Pressure Regulator Valve Seat Sliding With PTFE Buffer
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Solution Overview
Problem
Conventional regulators experience functional loss due to leakage failures between the valve-seated seat and pressure regulating valve body, primarily caused by increased holding load and dimensional accuracy requirements, leading to increased costs.
Innovation Solution
A regulator design that utilizes a buffer made of PTFE for excellent sliding performance and a compression coil spring to balance loads, ensuring uniform contact and stable operation between the valve-seated seat and pressure regulating valve body, thereby preventing sliding mechanism loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a buffer made of polymer material is provided between the fuel inlet cover and the valve-seated seat holding member to enable sliding, then the valve seat can slide in the direction orthogonal to the axis, but the holding load increases due to the crushing load on the buffer
Solution Approach 1:
The patent changes the material parameter of the buffer from generic polymer material to specifically PTFE (polytetrafluoroethylene), which has superior friction and wear properties. This material substitution reduces the coefficient of friction between sliding surfaces, thereby maintaining sliding capability while significantly reducing the holding load required to compress the buffer.
2Reliability
If the valve seat is designed to slide to stabilize seating, then uniform contact between valve-seated seat and pressure regulating valve body is achieved, but dimensional accuracy of peripheral parts must be strictly managed, leading to increased costs
Solution Approach 1:
The patent introduces a dynamic sliding mechanism for the valve seat that allows automatic adjustment and alignment during operation. The valve seat can slide orthogonally to the axis to accommodate dimensional variations in peripheral parts, transforming a static precision-dependent connection into a dynamic self-adjusting connection. This eliminates the need for strict dimensional control while maintaining reliable uniform contact.
3Stability of the object's composition
If the buffer is compressed to hold the valve seat, then the valve seat can be positioned, but the sliding mechanism is lost due to increased holding load
Solution Approach 1:
By specifying PTFE as the buffer material, the patent fundamentally changes the friction parameter of the system. PTFE's extremely low coefficient of friction allows the buffer to maintain positioning stability through minimal compression force, preserving the sliding mechanism's mobility. The material parameter change enables both positioning stability and sliding capability to coexist without the trade-off present in conventional polymer materials.
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 functional losses from leakage failures and reduces the need for precise dimensional management, enhancing the regulator's reliability and reducing operational costs.
Implementation Method 1
a pressure regulating spring 8 arranged on the side opposite to the fuel outlet 24 of the piston unit 6 in an atmosphere chamber 61, provided coaxially in parallel with the pressure regulating chamber 4 around the piston unit 6, so as to be balanced with a pressure load received by the piston unit 6
Implementation Method 2
a buffer made of PTFE for excellent sliding performance
Data Source
AI summary
A regulator may include an inlet from which a high-pressure fluid is introduced, a valve seat provided at the inlet, and a pressure regulating valve body. The fluid may pass an opening between the valve seat and the valve body formed with a communication passage to a pressure regulating chamber. A load generated by pressure of pressure-regulated fluid acting on a piston unit joined to the valve body may be balanced with a load by a pressure regulating spring in an atmosphere chamber provided coaxially in parallel with the pressure regulating chamber on an opposite side of the piston unit. Fluid pressure of the pressure regulating chamber may be controlled by changing an opening area between a valve-seated seat and the valve body. The valve seat holding the valve-seated seat may be installed on an elastic member via a buffer having a sliding performance.