Gear Pump Torque Transfer for Compact Adjustable-Pitch Propellers
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Solution Overview
Problem
Existing drive devices for adjustable-pitch propellers are complex, bulky, and heavy, requiring separate gear mechanisms to drive pressure-control devices, which increases structural complexity and weight.
Innovation Solution
A gear pump with intermeshing gearwheels connected to shafts that transmit torque to a pressure-control device, eliminating the need for a separate gear mechanism and reducing structural complexity and weight by integrating fluid conveyance and torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a separate gear mechanism is used to drive the pressure-control device, then the drive device can provide sufficient torque, but the structural complexity and weight increase
Solution Approach 1:
The patent combines the drive shaft and pressure-control device into a single integrated unit. The drive shaft directly drives the pressure-control device without requiring a separate gear mechanism, thereby reducing structural complexity while maintaining adequate torque transmission capability for the application.
Solution Approach 2:
The drive shaft serves multiple functions: it transmits torque from the drive unit, directly drives the pressure-control device, and eliminates the need for a separate gear mechanism. This multi-functionality reduces the overall number of components and simplifies the drive device structure.
2Power
If a separate gear mechanism is used to drive the pressure-control device, then the torque transmission is sufficient, but the installation space required increases
Solution Approach 1:
By merging the drive shaft and pressure-control device into one integrated unit, the patent eliminates the space required for separate gear mechanisms, thereby reducing the overall installation space while maintaining sufficient torque transmission capability.
3Power
If a separate gear mechanism is used to drive the pressure-control device, then the torque transmission is adequate, but the total weight of the drive device increases
Solution Approach 1:
The integration of the drive shaft and pressure-control device eliminates the weight of separate gear mechanisms while maintaining adequate torque transmission capability, thereby reducing the total weight of the drive device.
Solution Approach 2:
The patent extracts and eliminates the unnecessary gear mechanism from the drive system, retaining only the essential drive shaft and pressure-control device, thereby reducing weight while maintaining sufficient power transmission.
4Power
If a separate gear mechanism is used to drive the pressure-control device, then the torque transmission is sufficient, but the production cost increases
Solution Approach 1:
By combining the drive shaft and pressure-control device into a single integrated unit, the patent reduces the number of components that need to be manufactured and assembled, thereby lowering production costs while maintaining sufficient torque transmission capability.
Solution Approach 2:
The patent removes the unnecessary gear mechanism, reducing the number of parts that need to be manufactured, inventoried, and assembled, thereby simplifying production and reducing costs.
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
The solution results in a compact, lightweight, and economically viable drive device that simplifies the adjustment of propeller blade angles with reduced installation space requirements and lower production costs.
Implementation Method 1
gear pumps constitute machines for conveying fluids... two gearwheels, one of which is driven. Depending on the arrangement and type of gearwheels, we distinguish between external gear pumps... the medium to be conveyed is transported into the gaps between the teeth and the housing
Implementation Method 2
The gearwheels are each rotationally fixedly connected to a shaft... one of the shafts can be brought into active connection with a drive unit and the other of the shafts can be brought into active connection with a pressure-control device... the intermeshing gearwheels of the gear pump transmit the drive moment of the gear pump
Data Source
AI summary
A gear pump is described with at least two intermeshing gearwheels which are each rotationally fixedly connected to a shaft and separate a suction side from a delivery side. The shafts are mounted in a housing. One of the shafts can be brought into active connection with a drive unit and the other of the shafts can be brought into active connection with a pressure-control device which is to be driven by the drive unit via the two shafts. Furthermore, a drive device with the gear pump is proposed for setting an angle of attack of propeller blades of an adjustable-pitch propeller. In addition, an adjustable-pitch propeller having the drive device is described.