Crosshead Linear Drive Assembly With Wear Plates for Fracturing Pumps
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Solution Overview
Problem
The existing linear drive assemblies in hydraulic fracturing operations experience high wear rates due to extreme pressures and vibrations, leading to frequent maintenance needs and reduced operational efficiency.
Innovation Solution
The development of a linear drive assembly with a crosshead assembly that eliminates the thrust seat and uses wear plates made of softer materials to absorb wear, along with a wrist pin and retainer system that reduces stress on components, thereby extending maintenance intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional linear drive assemblies with thrust seats are used, then structural strength is maintained, but wear rates increase due to extreme pressures and vibrations
Solution Approach 1:
The patent removes the thrust seat from the linear drive assembly, extracting the source of high wear. By eliminating this component, the design reduces wear rates while maintaining structural integrity through alternative support mechanisms.
Solution Approach 2:
The patent changes the material parameters of the wrist pin and connecting rod, specifying harder materials with improved wear resistance properties. This parameter change directly addresses the wear problem while maintaining compatibility with operational requirements.
2Duration of action of stationary object
If wear-resistant materials are used in high-stress areas, then component lifespan is extended, but manufacturing complexity increases
Solution Approach 1:
The patent applies wear-resistant materials selectively to specific high-stress components (wrist pin, connecting rod) rather than throughout the entire assembly. This localized approach extends maintenance intervals while keeping manufacturing complexity manageable by focusing material upgrades only where needed.
3Object-generated harmful factors
If the thrust seat is eliminated, then wear is reduced, but structural support must be redistributed
Solution Approach 1:
The wrist pin and connecting rod are designed to perform multiple functions: they provide structural support, transmit forces, and resist wear through their hardened materials. This multi-functionality compensates for the removed thrust seat without significantly increasing overall device complexity.
Data Source
AI summary
A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.