HGB delivery SE5 with 24V motor slewing drive to Canada

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On October 12, 2019, Luoyang Hengguan Bearing company delivery one set of SE5 with a 24V motor slewing drive to Canada by Express.

This slewing drive SE5 is used for a solar tracker system.

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When received the customer’s inquiry, we provide the customer with professional technical support to help the customer select the model of the slewing drive and confirm the parameters of the motor. Give customers a quote for express shipping costs. Customers give our service the highest appreciation. On the second day after receiving the customer inquiry, the customer places an order and pays.

We seek to be representative of China top quality machinery supplier.

Non-standard segment slewing bearing produced successfully

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Recently, our company (Luoyang Hengguan Bearing) delivered a non-standard segmented slewing bearing for a large-scale winding machine manufactured by a metallurgical company in Hunan. After the customer installed, the design intention of the slewing bearing was realized. Our company’s design capability and production capacity are highly appreciated.

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The outer diameter of the bearing is 2.1 meters, which is completely non-standard according to customer requirements. The customer initially consulted several slewing bearing manufacturers, but in view of the special requirements of the customer, no supplier can provide the solution. We received this consultation from our customers and quickly arranged technical engineers to connect with customers and provide detailed professional technical solutions. At first, customers wanted to use the traditional structure of the slewing bearing to achieve segmentation, opening, closing, turning, etc., but considering that one of the ferrules is not a complete circle, there is a 135 degree gap, so the rolling body will fall off as the ferrule rotates, and the customer’s intention of use cannot be realized. After communicating with the customer, it is determined to be a fixed roller type sliding structure.

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The structure seems simple, but if you want to make several actions uniform and smooth, you need to control the details in design and production. Otherwise, it is easy to open and cannot be completely homing. After closing, the teeth and the circumference are not uniform, such as rotating abnormal sound and other issues. At the beginning of the design of the slewing bearing, through consultation with the customer many times, the general dimensions, structure and articulated form were determined. After the customer determined the plan, our designers deliberately went to the customer site to communicate with the other designers. On-site mapping the details of the program are determined one by one.

The key points of the product are: first, the deformation problem after cutting; second, the hinge connection model; third, the arc and the hole position, and the homing problem after the partial closure. For the deformation problem, our company selected 42CRMO quenching and tempering material, and after the processing (turning to process, hobbing processing), stress relief annealing to ensure small deformation after ferrule cutting. The bearing can not only ensure the rotation, but also can carry a large overturning moment, and the long-term use performance is unchanged; the cutting arc and position are referenced by the design software one by one, and processed by high-precision CNC boring and milling machine to ensure the dimensional accuracy.

For the homing problem after closing, we select both ends to make the positioning pin hole, to ensure the return to the original position after closing, and to ensure the gap of the teeth. After more than 30 days of intense processing, the product was successfully delivered to customers. At the end of the product, the end face jump is 0.1mm, and the radial runout is 0.15mm, which is very good for the customer’s intention.

The slewing bearing is proved by facts that Luoyang Hengguan Bearing has a strong design capability of non-standard custom slewing bearing, high level of professional processing and manufacturing capability. We HGB will insist to provide professional service and high-quality products to our customers.

How to solve the problem of large gap between the top ring and bottom ring of the excavator slewing bearing?

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Excavator is an indispensable mechanical device in the construction of today’s engineering equipment. Powerful robotic arms and buckets can excavate the earth and then load it into the transport vehicle. This series of operations are inseparable from the working device of the excavator. The important joint in the working device is the slewing bearing. The quality of the slewing bearing directly affects the normal operation of the excavator. During the daily use of the excavator, sometimes there is a problem that the upper ring and lower ring gaps of the excavator turntable are large, or the bearing is stuck and damaged. How can we use the maintenance to solve these problems?

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First, the reason and solution for the large gap between the top ring and bottom ring of the excavator slewing bearing

The reason for the large gap between the upper ring and lower ring sides of the excavator is that the lack of grease lubrication causes the rollers to become smaller when the wear is worn, the butter leaks out, and further causes wear, and then the excavator slewing bearing has a problem of large gap between upper ring and bottom ring. That is, the excavator turntable is disassembled, and then repaired, the roller is replaced and repaired, and the repaired excavator slewing bearing should be replaced in time.

Second, the other problems of the excavator slewing bearing and the maintenance

1. Teeth are broken

Broken tooth is another common problem of excavator slewing bearing. It should be stopped in time after the broken tooth, and repair and replacement should be carried out in time. The broken teeth of the excavator slewing bearing are mostly due to improper adjustment of the side gear of the large and small gears during installation, which does not meet the requirements. Causes the two gears to be misaligned during operation, causing broken teeth; or the meshing gap adjustment between the pinion and the pinion is not required as required, causing the pinion to become stuck when the meshing gear is engaged with the large gear toothing position during operation; The non-parallel axes and the slewing bearing mounting bolts are not tightly fixed, so that the large and small gears are poorly engaged and the teeth are broken.

The excavator slewing bearing should be repaired in time after the broken teeth appear. If it is repaired by the maintenance personnel, it must be replaced in time. In order to avoid the occurrence of broken teeth, maintenance should be carried out when the installation is used. The following points should be made: the backlash should be adjusted strictly according to the requirements; the meshing adjustment should be carried out with the small gear in the position where the green paint is applied, and the test should be carried out according to the requirements. Operation ensures that the two gear axes are parallel; tighten the bolts as required; operate in strict accordance with the operating procedures; ensure that the size gears are clean and check frequently.

2. Abnormal sound

The abnormal sound is also one of the common problems of excavator slewing bearings. Abnormal noise is an abnormal sound. It will have a certain sound when it comes to new products. It is normal, but it should be replaced in time when it lasts for a long time. Sometimes it is installed after installation. There will also be abnormal noise. In this case, it is necessary to check whether the installation is correct. The abnormal noise generated during the use may be the lack of grease in the raceway or the foreign matter mixed in the raceway. When the noise occurs, it is necessary to check the excavation in time. Whether the various structures of the slewing bearing are complete, and the fault is eliminated.

The above is the analysis of how to solve the problem of the upper ring and lower ring clearance of the excavator turntable. For the excavator slewing bearing, there will be many problems in the process of use, such as large gap, broken teeth or abnormal noise. These problems should be repaired or replaced in time. If you can’t solve them yourself, you must contact the manufacturer in time to provide professional guidance to avoid direct damage.

Composition and Selection of Wind Turbine Slewing Bearing

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Wind turbine slewing bearing is one of the important parts of the wind turbine. Wind turbine converts wind energy into mechanical energy by absorbing wind energy and then converts it into electric energy to realize wind power generation. Wind power system mainly includes main rotating system, pitch system, and yaw system. The components of each system basically contain slewing bearings, such as pitch slewing bearing, yaw slewing bearing, and the quality of wind power slewing bearings directly determines whether the wind power system can operate normally.

Excavator Slewing Bearing

1. Wind turbine slewing bearing composition

Wind power slewing bearing is a large slewing bearing, which consists of four parts: inner ring, outer ring, rolling element and isolation block. Different from ordinary slewing bearing, wind turbine slewing bearing needs to withstand greater torque, so each component should also be reinforced and processed so that they can meet the needs of the wind power system. After all, the cost of wind power generation is inherently high, and once replaced or repaired, it will cause great losses.

2. The characteristics of wind turbine slewing bearing

Usually, the use environment of wind turbine slewing bearing is bad, so the better structures and components are needed. therefore, the structure and component quality of wind power slewing bearings are good. But there will be damage inevitably. Once the slewing bearing is damaged, the replacement is not only costly but also delays power generation. Wind power generation is a continuous process, that is why wind power generation requires a high-life slewing bearing. Another major feature of wind turbine slewing bearings is high life.

3. The selection of wind turbine slewing bearing

There are many types of slewing bearings, such as double row ball slewing bearings, single row cross roller slewing bearings, three rows roller slewing bearings and ball and roller combined slewing bearings, etc. The selection of wind power slewing bearings is mainly three-row roller slewing bearing and cross roller slewing bearing, these two types slewing bearings have the high bearing capacity and can better meet the needs of wind power fermentation.

4. Wind power slewing bearing manufacturers

Since wind power slewing bearings are so important, we must pay more attention to the selection of wind power slewing bearing manufacturers. We must pay attention not only to the price but also to the manufacturer’s production qualifications. Is there any qualification and experience in producing wind turbine slewing bearings? How about the slewing bearing quality, etc. in order to ensure that the wind turbine slewing bearing can run for a long time.

In general, wind turbine slewing bearing is important components of wind power equipment, such as pitch bearings and yaw bearings. Wind turbine slewing bearing is generally used in harsh environments, so wind turbine slewing bearings are required to have better performance and longer life. The life expectancy is more important to choose a suitable manufacturer to make the wind turbine slewing bearing run for a long time.

How to deal with the abnormal sound of the crane slewing bearing?

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The crane belongs to a large hoisting machine. When the crane rotates the U-turn, the key bearing function is the slewing bearing. When the crane rotates, it bears a large steering force and load, and still can provide stable rotation. However, in daily use, sometimes there is abnormal noise or stuttering. What are the reasons for these phenomena? How can we handle it effectively?

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1.The reason of the abnormal sound of the crane slewing bearing.

1. Insufficient lubricating oil
Lubricating oil plays an important role in the rotation of the slewing bearing. Because the steering force is too large when the crane rotates, it is necessary to have lubricating oil for timely lubrication. If the lubricating oil is insufficient, it will cause a stuttering when rotating, and it will also make an abnormal sound.

2.Loose bolts
Loose bolts are also a major reason of the abnormal sound of the crane slewing bearing. Bolts are used to fix the components of the slewing bearing. Loose bolts will naturally cause abnormal sounds in the slewing bearing, and even damage the bearing and the machine. It is not simple problem of abnormal noise.

3. Track wear
The slewing bearing has a matching rotating track, and the track appears worn, which naturally causes abnormal sound of the slewing bearing of the crane.

4.The slewing bearing damage
Damage to the slewing bearing is a serious reason of abnormal noise. If the slewing bearing is damaged, it needs to be replaced or repaired in time, otherwise it will delay the construction progress.

5.Non-standard use
Due to overload or irregular use, the slewing motor is damaged or the rotating gearbox is damaged, resulting in abnormal noise in the slewing bearing.

2. The solution of the abnormal sound of the crane slewing bearing

1. Lubricating oil and non-standard use can be avoided in normal use and maintenance. Therefore, one of the first tasks to solve abnormal noise is to pay attention to the usual maintenance. When the lubricating oil is insufficient, add lubricating oil in time. The machine should be operated in accordance with the process specification to avoid delays due to low-level operation errors.

2. For the problem of loose bolts, it is necessary to strengthen the bolts in time. The problem of loose bolts is a relatively simple problem.

3. It is more troublesome to deal with the problem of track wear and damage of the slewing bearing. The principle of handling is to change a new one and not to use damaged bearings to avoid irreparable damage. For the slewing bearing, the slewing bearing can be repaired, or the new slewing bearing should be replaced in time.

In addition to daily maintenance and replacement of the slewing bearing, choose the appropriate model when selecting the slewing bearing, after all, the crane is not a small machine.

Successful Installation of Slewing Bearing for Shield Machine

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Recently, our company (Luoyang Hengguan Bearing) has successfully delivered the slewing bearing of the shield screw conveyor manufactured for Fuzhou Metro Construction Co., Ltd. The slewing bearing on the equipment is imported products with long production and long transportation time and high price. The construction time is limited. After many times of communication between the customer and us, in the end, the products are produced by our company and manufactured according to the slewing bearing physical drawing paper.

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In the early stage, our technicians went into the subway construction site and determined the product quality and accuracy requirements through detailed communication with the construction party on the product operating conditions, the performance of the main engine (screw conveyor) and the situation during operation. The product is installed vertically and is tilted during use. Because the screw is driven to transport the materials such as muck and gravel, and at the same time it need support the weight of the screw, it must withstand large radial force and overturn moment during work. The teeth of the outer ring of the slewing ring, as the transmission component, need to drive the screw with the materials such as muck and gravel at the same time.

Therefore, the tooth portion of the slewing bearing is subjected to a large driving force. It is very troublesome to disassemble the screw conveyor after entering the tunnel. Therefore, during the subway excavation process, the shield screw conveyor can not cause any errors.

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In order to ensure the wear resistance and smooth running of the tooth part, the tooth part is specially quenched, the tooth surface and the tooth root hardness are improved, and the tooth grinding process is performed at the same time to improve the tooth precision and the surface finish. Because the product is used vertically, in order to ensure that the rolling body can rotate evenly during the rotation process, the overall material cage is used to ensure the flexibility and stability of the rotation. This product belongs to high-precision single row cross roller slewing bearing, outer diameter 1306mm, model D1797/954.

Our company adopts 42CrMo material and the material has been quenched and tempered to improve material performance. In the processing, each process is strictly controlled, and the measuring tools are inspected to ensure the rigor of the process and the accuracy of the dimensions, lay a good foundation for the subsequent processes, and make a record at the same time, and finally completed successfully.

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In the finished product inspection, the bearing rotation is flexible, the inner and outer diameter dimensional tolerance is controlled within 0.08mm, the clearance is controlled within 0.09mm, the radial runout is controlled within 0.09mm, the end face of beating is controlled within 0.06mm, and the overall precision reaches P5. At present, the customer of this product has been installed and debugged successfully, and has achieved the same use of the original, and has been praised and praised by customers.

What are the Models and Characteristics of Cross Roller Slewing Bearings?

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Cross roller slewing bearing also known as cross roller slewing ring bearing, is mainly divided into 11 series, HJ series and 797 series slewing bearings. Compared with other slewing bearings, cross roller slewing bearing has small size, high precision grade, high rigidity and large load bearing capacity. Resistance to damage and other characteristics. It is often used in large-scale rotary devices such as bucket turbines, overweight transportation machinery, port machinery, mining machinery, park amusement machines, filling machines, construction machinery and missile launchers, which plays an important role in the rotary rotation of construction machinery products.

Single Row Cross Roller Slewing Bearing (11 series)

1. Cross roller slewing bearing model

Cross Roller Slewing Bearing 11 Seri00es
Cross Roller Slewing Bearing HJ Series
Cross roller slewing bearing 797 internal gear series
Cross roller slewing bearing 797 external gear series
Cross roller slewing bearing 797 non-gear series

Different cross roller slewing bearings are available in various types to meet different mechanical requirements. Hengguan bearing manufacturers can design according to customer’s specific requirements, manufacture and install according to actual conditions, focusing on customer needs.

2.The characteristics of the cross roller slewing bearing

The cross roller slewing bearing can be assembled in all directions of the main shaft, which is very convenient to use and can bear radial and axial loads at the same time, which simplifies the structure of the machine and reduces the weight of the mechanism. Cross roller slewing bearings have low grease consumption due to their high rotation efficiency and low heat dissipation. Moreover, it can achieve negative clearance, has extremely high rotation precision and high rigidity, and is 3-4 times stronger than conventional bearings. The bearing capacity of the crossed roller slewing bearing is also high, and the roller and the raceway are in line contact, withstand higher loads.

3.The installation of the cross roller slewing bearing

For cross roller slewing bearing, firstly, the roller and spacer block must be correctly placed, then install the screws or bolts, and then adjust the no-load slewing resistance torque after the installation. The next step is to correctly place the inner circumference and the outer periphery. Place it on the workbench, place it in the lower half of the inner circumference and try to make the outer raceway correspond to the inner circumference channel. Fill the gap with the spacer block. The number of rollers and spacers is generally equal, and the rollers and spacers should be close to each other. If there is a gap between the rollers and the spacers, the thickness of one or two spacers can be adjusted to compensate for the gaps. The grease gently and evenly on the raceway. The installation process is an important process. Try to ask a professional to install it to avoid problems with the bearings.

The above is the analysis of the model and characteristics of the cross roller slewing bearing. The cross roller slewing bearing has higher adaptability, higher precision grade, high rigidity, large load bearing capacity and strong resistance to damage than ordinary bearings. Therefore, the direction of use is also for large-scale mechanical equipment, such as overweight transportation machinery, port machinery, mining machinery, park amusement machines, filling machines, construction machinery and missile launchers.

How the Slewing Bearing Works?

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The slewing bearing, also known as the slewing ring bearing, is a very large bearing capable of withstanding the combined load, and can withstand large axial, radial loads and overturning moments at the same time. Mainly used in large-scale mechanical equipment, such as some cranes and excavators and other equipment. The basic structure of the slewing bearing is similar to the common bearing, but in order to adapt to the more complicated environment, the structure of the slewing bearing is mainly composed of the mounting hole, the internal gear or the external gear, the lubricating oil hole and the sealing device. The design is compact, easy to guide and easy to maintain.

Double Row Ball Slewing Bearing

1.The working principle of the slewing bearing

The working principle of the slewing bearing is very simple, mainly the way of moving the object to slide and reduce the frictional resistance. Specifically, the slewing bearing mainly relies on lubrication and friction to achieve the purpose of operation. Internally, it relies on the mutual friction between the ball and the steel ring for the purpose of operation. On the outside, it also relies on the frictional force of the slewing bearing and other components to start the operation and rub against each other, thus driving the object to operate. Of course, there is still not enough light to rub. Although it relies on friction to operate, lubrication is also essential. Just like the chain of bicycles, it takes a long time, and the friction is too large, which will affect the use of parts. Therefore, after using this kind of bearing segment time, it is necessary to carry out maintenance in time and brush some lubricating oil to ensure that it can be in a suitable environment.

2.The working mode of the slewing bearing

The slewing bearing has four series of four-point contact ball bearings, double-row angular contact ball bearings, crossed roller bearings, crossed tapered roller bearings and three rows of roller composite bearings. Four point contact ball bearings have high static Load capacity; cross cylindrical roller has high dynamic load capacity; pre-interference of crossed tapered roller bearing can make bearing have greater support rigidity and rotation precision. Three row roller slewing bearing is promoted due to the increase of bearing capacity. To the bearing height, the various forces are respectively subjected to different raceways, so the bearing diameter can be greatly reduced under the same force condition, and thus has a high load carrying capacity.

2.1. Point contact rolling working mode of slewing bearing

The point contact rolling principle of the slewing bearing is mainly used for the four point contact ball slewing bearing and the cross roller slewing bearing. This working principle has a higher requirement on the quality of the steel ball for the combination of the point contact radial axial force, and the track has a uniform angle.

2.2. Surface contact rolling combined working mode of slewing bearing

The surface contact rolling combination working principle of the slewing bearing is mainly used for the three-row roller slewing bearing. Its advantage is that the contact surface is large and the bearing force is evenly rolling and flexible.

2.3. The surface contact of the slewing bearing is combined with the rolling type

The surface contact rolling combined working principle of the slewing bearing is mainly used for the rotary table bearing. Now the new slewing bearing has a compact structure and high precision. Therefore, the surface contact rolling and sliding working mode is suitable.

2.4. The slewing bearing rolling combination scrolling working mode

The rolling combined rolling principle of the slewing bearing is mainly used for the combined ball and column slewing bearing. This principle has the advantages of small eccentricity, long service life and double structure of roller and ball.

The above is the introduction of the working principle and working mode of the slewing bearing. The principle of the slewing bearing is mainly to realize the rotation of the mechanical equipment through the friction. Due to its good performance, slewing bearings are widely used in large-scale rotary devices such as lifting machinery, mining machinery, construction machinery, port machinery, ship machinery and high-precision radar machinery and missile launchers. At the same time, we can design, develop and produce various special structure slewing bearings according to the specific requirements of users.

Stacker and reclaimer slewing bearing had been replaced and installed well

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Recently, our company has supplied the slewing bearing for the bucket wheel stacker and reclaimer produced by a large thermal power plant in Northeast China. It has been sent to the user for installation and commissioning.

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The stacker reclaimer, also known as the bucket wheel stacker reclaimer, stacker and reclaimer, is a new type of high efficiency continuous loading and unloading machine. It is mainly used for loading and unloading iron ore (sand), coal, sand, etc. in bulk storage yards for bulk cargo terminals, steel plants, large thermal power plants and mines. This machine is widely used at home and abroad because of its high operating efficiency. Generally, the rotating part of the large bucket wheel stacker and reclaimer is a large diameter slewing bearing. The user of this company cooperated with this bucket wheel stacker and reclaimer, which was produced by a heavy machinery factory in Changsha. The original large slewing bearing has been used for seven or eight years, and there is a rotation stuck, big noise and other issues.

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Customer need replace the slewing bearing. After the previous communication, on-site understanding of surveying and mapping, our company confirmed that this set of products is a slewing bearing model 1797/2635 bearing commonly used in bucket wheel stacker reclaimers. It is a 1797 bearing series model commonly used by domestic big bucket wheel stacker and reclaimer manufacturers. This 1797 slewing bearing series includes 1797/2100, 1797/2460, 1797/2500, 1797/2600, 1797/2635, 1797/3230 six basics. Models, are the models of the slewing bearing of the stacker and reclaimer that our company hot sales products.

After 45 day production cycle, the slewing bearing is finished well. We despatch our technical staff to construction site to help install the slewing bearing.

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We HGB seek to be representative of China top quality machinery supplier.

Excavator slewing bearing and pinion to Chile

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On August 20, 2019, Luoyang Hengguan Bearing company finished slewing bearings and associated pinion gears for Chile customers.

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The slewing bearing and pinion are applied to the excavator, and the bearing raceways and teeth are quenched to bear better surface stress.

We specialized in producing excavator slewing bearings for many years, and almost 500 types of slewing bearing are accumulated recently. In order to ensure the fastest delivery, we have a large stock for some hot sales types, our customized producing time is 7-15 days.

For Excavator, we can provide slewing bearing for Caterpillar, Komatsu, JCB, Volvo, Doosan and other brand.