Hollow Stud High Pressure Pump Seal Design
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Solution Overview
Problem
High pressure fluid pumps face challenges in maintaining effective seals and structural integrity at pressures exceeding 30,000 psi, where conventional solutions fail to prevent leakage and ensure reliable operation.
Innovation Solution
The design incorporates a hollow stud with a cylindrical space housing a high pressure cylinder, a seal head, and an end cap that applies compressive force to the seal head and tensile force to the stud, along with a plunger for pressurizing fluid, ensuring a secure seal and structural integrity at extreme pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional sealing systems are used at high pressures, then the pump can operate at high pressure, but sealing effectiveness deteriorates and leakage occurs
Solution Approach 1:
The pump assembly is divided into separate functional components: a pump housing, a pressurization assembly with plunger, and a seal head assembly. This segmentation allows each component to be optimized for its specific function, with the seal head specifically designed to maintain sealing effectiveness at high pressures through independent positioning and compression mechanisms.
Solution Approach 2:
The seal head acts as an intermediary component between the high-pressure fluid environment and the external housing. It incorporates sealing elements that directly contact the high-pressure fluid while being independently positionable and compressible, mediating the pressure forces and preventing leakage to the external environment.
2Stress or pressure
If high pressure is applied to maintain fluid pressure, then pressurization effectiveness improves, but structural integrity deteriorates due to stress on components
Solution Approach 1:
The structure is segmented into a pump housing that contains pressure and a separate pressurization assembly that generates pressure. This allows the housing to be optimized for containing high pressure while the pressurization assembly handles the mechanical forces of pressure generation, distributing structural demands across specialized components.
Solution Approach 2:
The hollow stud extends in the axial dimension, providing a structural element that can withstand compressive and tensile loads along its length. This dimensional orientation allows the stud to function as both a structural support and a pressure-containing element, distributing stresses along its elongated form.
3Reliability
If seal compression is increased to prevent leakage, then sealing effectiveness improves, but the complexity of the sealing mechanism increases
Solution Approach 1:
The seal head assembly combines multiple functions into a single integrated component: it houses the sealing elements, provides independent positioning capability, and incorporates compression mechanisms. This merging reduces the number of separate components needed while maintaining sealing effectiveness through the multi-functional design of the seal head.
Solution Approach 2:
The seal head is designed with independent positioning capability, allowing it to dynamically adjust its position and compression force on the sealing elements. This dynamic adjustment enables the sealing mechanism to maintain effectiveness under varying pressure conditions without requiring overly complex fixed-position sealing systems.
4Volume of moving object
If hollow stud is used to house high pressure cylinder, then space efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The high-pressure cylinder and plunger assembly is nested within the hollow stud, which itself is integrated into the pump housing structure. This nesting arrangement maximizes space utilization by placing the pressurization components within the existing structural framework rather than requiring separate housings, while the modular nature of the nested components facilitates manufacturing.
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
This configuration maintains a reliable seal and structural integrity, allowing the pump to operate effectively at pressures in excess of 30,000 psi without leakage, ensuring efficient fluid pressurization and prolonged component durability.
Implementation Method 1
The end cap is operable to apply a compressive force to the seal head to compress the seal head against the cylinder
Implementation Method 2
The end cap is operable to apply a tensile load to the hollow stud
Implementation Method 3
A plunger is movable within the bore to pressurize the fluid in a space defined by the piston, the seal head, and the high pressure cylinder
Data Source
AI summary
A high-pressure fluid pump is operable to pressurize a fluid and includes a hollow stud including a first end, a second end, and a cylindrical space extending between the first end and the second end and a housing fixedly coupled to the first end of the hollow stud. A high pressure cylinder is disposed within the cylindrical space of the hollow stud. The high pressure cylinder includes a bore that extends from a first end to a second end of the high pressure cylinder. A seal head is engaged with the first end of the high pressure cylinder to define a seal therebetween and an end cap is coupled to the second end of the hollow stud and the seal head. The end cap is operable to apply a compressive force to the seal head to compress the seal head against the cylinder and to apply a tensile load to the hollow stud. A plunger is movable within the bore to pressurize the fluid in a space defined by the piston, the seal head, and the high pressure cylinder.