Fluid Motor Axial Brake Pressure Release Mechanism
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Solution Overview
Problem
Existing fluid pressure medium motors, such as vane motors, face challenges in achieving a robust braking mechanism that can effectively stop the rotor without external components and maintain a compact design while ensuring automatic release of the brake during operation.
Innovation Solution
A motor design featuring a spring-loaded braking element that forms a friction pair with the rotor, accompanied by a pressure chamber with a larger cross-sectional extent than the engine compartment, allowing the pressure medium to separate the friction pair and release the brake, thus providing high braking forces and automatic brake release without additional complexity or moving parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate braking device is provided outside the motor compartment, then the braking function is achieved, but the device complexity and space requirements increase
Solution Approach 1:
The braking device is merged with the motor compartment by integrating the friction pairing directly into the engine compartment. The rotor forms a friction pairing on its end face with a braking element that is axially displaceable and loaded by springs arranged axially directly next to the vane rotor, eliminating the need for separate external braking components
Solution Approach 2:
The rotor serves multiple functions: it acts as both the driving element of the motor and the friction pairing surface for braking. By forming a friction pairing on the rotor's end face, the rotor itself becomes part of the braking mechanism, reducing the need for additional dedicated braking components
2Force
If spring tension is used to press the braking element against the rotor, then braking force is generated, but the brake cannot be released during operation without additional mechanisms
Solution Approach 1:
The braking element is designed to be automatically released by the pressure medium during motor operation. The friction pairing is arranged in the engine compartment so that the compressed air acting there during operation acts on the braking element and displaces it against the spring action, causing the brake to be released without requiring additional release mechanisms
Solution Approach 2:
The pressure medium (compressed air) used to drive the motor is utilized to release the brake. The compressed air acts on the braking element through the friction pairing arrangement, displacing it axially against the spring force and automatically releasing the brake during operation
3Extent of automation
If the friction pairing is arranged in the engine compartment, then automatic brake release is achieved, but the cross-sectional area required increases
Solution Approach 1:
The braking element is designed to be axially displaceable rather than radially expanding. The friction pairing allows axial movement of the braking element against the rotor end face, utilizing the axial dimension for brake release instead of requiring additional radial or lateral space
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
The design achieves large braking forces and automatic brake release using the pressure medium, maintaining a compact and inexpensive motor construction with no additional moving parts, ensuring reliable operation and efficient energy use.
Implementation Method 1
The pressure medium introduced into these gaps expands and thus drives the rotor
Implementation Method 2
a spring-loaded braking element for braking the rotor forms a friction pair with its end face
Implementation Method 3
a spring-loaded braking element for braking the rotor forms a friction pair with its end face
Data Source
Figure 1
Figure 2~3
Figure 4a~4b
AI summary
The invention relates to a motor having an inner motor compartment (18). A rotatable rotor (20) can be driven by applying a pressure medium to it, wherein the pressure medium expands in a working region (40) of the motor compartment (18). A brake element (22) for braking the rotor (20) is disposed axially adjacent thereto. The brake element (22) and the rotor (20) are axially displaceable in relation to one another and form a spring-loaded friction pair (48, 50). In order to be able to achieve a higher braking effect due to stronger springs (52), a pressure chamber (60) is provided, the extension of which in the cross-section thereof is larger than the cross-sectional extension of the motor compartment (18) in the working region (40). The pressure chamber (60) is delimited axially at least on one side by the brake element (22). A pressure in the pressure chamber (60), and optionally between the brake element (22) and the adjacent face of the rotor (20), brings about a force for separating the friction pair (48, 50) counter to the spring force. The pressure chamber (60) is disposed such that the pressure medium reaches the pressure chamber (60) when it is applied to the motor (20).