Hydraulic Vane Machine Cam Disk Stator Design
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Solution Overview
Problem
Existing vane machines require a cylindrical inner stator circumference for even vanes with spacers, limiting design freedom and allowing only one working cycle per rotor revolution, and are not suitable for using an odd number of vanes or water as hydraulic fluid.
Innovation Solution
A hydraulic vane machine design with a cam disk on the rotor's outer circumference, allowing vanes to be guided with greater freedom, using changing diameters and enabling operation with water as hydraulic fluid, and featuring a recessed contact surface for axial sealing and reduced friction, allowing two working cycles per revolution without eccentric mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical inner stator circumference is used with even vanes and spacers, then the machine structure is simple and manufacturable, but the design freedom is limited and only one working cycle per rotor revolution is achieved
Solution Approach 1:
The invention transitions from a static cylindrical stator circumference to a dynamic cam-shaped stator circumference that varies in radius. This allows the stator to actively control vane movement patterns, enabling multiple working cycles per rotor revolution and supporting both even and odd vane configurations without requiring structural changes to the basic machine architecture.
Solution Approach 2:
The invention changes the geometric parameter of the stator circumference from a constant radius (cylindrical) to a variable radius (cam-shaped). This parameter variation allows flexible control of vane displacement patterns, enabling adaptation to different operating requirements while maintaining a simple overall machine structure that is easy to manufacture.
2Stability of the object's composition
If an even number of vanes with spacers is used, then the machine structure is simple and stable, but the versatility is limited and odd number of vanes cannot be used
Solution Approach 1:
The cam-shaped stator circumference serves multiple functions: it guides vane movement, controls working chamber volume changes, and accommodates both even and odd vane configurations through its variable radius profile. This universal guiding mechanism eliminates the need for different stator designs depending on the number of vanes, providing structural stability while enabling configuration flexibility.
3Adaptability or versatility
If water is used as hydraulic fluid, then the machine can operate as a water-hydraulic pump or motor, but friction and wear increase compared to oil-based fluids
Solution Approach 1:
The invention utilizes the hydraulic properties of water effectively by designing a system where water serves as the working fluid in the variable volume chambers. The cam-shaped stator and vane configuration creates sealed chambers that can efficiently transmit hydraulic force using water, enabling the machine to function as either a pump or motor depending on the direction of energy flow.
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 provides flexibility in stator circumference diameter, allows operation with an odd number of vanes and water, ensures effective sealing and reduced friction, and achieves two working cycles per rotor revolution, enhancing operational efficiency and versatility.
Implementation Method 1
The use of a cam disk, on the outer circumference of which the contact surfaces of the vanes rest, allows the vanes to be guided with relatively great freedom. The vanes are pressed radially outwards by the cam disc. The radially inward movement can be effected by the inner circumference of the stator.
Implementation Method 2
The vanes have a core made of steel and a coating made of plastic that interacts with steel with low friction.
Implementation Method 3
Such a machine can also be operated with water as the hydraulic fluid and then forms a water-hydraulic vane machine.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A hydraulic vane machine (1) is described, comprising a stator (2) and a rotor (3), which has several vanes (4) that are radially displaceable in a guide in the rotor (3), bear against an inner circumference (6) of the stator (2), and together with the rotor (3), the stator (2), and a side wall (7) at each axial end of the rotor (3), define working chambers whose volumes change when the rotor (3) rotates relative to the stator (2). A degree of flexibility in the design of the inner circumference is desired. For this purpose, each vane (4) is provided with a contact surface (17) on its radial inner side, which bears radially outward against a cam disk (15).