The vibrating screen is a kind of high-efficient solid material screening equipment, often used in the mining, metallurgy, building materials, the chemical industry, light industry, medicine and other industries of different particle shapes, particle size of the screening and classification of materials. During the operation of the vibrating screen, it is very common for the material to be blanked, with no feed and deviated, and the following are several reasons and solutions for this situation, for your reference.
The reasons and solutions for the material blank or not feeding and deviation of the vibrating screen are as follows:
1. The amplitude is not set properly: The amplitude is too large or too small will affect the material flow and screening effect, and the amplitude will increase the material layer thickness, which is not conducive to the material passing through the sieve; If the amplitude is too small, it can not make the fine particles pass through the screen, affecting the screening effect. In practical applications, the reasonable range of the amplitude is generally 1-5mm.
【Solution】 Combine material characteristics and screening requirements, but also take into account the vibration motor speed and power of the motor, as well as the design structure and size of the vibrating screen and other factors, reasonably set up the amplitude, adjust the amplitude of the vibrating screen to a reasonable range, and constantly adjust and optimized in the actual use process. This can improve the efficiency of the vibrating screen and the screening accuracy but also can extend the service life of the equipment.
2. Improper installation of the vibration motor: It may lead to problems such as unstable work and uneven vibration of the vibrating screen, which need to be checked in time and adjusted, which can improve the stable operation and efficiency of the equipment during the operation of the equipment and reduce the impact of equipment problems. Specific solutions are as follows:
(1). The bracket of the vibration motor is loose: If the installation of the bracket of the vibration motor is not firm, it may lead to uneven transmission of vibration force, which will affect the working effect of the vibrating screen.
【Solution】 Check whether the bracket of the vibration motor is tightened, and if it is loose, it should be adjusted. In the vibration motor installation, it is necessary to ensure that the position of the installation is accurate and that the coordination between the bracket and the vibration motor is tight to avoid imbalance or dislocation. Use accessories such as high-quality vibration motor brackets, bolts, and other accessories to avoid loosening of the bracket due to low-quality accessories. For the loose bracket of the vibration motor, it is necessary to shut it down in time for maintenance, re-tighten the bolt of the bracket, and do a good job of anti-looseness.
(2). Improper adjustment of the vibration motor: If the vibration motor is not adjusted properly, such as if the speed is too high or too low, or the phase setting is incorrect, it will affect the efficiency of the vibrating screen, screening accuracy and material flow.
【Solution】 Combine material characteristics and screening requirements, and reasonably set the speed and phase of the vibration motor, when adjusting the vibration motor, you also need to pay attention to different models of vibration motor there may be differences, that need to be adjusted according to the actual situation.
(3). Vibration motor spring is not suitable for vibration reduction: The cooperation between the vibration motor and the spring of vibration reduction is also very important, if not matched, there may be uneven transmission of vibration force, excessive noise, frequency of vibration instability and other problems, affecting the vibrating screen working effect.
【Solution】 The vibration motor spring should be reasonably matched with the vibration reduction, and the stiffness and quantity of the spring should meet the design requirements so that the contact area between the vibration motor and the vibrating screen is fully guaranteed. Installation of the absorber spring and vibration motor should be strictly in accordance with the equipment instructions or technical specifications to ensure that the installation is correct. In the selection and installation of an absorber spring, it is necessary to consider the vibrating screen weight and size of amplitude, as well as the working environment of the equipment and other factors. Check the state of the absorber spring regularly and replace it in time if there are problems such as aging or deformation.
(4). The water flooded in the vibration motor: If the vibration motor is flooded with water, it may cause damage to the motor and affect the working effect of the vibrating screen.
【Solution】 Check the vibration motor is flooded with water, and carry out timely cleaning and maintenance.
3. Screen blockage or wear: Screen blockage or wear is also a common problem for material blanking or not feeding, the blockage will lead to the reduction of screening accuracy, poor material flow and other problems, and wear may lead to the screen hole becoming larger or deformation, and then affect the screening effect.
【Solution】 Regularly clean the material on the screen to avoid blockage of the screen. In general, it is recommended to clean the screen at least once a day, especially for materials that are prone to clogging and should be cleaned more frequently. Select the appropriate screen material to avoid excessive wear. According to the material characteristics and screening requirements, the selection of screen materials with good hardness and wear resistance can effectively slow down the wear rate of the screen. Check the state of the screen regularly during use, such as finding that the screening hole becomes large or deformed, etc., and should be timely replaced. For materials prone to static electricity, humidification and other methods can be used to avoid blocking caused by materials adhering to the screen.
4. The spring of the sieve plates is loose or fails: If the spring of the sieve plate is loose or fails, it will affect the uniformity of the vibration force, resulting in the problem of material not blanking or deviation, which will affect the screening effect, and may even cause equipment damage.
【Solution】 To check the spring state of the screen plate. If the spring is found to be loose or invalid, it should be replaced in time. Check the fixation of the spring. If the installation of the spring is not secure or the bolt is loose, it needs to be adjusted and tightened. Check the hardness and length of the screen plate spring on a regular basis. If the hardness of the spring is found to be low or the length changes greatly, the spring should be replaced. During use, pay attention to observe the working state of the sieve plate. If the sieve plate is found to shake or shift, it needs to be dealt with in time to avoid more serious consequences.
5. Material adhesion: Some materials are easy to adhere to the screen, affecting the efficiency of screening, and resulting in materials blanking or deviation.
【Solution】 For different types of materials, use appropriate screen materials to avoid the material adhering to the screen. For example, for materials that adhere easily, polyurethane screens with smooth surfaces and easy cleaning can be selected. Through the humidification method, the static electricity of the material is inhibited, the adsorption force of the material to the screen is reduced, and the possibility of the material adhering is reduced. In the process of work, regularly clean the screen plate, screen and screen holes to avoid material agglomeration or accumulation caused by long-term vibration. For severe material adhesion, you can consider increasing the vibration amplitude or adjusting the frequency of vibration, to promote the flow of material on the screen, so that it is easier to pass through the screening hole.
6. Air leakage at the joint: The vibrating screen of air leakage at the joint leads to insufficient pressure, and poor material flow may even cause equipment damage.
【Solution】 Check the vibration motor is flooded with water, and carry out timely cleaning and maintenance.
There are many reasons for the material blanking or not feeding and deviation of the vibrating screen, it needs to be investigated from many aspects and take corresponding measures. At the same time, do a good job of checking the vibrating screen regularly and maintaining the maintenance to keep it in good working condition, to ensure the stability and efficiency of the vibrating screen.
Vanguard Machinery is a mining machinery manufacturer that specializes in crushing, sand making, screening and ancillary equipment production. With a skilled R&D team and a group of experienced production personnel, the production vibrating screen is compact, reliable in safety, environmental protection energy-saving, reasonable in design, easy to maintain with long service life, high-efficiency work, and can freely adjust the vibration amplitude and the frequency according to different material characteristics and screen requirements. Of course, in addition to the vibrating screen, we also produce other equipment, such as jaw crusher, impact crusher, sand making machine, mobile crushing plant, etc. Vanguard Machinery has many years of production experience and technical advantages, which can provide customers with one-stop of solutions.
