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There are many classifications of slewing bearings, each type has different characteristics, and the scenarios used are also different. You may not be very clear about the selection type. Generally, the selection type should be considered: slewing accuracy, bearing capacity, working temperature, In terms of running speed, etc., let’s take a look at the specific method with the slewing bearing manufacturer~

Classification of slewing bearings

1. Three-row combined roller slewing bearing

The three-row roller slewing bearing has the upper and lower and radial raceways of the three races separated, so that the load of each row of rollers can be accurately determined. It can bear various loads at the same time, has a firm structure, and has large shaft and radial dimensions. It is suitable for heavy machinery requiring large diameters.

2. Double row angular contact ball slewing bearing

The double-row ball slewing bearing has three races, and the steel balls and spacers can be directly discharged into the upper and lower raceways. According to the stress conditions, two rows of steel balls with different diameters are arranged. The axial and radial dimensions of the double-row ball slewing bearing are relatively large, and the structure is firm, especially suitable for machinery that requires a medium or larger diameter.

3. Single row cross roller slewing bearing

The single-row cross-roller slewing bearing is composed of two races, with compact structure, high manufacturing precision, light weight, small assembly clearance, and can bear axial force, large radial force and tipping moment at the same time.

4. Single row four-point contact ball slewing bearing

The single-row four-point contact ball bearing slewing bearing is composed of two races, with compact structure, light weight, four-point contact between the steel ball and the arc raceway, and can bear axial force, radial force and tipping moment at the same time.

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Details can be accessed by clicking here:https://www.ldb-bearing.com/ldb-bearing-knowledge/slewing-bearing-classification.html

As a large-scale crushing equipment, the high-pressure roller mill is usually installed on site after the components are assembled in the workshop. The roller, as the main crushing component of the high-pressure roller mill, has stricter requirements in terms of assembly and installation. , The following briquetting machine manufacturers have sorted out the installation steps of the high-pressure roller mill rollers and roller sleeves for your reference.

Assembly of high pressure roller mill rollers

The assembly and installation of the high-pressure roller mill rollers are mainly divided into two stages. The first is to install the roller sleeve on the roller core in the workshop. Usually, the burner is hot-loaded. After the roller sleeve is hot-installed, it is installed after natural cooling. Bearings; the second stage is the overall transport of the rollers and the installation of the rollers on the equipment.

1. Roller sleeve installation steps

(1) Before assembling, measure the inner diameter of the roller sleeve and the outer diameter of the roller core. The inner diameter of the roller sleeve is checked with an inner diameter micrometer. The graduation value is 0.002mm. The outer diameter micrometer suitable for this roller core is 1000mm~ 1500mm, the division value is 0.01mm, the division value is too large, the equipment comes with a special tool for measuring the roll core, the measurement is divided into three parts: upper, middle and lower, and each part is divided into three points A, B, and C. The average value of the measured data is taken. The inner diameter of the roll sleeve is smaller than the outer diameter of the roll core by 0.2mm~0.5mm.

(2) Use kerosene to clean the anti-rust oil on the roller core, there should be no burrs on the roller core, then erect the roller core on the erected bracket, adjust the verticality of the roller core with a level ruler, and wipe a small amount of lubricating oil.

(3) Assemble the roller sleeve after the adjustment of the roller core. Before hoisting, wipe the heating interior with acetone, hoist it away from 10cm, adjust the levelness of the roller sleeve with a spirit level, and quickly set it on the roller core after the adjustment is qualified.

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Details can be accessed by clicking here:https://www.zymining.com/blog/high-pressure-roller-mill-roll-assembly.html

The clutch disc is a composite material with friction as its main function and structural performance requirements. Tractor friction materials are mainly used to manufacture brake friction discs and clutch discs. These friction materials mainly use asbestos-based friction materials. With the increasing requirements for environmental protection and safety, semi-metal friction materials, composite fiber friction materials, and ceramic fiber friction materials have gradually appeared.

Since friction materials are mainly used in the manufacture of brake train and drive train parts on tractors, a sufficiently high and stable friction coefficient and good wear resistance are required. So how do we judge the performance of the clutch friction disc? In response to this problem, the tractor clutch manufacturer gave us a detailed explanation.

1. Appropriate friction coefficient

The friction coefficient is the most basic parameter of the friction material, which determines the basic braking torque of the brake disc. The national standard strictly requires manufacturers to indicate the coefficient of friction on the packaging. The friction coefficient must be appropriate. Too high will cause wheel lock, direction loss and burning during braking, while too low will result in too long braking distance.

2. Reliable security

Brake discs will generate instantaneous high temperature when braking, especially at high speed or emergency braking. At high temperature, the friction coefficient of the friction disc will decrease, which is called thermal recession. The level of thermal decay determines the safety in high temperature conditions and emergency braking.

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Details can be accessed by clicking here:https://www.syclutch.com/news/clutch-friction-disc-performance.html

The valve bag packaging machine is an automatic packaging machine designed for various fine powder or ultrafine powder materials with low bulk density, strong air affinity, and excellent or poor self-flow.

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;

3. At the same time, the pull rod of the electromagnet moves up, and the material bag falls, so as to realize quantitative and rapid packaging of loose materials;

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Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/the-working-principle-of-valve-bag-packaging-machine.html

Row of desks and chairs are more common in university campuses and some multimedia classrooms. These desks and chairs are generally used for students to take large classes, which is suitable for classrooms with a large number of students. Although students who use such desks and chairs Most of them are college students, and they are already adults, but they still need to pay attention to details when choosing desks and chairs. To ensure the safety of use, what should be paid attention to when choosing a row of desks and chairs?

1. To have retractable function

The use of rows of desks and chairs is generally to make good use of the space of the lecture hall, so choose rows of desks and chairs. However, when choosing, we should choose some rows of desks and chairs with retractable functions, which can also maintain the neatness and aesthetics of the amphitheatre.

In addition, it will be more convenient for students to use, so when choosing a row of desks and chairs, the functional choice is very important to ensure that it can bring students a comfortable experience, create a high-quality learning environment, and improve students’ learning efficiency.

2. Ensure security

After all, the use of rows of desks and chairs is for students, and the safety of students in schools has always been a concern of the public. Therefore, when choosing rows of desks and chairs, we need to pay attention to their safety.

The safety of row desks and chairs is mainly reflected in the safety of their materials and structure. Therefore, we need to pay attention to these two aspects when choosing row desks and chairs. They must be safe and environmentally friendly. Firm and stable to avoid endangering the health of students.

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Details can be accessed by clicking here:https://www.aoyangschoolfurniture.com/aoyang-news/precautions-for-selection-of-row-desks-and-chairs.html