How to choose the type of crossed roller bearing?

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.

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What are the advantages of crossed roller bearings?

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.

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Use and Adjustment of Tractor Clutch Control Mechanism

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:

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Structural Type Selection of Friction Clutch

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.

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What are the classifications of mobile shelves?

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%.

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【Encyclopedia】Detailed introduction of plant growth lights

The plant growth light is a special kind of lamp used on the plant growth rack. According to the law of plant growth, sunlight must be required, and the plant growth light is a lamp that uses the principle of sunlight to replace sunlight for the growth and development environment of plants. .

Basic information

Name: Grow Light, the light replaces sunlight for the growth and development of plants

Function: Promote growth, prolong flowering period, and improve quality. After application testing, the wavelength of plant light is very suitable for plant growth, flowering and fruiting. Generally, indoor plants and flowers will grow worse and worse with time. The main reason is the lack of light. Irradiation, irradiated by LED lights suitable for the spectrum required by plants, can not only promote their growth, but also prolong the flowering period and improve the quality of flowers.

The application of this high-efficiency light source system to agricultural production such as greenhouses and greenhouses can, on the one hand, solve the drawbacks of the lack of sunlight leading to the decrease in the taste of greenhouse vegetables such as tomatoes and cucumbers. It will be listed before and after the Spring Festival, so as to achieve the purpose of off-season cultivation.

1. As a supplementary light, the light can be enhanced at any time of the day, which can prolong the effective lighting time.

2. Whether at dusk or at night, it can effectively extend and scientifically control the light required by plants.

3. In the greenhouse or plant laboratory, it can completely replace natural light and promote plant growth.

4. Completely solve the situation of watching the sky and eat in the seedling stage, and arrange the time reasonably according to the delivery date of the seedlings.

The significance of greenhouse lighting

The growth rate of plants depends on the light intensity, that is, the amount of light radiant energy absorbed by the surface of the plant, not on the number of light sources.

The significance of lighting inside the greenhouse is to extend enough light intensity throughout the day. Mainly used for growing vegetables, roses and even chrysanthemum seedlings in late autumn and winter. Greenhouse lighting has a huge impact on the growth period and seedling quality. Usually, for tomatoes, light will start after the plant seedlings grow two cotyledons. Continuous light for 12 days can reduce the seedling preparation period by 6-8 days. But more than 24 hours of light will cause plant growth disorder.

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Heat sealing process and principle of square bottom valve bag making machine

The square bottom valve bag making machine can be used to make valve pockets of various materials such as paper valve pockets, plastic woven heat sealing valve pockets, multi-layer kraft paper bag making machines, etc. The gluing process is used for bonding to present a square shape. The heat sealing process and principle of the square bottom valve bag making machine.

Heat sealing process and principle of square bottom valve bag making machine

HT120-IA Paper Tube Machine

1. Heat sealing knife gap

The gap of the heat-sealing knife refers to the pressure interval from which the predetermined heat-sealing pressure is transmitted to the heat-sealing surface when the upper heat-sealing knife contacts the bottom plate. Usually the gap of the heat sealing knife is set at 1.0 ~ 1.5mm, which is related to the bag making speed, film thickness, transfer function, etc. At the same film thickness and the same heat sealing speed, the heat sealing time of the heat sealing knife is relatively small, and the heat sealing strength of the product will decrease.

2. Heat sealing times

General heat sealing usually requires more than 2 times of heat sealing. After the bottom of the square bottom valve pocket is formed, there are generally at most eight layers. Usually, there are 5 sets of transverse heat sealing equipment for the square bottom valve pocket. Ultrasonic welding is used for heat sealing of zippers. Nice bag. The heat sealing strength is not easy to form in the center of the base material, and it is easy to cause a root break phenomenon if it is heat sealed too many times.

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Summary of basic skills of bag making mechanism bag

The most important function of packaging is to protect the quality of all packaged goods, that is, to ensure that the goods will not be damaged, lost, leaked and spoiled.

This requires that the seal must have a certain strength and sealing performance in the process of bag making, and can withstand the pressure of a certain weight of content to ensure that the product does not crack or leak during the circulation process, so as to achieve the purpose of protecting the product. And bag making is the last production process before delivery to users, and quality control is more important.

Material selection

HT120-IA Paper Tube Machine

Surface material

Most of the non-heat-sealable materials are used, and materials with good heat resistance and small thermal deformation should be considered, such as BOPA, BOPET, BOPP, paper, etc.

Inner material

That is, the heat-sealable material can be heat-sealed at a temperature 30°C lower than the heat-deformation temperature of the surface-layer material. If the temperature is low, the sealing fastness is poor and cannot meet the requirements. In order to improve the sealing fastness, the temperature is raised. Because the thermal deformation temperature difference between the inner and outer layers is too small, the surface material is easily scalded.

For the same heat-sealing material, its heat-sealing strength will increase as the thickness of the heat-sealing material increases. Therefore, the inner layer material of the back sealing bag and the stand-up bag should be more than 30μm thick. If the inner layer material is too thin, it will affect the sealing of the finished bag.

Zipper

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WHAT ARE THE DIFFERENCES BETWEEN CALCIUM HYDROXIDE EQUIPMENT AND TRADITIONAL PRODUCTION PROCESSES?

In recent years, with the continuous development of my country’s calcium hydroxide market, the technical indicators of calcium hydroxide products are also constantly improving. The traditional calcium hydroxide production process and the inability to meet market demand and technical indicators have been gradually replaced by calcium hydroxide equipment. Everyone has a lot of doubts about calcium hydroxide equipment. Many people are curious about the difference between calcium hydroxide equipment and traditional production processes? Next, I will introduce you to it.

THE DIFFERENCE BETWEEN CALCIUM HYDROXIDE EQUIPMENT AND TRADITIONAL PRODUCTION PROCESS

GFEX Case

1. PRODUCTION PROCESS

The calcium hydroxide that can be mechanized and produced on a large scale using calcium hydroxide equipment has a much higher product quality than hand-produced products. At the same time, the equipment also realizes automatic control and online real-time monitoring. The entire production line only needs 2 to 3 employees, which saves human resources.

The traditional production process is mainly manual, and the product quality is not very good. It is mainly used in low-end markets such as sewage treatment, ash calcium, and putty powder.

2. CALCIUM HYDROXIDE PRODUCTION

The production of calcium hydroxide equipment can realize large-scale production of calcium hydroxide. The output of a single machine ranges from 3T/h to 20T/h, and different schemes can be completed according to the requirements of users.

The traditional production process is inefficient, and each person does not exceed 1 ton of finished calcium hydroxide during the day. Such production capacity cannot meet the large demand for calcium hydroxide in various industries such as power plant desulfurization, fine chemical industry, pharmaceutical food, petroleum, and paper making.

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HOW TO ADJUST THE FINENESS OF CALCIUM HYDROXIDE EQUIPMENT?

Users who purchase calcium hydroxide equipment production lines usually consult in detail about what standard the calcium hydroxide produced by calcium hydroxide equipment can meet, and purchase corresponding supporting production lines according to their own goals.

At present, the calcium hydroxide powder produced by domestic calcium hydroxide equipment can reach industrial grade use, the fineness is generally 200-400 mesh, and the content is generally 65%-93%. construction and other industries.

The fineness of calcium hydroxide equipment can reach about 325 mesh, and it can produce 6-20 tons of finished calcium hydroxide per hour. If it is produced in 24 hours, it can produce up to 480 tons of calcium hydroxide powder a day, which can meet the high standard requirements of users.

HOW TO ENSURE THE POWDER FINENESS OF CALCIUM HYDROXIDE EQUIPMENT?

For the performance of calcium hydroxide equipment, powder fineness is undoubtedly a very important measure. Users all hope that the purchased equipment can achieve stable powder fineness and ensure powder quality. From the following two aspects to ensure that users buy Equipment to the desired effect and standard.

1. The matching powder selection device is very important. Its main function is to classify and screen the powder processed by the calcium hydroxide equipment, and select qualified finished products. Therefore, for the calcium hydroxide production line, choose the selection that is suitable for your own production line requirements. The size of the powder machine becomes very important.

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