China manufacturer Rotary Drum Sieving Machine with Great quality

Product Description

Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener
 

·INTRODUCTION of Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener

The rotary sieving machine is mainly used for the separation of the finished products ( powder or granules ) and the return material, and can also realize the grading of the products, so that the finished products ( powder or granule ) can be evenly classified. 
 
This machine is adopts a combined screen mesh for easy maintenance and replacement. This machine has simple structure, convenient operation and stable operation etc advantage , and it is an ideal equipment in the production process of organic fertilizer and compound fertilizer.
 
The rotary sieving machine is mainly constitute of motor, gear reducer , roller device, frame, sealing cover, and inlet and outlet etc . The roller device is obliquely mounted on the frame, and the motor transmits power through the gear reducer , and is coupled to the roller device through the coupling to drive the roller device to rotate about its axis . After the material ( granule ) enters the roller device, due to the tilting and rotation of the roller device, the material on the screen is turned over and rolled , so that the right size material (the product under the sieve) is discharged through the discharge hole at the bottom of the rear end , and the unqualified material (on the sieve) is discharged through the discharge hole at the end of the sieving device. The material continuously flip and scroll in the sieving device , so that the material stuck in the sieve hole can be ejected to prevent the screen hole blocked . The screening cylinder can be closed, easy to close and collect dust, and meet the requirements of environmental protection.

·ADVANTAGE of Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener

1.The material is not easy to block the sieve hole;
2.Simple structure and convenient maintenance;
3.Smooth operation and low noise;
4.The screening cylinder can be closed  or opened and the sealing is easy to close and collect dust;
5.The machine has high reliability and less one-time investment;
6.Adopt special screen, high screening efficiency and long service life.

·STRUCTURE of Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener

This machine can divided into 3 parts:
1. Rack part: The machine frame is welded by high carbon steel plate and channel steel, and through strict product certification and specific technical requirements, it has reached the purpose of the machine.
2. Transmission and screening part: This part uses a combined screen mesh, which is transmitted through a coupling to the main shaft by a transmission wheel, which is installed and welded on the roller cage of the main shaft. The material is entered from the feed end, and the roll cage is continuously turned and graded, and the outlet is outflow evenly from the bottom, which effectively separations the finished product from the Re-material, thus improving the working efficiency.
3. Transmission connection part: The motor drives the pulley, the triangle belt and the reducer to make the spindle rotating. In which the drive reducer and the main working part of the main engine are driven by the axle pin couple, it is convenient to assemble and maintain.

·PARAMETERS of Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener
 

Model Barrel Rotation Speed Inclination Power Capacity Dimensions Weight
Diameter Length L× W × H
mm mm r/min 0 kW t/h mm tons
GS1.0×3.0 1000 3000 22 2-2.5 2.2 1-3 3500×1400×2200 1.5
GS1.2×4.5 1200 4500 17 2-2.5 3.0 3-5 5700×1600×2400 2.5
GS1.5×5.0 1500 5000 14 2-2.5 5.5 5-10 6860×1900×2810 3.8
GS1.0×3.0 1000 3000 22 2-2.5 2.2 10-20 3500×1400×2200 1.5
GS1.6×6.0 1600 6000 12 2-2.5 7.5 10-20 7300×2000×3000 4.7
GS1.2×4.0 1200 4000 16 2-2.5 3.0 20-25 5200×600×2360 2.3
GS1.8×6.5 1800 6500 11.5 2-2.5 7.5 20-25 9000×2200×3200 6.0

·INQUIRY OF Rotary Drum Sieving Machine/Drum Screening Machine/ Trommel Screener
·
DELIVERY OF ROTARY DRUM SIEVING MACHINE/DRUM SCREENING MACHINE/ TROMMEL SCREENER

·WHY CHOOSE CZPT ROTARY DRUM SIEVING MACHINE/DRUM SCREENING MACHINE/ TROMMEL SCREENER

Certified with ISO9001 quality management system and CE certificate, HangZhou CZPT Machinery Co., Ltd is the forerunner and expert among the fertilizer and Animal feed machinery manufacturers in ZheJiang Province, China.

Totally, we have 3 factories, land area over 10 millions cubic meters, with more than 25 technical engineers and 70 workers. Thus we have strong technical strength, high-quality staff and CAD design center, thus we can provide fertilizer and feed plant design, process improvement, equipment manufacture, installation, commissioning, formula and etc.  Since 2009, we have exported the machines to more than 100 countries.

By the end of 2019, we have established more than 70 factories around the world, for example, 100,000Ton/Year NPK Fertilizer plant in SA, 150,000Ton/Year NPK Fertilizer plant in Syria, 80,000Ton/Year NPK Fertilizer plant in Zimbabwe, 50,000Ton/Year Organic Fertilizer plant in Nepal, 5,000Ton/Year Powder Organic Fertilizer plant in Nepal, 20,00Ton/Year Organic Granule Fertilizer plant in Nepal, 10,000Ton/Year chicken feed plant in Nigeria, 20,000Ton/Year Floating fish feed plant in Nigeria, 20,000Ton/Year Fish feed Plant in Iran, 5,000Ton/Year Floating fish feed plant in Congo, 10,000Ton/Year Bio-pellet plant in Vietnam, 80,000Ton/Year feed-pellet plant in Thailand, 50,000Ton/Year Bio-pellet Plant in USA, 30,000Ton/Year Bio-pellet Plant in Bulgaria etc.

Based on the professional maintenance team, adequate inventory spare parts, standardized after-sales service, perfect customer return visit management, mature training system, we always win most customers around the world.

We are experienced in manufacturing professional equipment for fertilizer and feed production. As for manage principles, we insist to hold the view of “quality, mission, and values.”

·Quality
Being a large and professional machinery manufacturer, our factory has manufactured a series of modern specified equipment for fertilizer and feed production, including both the equipment for each process of the production line and the whole production line. Our equipment adopts the latest technology, which can make the production process more environment friendly, energy-saving and economic. Most importantly, it can ensure the quality of the final fertilizer and feed products.

·Mission
Our factory is featured with its strong technical powers, complete processing equipment and reasonable management principles. Our products are various and complete, including the fertilizer compost turner machine, crusher, mixer, fertilizer granulation machine, polishing machine, dryer, cooler, rotary sieve, coating machine, packaging machine as well as the complete new-type fertilizer production line for both organic fertilizer and compound fertilizer production. For the feed industry, we can offer you the hammer mill, Mixer, flat die/ring die pellet mill, feed extruder, air cooler, packager, and other related machines.
We aim at providing you with a more scientific and efficient way of producing qualified fertilizer and nice feed.

·Values
We always insist that quality and customers should come first. Therefore, we strive every effort to improve our services and make breakthroughs step by step, which in turn will make our products better meet the needs of our customers and improve our competitiveness in the fertilizer market all over the world.
Your satisfactions are all that we pursuit! Contact us if you are interested in our products. We are honored to provide you with any service.

·Service

Pre-sale service
Act as a good adviser and assistant of clients to enable them get rich and generous returns on their investments.
1. Introduce the product to the customer in detail, answer the question raised by customer carefully;
2.Make plans for choice according to the needs and special requirements of users in different sectors;
3. We have certain machines in lab for customer testing.

Sale service
1. Ensure product with high quality and pre-commissioning before delivery;
2. Delivery on time;
3.Provide full set of documents as customer’s requirements.

After-sale service
Provide considerate services to minimize clients’ worries.
1.Assist clients to prepare for the first construction scheme;
2.Install and debug the equipment;
3.Train the first-line operators;
4. Examine the equipment;
5.Take initiative to eliminate the troubles rapidly;
6.Provide technical support;
7.Establish long-term and friendly relationship.

Service commitment
1. Provide clients one-year warranty to make sure the machine work well;
2.We always keep certain inventory level of spare parts, which means the replacements can be sent to you timely.

·Contact
If you want to win, please come and visit Hanghui.
If you want to learn, also please come and visit Hanghui.
ROTARY DRUM SIEVING MACHINE/DRUM SCREENING MACHINE/ TROMMEL SCREENER
 

How to Calculate Stiffness, Centering Force, Wear and Fatigue Failure of Spline Couplings

There are various types of spline couplings. These couplings have several important properties. These properties are: Stiffness, Involute splines, Misalignment, Wear and fatigue failure. To understand how these characteristics relate to spline couplings, read this article. It will give you the necessary knowledge to determine which type of coupling best suits your needs. Keeping in mind that spline couplings are usually spherical in shape, they are made of steel.
splineshaft

Involute splines

An effective side interference condition minimizes gear misalignment. When 2 splines are coupled with no spline misalignment, the maximum tensile root stress shifts to the left by 5 mm. A linear lead variation, which results from multiple connections along the length of the spline contact, increases the effective clearance or interference by a given percentage. This type of misalignment is undesirable for coupling high-speed equipment.
Involute splines are often used in gearboxes. These splines transmit high torque, and are better able to distribute load among multiple teeth throughout the coupling circumference. The involute profile and lead errors are related to the spacing between spline teeth and keyways. For coupling applications, industry practices use splines with 25 to 50-percent of spline teeth engaged. This load distribution is more uniform than that of conventional single-key couplings.
To determine the optimal tooth engagement for an involved spline coupling, Xiangzhen Xue and colleagues used a computer model to simulate the stress applied to the splines. The results from this study showed that a “permissible” Ruiz parameter should be used in coupling. By predicting the amount of wear and tear on a crowned spline, the researchers could accurately predict how much damage the components will sustain during the coupling process.
There are several ways to determine the optimal pressure angle for an involute spline. Involute splines are commonly measured using a pressure angle of 30 degrees. Similar to gears, involute splines are typically tested through a measurement over pins. This involves inserting specific-sized wires between gear teeth and measuring the distance between them. This method can tell whether the gear has a proper tooth profile.
The spline system shown in Figure 1 illustrates a vibration model. This simulation allows the user to understand how involute splines are used in coupling. The vibration model shows 4 concentrated mass blocks that represent the prime mover, the internal spline, and the load. It is important to note that the meshing deformation function represents the forces acting on these 3 components.
splineshaft

Stiffness of coupling

The calculation of stiffness of a spline coupling involves the measurement of its tooth engagement. In the following, we analyze the stiffness of a spline coupling with various types of teeth using 2 different methods. Direct inversion and blockwise inversion both reduce CPU time for stiffness calculation. However, they require evaluation submatrices. Here, we discuss the differences between these 2 methods.
The analytical model for spline couplings is derived in the second section. In the third section, the calculation process is explained in detail. We then validate this model against the FE method. Finally, we discuss the influence of stiffness nonlinearity on the rotor dynamics. Finally, we discuss the advantages and disadvantages of each method. We present a simple yet effective method for estimating the lateral stiffness of spline couplings.
The numerical calculation of the spline coupling is based on the semi-analytical spline load distribution model. This method involves refined contact grids and updating the compliance matrix at each iteration. Hence, it consumes significant computational time. Further, it is difficult to apply this method to the dynamic analysis of a rotor. This method has its own limitations and should be used only when the spline coupling is fully investigated.
The meshing force is the force generated by a misaligned spline coupling. It is related to the spline thickness and the transmitting torque of the rotor. The meshing force is also related to the dynamic vibration displacement. The result obtained from the meshing force analysis is given in Figures 7, 8, and 9.
The analysis presented in this paper aims to investigate the stiffness of spline couplings with a misaligned spline. Although the results of previous studies were accurate, some issues remained. For example, the misalignment of the spline may cause contact damages. The aim of this article is to investigate the problems associated with misaligned spline couplings and propose an analytical approach for estimating the contact pressure in a spline connection. We also compare our results to those obtained by pure numerical approaches.

Misalignment

To determine the centering force, the effective pressure angle must be known. Using the effective pressure angle, the centering force is calculated based on the maximum axial and radial loads and updated Dudley misalignment factors. The centering force is the maximum axial force that can be transmitted by friction. Several published misalignment factors are also included in the calculation. A new method is presented in this paper that considers the cam effect in the normal force.
In this new method, the stiffness along the spline joint can be integrated to obtain a global stiffness that is applicable to torsional vibration analysis. The stiffness of bearings can also be calculated at given levels of misalignment, allowing for accurate estimation of bearing dimensions. It is advisable to check the stiffness of bearings at all times to ensure that they are properly sized and aligned.
A misalignment in a spline coupling can result in wear or even failure. This is caused by an incorrectly aligned pitch profile. This problem is often overlooked, as the teeth are in contact throughout the involute profile. This causes the load to not be evenly distributed along the contact line. Consequently, it is important to consider the effect of misalignment on the contact force on the teeth of the spline coupling.
The centre of the male spline in Figure 2 is superposed on the female spline. The alignment meshing distances are also identical. Hence, the meshing force curves will change according to the dynamic vibration displacement. It is necessary to know the parameters of a spline coupling before implementing it. In this paper, the model for misalignment is presented for spline couplings and the related parameters.
Using a self-made spline coupling test rig, the effects of misalignment on a spline coupling are studied. In contrast to the typical spline coupling, misalignment in a spline coupling causes fretting wear at a specific position on the tooth surface. This is a leading cause of failure in these types of couplings.
splineshaft

Wear and fatigue failure

The failure of a spline coupling due to wear and fatigue is determined by the first occurrence of tooth wear and shaft misalignment. Standard design methods do not account for wear damage and assess the fatigue life with big approximations. Experimental investigations have been conducted to assess wear and fatigue damage in spline couplings. The tests were conducted on a dedicated test rig and special device connected to a standard fatigue machine. The working parameters such as torque, misalignment angle, and axial distance have been varied in order to measure fatigue damage. Over dimensioning has also been assessed.
During fatigue and wear, mechanical sliding takes place between the external and internal splines and results in catastrophic failure. The lack of literature on the wear and fatigue of spline couplings in aero-engines may be due to the lack of data on the coupling’s application. Wear and fatigue failure in splines depends on a number of factors, including the material pair, geometry, and lubrication conditions.
The analysis of spline couplings shows that over-dimensioning is common and leads to different damages in the system. Some of the major damages are wear, fretting, corrosion, and teeth fatigue. Noise problems have also been observed in industrial settings. However, it is difficult to evaluate the contact behavior of spline couplings, and numerical simulations are often hampered by the use of specific codes and the boundary element method.
The failure of a spline gear coupling was caused by fatigue, and the fracture initiated at the bottom corner radius of the keyway. The keyway and splines had been overloaded beyond their yield strength, and significant yielding was observed in the spline gear teeth. A fracture ring of non-standard alloy steel exhibited a sharp corner radius, which was a significant stress raiser.
Several components were studied to determine their life span. These components include the spline shaft, the sealing bolt, and the graphite ring. Each of these components has its own set of design parameters. However, there are similarities in the distributions of these components. Wear and fatigue failure of spline couplings can be attributed to a combination of the 3 factors. A failure mode is often defined as a non-linear distribution of stresses and strains.

China manufacturer Rotary Drum Sieving Machine     with Great qualityChina manufacturer Rotary Drum Sieving Machine     with Great quality