Radial Piston Machine Multi-Disc Brake With Nested Brake Chamber
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Solution Overview
Problem
Existing radial piston machines require significant installation space and include expensive components, such as the Duo Cone Seal, and require a separate oil supply for the brake discs.
Innovation Solution
The brake disc package is arranged within the brake room, with the first and second ring sections limiting the brake room, allowing the disc section, spring, brake piston, and brake disc package to be arranged side by side, transmitting the spring force to the brake disc package, thereby reducing the need for installation space and expensive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the brake disc package is arranged around the pivot bearing as in prior art, then the machine requires installation space in the axial direction, but the patent achieves even less installation space by arranging the brake disc package within the brake chamber
Solution Approach 1:
The brake disc package is nested within the brake chamber, which itself is integrated into the drive shaft structure. The first and second ring sections form the brake chamber walls, creating a nested configuration where the brake components are housed within the existing structural envelope, eliminating the need for additional external space.
Solution Approach 2:
The brake disc package is arranged radially within the brake chamber rather than axially around the pivot bearing. This radial arrangement within the brake chamber allows the brake components to occupy space in the radial dimension while maintaining compact axial dimensions, effectively reducing the machine's axial installation space.
2Reliability
If expensive mechanical seals like Duo Cone Seal are used to seal the gap between the first ring section and housing, then sealing reliability is improved, but component cost increases significantly
Solution Approach 1:
The expensive mechanical seal (Duo Cone Seal) is completely removed from the design. Instead, a simple lip seal is used to seal the gap between the first ring section and the housing. This extraction of the complex sealing component eliminates the need for costly precision sealing mechanisms while maintaining adequate sealing function.
Solution Approach 2:
A simple lip seal is used in place of the expensive mechanical seal. The lip seal is a simpler, less expensive component that provides sufficient sealing for the application. While mechanical seals are designed for long service life, the lip seal adequately performs the sealing function at a fraction of the cost.
3Reliability
If a separate oil reservoir is provided for lubricating the brake discs, then lubrication reliability is improved, but device complexity and component count increase
Solution Approach 1:
The hydraulic oil serving the radial piston machine's hydraulic system is used simultaneously to lubricate the brake discs. The same fluid performs multiple functions: power transmission for the piston machine and lubrication for the brake components. This eliminates the need for a separate lubrication system and oil reservoir.
Solution Approach 2:
The hydraulic system and brake lubrication system are merged into a single system. The brake chamber is fluidically connected to the hydraulic system, allowing the same hydraulic oil to serve both the power transmission function and the brake lubrication function, thereby reducing component count and simplifying the overall system.
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 reduces the installation space required by the radial piston machine, decreases component costs by eliminating expensive seals and oil supply systems, and maintains effective operation of the multi-disc brake.
Implementation Method 1
The multi-disc brake is preloaded in the closed state by a disc spring
Implementation Method 2
By pressurizing a brake chamber defined by an annular brake piston
Data Source
Figure 1
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AI summary
A radial piston machine (10) comprising a multi-disc brake (57), the brake disc assembly (50) of which interacts with a first annular section (35) on the drive shaft (30) and a second annular section (25) on the housing (20). The brake disc assembly (50) is arranged within the brake chamber (58), wherein the first and the second annular sections (35; 25) each sectionally delimit the brake chamber (58), wherein the disc section (34), the spring (53), the brake piston (54) and the brake disc assembly (50) are arranged side by side in the specified order along the axis of rotation (13) such that a force from the spring (53) can be transmitted to the brake disc assembly (50).