Ring-Line Hydraulic Layout for Independent Press Units
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Solution Overview
Problem
Existing hydraulic systems for tire presses require large line cross-sections and complex maintenance due to separate supply and return lines, leading to high installation costs and maintenance efforts, especially when multiple hydraulic units operate independently with their own pumps and fluid conditioning systems.
Innovation Solution
A hydraulic system with a ring line connecting all hydraulic units to a central unit, where each unit has a drivable auxiliary pump and only differential volumes are routed through the ring line, eliminating the need for a separate return line and reducing material requirements for installation, and incorporating a central unit with main pumps and conditioning devices for efficient fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate supply line and return line are used for each hydraulic unit, then hydraulic fluid can be supplied to all consumers, but line cross-sections become large and material requirements increase
Solution Approach 1:
The patent merges the supply line and return line into a single ring line that serves all hydraulic units. The ring line is configured so that hydraulic fluid flows through it in one direction, supplying each hydraulic unit sequentially. This eliminates the need for separate return lines and reduces the total material required while maintaining reliable hydraulic fluid supply to all consumers.
Solution Approach 2:
The ring line performs multiple functions: it acts as a supply line for hydraulic fluid, a return path for excess fluid, and a pressure distribution network. Each hydraulic unit connects to the ring line at two points, allowing the same line to both supply and return fluid without requiring separate dedicated lines for each function.
2Adaptability or versatility
If each hydraulic unit has its own pumps and conditioning devices, then hydraulic units can operate independently, but maintenance effort and device complexity increase
Solution Approach 1:
The patent combines the pumping function into a single centralized pump located in the control unit, which supplies hydraulic fluid to all hydraulic units through the ring line. Each hydraulic unit has its own auxiliary pump that can draw fluid from the ring line and return it, enabling independent operation without requiring separate main pumps and conditioning devices at each unit.
Solution Approach 2:
The ring line acts as an intermediary that connects all hydraulic units to the centralized pump and control unit. It distributes hydraulic fluid from the central source to individual units while allowing each unit to operate independently by drawing from and returning to the common ring line, thus reducing overall system complexity.
3Reliability
If main pumps are adapted to dynamic demands of irregularly operated hydraulic units, then all units can be supplied, but pump complexity and installation effort increase
Solution Approach 1:
The centralized pump in the control unit continuously supplies hydraulic fluid to the ring line at a steady rate, preparing the system in advance for any operational demands. Each hydraulic unit has an auxiliary pump that can immediately draw from the pre-filled ring line when needed, eliminating the need for complex dynamic adaptation of the main pump while ensuring reliable supply.
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 design reduces the size and material requirements of the supply line, lowers maintenance needs, and allows for more efficient energy recovery through smaller main pumps and auxiliary pumps, enhancing the overall efficiency and reliability of the hydraulic system.
Implementation Method 1
each hydraulic unit has a drivable auxiliary pump which is arranged in the second line of the respective hydraulic unit
Implementation Method 2
The central unit also has at least one main pump, with which the hydraulic fluid is pumped from the hydraulic fluid tank into the ring line, with the main pump providing the pressure required to actuate the hydraulic consumers
Data Source
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AI summary
The invention relates to a hydraulic system comprising a plurality of hydraulic units (1), which each have at least one hydraulic consumer (2) in each case having a first hydraulic connection (3) and a second hydraulic connection (4); a supply line to which the hydraulic units (1) are connected; and a central unit (5) for providing and pressurizing the hydraulic fluid conveyed in the supply line, characterized in that the supply line is in the form of a loop (6) leading into and out of the central unit (5), in that the hydraulic units (1) each have a first line (7) and a second line (8), and in that the hydraulic units (1) each have a drivable auxiliary pump (9), which is arranged in the second line (8) of each particular hydraulic unit (1).