Modular Valve Actuator Driving Arm Insert Design
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Solution Overview
Problem
Conventional valve actuator devices have fixed dimensions and torque profiles, making them inflexible for different applications requiring varying driving torques and stress levels, limiting their adaptability and increasing production costs and maintenance complexity.
Innovation Solution
A modular valve actuator design where the slot of the driving arm is formed in a separate insert, allowing for easy selection and replacement of different inserts to customize the torque profile and material properties according to specific application requirements, without altering the overall device dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the actuator device uses a fixed slot design in the driving arm, then the device structure is simple and manufacturing is easy, but the device cannot be adapted to different applications requiring varying torque profiles
Solution Approach 1:
The slot is segmented from the driving arm body by providing it as a separate insert component. This insert can be independently designed with different slot profiles and materials, then assembled into the driving arm. This segmentation allows customization of torque profiles for different applications without redesigning the entire driving arm, thus improving adaptability while maintaining structural simplicity.
Solution Approach 2:
The driving arm is designed with a universal interface that can accommodate multiple types of inserts with different slot profiles. A single driving arm body can serve multiple functions by accepting different inserts, allowing the actuator to be adapted to various torque requirements without manufacturing multiple specialized driving arms, thereby improving versatility while controlling complexity.
2Reliability
If the actuator device is designed with custom torque profiles for each application, then the device performance is optimized, but production costs increase and maintenance becomes more complex
Solution Approach 1:
By segmenting the slot into a separate insert, only this specific component needs to be customized for different torque profiles rather than the entire driving arm. This reduces manufacturing complexity and costs, as the insert can be produced independently using standardized processes while maintaining optimized performance for specific applications.
Solution Approach 2:
The insert design allows for parameter changes in the slot profile (such as curvature, width, depth) to optimize torque characteristics for different applications. By varying these geometric parameters in the insert while keeping the base structure standardized, the device achieves application-specific performance optimization without proportionally increasing production complexity or costs.
3Reliability
If the entire driving arm is replaced when the slot wears out, then the device maintains reliability, but maintenance time and costs increase
Solution Approach 1:
The slot is provided as a separate wear-prone insert that can be independently removed and replaced. When the slot wears out, only this small insert component needs to be replaced rather than the entire driving arm assembly. This significantly reduces maintenance time and costs while maintaining device reliability, as the critical wear surface can be quickly swapped without affecting other functional components.
Solution Approach 2:
The insert is designed as a replaceable component that can be discarded when worn and replaced with a new or refurbished insert. This approach allows the main driving arm structure to be recovered and reused multiple times, reducing overall maintenance costs and improving ease of repair while ensuring the device maintains reliability through consistent replacement of the wear-critical slot component.
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
Enables quick adaptation to diverse applications with customizable torque profiles, reduces production costs, simplifies maintenance by allowing replacement of worn parts, and facilitates standardization of production.
Implementation Method 1
a fluid cylinder for controlling rotation of said driving shaft, including: a cylinder body, which is connected to said supporting body
Implementation Method 2
a rod connected to the piston and carrying a cam-follower member; the valve actuator further comprising: at least one driving arm, which is connected to said driving shaft and has a body and a cam track in form of a slot, cooperating with said cam-follower member
Implementation Method 3
a helical spring contained in said casing and tending to recall the driving arm towards said safety position
Data Source
AI summary
A valve actuator device includes a supporting body, a driving shaft, and a fluid cylinder having a body connected to one side of the supporting body. The cylinder has a rod that controls rotation of a driving arm rigidly connected to the driving shaft. Linear movement of the rod is converted into rotation of the driving arm by engagement of a cam-follower pin carried by the rod within a slot formed in the driving arm. The slot is formed in an insert that constitutes an element separate from the driving arm body and that is received and held within a seat of the driving arm body. Thus, a single main body for the driving arm is provided, having a plurality of inserts for selective mounting within the seat and are differentiated from one another in the dimensions and shape of the slot and/or in the material of the insert.