Self-Diagnostic Lubrication Pump for Multi-System Cold Operation
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Solution Overview
Problem
Existing automatic lubrication systems lack a simplified pump unit design that can be used with a wide variety of lubricant distribution systems and efficiently operate across different environmental conditions, particularly in colder temperatures where lubricant viscosity increases.
Innovation Solution
A pump unit with a reservoir, a stirrer to maintain lubricant viscosity, and a piston-driven pumping mechanism with a check valve and vent passage, along with a controller for calibrating and controlling the linear position drive mechanism, allowing for efficient lubricant distribution through different types of lubricant distribution systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional pump design is used in automatic lubrication systems, then the system can operate reliably, but the pump unit design becomes complex and cannot be easily adapted to different distribution systems
Solution Approach 1:
The pump unit is designed with a universal configuration that can interface with multiple types of lubricant distribution systems (progressive valve systems, injector systems, and other distribution architectures). The pump incorporates a standardized outlet configuration and control interface that enables it to function across different system types without requiring custom design variations, thereby achieving multi-functionality and broad adaptability.
Solution Approach 2:
The pump employs a programmable controller that enables dynamic adjustment of pumping parameters including stroke length, pumping rate, and operational timing. This dynamic control capability allows the same pump hardware to adapt its performance characteristics to match the specific requirements of different distribution systems and operating conditions, reducing the need for physical design changes.
2Temperature
If the pump operates in colder temperatures, then it can function in various environmental conditions, but the lubricant viscosity increases making pumping less efficient
Solution Approach 1:
The system incorporates a heater element within the reservoir that actively heats the lubricant to maintain it at an optimal temperature. By controlling the lubricant temperature, the system prevents excessive viscosity increase in cold conditions, ensuring the lubricant remains pumpable and the pumping mechanism operates efficiently across a wide temperature range.
Solution Approach 2:
The heater operates in advance to pre-warm the lubricant before the pumping cycle begins, particularly important in cold environments. This preliminary heating action ensures that when pumping starts, the lubricant is already at an appropriate viscosity for efficient pumping, preventing startup difficulties and maintaining productivity throughout operation.
3Productivity
If a stirrer is added to maintain lubricant viscosity, then pumping efficiency in cold conditions improves, but the device complexity increases
Solution Approach 1:
The stirrer mechanism is integrated into the reservoir structure, with the stirrer shaft and mixing elements combined with the reservoir walls and bottom. This merged design eliminates the need for separate, standalone mixing apparatus and allows the stirrer to be driven by the same motor that operates the pump, thereby maintaining pumping efficiency while minimizing additional complexity.
Solution Approach 2:
The motor that drives the pump mechanism is also coupled to drive the stirrer, allowing a single motor to perform multiple functions. This multi-functional approach enables the system to maintain lubricant viscosity through stirring while using the same power source for pumping, thereby improving cold-weather performance without proportionally increasing system complexity.
4Reliability
If self-diagnostic features are implemented, then potential failures can be identified, but the device complexity increases
Solution Approach 1:
The pump incorporates sensors that monitor key operational parameters such as pressure, temperature, and motor current. These sensors provide real-time feedback to the programmable controller, which analyzes the data to detect abnormal conditions indicating potential failures. This feedback mechanism enables early identification of problems while using existing control infrastructure, thereby improving reliability with minimal additional complexity.
Solution Approach 2:
The diagnostic system is designed to automatically monitor and assess the pump's own operational status without requiring external monitoring equipment. The programmable controller continuously evaluates sensor data and can detect issues such as clogging, wear, or malfunctioning components, allowing the system to self-diagnose and alert operators to potential failures before they result in system downtime.
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 solution enables efficient lubricant distribution across various systems and temperature conditions, ensuring consistent operation and flexibility in installation, while the self-diagnostic features help identify potential failures and adjust pumping parameters for optimal performance.
Implementation Method 1
a check valve in the cylinder bore between the piston and the cylinder outlet for blocking backflow through the outlet
Implementation Method 2
a vent passage communicating with the cylinder bore at a location upstream from the check valve for venting the lubricant distribution system
Data Source
AI summary
Apparatus and method for supplying lubricant to a plurality of lubrication sites. Embodiments include a pump with venting and non-venting piston return, a pump with stirrer and direct feed mechanism, a pump with CAN system and self-diagnostics, a pump with heated housing and reservoir, a pump with stepper motor and overdrive control and a pump able to be used with a plurality of different types or of lubrication systems.