What requirements should the selection of bearing grease meet to choose the right one?

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For bearings, lubrication is very important. The use of grease can reduce friction. Excellent high-temperature oxidation stability can ensure the long-term normal operation of the lubricated parts at high temperatures, provide comprehensive protection to the bearing, and greatly extend the service life of the bearing. However, during mechanical operation, due to the working conditions (load, speed, temperature), working conditions (continuous operation, intermittent operation, vibration and shock, etc.) and working environment (humidity, temperature, pollution degree, etc.) during bearing rotation and friction The choice of grease will also be different. So, what requirements should the selection of bearing grease meet?

1. The use temperature of the grease should be at least 20-30 degrees lower than its dropping point

When the use temperature is high, the grease with good oxidation resistance, low evaporation loss and high dropping point should be selected. When the operating temperature is low, low starting torque and relatively low viscosity grease should be selected. For example, grease based on synthetic oil.
2. The selected grease should be compatible with the use speed of the lubricated friction pair

At high speeds, use low-viscosity base oils with greater penetration. For low-speed grease, you should choose a grease with a high penetration grade made of a high-viscosity base oil.

3. The selected grease should be suitable for the load

For heavy loads, a grease with high base oil viscosity and high thickener content should be selected. When the load is particularly heavy, care should be taken to select grease with extreme pressure additives or fillers (molybdenum disulfide, graphite). For medium and low loads, grease with a short, medium viscosity base oil of No. 2 consistency soap fiber structure is generally used

4. The selected grease should be compatible with the environmental conditions used
In an environment where the air is humid or in contact with water, greases with good water resistance such as calcium-based, lithium-based, and lithium complex-based should be used. When there is a lot of dust, you should choose a thicker and harder (that is, a higher grade) grease, which has better sealing performance and can prevent impurities from mixing into the friction pair. In a strong chemical environment, synthetic oil greases that resist chemical media such as fluorocarbon grease should be used.

slewing bearing

5. The selected grease should be compatible with the grease supply mode of the friction pair

When it is a centralized grease supply, you should choose 00～1 grease. For parts where grease is regularly filled with grease guns, grease cups, etc., grease No. 1 to No. 3 should be selected. For long-term use without changing the grease, you should choose No. 2 or No. 3 grease.

6. The selected grease should be compatible with the working state of the friction pair

For example, when the vibration is large, use high-viscosity, adhesive and vibration-damping grease, such as high-viscosity cycloalkyl or compound soap-based grease thickened with mixed base lubricating oil.

7. The selected grease should be suitable for its purpose of use

The grease used for lubrication must be specifically selected according to the type of friction pair, working conditions, working conditions, environmental conditions and grease supply methods. For protective grease, it should be able to effectively protect metals from corrosion. For example, to protect parts in contact with seawater, aluminum-based grease with strong adhesion and water resistance should be selected. General protection grease can be made of solid hydrocarbon thickened high-viscosity base oil. For the sealing grease, attention should be paid to its resistance to the solvent of the sealed medium.

8. The selected grease should be as good as possible to reduce the variety of grease

In the case of meeting the requirements, try to use lithium-based grease, complex soap-based grease, polyurea grease and other multi-purpose general-purpose greases. In this way, the variety of grease is reduced, the management of grease is simplified, and the long service life of pleiotropic grease can reduce the cost of grease, reduce maintenance costs, and improve economic benefits.

The above is the answer to what requirements should be met for the selection of bearing grease. In daily bearing maintenance and repair, various types of grease are used, including sodium-based, calcium-based, lithium-based, barium-based, aluminum-based grease, etc. Etc. to ensure the normal operation of bearings and other components

How to ensure the safe operation of single-row ball slewing ring?

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Single-row ball slewing ring is one of the important parts of modern machinery and equipment, mainly composed of upper ring, lower ring and full ball. Its running speed is very low, and it is usually used in many mechanical products, for example, it is widely used in rotating equipment such as rotary conveyors, excavators, construction machinery, and small and medium-sized cranes. The safe operation of the single-row ball slewing bearing is very important, and it directly affects the working efficiency of the unloading equipment. So, how to ensure the safe operation of single-row ball slewing ring?

 

  1. Choose a good quality slewing bearing

 

Single-row ball slewing ring is an important part of the machine. And because the components are affected by factors such as the environment and the load during work, they can be regarded as consumables. We need to buy it frequently to maintain the normal operation of the machine. In this regard, we can start from the brand. If the machine itself is a well-known brand product, buy parts of the same brand. Because each brand uses different alloy formulations, there are subtle differences. Next, buy a single-row ball slewing bearing, please pay attention to the toughness of the product. Because the parts are thin, many parts look good, but they are compensated after being placed on the machine for a long time. Actually you can buy more brands in practice.

 

  1. Timely lubrication work

 

After working for a while, you should pay attention to its running status. You can add some protective oil from time to time to effectively extend its service life.

 

  1. Choose labyrinth ring seal

 

The sealing of the single-row ball slewing bearing is to prevent grease leakage and filling and also to prevent external dust, impurities and moisture from entering the bearing and affecting normal operation. Since single-row ball bearings mainly work in heavy load and low-speed work, the seal ring has two structures: rubber ring and labyrinth ring. The rubber seal itself has a simple structure. The advantages of small space and reliable sealing have been widely used, but its disadvantage is that the rubber sealing lip is prone to premature aging under high temperature conditions and loses sealing performance, so the volleyball slewing ring bearing should adopt labyrinth seal.

 

  1. Working clearance

 

One of the key factors affecting the operation of the bearing is the working clearance of the bearing. The main factors affecting the working clearance of the bearing include the fit between the inner ring of the shaft and the shaft, the fit between the outer ring of the bearing and the bearing chamber, and the bearing’s own play under non-assembly conditions. Various objective factors such as gaps, equipment operating status and turnover environment. The same mechanical equipment may have different clearances under different operating conditions. To ensure the guarantee effect of the bearing during the operation of the equipment, the selection of the bearing,

high precision 2.5m slewing bearings

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Recently our company (Luoyang Hengguan Bearing Technology Co., Ltd.) produced a set of ultra-high-precision slewing bearings with an outer diameter of 2.5 meters for a customer in Jiangsu. This product is a three-row internal gear slewing bearing. All indicators of the finished product exceed Customer requirements.

 

This product is applied to the precision machining platform center, so the quality and precision of the product are very high. In the early order negotiation stage, after detailed communication between the technical personnel of both parties, according to the user’s use requirements and working conditions, this set of large diameter The end face runout of the slewing ring bearing is set at 0.08, the axial clearance is 0.05-0.12, and the radial clearance is 0.05-0.15; this accuracy requirement is much higher than the standard ordinary accuracy of the slewing ring bearing. Based on our processing equipment and actual combat experience, we are confident that we can guarantee the quality and precision of our products, so we will do it in one word!

 

Facts speak louder than words. After the order is received, Hengguan people discuss and negotiate together, formulate production plans, predict the problems that may be encountered in the production progress, and discuss countermeasures and solutions one by one. , Finished product inspection results: end face runout 0.03, axial direction 0.05, radial direction 0.1; exceed the requirements! The guests inspected on the spot and couldn’t help but repeatedly exclaimed “Good, good…”! Really realize that a good product can speak for itself!

 

Hengguan people are brave to challenge, dare to innovate, do what they say, do what they say, and value the spirit of contract. This is the standard of life, but also the standard of work! “Words must be done, actions must be resolute” is the principle that we Hengguan people have always adhered to! Choose us, trust us, you will be satisfied! Come on, let us walk hand in hand to create a better future!

Introduction to the countermeasures and solutions for common slewing bearing noise

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We all know that slewing bearings are commonly used bearings in many large mechanical equipment. After long-term use, different noises will appear, such as dust and scars. What methods should be used to solve these noises? In response to such problems, the editor will tell you the countermeasures and solutions for common slewing bearing noise.

1. The sound of dust
There are foreign objects such as dust in the slewing ring, and non-periodic vibration will occur. The so-called dust sound. The magnitude of vibration and noise is uncertain, and there may or may not be.

Countermeasures: Improve the cleaning method of slewing ring/turntable bearings, strictly clean the bearings, shafts, seat holes and matching parts before installation; remove foreign objects in the lubricant; improve the sealing of the bearings; avoid using impure or embedded materials Plastic cage for foreign objects.

2. The sound of scars

If the rolling surface of the slewing bearing has cracks, indentations or corrosion, periodic vibration and noise like riveting rivets will occur. The period may be fixed, but most of them have a fixed correspondence with the speed. The scars will be continuous on the channel. Occurs, the scars are visible on the steel ball from time to time, and this noise varies with the installation and lubrication conditions.

Measures to deal with this type of noise: Do not knock the bearing during installation, prevent the bearing from being skewed when the bearing is assembled with the shaft and then put it into the bearing housing; prevent bearing corrosion during storage and prevent shock and vibration during transportation; use high-viscosity grease .

3. Noise caused by lubrication factors

Wrong selection of lubricants, insufficient lubricants or aging and hardening can cause vibration and noise in the slewing ring/turntable bearing, and there is no fixed law for this noise.

Treatment countermeasures: In this case, only choose a suitable lubricant, adjust the amount of lubricant, extend the life of the lubricant and reasonably determine the replacement cycle.

4. Noise related to the host and countermeasures

This kind of noise is not simply caused by the bearing, so it is impossible to find the cause from the bearing alone. Attention should be paid to the mainframe, and the performance of the mainframe should be improved if necessary. Now we mainly describe the common buzzing sound and frame resonance sound in the motor.

1. The buzzing sound of the motor

The axial vibration of the motor shaft will cause a lot of high-frequency noise-the buzzing sound, the frequency of which is the same as the axial vibration frequency, and it can be constant or variable. The method of preventing buzzing is the same as that of preventing axial vibration.

2, countermeasures for bearing frame resonance sound

When the axial natural vibration of the outer ring mass system causes the axial bending natural vibration of the bearing frame, a kind of noise called resonance sound is generated. The method of increasing the preload can increase the axial natural frequency of the outer ring mass system, destroy the resonance condition and reduce the noise。

The above is the analysis and explanation of the four common slewing ring noise causes and treatment countermeasures. I hope to bring help to everyone. If noise is found during the slewing ring operation, it must be shut down for inspection and reasonable countermeasures are given.

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.

Reason why the slewing bearing shake when the excavator is working

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The excavator can rotate left and right during operation, and it is inseparable from the function of the slewing device. The slewing ring is an important part of the slewing device, which is mainly used to support the mass of the upper car body and bear the working load. Because the slewing bearings of excavators generally operate under heavy loads, and the working environment is relatively harsh, the slewing bearings are prone to failures. The slewing bearings shake when the excavator is working. What’s wrong with it? Next, let’s follow the editor to understand it.

Whether it is dumping soil or loading a truck, the excavator must perform a rotating action, and hundreds of rotating actions can be carried out smoothly every day to ensure the quality and efficiency of the completion of the project. Because of the high frequency of use, many operators often encounter abnormal rotating noise, rotating stuck, slow and weak movements during the construction process. There is no doubt that they can only stop and repair as soon as possible when encountering the above failures!

1. The rigidity of the steel structure supporting the slewing bearing of the excavator is insufficient, and elastic deformation occurs during loading, causing the slewing bearing to shake as a whole. Increase the strength of the supporting slewing bearing steel structure by 14 times.

2. Loose installation bolts, causing shaking during work. Please check all the inner and outer ring mounting bolts immediately and tighten them as required.

3. Long-term overload operation causes the raceway to collapse and the clearance is too large. Check whether it is overloaded and operate in strict accordance with the regulations.

4. Remove the slewing motor assembly, separate the motor and check that the sun gear and the bracket are normal, and the planetary gears and the bracket are also normal. When checking the output shaft, it is found that there is eccentricity, and there is abnormal noise during rotation. After disassembly, it was found that the bearing had fallen apart and the housing was also severely worn. Because the bearing is damaged, the reducer housing is seriously worn, so it is normal after replacing the reducer assembly.

Slewing bearings include four-point contact ball bearings without gears, external gears and internal gears, double-row angular contact ball bearings, crossed cylindrical roller bearings, crossed tapered roller bearings and three-row cylindrical roller combined slewing bearings, etc. A variety of structural types. The four-point contact ball bearing has a higher static load capacity; the crossed cylindrical roller bearing has a higher dynamic load capacity; the crossed tapered roller bearing has a large supporting rigidity and a higher rotation through pre-interference energy. Accuracy.

Many machine friends can understand that this fault can actually be completely avoided. As long as the user pays enough attention to the maintenance problem when using the excavator daily, it will not cause such a big loss later. The editor once again reminds everyone that excavators are not indestructible, whether they are domestic or imported, so daily maintenance must be cautious and careful, and no detail can be ignored!

How to install the turntable bearings?Introduction of installation process and requirements

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Turntable bearing is a kind of special structure of large bearings, able to bear a larger axial and radial load and tilting moment of load combined load has a compact structure convenient guide rotation installation is simple and easy to maintain, etc, are widely used in engineering machinery and mining machinery wind power port petrochemical light industrial robot aerospace vehicle radar medical devices and military industry and other industries of large rotary device but how many for wheel bearing installation, but is not very understanding, constant crown wheel bearing small make up just to tell you about today’s installation process

One.Disposal of a turntable bearing before installation

1.Rustproof and packing

The inner and outer surfaces of the turntable bearing are uniformly coated with both sides of the bearing anti-rust lubrication oil. The packaging is wrapped with plastic film kraft paper and linen strips.The outer surface of the bearings of large size turntable should be wound with plastic cloth.For small size turntable bearings packed in wooden cases

2.Transportation

Keep bearings horizontally as much as possible during transportation. Only slight tilting is allowed. Large collisions or vibrations should be avoided.After opening the package, lift the bearing to the installation position by turning the lifting bolt inside the lifting hole of the inner ring or outer ring

3.Storage

①Before use, do not open the package during the rust prevention period (within 12 months after the bearing leaves the factory). If maintenance is needed, anti-rust treatment should be carried out on the tooth surface of the outer raceway of the rotary disc bearing

②Place horizontally on a dry, flat surface

③Place horizontally on a dry, flat surface

④If multiple sets of turntable bearings are stacked together, at least three evenly distributed wooden pads should be placed between each set of turntable bearings along the circumference, and the upper and lower pads should be placed in the same position

Two.Install turntable bearings

1.Place internal and external factors correctly

Put the external cause flat on the work table, put it into the lower half and try to make the external raceway and the internal cause channel corresponding to the correct placement of rollers and isolation block. The selected cylindrical roller and circular isolation block are placed along the track. When placing the adjacent cylinder rolls, their axes are perpendicular to each other, and the two rollers are separated by an isolation block

2.Coated grease

Apply the appropriate grease lightly and evenly on the racetrack.Fill the gap between rolling and isolation block.The number of roller and isolation block is generally equal, and the cylinder dredge and isolation block should be close to each other. If there is a gap between roller and isolation block at one place, the thickness of one or two isolation blocks can be adjusted to make up the gap.

3.Mounting bolt

Turn the opposite assembly bolts 1-2 times in the diameter direction and turn the other integral ring at the same time to prevent the roller from getting stuck in an inappropriate position.Then twist the two symmetrical studs 180 apart, and so on, until all bolts are screwed to the specified torque value.When tightening bolts, ensure that the adjusting plate is in good position, and use a force wrench, so that the bolt can obtain the specified pretightening torque.

Three.Installation after inspection

After installation, if there are abnormal phenomena such as noise, impact and sudden increase of power, the machine should be stopped for disassembly and inspection.After running for about 100 hours, check the pretightening torque of the mounting bolts in the inner and outer rings, and check it every 500 hours after running.

When the bearing is disassembled and cleaned, the bearing assembly drawing shall be followed, and the upper and lower two halves of the ring shall be assembled according to the original drilling position.The tooth surface should be cleaned of debris every 10 days and lubricated。

Four.Installation requirements

1.Before the installation bolts are not completely tightened, the gear meshing inspection should be carried out to ensure the meshing clearance and meet the accuracy requirements of the gear.

2.Adjustable flat washer is optional when installing bolts. Spring washer is not allowed.

3.After radial positioning of the turntable bearing, cross tighten the mounting bolts and check the free rotation of the bearing.Sufficient preloading force shall be required when tightening bolts, which shall be 70% of the yield limit of bolt materials.
4.Before the installation bolts are not completely tightened, the gear meshing inspection should be carried out to ensure the meshing clearance and meet the accuracy requirements of the gear.
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the stainless steel slewing bearing was successfully completed and delivered to the user

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At the beginning of this month, the stainless steel slewing bearing designed and manufactured by our company (Luoyang Heng Guan Bearing Technology Co., Ltd.) was successfully completed and delivered to the user. The installation and commissioning were successful!

 

 

This set of stainless steel slewing bearings is used in nuclear power equipment projects. The customer has extremely high requirements for product quality. After many technical discussions with the customer’s technology, we design products that meet the needs of customers according to customer needs. And put it into production.

 

Generally speaking, slewing bearings generally use two materials, 50Mn and 42CrMo; for special purposes, stainless steel is used. Compared with slewing bearings of common materials, stainless steel slewing bearings have stronger anti-rust and corrosion resistance. Choose suitable dust caps and lubricants. Stainless steel slewing bearings can be used in an environment of -60℃~+300℃ . Because of its high mechanical strength, large load capacity, and bright and beautiful appearance, stainless steel slewing bearings are widely used in food processing, medical equipment, pharmaceutical machinery, nuclear industry projects and other equipment.

 

After about 40 days of processing and manufacturing, the outer diameter of the set reached 1.7 meters, the teeth were quenched, and the stainless steel slewing bearing with a single row of external teeth was successfully rolled off the production line and delivered successfully. Hengguan Bearing proves once again with strength and ability: high-end non-standard customized bearings, we have done very well! Choose us, trust us, you will be satisfied!

 

(For details on stainless steel slewing bearing technology, please call for detailed discus)

Detailed description of rolling bearing precision grade and selection

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Bearing is one of the commonly used parts in mechanical equipment, due to the different precision requirements of the equipment,
plus the bearing precision provided by different manufacturers are also different.But no matter how the requirements of the bearing precision,
for the bearing precision or there is a level of standard, in addition, the choice of the bearing is also a strict standard.Today xiaobian to tell you about the accuracy of rolling bearings and selection

The precision of bearing includes dimension precision and rotation precision.Dimensional accuracy is the required item for mounting a bearing on a shaft or bearing box. It includes inner diameter, outer diameter, width, chamfering dimensional tolerances or allowable values.
The geometric accuracy includes internal diameter deviation, average internal diameter difference, external diameter deviation, average external diameter difference and allowable value of the ring end face parallel difference.The precision of rotation is specified for the pendulum during rotation, including radial and axial swing of inner and outer rings, and vertical tolerance range of inner ring side swing and outer diameter surface.

One.Bearing accuracy class code

1.China bearing previous code accuracy class code
The standards developed by each country are based on ISO standards, which are generally related to ISO- and are individually stricter than ISO standard

The precision is divided into dimension precision and rotation precision,It is divided into level 0, level 6, level 6, level 5, level 4 and level 2
The old code standard of Chinese bearings before is :G class (0 class) E class (6 class) D class (5 class) C class (4 class) B class (2 class)。

2.Current code generally adopts German DIN standard
Accuracy level has been standardized and divided into P0 (0 level), P6 (6 level), P5 (5 level), P4 (4 level), P2 (2 level)

The precision of bearing is improved successively from level 0. PO level is a national standard, and it is also a common standard in the bearing industry, so it is also called ordinary level.
At present, most manufacturers in China also produce PO level products, while P2 level is a precision level, and specific technical parameters are also standardized

General standard grade P0, reflected in the bearing type is omitted, only P6 or above, the grade code appears in the bearing type

For example: 6205 and 6205/p5, where the precision level of 6205 is PO, but it is omitted, which gives people the impression that the PO level is non-precision level bearing

Two.The selection of bearings with different precision
1.Grade 0: in the rotation accuracy of more than 10 m of the general bearing system, it is widely used such as the common machine tool speed change mechanism feed mechanism automobile tractor speed change mechanism,
common motor water pump and agricultural machinery and other general machinery of the rotation mechanism

2, Grade 5: In precision bearing systems with rotation accuracy of 5-10 m or higher rotation speed, such as bearings used in ordinary lathes (5 for front support, 6 for rear support),
more precise instruments, instruments, and precise rotating mechanisms。

3 ,Grade 2: In ultra-precision instruments with rotation accuracy of less than 5 m or at very high speeds, such as precision jig boring machines, gear systems for precision grinding machines, precision instruments, meters and high-speed cameras.

A good bearing is important is used in the appropriate place, the bearings suitable place, there must be precision grade to divide.In mechanical equipment, it is impossible for a high precision bearing to replace the general bearings, general bearings can not replace the high precision class of bearings.

Maintenance work of the rotary mechanism of the drilling rig

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During the use of the drilling rig, the problems that are prone to occur in the slewing system are the wear of the slewing bearing steel ball, the pitting of the output gear of the slewing reducer, and the wear of the slewing brake friction plate. How to reduce the occurrence of the above-mentioned problems through daily operation and maintenance?

 

In the actual construction process, the performance requirements of rotary drilling rigs are increasingly strengthened. How to ensure that the drilling rig can exert maximum performance in the actual construction process? This requires not only a good initial performance index of the drilling rig, but also the later use process. Careful maintenance.

 

  1. slewing bearing lubrication

 

The entire slewing ring is actually an enlarged bearing. During the rotation of the bearing, the steel balls inside must always be lubricated with lubricating oil to avoid dry grinding of the steel balls in the slewing ring. Before adding lubricating oil to the slewing bearing, the grease nipple should be cleaned to prevent foreign impurities from entering the slewing bearing during the lubricating process.

 

The slewing bearing is located under the base of the boom, and lubricating oil is added through the oil nozzle until the lubricating oil overflows from the bearing seal. At this time, it can be considered that the steel ball of the slewing bearing is completely protected by the lubricating oil.

 

  1. Replace the lubricating oil of the rotary drive unit

 

Check the lubricating oil level of the rotary drive device:

 

1) The dipstick for the lubricating oil of the turntable driving device is on the turntable device behind the boom base, and the dipstick is taken out.

 

2) Check the oil dipstick: Keep the oil level between the top of the dipstick and the mark on the dipstick. If necessary, add oil through the dipstick tube.

 

3)  Insert the dipstick.

 

  1. Lubricate the slewing ring gear

 

Note: Incorrect lubrication may cause damage to the parts of the drill. To avoid damage, make sure that the amount of grease added to the turntable drive is correct. Too much grease in the turntable gear chamber will increase the stirring loss, thus accelerating the deterioration of the grease. Deterioration of grease will cause damage to the pinion and inner ring of the turntable drive device; insufficient grease will result in poor gear lubrication.

1) Remove the inspection cover near the base of the boom and check the grease.

 

2) Remove the bolts, washers, lower cover and gaskets to drain water.

 

3) Check the gasket. If there is obvious damage, the gasket should be replaced; check the grease surface, the grease should be evenly distributed on the bottom of the groove.

 

4) Check whether the grease is contaminated and discolored. If the grease is contaminated or discolored due to water, replace the grease.

 

5) Raise the starter arm, turn the upper structure 1/4 turn, pause for a while after every 1/4 turn, and then perform the rotation work to ensure that the lubricant in the slewing ring can be evenly distributed to the surface of the slewing ring gear.

 

The above is the introduction to the maintenance work of the rotary mechanism of the drilling rig. Although the above-mentioned operations cannot completely avoid the aging of the drilling rig as the working time increases, these daily maintenance and maintenance will make the drilling rig work better and reduce the occurrence of serious failure, Reduce operating costs.