Radial Piston Machine Brake Ring Anti-Twist Design
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Solution Overview
Problem
Radial piston machines face challenges in preventing jamming and tilting of braking means during operation, particularly due to twisting and elastic deformations caused by braking forces, which can lead to instability and inefficiency.
Innovation Solution
The design incorporates a ring-like housing extension with a movable brake ring that engages positively with the housing, minimizing twisting and tilting risks through a dog clutch mechanism and hydraulic pressure, ensuring the brake ring remains aligned and securely engaged, even with large dimensional tolerances, and features a first rotary bearing mounted on the rotor's end face for close proximity to the braking engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking means are secured against twisting using traditional methods, then reliability is improved, but device complexity and manufacturing cost increase due to additional anti-twist mechanisms
Solution Approach 1:
The brake ring is designed to perform multiple functions simultaneously: it provides braking action through friction surfaces and prevents twisting through positive engagement contours integrated into its structure. This multi-functionality eliminates the need for separate anti-twist mechanisms, reducing device complexity while maintaining reliability.
Solution Approach 2:
The anti-twist function is merged with the braking function by integrating positive engagement contours directly into the brake ring structure. The brake ring's inner circumference features engagement contours that mate with corresponding contours on the ring-like extension, combining stabilization and braking in a single component.
2Reliability
If machining precision is increased to prevent twisting, then reliability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The positive engagement contours are designed to be self-aligning features that automatically compensate for casting tolerances. The geometric shape of the contours on the brake ring and ring-like extension create a self-correcting mechanism that prevents twisting without requiring high-precision machining, allowing the use of cost-effective casting processes.
3Ease of manufacture
If the brake ring is positioned away from the rotor end face, then ease of manufacture is improved, but the risk of tilting and jamming increases
Solution Approach 1:
The solution addresses the tilting risk by adding a radial dimension of control through positive engagement contours on the inner circumference of the brake ring. These contours engage with corresponding features on the ring-like extension, creating a geometric constraint that prevents radial tilting while allowing the brake ring to remain axially separated from the rotor end face for ease of assembly.
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 minimizes elastic deformations, reduces the risk of brake ring tilting, and allows for a compact design, ensuring reliable operation and effective engagement of the braking means without jamming, while maintaining low material usage and cost-effective production.
Implementation Method 1
the brake ring engages positively on the radially inner side thereof in the ring-like extension in such a way that twisting between the housing and the brake ring is at least limited
Implementation Method 2
a fluid distributing device is arranged in the housing, the said device being designed in such a way that each first fluid chamber can be fluidically connected selectively to the first or the second fluid connection by turning the rotor
Implementation Method 3
the brake ring is movable in the direction of the axis of rotation, wherein it has second braking means, which can be brought into braking engagement with the first braking means
Data Source
AI summary
A radial piston machine includes a housing, rotor, first braking member, and brake ring with a second braking member. The rotor is mounted in the housing to be rotatable relative to an axis of rotation, and has an end face facing in a direction of the axis of rotation. The first braking member is positioned on the end face. The housing has a body defining a ring-shaped extension relative to the axis of rotation. The brake ring is positioned to surround the extension and is configured to be movable in the direction of the axis of rotation so as to bring the second braking member into braking engagement with the first braking member. The brake ring is further configured to positively engage with an inner radial side of the extension to limit a twisting between the housing and brake ring.