Fluid Switch-Over Device with Combined Axial and Rotary Movement
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Solution Overview
Problem
Conventional fluid switch-over devices face challenges in maintaining favorable flow characteristics and functional switch-over operations under applied fluid pressure, often resulting in pressure-dependent actuation forces and unfavorable flow conditions.
Innovation Solution
A fluid switch-over device with a switch-over body that is translationally and rotationally movable, featuring a fluid-tight inlet nozzle within the inlet channel for axial and rotational movement, which maintains a uniform through flow behavior and minimizes fluid pressure forces, allowing for switch-over operations independent of fluid pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the switch-over body is moved only in translation (conventional arrangement), then the structure is simpler, but the flow conditions become unfavorable leading to flow noises and flow resistances
Solution Approach 1:
The switch-over body is designed with combined axial and rotary movement capability, transforming from a static translation-only mechanism to a dynamic system that can rotate about its longitudinal axis. This dynamic movement allows the body to assume different angular positions relative to the outlet channels, optimizing flow paths and eliminating unfavorable flow conditions that cause noise and resistance
Solution Approach 2:
The invention adds a rotational dimension to the conventional translational movement. The switch-over body can now move in two degrees of freedom: axial translation and rotary movement about the longitudinal axis. This dimensional expansion enables the body to align its outlet in various angular positions with different outlet channels, creating favorable flow conditions while maintaining structural efficiency
2Device complexity
If the switch-over body is moved only in rotation (conventional arrangement), then the structure is simpler, but friction effects on sealing surfaces occur
Solution Approach 1:
The switch-over body is designed with combined axial and rotary movement capability, transforming from a static rotation-only mechanism to a dynamic system that can translate axially. This dynamic movement allows the body to lift off the valve seat surface during switching operations, eliminating continuous contact and the associated friction effects on sealing surfaces
Solution Approach 2:
The invention adds an axial translation dimension to the conventional rotational movement. The switch-over body can now move in two degrees of freedom: rotary movement about the longitudinal axis and axial translation. This dimensional expansion enables the body to separate from the valve seat surface, reducing friction and wear on sealing surfaces while maintaining effective fluid switching
3Stress or pressure
If conventional switch-over devices are used under applied fluid pressure, then they can handle pressurized fluid, but the actuation forces become pressure-dependent and operations become difficult
Solution Approach 1:
The switch-over body is designed with combined axial and rotary movement, allowing it to lift off the valve seat surface during switching operations. This dynamic separation reduces the contact area and pressure-dependent friction forces, making actuation easier even under high fluid pressure conditions
Solution Approach 2:
The invention adds axial translation capability to the rotational movement. This additional degree of freedom allows the switch-over body to move axially away from the valve seat, reducing the normal force between contacting surfaces. Consequently, the actuation forces become less dependent on fluid pressure, improving ease of operation under pressurized conditions
Data Source
AI summary
A fluid switch-over device of the type that may be used in sanitary shower devices, the fluid switch-over device including a housing body which includes a fluid inlet channel and a plurality of fluid outlet channels arranged fluidically in parallel, a switch-over body which includes a fluid inlet, at least one fluid outlet and a fluid duct from the fluid inlet to the fluid outlet and is disposed within the housing body to be translationally movable axially parallel and rotationally movable in a combined manner in relation to a longitudinal axis between at least two different operating positions. The switch-over body in each of the different operating positions is in fluid connection with the fluid inlet channel via its fluid inlet and differentially unblocks or blocks at least partially a fluid connection of its fluid outlet to the respective fluid outlet channel. An actuation unit for actuating the switch-over body includes an operating element disposed on the housing body to be user-operable.