slewing bearing computing and selection influencing factors

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Rotary support, as an important part of the engineering structure, plays an important role in ensuring the stable operation and safe use of the project. Calculation and selection of rotation support is a key step to ensure the stability of the project. It is necessary to comprehensively consider many factors to meet the design requirements and the actual situation of the engineering.

1. The principle and method of the computing of the rotation support

Calculation of rotating support involves multiple disciplines such as structural mechanics, material mechanics, and friction. The following key factors need to be considered during the calculation process:

1.

Considering the use of the project, including static loads and dynamic loads, such as self -weight, wind lane, earthquake, etc.

2. Deformation

According to the deformation of the structure, the position and quantity of the rotation support are determined to ensure the normal deformation of the structure.

3, friction

The rotating support is usually transmitted by the friction and deformation, and the size and distribution of friction need to be calculated.

4. Abrasion

Considering long -term use, friction may cause the wear of the support, and the degree of wear needs to be predicted and repaired or replaced.

The calculation method usually uses limited element analysis, analysis calculation and other means, combined with the actual situation and material characteristics of the project, to obtain appropriate support parameters.
Slewing ring
Second, the choice and design of the rotary support

In the selection and design process of rotating support, we need to comprehensively consider factors such as structural characteristics, load requirements, and environmental environment:

1. Load requirements

According to engineering loads and use requirements, choose the types and specifications of appropriate rotation support to ensure that they can bear the expected load.

2. Use environment

Consider the environment where the support is located, such as temperature, humidity, corrosion and other factors, choose the appropriate materials and lubrication methods to extend the service life of the support.

3. Structure layout

According to the structure layout and deformation requirements of the project, the layout and quantity of the support are determined to ensure the reasonable distribution of the deformation of the structure.

4. Maintenance

Consider the difficulty of maintaining the maintenance and maintenance of the support, and choose the design plan that is convenient for maintenance and replacement.

Calculation and selection of rotation support is an important part of ensuring the stable operation of the project. When calculating, it is necessary to comprehensively consider factors such as loading, deformation, and friction, and select appropriate calculation methods and engineering parameters. In the process of selecting and designing, it is necessary to combine the characteristics of the project and the environment to ensure that the renewal support can meet the project requirements and ensure the safe and stable operation of the project. With the continuous advancement of technology, the calculation and selection method of reincarnation will continue to improve, providing more reliable support for the design and construction of the project.

What is the slewing bearing coefficient? Impact and processing method

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The slewing bearing  coefficient is a vital parameter in the field of engineering. Single -row rotating support is a key component widely used in various industrial machinery and equipment. It is responsible for supporting and turning important mechanical components. The rotating support coefficient directly affects the operating efficiency, accuracy and life of mechanical equipment. This article will explore the significance, influencing factors, and how to optimize the performance of the rotary support to improve the performance of mechanical equipment.

1. What are the friction coefficients of the rotation support

The concept of the slewing bearing coefficient: The friction coefficient refers to the ratio of friction between the relative motion between the two objects and the pressure of the contact surface perpendicular to the contact surface of the two objects. In the rotary support, the friction coefficient affects the force required for the support during the rotation process and the size of friction. The high friction coefficient can cause greater friction loss in mechanical equipment, which affects the rotation efficiency and heat of the equipment.

Second, the rotary supporting friction coefficient influencing factors

The rotating support coefficient is affected by various factors. The choice of materials is one of the main factors that determine the friction coefficient. The friction coefficient between different materials is very different, so you must choose the right material carefully when designing the backup. The surface roughness and lubrication conditions will also affect the friction coefficient. The smoother surface and effective lubricant can reduce the friction coefficient, thereby reducing friction loss.

3. Method of handling the rotary supporting coefficients

In practical applications, optimizing the rotating support coefficient is critical to improving the performance of mechanical equipment. First of all, reducing the friction coefficient can reduce the energy loss of mechanical equipment during operation, improve rotation efficiency, thereby saving energy and reducing operating costs. Secondly, optimizing the friction coefficient can reduce the wear of support, extend the service life of mechanical equipment, and reduce maintenance costs.
Back support 1. Select the right material

According to the specific application scenarios and working conditions, select materials with lower friction coefficients, such as high -performance polymer materials or coating materials.

2. Surface treatment

By surface processing technology, improve the smoothness of the support surface, reduce surface roughness, and reduce the friction coefficient.

3. Lubricant selection

Select the lubricant suitable for working conditions to maintain the lubrication state of the support surface, and reduce the friction coefficient and wear.

4. Optimization of load distribution

Reasonable design support structure, balanced load distribution, avoid local overload, and reduce friction.

5. Temperature control

Properly control the working temperature of the support to avoid increased friction coefficient caused by overheating.

The slewing bearing coefficient is an important parameter that affects the performance of mechanical equipment. By selecting the appropriate material, optimizing surface treatment, lubricant selection, and load distribution, we can effectively reduce the friction coefficient and improve the operating efficiency and service life of mechanical equipment. In the future engineering design, we should continue to pay attention to the research of the rotary support coefficients, continuously optimize the design, promote the development of engineering technology, and provide more efficient and reliable machinery and equipment for all walks of life.

Detailed explanation of the selection method of the slewing bearing?

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Slewing bearing is a key mechanical element that is widely used in various engineering projects and mechanical equipment. It carries important rotation functions and is essential for the safety and reliability of the project. When choosing a rotary support, multiple factors need to be considered, including bearing capacity, size, material, rotation stability, etc. This article will introduce some key considerations and methods around the rotary support.

Turning branch selection method

1. Knowledge of mechanical equipment

The selection of the re -supporting support should start with a full understanding of the demand for engineering projects or machinery and equipment. In order to determine parameters such as the required bearing capacity, rotation speed, and working environment are the basis of selection. These parameters will directly affect the size and material selection of the rotary support.

2. Carrying ability

According to the required bearing capacity, choose the appropriate type of rotation support. There are various types of rotation support, including single -row ball -type rotary support, double -volleyball rotary support, rolling needle, etc. Each type has its unique characteristics and scope of application. According to specific engineering needs and equipment requirements, choose the right type.
Slewing ring
3. Size and structure

The size of the rotation support depends on the bearing capacity and installation space. The outer diameter, inner diameter, height, and corresponding installation of the pores of the re -supporting support are needed. At the same time, it is necessary to determine the structural form of the rotating support according to the layout and structural characteristics of the equipment, such as fixed, self -in -law, and outer tooth type.

4. Choose the right material

The selection of materials for rotating branches is directly related to its durability and reliability. Common materials include steel, alloy steel and stainless steel. According to the characteristics of the working environment, select materials with good corrosion resistance and wear resistance to ensure the long -term stable operation of the reckless support.

5. Performance and quality assessment

Evaluation of performance and quality. During the selection process, the performance indicators of rotating stability, friction coefficient, and noise level of rotation support are needed. In addition, it is also important to understand the reputation and quality management system of the turning branch. Choosing an experienced and good reputation manufacturer can ensure the quality and reliability of the return support.

When conducting the selection type of the rotary branch, it is recommended to seek the help and suggestions of professional engineers or manufacturers. They have rich experience and professional knowledge of the rotary branch, and can provide you with selection according to specific needs

What does the overturning moment of the slewing bearing mean? What are the factors that affect the overturning moment?

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As an important load-bearing element of mechanical equipment, the performance of slewing bearing is directly related to the safety and service life of the equipment. The overturning moment of the slewing bearing is one of the important indicators to evaluate its bearing capacity. This article will focus on the topic of the overturning moment of the slewing bearing and discuss it from three aspects.
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1. What is the overturning moment of the slewing bearing?
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The overturning moment of the slewing bearing refers to the larger overturning moment that the slewing bearing bears when it is working, usually expressed in N·m. The overturning moment of the slewing bearing refers to the larger torque that the slewing bearing can bear at a certain angle, and it is also the larger moment that the mechanical equipment can bear when it is working. The overturning moment determines the carrying capacity and working efficiency of the mechanical equipment. .
Slewing ring
2. Factors affecting the overturning moment of the slewing bearing
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1. Support quality
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The quality of the slewing bearing is one of the key factors affecting its ability to withstand overturning moment. High-quality supports typically employ materials and precision manufacturing processes that provide greater structural strength and stability, allowing them to withstand greater overturning moments.
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2. Support structure
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Slewing bearings with different structures exhibit different performances when bearing overturning moments. The design and construction of the supporting structure determines its ability to resist overturning. For example, adopting a wider support base, increasing the number of support bearings, or using reinforced structural supports can improve its ability to withstand overturning moments.
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3. External load
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The external load on the support is an important factor affecting its overturning moment. When the external load increases, the moment on the support increases accordingly, resulting in an increase in the overturning moment. Therefore, when designing and using slewing rings, the required load-bearing capacity must be considered to ensure that it will not overturn when subjected to the expected load.
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4. Working environment
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The working environment where the support is located will also have an impact on its carrying capacity. For example, severe operating conditions, such as high temperature, low temperature, humid or corrosive environment, may reduce the material strength of the bearing or cause the performance of the lubricant to decrease, thereby reducing the bearing capacity and anti-overturning ability of the bearing.
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To sum up, you should have a general understanding of the meaning of the overturning moment of the slewing bearing. Support quality, structural design, external load and working environment are important factors that affect the overturning moment of the slewing bearing. By selecting high-quality supports, optimizing structural design, reasonably predicting external loads, and adapting to different working environments, the overturning moment bearing capacity of three-row ball, double-row ball, and single-row ball slewing rings can be improved to ensure their stable operation and safety performance.

slewing bearing 

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is a common mechanical parts that support and rotate large structures, such as bridges, buildings, and wind turbines. Rotary support is composed of parts of the internal and external ring, rolling body, maintenance frame and sealing circle. The choice of material is essential for its performance and life. In this article, we will explore the materials and characteristics of common rotation support in order to better understand this important mechanical parts.

The material of the backbone support

1. Carbon steel

Carbon steel is a common rotary support material. Its main feature is low price, high strength, easy processing and heat treatment. Carbon steel rotation branches are suitable for small and medium -sized structures, such as excavators, cranes, etc. However, carbon steel is easy to rust and requires regular anti -rust oil to extend the service life.

2. Alloy steel

Compared with carbon steel, alloy steel rotation branches have higher strength and better corrosion resistance. Its additional elements can improve its hardness, toughness and abrasion resistance, and make it more suitable for large structures with high load and high -speed rotation, such as cranes and building rotation towers. The price of alloy steel rotation support is relatively high, but its long life and less maintenance needs can reduce the overall cost in long -term use.
Rotary support 3. Stainless steel

The stainless steel rotation support has good corrosion resistance and high strength. It is suitable for the structure of working in a humid and corrosive environment, such as offshore wind turbines and port cranes. Compared with carbon steel and alloy steel, stainless steel rotation branches are higher, but their long -term durability and less maintenance costs make it an irreplaceable choice under some special occasions.

4, cast iron

The cast iron rotation support has abrasion resistance and corrosion resistance, and is suitable for the structure of heavy load and slow rotation, such as bridges and buildings. Its price is relatively low, but its strength and toughness are not as good as steel, so it is only applicable to some specific applications.

In short, the selection of materials for rotating support should be determined according to factors such as its application environment, load and rotation speed. When selecting materials, you need to consider the strength, wear resistance and other factors of the material. Different materials affect the performance and life of the bearings. Be careful when choosing

Analysis of the reasons for the phenomenon of the slewing bearing

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During the use of construction machinery equipment, various problems can not be avoided. Sometimes the turntable bearings suddenly break, which will not only affect the production progress, but also cause huge losses, and may also danger. What is the reason why Hengguan Xiaobian will analyze the reasons why the lower turntable bearing broken phenomenon will be analyzed today.

Reasons for the break of the rotor bearing
1. Material problem

The phenomenon of rotor bearing breaks can be said to be a major quality problem of this part. The rotor bearing breaks refer to the inner and outer ring of the inner and outer circles of such bearing, mainly because the tensile strength, yield strength, and impact toughness of the material are not up to the standard. Mechanical properties of making such bearing materials. The main material of the rotor bearing is carbon structure steel. 50mn and 42CRMO are commonly used in this industry. 50mn mechanical performance: (1) tensile strength σb (MPA): ≥645 (66); (2) Lading strength σs (MPA): ≥390 (40); (3) elongation rate Δ5 (%): ≥13: ≥13 ; (4) Sectional contraction 断 (%): ≥40; (5) impacting AKV (J): ≥31; (6) impact tough value αKV (j/cm2): ≥39 (4). When the turntable bearing work at a normal use temperature (-30 ° C to 70 ° C), it can basically be sure of the factors of the material problem.

2. Processing heat treatment

The production and processing process needs to be heat treatment of the rolling roads. The heat treatment fails, resulting in low surface hardness. The hardness layer penetrates into the wall of the rotary bearing structure or reaches the rotary supporting wall, which changes the mechanical performance of the internal and external circles. The value becomes smaller and the material becomes crispy.
Rotor bearing
3. Design structural problem

After the design structure of the turntable bearing is caused by heat treatment, the quenching layer is equivalent to the design thickness of the inner and outer circle. At this time, the material anti -tensile strength and the impact toughness value is small, resulting in a break, but this possibility accounted for a low proportion of the broken accident.

There are many reasons for the phenomenon of rotor bearing. When using an unspoken ring forged, the quality of the bearing material is unqualified. Bearing manufacturers, so that the material and design of the bearing can be guaranteed.

Detailed explanation of how to prevent slewing bearing quenching cracks?

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slewing bearing t is widely used in large -scale rotary devices in engineering, mining, wind power, oil, chemical industry and other industries. When the rotary support is running, its rail structure is the focus of guaranteeing normal operation. The orbit of the reincarnation support is processed by quenching. Today I will tell you how to prevent quenching cracks.

How to prevent quenching crack

1. Choose a reasonable quenching method

According to the structure and characteristics and technical requirements of the rotor bearing, the correct and reasonable selection of structural design status and the quality of workers can be greatly reduced or no quenching accidents can be greatly reduced.

2. Arrange the process line reasonably

Once the material, structure and technical conditions of the rotation support are determined, the craftsman must conduct a process analysis to determine the reasonable process line. Correctly arrange the order of preparing processing, thermal treatment and heat processing. This is the main effective way to prevent the tendency of rail cracking after thermal treatment.
Rotary support 3. Properly determine heating parameters

In the heating production of the rotary support rail, improper heating is the main factor that causes the quenching and reincarnation support. Therefore, heating parameters such as heating medium, heating speed, heating temperature, and thermal insulation time should be correctly selected and designed.

4. Other measures to prevent quenching cracks

After quenching, it is recovered after quenching. The thin -walled treatment of complex parts of the shape can also effectively prevent the production of cracks.

5. Selection of quenching medium

The selection of quenching medium should be comprehensively considering the rotary support for the quenching method: including quenching groove liquid, stirring speed, flowing direction, and solution concentration. As well as the characteristics of the rotation support, the chemical ingredients of the steel, the section size of the workpiece, the geometric shape, the surface roughness and the surface state, the arrangement status and density of the arrangement during the quenching of the road.

I introduced so much about how to prevent quenching cracks, I hope to help you! Whether the rotating support can work normally, it is the key to prevent quenching cracks!

Shield machine slewing bearing

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The diameter of shield machine slewing bearing varies from 2.5 meters to 6 meters, and some diameter is larger. This kind of bearing works in very harsh conditions, with large bearing load, strong corrosion resistance and short life.

Shield tunneling machine is the main construction machinery in shield tunneling method, which must have high reliability and can work stably and reliably. The main bearing of large shield machine mainly adopts three-row roller slewing bearing, which needs to bear large axial force and overturning moment in the working process, as well as certain radial force. The loading situation is complicated, and it is easy to produce large deformation, which affects the construction safety of shield machinery.

Features and applications of turntable bearing

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The turntable bearing is an important part of many automobiles and machine tool equipment. There are multiple models of the turntable bearings. There is no need to support the body in the work. As long as the gap between the support to the face and the work surface is maintained, the turntable can be balanced. It can be selected as needed, and the scope of use is also very wide. Generally applicable to the precision transmission parts in the machine, in which aspects of the specific turntable bearings are used. Essence

1. The characteristics of the rotor bearing

The rotor bearing is generally suitable for tolerance of radial load (rotating torque) greater than 10N.M, and axial load does not exceed 20n.m. The roller and steel of the roller of the turntable bearing are carburized on the surface, and the surface hardness is high, which is suitable for occasions with impact loads.

The rolling roads are generally produced in precision processing methods, and their diameter can be selected as needed; inner and outer circles are demolished to facilitate maintenance and replacement. There are multiple models in the rotor bearing, which can be selected as needed. The turntable bearing is an overall component composed of high -precision, high -performance steel ball and graphite, and is mainly used in precision rotation instruments.
Rotor bearing
Second, the application of the rotor bearing

The turntable bearing is a high -precision, large carrying capacity, high stability, and high stability. It is widely used in the field of aerospace industry, petrochemical production and mechanical manufacturing industry. The roller of the rotor bearing is precisely processed, so there is no special requirements for the material. According to the application field, you can choose different brands of materials. The scope of the rotor bearing is wide, which is generally suitable for the precision transmission parts in the machine.

The characteristic of the rotor bearing is determined by the structure of the bearings. There is only one set of support in the entire structure. It does not require supporting body in the work. balance.

How to disassemble the large -scale rotor bearing? Four methods teach you

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The turntable bearing is a large bearing with a special structure. It can withstand a comprehensive load such as a large axial load, radial load, and overturning moment. It also has a variety of functions such as support, rotation, transmission, and fixation. Applications in the seed industry or equipment are widely used. Many friends are not very familiar with how to disassemble large -scale turntable bearing. Next, Hengguan Xiaobian will introduce the four commonly used bearing disassembly methods for everyone.

1. Tapping and disassembling method

In many disassembly scenarios, the knocking method will be used. In short, using a copper stick or other soft metal materials less than the inner diameter of the bearing to the shaft end (if the bearings are at the end of the axis), use the handhand to knock on the bearing in the bearing. The circle slowly falls off. This method is simple and easy to do. The disadvantage is that it is easy to cause damage to the bearings. Therefore, you should be careful when operating. You need to pay attention to the rolling of the bearing and keeping the rack.

Second, pull out the disassembly method

This method needs to use a specialized tool to generate a uniform pull force by rotating the handle to pull out the bearings. This method is better to protect the bearing, and you need to pay attention to the following points when operating:

1. To hook the hook of the stretch to hold the inner ring of the bearings, if the accidental hook may cause excessive or damage to the bearing loosening on the outer ring.

2. To make the screw rod on the center hole of the bearing, pay close attention to the force of the bearings during the process of pulling out to avoid damaging the hooks and bearings.

3. Pay attention to prevent the hook from slipping, the corner of the bend of both feet should be less than 90 °

Third, pressure disassembly method

This method needs to use the pressure machine to press the bearing. The working process is smooth and reliable, and generally does not damage the machine and bearings. Pay attention to the effort point of the pressure machine should be on the center of the axis, and cannot be compressed. Common pressure machines are manual, mechanical or hydraulic type.

Fourth, heat treatment and disassembly method

The bearing for disassembling tightness can be performed first, and then pulled out with the help of the tension. Generally, the oil that is heated to about 100 ° C is poured on the bearing to be demolished. After the bearing ring is heated and expanded, the bearings are evenly pulled out with the help of a dedicated tape. This method should do a good job of self -protection and oil body recycling to prevent scalding; wrap the shaft body before heating, so that the bearing can not disassemble the bearings caused by heating and expansion.

The above is the specific introduction of how to disassemble the large -scale turntable bearing, I hope to help you. Luoyang Hengguan Bearing Technology Co., Ltd. is a comprehensive physical enterprise integrating design, research and development, production, sales, and service. The product quality is guaranteed. If you still have other questions about bearing, you can give it. We will leave a message or call us, we will serve you wholeheartedly!