Concrete Pump Piston Synchronization via Electric Ball Screw Drive
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Solution Overview
Problem
Existing concrete pumping apparatuses face issues with piston synchronization, leading to performance loss and complex maintenance due to their oil-dynamic system-driven design.
Innovation Solution
The apparatus employs a compact design with electrically driven pistons, utilizing threaded rods and ball screws to achieve precise synchronization through alternating rotation, eliminating the need for an oil-dynamic system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oil-dynamic system is used to drive and synchronize the two pumping pistons, then the pistons can be driven alternately, but the synchronization between the two pistons is not precise and may lead to asynchrony
Solution Approach 1:
The patent replaces the oil-dynamic system with a direct mechanical drive system. The motor is mechanically coupled to both pumping pistons through a common drive mechanism, eliminating the need for hydraulic fluid transmission. This mechanical coupling ensures precise synchronization of the two pistons while reducing system complexity and eliminating issues related to hydraulic fluid leakage, contamination, and pressure loss.
Solution Approach 2:
The motor serves a dual function by simultaneously driving both pumping pistons through a shared mechanical connection. This multi-functional approach eliminates the need for separate drive systems for each piston, reducing overall system complexity while maintaining precise synchronization through the common drive mechanism.
2Ease of operation
If an oil-dynamic system is used to control the pumping pistons, then the pistons can be synchronized, but the construction layout becomes complex and maintenance is difficult
Solution Approach 1:
The patent replaces the complex oil-dynamic control system with a simplified mechanical drive system. The motor is directly mechanically coupled to both pumping pistons through a common drive mechanism, eliminating the need for hydraulic lines, valves, and pumps. This results in a compact construction layout that is easier to operate and maintain, with fewer components that could fail or require servicing.
3Productivity
If an oil-dynamic system is used to drive the pumping pistons, then the pistons can be actuated, but the system suffers from performance loss and possible malfunctions
Solution Approach 1:
The patent replaces the oil-dynamic system with a direct mechanical drive system where the motor is mechanically coupled to both pumping pistons. This eliminates energy loss associated with hydraulic fluid compression, leakage, and heat generation. The direct mechanical connection ensures reliable power transmission and stable system operation, preventing malfunctions related to hydraulic system failures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures precise piston synchronization, enhances operational efficiency, and simplifies maintenance by reducing complexity and eliminating hydraulic system-related issues.
Implementation Method 1
threaded rods which are driven in rotation by the motor with a respectively opposite and alternating sense of rotation, and on which respective bushing elements, which are integral with the first piston and the second piston respectively, are mobile, being screwed and unscrewed in relation to the sense of rotation in order to generate the alternating motion
Data Source
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AI summary
Pumping apparatus (10) for pumping concrete, or similar material, comprising at least one pumping unit (11) having both a first pumping cylinder (16) and a second pumping cylinder (17), and also a first pumping piston (21) and a second pumping piston (22) both mobile with a respectively alternating motion inside respective chambers (19, 20) present in the first cylinder (16) and in the second cylinder (17), respectively. The apparatus comprises a motor (31), preferably electric, to drive the first and second piston (21, 22) with an alternating motion by means of suitable movement means (26, 27).