Piston Pump Oil Return Structure for Complete Automatic Reflow
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Solution Overview
Problem
Conventional piston pumps require manual operation to return oil to the storage container after pressure reaches a set value, which is inconvenient and inefficient.
Innovation Solution
An automatic oil return structure that includes a main body assembly with specific channels and controlling units, which automatically redirects oil back to the storage container when pressure reaches a set value, using elastic units and pressure regulating mechanisms to maintain the oil return passage open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a safety valve is used to release pressure when oil reaches a set value, then the pressure can be controlled, but the valve closes instantly when pressure drops to zero, preventing complete oil return
Solution Approach 1:
The system uses the oil pressure itself to automatically control the blocking unit and opening unit, eliminating the need for manual operation. When oil pressure reaches the set value, it automatically pushes the blocking unit to open the safety channel and the opening unit to ensure complete oil return, making the system self-regulating without human intervention.
Solution Approach 2:
The system implements a feedback mechanism where the oil pressure is continuously monitored and used to control the blocking and opening units. The pressure feedback triggers the blocking unit to close the first main channel when pressure exceeds the set value, and activates the opening unit to open the safety channel, creating a closed-loop control system that automatically maintains pressure within safe limits.
2Speed
If the safety valve opens instantly when pressure reaches set value, then pressure relief is rapid, but the valve closes too quickly allowing most oil to remain in the housing
Solution Approach 1:
The opening unit acts as an intermediary mechanism between the pressure drop and the safety channel opening. When pressure drops to zero, the opening unit is pushed by the elastic unit to open the safety channel, allowing oil to flow back gradually rather than requiring the valve to remain open continuously, thus ensuring complete oil return while maintaining rapid pressure response.
Solution Approach 2:
The elastic unit is pre-loaded to push the opening unit into position before pressure drops. When pressure drops to zero, the pre-loaded elastic unit immediately pushes the opening unit to open the safety channel, ensuring that the oil return path is activated promptly and completely, allowing all oil to return to the storage container.
3Quantity of substance
If manual pressing of the oil reflow lever is required to return all oil, then complete oil return can be achieved, but operational convenience is significantly reduced
Solution Approach 1:
The blocking unit and opening unit work together as a self-service system that automatically manages the complete oil return process. The blocking unit closes the first main channel when pressure exceeds the set value, and the opening unit opens the safety channel when pressure drops, allowing all oil to return automatically without any manual intervention, thus achieving both complete oil return and operational convenience.
Solution Approach 2:
The system uses oil pressure feedback to automatically control the blocking and opening units throughout the oil return process. The continuous pressure monitoring ensures that the blocking unit remains closed when pressure is high and the opening unit activates when pressure drops, creating an automatic feedback-controlled system that completes the entire oil return cycle without manual intervention.
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
Facilitates automatic and efficient oil return to the storage container, improving operational convenience by eliminating the need for continuous manual lever pressing and ensuring all oil is returned, ready for the next use.
Implementation Method 1
a blocking unit and an elastic unit. The elastic unit pushes the blocking unit to block the first main channel
Implementation Method 2
When the pressure of the oil reaches the set value, the blocking unit will be pushed away by the pressurized oil
Implementation Method 3
the opening unit will be pushed to push the blocking unit to open the safety channel
Data Source
AI summary
An automatic oil return structure has a main body assembly mounted between an oil storage container and a housing, and having a pressure regulating blocking unit, a pressure regulating elastic unit, an engaging unit, and an engaging elastic unit. The pressure regulating elastic unit pushes the pressure regulating blocking unit to block a first pressure regulating channel. An engaging groove is formed radially inward on the pressure regulating blocking unit. The engaging elastic unit pushes the engaging unit toward the pressure regulating blocking unit. When a pressure in the first pressure regulating channel is higher than a set value and the pressure regulating blocking unit is pushed away to a set distance, the engaging unit is pushed to engage with the engaging groove of the pressure regulating blocking unit such that the pressure regulating blocking unit is unmovable to avoid blocking the first pressure regulating channel.