Piston Pump Oil Return Structure for Automatic Hydraulic Recovery
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Solution Overview
Problem
Conventional piston pumps require manual operation to return hydraulic oil to the storage bag, which is inconvenient and inefficient, as the safety valve opens only momentarily, allowing a small amount of oil to return before pressure returns to zero.
Innovation Solution
An automatic oil return structure with a main body assembly that includes multiple channels and assemblies, allowing hydraulic oil to automatically return to the oil storage container when pressure reaches a predetermined value, utilizing oil-blocking and pressure-regulating mechanisms to maintain communication between the piston's oil storage chamber and the oil returning channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a safety valve is used to release pressure, then pressure control is improved, but oil return efficiency deteriorates because the valve closes immediately when pressure drops
Solution Approach 1:
The patent introduces a main body assembly with multiple channels (pressure regulating channel, controlling channel, communicating channel, operating channel, oil returning channel) as intermediary structures. These channels work together to mediate between the safety valve and the oil storage bag, maintaining continuous oil flow paths even when the safety valve closes, thus resolving the contradiction between pressure control and oil return efficiency
Solution Approach 2:
The patent divides the oil return system into multiple independent channels and assemblies. The oil returning channel is segmented from the safety channel, and the main body assembly is divided into multiple functional channels (pressure regulating, controlling, communicating, operating). This segmentation allows different channels to perform different functions simultaneously, enabling continuous oil return while maintaining pressure control
2Quantity of substance
If manual operation of oil returning lever is required, then oil can be returned completely, but user convenience deteriorates due to continuous pressing requirement
Solution Approach 1:
The patent implements an automatic oil return system where the main body assembly automatically controls the oil return process through its internal channels and assemblies. The system uses pressure differential and mechanical linkages to automatically open and close oil return paths without requiring continuous user intervention, while still ensuring complete oil return to the storage bag
Solution Approach 2:
The main body assembly is pre-configured with multiple channels and assemblies that are ready to facilitate oil return. The communicating channel and operating channel are预先 arranged to enable automatic activation of the oil return process when pressure conditions are met, eliminating the need for users to continuously press the lever
3Stress or pressure
If safety valve opens only momentarily, then pressure release is achieved, but oil return time increases due to incomplete return
Solution Approach 1:
The patent ensures continuous oil return action through the main body assembly's multiple channels. The oil returning channel maintains an open path for continuous oil flow, and the communicating channel ensures continuous communication between chambers. This continuity allows oil to return completely without interruption, significantly reducing the time required compared to momentary safety valve operation
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 continuous and efficient return of hydraulic oil to the storage container, eliminating the need for manual operation, ensuring all oil is returned once pressure reaches a set value, improving user convenience and operational efficiency.
Implementation Method 1
When the pressure of the at least one main channel reaches a limited pressure, the pressure of the at least one main channel pushes the block controlling assembly away thereby the pressure regulating channel communicates with the communicating channel, and pushes the controlling assembly away thereby the minor channel communicates with the oil returning channel
Implementation Method 2
When a pressure of the at least one main channel is larger than a starting pressure, the pressure of the at least one main channel makes the at least one oil blocking assembly open, such that the at least one main channel communicates with the oil storage chamber of the piston
Data Source
AI summary
An automatic oil return structure is provided. The automatic oil return structure has an oil storage bag, a piston, and a main body assembly. The piston has an oil storage chamber. The main body assembly has a main channel, a piston oil channel, a pressure regulating channel, a control channel, an operation channel, a minor channel, and an oil return channel. When the pressure of the main channel achieves a limit pressure, the pressure pushes the control blocking assembly away such that the pressure regulating channel communicates with the communication channel, and the pressure also pushes the operating assembly away such that the minor channel communicates with the return channel. At the same time, the pressure of the oil storage chamber pushes the oil blocking assembly, so as to isolate the oil storage chamber from the main channel, and the oil storage chamber communicates with the oil return channel.