Pump Cold Starting Device Pressure Relief
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Solution Overview
Problem
Pumps with cold starting devices experience increased power consumption due to the need for higher pump pressure to maintain the cold starting element in its operational position, as it is constantly loaded with system pressure from the outflow region, leading to inefficiencies and higher energy usage.
Innovation Solution
The cold starting element is designed with a relief face that faces away from the pressure region and is loaded with a pressure lower than the system pressure, reducing the forces required to maintain it in its operational position, thereby reducing the pressure difference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cold starting element is constantly loaded with system pressure from the outflow region to maintain it in its operational position, then the cold starting device can reliably function, but the power consumption increases due to higher pump pressure requirements
Solution Approach 1:
The cold starting element is divided into two functionally distinct surfaces: a pressure-loaded side facing the pressure region and a relief face facing away from it. This segmentation allows different pressure conditions to act on different sides, reducing the net force required to maintain the operational position while preserving reliability.
Solution Approach 2:
The relief face is specifically designed to face away from the pressure region, creating a local area where system pressure does not act. This local quality change reduces the overall force burden on the cold starting element, thereby reducing power consumption while maintaining the necessary functional reliability.
2Stability of the object's composition
If higher pump pressure is applied to maintain the cold starting element in its operational position, then the element remains stable, but the pressure difference between pump pressure and system pressure increases leading to energy inefficiency
Solution Approach 1:
The relief face acts as a counterbalancing feature by providing a surface that does not experience system pressure loading. This creates a counter-effect that offsets the force required to maintain stability, reducing the net pump pressure needed and thereby reducing energy loss.
3Force
If the cold starting element is pressure-relieved with a lower pressure on the relief face, then the forces required to maintain operational position are reduced, but the design complexity increases
Solution Approach 1:
Instead of applying pressure relief through complex mechanical means or additional components, the invention inverts the approach by allowing the relief face to naturally face away from the pressure region. This geometric inversion simplifies the overall design while achieving force reduction.
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 design reduces power consumption while maintaining delivery capacity, as the cold starting element is pressure-relieved, allowing for lower operational forces and reduced pressure differences between pump pressure and system pressure.
Implementation Method 1
the cold starting element being configured and arranged in such a way that it can be displaced counter to the prestress into its second functional position by way of a pump pressure which is generated in the pressure region during operation of the pump
Implementation Method 2
the relief face is loaded during operation of the pump with a pressure which is smaller than a system pressure in the outflow region
Data Source
AI summary
A pump has a suction region, a pressure region, and a pressure space which has an outflow region. A rotor is connected to a shaft in which rotor delivery elements are displacably received. The rotor has expelling regions connected to the pressure region by way of a first fluid path. A cold starting device is prestressed into a first functional position to shutoff a second fluid path from the pressure region to the pressure space, and is configured to be displaced counter to the prestress into a second functional position to open the second fluid path. The cold starting device is arranged in its second functional position at least in regions with a relief face which faces away from the pressure region in a relief receptacle. The relief face is loaded during operation of the pump with a pressure being smaller than a system pressure in the outflow region.