Electromechanical Lifting System with Gas-Loaded Thrust Cylinder
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Solution Overview
Problem
Existing electromechanical lifting systems for pumping machines suffer from limited load capacity and short service life due to overheating and mechanical stress on the motor nut and screw, restricting their ability to lift heavy loads and maintain precision.
Innovation Solution
The design incorporates a gas-filled tubular system with a thrust cylinder that isolates the gas load from the motor nut, using a ball screw or roller screw mechanism with lubrication and cooling, and a control system with sensors for precise load handling and environmental adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an electromechanical lifting system with motor nut and screw is used, then high control of speed and positioning is achieved, but the load capacity is limited and service life is short due to overheating and mechanical stress
Solution Approach 1:
The lifting system is divided into two independent functional parts: a first lifting system (electromechanical with motor, nut, and screw) that provides precise positioning control, and a second lifting system (hydraulic or pneumatic with cylinder) that provides high load capacity. This segmentation allows each subsystem to be optimized for its specific function without compromise.
Solution Approach 2:
The patent combines two different lifting systems (electromechanical and hydraulic/pneumatic) into a single integrated system. The first lifting system handles precision positioning while the second lifting system handles heavy loads, merging their capabilities to achieve both high precision and high load capacity simultaneously.
2Measurement precision
If an electromechanical lifting system with motor nut and screw is used, then high control of speed and positioning is achieved, but the service life is short due to overheating and mechanical stress
Solution Approach 1:
The lifting system is divided into two independent functional parts: a first lifting system (electromechanical with motor, nut, and screw) that provides precise positioning control, and a second lifting system (hydraulic or pneumatic with cylinder) that provides high load capacity. This segmentation allows each subsystem to be optimized for its specific function without compromise.
Solution Approach 2:
The patent combines two different lifting systems (electromechanical and hydraulic/pneumatic) into a single integrated system. The first lifting system handles precision positioning while the second lifting system handles heavy loads, merging their capabilities to achieve both high precision and high load capacity simultaneously.
3Ease of manufacture
If hydraulic cylinders are used for force transmission, then simple and economical construction is achieved, but low precision on speed and positioning is obtained
Solution Approach 1:
The lifting system is divided into two independent functional parts: a first lifting system (electromechanical with motor, nut, and screw) that provides precise positioning control, and a second lifting system (hydraulic or pneumatic with cylinder) that provides high load capacity. This segmentation allows each subsystem to be optimized for its specific function without compromise.
Solution Approach 2:
The patent combines two different lifting systems (electromechanical and hydraulic/pneumatic) into a single integrated system. The first lifting system handles precision positioning while the second lifting system handles heavy loads, merging their capabilities to achieve both high precision and high load capacity simultaneously.
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 configuration allows for lifting heavier loads with a longer service life, improved precision, increased operation speed, and reduced noise, while maintaining energy efficiency and preventing overheating.
Implementation Method 1
using a ball screw or roller screw mechanism with lubrication and cooling
Implementation Method 2
using a ball screw or roller screw mechanism with lubrication and cooling
Implementation Method 3
The present invention also refers to a ground machine for artificial lift of oil from subsoil wells by means of pumping rods comprising the lifting system and comprising two tubular elements, extending vertically and parallel between them, containing pressurized gas
Implementation Method 4
a thrust cylinder that isolates the gas load from the motor nut
Implementation Method 5
The lower portion of the thrust cylinder inserted inside the first cylinder houses a chamber collecting a lubrication and cooling oil
Implementation Method 6
using a ball screw or roller screw mechanism with lubrication and cooling
Implementation Method 7
using a ball screw or roller screw mechanism with lubrication and cooling
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
Pumping machine (650, 750) comprising: - at least two tubular elements (651, 751) containing pressurized gas and extending vertically in parallel and interconnected between them by means of a connecting element (652, 752); and - an electromechanical lifting system (600, 700) comprising a first cylinder (601, 701), interconnected to the tubular elements (651, 751) and comprising a substance compressible by a piston (601b, 701b); and a screw (602, 702) with a vertical axis Y coinciding with the axis of the pumping machine (650, 750). The screw (602, 702) is inserted inside a second thrust cylinder (658, 758), connected in sliding manner inside the first cylinder (601, 701), and has a first end (602b, 702b) fixed to the connecting element (652, 752) and a second end (602a, 702a) configured for sliding inside the thrust cylinder (658, 758) and overlying a chamber (605, 705) comprising lubrication and cooling oil overlying the piston (601b, 701b).