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    Home > Active Ingredient News > Drugs Articles > Analysis and solution of problems from vibration motor fault to screen frame deformation and fracture

    Analysis and solution of problems from vibration motor fault to screen frame deformation and fracture

    • Last Update: 2019-04-09
    • Source: Internet
    • Author: User
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    Yesterday, we introduced "top 3 and cause analysis of frequent failures in the application industry of stainless steel shale shaker in 2017" From the high frequency of failures, we analyzed and shared the common problems of stainless steel shale shaker that most people are concerned about Today, we analyze the causes of the problems with high difficulty and great influence in troubleshooting stainless steel shale shaker Sharing of law I cause analysis and treatment method of vibration motor failure of stainless steel shale shaker The vibration motor is the vibration source of stainless steel vibrating screen, and the amplitude can be adjusted by the weight When the vibrating motor works, the centrifugal force generated by the eccentric mass selection is used as the excitation force When the double shaft vibrating motor rotates synchronously, the screen box will vibrate in a reciprocating straight line, and the material will be screened through the gap of the drying surface to complete the screening work of the product 2 Generally, there are the following conditions for the failure of vibration motor: 1 Starting under heavy load causes sudden shutdown due to production or other equipment failure, so that the screen box is full of mineral materials If the exciter starts again under heavy load, it is very easy to cause damage to the universal coupling of vibration motor and other parts Solution: the stainless steel vibrating screen should not be restarted under heavy load 2 If the vibration damping system is damaged, such as the failure of the vibration damping spring or too much material under the screen, the vibration damping system of the stainless steel shale shaker will not be coordinated, resulting in the damage of the vibration motor Solution: the vibration damping spring shall be checked regularly, and the failed and deformed spring shall be replaced in time When replacing, all the vibration damping springs shall be replaced at the same time as possible, and the stiffness of each group of springs before and after replacement shall be consistent 3 Installation quality problems during maintenance In the process of maintenance and installation, if the vibration exciter gap is not properly adjusted, it will cause errors in the axial and radial joints between the vibration motor and the motor, universal coupling and the relative position of the eccentric block of the vibration exciter, resulting in excessive vibration of the vibration motor and high temperature, which will seriously affect the normal operation of the stainless steel vibrating screen Solution: when installing the two motors, try to select the same type of motor with the same damping and the same shutdown time to ensure the synchronous operation of the two motors; before installing the vibration exciter, it must ensure that the running direction of the two motors is opposite; The motor and exciter must be in the same vertical plane, etc., especially when the exciter is overhauled, the quality of the eccentric wheel of a pair of exciters used at the same time shall be consistent IV during the maintenance and disassembly of the vibration motor, the following points shall be paid attention to: 1 The disassembly and assembly of the vibration motor shall be carried out in a clean place; 2 All parts and components shall be cleaned and deburred before assembly; 3 The bearing inner and outer rings shall not be knocked directly; 4 All assembly surfaces shall be coated with lubricating oil, such as lithium grease before assembly; 5 Carefully check the sealing ring of stainless steel shale shaker, and replace it in time if it is aged or damaged; 6 Install proper amount of lubricating oil, such as lithium grease, etc.; 7 When assembling Y-type sealing ring, pay attention to the end face facing inward; 8 Fasten all bolts as required, and fasten them every one or two days at the initial stage of installation, more than three times in a row, and then check every two days V analysis of the causes of the vibration crack of the stainless steel vibrating screen and the treatment methods according to the principle of fracture mechanics, the stainless steel vibrating screen frame trembles during the working process, resulting in bending fatigue, which is prone to local deformation or vibration crack of the screen frame, side plate, etc The main reasons for the vibration crack of stainless steel vibrating screen in use are as follows: 1 The failure of damping spring After long-term use, the spring is deformed due to aging of rubber or long-term stress, which makes the spring failure, resulting in different supporting points of four sets of damping spring seats of stainless steel shale shaker body, resulting in different amplitudes of all parts of stainless steel shale shaker, resulting in vibration cracks at the chain connection parts of stainless steel shale shaker or cracks at the welding joints of connecting parts Solution: the vibration damping spring should be checked regularly, and the spring material is generally 60Si2MnA, and the heat treatment hardness should reach HRC45-50 2 The quality of eccentric wheel of vibration motor has deviation The function of eccentric wheel on the vibrating motor is to make the shale shaker vibrate Its quality directly affects the vibration amplitude of the shale shaker There is deviation in the quality of the eccentric wheel The vibration force generated during the operation is scattered, which is reflected on the screen body of the stainless steel shale shaker The vibration amplitude of each part is different, causing the vibration crack of the connecting part of the stainless steel shale shaker or the weld crack of the connecting part Solution: control the quality deviation of the eccentric wheel on the vibration motor, and check the wear condition regularly 3 The weight vertical line of eccentric wheel does not coincide with the natural weight vertical line When installing the vibration motor, after connecting the vibration motor with universal coupling, affected by the torque of the transmission shaft, the corresponding heavy vertical line of the eccentric wheel will not coincide with the natural heavy vertical line, resulting in the asynchronous rotation of the eccentric wheel The vibration amplitude of each part of the stainless steel vibrating screen is not the same, and the vibration crack of the connecting part or the weld opening of the connecting part of the stainless steel vibrating screen will occur Solution: install the vibration motor and check the coincidence of the eccentric heavy vertical line and the natural heavy vertical line Regular shutdown inspection 4 If the eccentric weight of the vibrating motor is not suitable, the eccentric weight is not suitable, which will also unbalance the amplitude of the stainless steel shale shaker; if the counterweight is increased too much, it will make the amplitude exceed the allowable value, which will cause the vibration crack of the stainless steel shale shaker's connecting part or the welding joint crack of the connecting part Solution: according to the factory parameters of stainless steel shale shaker, set eccentric wheel balance weight in strict accordance with the standard, and conduct regular inspection 5 The broken screen frame of stainless steel vibrating screen with thin screen plate may also be the cause of the thin screen plate Solution: the solution to this problem is to properly thicken the side plate, or add additional plate to the side plate near the vibrating motor to enhance the rigidity of the whole stainless steel vibrating screen, so that the screen frame is not easy to vibrate and fracture During repair welding, the weld shall be along the longitudinal direction of the screen frame, and no transverse weld is allowed, otherwise the pipe beam is more likely to break from the transverse weld In a word, the improper selection and low quality of the vibrating motor lead to the fracture and deformation of the screen frame of the stainless steel vibrating screen, which seriously affect the production efficiency and the service life of the equipment Jinjiashun machinery, as a regular stainless steel vibrating screen manufacturer, adopts reasonable design and accessories The whole machine has a service life of 3-5 years Under the correct operation and maintenance measures, the above serious quality problems will not occur Therefore, it is suggested that you must polish your eyes when purchasing to avoid worries.
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