Pump Cold-Start Plate Spring Mounting
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Solution Overview
Problem
Existing pumps without a casing face challenges in supporting and securing the spring element for the cold-start plate, leading to potential loss during transportation, dispatch, or installation, especially in cartridge pumps inserted into gear casings.
Innovation Solution
The spring element is supported and secured directly on the pressure plate, eliminating the need for additional supporting elements and ensuring the cold-start plate is reliably held in place, preventing loss and enhancing pump assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring element is not secured on the pressure plate, then the structure is simpler, but the spring element and cold-start plate may be lost during transportation, dispatch, or installation
Solution Approach 1:
The spring element is integrated with the pressure plate by securing it directly onto the pressure plate surface. This merging of components ensures that the spring element cannot be lost during transportation, dispatch, or installation, while maintaining a relatively simple overall structure. The spring element works in conjunction with the cold-start plate to provide the necessary mechanical function.
2Reliability
If additional supporting elements are used to secure the spring element, then part retention is improved, but the device complexity increases
Solution Approach 1:
Instead of using additional supporting elements, the spring element is directly secured on the pressure plate, merging the securing function into the existing component structure. This approach improves part retention while avoiding the need for extra supporting elements that would increase device complexity.
3Device complexity
If the cold-start plate is not preloaded against the pressure plate, then the spring element structure is simpler, but the cold-start characteristics are poor
Solution Approach 1:
The spring element is preloaded against the cold-start plate, which in turn is preloaded against the pressure plate. This preliminary action ensures that the cold-start plate is positioned correctly and exerts the necessary force on the delivery elements during startup, improving cold-start characteristics without requiring a complex preload mechanism.
4Device complexity
If the spring element is supported on the pressure plate, then additional supporting elements are eliminated, but the spring element must be securely attached to prevent loss
Solution Approach 1:
The spring element is secured directly on the pressure plate, eliminating the need for separate supporting elements. The securing mechanism is integrated into the pressure plate structure, simplifying the overall design while ensuring that the spring element remains firmly attached during transportation, dispatch, and installation.
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 configuration simplifies the cold-start mechanism, prevents part loss, and securely holds the cold-start plate and spring element on the pump, even without a casing, improving startup characteristics and installation reliability.
Implementation Method 1
a cold-start plate which is preloaded against the pressure plate by means of a spring element in such a way that, at least when the pump is stationary, the cold-start plate closes the at least one opening in the pressure plate to the external surroundings of the pressure plate
Implementation Method 2
the spring element is supported on the pressure plate so as to introduce preloading forces into the cold-start plate
Data Source
AI summary
A pump having a stroke ring which has an axial recess, a rotor which is received in the axial recess so as to be rotatable relative to the stroke ring, wherein the rotor has radial recesses in which delivery elements are displaceable received as viewed in a radial direction, a side plate which closes off the axial recess on a first side, a pressure plate which closes off the axial recess on a second side, wherein the pressure plate has at least one opening, wherein a pressure region of the pump is fluidically connected to external surroundings of the pressure plate through the at least one opening, and wherein at least one fluid path is provided from the pressure region of the pup into an under-vane region of the delivery elements, and a cold-start plate which is preloaded against the pressure plate by means of a spring element such that, at least when the pump is at a stand-still, the cold-start plate closes the at least one opening in the pressure plate to the external surroundings of the pressure plate. The pump is characterized in that the spring element is supported on the pressure plate so as to introduce preload forces into the cold-start plate, and in that the spring element is fastened to the pressure plate.