Electric Lubricator Motor Deceleration for Precise Grease Dispensing
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Solution Overview
Problem
Existing electric-powered lubricators face challenges in quickly dispensing a desired amount of lubricant while minimizing excess lubricant dispensing, particularly when the motor is rotated at high speeds, leading to inefficiencies and excess lubricant discharge.
Innovation Solution
The electric-powered lubricator incorporates a control circuit that manually operates an electric motor at a preset rotational speed, calculates the reciprocation count of a plunger, and decelerates the motor based on a difference between a setting and calculated value, allowing for precise control to stop the motor quickly and reduce excess lubricant dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor is rotated at high speed to efficiently dispense lubricant, then the dispensing speed is improved, but the motor cannot stop promptly causing excess lubricant to be dispensed
Solution Approach 1:
The control circuit calculates the reciprocation count of the plunger in advance and determines the optimal stopping point before the motor actually stops. By predicting the remaining lubricant in the chamber based on the reciprocation count, the system can stop the motor at the precise moment when the desired amount of lubricant has been dispensed, preventing excess dispensing while maintaining high-speed operation.
Solution Approach 2:
The control circuit continuously monitors the reciprocation count of the plunger and uses this feedback to determine when to stop the motor. The system compares the calculated reciprocation count against the desired amount of lubricant to be dispensed, and stops the motor when the target is reached, thereby preventing excess lubricant dispensing while maintaining high dispensing speed.
2Loss of substance
If the motor is stopped quickly to prevent excess lubricant dispensing, then the lubricant loss is reduced, but the time required to dispense the desired amount of lubricant increases
Solution Approach 1:
The patent replaces the mechanical stop method with an electronic control system that calculates the reciprocation count and determines the optimal stopping point. This substitution allows for precise control of the motor stopping timing without mechanical interference, enabling the motor to stop quickly at the exact moment when the desired lubricant amount has been dispensed, thus preventing excess dispensing while maintaining short dispensing time.
Solution Approach 2:
The control circuit dynamically adjusts the motor stopping parameter based on the calculated reciprocation count. By changing the stopping criterion from a fixed mechanical stop to a dynamically calculated stopping point based on lubricant volume and plunger reciprocation, the system achieves both quick stopping to prevent excess dispensing and maintains efficient dispensing speed.
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 reduces the time required to dispense a desired amount of lubricant while minimizing excess lubricant, enhancing the efficiency and accuracy of lubricant dispensing.
Implementation Method 1
an electric motor configured to generate a driving force
Data Source
AI summary
One aspect of the present disclosure provides an electric-powered lubricator including a first manual switch, an electric motor, a drive circuit, a pump, and a control circuit. The control circuit controls, while the electric motor is being driven, the drive circuit such that the electric motor decelerates from a preset rotational speed in accordance with a difference between (i) a setting value and (ii) a calculated value. The setting value corresponds to a desired count of reciprocation of a plunger in the pump. The calculated value corresponds to a calculated count of reciprocation of the plunger.