many different types of splined shafts, and each 1 is suited for a particular application. There are also many different types of stainless steel, so choose stainless steel if you want the best quality.
For those looking for high-quality splined shafts, CZPT Spline Shafts offer many benefits. They can reduce costs, improve positional accuracy, and reduce friction. With the CZPT TFE coating, splined shafts can reduce energy and heat buildup, and extend the life of your products. And, they’re easy to install – all you need to do is install them.
They provide low noise, low wear and fatigue failure
The splines in a splined shaft are composed of 2 main parts: the spline root fillet and the spline relief. The spline root fillet is the most critical part, because fatigue failure starts there and propagates to the relief. The spline relief is more susceptible to fatigue failure because of its involute tooth shape, which offers a lower stress to the shaft and has a smaller area of contact.
The fatigue life of splined shafts is determined by measuring the S-N curve. This is also known as the Wohler curve, and it is the relationship between stress amplitude and number of cycles. It depends on the material, geometry and way of loading. It can be obtained from a physical test on a uniform material specimen under a constant amplitude load. Approximations for low-alloy steel parts can be made using a lower-alloy steel material.
Splined shafts provide low noise, minimal wear and fatigue failure. However, some mechanical transmission elements need to be removed from the shaft during assembly and manufacturing processes. The shafts must still be capable of relative axial movement for functional purposes. As such, good spline joints are essential to high-quality torque transmission, minimal backlash, and low noise. The major failure modes of spline shafts include fretting corrosion, tooth breakage, and fatigue failure.
The outer disc carrier spline is susceptible to tensile stress and fatigue failure. High customer demands for low noise and low wear and fatigue failure makes splined shafts an excellent choice. A fractured spline gear coupling was received for analysis. It was installed near the top of a filter shaft and inserted into the gearbox motor. The service history was unknown. The fractured spline gear coupling had longitudinally cracked and arrested at the termination of the spline gear teeth. The spline gear teeth also exhibited wear and deformation.
A new spline coupling method detects fault propagation in hollow cylindrical splined shafts. A spline coupling is fabricated using an AE method with the spline section unrolled into a metal plate of the same thickness as the cylinder wall. In addition, the spline coupling is misaligned, which puts significant concentration on the spline teeth. This further accelerates the rate of fretting fatigue and wear.
A spline joint should be lubricated after 25 hours of operation. Frequent lubrication can increase maintenance costs and cause downtime. Moreover, the lubricant may retain abrasive particles at the interfaces. In some cases, lubricants can even cause misalignment, leading to premature failure. So, the lubrication of a spline coupling is vital in ensuring proper functioning of the shaft.
The design of a spline coupling can be optimized to enhance its wear resistance and reliability. Surface treatments, loads, and rotation affect the friction properties of a spline coupling. In addition, a finite element method was developed to predict wear of a floating spline coupling. This method is feasible and provides a reliable basis for predicting the wear and fatigue life of a spline coupling.
They can be machined using a slotting or shaping machine
Machines can be used to shape splined shafts in a variety of industries. They are useful in many applications, including gearboxes, braking systems, and axles. A slotted shaft can be manipulated in several ways, including hobbling, broaching, and slotting. In addition to shaping, splines are also useful in reducing bar diameter.
When using a slotting or shaping machine, the workpiece is held against a pedestal that has a uniform thickness. The machine is equipped with a stand column and limiting column (Figure 1), each positioned perpendicular to the upper surface of the pedestal. The limiting column axis is located on the same line as the stand column. During the slotting or shaping process, the tool is fed in and out until the desired space is achieved.
One process involves cutting splines into a shaft. Straddle milling, spline shaping, and spline cutting are 2 common processes used to create splined shafts. Straddle milling involves a fixed indexing fixture that holds the shaft steady, while rotating milling cutters cut the groove in the length of the shaft. Several passes are required to ensure uniformity throughout the spline.
Splines are a type of gear. The ridges or teeth on the drive shaft mesh with grooves in the mating piece. A splined shaft allows the transmission of torque to a mate piece while maximizing the power transfer. Splines are used in heavy vehicles, construction, agriculture, and massive earthmoving machinery. Splines are used in virtually every type of rotary motion, from axles to transmission systems. They also offer better fatigue life and reliability.
Slotting or shaping machines can also be used to shape splined shafts. Slotting machines are often used to machine splined shafts, because it is easier to make them with these machines. Using a slotting or shaping machine can result in splined shafts of different sizes. It is important to follow a set of spline standards to ensure your parts are manufactured to the highest standards.
A milling machine is another option for producing splined shafts. A spline shaft can be set up between 2 centers in an indexing fixture. Two side milling cutters are mounted on an arbor and a spacer and shims are inserted between them. The arbor and cutters are then mounted to a milling machine spindle. To make sure the cutters center themselves over the splined shaft, an adjustment must be made to the spindle of the machine.
The machining process is very different for internal and external splines. External splines can be broached, shaped, milled, or hobbed, while internal splines cannot. These machines use hard alloy, but they are not as good for internal splines. A machine with a slotting mechanism is necessary for these operations.