What Is Continuous Casting Machine?

Continuous steel casting refers to the production process of continuously pouring high-temperature molten steel onto cast slabs with a certain cross-sectional shape and size specifications. To complete this process, the equipment required is called a complete set of continuous casting equipment. Mechatronics casting equipment, continuous casting fuselage equipment, cutting area equipment, and ingot bar receiving equipment, etc. constitute the continuous casting steel core equipment, which is often referred to as a continuous casting machine.

The continuous casting process of the continuous casting machine. When high-temperature molten steel is continuously poured into one or a group of cold copper molds, the molten steel gradually solidifies into a blank shell around the mold. When the steel liquid level rises to a certain height and the blank shell solidifies to a certain thickness, pull out the orthopedic machine and pull it out. The billet shell is cooled by spraying water in the secondary cooling zone to completely solidify the billet shell. Then, according to the needs of steel rolling, the cutting equipment cuts the billet into size. This process of pouring high-temperature molten steel directly onto the billet is called continuous casting.

Continuous casting machine can be divided into many different types. According to its structure and shape, the continuous casting machine can be divided into vertical curve, arc straight section, arc section, multi-radius ellipse, horizontal continuous casting machine and other types. With the development of continuous casting technology, wheeled continuous casting machine, especially thin slab continuous casting machines have been developed again.

If distinguished by the size and shape of its casting section, the continuous casting machine can be divided into slab continuous casting machine, billet continuous casting machine, bloom continuous casting machine, round billet continuous casting machine, special-shaped section continuous casting machine, and slab caster. The rectangular billet continuous casting machine also includes the rectangular billet on the rectangular billet continuous casting machine. The cast slab whose casting cross-section or equivalent sectional area is greater than 200×200mm is called bloom, and the cast slab with the cross-section or equivalent sectional area less than 160×160mm is called a small billet. Square billets, rectangular billets with a width ratio greater than 3 are called slabs.

According to how many slabs can be poured by the continuous casting machine in the same ladle, it can be divided into three types: single-strand, double-strand, and multi-strand.

 

The emergence of the continuous casting machine has fundamentally changed the one-time rolling and serving method of steel ingots for a century. The use of a continuous casting machine has the advantages of simplifying production procedures, improving production efficiency and metal yield, saving energy, greatly reducing production costs, and ensuring the quality of billets. It has developed rapidly at home and abroad. In today's steelmaking enterprises, it is almost inevitable to equip continuous casters, no matter if it is a long process or a short process.

If you are interested in purchasing the continuous casting machine, please mail at marketing2@hanrm.com.

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What are the Advantages of Medium Frequency Furnace in Metal Smelting?

In recent years, with the development of science and technology and the improvement of product quality requirements, many manufacturers choose to use intermediate frequency furnaces for non-ferrous metal smelting and obtain remarkable results. So, what are the advantages of a medium frequency furnace in metal smelting?

First of all, the intermediate frequency furnace is easy to operate, fast heating, and low energy consumption, which can ensure the optimal and stable melting process and reduce the complicated work of furnace workers. With the adoption of new technology, new material, and new processes, the performance and application effect of medium frequency furnaces are becoming more and more perfect, showing more and more vitality, and obtaining remarkable social and economic benefits.

Secondly, in terms of frequency conversion equipment, the original thyristor intermediate frequency equipment gives full play to its advantages of a lightweight, high efficiency, fast start-up, power saving, fast melting speed, simple manufacturing process, etc., and adopts the frequency automatic tracking system, which can automatically adjust the frequency with load change without switching capacitors. In recent years, the intermediate frequency furnace adopts an advanced IGBT frequency conversion induction heating device, with high element density, outstanding performance, better start-up, more reliable use, simple and convenient maintenance, less floor space and more advanced manufacturing process.

Third, the furnace body and lining of the intermediate frequency furnace are made of a new structure and new materials, and the part close to the inductor coil is isolated with high insulation and high strength materials, which greatly prolongs the service life of the crucible and furnace village and makes it easier to replace the crucible. The heating efficiency of graphite crucible and quartz crucible is much higher than that of the refractory crucible, which shortens the melting time and greatly reduces the heat loss. The maximum temperature of the intermediate frequency furnace is 2600 ℃, which is especially suitable for smelting platinum, gold, K-gold, silver, copper, aluminum, and other metals. The electric efficiency reaches 90-95, and ideal economic benefits can be obtained.

Finally, compared with other types of the smelting furnace, the specific power of the intermediate frequency furnace is higher, and the metal is heated by electromagnetic induction, so the temperature rises and melts quickly. There is no need for starter and residual metal liquid, and it can be melted only by adding scrap or small material. It is very suitable for intermittent operation and frequent change of metal grade, and has great adaptability and flexibility.

So many advantages make intermediate frequency furnaces popular in the industry. Nowadays, the medium frequency furnace is gradually exploring into large, medium, and small factories, the scope of application is expanding, the variety of equipment is increasing, and the degree of automation is also improving. It is believed that medium frequency furnaces will play a more and more important role in high-tech, high-quality product manufacturing and jewelry processing.

If you are interested in purchasing medium frequency furnace, please mail at marketing2@hanrm.com directly.

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5. The Advantages of DC Electric Arc Furnace

6. Electric Arc Furnace Steelmaking Process

7. Factors Affecting Energy Consumption of Intermediate Frequency Furnace

8. How Does Electric Arc Furnace Work?

Solution to Environmental Protection Problems of Intermediate Frequency Furnace

1. Dust removal of intermediate frequency electric furnace

Since the charge of induction heating furnace usually contains dust and oil, soot will rise from the furnace mouth when the charge is added to the furnace. If the charge contains zinc-plated materials and waste materials, the dust produced will also contain zinc or tin oxides. The smoke and dust generated in the operation of the intermediate frequency heating furnace is harmful to the human body and the production environment, so a dust removal system must be used to discharge the harmful smoke and dust outdoors. The amount of soot produced is related to the size of the intermediate frequency equipment and the cleanliness of the charge. The air volume of the dust removal system should be large enough to generate a large amount of negative pressure at the furnace mouth.

The dust removal system consists of an induced draft fan, a dust collector, a cyclone separator, a flue gas temperature adjustment device, and pipelines. In order to ensure that the temperature of the flue gas entering the precipitator does not exceed the value that the precipitator can withstand, the flue gas temperature adjustment device can adjust the amount of cold air mixed to control the temperature of the flue gas entering the precipitator. The flue gas of the intermediate frequency furnace through the dust removal system should meet the national standard GB9078-1996 "Industrial Kiln Air Pollutant Emission Standard". In order to capture the smoke and dust, the intermediate frequency electric furnace is generally equipped with a furnace mouth dust removal ring or a full cover type dust removal furnace cover. The dust removal ring at the furnace mouth is not as good as the full cover dust removal furnace cover, but it is suitable for electromagnetic chuck or manual feeding, so it is more used on furnaces less than 5t. The full hood dust removal furnace cover has a better ability to capture smoke and dust, and needs to be used in conjunction with a charging car, usually used for furnaces with larger specifications.

For the dust removal of the intermediate frequency electric furnace, it is very important to select a dust removal system with good performance. However, the maintenance of the dust removal system is also very important. The dust collector and pipes should be cleaned regularly to maintain the system with a good dust removal effect.

2. Noise of intermediate frequency furnace

During the operation of the intermediate frequency electric furnace, noise is mainly generated from the intermediate frequency power supply, furnace body and hydraulic pump. Secondly, the noise level generated by transformers and water pumps is relatively small. Generally, it is required that the noise at the furnace working platform 1m away from the furnace body and the height of 1m should be ≤85dB (excluding background noise).

At present, most of the equipment layout of intermediate frequency electric furnaces place the intermediate frequency power supply, furnace body, hydraulic pump station and water pump station under the working platform (in a semi-underground pit), which is helpful to reduce the noise at the operating station on the working platform. Improving the operating environment of workers plays a big role.

When the furnace with high power density is in operation, the noise is relatively large due to the vibration of the induction coil, yoke and other components. If necessary, the furnace body structure can take some measures to reduce noise, such as lining the inner wall of the furnace shell with sound insulation material, repair hole cover plate with rubber pad, and filling in the cavity of the furnace body structure. The hydraulic pump is noisy when it is working, so it should be shut down in time when it is not in use. For this reason, there is a stop button on the hydraulic operation console, so that the operator can stop the hydraulic pump in time, or configure a timer to shut down the hydraulic pump on time.



3. Harmonic problem of intermediate frequency furnace

Solid-state intermediate frequency power supplies use electronic devices such as thyristors, diodes, and IGBTs for rectification and inversion, which will cause harmonic interference to the power supply grid. With the widespread application of electronic devices such as electronic computers and numerical control machine tools, the requirements for power quality of the power grid are getting higher and higher. In modern industrial production, the use of various converter equipment is increasing, and the capacity is also increasing. The harmonics generated by it are injected into the power grid, distorting the voltage waveform of the public power grid, affecting the quality of power, and threatening the safe and economic operation of various electrical equipment. To this end, the country formulated the national standard GB/T14549-1993 "power quality, harmonics of the public grid". This standard specifies the allowable value of harmonics injected into the grid.

The harmonic interference produced by the solid-state intermediate frequency power supply mainly depends on the form of its rectifier circuit.

The rectification of the voltage feedback series resonant intermediate frequency power supply adopts a bridge-type uncontrollable rectifier circuit, which generates fewer harmonics than the current feedback parallel resonant intermediate frequency power supply.

In addition, the use of multi-phase rectification methods, such as 6-phase 12-pulse rectification, 12-phase 24-pulse rectification, and the rectifier transformer windings are equalized, can greatly reduce the harmonic interference of the intermediate frequency electric furnace.

4. Magnetic field of intermediate frequency electric furnace

Alternating current passing through the coil of the induction heating furnace will generate an alternating magnetic field. The strength of the magnetic field depends on the power of the electric furnace. At present, the working frequency of the intermediate frequency electric furnace is 100-3000 Hz. This frequency is not a radio wave transmission frequency, and generally does not cause interference to radio communications. However, if technical measures are not taken to limit the alternating magnetic field generated by the induction coil, the alternating magnetic field will heat the metal parts near the furnace, causing harm to workers operating on the furnace (especially for metal dentures). , Metal artificial joints, etc.), so the intermediate frequency electric furnace needs to use a yoke to restrict the magnetic field from radiating outward. Modern coreless induction furnaces are surrounded by multiple yokes around the induction coil. The length enclosed by the yoke in the circumferential direction of the coil reaches 60% to 65% of the circumference of the coil.

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Factors Affecting Energy Consumption of Intermediate Frequency Furnace

The intermediate frequency furnace has the advantages of high electrical and thermal efficiency, short melting time, power saving, less floor space, lower investment, easy process automation, and production flexibility. Compared with other melting furnaces, such as industrial frequency furnaces, intermediate frequency furnace has lower energy consumption and higher production efficiency. However, the low energy consumption is relative to other equipment. For enterprise production, it is of course to achieve the maximum benefit as the goal and minimize energy consumption. Therefore, it is necessary to increase the production base and reduce the total energy consumption.

To reduce the energy consumption of the intermediate frequency furnace, it is necessary to understand the factors that affect the energy consumption of the intermediate frequency furnace. The main factors affecting the energy consumption of the intermediate frequency furnace are as follows:

1. Power

The power density configuration of the induction furnace. High configuration, fast melting speed and good energy-saving effect. Whether the electric furnace can maintain high power and continuously send power to the furnace will affect the level of energy consumption; the messy arrangement of the power cord of the intermediate frequency furnace will affect the processing capacity of the power supply, resulting in unstable power, low power conversion efficiency, and energy consumption.

2. Melt

The cleanliness of the surface of the charge, if there are 5% impurities, it will consume 5% of the electrical energy to melt these impurities, which will also affect the life of the furnace lining; whether the length of the charge block is appropriate will affect the electric efficiency and melting quality of the electric furnace, generally 200～ 300mm block size is appropriate.

3. Refractory materials

Using a suitable crucible can increase the melting rate. Quartz crucibles are resistant to high temperatures, and when used with intermediate frequency furnaces, the metal materials in the crucible can generate heat by induction heating, which can reduce the consumption of heat transfer.

4. The improper operation causes high energy consumption

The molten metal is overheated, and the furnace is discharged continuously. Not only is it unsafe, but it is also wrong in terms of energy consumption and the melting process. Generally, electric furnace sensors are divided into upper and lower parts. When the molten metal level in the furnace is lower than half of the upper sensor, due to the change of resistance, the upper sensor no longer has induced current to pass, and all are concentrated in the lower sensor, making the lower molten metal overheating, scouring the furnace wall, the life of the furnace lining drops sharply.

Understanding these four major factors that affect the energy consumption of intermediate frequency furnaces and improving them in production can avoid unnecessary consumption, reduce production costs, and improve production efficiency.

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Intermediate Frequency Furnace VS Electric Arc Furnace?

Intermediate frequency furnace 
Intermediate frequency furnace is a power supply device that converts 50HZ power frequency alternating current into intermediate frequency (above 300HZ to 20K HZ). It converts three-phase power frequency alternating current into direct current after rectification, and then converts the direct current into adjustable intermediate frequency current. The medium frequency alternating current flowing in the capacitor and the induction coil generates high-density magnetic lines of force in the induction coil, and cuts the metal material contained in the induction coil, which generates a large eddy current in the metal material.

This kind of eddy current also has some properties of intermediate frequency current, that is, the free electrons of the metal itself flow in the resistive metal body to generate heat. For example, if a metal cylinder is placed in an induction coil with alternating intermediate frequency current, the metal cylinder is not in direct contact with the induction coil, and the temperature of the electrified coil itself is already very low, but the surface of the cylinder is heated to redness or even melting , and this redness and melting speed can be achieved only by adjusting the frequency and the strength of the current. If the cylinder is placed in the center of the coil, then the temperature around the cylinder is the same, and the heating and melting of the cylinder will not produce harmful gas or bright light to pollute the environment.

Smelting furnace characteristics of intermediate frequency furnace series:

(1) High melting efficiency, good power saving effect, compact structure, strong overload capacity

(2) The temperature around the furnace is low, there is less smoke and dust, and the working environment is good.

(3) The operation process is simple and the melting operation is reliable.

(4) The metal composition is uniform.

(5) The melting temperature is fast, the furnace temperature is easy to control, and the production efficiency is high.

(6) The furnace utilization rate is high and it is convenient to change the varieties.

(7) The long arc-shaped yoke shields the magnetic flux leakage and reduces the external magnetic resistance. There is magnetic leakage at both ends of the shielded coil. The inner side of the yoke section is arc-shaped and seamlessly adheres to the outer wall, which increases the effective magnetic permeability area and makes the lower ring Get better support. The unique positive and negative coils greatly improve the efficiency of the system.

Intermediate frequency furnace series diathermic furnace features:

●Fast heating speed, high production efficiency, less oxidation decarbonization, saving materials and forging die costs

●Excellent working environment, improving workers' working environment and company image, no pollution, low energy consumption

●The heating is uniform, the temperature difference between the core and the surface is very small, and the temperature control accuracy is high

Intermediate frequency furnace heating device has the advantages of small size, light weight, high efficiency, excellent thermal processing quality. It is rapidly eliminating coal-fired furnaces, gas furnaces, oil-fired furnaces and ordinary resistance furnaces. It is a new generation of metal heating equipment.

The intermediate frequency furnace is the main equipment of the foundry, forging and heat treatment workshop. The stability, reliability and safety of its work are the guarantee for the normal and stable operation of the casting, forging and heat treatment production line of the flow operation.

Electric arc furnace

An electric furnace for smelting ores and metals using the high temperature generated by the electrode arc. The energy is concentrated when gas discharge forms an arc, and the temperature of the arc zone is above 3000 ℃. For smelting metals, electric arc furnaces are more flexible than other steelmaking furnaces, can effectively remove impurities such as sulfur and phosphorus, furnace temperature is easy to control, and the equipment occupies a small area, which is suitable for smelting high-quality alloy steel. Electric arc furnaces can be divided into three-phase electric arc furnaces, consumable electric arc furnaces, single-phase electric arc furnaces and resistance electric arc furnaces according to the arc form. The furnace body of the electric arc steelmaking furnace is composed of a furnace cover, a furnace door, a tapping trough and a furnace body, and the furnace bottom and furnace walls are built with alkaline refractory materials or acid refractory materials.

Electric arc steelmaking furnaces are divided into ordinary power electric arc furnaces, high power electric arc furnaces and ultra-high power electric arc furnaces according to the transformer capacity per ton of furnace capacity. Electric arc furnace steelmaking is to input electric energy into the electric arc steelmaking furnace through graphite electrodes, and the electric arc generated between the electrode end and the charge is used as the heat source for steelmaking. The electric arc furnace uses electric energy as the heat source, and the atmosphere in the furnace can be adjusted, which is extremely beneficial to the smelting of steels that contain more oxidizable elements. Soon after the invention of electric arc furnace steelmaking, it was used to smelt alloy steel and has been greatly developed.

With the improvement of electric arc furnace equipment and the improvement of smelting technology, the development of electric power industry, the cost of electric arc furnace steelmaking continues to decline. Now electric arc furnace steelmaking is not only used for the production of alloy steel, but also for the production of ordinary carbon steel. The proportion of output in the total steel output of major industrial countries continues to rise.

The cost of electric arc furnace is very expensive, but the product quality is good, the public frequency furnace consumes the most electricity, the intermediate frequency furnace is 800-900 degrees/ton below 2000KW, and the large furnace is 600-700 degrees/ton. These are just normal conditions, plus human factors ( operation proficiency, equipment maintenance level), equipment aging, various compensation, harmonic control, and other factors will affect power consumption.

Compared with electric arc furnace, the cost of intermediate frequency furnace steelmaking is lower, and it is suitable for small and medium-sized enterprises (small workshops). However, the steel produced by it has many impurities and high carbon content, so the steel produced is not pure, and those with low requirements can choose The steel produced by the intermediate frequency furnace is usually more than 3 tons in volume. Therefore, the electric arc furnace is only used by enterprises with a certain scale, and the steel produced by it is relatively pure.

The electric arc furnace uses power frequency electricity, while the intermediate frequency electric furnace uses intermediate frequency electricity.


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Electric Arc Furnace Steelmaking Process

1. Feeding

The operation of adding molten iron or scrap steel to the electric furnace is the first step of the electric furnace steelmaking operation.

2. Slagging

The operation of adjusting the slag composition, alkalinity, viscosity and reaction ability in steel and iron production. For example, the oxygen blowing operation is to generate slag with sufficient fluidity and alkalinity, which can transfer enough oxygen to the metal surface, so as to reduce the sulfur and phosphorus below the upper limit of the planned steel grade, and the amount of splashing and slag spilling during oxygen blowing should be minimized.

3. Slag discharge

It refers to the slagging operation taken during the smelting process in the electric arc furnace steelmaking according to different smelting conditions and purposes. For example, when single slag method is used for smelting, oxidation slag must be removed at the end of oxidation; when double slag method is used to make reduction slag, the original oxidation slag must be completely released to prevent phosphorus from returning.

4. Molten pool mixing

Supply energy to the molten metal pool to make the molten metal and slag move to improve the kinetic conditions of the metallurgical reaction. The stirring of the molten pool can be achieved by means of gas, mechanical, electromagnetic induction and other methods.

5. Dephosphorization

It’s the chemical reaction to reduce the phosphorus content in molten steel. Phosphorus is one of the harmful impurities in steel. Steel with too much phosphorus, when used at room temperature or lower, is prone to brittleness, which is called "cold brittleness". The higher the carbon content in steel, the more serious the embrittlement caused by phosphorus. Generally, it is stipulated that the phosphorus content of ordinary steel does not exceed 0.045%, and high-quality steel requires less phosphorus.

6. Electric furnace bottom blowing electric furnace bottom blowing

Blow N2, Ar, CO2, CO, CH4, O2 and other gases into the molten pool in the furnace through the nozzle placed at the bottom of the furnace to accelerate the melting and promote the metallurgical reaction process. The use of bottom blowing technology can shorten smelting time, reduce power consumption, improve dephosphorization and desulfurization operations, increase the amount of residual manganese in steel, and increase the yield of metals and alloys. And can make the molten steel composition and temperature more uniform, thereby improving steel quality, reducing costs, and increasing productivity.

7. Melting period

The melting period of steelmaking is mainly for open hearth and electric furnace steelmaking. The melting period of electric arc furnace steelmaking starts from the time of electrifying to the time when all the accompanying materials are melted, and for open hearth steelmaking, it is called melting period from the end of hot metal mixing to the end of furnace burden melting. The task of the melting period is to melt and heat up the charge as soon as possible, and make the slag in the melting period.

8. Oxidation period and decarbonization period

The oxidation period of ordinary power electric arc furnace steelmaking usually refers to the process stage from dissolution of the charge, sampling and analysis to the completion of the oxidation slag. Some think it started from blowing oxygen or adding ore to decarbonize. The main task of the oxidation period is to oxidize the carbon and phosphorus in the molten steel; remove the gas and inclusions; make the molten steel uniformly heated. Decarburization is an important process in the oxidation period. In order to ensure the purity of steel, the amount of decarburization is required to be greater than about 0.2%. With the development of refining technology outside the furnace, most of the oxidation refining of the electric arc furnace is moved to the ladle or refining furnace.

9. Refining period

The steelmaking process uses slagging and other methods to select some elements and compounds that are harmful to the quality of steel into the gas phase or discharge or float into the slag through chemical reactions, so that they are excluded from the molten steel. The continuous casting machine discharges the billet.

10. Restoration period

In ordinary power electric arc furnace steelmaking operations, the period from the completion of slagging at the end of oxidation to tapping is usually called the reduction period. Its main task is to create reduced slag for diffusion, deoxidation, desulfurization, control of chemical composition and temperature adjustment. High-power and ultra-power electric arc furnace steelmaking operations have canceled the reduction period.

11. Refining outside the furnace

The steelmaking process in which the molten steel initially made in a steelmaking furnace (converter, electric furnace, etc.) is transferred to another vessel for refining is also called secondary metallurgy. Therefore, the steelmaking process is divided into two steps: primary smelting and refining. Primary refining: The charge is melted, dephosphorized, decarburized and main alloyed in a furnace with an oxidizing atmosphere. Refining: Degas, deoxidize, desulfurize, remove inclusions and fine-tune the composition in a container of vacuum, inert gas or reducing atmosphere. The advantages of dividing steelmaking into two steps are: it can improve the quality of steel, the steelmaking workshop can shorten the smelting time, simplify the process and reduce the production cost. There are many types of out-of-furnace refining, which can be roughly divided into two types: out-of-furnace refining under atmospheric pressure and out-of-furnace refining under vacuum. According to different treatment methods, it can be divided into ladle processing type furnace refining and ladle refining type furnace refining.

12. Molten steel stirring

The stirring of molten steel during the refining process outside the furnace. It homogenizes the composition and temperature of molten steel and can promote metallurgical reactions. Most metallurgical reaction processes are phase interface reactions, and the diffusion rate of reactants and products is the limiting link of these reactions. When molten steel is in a static state, its metallurgical reaction speed is very slow. For example, it takes 30 to 60 minutes to desulfurize molten steel in an electric furnace; while it takes only 3 to 5 minutes to stir the molten steel in furnace refining. When molten steel is in a static state, the inclusions are removed by floating upwards, and the removal speed is slow; when the molten steel is stirred, the removal speed of the inclusions increases exponentially and is related to the stirring strength, type, and characteristics and concentration of the inclusions.

13. Feeding wire in ladle

Feed the steel ladle with deoxidation, desulfurization and fine-tuning powders, such as Ca-Si powder, or directly fed into aluminum wire, carbon wire, etc., to deep desulfurize, calcium and fine-tune the molten steel into the steel ladle The method of carbon and aluminum components. It also has the function of cleaning molten steel and improving the shape of non-metallic inclusions.



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How to Choose Cardan Shaft?

The choice of coupling mainly considers the speed of the required transmission shaft, the size of the load, the installation accuracy of the two connected parts, the stability of rotation, the price, etc. We should refer to the characteristics of various couplings, and choose a suitable coupling joint. The following points can be considered when making specific choices:

1. Due to manufacturing, installation, load deformation and temperature changes, it is difficult to maintain strict and precise alignment of the two shafts after installation and adjustment. There is a certain degree of displacement in the X and Y directions and the deflection angle CI. When the radial displacement is large, you can choose a slider coupling, and when the angular displacement is large or the connection of two intersecting shafts, you can choose a universal shaft. When the two shafts produce a large additional relative displacement during the working process, a flexible coupling should be used.

2. The working speed of the coupling and the centrifugal force caused by it. For high-speed transmission shafts, couplings with high balance accuracy, such as diaphragm couplings, should be used, rather than eccentric slider couplings.

3. The size and nature of the torque to be transmitted and the requirements for the function of damping vibration. For example, gear couplings can be used for high-power and heavy-duty transmission. For severe impact loads or transmissions that require the elimination of shaft torsional vibration, tire couplings can be used. Most couplings have been standardized or standardized. The designer's task is to choose, not design. The basic steps for selecting a coupling are as follows:

According to the size of the transmission load, the shaft speed, the installation accuracy of the two parts connected, and referring to the characteristics of various types of couplings, a common type of coupling is selected. The following points can be considered in the specific selection:

1) The size and nature of the torque to be transmitted and the requirements for the buffer and vibration reduction function. For example, for high-power and heavy-duty transmissions, gear couplings can be selected; for transmissions that require severe impact loads or to eliminate shaft torsional vibration, tire couplings and other couplings with high elasticity can be selected.

2) The working speed of the universal joint shaft and the centrifugal force caused by it. For high-speed transmission shafts, couplings with high balance accuracy, such as diaphragm couplings, should be used, rather than eccentric slider couplings.

3) The magnitude and direction of the relative displacement of the two axes. When it is difficult to maintain strict and precise alignment of the two shafts after installation and adjustment, or when the two shafts will have a large additional relative displacement during the working process, a flexible coupling should be used. For example, when the radial displacement is large, you can choose a slider coupling, and when the angular displacement is large or the connection of two intersecting shafts, you can choose a Cardan shaft.

4) The reliability and working environment of the universal joint shaft. Generally, couplings made of metal elements that do not require lubrication are more reliable; couplings that require lubrication are easily affected by the perfect degree of lubrication and may pollute the environment. Couplings containing non-metallic components such as rubber are sensitive to temperature, corrosive media and strong light, and are prone to aging.

5) Manufacturing, installation, maintenance and cost of couplings. Under the premise of meeting the convenience of use, couplings with convenient assembly and disassembly, simple maintenance and low cost should be selected. For example, rigid couplings are not only simple in structure, but also easy to assemble and disassemble, and can be used for low-speed, rigid drive shafts. General non-metallic elastic element couplings (such as elastic sleeve pin couplings, elastic pin couplings, plum-shaped elastic couplings, etc.), due to their good comprehensive capabilities, are widely used in general medium and small power transmission.

If you are interested in our Cardan shaft, please contact me.
Email: marketing2@hanrm.com; Whatsapp / Wechat: +8618392033938.

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Cardan Shaft Assembly and Routine Maintenance

Analysis of the Swing Angle of Cardan Shaft in Operation

Cardan Shafts Assembly and Daily Maintenance

Material Selection of Rolling Mill Rolls

An Effective Way to Reduce Mill Roll Consumption

Development of High-Speed Steel Rolls

How are the Rolls Classified by Material?

Design of Mill Rolls for Rolling Mill and Material of Rolls

The Cause of Rolling Mill Rolls Breakage