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!

How to install wind power turntable bearing? Briefly describe the installation points and precautions

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In recent years, the clean energy represented by wind power is developing rapidly, which will play a positive role in alleviating energy pressure and environmental pressure. Wind power generation equipment generally has long working hours and harsh operating environment, so the performance requirements of its own bearings are higher. Turntable bearing is one of the main components of wind power generation equipment. It is a kind of large bearing with special structure that can withstand comprehensive load. So, how to install wind power turntable bearings? What are the key points and matters needing attention? Next, the constant crown Xiaobian for you to introduce.

Yaw Bearing of Wind Turbine Generator

1. Installation points of wind power turntable bearing

1, do a good job of inspection before installation

Check the installation surface of the host, pay attention to the strength of the supporting surface should be enough, the connection surface should be machined, the surface smooth. If the required flatness cannot be achieved through mechanical processing, it can be filled with materials with greater strength according to relevant standards, such as special plastics.

2. Pay attention to the load in the quenched soft belt area of bearing rings

The “S” marked on the end face of the ring is the quenched soft belt area of the ring of the wind power turntable bearing. During installation, pay attention to place the soft belt in the non-load area or non-regular load area (the plug hole is always located in the soft belt).

3. Radial positioning and preload

The bearing of the wind power turntable should be radial positioned during installation, the mounting bolts should be tightened cross-securely, and the rotation situation should be checked; When tightening bolts, ensure sufficient pretightening force, generally 70% of the upper yield limit of the bolt material; Spring washers should not be used for mounting bolts, but tempered flat washers should be used.
Turntable bearing
Second, attention to the installation of wind power turntable bearing

1. The finish and accuracy of the bearing mounting surface shall comply with the relevant regulations.

2. After the turntable bearing is unpacked, each joint surface should be cleaned to remove metal chips, paint, rust prevention agents, etc.

3. Clean the fitting part of the installation plane and check whether the seal is in the correct position.

4. In order to avoid deformation of the inner and outer rings of the bearing, it is strictly prohibited to weld the turntable bearing, otherwise it may be unable to be used.

5. The installation plane should be considered with convex and concave shoulder or positioning block for radial positioning.

6. The raceway and gear should be coated with a little grease to make the installation easier; After installation, ensure that the seals are compacting and smooth to avoid grease spill and leakage.

How to install wind power turntable bearing? The above is a specific explanation of the installation points and precautions for the small series. I hope to help you with your construction work. In order to achieve high energy efficiency of bearings for a long time, accurate matching, installation standards, timely maintenance and other work should be achieved. If you have other questions or needs, please feel free to leave a message or call us!

The principle and working principle of the slewing bearing

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Each component has its basic structural construction and related structural principles. The rotation support is the same as ordinary bearings. What is the structure of the bearing for the mechanical parts of the rotary support, and today, I will explain to you in detail here to explain the relevant principles and working principles of the transfer support.

1. The structure of the rotation support

1. Large size

The size is relatively large, and its diameter is usually 0.2-10 meters, and the diameter is greater than 40 meters.

2. Undertaking multiple aspects of load

Generally, we must bear the load of several aspects, not only to withstand axial force and radial force, but also to withstand larger torque. Therefore, a rotary support often plays the role of several ordinary bearing.

3. Slow operation speed

The operation speed is very slow, usually less than 50 rpm. In many occasions, the rotation support does not operate continuously, but only turns round trips in the angle, which is equivalent to the so -called “swing bearing”.

4. Manufacturing process

In terms of manufacturing processes such as materials and thermal treatment, there is a big difference between rotating support and rolling bearings.

5, with gear

Generally, the rotating support has a rotary gear and a sealing ring for dustproof, and the ordinary rolling bearings are not.

6. Different installation methods

The rotating branch is not covered on the core shaft like ordinary bearing and is packed in the bearing box. Instead, it is fixed to the upper and lower support.
Slewing ring
Second, the principle of rotation support

Rotary support is a large bearing that can withstand comprehensive loads, also known as “turntable bearings”. It mainly relies on lubrication and friction to achieve the effect of operation. The friction between the roller and the steel ring to achieve the purpose of operation is a combination bearings with high efficiency and high carrying capacity.

The turning branch support structure and working principle have been explained to the application of the reckless design structure, because the special nature of the bearing itself in many ways in various fields.

What is the working temperature of the adaptation of the slewing bearing

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Rotary support is a very important part of the machine. Basically, each machine is indispensable for this component. Because this part is fragile, it can also be regarded as a consumables. normal operation. Let ’s take a look at the work temperature of the adaptation of the rotary support.

Single -row ball rotary bearing 01 series
Rotate support can work normally at -300C ~+700C. If users need to adapt to lower or higher temperature reincarnation support, our company can make special design. The rotary support is used in a particularly harsh environment, such as marine climate, dust or grinding particles, sand, dust, cement, coal, etc. Special sealing rings, protective devices, and suitable fuel channels should be selected. Therefore, in order to enable your support to normal, I hope to do daily maintenance and maintenance.

Rotate the dental tooth surface should ensure that every 8-10 working days should be cleaned once every 8-10 working days. Do not mix with foreign bodies.

Features of Rotary support materials

The transfer branch is mainly composed of a circle, rolling body, holding frame, and sealing circle. Because different parts have a special effect in practical applications, they have different considerations in design selection

Under normal circumstances, the rotary supporting roller uses the overall hard -hard carbon chromium bearing steel. The rotary supporting circle uses the surface quenching hard steel. When the user does not have special requirements, it is generally made of 50MN steel, but sometimes in order to meet the needs of the host in some special applications, you can also choose the surface of the surface of other brands according to the specific conditions provided by the user. Her hard steel, such as 42CRMO, 5CRMNMO, etc.

Small and medium -sized rotary supporting forging uses circular or square rods as a blank material. The grain tissue and mechanical properties of stick materials are uniform and good, good in shape and size, and good surface quality, which is convenient for organizing mass production. As long as the heating temperature and deformation conditions are rationally controlled, there is no need for large forging deformation to forge with good forging. Ingots are only used for large forging. The ingot is a casting tissue with large columnar crystals and loose centers. Therefore, it is necessary to use large plastic deformation to break the cylindrical crystal into fine grains to compact loose and compact it to obtain excellent metal tissue and mechanical properties.

The rotary support is the structure of the main form, segmented, and isolation blocks. Among them, the overall and segmented shelves are manufactured for cast aluminum alloy No. 20 or ZL102. The isolation block is made of polyamide 1010 resin, ZL102 cast aluminum alloy and other manufacturing. With the continuous development of the material industry, the nylon GRPA66.25 is also promoted and applied in the design of the segmented maintenance.

The rotary support inheritance sealing is made of material -resistant rubber. The codes of the cover material and the supply status of the rough supply are according to the table. In the table, “T” indicates that the rough rough is supplied by the quality, and the “Z” indicates that the rough rough is supplied in a positive fire state.

The above is the introduction of the characteristics of the working temperature and the reckless support materials of the recking support. It is hoped that it can help everyone. Our company produces customized rotary support bearing, turntable bearing and other products. The bearing of the bearing can satisfy the guests. Our purpose is to solve problems, create value, and be valuable companies for customers! The constant crown bearing, the future of intelligence, and only work hard for the high -quality rotation support!

How to disassemble the large -slewing bearing? Four methods help 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 bearing.

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 leave a message or call us, we will serve you wholeheartedly

The special slewing bearing for Crane was successfully completed and delivered

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Recently, our company (Luoyang Hengguan Bearing Technology Co., Ltd.) has customized the special slewing ring bearings for cranes for a ship management company in Indonesia. It took 35 days of overtime production process, and the quality and quantity have been successfully completed and delivered to buyer.
the
Crane is a foreign word, English is crane, also known as marine crane, marine crane, is a large deck machinery on board, it is a kind of equipment for loading and unloading cargo on ships, hydraulic crane is a commonly used on ships Loading and unloading equipment. At present, our company has provided replacement slewing ring bearing products and services for: MITSUBISHI (Mitsubishi), TSUJI (tsuji industry), FUKUSHIMA (Fukushima), MacGregor, ROBALLO and other crane brands.


Assembly site The drawing model of the crane slewing ring bearing is: 62M3937.05.631, which is a single-row four-point ball slewing ring with internal teeth, and its shape parameters are 3078*2596*170, which is a common crane bearing structure. The shipowner plans to replace the large bearings of the two gram cranes. When the ship entered the port of Shanghai, China, it made a plan for overhaul and replacement of the bearings. Since the ship is open all year round, the detailed parameters of the large bearings will be confirmed after the ship berths and unloaded. After the cargo is delivered, the next voyage will start, and the round trip will take about 35-45 days; therefore, the shipowner requires that the bearings must be sent to the destination port in Shanghai within 35 days for seamless connection, so that the ship can be replaced in time after arriving at the port. , Time is money, we will be more valuable if we compete for points and create value for customers!
The delivery site The vivid and real cases again and again are the better answers for Hengguan people to repay the society. Luoyang Hengguan Bearing, as a member of the traditional manufacturing industry, but we have tried our best to abandon the traditional industrial thinking, not self-centered, not technology-centered, not product-centered; but customer-centered, service-oriented As the center; user-oriented, market demand as the core; establish brand strategic thinking, only in this way can we develop for a long time and become stronger day by day! Choose Hengguan to keep you worry-free! Come on, join us, we hope you will be a participant in our next successful case!

Low noise Ct scan slewing bearing complete completion

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Recently, Luoyang Hengguan Bearing Technology Co., Ltd. (hereinafter referred to as: Hengguan Bearing), which is a low -noise rotation support for a large medical equipment manufacturer in South Korea, has successfully went offline and all meet the requirements of the customer’s use.

The low noise rotation support bearing is supported on the CT machine. The ordering party requires that the noise must be controlled within 60 decibels, otherwise it will be rejected. This product plan begins with the inquiry from the Ministry of Foreign Trade of our company. After several rounds of negotiations and discussions, in -depth understanding of customer use conditions and requirements, through video conferences, accurately understand the pain points and demands of the client, and then combine our technical staff of our company. Professional research and judgment, signed this order after half a year.

Slewing ring
After receiving the order, our Si immediately arranged a high -quality forging material to strive to grasp the quality barrier from the source. First of all, the top priority of these products is how to control the noise and noise reduction is Guan Jian. Our technical staff fully combines professional skills and practical experience, formulated a complete processing process, and marked the main points that should be paid attention to in each process. The bearing rolling road is a very important process during the bearing processing process, which is related to the life, performance, accuracy, and stability of a set of bearing. Followed by the batch of low -noise rotary support for the bearing, it is vertical installation. In order to ensure the smooth rotation, our company specially customized a batch of overall nylon maintenance racks. Third, our company has made special improvements in maintaining the shelf, which can greatly reduce operating noise and ensure that the operating noise is controlled within 60 decibels. (Popularization of common sense: When we usually talk normally, the sound intensity is about 80 decibels)


After a series of tight and orderly processing and production, the batch of products are successfully completed and offline. After testing, all requirements were within the scope of the drawing of the guests, and the Henglee challenged again! The important thing is that we keep our promises and realize the customer’s demands. We believe that in the future, we will export more high -quality rotary support for the bearings, go to the world, carry forward the Chinese manufacturing industry, promote the spirit of the craftsmen of the great powers, and let the world fall in love with Chinese manufacturing!

High speed and silent slewing bearing for CT scanner machine is successfully completed

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igh speed and silent slewing bearing for CT scanner machine is successfully completed

 

Recently, the high-end slewing bearing for medical CT machine designed and produced by our company for customer from South Korea has been successfully rolled off the production line, and all the indicators of the finished product have passed the inspection.

For the CT machine special slewing bearing, the South Korean CT machine manufacturer and us communicated for more than a month of full technical details , and calculated the bearing capacity, service life and noise value according to customer requirement.

slewing bearing

This product has an outer diameter of 990mm and an inner diameter of 820mm. It is a toothless four-point contact ball slewing bearing structure with P5 accuracy. It is a high-end precision slewing bearing; and because it is medical, it has extremely high requirements for noise reduction.
According to the actual working conditions of customers, our technical engineers actively improve the product processing technology, and strive to make products that meet the actual needs of customers. First, the 42CrMo quenched and tempered material is used to make the material performance better and more stable, which guarantees the product quality from the source; secondly, the product raceway and appearance are comprehensively polished to ensure high product precision; thirdly, for the product’s silent requirements, A special segmented nylon cage device is used to lock the ball in the cage pocket while ensuring that the steel ball can rotate freely, thereby reducing the noise impact caused by the free movement of the cage in the raceway. Reduce rotating noise. Through the above efforts, we ensure that the finished products of the slewing ring meet various technical requirements.

After the finished product came out, after trial assembly test, it has fully met the requirements of the confirmed drawings of both the customer and us, and the rotation is flexible and light, and the rotation is silent. Starting torque is less than 70Nm, running torque is less than 30Nm and the noise value is less than 60dB 1m.

The vision of “Let the world fall in love with Made in China is not only a slogan, but also implemented in practical actions. It requires countless Chinese companies to constantly challenge themselves technologically and seize the right to speak for China in the core field of manufacturing. We Hengguan people carry this great dream and actively practice it! The road is long and long, Hengguan people will persevere in pursuit! May you and I walk along this great journey.