Integrated centrifugal machine dynamic balancing device and balancing method

Abstract

The invention discloses an integrated centrifugal machine dynamic balancing device and balancing method. According to the integrated centrifugal machine dynamic balancing device and the integrated centrifugal machine dynamic balancing method, balancing capacity is only related to self weight of a rocker arm system and axial translation displacement of rocker arms, and is not limited by aspects like capacity of a centrifugal machine, mass of movable clump weights and moving distance; the speed of a centrifugal field is only dozens of times that of gravitational acceleration due to mounting positions, the requirement on G value tolerance capacity of the entire balancing device is not high, and the device can reliably operate under a large-G value working condition; the entire dynamic balancing adjusting process of the centrifugal machine rocker arms is a double-closed loop control process and comprises a position closed loop feedback control inner ring between rocker arm practical offsettranslation and motion control of a hydraulic servo system and a force feedback closed loop control outer ring composed of rocker arm unbalanced force monitoring and unbalanced force control; and safe, reliable and accurate operation of an unbalanced force dynamic balancing system can be effectively guaranteed through a double-closed loop control method, and real-time updating, on-line monitoringand dynamic balancing can be carried out on unbalanced force under operation of the centrifugal machine.

Description

technical field [0001] The invention belongs to the technical field of dynamic trimming of centrifuges, and in particular relates to a dynamic trimming device and a trimming method of an integral centrifuge. Background technique [0002] All rotating machinery should be as balanced as possible. The unbalanced force will cause dynamic load during the operation of the centrifuge and cause equipment vibration, resulting in reduced system operation stability and accuracy, increased motion noise, accelerated wear of moving parts, and abnormal rotors. Running, life shortening and even host overturning seriously affect the operation safety of the whole centrifuge. Therefore, it is necessary to balance the unbalanced force no matter before or during the operation of the centrifuge. [0003] At present, most domestic centrifuges are trimmed using a static trim method. That is: based on the principle of moment balance, in the non-working state, the counterweight of a certain mass is...

AI Technical Summary

Problems solved by technology

The static balancing method using the counterweight type or electric drive mobile counterweight will not change again once it is installed or adjusted, and it does not have the ability to balance the unbalanced force on the test piece under the working state of the centrifuge

[0007] 2. The design and selection of motor-driven static / dynamic trim methods are difficult

[0008] The motor-driven trim device needs to bear at least dozens of G centrifugal loads during the working process of the centrifuge, and it is difficult to select a motor that works reliably in a strong centrifugal field environment, and the core components such as the screw and nut of the transmission mechanism are even more difficult. It is difficult to meet the requirements of high centrifugal field, and the design of the trim device is limited by many factors such as the speed of the centrifuge and the installation position of the device

[0009] 3. The response speed of the hydraulic drive mode is slow, the stroke is limited, and the trimming ability is limited

[0010] Although the hydraulic drive method has a large load capacity, the response speed of the hydraulic drive process is relatively slow and the stroke is limited compared with the motor drive and water drive. Heavy mode trim ability is very limited

[0011] 4. With the water-driven dynamic trim method, it is difficult to precisely control the water flow, and the trim accuracy is limited. In a strong centrifugal field, it is easy to produce negative effects such as overshoot

[0012] During the process of water trimming, the flow rate of water can reach 100 meters per second under the action of strong centrifugal force, it is difficult to accurately control the water flow, and the trimming accuracy is difficult to control

The instantaneous impact of the high-speed water flow on the water tank and the jib is huge, which may easily cause shocks to the equipment and introduce unsafe factors

In addition, the water flow direction in the process of water leveling is irreversible, only one-way water injection can be realized, reverse drainage cannot be realized, and feedback dynamic trimming cannot be realized. When the centrifuge is running with a large G value, trim overshoot is very easy to occur

[0013] 5. The trimming methods of the traditional technology are limited by the capacity of the centrifuge, the mass of the moving counterweight, the moving distance of the counterweight, etc., and the trimming range and ability are very limited.

The small mass and small moving range of the trimming device will lead to insufficient trimming ability; the large mass and large moving range of the trimming device will lead to the heavy structure of the trimming device, occupying a large working space and significantly increasing the load of the centrifuge, which will make the design of the centrifuge difficult Increase and decrease of comprehensive performance index

Therefore, the traditional trimming methods have very limited trimming capabilities, and it is difficult to have a wide range of trimming capabilities

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