Snow Ejector Wheel Layout for High-Torque Material Discharge
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Solution Overview
Problem
Existing centrifugal ejectors in snow blowers and similar devices face limitations in ejection performance due to the inability to further reduce rotational speed and increase torque beyond a certain point, leading to inefficiencies in material discharge.
Innovation Solution
The apparatus design includes a conveying housing with a smaller diameter than the ejector wheel, positioned vertically offset below its axis, allowing the ejector wheel to accelerate material without resistance, and pivotable discharge levers to enhance circumferential speed, enabling reduced rotational speed and increased torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the rotational speed of the ejector wheel is reduced to increase torque, then the torque is improved, but the ejection performance deteriorates due to further reduction in revolutions
Solution Approach 1:
The discharge lever is made pivotable rather than fixed, allowing its angle relative to the ejector wheel radius to change dynamically during rotation. This enables the lever to maintain optimal ejection geometry while the wheel rotates at lower speeds, resolving the contradiction between torque and ejection performance
Solution Approach 2:
The invention changes the geometric parameter of the discharge lever by varying its pivot angle during operation. This parameter change allows the system to achieve better ejection performance at reduced rotational speeds, effectively decoupling the traditional relationship between speed and torque
2Productivity
If the discharge lever is pivotably fixed to increase circumferential speed, then the ejection performance is improved, but the device complexity increases
Solution Approach 1:
The pivotable discharge lever introduces dynamic adjustment capability with minimal additional components. The lever pivots on a simple axis and is actuated by the rotation itself, achieving enhanced ejection performance without complex control systems or additional actuators
Solution Approach 2:
The discharge lever's pivoting motion is self-generated through the interaction between the lever and the rotating ejector wheel. The system uses its own rotational motion to automatically adjust the lever angle, eliminating the need for external control mechanisms and reducing overall device complexity
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 design allows for a quadrupling of torque and improved ejection performance, facilitating the discharge of larger quantities of material with reduced power requirements.
Implementation Method 1
the ejector wheel, in which a material is accelerated in a circumferential direction and is subsequently ejected upwards
Implementation Method 2
Two screw conveyors 3, 4 arranged in the conveying housing 1... the conveying direction 6 in each case runs inwards
Data Source
AI summary
In an apparatus for conveying and discharging bulk material or snow, comprising at least one conveying device which has a tubular, circumferentially partially open conveying housing (1) and the conveying direction of which extends substantially in the direction of the tube axis (5), and comprising at least one centrifugal ejector, adjoining the at least one conveying device in the conveying direction and having at least one centrifugal wheel (8), which has at least one discharge lever (9), is arranged in a centrifugal-wheel housing (11) having a discharge opening (14) and can be driven to rotate about an axis of rotation (12), the conveying housing (1) has a smaller diameter than the ejector wheel (8) and the tube axis (5) is arranged parallel under the axis of rotation (12) of the ejector wheel (8), at a vertical normal distance.