Oil Bushing Ring Inductive Coupling for Planetary Carrier Sensors
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Solution Overview
Problem
The energy supply to sensors in planetary plain bearings of wind turbines is challenging due to the inaccessibility and high service life requirements, with existing energy-harvesting approaches being inefficient and costly, and traditional energy transmission methods like slip rings and inductive couplers failing to provide continuous energy, especially during 'pendling' operating modes.
Innovation Solution
An arrangement that integrates a contactless energy transmission system within an oil passage ring, where a transmitter, typically an electrical coil or permanent magnet, is fixed to the housing and a receiver, also an electrical coil or magnet, is embedded in the oil passage ring, allowing for reliable energy and data transmission between the housing and planetary carrier, ensuring continuous power supply independent of operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If slip rings are used for energy transmission between rotating components, then energy can be transmitted continuously, but the service life is insufficient for 20-year requirements
Solution Approach 1:
The patent replaces the mechanical contact-based slip ring system with a contactless inductive coupling system using magnetic fields. The transmitter coil on the stationary side and receiver coil on the rotating planetary carrier enable energy transmission without physical contact, eliminating wear and extending service life to meet 20-year requirements while maintaining continuous energy supply during pendulum operations
2Reliability
If inductive couplers in ring-shaped design are used, then continuous energy transmission is possible, but they are not available with required dimensions
Solution Approach 1:
The patent segments the inductive coupling system into two separate components: a transmitter coil mounted on the stationary housing and a receiver coil integrated into the rotating planetary carrier. This segmentation allows each coil to be optimized for its specific location and function, with the receiver coil being a compact solenoid type that fits within the planetary carrier's dimensional constraints while maintaining effective magnetic coupling
3Ease of manufacture
If rod-shaped inductive couplers are used, then manufacturing is simpler, but energy is not transferred continuously during pendulum operation
Solution Approach 1:
The patent transitions from a rod-shaped inductive coupler configuration to a planar coil configuration where the magnetic field is generated in a different spatial dimension. The transmitter and receiver coils are arranged with their planes parallel to each other, creating a magnetic field that extends across the air gap between the stationary housing and rotating planetary carrier, enabling continuous energy transfer during pendulum operations
4Ease of operation
If U-shaped oil guide ring is used, then oil transfer between components is achieved, but oil collects in cavity and cannot drain when planetary carrier is horizontal
Solution Approach 1:
The patent modifies the oil guide ring geometry by introducing a downward slope or curved drainage path that guides oil away from the cavity region. The oil passage is designed with a gradient that utilizes gravity to drain oil continuously, preventing accumulation even when the planetary carrier operates in horizontal position, thereby eliminating the harmful effect of oil pooling
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 solution provides a permanent and reliable energy supply to sensors, ensuring continuous operation over the 20-year service life, even in 'commuting' states, by leveraging the proximity and rotational symmetry of the oil passage ring to facilitate efficient energy and data transmission.
Implementation Method 1
a first means for contactless energy transmission, hereinafter referred to as the transmitter; and a second means for contactless energy transmission, hereinafter referred to as the receiver. The transmitter is thus configured to transmit energy to the receiver without contact.
Data Source
Figure 1~2
AI summary
The invention relates to an arrangement having a structure (101) fixed to the housing, a planetary carrier (103) mounted rotatably in the structure (101) fixed to the housing, an oil bushing ring (105), a first means (119, 201) and a second means (117) for contactless power transmission; wherein the oil bushing ring (105) forms a lubricant-conducting joint between the structure (101) fixed to the housing and the planetary carrier (103). The structure (101) fixed to the housing has the first means (119, 201) and the oil bushing ring (105) has the second means (117).