Pumping Unit Balance Weights Motorized Adjustment
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Solution Overview
Problem
Current methods for balancing a pumping unit in oil extraction are labor-intensive, imprecise, and require manual intervention, often resulting in energy loss and inefficiency due to the need for manual adjustment of balance weights during machine shutdown.
Innovation Solution
An intelligent online closed-loop balance adjusting system that automatically adjusts balance weights using a connecting rod mechanism, balance weight displacement adjusting motor, and control device, allowing for real-time adjustments without shutting down the machine, ensuring precise ±10% balance and reducing manual labor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of balance weights is used, then the balance can be adjusted, but the labor intensity is large and the adjustment is imprecise
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated motor-driven system. The balance weight adjustment motor (1) drives the connecting rod (7) through the transmission device to automatically move balance weights, eliminating manual labor and improving precision through controlled motor movement rather than manual handling.
Solution Approach 2:
The system enables self-service balance adjustment where the pumping unit automatically detects imbalance conditions and adjusts its own balance weights without external intervention. The control device (17) monitors motor current and angular displacement to autonomously control the adjustment process, making the system self-regulating.
2Productivity
If balance weights are adjusted manually, then adjustment can be made, but the adjustment must be executed after shutting the machine down
Solution Approach 1:
The patent transforms the static balance adjustment process into a dynamic one that can occur during operation. The balance weight adjustment motor (1) can activate while the pumping unit is running, allowing real-time balance correction without interrupting production. The connecting rod mechanism (7) dynamically repositions balance weights during operational cycles.
Solution Approach 2:
The system maintains continuous operational capability by enabling balance adjustment during running hours. The control device (17) monitors motor current (16) and angular displacement (12) continuously, allowing the adjustment process to proceed without machine shutdown, thus eliminating production loss and maintaining continuous useful action.
3Manufacturing precision
If traditional balance adjustment method is used, then the structure is simple, but the balance weights are easy to lose and the adjustment is not precise
Solution Approach 1:
The patent introduces the connecting rod (7) as an intermediary mechanical linkage between the motor (1) and balance weights (8). This intermediary mechanism provides controlled, precise movement of balance weights through the transmission device, preventing loss by securing weights in designated positions during adjustment while maintaining reliability through the mechanical connection.
4Extent of automation
If automatic balance adjustment system is implemented, then manual labor is eliminated and precision is improved, but the device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by integrating the balance weight adjustment motor (1) into the existing pumping unit structure. The same motor and connecting rod mechanism (7) serve both the balance adjustment function and the existing pumping operation, allowing one component to perform multiple functions rather than adding separate dedicated adjustment mechanisms.
Solution Approach 2:
The control device (17) implements feedback control by monitoring motor current (16) and angular displacement (12) to regulate the balance weight adjustment process. The single chip machine controller (17) uses real-time feedback from sensors to automatically adjust motor operation, achieving precise control through closed-loop feedback rather than complex open-loop control systems.
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
The system enables stable, efficient, and cost-effective operation by allowing online real-time adjustments, reducing energy consumption, and eliminating manual intervention, thus improving working efficiency and lowering maintenance needs.
Implementation Method 1
The transmission device is a lead screw transmission device, the lead screw transmission device comprises a lead screw and a nut
Implementation Method 2
the balance weight displacement adjusting motor is connected with one end of the connecting rod through the transmission device
Data Source
AI summary
The invention relates to an intelligent online closed-loop balance adjusting system for a pumping unit. The system comprises a connecting rod, balance weights, a transmission device, a balance weight displacement adjusting motor and a control device used for driving the motor to adjust and control the weight displacement. The transmission device and the balance weight displacement adjusting motor are arranged above a walking beam. The balance weight displacement adjusting motor is connected with one end of the connecting rod through the transmission device, and the other end of the connecting rod is connected with balance weights. One end of the walking beam away from the horse-head is connected with the middle part of the connecting rod. The invention can realize automatic weight adjustment without shutting the machine down, and the balance weights can be adjusted with the precision of ±10%.