Delivery Unit Drive Shaft Inlet Outlet Integration
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Solution Overview
Problem
Existing conveyor units, such as pumps and compressors, face inefficiencies due to the need for control valves which introduce internal leaks and reduce volumetric efficiency, increasing costs and failure risks.
Innovation Solution
The inlet and outlet are strategically placed within the inclined sliding plane, eliminating the need for control valves by positioning the inlet in one section and the outlet in another, allowing for a specific pressure-force balance through surface shaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control valves are used to control fluid flow in the working spaces, then the fluid direction can be controlled, but internal leaks increase and volumetric efficiency decreases
Solution Approach 1:
The patent removes control valves from the system entirely by integrating the inlet and outlet directly into the drive shaft structure. The inlet is positioned in a channel of the drive shaft while the outlet is positioned on the shoulder, allowing fluid to enter and exit working spaces without requiring separate control valve components that cause internal leaks.
Solution Approach 2:
The drive shaft itself performs the function of controlling fluid flow into and out of the working spaces. By shaping the surfaces of the inlet and outlet on the slip plane, the system achieves self-regulation of pressure levels and fluid direction without external control valves, eliminating the source of internal leaks while maintaining operational control.
2Ease of operation
If control valves are installed to manage fluid flow, then fluid direction control is achieved, but device complexity and failure risk increase
Solution Approach 1:
The patent merges the functions of the drive shaft with the fluid control function. The inlet and outlet are integrated directly into the drive shaft structure rather than being separate components. This consolidation eliminates the need for additional control valves, reducing device complexity and the number of potential failure points while maintaining the ability to control fluid direction through the positioning and shaping of the inlet and outlet on the drive shaft.
3Ease of operation
If control valves are added to the system, then fluid flow control is improved, but manufacturing costs increase
Solution Approach 1:
The patent eliminates control valves from the system by integrating fluid inlet and outlet functions directly into the drive shaft. This removal of unnecessary components reduces part count, simplifies manufacturing, and lowers costs while maintaining effective fluid flow control through the strategic positioning and surface shaping of the inlet and outlet on the drive shaft.
4Stress or pressure
If inlet and outlet are placed in the inclined sliding plane with different sections, then pressure-force balance is achieved, but structural complexity increases
Solution Approach 1:
The patent applies different functional characteristics to different sections of the inclined sliding plane. The inlet is positioned in one section while the outlet is positioned in another section, with each position optimized for its specific function. By shaping the surfaces of the inlet and outlet on the slip plane, local pressure conditions are optimized to achieve overall pressure-force balance in the pump, with each location having tailored characteristics for its role.
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 enhances volumetric efficiency by eliminating internal leaks and reducing costs associated with control valves, while maintaining fluid flow in both directions.
Implementation Method 1
The drive shaft 2 has an inclined sliding plane 5 which interacts with the rotor 3 and which is formed on a shoulder 6 of the drive shaft 2 and allows the rotor 3 to wobble with its rotor axis 7 about the drive axis 8 of the drive shaft 2
Data Source
Figure 1
Figure 2
AI summary
A delivery unit is already known, which comprises a drive shaft and a rotor driven by the drive shaft. The rotor is rotatably arranged in a stator housing, wherein the rotor has a toothing on the end face of said rotor that is remote from the drive shaft, wherein said toothing meshes with a toothing constructed on the stator housing. The drive shaft comprises an oblique sliding plane interacting with the rotor and which is constructed on a shoulder of the drive shaft and allows the rotor to gyrate with the rotor axis thereof about the drive axis of the drive shaft. Work spaces are formed between the toothing of the rotor and the toothing of the stator housing, wherein said work spaces can be filled via an inlet and emptied via an outlet. In one embodiment the fluid is admitted axially and discharged radially, and in the other embodiment the fluid is admitted and discharged axially. For that purpose, control valves in the form of non-return valves are required. The non-return valves cause additional internal leakages, resulting in a reduction in the volumetric efficiency of the pump. The valves are additional parts, which are associated with additional costs and an increased risk of failure. In the delivery unit according to the invention the control valves can be dispensed with. According to the invention the inlet (15) is provided in a channel (20) of the drive shaft (2) and the outlet (16) is provided at the shoulder (6) of the drive shaft (2).