Cartridge Injector Manifold Assembly Without Banjo Bolt Connections
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Solution Overview
Problem
Current injector and manifold configurations require complex and costly manufacturing processes due to high aspect ratios and separate components, making maintenance and replacement cumbersome and expensive.
Innovation Solution
A cartridge injector design with a poppet and piston mechanism integrated within a cartridge body, allowing for lubricant flow between an inlet and outlet passage without the need for banjo bolts, simplifying the manufacturing process and enabling easy assembly and disassembly without disconnecting lubricant supply lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If injectors are separate components mechanically joined to manifold via banjo bolts, then fluid connection can be established, but maintenance and replacement require breaking multiple fluid connections and disassembling significant portions of the lubrication system
Solution Approach 1:
The injector body is integrated directly with the manifold body to form a single unified component. The injector passages are formed as internal passages within the manifold body, eliminating the need for separate injector components and banjo bolt connections. This integration allows the injector to be replaced as a single component without disconnecting supply lines or breaking multiple fluid connections.
2Ease of manufacture
If internal passages of injectors have large aspect ratios, then fluid flow path is established, but manufacturing cost increases due to multiple manufacturing operations required to interconnect passages
Solution Approach 1:
The injector passages are merged with the manifold passages to form a unified internal passage system. The manifold body is designed with integrated passages that perform both manifold distribution and injector metering functions, eliminating the need for separate high-aspect-ratio injector passages and reducing manufacturing operations.
3Productivity
If multiple manufacturing operations are used to interconnect internal passages, then fluid flow path is formed, but manufacturing cost and time increase
Solution Approach 1:
The passage formation operations for the manifold and injector are merged into a single integrated manufacturing process. The manifold body is manufactured with pre-formed passages that serve dual purposes, eliminating the need for subsequent drilling and tapping operations that would be required for separate injector components.
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 design reduces manufacturing costs, simplifies maintenance, and allows for the cartridge injector to be installed and removed as a single component, improving operational efficiency and reducing downtime.
Implementation Method 1
spring 21 disposed between poppet flange 22 and head 23 of piston 20... Spring 21 displaces piston 20 axially away from poppet 19 and back to the initial position
Implementation Method 2
The lubricant pressure builds in the drive cavity 29 and displaces piston 20 axially towards poppet 19 to place injector 10 in the third state shown in FIG. 2C
Implementation Method 3
Banjo bolt 12 defines inlet cavity 14 while body 13 defines outlet cavity 15. Passage 16 interconnects inlet cavity 14 to outlet cavity 15
Data Source
AI summary
A cartridge injector cooperates with internal features of a manifold to form a complete injector assembly. The cartridge injector includes a poppet that translates within a central passage of an injector body to distribute fluid between an inlet region and an outlet region of the central passage. A piston reciprocates relative to the injector body, blocking and unblocking the inlet region, or outlet region, of the central passage to meter a volume of fluid delivered to an outlet of the manifold.