Reasons and treatment methods of abnormal noise of tower crane slewing bearing

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You should often see tower cranes on construction sites, right? It operates flexibly and has a large carrying capacity, which has made great contributions to improving the construction progress and ensuring the quality of the project. The slewing bearing is one of the commonly used bearings of many construction machinery, and it is found in tower cranes. Many friends who are engaged in the operation of tower cranes will report the problem of abnormal noise in the slewing bearing. Next, the editor of Hengguan will summarize the reasons and treatment methods for abnormal noise of tower crane slewing bearing.
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1. Reasons for abnormal noise of tower crane slewing bearing
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1. The machining accuracy of the bearing gear is not enough
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The precision of the slewing bearing gear determines the stability, accuracy and uniformity of the load distribution of the slewing bearing transmission. The higher the gear precision, the denser the contact spots on the meshing tooth surface. The normal level should be between 7 and 11. If the precision is not enough, it is easy to cause abnormal noise.
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2. The internal machining accuracy of the bearing is not enough
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The inner steel ball and raceway of the slewing bearing have low machining accuracy or quality defects, which can easily cause the collision between the rolling body and the spacer, which affects the stability of the bearing operation and also causes excessive noise.
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3. Bearing gear wear
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Due to the powerful work of the tower crane, after the slewing bearing gear is under load for a long time, small pieces of metal or strip-shaped metal iron filings will fall off near the pitch line of the tooth surface, forming pitting or gnawing teeth until the tooth shape is damaged. The abnormal noise and impact increase when the tower crane rotates.
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4. Insufficient bearing lubrication
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The lack of grease in the slewing bearing or the deterioration of the grease will cause the friction between the rolling element and the raceway to increase, the rotational resistance to increase, and the rotation to be inflexible, resulting in abnormal noise.
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2. Processing method
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1. Choose a slewing bearing with reliable quality
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To avoid the problem of abnormal sound of slewing bearing, the premise is to control the procurement. Ensure that the bearing material quality is reliable, and the gear and internal machining accuracy is up to standard, making it more flexible in operation and longer in service life.
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2. Supplement or replace grease in time
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According to the bearing instructions or relevant operating specifications, add grease in time. For special working environments such as dust, high temperature difference, and high humidity, the lubrication cycle should be shortened. As a result, the friction between the gears can be reduced, the wear speed of the gear ring gear can be slowed down, and the frictional noise of operation can be reduced.
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3. Fastening bolts
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The connection bolts between the slewing bearing and the upper and lower supports are loose or the pre-tightening force cannot meet the requirements, which will cause the rear axial clearance to increase, the rolling elements rotate under a large overturning moment, and the raceway edge is subject to large contact stress, resulting in rolling. The edge of the road is damaged, causing abnormal noise. Therefore, it is necessary to fasten the bolts in time to make them reach the specified pre-tightening force.

Causes and treatment methods of overheating of slewing bearing

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The overheating phenomenon of the slewing bearing during operation is one of the common faults of the bearing. Once the overheating phenomenon is found, it needs to be stopped in time for investigation and treatment. Improper handling will reduce the efficiency of mechanical equipment, and may cause serious damage to the bearing, increase unnecessary capital investment, and delay the construction period, which is not worth the loss. So what are the reasons for the overheating of the slewing bearing? How to deal with it? Next, the editor of Hengguan will give you a detailed introduction.
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1. The cause of overheating
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1. Poor lubrication
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Good lubrication is a necessary condition to ensure the normal operation of the bearing. If the bearing grease is insufficient or deteriorated, it will increase the friction and wear of the bearing, causing the bearing to overheat.
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2. Improper installation
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When the bearing is installed, it is required that the center line of the shaft and the bearing hole need to be coincident. If the installation is not correct, the bearing will have deflection, and torque will be generated when rotating, causing the bearing to overheat, wear, vibrate, and increase noise.
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3. Inspection and replacement are not timely
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The bearings in operation should be checked in time. If serious fatigue spalling, oxidation rust, pits, cracks, etc. are found, new bearings should be replaced in time, otherwise the bearings will be overheated, abnormal noise or even damage the mechanical equipment.
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4. Poor bearing quality or improper selection
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The slewing bearing generally works for a long time under strong stress. The accuracy, life and reliability of the main engine largely depend on the bearing. If the bearing itself is of poor quality or improperly selected at the time of purchase, its limit speed and load capacity will not match the equipment. , may cause overheating.
Slewing bearing
2. Processing method
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1. Purchase bearings with good quality and matching models
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When purchasing bearings, the quality must be strictly controlled, and factors such as the nature, size, temperature conditions, and rotation of the inner and outer rings of the bearing load should be comprehensively considered according to the equipment requirements to ensure that the model matches.
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2. Install the bearing according to the operating procedures
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When the bearing is installed, the coordination between the inner diameter of the bearing and the shaft, the outer diameter and the outer casing is very important. In addition, the center line of the shaft and the bearing hole needs to be coincident to prevent the bearing from overheating, vibration, abnormal noise, etc. caused by wear caused by improper installation.
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3. Regularly check and replenish grease
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Bearings should be regularly inspected for grease. If the lubrication is insufficient, it should be replenished in time. If the grease deteriorates, it should be replaced in time. Different types of grease cannot be mixed.
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4. Timely check the running condition of the bearing
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Timely check whether the bearing is bitten and worn, check whether there are cracks, rust, pits and other defects inside and outside the bearing, measure whether the bearing clearance exceeds the standard, and repair or replace the new bearing in time if there is an abnormality.

What is the main component of the slewing bearing ? the precautions before installation

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The slewing bearing is also called the turntable bearing, and some people call it to rotate, rounded support, which is a new type of mechanical components. As the joints in mechanical equipment, it has an important role in machine equipment. With the rapid development of the machinery industry, the application range of the rotary support is also more wide. Although the application of the rotary support is very broad, many people don’t understand it, and the Hengguan Xiaobian introduces you the main components of the rotary support and its pre-installation considerations.
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First, the main components of the slewing bearing
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1, ferrule

The slewing bearing has an inner ring and a coat, there is a circle between its internal and outer casings, and the roller is a weak link, usually the roller will be quenched, reach the corresponding depth and hardness. Falling against wear and preventing the roller from peeling.

2, rolling body

Typically, the rotary supported rolling body is made by integral hardened carbon chromium bearing steel. The existence of the rolling element makes the relative rotation and load transfer property between the inner and outer rods, which can well reduce the rotational resistance. Usually the ball on the rolling body, the roller is made of hard chrome alloy.

3, hold frame

There are three different structural forms, which are separated by isolation blocks, integral, and segmented. The cage can be separated by the rolling bodies, which can reduce friction and prevent slippery, and the role of snorting during the rotary support rotation.

Made of steel or casting aluminum alloy in the overall type and segmented cage. The isolation block is made of polyamide resin, cast aluminum alloy or the like. With the continuous development of the industry, nylon has gradually been used in the production of segmented retention.

4, seal ring

The rotary support has a seal to prevent lubricants from being lost while protecting the rotary support is not contaminated by dust and particles. The seal is made of an elastomeric material, and a lubricant with most general mineral oil and a lithium-group or calcium-based thickener.
Slewing ring

1, need to confirm the appearance before installation

Before installing the slewing support, you need to make a careful appearance check, confirm that the rotary support does not receive a relatively large damage during transport; if the customer requires quenching or other requirements, it is also confirmed that there is no soft belt mark and gear beating. Larger position tag.

2, need to clean the impurities before installation

The rotary support acts in the device to connect support, so before installation, it is necessary to confirm that the impurities on the rotary support have been cleaned, avoiding wear and failure due to the existence of impurities.

The above is a related introduction to the main components of the rotary support and the precautions before installation, I hope to help you understand the rotary support. The rotary support is small, compact, lightweight, can at the same time to withstand the torque from different directions, and the range of use is more wide. Luoyang Hengzhang Bearing Technology Co., Ltd. focuses on producing high-quality swivel support, if you have related needs, please call order.

The working principle and working way of the slewing bearing

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Slewing bearings are widely used in machinery, such as excavators, disintegrators, stackers and reclaimers, graders, road rollers, and roadheaders. Not only that, but also in new energy equipment, amusement equipment, metallurgical equipment, etc. It also has its application in China, so what is the working principle and working method of the slewing bearing? Below, the editor will take you to understand some knowledge about slewing bearings, you can learn and understand.

First, the working principle of the slewing bearing
The working principle of the slewing bearing is to move the object from sliding to rolling to reduce frictional resistance. It mainly relies on lubrication and friction to achieve the purpose of operation. Internally, it relies on the mutual friction of balls and steel rings. The friction between the bearing and other parts runs, rubs against each other, and drives the object to operate. Although it relies on friction to operate, lubrication is also indispensable. If it is used for a long time and the friction is too large, it will also affect the application of parts. Therefore, after using this kind of bearing for a period of time, it should be maintained in time. , brush some lubricating oil.

Single row ball slewing bearing 01 series
2. How the slewing bearing works

1. Point contact scrolling
The working principle of point contact rolling is mainly used for four-point contact ball slewing bearing and crossed roller slewing bearing. This working principle has higher requirements on the quality of steel balls for the combined bearing of point contact radial and axial forces, and the angle of the track should be uniform.

2. Rolling and sliding combined rolling type
The rolling-slip combined rolling working principle is mainly used for ball-column combined slewing bearings. This principle has small eccentricity and long service life, and has the advantages of a dual structure of rollers and balls.

3. Surface contact rolling and sliding combination
The working principle of surface contact rolling and sliding combination is mainly used for turntable bearings. Now the new type of turntable bearing has a compact structure and high precision, so it is suitable to use the surface contact rolling and sliding combination.

4. Surface contact rolling combination
The surface contact rolling combined working principle is mainly used for three-row roller slewing bearing, its advantage is that the contact surface is large, the bearing force is uniform and the rolling is flexible.

The above is the working principle and working method of the slewing bearing. I hope it will be helpful to you. Our Hengguan Bearing mainly deals in slewing bearings, slewing bearings, and slewing bearings. If you have any questions or needs, please contact us. Hengguan Bearing is looking forward to you. call.

Working principle and working method of slewing bearing

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The turntable bearing is widely used in mechanical applications, such as excavators, disinctures, stack assemblers, flat, road rollers, and excavators, but not only that, in new energy equipment, amusement equipment, metallurgical equipment, etc. There is also its application, then what is the working principle and working mode of the turntable bearing? Below, Xiaobian takes everyone to learn about some knowledge about turntable bearings, you can learn about it.

First, the working principle of turntable bearing
The working principle of the turntable bearing is to move the object to the object, reducing the frictional resistance, mainly relying on lubrication and friction to achieve the purpose of operation, internally, with the mutual rubbing of the ball and the steel ring, relying on the rotary support at the outside The bearing is operated with the frictional force of the other components, and frictions with each other, and the object is operated. Although it is necessary to operate with friction, it is indispensable. It has been used for a long time. The friction is too large, and it will affect the application of parts, so after a period of use, it is necessary to maintain it in time. , Brush some lubricants.

Single rolled rolling bearing 01 series
Second, the working method of turntable bearing

1, point contact rolling
Point contact rolling work is mainly used for four-point contact ball turntable bearing and cross roller turntable bearing, which with a high demand of point contact radial axial force is high, and the track is uniform.

2, sloppy combination rolling type
The rolling combination rolling working principle is mainly used in the joint rotation support of the ball column. This principle is small, long life, and has the advantages of roller and dual structure.

Is it normal for the bearing to vibrate?

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Is it normal for the bearing to vibrate? In addition to some vibrations that may exist in normal operation, the shaking of the bearing during operation may require attention, which may reflect the possible problems of the bearing. Let’s learn about it with the editor of Hengguan.

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  1. Is it normal for the bearing to feel shaking?

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Bearing shaking needs to observe the amplitude of shaking. Slight shaking may be caused by the resonance between the bearing and the machine during the operation of the equipment. Shaking within the allowable range is normal, but the vibration frequency or speed is too large, or the bearing is installed opposite to the bearing. For machinery with high precision requirements, adjustment and maintenance are required.

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The bearing vibration (acceleration) is divided into four grades: Z, Z1, Z2, and Z3; the bearing vibration (speed) is divided into four grades: V, V1, V2, and V3.

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Z and V grades are suitable for the vibration inspection of deep groove ball bearings within the scope of the standard by bearing manufacturers; Z1 and V1 grades are suitable for the inspection of bearing products with general requirements for bearing vibration; Z2 and V2 grades are suitable for Y series motors and Other motor bearings with corresponding requirements; Z3 and V3 grades are suitable for higher precision requirements when there are strict requirements for vibration.

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  1. Reasons for bearing shaking
  2. The mounting bolts are loose, causing shaking during work. In case of shaking when the slewing bearing is working, firstly check all the inner and outer ring mounting bolts immediately. Check for looseness and tighten as required.

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  1. The rigidity of the steel structure supporting the slewing bearing is not enough, and elastic deformation occurs during loading, causing the slewing bearing to shake as a whole, increasing the strength of the steel structure supporting the slewing bearing by 14 times.

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  1. Check whether the operation is overloaded. Overloading will also cause the slewing bearing to shake. Therefore, it is necessary to operate in strict accordance with the regulations.

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  1. Long-term overload operation will lead to the crushing of the raceway and the clearance is too large. If such a situation occurs, please notify the after-sales service of the slewing bearing to make adjustments to ensure the normal use of the slewing bearing. In short, in order to ensure the normal use of the slewing bearing, if shaking occurs during use, it must be stopped in time for inspection to prevent long-term shaking from causing greater damage to the slewing bearing.

Slewing bearing

Three, bearing shaking solution

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  1. Clean the bearing housing and replace with a new oil seal.

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  1. Install a protective dust cover and improve the oil seal.

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  1. Check the bearing box, adjust the support surface and adjust the gasket.

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  1. Detect the shaft diameter, select the appropriate amount of fit, and re-lock the adapter sleeve.

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  1. Replace the bearing housing with the hole diameter that meets the design requirements.

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  1. Readjust the shims so that the shaft centers are coupled on the same straight line.

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I believe that after reading the above content, you will know whether it is normal for the bearing to shake. The editor of Hengguan Bearing also introduces the reasons and solutions to the shaking. I hope it will help you. Of course, in addition to this, we Attention should be paid to the abnormal conditions encountered during the use of the bearing so as not to affect the normal use of the bearing.

Cold treatment process and role of bearing sleeve

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The cold treatment of the bearing sleeve mainly refers to a processing process after the bearing material after forging heat treatment, mainly by staying in an environment after the quenching is placed in an environment where the quench is restored for a period of time, this process is called cold treatment, and the following turntable Everyone introduces the role of the cold treatment of the bearing ring and related process.
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First, the effect of cold treatment Be Precision bearing is high in size stability; after the ferrule quenching (especially grading), the internal tissue still retains more residual austeel, which is unstable, in storage and use bearing In the process, it will continue to change, thereby changing the accuracy of the bearing. For this purpose, a cold treatment process is used, which reduces the residual bombs in the tissue and slightly improves the hardness of the part.
Tuto bearing
Second, cold treatment process and requirements
1. After quenching, stay at room temperature: After quenching, be sure to make cold treatment inside and outside the ferrule, otherwise it is easy to crack, cold to room temperature, cold treatment (generally no more than 30 minutes), otherwise it will stop the austenite The transformation of the hometown.

2, cold treatment temperature: The temperature of the cold treatment is mainly based on the martensite transition temperature MF of the steel, and the impact of cold treatment on mechanical properties and processability is considered. For GCR15 steel, cold treatment is used to use -70 ° C; when the accuracy requires less than a ferrule or device, the cold treatment temperature can be selected from -40 to -70 ° C; ultra-precision bearing, can be at -70 ° C ~ -80 ° C Cold treatment is carried out. Overcloowise temperature affects the bearing impact fatigue and contact life.

3, cold treatment insulation: Although the change in mass martensite is completed when it is cold to a certain temperature, but in order to make a batch of ferrule surfaces and the center of the center, there is a certain holding time, generally 1 to 1.5 h.

4, the cold treatment after cold treatment: After the ferrule is cold, placed in the air, and the temperature is slow to rise to the room temperature. Wenheng can’t be too fast, otherwise it is easy to crack; tempering time, otherwise the residual stress inside the ferrule can cause the ferrule crack, generally no more than 2 hours.

Who makes the slewing bearing for pelletizer the best in China

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Recently, Luoyang Hengguan Bearing Technology Co., Ltd. (hereinafter referred to as Hengguan Bearing), designed and manufactured for a large group company in Northeast China, the special slewing bearing for the 6-meter disc ball machine (ball-forming disc) has been successfully completed and passed the test of finished product. It has been sent to a third-party construction site for installation and trial operation.

The disc pelletizer refers to the equipment used to manufacture green balls in the pellet production process. Disc pelletizers are widely used in non-ferrous metallurgy, cement, steel, fertilizer and other industrial fields. In the process of application, the design of disc pelletizers has been continuously innovated and perfected, so that the disc pelletizers have reliable functions. , High-quality equipment with rigorous structure, excellent effect, less wear, low energy consumption and easy maintenance. The new disc pelletizing machine is mainly composed of disc body, transmission system, slewing bearing, rotary scraper device, disc body inclination adjustment device, lubrication system and other parts. This time, Hengguan Bearing mainly manufactures one component of the slewing ring bearing. Hengguan Bearing has produced 6-meter and 7.5-meter ball machine slewing ring bearings.

The slewing ring bearing of the 6-meter ball machine is designated by the owner of our company’s slewing ring bearing, and the ball machine manufacturer is entrusted to purchase it. Since the owner’s on-site ball machine has been shut down due to a problem with the slewing ring, a new set of slewing ring bearings is urgently needed for replacement, so as to resume normal operation as soon as possible. After receiving the order, our company immediately arranged the time to put materials into production; and made innovations and improvements based on the actual use of the old slewing ring bearings on site. Shipped smoothly within 25 days.

For the on-site problem (1) the slewing bearing is prone to jam and standstill during the operation; this phenomenon occurs because the ball machine is not running horizontally when it is in working state, but during the operation. It is caused by a certain angle of inclination; in the normal slewing bearing raceway, it is composed of rolling elements and spacer blocks; when all rolling elements are tilted and transported, due to the action of gravity, it will cause extrusion, jamming, standstill, etc. condition. Hengguan Bearing has innovatively improved the slewing bearing cage, so that each rolling element can keep rotating in place, so that this problem can be easily solved.

For on-site problems (2) the oil leakage of the raceway is serious when the slewing bearing is running; due to the inclined operation of the slewing bearing of the ball machine, the ordinary rubber sealing strip is not tightly sealed, and the raceway leaks under the action of gravity. The oil phenomenon is serious, which is not good for bearing lubrication. In response to this phenomenon, the engineers of Hengguan Bearing proposed to use a double-layer special seal, the internal use of the secret palace type wool seal, and the outer ring to be sealed with a steel plate by direct pressure; the on-site oil leakage phenomenon was properly solved.

There are always more solutions than difficulties. Hengguan Bearing, aiming at the actual use of slewing bearing, solves the problem; constantly emancipates the mind, enhances the sense of innovation, the spirit of innovation and the ability of innovation. Achieve innovation in work ideas, innovation in goals and tasks, and innovation in work measures. By innovating the working mechanism, constantly adapting to new situations, studying new situations, summarizing new experiences, exploring new laws, expanding their brainpower, and improving work quality and efficiency, Hengguan people strives for each set of slewing ring bearings that leave the factory to make customers satisfy. Our aim is: to solve problems for customers, to create value, to be a valuable enterprise! Hengguan Bearings, intelligently create the future, only work hard for high-quality slewing ring bearings!

How to clean the slewing bearinig ? What are the scope of its application?

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Mechanical work by the inevitable intrusion of dust and impurities, as a heavy machinery or equipment used in large bearings, each having its own rotary bearing mounting hole, and lubricating oil holes sealing means, but still be affected complex environment. Once raised properly, may cause mechanical member rotatable with the debris into the interior of the rotary support, the increased friction between the rotary support and related accessories, forming the movable catching phenomenon may even lead to a mechanical stop. So you need to master the operation management method of cleaning, clean the impurities to protect production machinery is running.

Deposition can not be cleaned in a rotary bearing raceways dust, resulting in clogging of the oil injection duct, stuck in the roller track. Adding auxiliary equipment using the temporary high pressure descaling fluid injection into the rotary bearing, by repeating the rotation, so that relative movement between the sub-friction rotary bearing, the grease deposited on the inner race, the dust clean. After the injection of oil into the clean slewing, the descaling fluid clean.

Regular check-related accessories slewing ring is necessary, impurities intrusion protection accessories or damage caused by improper use of lubricants will have a large slewing ring consumption and shorten life.

Slewing range of applications is very wide, we look at what it can be used in place of it below!

1, lifting machinery

Lifting has included cranes, tower cranes and trailers, etc., because these machines use environment is more severe, rotating parts are often severely affected, so these sites will be used to customize the slewing ring, such as to Xuzhou Wanda slewing bearing manufacturers to provide jobs and environmental dimensions required for the machine, slewing bearing manufacturers combined with the actual situation will arrange for engineers to design in line with the bearing, and then put to use, not only to meet the needs of lifting machinery, but also make use of life is greatly enhanced.

2, construction machinery

Simple mechanical engineering division is like excavators, loaders. Slewing bearing capable of withstand the axial and radial forces and overturning forces and very compact, an excavator in the job and requires continuous core member is rotated, the rotary bearing is rotated. Application of the construction machinery applications belongs to the basic slewing ring, is more widely used.

3, processing machinery

Processing machinery like material processing, food processing, metallurgy, etc.,. With the continuous development of technology, people are not satisfied only the slewing ring used in engineering machinery, instead looking to the device platform processing machinery. Because the slewing bearing more compact than the original, may be subjected to an external force greater, more performance and good structure, so that the processing machine also has multiple applications.

4, military equipment

Competition is now military hard power of military equipment, as we see on television as the tanks turned the gun head, a shell hit the target accurately, this session is slewing ring plays a good supporting role; as well as artillery, radar, rocket launchers, etc., timely and stable rotation jump in launching military equipment is very important structural slewing ring, compared to conventional bearings have a good performance.

5. Other

In addition to connecting portions revolving bearing in industrial and medical applications, etc. In addition, in the field of power generation and the life has its shadow, the wind turbine tower and the yaw bearing is mounted in the cockpit, the pitch bearing mounted on the root of each blade and the hub connecting portion. Each wind turbine pitch bearing and a yaw bearing three. By application of slewing on the wind power plant, may be implemented in different process implemented to change the wind power generation, in the process, the root of the blade portion associated therewith is embodied swivel support bearing. Aspects of life slewing ring main applications focused on the playground, like a Ferris wheel, roller coaster, carousel and large pendulum clock, etc., the application of the slewing ring life safety has been well protected.

The above is how to organize small series of slewing ring contaminated debris clean-up as well as the entire contents of its scope of application, hoping to be helpful to everyone. Constant crown bearing, customer demand-oriented, be flexible customization to meet the real needs of customers and innovative sophisticated. Constant crown bearing, made Moses future, only high-quality slewing ring bearings and work!

Drawing pile drum slewing bearing selection and use

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The pushing machine is to utilize vibration, static or hammering action to pull the pile of the formation of the formation of the formation of the formation. The pilot operation is often used to vibrate pile driver, static pressure pile machine or double-active hammer, and then equipped with pile frame and rigging, so it is also known as vibration sinking pile machine and static press pile machine. The use of swinging on the pile driver is or is the power element of the upper body and the underwriting body to perform the relative swivel movement, then how specifically uses it? Let’s introduce you to you.

1. Selection of pile drum rotation support
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The pile drum rotation supports the rotation of the device through friction and lubrication, and can drive the mechanical rotation in the pile drum, provide support capabilities, mainly rotating, supported, to withstand axial, radial, tip, and impact Loads, since the quality requirements of the rotary support are relatively high, and the two-volleyball-type rotary support is generally selected when selecting the rotary support type, which is fastened to withstand a large axial force and torrent torque.
Pumped pile driver
2, method of use of pile driver rotary support
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Pumped pile drivers are rotated similar to the use of pile drivers and excavators, and the rotary support is a force element that is on the vehicle body and the underwriter to support the vehicle body and to withstand the working load. The inner seat is connected to the vehicle body, the outer race is connected to the vehicle body, and the inner ring on the inner seat is engaged with the rotary motor pinion. When the rotary motor is rotated, the carriage is driven by the pinion. The rotary support of the pile driver uses an internal teeth rotation, because there is a hit load, and the general tooth surface is hardened.
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When the pile driver is more common in the construction, the pile of the pile is fixed to the pile head, and the pile driver is suspended in the hook by the spring absorbers and rigging. Causes pile and soil resonance, soil structure damage, the friction between the pile body and the soil is reduced, and the pendulum is tightened, and the pile is gradually pulled out. If the eccentric block vibrator is used, the eccentric block must be adjusted due to the difference in the resistance between the sink and the pile. Such pulling pile equipment is simple, high-pull pile efficiency, and development prospects.
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Hydraulic pile driver uses its clipper to clamping the pile head, the hydraulic cylinder forces the top pressure clipper, so that the top is rising from a distance, pull the piles, and apply the pile to the clay, sand or the soil Copstanding paper or steel piles in the layer. There is also a mechanical method to pull the pile, that is, driven the hoist by the motor, and pulls the pile to force the floor using the tension of the wire rope pulley. It is convenient to use, low cost, but the pile strength is not large, the equipment is cumbersome, and the push pile is low, only for soft land layer construction. Using the double-acting steam hammer, the hammer is inverted, fixed to the pile head, and hang it under the rigging, first shake the soil, reduce the tightness of the pile and soil, then start the steam hammer, hammer up Vibration, tightening the rigging, gradually pulling the piles, can be pulled with concrete piles and other piles in various soil layers.
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In general, the pushing machine is a large mechanical equipment, like the excavator crane, which produces a large working load and friction during the rotation, and the ordinary bearings cannot meet the needs of large-scale mechanical equipment, so it needs to be used. Go to the rotary support, and to customize according to the actual situation when selecting the model, a special process can be performed on some wear, and the quality of the rotary support is increased.