Hydraulic Hammer Lubrication Pump Layout for Tight-Space Installation
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Solution Overview
Problem
Traditional lubrication systems for hydraulic hammers are complex, bulky, and prone to component wear, posing challenges during installation and operation, especially in tight spaces.
Innovation Solution
A simplified lubrication system comprising a body, sleeve, piston, and spool, where the sleeve has a stepped tubular cavity and inlet/outlet ports, allowing for axial movement of the piston to deliver lubricant from an inlet to an outlet, reducing the number of components and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional worm gear and wheel-driven eccentric shaft system is used, then the lubrication function is achieved, but the device complexity and component wear increase
Solution Approach 1:
The patent extracts and eliminates the complex worm gear and eccentric shaft components from the traditional lubrication system. Instead, it uses a simple plunger pump mechanism with a piston, cylinder, and inlet/outlet ports, directly achieving the lubrication function without the intermediate transmission components that cause wear and complexity.
Solution Approach 2:
The patent replaces the mechanical worm gear and eccentric shaft transmission system with a direct-acting plunger pump system. The piston is directly actuated by the hydraulic cylinder, eliminating the need for gear transmissions and reducing mechanical complexity while maintaining the lubrication function.
2Ease of operation
If a traditional lubrication system with multiple components is used, then the lubrication function is achieved, but the system becomes bulky and difficult to install in tight spaces
Solution Approach 1:
The patent merges the lubrication pump function directly into the hydraulic cylinder assembly. The piston serves dual purposes as both the hydraulic actuator and the lubrication pump plunger, eliminating the need for separate pump components and reducing overall system volume for easier installation in tight spaces.
Solution Approach 2:
The piston is designed to serve multiple functions: it acts as the hydraulic cylinder piston for movement control and simultaneously as the plunger pump piston for lubricant delivery. This multi-functionality reduces the number of components and simplifies the overall system structure.
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 system is more compact, cost-effective, and easier to install and operate, reducing wear and accommodating tight spaces within the hydraulic hammer's housing.
Implementation Method 1
input hydraulic oil drives a motor that would, in turn, drive the wheel-driven shaft
Implementation Method 2
the piston is in sliding engagement with the inner surface adjacent the first portion of stepped tubular cavity of the sleeve
Data Source
AI summary
A lubrication system for a hydraulic hammer includes a body defining a recess in fluid communication with a lubricant inlet and a lubricant outlet. A sleeve, located co-axially within the recess, defines a stepped tubular cavity having first and second portions. The sleeve also defines inlet and outlet ports extending from an outer surface to an inner surface of the sleeve. A piston, located partly within the recess and the first portion of the stepped tubular cavity respectively, has a tubular cavity co-axial with the stepped tubular cavity. A spool is located partly within the tubular cavity and the second portion of the stepped tubular cavity respectively. The spool co-operates with the inlet and outlet ports of the sleeve for reciprocally moving the piston in relation to the body so that lubricant from the lubricant inlet is delivered by the piston to the lubricant outlet via the recess.