Dehider Regulator Valve for High-Pressure Speed Control
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Solution Overview
Problem
High line pressures in handheld dehiders can overcome the speed governor's ability to control speed, leading to inconsistent operation and increased energy consumption.
Innovation Solution
An air pressure regulator is integrated with the dehider, featuring a valve and spring mechanism that reduces pressure up to a predetermined limit and shuts off air flow completely at higher pressures, working in conjunction with the speed governor to maintain optimal speed and torque control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a speed governor is used to control motor speed, then speed control is improved, but at high line pressures the governor cannot maintain speed control
Solution Approach 1:
An air pressure regulator is introduced as an intermediary device between the air source and the speed governor. The regulator includes a valve mechanism with a bias spring that reduces incoming air pressure to a predetermined level before it reaches the governor, ensuring the governor receives pressure within its effective control range regardless of line pressure variations.
Solution Approach 2:
The system changes the pressure parameter of the air supply by using the regulator to maintain air pressure at a predetermined level. This parameter change ensures that the speed governor operates within its optimal pressure range, preventing it from being overwhelmed by excessive line pressure while still receiving sufficient pressure for effective speed control.
2Power
If high line pressure is used to drive the pneumatic motor, then power output is improved, but speed control capability deteriorates
Solution Approach 1:
The air pressure regulator acts as an intermediary that decouples the high-power air supply from the speed-sensitive governor. It allows high line pressure to be maintained for power while simultaneously delivering controlled, reduced pressure to the governor for precise speed control.
Solution Approach 2:
The air supply system is segmented into two functional paths: one path maintains high pressure for motor power output, while another path (through the regulator) delivers reduced, controlled pressure to the speed governor. This segmentation allows both high power and precise speed control to coexist.
3Quantity of substance
If the regulator valve opens fully to allow air flow, then air flow is improved, but pressure control capability worsens
Solution Approach 1:
The regulator incorporates a feedback mechanism where air pressure acts on a valve mechanism to automatically modulate the valve opening. When pressure exceeds the predetermined level, the pressure itself closes the valve to reduce flow; when pressure is sufficient, the bias spring opens the valve to allow flow, maintaining equilibrium at the target pressure.
Solution Approach 2:
The pressure control system is self-regulating through the interaction between the bias spring and air pressure on the valve. The system uses its own operating parameters (air pressure and flow) to automatically control the valve position, eliminating the need for external control 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 regulator ensures smoother, precisely controlled speed and torque operation, reduces energy usage, and provides fail-safe operation by limiting air pressure, maintaining optimal performance and reducing vibration for operators.
Implementation Method 1
a bias spring urging the valve in the direction of air flow through the inlet to close the valve
Implementation Method 2
a piston connected to the valve on one side and exposed to flow of air through the air inlet
Implementation Method 3
a regulator spring disposed between the piston and the plunger
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
An air pressure regulator for a dehider includes a valve to open and close the flow of pressurized air in an air inlet, a first spring urging the valve in the direction of air flow through the inlet to close the valve, a plunger operable to move the valve from a closed to an open position against the direction of air flow, a piston connected to the valve exposed to the air flow, and a second spring between the piston and the plunger. Upon depressing the plunger, the second spring urges the piston to open the valve against the air flow direction to permit pressurized air to flow through the regulator. The maximum allowable air pressure through the regulator is determined by spring forces of the first and second springs and resistance of the piston to the flow of air through the valve.