Rotating Nozzle Fluid Diffuser Velocity Control
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Solution Overview
Problem
Rotating nozzle arrangements for high-pressure cleaning devices face challenges in initiating rotational movement and limiting rotational velocity to achieve optimal cleaning efficiency, as they require high fluid velocity to overcome friction and maintain a compact jet of cleaning fluid.
Innovation Solution
A rotating nozzle design featuring a nozzle house with a diffuser that causes fluid to rotate, initiating the nozzle member's rotation and limiting its velocity through strategically placed openings and protrusions on the nozzle member, which interact with the fluid to set a maximum rotational velocity between 2500 RPM to 3500 RPM, utilizing a stabiliser for inertia to maintain movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high fluid velocity is used to initiate rotation and overcome friction, then rotational movement is achieved, but the jet becomes dispersed and cleaning efficiency decreases
Solution Approach 1:
The patent applies preliminary anti-action by using a diffuser to pre-rotate the fluid before it reaches the nozzle member, creating a controlled rotational flow that initiates nozzle rotation at lower velocities. This pre-conditioning of the fluid flow prevents the need for high velocities that would cause jet dispersion, thereby maintaining cleaning efficiency while achieving the necessary rotational movement.
2Speed
If friction between nozzle member and nozzle house chamber is increased to limit rotational velocity, then maximum rotational velocity is controlled, but material selection becomes more restrictive
Solution Approach 1:
The patent introduces an intermediary element - the diffuser - that mediates between the fluid flow and the nozzle member. The diffuser creates a controlled rotational flow field that indirectly drives the nozzle member, allowing friction to be used for velocity control without requiring specific material combinations. This intermediary approach decouples the velocity control function from material selection constraints.
3Stability of the object's composition
If rotational velocity is limited to maintain compact jet, then jet coherence is improved, but initiation of rotation becomes more difficult
Solution Approach 1:
The patent applies preliminary action by using the diffuser to pre-rotate the fluid and create a controlled rotational flow pattern before the fluid reaches the nozzle member. This preliminary conditioning of the fluid allows the nozzle to initiate rotation at lower velocities while maintaining a compact, coherent jet, as the rotational momentum is already established in the fluid flow itself rather than requiring high-velocity impact to overcome friction.
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 effectively initiates and limits the rotational velocity of the nozzle member, ensuring a compact and efficient jet of cleaning fluid is maintained, enhancing cleaning efficiency while reducing material and friction coefficient specificity.
Implementation Method 1
a diffuser (5) sealed against the inner surface of the inlet chamber (4), wherein the diffuser (5) causes the fluid in the nozzle house chamber (7) to rotate about a longitudinal axis (X) of the nozzle house (2)
Implementation Method 2
The desired maximum rotational velocity of the nozzle member about its longitudinal axis is determined by the frictional force between the surface of the frusto-conical portion of the nozzle member and the corresponding portion of the inner wall of the nozzle house chamber
Implementation Method 3
a ball that due to the centrifugal force exerted on the ball during rotation of the nozzle member is urged against a contact surface provided at an adjacent longitudinal end of the nozzle house chamber
Data Source
Figure 1(a)
Figure 1(b)
Figure 2
AI summary
The present invention relates to a rotating nozzle for high-pressure cleaning devices comprising a nozzle house (2) provided with a fluid exit opening (15) comprising a seat (14) co-operating with a first end portion (13) of a nozzle member (8), such that the nozzle member (8) can undergo pivotal or rotational movement relative to a lon- gitudinal axis (X) through the nozzle house (2), the nozzle house (2) being provided with an inlet charnber(4), from which fluid flows through a diffuser (5) into a nozzle house chamber (7), in which said nozzle member (8) is provided, where the nozzle member (8) according to a specific embodiment of the invention, is furthermore provided with a second end portion (9) longitudinally opposite the first end portion (13) of the nozzle member (8), which second portion is provided with at least one opening (10) serving the dual purpose of initiating rotation of the nozzle member (8) and determining its maximum rotational velocity.