How does the circular vibrating screen work?

A circular vibrating screen operates using a motor to drive an eccentric shaft, which creates a circular motion of the screen. This motion causes the materials on the screen to move in a circular path, facilitating the separation of particles based on size. Here is a step-by-step explanation of how a circular vibrating screen works.

Working principle of circular vibrating screen

circular vibrating screen

Motor and Eccentric Shaft: The operation begins with an electric motor that drives an eccentric shaft. This shaft is not centered, meaning its axis of rotation is offset. As the motor rotates the shaft, the eccentric design causes the shaft to move in a circular motion.

Screen Frame: Attached to the eccentric shaft is a screen frame that holds one or multiple screening surfaces or meshes. As the eccentric shaft rotates, it imparts a circular motion to the screen frame.

Vibration: The circular motion generated by the eccentric shaft creates vibrations in the screen frame. These vibrations are transmitted through the screen surface.

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What is a welding turntable ?

Welding turntable is a special equipment used for welding operations. It can rotate the workpiece at various angles and speeds to facilitate the welder’s welding operations. This equipment is widely used in industries that require precise and efficient welding, such as machine manufacturing, automobile manufacturing, aerospace, petrochemicals, and shipbuilding.

Main components of welding turntable

Base: The base part of the welded turntable that provides stability and support.

Rotary table: a rotatable work table installed on the base and used to fix the workpiece.

Drive system: usually composed of an electric motor and a reducer, responsible for providing rotational power and controlling the speed.

Control system: including electrical control box and operation panel, used to control the rotation speed, angle and direction of the turntable.

Clamp: used to fix the workpiece to keep it stable during the welding process.

Welding turntable

How the welding turntable works

The welding turntable rotates the rotary table through the drive system, and the workpiece is fixed on the rotary table. During the welding operation, the welder or automatic welding equipment can perform welding in a fixed position, and the rotating movement of the turntable ensures that the weld seam is maintained at the optimal welding position and angle.

Clamping the workpiece: The workpiece is fixed on the rotary table by the fixture to ensure that it does not move during the rotation.

Set parameters: Set parameters such as rotation speed, rotation direction and rotation angle through the control system.

Start the equipment: start the welding turntable, and the drive system starts to work, making the turntable and workpiece rotate.

Welding operation: Welders or automatic welding equipment perform welding during the rotation of the workpiece to ensure welding quality and efficiency.

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What are the types of crushers?

Crushers are machines used to reduce the size of rocks, gravel, or other materials in aggregate processing, construction, and mining. Here are the main types of crushers, along with a brief description of each:

Crushers types

Crushers

1. Jaw Crushers

Jaw crushers use a pair of vertical jaws, one stationary and the other moving, to crush materials. The material is fed into the top of the jaws and is compressed as the movable jaw moves towards the stationary jaw, crushing it into smaller pieces. Jaw crushers are commonly used for primary crushing.

2. Gyratory Crushers

Gyratory crushers consist of a concave surface and a conical head; both surfaces are typically lined with manganese steel. The inner cone is slightly eccentric, which allows the gap between it and the concave to change, crushing the material. They are used for primary or secondary crushing of large volumes of hard materials.

3. Cone Crushers

Cone crushers are similar to gyratory crushers in that they use a mantle that gyrates within a concave bowl. Unlike gyratory crushers, cone crushers are more often used in secondary, tertiary, and quaternary crushing stages. The material is crushed by compression between the mantle and the bowl liner.

Crushers

4. Impact Crushers

Impact crushers utilize the impact principle. They come in two main types:

Horizontal Shaft Impact (HSI) Crushers: These use hammers or blow bars attached to a horizontal rotor to crush the material as it strikes a stationary anvil or breaker plates.

Vertical Shaft Impact (VSI) Crushers: These use a high-speed rotor to project material against a wear-resistant anvil or rock shelf, breaking the material along its natural fissures.

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More detailed information about crusher types can be accessed by clicking here: https://www.zymining.com/en/a/news/crushers-types.html

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Detailed explanation of the installation method of crossed cylindrical roller bearings

Installing crossed cylindrical roller bearings requires precision and careful handling to ensure optimal performance and longevity. Here’s a step-by-step guide on how to properly install these bearings:

The installation method of crossed cylindrical roller bearings

crossed cylindrical roller bearings

Preparation

Cleanliness: Ensure that the bearing, housing, and all related components are clean. Remove any dirt, dust, or debris that could affect the bearing’s performance.

Inspect Components: Check the bearing, housing, and shaft for any signs of damage or wear. Replace any damaged parts before proceeding.

Lubrication: Lubricate the bearing and related components with the appropriate lubricant recommended by the manufacturer.

Installation Process

Aligning the Bearing and Shaft:

Carefully align the bearing with the shaft. Ensure that the bearing’s inner ring fits onto the shaft smoothly.

Use a plastic or rubber mallet to gently tap the bearing into place if necessary. Avoid using excessive force to prevent damage.

Inserting the Bearing:

Place the bearing onto the shaft and ensure that it is seated correctly.

For larger bearings, use a bearing heater to expand the inner ring slightly, allowing for easier installation.

Mounting the Outer Ring:

Align the outer ring with the housing or bearing seat.

Gently tap the outer ring into place using a soft mallet or a press, ensuring even pressure to avoid misalignment.

Securing the Bearing:

Once the bearing is in place, secure it with the appropriate locking mechanism, such as a lock nut, retaining ring, or end cap.

Tighten any screws or bolts to the manufacturer’s recommended torque specifications to prevent over-tightening or under-tightening.

Check Alignment:

Rotate the bearing assembly by hand to check for smooth operation and proper alignment.

Ensure there is no excessive play or binding in the bearing.

Final Lubrication:

Apply additional lubricant if necessary, ensuring that the bearing is adequately lubricated for operation.

Follow the manufacturer’s guidelines for the type and amount of lubricant to use.

Test Run:

Once installed, run the bearing at low speed and check for any abnormal noise, vibration, or heat generation.

Gradually increase the speed to the normal operating level while continuing to monitor the bearing’s performance.

crossed cylindrical roller bearings

Post-Installation

Regular Inspection: Periodically check the bearing for signs of wear, lubrication levels, and overall performance.

Maintenance: Follow the maintenance schedule recommended by the bearing manufacturer to ensure long-term reliability.

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For more detailed information about the installation method of crossed cylindrical roller bearings, please click here:https://www.boyingbearing.com/en/a/news/crossed-cylindrical-roller-bearing-installation-method.html

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Introduction to mobile aisle shelving system

Mobile aisle shelving systems are an efficient storage solution that are widely used in libraries, archives, warehouses, museums and other fields. This system maximizes space utilization and significantly increases storage density by introducing movable rails and shelving units onto traditional shelving. This article will detail how mobile aisle shelving systems work, their structural components, installation methods, and their benefits.

Working principle

The core concept of a mobile aisle shelving system is to mount multiple shelving units on movable tracks. By manual or motorized means, users can move these shelving units, creating a temporary passage to access desired storage items. In this way, the system only opens channels when needed, thereby converting the space originally used for fixed channels into storage space and improving storage efficiency.

Mobile Aisle Shelving Systems

Structural components

The mobile channel shelving system mainly consists of the following parts:

Track System: Tracks are the foundation of a mobile aisle shelving system and are typically made from high-strength steel. Tracks are installed on the floor to ensure smooth movement of the shelving unit. The design of the track needs to consider the flatness and load-bearing capacity of the ground.

Shelving Unit: A shelving unit is the actual structure for storing items and consists of multiple layers of adjustable shelves and brackets. Shelving unit sizes and materials vary depending on storage needs and environmental conditions.

Drive System:

Manual drive: Uses handles or wheels to push the shelving unit forward. Manual systems are generally suitable for smaller-scale applications.

Electric Drive: Equipped with an electric motor to control the movement of the shelving unit via buttons or touch screen. Motorized systems are suitable for storage environments that require frequent access and larger volumes.

Safety system: including anti-tilting devices, infrared sensors and emergency stop buttons to ensure the safety of people and items during movement.

Installation method

The installation of a mobile aisle shelving system requires professional skills and precise measurements. The main steps are as follows:

Ground preparation: Make sure the ground is flat and has sufficient load-bearing capacity. Perform ground reinforcement or adjustments if necessary.

Install the track: According to the design drawings, accurately position and fix the track. Make sure the tracks are parallel and level to allow for smooth movement of the shelving unit.

Assemble Shelving Units: Assemble shelving units as needed, adjusting shelf heights to accommodate different sized storage items.

Install drive systems and safety devices: Install manual or electric drive systems, set safety devices, and perform testing and commissioning.

System debugging: After installation is complete, conduct a comprehensive test of the entire system to ensure that the shelving units move smoothly and safety devices are working properly.

Mobile Aisle Shelving Systems

Advantage

Mobile aisle shelving systems offer the following significant benefits:

High space utilization: By reducing the number of fixed channels, the storage density is greatly increased and the space utilization efficiency is improved.

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For more detailed information about the introduction of mobile aisle shelving system, please click here: https://www.etegreen.com/en/a/news/introduction-to-mobile-aisle-shelving-system.html

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What is the correct installation method for machine tool spindle bearings?

The correct installation method for machine tool spindle bearings is critical to ensure precision, performance, and longevity of the machine. Here’s a detailed guide on how to install these bearings correctly.

Preparation

Work Area Cleanliness: Ensure the work area is clean and free from contaminants such as dust, dirt, and metal shavings.

Inspection: Check all components, including the bearings, spindle, and housing, for any signs of damage or wear. Replace any defective parts.

Tools and Equipment: Gather all necessary tools and equipment, such as bearing heaters, clean gloves, soft mallets, and appropriate measuring instruments.

Lubrication

Pre-lubrication: Depending on the type of bearing and manufacturer’s recommendations, pre-lubricate the bearings with the appropriate lubricant. This could be grease or oil.

Heating

Bearing Heating: Use a bearing heater to uniformly heat the bearing to a temperature recommended by the manufacturer, typically between 80°C and 100°C (176°F to 212°F). This allows the bearing to expand slightly for easier installation onto the spindle.

Spindle Bearings

Installation Steps

Align the Bearing: Align the bearing with the spindle to ensure it slides on straight without tilting or skewing.

Mount the Bearing:

Press Fit: For bearings that require a press fit, use a hydraulic press or a suitable fixture to press the bearing onto the spindle. Apply pressure evenly and ensure the bearing is pressed in squarely to avoid misalignment.

Slip Fit: For bearings that are heated and then slipped onto the spindle, ensure that the bearing is placed quickly and precisely while it is still expanded from heating.

Cooling and Seating: Allow the bearing to cool and contract onto the spindle, ensuring a tight fit. Verify that the bearing is seated properly against any shoulders or stops on the spindle.

Securing the Bearing

Retaining Mechanisms: Use retaining nuts, lock washers, or other retaining mechanisms as specified by the manufacturer to secure the bearing in place. Torque the retaining nuts to the specified value using a torque wrench.

Axial Preload: Set the axial preload on the bearings according to the manufacturer’s specifications. This may involve adjusting spacers or using preloading tools.

Installation into Housing

Housing Alignment: Ensure the spindle and bearing assembly is aligned with the housing. Misalignment can cause premature bearing failure.

Inserting Assembly: Carefully insert the spindle and bearing assembly into the housing, ensuring that it is aligned and does not damage the bearing or housing.

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For more detailed information about the installation method of machine tool spindle bearings, please click here: https://www.lkwebearing.com/news-center/machine-tool-spindle-bearing-installation.html

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What is the reason for the loud noise of the linear vibrating screen?

Linear vibrating screen is a kind of screening equipment commonly used in industrial production. It drives the screen body to perform linear motion through a vibration motor to achieve grading and screening of materials. However, in actual use, it is a common problem that the vibrating screen produces loud noise, which not only affects the working environment, but may also cause damage to the operator’s hearing. This article will discuss the reasons for the high noise of linear vibrating screens and propose corresponding solutions.

The loud noise generated by a linear vibrating screen can be attributed to several factors. Here are the primary reasons and potential solutions to mitigate the noise:

High Frequency Dehydration Vibrating Screen

1. Loose Parts and Components

Loose bolts, nuts, or other fastening components can cause vibrations and noise.

Solution: Regularly inspect and tighten all fasteners and components.

2. Worn or Damaged Bearings

Bearings in poor condition can generate significant noise due to increased friction and vibration.

Solution: Inspect bearings regularly, lubricate them appropriately, and replace any that are worn or damaged.

3. Imbalanced Vibrating Motor

An imbalanced motor can cause uneven vibrations, leading to loud noise.

Solution: Ensure that the motor is properly balanced and aligned. Replace or repair the motor if necessary.

4. Improper Installation

Incorrect installation of the screen or its components can lead to misalignment and increased noise.

Solution: Verify that all components are installed correctly and aligned as per the manufacturer’s specifications.

Arc Vibrating Screen

5. Excessive Feed Rate

Feeding the screen with too much material can overload it, causing excessive noise.

Solution: Adjust the feed rate to an optimal level that the screen can handle without overloading.

6. Screen Media Condition

Worn or improperly tensioned screen media can flap and create noise.

Solution: Inspect the screen media regularly, replace worn sections, and ensure proper tensioning.

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For more detailed information about the reasons for the high noise of linear vibrating screens, please click here: https://www.hsd-industry.com/news/reasons-for-the-high-noise-of-linear-vibrating-screens/

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Detailed explanation of vibrating screen exciter maintenance procedures and maintenance requirements

In the field of industrial equipment maintenance, as one of the key equipment, the vibrating screen exciter must follow a series of steps and standards during its maintenance process to ensure its reliability and durability. The maintenance process of the vibrating screen exciter includes a series of strict operations, from taking photos and archiving the original condition of the machine after entering the factory, to the comprehensive process of painting and shipping. Each step significantly affects the quality of the maintenance results. In order to ensure the quality of maintenance, various requirements in vibrating screen exciter maintenance are also particularly critical. From bearings to boxes, to gears and other parts, relevant standards and specifications need to be strictly adhered to to ensure that the vibrating screen exciter is maintained during maintenance. Finally, the expected working performance can be achieved.

Vibrating screen exciter maintenance

DF series vibrating screen exciter

1. Vibrator maintenance process

Take photos and archive the original condition of the machine after entering the factory → Shot blasting → Spray primer → Disassemble the vibrator → Take photos and archive the parts → Clean the parts → Inspect, test and archive → Issue a test report → The salesperson will confirm the damage with the user Form a damage determination confirmation form → formulate a maintenance plan → receive parts → inspect, record and archive → ultrasonic cleaning → assembly → test and record and file → spray paint → ship

2. Vibrator maintenance requirements

  • Bearings

It must be replaced during maintenance, and high-quality SKF special bearings for vibrating screens must be selected to ensure that they can withstand high-intensity vibration working environments and maintain long-term stable operation. Careful installation and adjustment work is also essential to ensure the correct installation position and normal working condition of the bearings.

  • Sealing

The replacement of seals is an important guarantee for the normal operation of the exciter. When replacing, it is necessary to select high-quality seals that match the original parts to ensure that they can effectively prevent the leakage of lubricating oil or other substances, thereby protecting the internal parts of the exciter from damage.

  • Box

Boxes that are cracked, deformed, thread damaged or worn must be replaced; when the box hole and the bearing outer ring installation position are worn and the bearing does not meet the assembly requirements, they must be replaced. The new box should be replaced with high-strength ductile iron QT400-12 material, which has no defects such as slag inclusions, pores, cracks, etc. and has been inspected by ultrasonic to ensure its durability and stability. During the processing of the cabinet, the precision machining process of the CNC machining center should be strictly implemented to ensure the accuracy and stability of the cabinet.

DE Series Vibrating Screen Exciter

  • Axis

During the maintenance process, shaft replacement is a key link to ensure the normal operation of the vibrator. If there are obvious concave and convex marks on the surface of the shaft, the ovality of the bearing position and gear position is ≥0.01mm, and the assembly dimensions of the shaft and the inner ring of the bearing do not meet the requirements, they must be replaced. The replacement shaft is made of alloy structural steel 42CrMo processed by CNC machine tools, which can ensure good strength and wear resistance. During the installation process, ensure that the assembly dimensions of the shaft and the inner ring of the bearing meet the requirements to ensure the operation of the vibrator.

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For more detailed information about vibrating screen exciter maintenance procedures and maintenance requirements, please click here: https://www.hsd-industry.com/news/vibrating-screen-exciter-maintenance/

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What are the operating steps and precautions for vibrating screens?

In industries such as mining and coal preparation, materials need to be screened and classified before use. The vibrating screen uses mechanized vibration to classify materials according to different sizes. It has a large processing capacity and high screening efficiency, which is better than traditional manual sorting. The selection efficiency will be improved many times, and it can be said to be a “good helper” in the screening work. However, if the screen machine is used improperly, it will cause mechanical failure, short service life and other problems. In order to avoid these problems, the following Haiside vibrating screen manufacturer will introduce the operating steps and precautions of the vibrating screen.

Operating a vibrating screen involves several steps to ensure smooth and efficient operation while maintaining safety standards. Here are the typical operating steps and precautions for vibrating screens:

Double banana sieve

Pre-Operation Inspection:

Perform a visual inspection of the vibrating screen and its components to check for any signs of damage, wear, or loose connections.

Ensure that all safety guards, covers, and access doors are in place and securely fastened.

Verify that the screen deck is clean and free of debris or buildup that could affect performance.

Start-Up Sequence:

Turn on the power supply to the vibrating screen and any associated equipment, such as feeders or conveyors.

Allow the vibrating screen to reach its operating speed gradually to avoid excessive stress on the motor and drive system.

Monitor the screen’s operation for any abnormal vibrations, noises, or other signs of malfunction.

Adjustment of Settings:

Adjust the amplitude, frequency, and inclination of the vibrating screen to optimize performance for the specific application and material being processed.

Fine-tune the settings as needed to achieve the desired separation efficiency, throughput, and product quality.

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For more detailed information about the operating steps and precautions of the vibrating screen, please click to visit：https://www.hsd-industry.com/news/vibrating-screen-operation-steps-and-precautions/

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Cylindrical roller bearing size summary

Cylindrical roller bearings are designed to handle heavy radial loads and operate at high speeds. They come in various sizes and configurations to suit different applications. Here’s a summary of the typical sizes and dimensions for cylindrical roller bearings:

Basic Designations

Spindle Bearings

Cylindrical roller bearings are typically categorized by their design, denoted by specific series designations. Common series include:

N Series: Single row, inner ring has two flanges, outer ring has no flanges.

NU Series: Single row, outer ring has two flanges, inner ring has no flanges.

NJ Series: Single row, outer ring has two flanges, inner ring has one flange.

NUP Series: Single row, outer ring has two flanges, inner ring has one flange and a loose flange ring.

NF Series: Single row, outer ring has one flange, inner ring has two flanges.

NN Series: Double row, used for applications requiring high radial load capacity.

NNU Series: Double row, used for high radial load applications with greater rigidity.

Common Sizes and Dimensions

Cylindrical roller bearings come in a wide range of sizes. Here is a summary of typical dimensions for some of the common series:

NU Series

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For more detailed information about cylindrical roller bearing models, please click here: https://www.lkwebearing.com/news-center/cylindrical-roller-bearing-size.html

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