Multi-way Valve Adjustable Axial Clearance Thermal Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-way valves used in high-temperature and high-pressure oil exploitation environments face issues with rotary valve core expansion leading to stuck or jammed rotation and oil leaks, due to inadequate axial clearance and inconsistent thermal expansion.
Innovation Solution
A multi-way valve design featuring an adjustable axial clearance through a rotating adjusting nut, radial positioning using shaft sleeves, and a sealing system with a sealing filler and collar to prevent leaks, ensuring flexible rotation and reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotary valve core is installed with rolling bearings at a certain axial clearance to compensate for thermal expansion, then the rotation smoothness is improved for small elongation, but the rotation becomes stuck or jammed when the rotary valve core has relatively large elongation in high temperature environment
Solution Approach 1:
The patent transforms the static axial clearance into a dynamic adjustable clearance. The adjusting nut allows the axial clearance to be dynamically modified based on the actual thermal expansion of the rotary valve core, enabling the system to adapt to varying temperature conditions and prevent sticking while maintaining rotation smoothness
Solution Approach 2:
The patent changes the parameter of axial clearance from a fixed value to an adjustable value. By providing an adjusting nut that can modify the axial clearance, the system can optimize the clearance parameter according to different operating temperatures, ensuring reliable rotation without sticking
2Reliability
If the axial clearance is reduced to prevent sticking, then the rotation reliability is improved, but the rotary valve core becomes more prone to sticking due to thermal expansion in high temperature environment
Solution Approach 1:
The adjusting nut enables dynamic adjustment of axial clearance, allowing the system to maintain optimal clearance under different thermal conditions. This dynamic adjustment prevents both excessive clearance causing instability and insufficient clearance causing sticking
Solution Approach 2:
The adjusting nut allows preliminary adjustment of axial clearance before operation. The clearance can be pre-set according to expected operating temperatures, preventing sticking issues before they occur during high-temperature operation
3Reliability
If the rotary valve core is radially positioned to prevent adhesion and sticking, then the rotation reliability is improved, but the device complexity increases due to additional positioning structures
Solution Approach 1:
The patent introduces shaft sleeves as intermediary components between the rotary valve core and the valve body. These shaft sleeves provide radial positioning and support, preventing adhesion and sticking while maintaining a relatively simple overall structure. The shaft sleeves act as mediators that facilitate reliable rotation without requiring complex positioning mechanisms
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 allows for flexible rotation of the rotary valve core across varying temperatures and pressures, preventing sticking and oil leaks, with a maintenance-free sealing system that maintains performance over time.
Implementation Method 1
an adjusting nut, which is located below the rotary valve core, is provided in the lower mounting hole, and the adjusting nut is threadedly connected to the hole-wall of the lower mounting hole; the rotary valve core is moved up and down by adjusting the adjusting nut
Implementation Method 2
At high temperatures, the rotary valve core will expand so that the diameter and length of the rotary valve core are greatly increased, especially that the length of the rotary valve core is increased more obviously
Data Source
AI summary
A multi-way valve includes an upper valve body, a lower valve body and a rotary valve core. The upper valve body and the lower valve body are provided respectively with an upper mounting hole and a lower mounting hole. The rotary valve core is provided passing through the upper mounting hole and the lower mounting hole, respectively. The rotary valve core is formed with a first stepped surface facing toward the upper valve body, and an adjusting nut, which is located below the rotary valve core, is provided in the lower mounting hole. The rotary valve core is moved up and down axially by adjusting the adjusting nut such that an axial clearance between the first stepped surface and the upper valve body is adjusted, so the rotary valve core may flexibly rotate at different temperatures to prevent the multi-way valve from being stuck.