Integrated Low-Pressure Unit for Compact Hydraulic Drive Boosting
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Solution Overview
Problem
Conventional hydraulic drives require an external aggregate and additional piping or hoses to raise the pressure level, which reduces compactness, increases maintenance complexity, and is inefficient.
Innovation Solution
A low-pressure unit integrated with a hydraulic drive, featuring a tank pressure memory, a low-pressure memory, and a motor-driven pump, connected via a hydraulic coupling block, allowing direct integration and eliminating the need for external aggregates and hoses, with switching valves for closed or open system operation and a check valve to prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external unit is used to raise pressure level in hydraulic drive, then pressure adjustment capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines the pressure-raising unit with the hydraulic drive by integrating the pump into the existing hydraulic circuit. The pump is connected to the hydraulic drive through hydraulic coupling, allowing the pressure adjustment function to be merged with the main hydraulic system rather than operating as a separate external unit. This reduces overall system complexity while maintaining pressure adjustment capability.
Solution Approach 2:
The hydraulic pump serves multiple functions: it raises the pressure level in the hydraulic drive while also being integrated into the existing hydraulic circuit. The pump can operate in different modes (closed circuit and open circuit) depending on system requirements, providing universal functionality that reduces the need for additional specialized components.
2Adaptability or versatility
If an external unit with piping or hoses is used, then pressure level can be raised, but compactness is reduced
Solution Approach 1:
The pump and its hydraulic connections are integrated directly into the hydraulic drive's existing circuitry. The pump is hydraulically coupled to the hydraulic drive through the existing hydraulic fluid, eliminating the need for separate external piping or hoses. This merging of components significantly improves system compactness while maintaining the pressure raising capability.
3Adaptability or versatility
If external piping or hoses are used for fluid supply, then pressure adjustment is enabled, but maintenance complexity increases
Solution Approach 1:
The pump is integrated into the hydraulic drive's internal circuit, eliminating external piping and hoses that would require maintenance. The hydraulic coupling uses the existing hydraulic fluid path within the drive, reducing the number of external connection points and potential failure sites. This integration significantly reduces maintenance complexity while maintaining fluid supply capability.
4Stress or pressure
If an external aggregate is used, then pressure level can be increased, but installation space and effort increase
Solution Approach 1:
The pressure-raising pump is merged with the hydraulic drive system, utilizing the existing space and mounting structure of the hydraulic drive. The pump is hydraulically coupled to the drive through internal connections, eliminating the need for separate external mounting space and reducing overall installation footprint while maintaining the ability to increase pressure levels.
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 configuration enhances compactness, reduces maintenance, ensures consistent pressure, and allows for efficient pressure adjustment and fluid management within the hydraulic drive, enabling simpler service and energy savings.
Implementation Method 1
a tank pressure accumulator (2) for storing a fluid (pressure medium) at a desired pressure
Implementation Method 2
a pump (4) which conveys the fluid from the tank pressure accumulator (2) into a low-pressure accumulator (3)
Implementation Method 3
The pump (4) has a check valve which prevents the fluid from flowing back from the low-pressure accumulator (3) to the pump (4)
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a low-pressure unit (1) for raising a pressure level in a hydraulic drive (8). The low-pressure unit (1) comprises a tank pressure accumulator (2) for storing a hydraulic fluid at a desired pressure, a low-pressure accumulator (3) downstream of the tank pressure accumulator (2) for intermediate storage of the fluid, and a hydraulic pump (4) driven by a motor (5). According to the invention, the tank pressure accumulator (2), the low-pressure accumulator (3), and the pump (4) are hydraulically coupled to one another via a connecting block (6), and the connecting block (6) is designed such that the low-pressure unit (1) can be directly integrated into or connected to a main control block of the hydraulic drive (8) via the connecting block (6), or is already integrated into or connected to it.