Positive Displacement Pump Axial Blade Locking Mechanism
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Solution Overview
Problem
Conventional displacement pumps, such as hydraulic pumps, consume significant energy and generate unnecessary CO2 emissions as they continue to operate even when the vacuum required for braking has been built up, necessitating a mechanism to easily lock blades in the rotor and reduce energy consumption.
Innovation Solution
A locking mechanism that engages blades tractionally or frictionally within the rotor, ensuring they are securely locked in an idle position when not in use, thereby reducing energy consumption and emissions by decoupling rotational movement from the control element and using a flexible blocking element with a recess and expansion element for radial and axial locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the displacement pump continues to operate to ensure vacuum availability, then the vacuum supply reliability is improved, but the energy consumption increases significantly
Solution Approach 1:
The pump transitions from static continuous operation to dynamic on-demand operation. The locking mechanism enables the pump to switch between operational and locked states based on actual vacuum requirements, allowing the system to adapt its energy consumption to actual needs while maintaining reliability when vacuum is required.
Solution Approach 2:
The pump's operational parameters are changed by locking the blades in specific positions to stop the displacement operation. This parameter change (from rotating to locked position) dramatically reduces energy consumption while maintaining the ability to restore operational parameters when vacuum is needed.
2Reliability
If the blades are locked in the rotor using conventional positive engagement, then the locking reliability is improved, but the ease of operation deteriorates due to complex mechanisms
Solution Approach 1:
The patent replaces complex mechanical positive engagement locking systems with a simpler friction-based locking mechanism. The blocking element creates frictional contact with the blade to hold it in the retracted position, eliminating the need for complex notched extensions, hook spaces, or pressurization systems while maintaining sufficient locking reliability.
Solution Approach 2:
The invention extracts and eliminates unnecessary complex locking components from the system. By using a simple blocking element that relies on friction rather than positive mechanical engagement, the design removes complicated mechanisms while achieving the essential locking function.
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 solution drastically reduces energy requirements and CO2 emissions by ensuring the pump is 'switched off' when not needed, with the blades being securely locked in their retracted position, allowing for efficient operation and reactivation when required.
Implementation Method 1
a blocking element (84), which can be expanded radially through axial displacement of an expansion element (92)
Implementation Method 2
A locking mechanism (36) inhibits the displacement of the blade (16) inside the rotor (14) by engaging the blade tractionally or frictionally
Data Source
AI summary
The invention relates to a positive displacement pump, including a pot-shaped housing, a rotor rotatably supported in the housing, and at least one blade movably guided in the rotor, the blade tip of which contacts the inner circumferential wall of the housing and divides the interior into chambers, wherein a locking mechanism that inhibits or brakes the movement of the blade in the rotor is provided.