Why is there abnormal noise during the use of the slewing bearing?

The slewing bearing is a component that needs to be used in many mechanical equipment. It is a large bearing that can withstand comprehensive loads. In addition, it can withstand large axial and radial loads and overturning moments at the same time. It is also more common. In the case of common use, the fault problem is more obvious, such as fracture or abnormal noise during use. The following slewing bearing manufacturers mainly talk to you about why slewing bearings appear abnormal sound.

When this kind of abnormal noise occurs, it should be clear first that when the slewing bearing is idling just after leaving the factory, there will be a uniform sound of steel ball rolling, which is a normal sound; It usually disappears after a period of rotation and running-in. What we are talking about today is a relatively loud and special noise. When you hear a special noise, you need to pay attention. So what is this abnormal noise? Learn more below!

1. Uneven bolts on the mounting surface are loose

When abnormal noise occurs, it needs to be due to the problem of installation operation. When the unevenness of the installation surface does not meet the requirements, it will cause the raceway to form a negative clearance, resulting in abnormal noise; in addition, when the pinion is poorly meshed, Abnormal noises may also occur, which may also cause broken teeth; in addition, when the mounting bolts are loose, the slewing bearing will be elastically deformed, and a negative gap will be generated at the deformed position. It is necessary to check immediately and tighten the bolts as required.

2. There is a foreign body in the slewing bearing

When there are foreign objects such as sand particles and iron filings inside the slewing bearing, non-periodic vibration will occur, and at the same time, there will be a failure of inflexible rotation. When this happens, it is necessary to strictly clean the bearings, shafts, seat holes and matching parts before installation, and remove foreign objects in the lubricant in time; remember to avoid using plastic cages with impure materials or embedded foreign objects. This will remove the corresponding abnormal noise.

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Details can be accessed by clicking here:https://www.prsbearings.com/a/news/slewing-bearing-abnormal-noise.html

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What are the reasons for the inability of the excavator to rotate?

The excavator is one of the commonly used mechanical equipment in engineering construction. The slewing device is an important part of the excavator. It consists of a slewing platform, a slewing mechanism, a slewing bearing and other components. Whether the excavator can rotate left and right during work is inseparable. The credit of the slewing mechanism.

After the excavator has been working for a period of time, under the influence of the working load and the surrounding environment, there will be a phenomenon of inability to rotate. There are also several manifestations of inability to rotate, such as the sudden stop and sudden movement of the rotating platform of the excavator, and the low rotation speed of the platform. At 6r/min, slow power is insufficient, etc. What are the reasons for the inability of the excavator to rotate?

slewing bearing

1. The energy input to the hydraulic motor is reduced

When the rotation is weak, the hydraulic motor needs to be checked. The hydraulic motor converts the hydraulic pressure energy into mechanical energy output, so that the platform can be rotated. When the energy input to the hydraulic motor is reduced, it is difficult to overcome the rotational resistance of the platform, which will cause the situation to be weak or even stopped.

2. Failure of safety valve and oil filling valve

When there are problems such as the safety valve and the oil filling valve sealing, it will affect the speed of the excavator slewing platform. If these valves are worn, the valve core and valve seat will be squeezed by pressure, the sealing performance will be reduced, and the working pressure oil will leak from the oil charge valve, causing the excavator to fail to rotate.

3. The damping hole of the pressure limiting valve is blocked

Another point is that the pressure limiting valve orifice is blocked. Because the pressure limiting valve is often opened, the valve seat and valve sleeve are easily worn, and external impurities will enter the oil pump, causing the orifice of the pressure limiting valve to be blocked. When repairing the limit valve, carefully check the degree of wear, and it needs to be replaced if it cannot be repaired.

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Details can be accessed by clicking here:https://www.excavatorbearing.com/a/bearing-knowledge/the-excavator-is-unable-to-rotate.html

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YTO tractor clutch maintenance tips

The clutch is an essential and important part on the YTO tractor. It is used to transmit and cut off the power of the YTO engine to the gearbox and the power take-off, and to prevent the parts from being damaged when the drive train and the power take-off are overloaded. The clutch transmits torque by the friction force generated by the active friction plate and the driven friction plate. The magnitude of the friction force depends on the value of the pressing force of the friction plate and the properties of the surface material of the friction plate.

However, with the increase of the number of times of use or improper use, the tractor clutch transmission mechanism will wear out, and the YTO clutch friction plate will also become thinner due to wear, which will weaken the friction force of the main and driven parts of the clutch, and make the YTO clutch in the process of transmitting torque. Shaking, slipping, incomplete separation and other faults occur during the operation, which will affect the normal use of the vehicle. Therefore, the YTO clutch should be adjusted and maintained as needed after a period of use, which can effectively reduce the damage of the clutch, increase the use efficiency, and prolong the use. period and achieve better economic benefits.

40-Type-18-Spline

1. Regular lubrication.

The working environment of the tractor is quite harsh. Every 10-20 hours of operation, grease should be added to the front bearing and release bearing of the clutch. The grease should not be added too much. Too much grease will easily overflow and pollute the friction lining, causing the clutch to slip. Usually 3-5 hits with a grease gun will do. For the closed structure release bearing, every 200~300h of work, use the oil immersion method to add lubricating oil. The specific method: remove the release bearing, use diesel oil to clean the bearing, and immerse it in melted high-temperature resistant butter after cleaning and rotating flexibly. The butter is filled with the bearing, take it out and install it after the butter has solidified.

2. Regularly clean the friction lining.

During the operation of the tractor, the clutch is easily contaminated by mud and water, resulting in rust spots and slippage. Therefore, for the clutch, it is necessary to do regular inspections and regular cleaning.

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Details can be accessed by clicking here:https://www.syclutch.com/news/yto-tractor-clutch-maintenance.html

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What does it mean for plants to use a plant grow rack?

The plant grow rack is a rack-like tool specially formed for plant cultivation. It is mainly used to cultivate tissue culture plants. So what does this product mean for plants?

1. Plant culture is an important means to study the laws of plant growth and differentiation

Tissue culture is a technique for culturing explants to regenerate organs or plants under artificially controlled conditions. It can study the law of growth and differentiation of the cultured parts without the interference of other parts of the plant body, and can use various culture conditions to affect their growth and differentiation. developmental process.

Grow racks

2. Plant culture is the basic technology for carrying out bioengineering

Various gene transfer and gene recombination techniques are established on the basis of tissue culture.

3. Plant culture can rapidly propagate plant seedlings

At present, tissue culture has been widely used in the rapid propagation of clones, the cultivation of virus-free seedlings, the selection of new varieties, the preservation of artificial seeds and germplasm, and the industrial production of medicinal plants and secondary substances.

4. Plants grow well

Since the plant growth rack can provide suitable light according to the needs of the plants, the plants cultivated in the light culture rack have a short induction rate, a fast growth rate and good growth.

Mobile vertical grow racks

5. Automatic control of lighting time

Due to the different growth cycles of different plants, a timer can be selected as needed to automatically control the lighting time, which greatly saves manpower.

6. Three-level gradient lighting

Three primary colors of natural light, full spectrum, simulate external natural light, provide the full spectrum required for plant grow, and can choose different light intensities according to different cultivated plants.

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Details can be accessed by clicking here:https://www.etegreen.com/blog/the-mean-of-plant-grow-racks-to-plants/

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Application of valve bag packaging machine in flour industry

At this stage, valve bags are still very few in the field of wheat flour applications. The key factor is that valve bags are more expensive than packaging bags, but valve bags have waterproof, anti-corrosion, unilateral air permeability, good airtightness, environmental protection and biodegradation. , suitable for high stacking, long-distance shipping container transportation and other advantages, some baking powder, chicken powder, high-grade wheat flour use valve bag packaging.

Types of valve bags

Paper composite valve bag: It is made of woven bag (commonly known as acupuncture non-woven fabric) as a board, and is made of a composite type by casting method (cloth/film/paper composite type is three-in-one).

Packaging paper valve bag: It is made of kraft paper, (the packaging paper is mainly divided into imported kraft paper and domestic packaging paper). The number of superimposed layers of packaging paper varies from one layer to six layers according to the main purpose, and the middle can be coated or Add PE plastic film.

PE valve bag: alias heavy bag valve bag, made of poly-Zene plastic, the wall thickness of the film is generally in the middle of 8-20 silk.

Low melting point valve bag: made of low melting point poly-Zene plastic, the wall thickness of the film is generally in the middle of 8-20 silk, suitable for large-scale production and application in chemical factories on production lines, which can reduce environmental pollution and reduce employee labor efficiency.

Composite valve bag: It has the printability of printing paper and the waterproof and firmness of plastic. It is a new material.

Finishing part of drum making machine

The working principle of valve bag packaging machine

1. The valve bag packaging machine uses the motor as the power source to drive the impeller in the discharge seat to rotate smoothly to achieve uniform feeding;

2. The sensor measures the weight of the material in the bag and inputs the measurement signal into the microcomputer. When the filling weight requirement is met, the microcomputer outputs the signal, and the sealing cylinder extends into the working state to seal the discharge port;

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Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/application-of-valve-bag-packaging-machine-in-flour-industry.html

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WHAT ARE THE APPLICATIONS OF CALCIUM HYDROXIDE IN WASTE INCINERATION

Nowadays, life is constantly progressing and developing. Of course, it also produces a lot of negative things. There are more and more garbage around us. If we do not deal with it in time, we will soon be buried by garbage. Generally speaking, garbage incineration is still a Now we use the common way of dealing with garbage. In order to prevent the continuous infestation of harmful substances, we can add calcium hydroxide to it.

I believe that friends who see it here will be confused and wonder if they are wrong. Yes, you read that right! In order to let everyone know how widely used calcium hydroxide is, the following calcium hydroxide production line manufacturers will introduce to you the applications of calcium hydroxide in waste incineration.

GFEX Case

APPLICATION OF CALCIUM HYDROXIDE IN WASTE INCINERATION:

1. Garbage incineration is a method used by most cities to dispose of garbage. Therefore, incinerators have been built in various places. After the garbage is treated by incineration, the amount of garbage can be reduced, and land use can also be saved. Such a process can also eliminate a large number of pathogens and convert toxic and harmful substances into non-toxic and harmful substances.

2. For the flue gas generated during the combustion process, the flue gas temperature drops sharply from more than 400 degrees Celsius to about 120 degrees Celsius. After that, the activated carbon and calcium hydroxide are deacidified in the reaction tower, and the activated carbon adsorbs harmful gases such as dioxins; The flue gas enters the dust collector, is adsorbed to remove particulate matter, heavy metals, etc. in the flue gas, and then is discharged into the atmosphere through the chimney.

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Details can be accessed by clicking here:https://www.ly-gaifeng.com/blog/application-of-calcium-hydroxide-in-waste-incineration.html

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How to regulate the use of desks and chairs?

Nowadays, student desks and chairs are not only tools for our learning, but have been given other meanings on them. Watching the development history of student desks and chairs can actually reflect the importance a country attaches to education.

However, a good learning environment is fundamental to education and learning. Student desks and chairs are friends who will accompany students throughout their study life. Desks and chairs are teachers for cultivating students’ sitting posture, and a good sitting posture is the right reflection of the person’s mental outlook, and it is also an important part of observing a person’s basic impression. And a good sitting posture will also cultivate people to develop a good living habit and lofty aspirations. Therefore, a good set of student desks and chairs is essential for a person’s success. And also need to regulate the use of desks and chairs, how to regulate it?

High Quality School Table with Chair

1. Health supervision agencies and educational institutions should grasp the access standards for the procurement of desks and chairs, the allocation and use standards for desks and chairs, daily hygiene management, and monitoring of teaching and living environments, and increase supervision.

2. Change the traditional concept of one-sided pursuit of “uniformity and easy management” of desks and chairs, and improve the scientific cognition of school leaders and teachers on implementing national standards and configuring desks and chairs according to ergonomics. In accordance with national standards, each class of all primary and secondary schools is adjusted according to the actual sitting height of students, and the improper management and use of desks and chairs is rectified.

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Details can be accessed by clicking here:https://www.aoyangschoolfurniture.com/aoyang-news/regulate-for-the-use-of-desks-and-chairs.html

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How to maintain the slewing bearing during use?

We know that the quality of the slewing bearing itself is the main factor affecting the service life of the bearing, but no, because in addition to the quality of the bearing, there is also a very important issue, that is, the maintenance and maintenance of the bearing during its use, but, How to maintain the slewing bearing during use?

Lubrication of slewing bearing

Slewing Bearings

1. Lubrication

(1) Reduce friction and wear. In the mutual contact parts of the rings, rolling elements and cages that constitute the bearing, metal contact is prevented, and friction and wear are reduced.

(2) Extend the fatigue life. The rolling fatigue life of the bearing is extended when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the lubricating oil film thickness is not good, it will be shortened.

(3) Discharge frictional heat and cooling. The oil circulation method, etc., can use oil to discharge heat generated by friction or heat from the outside, and cool it. Prevent the bearing from overheating and prevent the aging of the lubricating oil itself.

(4) Others. It also has the effect of preventing foreign matter from entering the inside of the bearing, or preventing rust and corrosion.

2. Lubrication method

Bearing lubrication methods are divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, it is necessary to select a lubrication method suitable for the conditions of use and the purpose of use. If only lubrication is considered, the lubricity of oil lubrication is dominant. However, grease lubrication has the advantage of simplifying the structure around the bearing. Compare the advantages and disadvantages of grease lubrication and oil lubrication.

Cleaning of slewing bearing

1. Selection of cleaning materials

As the cleaning agent, cleaning agent and kerosene are generally used. In addition, pay attention to sealing the cleaning agent when not in use to avoid the entry of external magazines and contaminating the cleaning agent. In the case of inattentiveness, cleaning the bearing with the contaminated cleaning agent will not only not have a cleaning effect, but will contaminate the bearing and cause the bearing to be polluted. Running brings stress.

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Details can be accessed by clicking here:https://www.ldb-bearing.com/ldb-bearing-knowledge/how-to-maintain-the-slewing-bearing-during-use.html

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Introduction to the structure and working principle of vibrating screen

Vibrating screen is a kind of filtering mechanical separation equipment. It has a wide range of applications and is often used in mining, coal, smelting, building materials, chemical industry, light industry, food, medicine and other industries.

Although the vibrating screen is widely used in our lives, many people are not clear about its structure and working principle. Next, the vibrating screen manufacturer will introduce the structure and working principle of the vibrating screen to you.

The structure of the vibrating screen

Linear vibrating screen

1. Vibration exciter

The main function of the exciter is to enable the working body to vibrate continuously. There are generally two types of vibration exciters for uniaxial vibrating screen and biaxial vibrating screen according to the eccentric reconfiguration method.

2. Sieve box

The screen box of the vibrating screen is mainly composed of the screen frame, the screen surface and its pressing device. The screen frame is composed of side plates and beams, which need to have sufficient rigidity.

3. Supporting device

There are two types of support devices for vibrating screen: seat type and hanging type. Because the seat type installation is relatively simple, and the installation height is also low, the seat type support is preferred. The support device of the vibrating screen is mainly composed of elastic elements, commonly used are coil springs, leaf springs and rubber springs.

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Details can be accessed by clicking here:https://www.hsd-industry.com/news/the-structure-and-working-principle-of-vibrating-screen/

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What are the reasons for conveyor downtime?

The conveyor is mainly used for the transportation of materials. It has the point that the direction is changeable and the conveying direction can be flexibly changed. We commonly have screw conveyors and belt conveyors, etc. Among them, belt conveyors are the main way of conveying bulk materials. When we use or maintain the machine improperly, the conveyor may fail and cause downtime. Do you know the reason for the downtime of the conveyor?

Reasons for screw conveyor downtime

The screw conveyor has the advantages of small cross-sectional size of the whole machine, good sealing performance, multi-point loading and unloading in the middle, and easy operation and maintenance. It is suitable for conveying powdery, granular and small block materials. It is widely used in building materials, metallurgy, Chemical, electric power, coal, machinery, grain, food and other industries; it is not suitable to transport materials that are perishable, viscous, and easy to agglomerate.

The reasons for the stoppage of the screw conveyor are:

screw conveyor

1. The material is too large

Problem: The material to be conveyed is too large, the material cannot pass through the middle hanging bearing smoothly, and the material resistance at the middle bearing is too large, causing the screw conveyor to stop suddenly.

Solution: judge the size of the material before conveying to avoid the material being too large and stuck in the middle of the hanging bearing, resulting in downtime.

2. Material blockage

Problem: Blockage of material in the screw conveyor can also cause the motor to be overloaded and shut down.
Solution: We must clean up the material in the screw conveyor, keep the conveyor unobstructed, and install a belt cleaner to avoid blockage due to excessive viscosity of the material.

3. Seal damage

Problem: The resistance at the intermediate bearing is too large and the seal is damaged. Material entering the bearing causes the bearing not to rotate or the bearing is damaged.

Solution: The seal needs to be replaced, and the abnormality at the intermediate bearing should be checked for repair.

4. Bearing burnt

Problem: The reducer bearing is burnt, resulting in downtime.

Solution: Replace the new parts to ensure the normal operation of the machine.

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Details can be accessed by clicking here:https://www.zymining.com/blog/reasons-for-conveyor-downtime.html

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