Hydraulic Motor Tool Force Cutoff via Return Valve Pressure Drop
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Solution Overview
Problem
Existing motor-actuated tools struggle to terminate a working process accurately at the right force without exceeding a general working force, leading to potential damage or inefficiency.
Innovation Solution
A method and tool design that utilizes a pressure increase characteristic change to trigger the opening of a return valve, causing a pressure drop to deactivate the motor, ensuring the working process ends at the correct force without further pressure increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the motor continues to operate after reaching the certain working force, then the general working force can be reached, but the working process exceeds the required force and causes potential damage or inefficiency
Solution Approach 1:
The system continuously monitors pressure in the hydraulic medium and uses this feedback to detect the characteristic change that signals the certain working force has been reached. This real-time feedback enables precise termination of the working process before excessive force is applied, resolving the contradiction between measurement precision and tool integrity.
Solution Approach 2:
The return valve is opened in advance when the characteristic pressure change is detected, creating a pressure drop that subsequently deactivates the motor. This preliminary action prevents the motor from continuing to generate excessive force, thereby protecting the tool while achieving precise force termination.
2Measurement precision
If the return valve is opened immediately when the certain working force is reached, then the working process terminates precisely, but the motor remains active causing unnecessary energy consumption
Solution Approach 1:
The system monitors the pressure drop caused by opening the return valve and uses this feedback signal to deactivate the motor. When the pressure drops below a threshold after the return valve opens, the control device stops the motor, eliminating unnecessary energy consumption while maintaining precise force termination.
Solution Approach 2:
The hydraulic system itself provides the signal for motor deactivation through the pressure drop that occurs when the return valve opens. The motor deactivates automatically in response to this self-generated signal, eliminating the need for separate sensing mechanisms and reducing energy consumption.
3Use of energy by moving object
If the motor is deactivated immediately when the certain working force is reached, then energy is saved, but the pressure drop signal cannot be utilized for controlled termination
Solution Approach 1:
The return valve is opened first to create the pressure drop condition, and only then is the motor deactivated in response to the pressure drop signal. This preliminary opening of the return valve enables the system to utilize the natural pressure change as a control signal, achieving both energy efficiency and ease of operation.
Solution Approach 2:
The pressure drop in the hydraulic medium serves as an intermediary signal between the return valve opening and motor deactivation. This intermediate pressure signal enables smooth, controlled termination of the working process while saving energy, as the motor responds to the pressure change rather than requiring direct mechanical feedback.
4Adaptability or versatility
If the tool allows force increase to the general working force, then the motor can complete full compression, but the applied force exceeds what is needed for the certain working process
Solution Approach 1:
The system monitors pressure characteristics in real-time and detects when the certain working force has been reached through the characteristic pressure change. This feedback enables early termination of the working process, preventing the motor from continuing to apply excessive force and waste energy, while the tool retains the capability to reach general working force if needed.
Solution Approach 2:
The tool is designed with the capability to reach the general working force (excessive action capability), but the control system terminates the process early at the certain working force based on detected pressure characteristics. This partial action approach prevents energy waste while maintaining the tool's full adaptability for different applications.
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
Enables precise termination of the working process at the appropriate force, preventing excessive force application and ensuring a gentle operation, thus maintaining tool integrity and efficiency.
Implementation Method 1
a hydraulic medium is used for applying the force
Implementation Method 2
opening of a return valve in order to allow the hydraulic medium to once again flow into a reservoir
Data Source
AI summary
The described solution pertains to a motor-actuated tool and a method for operating same. A certain working process requires an increase of an applied force to a certain working force. A hydraulic medium located in a piston/cylinder of the tool applies the force and the working process no longer requires any higher force after the certain working force has been reached. The tool allows an increase of the force to a general working force that exceeds the certain working force. Reaching the certain working force results in a characteristic change of the pressure increase in the hydraulic medium. Upon reaching the characteristic change, the return valve is initially opened and a pressure drop in the hydraulic medium, which occurs as a result of opening the return valve, is used as a signal for deactivating the motor, wherein a control of the tool is designed accordingly.