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.

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

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.

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

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.

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

Oil tank truck, as the name suggests, is a vehicle for transporting oil. Such vehicles are mainly used for crude oil transportation, so they are dangerous. However, if there is no such vehicle, many private cars will not be able to refuel. For users such as gas station owners or logistics and transportation companies, there is still a lot of concern about how much a 5-ton tank truck costs. Then let’s take a look at the price of a 5-ton tank truck!

How much is a 5 ton tank truck?

From a comprehensive market perspective, the price of a 5-ton tanker is around 100,000-120,000 per unit. So how did this offer come about? What fees are included?

We all know that the price of refueling trucks/tank trucks is composed of the chassis price and the top-loading price, but what about the subdivision? Maybe many users are not very clear, the following tank truck sales manufacturers will give you a detailed introduction.

1. For a tank truck/refueling truck, the chassis is manufactured by the original chassis of different companies. The price of the chassis is determined by the company. For the upper part, it includes the European standard tank mouth and the subsea valve (1 under 12 square meters). Tank mouth, 1 subsea valve, 2 European standard tank mouths from 12 to 26 square meters, 1 subsea valve, two European standard tank mouths above 26 square meters, two subsea valves) warehouse, tanker, flow meter, pump, water tank , toolbox, bead valve, etc.;

2. Add 1,000 yuan for each additional warehouse; add 500 yuan for an additional self-flow (aluminum alloy);

liquid transporter

3. Add 6,000 yuan for the reel of a tax-controlled refueling machine, 1,000 yuan for the optional large flow, and 1,500 yuan if you choose a large brand refueling truck; 2,000 yuan for the installation of a flow meter; 2,000 yuan for the installation of a flow meter :3000 yuan;

4. Price increase for stainless steel ball valve: two DN65 price increases by 800 yuan, DN80 price increase by 1500 yuan; DN100 price increase by 2000 yuan;

5. For every millimeter of thickness of the tank, the price will be increased by 1500 yuan;

6. The price is reduced by 3,000 yuan without the pump, and the price of the tool box and water tank is increased by 300 yuan; the European standard full set is increased by 8,000 yuan;

7. Other insurance costs: The tanker is a special model, which is more dangerous in terms of safety. It is loaded with flammable and explosive oil or gas substances. Therefore, the other costs of the tanker are different. There will be more insurance costs, including commercial insurance and compulsory traffic insurance or carrier liability insurance or anchoring and other related costs, and the price of vehicles of different tonnages is also different.

Details can be accessed by clicking here:https://www.ly-cimc-linyu.com/news/5-tons-oil-tank-truck-price/

Forging is a processing method that uses a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size. Forging (forging and stamping) is one of the two major components. Through forging, defects such as as-cast looseness generated in the metal smelting process can be eliminated, and the microstructure can be optimized. At the same time, due to the preservation of the complete metal streamline, the mechanical properties of forgings are generally better than those of castings of the same material. For important parts with high load and severe working conditions in related machinery, forgings are mostly used in addition to rolling plates, profiles or welded parts with simple shapes.

The initial recrystallization temperature of steel is about 727 °C, but 800 °C is generally used as the dividing line, and hot forging is higher than 800 °C; between 300 and 800 °C, it is called warm forging or semi-hot forging. called cold forging.

Forgings used in most industries are hot forging. Warm and cold forging are mainly used for forging parts such as automobiles and general machinery. Warm and cold forging can effectively save materials.

PROCESS CLASSIFICATION

According to the forging temperature, it can be divided into hot forging, warm forging and cold forging.

Hinge-4

According to the forming mechanism, forging can be divided into free forging, die forging, ring rolling and special forging.

1. FREE FORGING

It refers to the processing method of forgings that use simple universal tools or directly apply external force to the blank between the upper and lower anvils of the forging equipment to deform the blank to obtain the required geometric shape and internal quality. Forgings produced by the free forging method are called free forgings. Free forging is mainly based on the production of small batches of forgings. Forging equipment such as forging hammers and hydraulic presses are used to form and process the blanks to obtain qualified forgings. The basic processes of free forging include upsetting, drawing, punching, cutting, bending, torsion, offset and forging. Free forging is all hot forging.

Advantages: Free forging has the characteristics of flexible process, high versatility of equipment and tools, and low cost. Since free forging is formed gradually, the required deformation force is small, so it is the only way to produce large forgings (above 300T).

Disadvantages: low productivity, low precision forgings, high labor intensity, mostly used for single-piece and small batch production of forgings with simple shapes and low precision requirements.

2. DIE FORGING

Die forging is divided into open die forging and closed die forging. The metal blank is compressed and deformed in a forging die cavity with a certain shape to obtain a forging. Die forging is generally used to produce parts with small weight and large batches. Die forging can be divided into hot forging, warm forging and cold forging. Warm forging and cold forging are the future development direction of die forging, and also represent the level of forging technology.

According to the material, die forging can also be divided into ferrous metal die forging, non-ferrous metal die forging and powder product forming. As the name implies, the materials are ferrous metals such as carbon steel, non-ferrous metals such as copper and aluminum, and powder metallurgy materials. Extrusion should belong to die forging, which can be divided into heavy metal extrusion and light metal extrusion.

Closed die forging and closed upsetting are two advanced processes of die forging. Since there is no flash, the utilization rate of materials is high. It is possible to complete the finishing of complex forgings in one or several operations. Since there is no flash, the stressed area of ​​the forging is reduced and the required load is also reduced. However, it should be noted that the blank cannot be completely restricted. For this reason, the volume of the blank should be strictly controlled, the relative position of the forging die should be controlled and the forging should be measured, and efforts should be made to reduce the wear of the forging die.

Details can be accessed by clicking here:https://www.gold-emperor.com/types-of-forging-processes/

Crossed roller bearings have a strong, inseparable inner and outer ring structure that easily achieves high stiffness and high precision, independent of the surrounding environment and its structure. It is especially suitable for equipment with medium to high speed. It has been used more and more widely in recent years. Due to the different performance of the equipment, the types of bearings used are also different. How to choose the appropriate bearing type and structure for the equipment? It is a question that most customers are confused about. How to select a crossed roller bearing can refer to the following requirements.

1. Determine the size range of crossed roller bearings

The external dimension of the crossed roller bearing is one of the important parameters. First of all, you need to know the size of the bearing you need to use. It can also be said that what is the installation size of the equipment that needs to install the bearing, and then you can determine the size of the bearing.

crossed roller bearings

2. Select the structural form of the bearing

Because crossed roller bearings have the same external dimensions, there are also many kinds of structures, including outer ring split type (RB/RA), inner ring split type (RE), and integral structure (RU/CRBH). The key is to see The part that the bearing needs to drive the rotation needs to be installed on the inner ring or the outer ring of the bearing. If the outer ring needs to be rotated, the inner ring split type must be used; similarly, if the inner ring rotation accuracy is required, the outer ring split type must be used.

For more details click to visit:https://www.prsbearings.com/a/news/model-selection-of-crossed-roller-bearings.html

The use of crossed roller bearings is also relatively common now. Generally, it is mostly used on mechanical equipment, and is mostly used at joints. The main reason is that crossed roller bearings can operate quickly and with high precision, which can meet the use of mechanical equipment. , so it is used more now, these are all because of the advantages of crossed roller bearings, so what are the advantages of using crossed roller bearings? In response to this problem, the manufacturer of crossed roller bearings gave us the following detailed introduction.

Specific advantages of using crossed roller bearings

1. The characteristic of the crossed roller bearing is that there are two raceways in the bearing and two rows of rollers arranged in a cross. Compared with the traditional thrust bearing + radial centering bearing combination, the crossed roller bearing is compact in structure, small in size, and simplifies the table design, thereby reducing the cost of the turntable.

2. In addition, due to the use of optimized preload, this type of bearing has high rigidity, so the rigidity and precision of the turntable are also guaranteed. Thanks to the design of two rows of crossed rollers, the effective span of the bearing can be significantly increased, so this type of bearing has a high anti-overturning moment.

In the crossed roller bearing, it is divided into two types: one is a cylindrical crossed roller bearing, and the other is a tapered crossed roller bearing.

crossed roller bearing

3. In addition, crossed roller bearings are not only suitable for turntable applications with relatively low speed, but also have the advantages of high running accuracy, strong speed capability, and reduced shaft length and processing costs. Crossed roller bearings are suitable for all types of vertical or horizontal boring machines, as well as applications such as vertical grinding, vertical turning and large gear milling machines.

For more details click to visit:https://www.prsbearings.com/a/news/advantages-of-crossed-roller-bearings.html

At present, the clutch assemblies installed in most 600-804 series tractors are frequently engaged, single-plate, dry double-acting clutches, but the internal structure is different. The compression deformation of the single disc spring is generated, while the pressure of the clutch disc assembly in other models is generated by the compression deformation of 12 cylindrical coil springs. Their usage and adjustment requirements are basically the same.

The use of tractor clutch operating mechanism

1. When disengaging the clutch, quickly step on the clutch pedal to the position where the front driven plate assembly is completely separated to avoid difficulty in shifting.

2. When the clutch is engaged, the clutch pedal should be slowly released at the beginning to ensure that the tractor starts smoothly. After the tractor starts, the foot stepping on the pedal should leave the pedal quickly to prevent the clutch from slipping.

3. It is not allowed to use the method of semi-coupling clutch to reduce the running speed of the tractor. Do not keep your foot on the clutch pedal while driving to avoid accelerated wear of the release bearing, pressure plate and friction lining.

4. When the tractor is parked, it should be in neutral gear, and the clutch should not be disengaged for too long.

5. When disengaging the power take-off clutch, the driver only needs to step on the clutch pedal to the end.

MF series

Tractor clutch adjustment

1. Adjustment of the free travel of the clutch pedal

In order to ensure the normal operation of the clutch, the clearance between the end of the clutch release lever and the thrust bearing end face of the release slip sleeve assembly must be kept within the range of (2.5±0.5) mm, corresponding to the free stroke of the clutch pedal of 20mm─ 30mm. In the process of use, due to the constant wear of the clutch friction plate, the pressure plate moves forward, and the gap gradually decreases or even disappears. Therefore, it must be checked regularly. There are two ways to adjust the free travel of the clutch pedal:

For more details click to visit:https://www.syclutch.com/news/use-and-adjustment-of-tractor-clutch-control-mechanism.html

In the design of modern friction clutches, the structure of the tractor clutch assembly and the structure of related components should be reasonably selected according to the category of the tractor model, the use requirements, the matching requirements with the engine, the manufacturing conditions, and the standardization, generalization, and serialization requirements. It is described as follows:

The number of driven discs and the choice of dry and wet

MF series

(1)Single-plate dry friction clutch

The single-plate dry friction clutch has a simple structure, easy adjustment, compact axial size, complete separation, small rotational inertia of the follower, good heat dissipation, and smooth engagement even when an axially elastic follower disk is used. Therefore, it is widely used in micro, light and medium tractors and trucks at all levels, and is also popularized in large tractors and heavy trucks with engine torque not greater than 1000N.m. When the torque is higher, a double-plate clutch can be used.

(2) Double-plate dry friction clutch

Compared with the single-plate clutch, due to the increased friction surface, the ability to transmit torque is increased, and the engagement is also smoother and softer; in the case of transmitting the same torque, its radial size is smaller and the pedal force is smaller. However, the axial size is increased and the structure is complicated; the poor ventilation and heat dissipation of the intermediate pressure plate can easily cause overheating and accelerate the wear and tear of the friction plate, and even burn and break; the separation stroke is large, and the separation is not easy to be completely separated if it is improperly adjusted; the rotational inertia of the follower is large and easy to use Difficulty shifting gears etc. It is only used when the transmitted torque is large and the radial dimension is limited.

For more details click to visit:https://www.syclutch.com/news/structural-type-selection-of-friction-clutch.html

Mobile shelves are actually shelves that can be moved on tracks, which can improve the utilization of space. A group of shelves only needs one channel. In the same space, its storage capacity and efficiency are much higher than ordinary shelves. Now mobile shelves It is also very common in our work. Let’s take a look at the classification of mobile shelves!

Classification of mobile shelves

1-2

1. Mobile shelves can actually be divided into light and medium mobile shelves and heavy mobile shelves

(1) Light and medium-sized mobile racks are evolved from light and medium-sized laminate racks, also known as dense racks. They have high space utilization and only need to set a passageway of about 1 meter in the middle. It is divided into two types: manual and electric. The contact surface between each row is also equipped with a buffer, and the magnetic sealing strip is also provided with a dust-proof plate at the top and a rat-proof device at the bottom. There is also a safety limit in each row. The braking device and the anti-dumping device are equipped with locks on the side for overall locking. The transmission mechanism is processed by finishing, using precision bearings, the transmission is flexible and stable, and the spacing between the layers can be freely adjusted according to needs.

(2) Heavy-duty mobile racks are evolved from heavy-duty pallet racks, and every two rows of racks are placed on the base. There are also walking wheels on the base, which can run along the track, and there are also installed in its chassis. Motors and reducers, alarms, sensing devices, etc. The storage system of heavy-duty mobile racks only needs 1-2 channels, and its space utilization rate is extremely high. The heavy-duty mobile racks must be electric, and the goods are accessed by forklift trucks. Compared with ordinary shelves, it can increase the usage rate of the ground by about 80%.

For more details click to visit:https://www.etegreen.com/blog/mobile-shelves-classification/