Hydraulic Press Motor Restart Using Pump Drive During Idle
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Solution Overview
Problem
Hydraulic press systems face high wear and energy consumption issues due to frequent switching of the main electric motor during idling phases, leading to short service life of switching devices and excessive energy usage when running continuously.
Innovation Solution
Implementing a method where the main pump is switched to a drive mode to accelerate the main electric motor using hydraulic fluid, with an auxiliary drive maintaining the motor at a predetermined speed until electrical energy is reconnecting at the end of the idling phase, reducing electrical energy consumption and wear on switching devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the main electric motor is switched off during idling phase, then electrical energy consumption is reduced, but the switching devices experience high wear and short service life
Solution Approach 1:
The auxiliary electric motor performs preliminary action by bringing the main electric motor to a predetermined speed before the idling phase begins, so that when the main motor is switched off, it is already in an optimal state that reduces switching wear while maintaining energy efficiency
2Reliability
If the main electric motor is kept running constantly, then the service life of switching devices is extended, but electrical energy consumption increases
Solution Approach 1:
The system dynamically adjusts the operating state of the main electric motor based on operational phase - running during working phases, switched off during idling phases, and using auxiliary motor for speed maintenance - thereby optimizing both reliability and energy consumption
3Use of energy by moving object
If the main electric motor is switched on frequently during short idling phases, then electrical energy consumption is reduced, but the wear on switching devices increases significantly
Solution Approach 1:
The auxiliary electric motor acts as an intermediary that prepares the main electric motor for shutdown by bringing it to a predetermined speed, thereby enabling frequent switching without causing excessive wear on the switching devices
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 approach extends the service life of switching devices and reduces electrical energy consumption by minimizing frequent start-ups and maintaining the main electric motor at a predetermined speed using hydraulic fluid, optimizing energy usage and wear reduction.
Implementation Method 1
the main pump is switched to a drive mode in which it is driven by the hydraulic fluid flowing through it and drives the main electric motor
Implementation Method 2
the hydraulic fluid is conveyed by the main pump by means of an auxiliary drive
Data Source
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AI summary
To control a hydraulic press, which has at least one main pump (P1) driven by a main electric motor (M1) and by means of which hydraulic fluid can be conveyed to an adjustable press section (S), the main electric motor (M1) is switched off during an idle phase of the hydraulic press and switched on again at the end of the idle phase and accelerated to a predetermined speed. It is provided that the main pump (P1) is switched to a drive mode to accelerate the main electric motor (M1), in which it is driven by the hydraulic fluid flowing through it and drives the main electric motor (M1).The hydraulic fluid is conveyed through the main pump (P1) by means of an auxiliary drive (Mh, Ph, M2, P2, S), so that the main pump (P1) drives the main electric motor (M1), whereby the main electric motor (M1) is supplied with electrical energy when a predetermined speed is reached and the main pump (P1) is switched into a pumping mode.