Vibrating screen belongs to mechanical equipment, mechanical equipment is generally composed of many accessories, due to the joint collaboration of various accessories to successfully complete the screening of materials, so the accessories are an important part of the vibrating screen equipment. When we buy vibrating screen, in addition to the whole machine, the accessories should also have a certain understanding, because the quality of the accessories also determines the quality of the whole vibrating screen, so what are the accessories of the vibrating screen? And how to choose the accessories? Here to give you an introduction.
一.What are the accessories of vibrating screen
1.Vibration motor
As the power source of the vibrating screen, the higher the power of the motor, the higher the output and screening accuracy of the equipment. But different models of vibrating screen configured vibration motor power is also different, so it should be reasonably selected. On the other hand, the vibration motor can be divided into ordinary and explosion-proof two kinds, such as the production environment or materials can not have open flame or overheating phenomenon, please choose explosion-proof vibration motor.
2.Vibration damping spring
Vibration damping spring can not only play a role in reducing the resonance of the equipment also plays a role in connecting the base and sieve frame, vibration damping spring can be divided into steel springs, composite springs, rubber springs, different types of equipment used in the vibration damping springs are not the same, so please choose a reasonable choice.
3.Supporting device
The supporting device of vibrating screen has two types: hanging type and seat type. Seat-type installation is relatively simple, and the installation height is low, generally should be preferred. The supporting device of vibrating screen is mainly composed of elastic elements, and the commonly used ones are coil spring, plate spring and rubber spring. It is recommended that the rubber spring is durable and suitable for any working conditions.
4.Transmission device
Vibrating screen usually adopts triangle belt transmission device, the structure of vibrating screen is simple, you can choose any number of vibrator’s rotation, but the belt is easy to slip when running, which may lead to clogging of the screen holes. Vibrating screen also has a coupling direct drive. The coupling can maintain the stable rotation of the vibrator and has a long service life, but it is difficult to adjust the rotation of the vibrator.
5.Bearing
Bearing is an important part of the link vibration motor and screen frame, is to achieve the vibration of the screen frame, bearing selection can be divided into domestic bearings and imported bearings, the price of imported bearings will be higher than the domestic, but whether the quality or noise is better than the domestic bearings. So please choose according to the actual production requirements.
6.Sealing rubber strip
Nowadays, the vibrating screen manufacturers generally use silicone sealing tape, please choose the corresponding sealing tape according to the diameter of the screen frame.
7.Screen mesh
Direct contact with the material parts of the screen quality determines the yield and screening accuracy, screen can be divided into metal woven mesh and perforated plate way, when screening small particles, powder, slurry materials can choose metal woven screen, such as material diameter can be used for large perforated plate screen.
8.Cleaning device
When the vibrating screen production process due to the characteristics of the material will shape problems will be embedded in the mesh mesh blocking problems, which is the need to use the mesh clearing device to clean up. Mesh clearing device: bouncing ball mesh clearing device and ultrasonic mesh clearing device. Bouncing ball mesh device is more commonly used, the material is made of silica gel, in the lower part of the screen mesh with a ball plate equipment to start the bouncing ball to receive the vibration of the equipment vibration strikes the screen surface so as to achieve the effect of clearing the mesh, the device can clean up 200 mesh materials below the blocked mesh problem. Ultrasonic screen cleaning device is a new type of screen cleaning equipment. It is through the high-frequency low-amplitude ultrasonic wave to make the screen surface materials floating to achieve the effect of clearing the mesh. The ultrasonic mesh clearing device can clean up the clogging, sticky mesh, adsorption, drama and other problems of materials below 500 mesh.
二.The selection method of vibrating screen accessories
1.According to the size of the screen machine to choose the vibration motor
The vibrating motor is the core component of the vibrating screen machine, which is the exciter. The size of the excitation force is determined based on the size of the vibrating screen and the characteristics of the material and processing capacity. The weight and processing capacity of the screening machinery are different, so the size of the vibrating motor is also different. If the excitation force is too large, the vibrating screen machine will be cracked because of the excessive excitation force. On the contrary, if the excitation force is too small, it will not achieve the processing effect, and the phenomenon of material accumulation and blockage may also occur.
2.According to the stiffness of the vibration damping spring
The spring is both the main vibration spring and the vibration isolation spring, and its good or bad performance directly affects the screening effect of the vibrating screen. Therefore, the spring selection of the vibrating screen needs to be careful. When the vibrating screen selects the spring stiffness, it is not only necessary to consider that the dynamic load transmitted to the foundation by the bullet shot can not make the building produce also vibration, but also to consider that the spring should have enough supporting capacity.
3.According to the bearing quality selection bearing
Bearing is also the support point of vibration motor or exciter, it is one of the key components in the vibrating screen equipment, its main function is to support the mechanical rotating body, reduce the friction coefficient in the process of vibrating screen machine operation, rotary accuracy. Therefore, the following points should be noted when selecting bearings:
(1) Check whether there are cracks, impurities, rust and corrosion inside and outside the bearing;
(2) Whether there are no noises when rotating and whether there are turbid oil stains on the surface;
(3) Check the clearance of the bearings, whether the size is within the tolerance;
4.According to the material selection screen
Sieve screen has a great impact on the screening efficiency of various materials, a variety of different materials in the sieve plate, sieve net vibration or jumping frequency can increase the number of materials screened out. According to the shape of the material can be designed with different hole shape. If you want to screen the material contains less than the screen hole of the fines as far as possible, you should use a smaller screen hole; on the contrary, if you require the sieve material as far as possible to contain particles larger than the specified size, the screen hole should not be too large. To specify the particle size as the limit of sieve width.
5.According to the material characteristics of the choice of sealing tape
Sealing tape commonly used materials are rubber sealing ring, silicone sealing ring and polyurethane sealing ring three. No special requirements standard machine are equipped with rubber seals; silicone and polyurethane seals are mainly used for materials with special characteristics, such as high temperature, oily, corrosive materials.
6.According to the material wear and tear situation to choose the clearing device
The material of rubber ball of vibrating screen cleaning device has silicone ball and rubber ball. These two kinds of elastic balls have different tolerance to the environment, and in addition the life span is not the same. In the case of large material wear, you can use silicone ball, in the case of material wear degree is small, we can use rubber ball. In the case of low temperature in winter, we can use silicone ball, which will not reduce the elasticity because of the temperature change.
How to choose vibrating screen length and width?
The length of the vibrating screen sieve surface directly affects the screening efficiency of the sieve machine, because the length of the sieve surface affects the length of the sieve material in the sieve surface stay time. Sieving test shows that the screening time is slightly increased, there are many smaller than the sieve particles, large through the sieve holes and through the sieve, so the screening efficiency increases very quickly. But with the growth of sieving time, the screen surface of the easy to sieve particles less and less, leaving most of the difficult to sieve particles, that is, the particle size of the material is close to the size of the sieve size of these particles. These difficult to sieve particles through the sieve, it takes a long time, the screening efficiency increases more and more slowly. Therefore, the length of the screen surface is only within a certain range, to improve the screening efficiency plays a role, can not be excessive length of the screen surface length, or make the sieve machine structure is bulky and heavy, can not achieve the desired results. Similarly, the width of the vibrating screen is not only affected by the processing capacity of the screening machine, but also affected by the structural strength of the screening machine. The larger the width, the larger the specifications of the vibrating screen is bound to increase, the more problems need to be solved on the structural strength of the screening machine and the more difficult, so the width of the screen surface can not be arbitrarily increased.
Selection of vibrating screen length and width
1.The choice of vibrating screen length
The length of the vibrating screen should be selected appropriately, because the screening efficiency of the linear vibrating screen is directly related to the length of the linear vibrating screen, and the length is too long, the materials that have been screened can not be quickly detached from the screen surface and affect the play of the linear vibrating screen utility. Length is too short, the material stays on the screen surface for too short a time without being fully screened. Through the use of longer screen surface to increase screening time to improve screening efficiency is also unreasonable, so the screen length must be selected appropriately.
2.The choice of vibrating screen width
At present, the width of the vibrating screen is up to 3.6m, the width of the screen surface of the lightweight linear vibrating screen can not exceed 1.5m, if the screen surface is too wide, it is difficult to ensure that the material on the screen surface is uniform. In order to ensure the capacity of linear vibrating screen screening equipment, linear vibrating screen material on the screen surface needs to have a certain thickness, when the thickness of the screen surface material on the screen surface to reach a certain amount, the size of the amount of its through the screen surface mainly depends on the width of the linear vibrating screen. Therefore, the larger the production capacity the wider the screen surface needs to be, but the width of the linear vibrating screen should also have certain restrictions.
The above is the answer to the vibrating screen accessories and how to choose, a high-quality vibrating screening equipment needs to have good accessories to assist the work, so as to make the equipment performance to achieve the ideal state.
