Traction machine and lifting equipment
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Solution Overview
Problem
Existing traction machines in lifting equipment often experience slipping, over-speed, or non-operation issues, leading to uncontrolled lifting speed, and voltage fluctuations that affect controller stability during descending operations.
Innovation Solution
Incorporating a sensor sensing member and traction machine sensor to detect abnormal operations, and a resistance module to maintain bus voltage within safe ranges, along with a stall braking device and anti-falling mechanisms to ensure controlled speed and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traction machine operates without monitoring devices, then the device complexity is low, but the reliability of lifting speed control deteriorates when slipping or over-speed occurs
Solution Approach 1:
The patent applies preliminary action by pre-installing sensors on the fixed pulley to detect rotation speed before abnormal conditions occur. The sensor sensing member is positioned to detect the rotation state of the fixed pulley in advance, allowing the controller to identify slipping or over-speed conditions before they lead to uncontrolled lifting, thus improving reliability without requiring complex real-time intervention systems.
Solution Approach 2:
The patent implements feedback by using the traction machine sensor to continuously monitor the rotation speed of the fixed pulley and send this information back to the controller. The controller then adjusts the traction pulley rotation based on this feedback, creating a closed-loop control system that maintains reliable lifting speed control while keeping the monitoring system relatively simple through direct feedback utilization.
2Stability of the object's composition
If the bus voltage is allowed to fluctuate during descending operations, then the device complexity is low, but the stability of the controller deteriorates
Solution Approach 1:
The patent applies self-service by enabling the resistance module to automatically regulate bus voltage without external intervention. When voltage exceeds safe ranges during descending operations, the resistance module dissipates excess energy through controlled resistance, maintaining controller stability autonomously. This simple voltage regulation mechanism improves controller stability while avoiding complex active regulation systems.
3Reliability
If no detection mechanism is installed, then the ease of operation is high, but the ability to detect abnormal operations deteriorates
Solution Approach 1:
The patent extracts the detection function from a complex monitoring system by using a simple rotation speed sensor mounted on the fixed pulley. This extracted sensor specifically detects rotation speed abnormalities that indicate slipping or over-speed conditions, providing reliable abnormal operation detection while maintaining ease of operation through minimal additional components.
Solution Approach 2:
The patent applies universality by designing the fixed pulley with an integrated sensor sensing member that serves multiple functions: it monitors rotation speed for slipping detection, detects over-speed conditions, and provides feedback for controller adjustment. This multi-functional sensor improves detection capability while avoiding the need for separate specialized sensors for each abnormal 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
The solution effectively monitors and controls traction machine operations, prevents uncontrolled speed, and stabilizes bus voltage, enhancing the safety and reliability of lifting equipment by detecting abnormalities and implementing corrective measures.
Implementation Method 1
the resistance module will automatically generate heat and convert the additional electric energy into the heat energy of the resistance module to be consumed
Data Source
AI summary
The present application relates to the technical field of lifting equipment, and provides a traction machine and a lifting equipment. The traction machine includes traction pulleys, traction ropes driven by the traction pulleys and fixed pulleys for changing directions of the traction ropes. The fixed pulley is provided with a sensor sensing member rotating with the fixed pulley, a traction machine sensor is arranged beside the fixed pulley; the traction machine sensor is configured to detect a rotation speed of the sensor sensing member, and send the rotation speed to a controller of the traction machine; the controller controls a rotation of the traction pulley according to detected data of the traction machine sensor. Since this kind of traction machine is provided with the sensor sensing member and the traction machine sensor, it is capable of detecting whether the traction machine has an abnormal operation, and stopping the traction machine immediately in an abnormal state.