Electric Valve Output Shaft Limiting Structure for Friction Loss
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Solution Overview
Problem
Existing electric valves experience increased friction loss and reduced service life due to high-pressure fluid causing squeezing and rotational friction in the transmission mechanism.
Innovation Solution
Incorporating a limiting bracket and connecting seat arrangement that allows for pressure transfer to the valve body assembly, reducing the pressure exerted on the transmission mechanism and minimizing friction loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high-pressure fluid acts on the shaft portion, then the pressure is transmitted to the transmission mechanism, but the transmission mechanism is squeezed under force and rotational friction increases
Solution Approach 1:
The limiting bracket serves as an intermediary component between the shaft portion and the transmission mechanism. When high-pressure fluid acts on the shaft portion, the limiting bracket transfers part of this pressure to the connecting seat, preventing direct transmission of full pressure to the transmission mechanism, thereby reducing friction loss while maintaining necessary pressure transmission for valve operation
Solution Approach 2:
The harmful pressure component is extracted from the transmission mechanism by introducing the limiting bracket and connecting seat structure. The limiting bracket isolates the transmission mechanism from direct high-pressure fluid action, separating the pressure reception function from the rotation transmission function, thus protecting the transmission mechanism from excessive friction
2Stress or pressure
If the transmission mechanism is squeezed under high pressure, then pressure control is achieved, but the service life of the electric valve decreases
Solution Approach 1:
The limiting bracket acts as a protective intermediary that distributes and transfers pressure away from the transmission mechanism to the connecting seat and valve body assembly. This intermediary structure maintains pressure control capability while protecting the transmission mechanism from damaging squeeze forces, thereby extending service life
Solution Approach 2:
The limiting bracket provides beforehand cushioning by being positioned to receive and distribute high-pressure fluid forces before they can directly impact the transmission mechanism. This pre-protection structure cushions the transmission mechanism against pressure-induced damage, extending the valve's service life
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 solution effectively reduces friction loss and enhances the service life of the electric valve by offsetting fluid pressure through the limiting bracket and connecting seat configuration.
Implementation Method 1
When a fluid pressure is applied to the end surface of the output shaft, the limiting bracket fixedly connected to the output shaft, under the action of pressure, can be moved towards the end of the connecting seat by a set distance until the limiting bracket abuts against the end surface of the connecting seat. The limiting bracket can transfer a part of the pressure to the connecting seat.
Data Source
AI summary
An electric valve, includes a transmission mechanism, a valve core, and a valve body assembly. The valve body assembly is provided with a valve body cavity, the valve core is located in the valve body cavity, and the transmission mechanism is transmissionally connected to the valve core. The electric valve further comprises a connecting seat, which is fixedly connected to the valve body assembly, and the transmission mechanism comprises an output shaft; the electric valve further comprises a limiting frame, which is located on the radial outer circumference of the output shaft and is fixedly connected to the output shaft, the limiting frame being located on a side of the connecting seat relatively close to the valve core, and the limiting frame and the connecting seat being arranged opposite to each other and having a preset gap.