Throttle Ring Radial Bore Groove Dynamic Pressure Sealing
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Solution Overview
Problem
Existing piston compressors face challenges with dynamic pressure components leading to excessive wear and early failure of sealing elements, particularly due to the inability of non-contact throttle rings to effectively seal dynamic pressure and protect sealing elements from foreign bodies and abrasion.
Innovation Solution
A throttle ring design featuring an axially running ring axle with radial holes and circumferential grooves, which creates a fluid connection between the radial inside and outside areas, effectively sealing dynamic pressure and preventing the transfer of abrasion or fragments into the compression space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional non-contact throttle rings are used, then friction and wear on the throttle ring itself are reduced, but the dynamic pressure component is not effectively sealed, leading to excessive wear on downstream sealing elements
Solution Approach 1:
The throttle ring incorporates a hybrid design where different regions have different contact characteristics: the upper flank with circumferential grooves provides frictionless sealing against dynamic pressure, while the lower flank with V-shaped groove maintains contact for stability. This local differentiation allows the ring to simultaneously protect downstream sealing elements and maintain structural integrity.
Solution Approach 2:
The throttle ring acts as an intermediary element positioned upstream of the sealing elements. It mediates the dynamic pressure component by sealing it in the upper region, preventing direct transmission to downstream sealing elements, while maintaining its own structural stability through the lower contact region.
2Object-generated harmful factors
If throttle rings are designed as frictionless sealing elements, then wear on the throttle ring is minimized, but they cannot effectively seal the dynamic pressure component
Solution Approach 1:
The upper flank features circumferential grooves that create a frictionless sealing interface for dynamic pressure, while the lower flank has a V-shaped groove that maintains contact for structural stability. This local differentiation allows simultaneous achievement of low wear and effective sealing.
Solution Approach 2:
The throttle ring is segmented into functionally distinct regions: the upper sealing region with circumferential grooves for frictionless dynamic pressure sealing, and the lower stability region with V-shaped groove for contact-based structural support. Each segment performs its specific function optimally.
3Reliability
If sealing elements are used to seal the compression chamber, then sealing effectiveness is improved, but dynamic pressure causes flow of sealing elements and excessive wear
Solution Approach 1:
The throttle ring serves as an upstream intermediary that seals the dynamic pressure component before it reaches the sealing elements. This protects the sealing elements from the harmful effects of dynamic pressure while maintaining the necessary sealing function in the compression chamber.
Solution Approach 2:
The throttle ring performs preliminary sealing action against the dynamic pressure component upstream of the sealing elements. By addressing the dynamic pressure issue beforehand, it prevents the subsequent wear and failure that would otherwise affect the sealing elements.
4Reliability
If multiple sealing elements are arranged in series, then sealing effectiveness is improved, but dynamic pressure causes migratory wear throughout the packing
Solution Approach 1:
The throttle ring performs preliminary sealing against the dynamic pressure component upstream of all sealing elements. This preliminary action prevents the migratory wear effect from propagating through the entire packing series, protecting all sealing elements simultaneously.
Solution Approach 2:
The throttle ring acts as a protective intermediary positioned upstream of the entire sealing element series. It mediates the dynamic pressure effects, preventing them from reaching and progressively wearing out the multiple sealing elements arranged in series.
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 throttle ring provides improved sealing of dynamic pressure, reduces wear on subsequent sealing elements, and prevents contamination of the compressed fluid, thereby extending the service life of the piston end system and maintaining fluid purity.
Implementation Method 1
The at least one radial bore provides fluid communication between the radially inner running surface and the radially outer circumferential surface of the throttle ring
Implementation Method 2
The running surface has at least one groove extending in the circumferential direction, which is connected to the radially outer circumferential surface by at least one radial bore or radial channel... pulsating pressure components are only insufficiently dampened
Data Source
Figure 1~2a
Figure 2b(A-A)~2c(B-B)
Figure 3a
AI summary
Throttle ring (1) for a piston compressor, wherein the throttle ring (1) comprises an axially extending ring axis (Ar), an axial height (h), a radially inner running surface (2) and a radially outer circumferential surface (3), as well as an upper flank (4) and a lower flank (5), wherein the upper flank (5) faces the compression chamber (11) of the piston compressor in the intended use of the throttle ring (1). The running surface (2) has at least one circumferential groove (6) which is connected to the radially outer circumferential surface (3) by at least one radial bore (7).