Hydrostatic Rotary Brake Layout for Compact Passive Braking
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Solution Overview
Problem
Existing hydrostatic rotary machines face challenges in optimizing braking performance and compactness, with a need for improved weight, bulk, and cost reduction.
Innovation Solution
The rotary hydrostatic machine incorporates a brake counter-disc mounted on the distribution hub, a passive-braking piston activated by an elastic element, and a hydraulic brake-release chamber, which enables efficient braking with reduced components and improved compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional braking components are used in hydrostatic rotary machines, then braking function is achieved, but weight and bulk increase
Solution Approach 1:
The brake counter-disc is integrated with the distribution hub, merging two previously separate components into one unified structure. This integration eliminates the need for additional mounting hardware and reduces overall component count, directly addressing the weight and bulk reduction goal while maintaining braking functionality through the combined structural design
Solution Approach 2:
The brake counter-disc serves multiple functions: it acts as both a braking surface and a structural support element for the distribution hub. This multi-functionality allows the same component to fulfill both braking operations and mechanical support roles, reducing the need for separate components and thereby reducing overall weight and bulk
2Device complexity
If traditional braking components are used in hydrostatic rotary machines, then braking function is achieved, but device complexity increases
Solution Approach 1:
The brake counter-disc is integrated with the distribution hub, merging two previously separate components into one unified structure. This integration eliminates the need for additional mounting hardware and reduces overall component count, directly addressing the device complexity reduction goal while maintaining braking functionality through the combined structural design
Solution Approach 2:
The brake counter-disc serves multiple functions: it acts as both a braking surface and a structural support element for the distribution hub. This multi-functionality allows the same component to fulfill both braking operations and mechanical support roles, reducing the need for separate components and thereby reducing overall device complexity
3Object-generated harmful factors
If brake discs of large diameter are used, then braking performance improves and noise reduces, but bulk increases
Solution Approach 1:
The brake counter-disc is nested within the existing structure of the distribution hub, utilizing the internal space and structural framework already present in the hydrostatic machine. This nesting approach allows the brake disc to be positioned without requiring additional external space, thereby reducing bulk while maintaining the large diameter needed for noise reduction and improved braking performance
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 achieves optimized braking performance with fewer components, reduces the machine's weight and bulk, and lowers production costs while maintaining effective braking functionality.
Implementation Method 1
a passive-braking piston designed to activate said brake under the effect of an elastic element
Implementation Method 2
a hydraulic distributor mounted on the distribution hub and designed to connect the cylinders selectively to a hydraulic circuit
Data Source
AI summary
A hydrostatic rotary machine includes (i) an inner element and an outer element which are coaxial and mounted with the ability to rotate one with respect to the other about an axis of rotation, one of these elements being a rotor and the other of these elements being a stator, (ii) a brake counter-disc which is mounted on the distribution hub, which extends radially around the distribution hub, and which is rotationally coupled to the outer element, (iii) a passive-braking piston designed to activate a brake under the effect of an elastic element and which is mounted with axial mobility with respect to the brake counter-disc, and (iv) a hydraulic brake-release chamber positioned between the brake counter-disc and the passive-braking piston.