Research on Nonconstant and Discontinuous Pumping Characteristics of the Concrete Pump Truck

The nonconstant concrete flow due to the alternating pumping of the twin cylinder of the hydraulic pump will cause vibration of concrete pump trucks. Furthermore, the discontinuous pumping of concrete caused by inadequate suction and air doping will exacerbate the vibration. In order to study the ef...

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Bibliographic Details
Published in:Lubricants 2023-05, Vol.11 (5), p.217
Main Authors: Ren, Yafeng, Bi, Chunyang, Lu, Wenwen, Zhi, Jinning, Yang, Weifeng, Li, Jie, Wang, Haiwei
Format: Article
Language:English
Subjects:
Boundary conditions
concrete
discontinuous pumping
Discrete element method
Dynamic response
Dynamic stability
Hydraulic equipment
Influence
nonconstant pumping
Pipe bends
pipe pressure
pipe wall excitation force
Pumping
Rheological properties
Rheology
Shear stress
Simulation
Suction
Trucks
Velocity
Vibration
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Summary:The nonconstant concrete flow due to the alternating pumping of the twin cylinder of the hydraulic pump will cause vibration of concrete pump trucks. Furthermore, the discontinuous pumping of concrete caused by inadequate suction and air doping will exacerbate the vibration. In order to study the effect of nonconstant and discontinuous pumping of concrete on the dynamic response and vibrational stability of the whole vehicle, multi-fluid pumping models with concrete-lubrication gas for straight and elbow pipes are established, respectively, and the boundary conditions of periodic pumping speed are taken into account to compare the rheological characteristics of concrete and the exciting force on the pipe wall under nonconstant pumping, discontinuous pumping and nonconstant discontinuous pumping conditions. Results show that the pipe pressure and the exciting force vary periodically with the pumping speed under nonconstant pumping conditions, and the peak-to-peak value of the pipe pressure and excitation for discontinuous pumping depend on the volume fraction and distribution state of the gas in the pipe.
ISSN:2075-4442
2075-4442
DOI:10.3390/lubricants11050217