Hydraulic Pump Washout Detection via Rotational Encoder Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic fracturing operations face challenges due to wear in suction and discharge valves of hydraulic pumps, leading to potential irreparable damage and operational inefficiencies.
Innovation Solution
The implementation of a rotation sensor unit equipped with a sensor and sensor targets on the drivetrain's rotary member, which generates a time-dependent signal analyzed using Fourier transforms to detect washout conditions in hydraulic pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pump operation continues without monitoring, then operational time is maximized, but valve wear leads to irreparable damage and pump failure
Solution Approach 1:
The patent applies preliminary action by implementing a monitoring system that detects valve wear conditions before they lead to complete pump failure. The rotation sensor unit continuously monitors the drivetrain, and the controller analyzes signals to identify washout conditions early, allowing maintenance to be scheduled before irreparable damage occurs. This proactive approach prevents operational delays by addressing issues while the pump is still functional.
Solution Approach 2:
The patent implements feedback through a closed-loop monitoring system where the rotation sensor unit provides continuous signals to the controller, which analyzes the data and provides feedback about valve condition. When washout conditions are detected, the system alerts operators to schedule maintenance. This feedback mechanism enables continuous assessment of pump health and timely intervention to maintain reliability.
2Reliability
If pump maintenance is performed frequently, then valve wear and damage are prevented, but operational productivity decreases due to maintenance interruptions
Solution Approach 1:
The monitoring system enables preliminary detection of valve wear conditions, allowing maintenance to be performed only when necessary. By identifying washout conditions early through rotation signal analysis, the system allows operators to schedule maintenance during planned downtime rather than performing frequent preventive maintenance, thus maximizing operational productivity while maintaining reliability.
Solution Approach 2:
The patent enables condition-based maintenance where pumps continue operating until actual wear conditions are detected. Instead of discarding time for frequent scheduled maintenance, the system recovers productivity by allowing continuous operation and only interrupting when the monitoring system detects actual valve wear requiring intervention.
3Reliability
If rotation sensor monitoring is implemented, then washout conditions are detected early, but device complexity increases
Solution Approach 1:
The patent uses an intermediary approach by placing the rotation sensor unit on the drivetrain to indirectly monitor valve conditions. Rather than directly measuring valve wear, the system uses the rotation characteristics of the drivetrain as an intermediary indicator of washout conditions. This indirect measurement approach maintains simplicity while enabling early detection of valve issues.
Solution Approach 2:
The patent replaces complex direct mechanical monitoring of valve conditions with a simpler rotational sensor system. Instead of using mechanical probes or direct contact sensors to measure valve wear, the system uses rotational encoders to detect changes in drivetrain rotation characteristics, substituting a simple mechanical measurement for a complex direct valuation of valve condition.
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 solution enables early detection and characterization of washout conditions, allowing for timely maintenance and reducing the risk of pump failure and operational delays in hydraulic fracturing operations.
Implementation Method 1
The rotational encoder is employed to detect variations in the rotating speed of the input shaft to the power end, which corresponds to a specific frequency under observation. The Fourier transform may be utilized as a method to analyze the frequency variations in the data obtained from the rotational encoder.
Implementation Method 2
These structures may include, for example, an optical or electromagnetic pickup system.
Implementation Method 3
The Fourier transform may be utilized as a method to analyze the frequency variations in the data obtained from the rotational encoder. This analysis helps isolate the frequency indicative of the washout condition, allowing the controller, programmed accordingly, to associate the identified washout condition with a specific cylinder within the system.
Data Source
AI summary
A hydraulic pump system includes a hydraulic pump with reciprocating pistons. A rotational encoder is provided to sense values representative of a rotational velocity in a rotating drivetrain member. The values are analyzed to indicate a washout condition affecting the displacement of at least one piston. The hydraulic pump is scheduled for maintenance and repaired based upon the outcome of this analysis.