How to avoid zero differential speed in decanter centrifuge
Horizontal screw centrifuge is a horizontal screw unloading, continuously operated sedimentation equipment, widely used in industrial fields such as sludge dehydration particle size classification and liquid phase clarification. Its core working principle is that the drum and the screw rotate at high speed in the same direction with a certain differential speed, and the materials are separated by centrifugal force. However, the zero differential speed may affect the separation effect of the centrifuge and even cause equipment failure. This article will discuss how to avoid the problem of zero differential speed in horizontal centrifuge.
Analysis of the reasons for differential failure
1. Excessive differential load:
Excessive centrifuge speed will increase the load of the differential, which may cause serious wear of the internal components of the differential, thus affecting the normal operation of the differential.
2. Lubrication system problems:
Insufficient or deteriorated differential lubricating oil or lubrication system failure (such as oil pump failure, oil pipe blockage) will lead to poor lubrication, increase the friction of the internal components of the differential, and thus affect the normal operation of the differential.
3. Improper installation of the differential:
Loose installation of the differential or damage to internal parts will cause the differential to work unstably, or even zero differential.
4. Material imbalance:
Uneven distribution of materials in the centrifuge will cause vibration and affect the normal operation of the differential.
Measures to avoid zero differential
1. Adjust the speed:
According to the separation requirements of the centrifuge, reasonably adjust the speed to reduce the load of the differential and avoid damage to the differential due to excessive speed.
2. Strengthen lubrication management:
Regularly check the quality and supply of differential lubricating oil to ensure that the quality and supply of lubricating oil are sufficient. At the same time, regularly maintain the lubrication system to prevent oil pump failure and oil pipe blockage.
3. Correctly install the differential:
Ensure that the differential is installed correctly and tightened reliably to avoid loosening of the differential or damage to internal parts due to improper installation.
4. Material balance:
During the operation of the centrifuge, ensure that the material is evenly distributed in the drum and spiral to avoid vibration caused by material imbalance.
Regular inspection and maintenance
1. Check the differential parts:
Use professional tools to measure the temperature, vibration and other parameters of the differential regularly, and compare them with normal values to determine the operating status of the differential. If abnormalities are found, replace the internal parts of the differential that are severely worn in time.
2. Maintain other related parts:
In addition to the differential itself, other related parts of the centrifuge, such as the lubrication system and cooling system, need to be inspected and maintained to ensure that the equipment is in good condition.
3. Develop a regular maintenance plan:
According to the use of the centrifuge and equipment requirements, develop a detailed regular maintenance plan to ensure the long-term stable operation of the equipment.
Strengthen the training and management of operators
1. Improve operating skills:
Strengthen the training of operators, improve their familiarity with the equipment and operating skills, and avoid equipment failures caused by improper operation.
2. Formulate operating procedures：
Formulate detailed operating procedures, clarify the responsibilities and operating requirements of operators, and ensure the correct operation of equipment.
Application of constant differential speed and constant torque control algorithm
In the control system of the centrifuge, the constant differential speed and constant torque double closed-loop PID control algorithm is used to adjust the centrifuge differential speed and torque online to ensure that the equipment is in an efficient and stable working state. When the concentration of the separated material of the centrifuge is relatively stable, constant differential speed control is mainly used; when the concentration of the separated material fluctuates greatly, the main motor speed is adjusted by constant torque control first, and then the constant differential speed control is used to achieve a better separation effect.
To avoid the zero differential speed of the horizontal screw centrifuge, it is necessary to start from many aspects, including adjusting the speed, strengthening lubrication management, correctly installing the differential, ensuring material balance, regular inspection and maintenance, and strengthening the training and management of operators. Through the implementation of these measures, the long-term stable operation of the centrifuge can be ensured, and the separation effect and service life of the equipment can be improved.