Control Valve Segmented Seat for High-Pressure Particle Resistance
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Solution Overview
Problem
Existing control valves for injection systems are sensitive to particles and prone to leaks under increasing injection pressures, requiring a design that balances pressure and tightness while resisting high pressures over 2000 bar.
Innovation Solution
A control valve design featuring a valve-closing element with a seat element and a pin-shaped pressure compensation element, allowing for separate assembly and a sealing edge with a circular diameter larger than the support area, protected by a radially projecting support area, ensuring reduced sensitivity to particles and high-pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seat area is reduced to improve tightness under high pressure, then the valve becomes more sensitive to particles
Solution Approach 1:
The valve closing element is divided into two separate components: a seat element with the sealing edge and a pressure compensation element. This segmentation allows the seat element to have a larger diameter sealing edge for particle resistance while the pressure compensation element manages the pressure balance, resolving the contradiction between tightness and particle sensitivity.
Solution Approach 2:
The pressure compensation element acts as an intermediary component that compensates for pressure forces acting on the seat element. This allows the seat element to maintain a larger sealing surface area without compromising valve closure force, thereby reducing particle sensitivity while maintaining tightness.
2Object-affected harmful factors
If a support area protrudes radially into the high-pressure area to protect the sealing edge, then pressure balance is disrupted
Solution Approach 1:
The pressure compensation element is designed to counterbalance the pressure forces that would otherwise be disrupted by the radially protruding support area. By providing opposing pressure forces, it compensates for the pressure imbalance caused by the support area extension, allowing the sealing edge to be protected without sacrificing pressure balance.
3Ease of manufacture
If the valve closing element is designed as a single integrated component, then manufacturing is simpler, but assembly and maintenance become more difficult
Solution Approach 1:
The valve closing element is segmented into a seat element and a pressure compensation element that can be assembled separately. The seat element can be installed first, followed by the pressure compensation element, allowing for easier assembly, maintenance, and replacement of individual components without requiring complete disassembly of an integrated structure.
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to a control valve for indirectly controlling an injection valve member of an injection valve, which injection valve member can carry out a stroke movement and the stroke movement of which can release or close an injection port, the control valve comprising a valve closing element (2) which interacts with a valve seat (1) and can carry out a stroke movement and an actuator (3) for actuating the valve closing element (2). The valve closing element is designed as a ready-made element and comprises a seat element (4) which sealingly interacts with the valve seat (1) and a pin-type pressure equalization element (6) guided in a guide bore (5), the seat element (4) and the pressure equalization element (6) being interconnected in a non-positive, material and/or positive fit and delimiting a high-pressure-side valve chamber (7) in the axial direction.