Drilling Pump Crosshead Lubrication Structure for Eccentric Wear
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Solution Overview
Problem
The lubrication between the upper and lower guide plates and the crosshead in drilling pumps is insufficient, leading to eccentric wear and strain on the guide plates and crosshead.
Innovation Solution
A crosshead part for drilling pumps is designed with an upper guide plate, a lower guide plate, and a crosshead, where at least one of the guide plates has an oil inlet for introducing external lubricating oil between the guide plates and the crosshead. The system includes oil grooves to disperse the lubricating oil effectively, and the components are made from materials with varying hardness to enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil drip lubrication is used between the lower guide plate and the crosshead part, then the structure is simple, but the lubrication is not sufficient
Solution Approach 1:
The patent applies hydraulic lubrication by introducing external lubricating oil through oil inlets into oil grooves on the guide plates and crosshead. This hydraulic lubrication system replaces the insufficient oil drip lubrication, ensuring sufficient and consistent lubrication between the lower guide plate and crosshead part, thereby resolving the contradiction between lubrication sufficiency and system complexity.
Solution Approach 2:
The patent designs oil grooves on the guide plates and crosshead surfaces that function as porous structures for oil distribution. These grooves channel and distribute lubricating oil evenly across the contact surfaces, ensuring sufficient lubrication while maintaining a relatively simple structural design, thus resolving the technical contradiction.
2Reliability
If the guide plate is installed by a small fixed plate through the frame support rib, then the installation structure is simple, but the guide plate deforms locally and contact area is poor
Solution Approach 1:
The patent segments the guide plate installation by providing multiple oil inlets and oil grooves across different areas of the guide plate and crosshead. This segmentation allows for even distribution of lubricating oil and ensures uniform contact across the entire contact area, preventing local deformation while maintaining installation simplicity.
Solution Approach 2:
The patent applies local quality by positioning oil grooves and oil inlets at specific locations on the guide plates and crosshead surfaces. This ensures that lubrication is delivered precisely where contact occurs, maximizing the effective contact area and preventing local deformation without complicating the overall installation structure.
3Reliability
If support ribs are unevenly distributed in the frame, then the installation structure is simple, but the guide plate has no support in the middle and deforms
Solution Approach 1:
The patent creates equipotential support conditions by distributing oil grooves and oil inlets evenly across the guide plate and crosshead surfaces. This even distribution of lubrication points provides uniform support throughout the guide plate, including the middle area, preventing deformation while maintaining simple frame structure.
Solution Approach 2:
The patent addresses the support issue by adding a lubrication dimension - oil grooves and oil inlets are positioned in the middle and across the guide plate surface. This dimensional addition of lubrication pathways provides virtual support points that prevent guide plate deformation without requiring additional physical support ribs.
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 improved lubrication system effectively reduces eccentric wear and strain on the crosshead and guide plates, enhancing the reliability and performance of the drilling pump by ensuring consistent and sufficient lubrication.
Implementation Method 1
at least one of the upper and lower guide plates has an oil inlet for introducing external lubricating oil between the at least one of the upper and lower guide plates and an arc surface of the crosshead
Data Source
AI summary
A crosshead part for drilling pumps includes an upper guide plate, a lower guide plate and a crosshead, wherein the crosshead reciprocates in a straight line between the upper guide plate and the lower guide plate; at least one of the upper and lower guide plates has an oil inlet for introducing external lubricating oil between the at least one of the upper and lower guide plates and an arc surface of the crosshead. A crosshead system for drilling pumps includes a lubricating pipeline system and the crosshead part. The lubricating pipeline system includes a main pipeline and N branch pipelines. A drilling pump includes the crosshead part or the crosshead system.