The special slewing bearing of Keling crane was successfully completed and delivered

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Recently, our company (Luoyang Hengguan Bearing Technology Co., Ltd.), to a ship management company in Indonesia, a custom -made carrier -specific bearing of the Cingling Specific Capital, which lasted for 35 days of overtime production process. buyer.

The crane is a foreign word. The English is CRANE, also known as a ship crane and a shiplift machine. It is a large deck machine on the ship. It is a device for ship loading and unloading. Planting and unloading equipment. At present, our company gives: Mitsubishi (Mitsubishi), Tsuji (辻 Industry), Fukushima (Fukushima), McKega, Roballo and other crane brands have provided replacement of rotary support for bearing products and services.


At the assembly site, the bearing of the bearing of the bearing of the bearing is: 62M3937.05.631, which is a four -point ball -type rotary support for the inner teeth. The shape parameters are 3078*2596*170, which is a common gram of the bearing structure. The shipowner plans to replace the two grams of large bearing. When the ship enters the port of Shanghai in China, it has booked a large repair replacement to replace the bearings. As the ship is full of universal year, the detailed parameters of the large bearing will be confirmed after the ship is shore and the unloading is completed after the ship is shore. After the goods, the next voyage will be turned on, about 35-45 days; so the shipowner requires that within 35 days, the bearing will be seamlessly connected to the port of Shanghai. , Time is money, competing for points, creating value for customers, we will be more valuable!
The vivid and true case at the delivery site is the better answer sheet of Hengguan returned to society. Luoyang Hengguan Bearing, as a member of the traditional manufacturing industry, but we have tried our best to abandon the traditional industrialization thinking, do not take self -centered, do not take technology, and do not take products as the center. Centered on; with user -oriented, market demand as the core; establishing brand strategic ideas, only in this way, can develop for a long time, increasingly strong! Choose Henguan to keep you worry -free! Come on, join us, I hope you will become our next full case participant!

Tips to install slewing bearing

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Those engaged in the machinery industry should be familiar with slewing bearings, and they should have some understanding. You must have learned some related knowledge. Today we will lead you to a better understanding of slewing bearings. I think everyone is also interested in how to install the slewing bearing. Next, let’s learn about the main points of the slewing bearing installation guide, so that it can be applied in the future.

1. Before installing the slewing bearing, check the installation surface of the main engine. The support should have sufficient strength, the connecting surface should be machined, and the surface should be smooth and free of debris and burrs. For those that cannot be machined to achieve the required flatness, special plastics with high injection strength can be used as fillers to ensure the accuracy of the installation plane and to reduce vibration. The ring of the slewing bearing has a quenched soft zone, which has a mark S on the end face of the ring. When installing, the position of the soft zone should be placed in the non-load area or the non-recurrent load zone (the plug hole is always at the soft zone ).

The installation of the slewing ring needs to master six magic weapons. Second, when installing the slewing ring, you should first perform radial positioning, tighten the mounting bolts crosswise, and check the rotation of the bearing. In order to ensure the smooth transmission of the bearing, the gear mesh should be checked before the mounting bolts are not tightened. There should be sufficient pre-tightening force when tightening the bolts, and the pre-tightening force should be 70% of the yield limit of the bolt material. The mounting bolts should be equipped with quenched and tempered flat washers, and spring washers are strictly prohibited. After the slewing bearing is installed, put it into operation. After 100 hours of continuous operation, check whether the pre-tightening torque of the mounting bolt meets the requirements. Repeat the above inspection every 500 hours of continuous operation.

3. After the slewing bearing is installed, an appropriate amount of grease should be filled, and the slewing bearing should be filled while filling to make the grease evenly distributed. The slewing bearing will inevitably lose part of the grease after working for a period of time. Therefore, the slewing bearing in normal operation should be refilled every 50 to 100 hours. For slewing bearings that work in high temperature environments or dusty conditions, the period of adding lubricating grease should be appropriately shorter. When the machine is to be shut down for storage, it must also be filled with sufficient grease.

4. Packaging, transportation and storage of the slewing ring: Before packaging the slewing bearing, the inner and outer raceways need to be coated with anti-rust lubricating grease, then wrapped with plastic film, compound kraft paper, and then wrapped with industrial wrapping tape for inner packaging. The outer packaging adopts special wooden box or iron box.

5. The bearing should be placed horizontally on the vehicle during transportation, and measures to prevent sliding and vibration should be taken, and auxiliary support should be added when necessary.

6. The bearing should be placed horizontally on a dry, ventilated and flat place, and should be kept away from chemicals and other corrosive items during storage. If multiple sets of bearings are stacked, three or more wooden spacers of equal height should be evenly placed along the circumference between each set, and the upper and lower spacers should be placed in the same position. Bearings that need to be stored after the anti-rust period should be cleaned and anti-rust treated again.

What are the reasons for the broken teeth of the slewing ring? How to solve it?

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The slewing bearing is also called the turntable bearing. It is an important transmission component necessary for a machine that needs to make a relative slewing motion between two objects, but also needs to bear axial force, radial force, and tilting moment. Known as machine joints, they are widely used in modern industrial machinery and equipment, such as excavators, cranes, wind turbines, industrial robots, cranes, radars and other equipment. The slewing bearing will also fail during long-term use, and some will have the phenomenon of broken teeth, so what are the reasons for the broken teeth of the slewing ring? Today, the editor will briefly discuss this issue with everyone.
The broken teeth of the slewing bearing are usually caused by the following reasons:

One.It is directly related to the installation

1. Improper adjustment of the side clearance of the big and small gears during installation fails to meet the requirements, resulting in broken teeth due to poor meshing of the two gears during operation. Therefore, the side clearance shall be adjusted strictly according to the requirements.

2.When the pinion gear meshes with the big zUI gear gear, it fails to engage with the pinion gear as required, resulting in tooth breakage when the pinion gear meshes with the big ZUI gear gear;Therefore, meshing adjustment with pinion should be carried out strictly in accordance with the requirements, and test run should be carried out after meshing adjustment.

3.The axis of the big and small gears is uneven. After installation, the gear meshing is not good, resulting in broken teeth. Therefore, the axes of the two gears should be parallel

4.The mounting bolts of slewing bearing are not fixed tightly, and the meshing of big and small gears is not tight, resulting in broken teeth, so the bolts should be fastened according to the requirements.When the mounting bolts become loose, resulting in elastic deformation of the sleeveless support and negative clearance in the deformation position, it is necessary to immediately check and tighten the bolts as required.

Slewing bearing

Two.Broken teeth due to improper use

1.Violate the operating rules, overload and tell the rotation, host colliding with obstacles, etc., so it should be operated in strict accordance with the operating rules

2.There is a foreign matter stuck when the slewing support meshes with the pinion, so it is necessary to ensure the cleanliness of the gear and check it frequently.

Above is the analysis on the cause of the rotary bearing broken teeth, to avoid the rotary bearing fault, broken teeth at work when installation, must adjust good big gear and small gear meshing backlash, and in strict accordance with the requirements and small gear meshing adjustments, regularly check the rotary bearing bolt looseness, if there are any loose, tighten immediately.In addition, operators in the operation in strict accordance with the rules of operation.

What are the factors to be considered when selecting a slewing drive device?

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The slewing drive we often say is actually a full-circle slewing reduction transmission mechanism integrated with a driving power source. It takes a slewing bearing as a drive follower and mechanism attachment. It makes one of the rings ( inner ring or outer ring) to be attached as the driving part, the driving source and the cover, and the other ring as the transmission follower and the connection base of the driven working part. In this way, it can make use of the characteristic of the slewing bearing which is a full-circle slewing connection to configure efficiently the driving power source and main transmission parts. And finally make it to be a universal reduction transmission mechanism that integrates the functions of rotation, reduction and driving, while having a simple structure and convenient manufacturing and maintenance. At present, there are many types of slewing drive devices. What are the factors to be considered when selecting a slewing drive device?

1. Magnitude, Direction and characters of the load
The slewing drive device is suitable for light loads, and the roller bearing is suitable for heavy loads and shock loads. When the rolling bearing is subjected to pure axial load, thrust bearing is generally selected; when the rolling bearing is subjected to pure radial load, deep groove ball bearing or short cylindrical roller bearing is generally selected; when the slewing device is subjected to pure radial load, and with not large axial loads, deep groove ball bearings, angular contact ball bearings, tapered roller bearings and self-aligning ball or spherical roller bearings can be selected; When the axial load is large, the angle contact bearing and tapered roller bearings ca be selected, or use a combination of radial bearings and thrust bearings, which are particularly suitable for extremely high axial loads or special requirements for greater axial rigidity.

2. Allowable speed
Due to big differences of types of slewing drive, bearings with low friction and low heat are suitable for high speeds generally. During the design, the slewing rolling bearing should considered to be work under the condition of lower than its limit speed.

3. Rigidity
When the bearing of the slewing drive device bears a load, elastic deformation occurs at the contact between the bearing ring and the rolling element. The amount of deformation is proportional to the load, and the ratio determines the rigidity of the bearing. Generally, the rigidity of the bearing can be improved by preloading the bearing; In addition, in the bearing design, considering the combination and arrangement of the bearing can also improve the support rigidity of the bearing.

4. Alignment performance and installation error
After the bearing is installed in the working position, it is often poor in installation and positioning due to manufacturing errors. At this time, the bearing is often subjected to excessive load due to the fishing degree and thermal expansion of the shaft, causing early damage. The self-aligning bearing can overcome the defects caused by the installation error by itself, so it is the bearing suitable for this purpose.

5. Installation and disassembly of slewing drive device

Tapered roller bearings, needle roller bearings and etc., belong to the type of bearing with separable inner and outer rings (so-called separate bearings), which are easy to install and disassemble.

It is a brief introduction to the factors that need to be considered when selecting the slewing drive device above. The slewing drive can be used in any situation that requires full rotation and variable speed requirements. When it is necessary to achieve greater torque power transmission and higher precision motion transmission Or when selecting a mechanism that requires a high degree of compact body structure and integration, slewing drive is the solution. In addition, the slewing drive device is convenient to install and saving space. When selecting the model, first consider whether the shaft radial load, overturning torque and other parameters are workable for use. Secondly, the final output speed of the slewing drive cannot exceed 3 revolutions during use, in order to ensure the product normal service life.