Rotary Table Pressure Regulation for Check Valve Malfunction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary table devices experience malfunction of check valves and penetration of cutting fluids due to the deterioration of synthetic resin sealing materials, leading to moisture ingress and electrical hazards, as existing pressure regulation systems cause the check valve to remain open, leading to air leakage and pressure imbalance.
Innovation Solution
A rotary table device with a pressure regulating unit that maintains a pressure differential between two spaces within the case, using a check valve and air supply paths to ensure the pressure inside the case remains higher than outside, and reverses this differential periodically to prevent fluid penetration and check valve malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the check valve remains open for long periods, then air flow maintains pressure differential, but the O-ring becomes fixedly attached to the sliding portion causing valve failure
Solution Approach 1:
The air supply is periodically interrupted to allow the check valve to return to its closed position. During these intervals, the O-ring detaches from the sliding portion, preventing fixed attachment and deterioration. The periodic reopening of the valve maintains the pressure differential over time while preventing mechanical failure.
2Productivity
If water-soluble cutting fluid is sprayed in large amounts, then chip removal is effective, but the cutting fluid penetrates seals and causes rust on electric components
Solution Approach 1:
The system uses pneumatic pressure control to maintain a positive pressure environment inside the case. By controlling air supply and utilizing the check valve mechanism, the system creates a pressure barrier that prevents water-soluble cutting fluid from penetrating seals and reaching electric components, while allowing aggressive chip removal externally.
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 prevents the penetration of cutting fluids and maintains the integrity of the check valve, preventing electrical hazards and ensuring the longevity of the device by regulating pressures and preventing the O-ring from becoming fixedly attached to the sliding surface.
Implementation Method 1
a pressure regulating unit configured to constantly regulate a pressure of the first space and a pressure of the second space to a pressure higher than an outside pressure
Implementation Method 2
a check valve provided in the partitioning member... configured to discharge air only in one direction from the inside of a case of a rotary table to the atmosphere
Data Source
AI summary
The inside of a case of a rotary table device is divided into a first space and a second space. The pressure of the first space is regulated to a pressure higher than the pressure of the second space during a steady state. The relationship between the pressures is reversed at a certain timing, to make the pressure of the second space higher than the pressure of the first space. Such operation can forcibly close a check valve disposed between the first space and the second space on regular basis, thereby preventing a malfunction of the check valve.