Axial Piston Pump Swash Plate Scanning Surface Design
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Solution Overview
Problem
Conventional axial piston pump scanning systems are cumbersome and require significant design effort due to difficult access and increased size, especially at high volume flows, and do not allow direct detection of swash plate inclination, leading to potential wear-related issues.
Innovation Solution
A scanning surface is located on a separate transmitter element attached to the swash plate, allowing for easy adaptation to application-specific specifications by replacing the sensor element, with the scanning surface potentially on the swash plate's circumferential or axial surface, enabling direct detection of inclination without lengthening the adjusting pistons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the scanning surface is located on the adjusting piston, then the inclination can be detected, but the pump size increases and design complexity increases due to piston lengthening
Solution Approach 1:
The scanning surface is extracted from the adjusting piston and relocated to the swash plate itself. This separation eliminates the need to lengthen the adjusting piston, thereby reducing pump size while maintaining inclination detection capability. The sensor remains positioned to scan the scanning surface, which now resides on the swash plate rather than the piston.
Solution Approach 2:
The swash plate serves as an intermediary carrier for the scanning surface. Instead of placing the scanning surface directly on the adjusting piston, it is transferred to the swash plate, which acts as a mediating structure that enables inclination detection without requiring piston extension.
2Measurement precision
If the scanning surface is located on the adjusting piston, then inclination detection is possible, but design effort increases due to difficult access to the piston
Solution Approach 1:
The scanning surface is extracted from the adjusting piston and placed on the swash plate, which is more accessible. This relocation significantly reduces design effort because the swash plate is easier to access during manufacturing and assembly compared to the adjusting piston, eliminating the need for complex positioning arrangements.
3Productivity
If the adjusting piston is scanned, then the system can operate, but wear-related play in the joint between swash plate and piston is not accounted for
Solution Approach 1:
The swash plate itself serves as the reference element for inclination detection by carrying the scanning surface. This self-referential approach eliminates the need to measure through the adjusting piston joint, thereby automatically compensating for wear-related play in the joint between the swash plate and piston.
4Productivity
If the pump is designed for high volume flows, then productivity increases, but pump size becomes unacceptable with conventional scanning systems
Solution Approach 1:
The scanning surface is extracted from the adjusting piston and placed on the swash plate, enabling compact pump design even at high volume flows. This relocation allows the pump to maintain acceptable dimensions while supporting high productivity applications, as the sensor can scan the swash plate without requiring extended piston travel.
Data Source
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AI summary
The invention relates to a pump (1), particularly an axial piston pump. The pump is provided with an incline-adjustable swash plate (4) and at least one scanning system (22) for determining this incline (8). The scanning system (22) comprises at least one sensor (24) and at least one scanning surface (23) arranged such that it can be scanned by the sensor (24) and moved with the swash plate (4). According to the invention, the at least one scanning surface (23) is located on the swash plate (4) so as to allow compact structures even for large conveyor volumes and simultaneously determine the angle of inclination with precision. Said at least one scanning surface (23) can, in particular, be part of at least one separate sensing element (33) which can be arranged such that it can be detached repeatedly, preferably in one receiving portion (37) of the swash plate (4).