Integrated Hydraulic Oil Tank Cooling Device

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Solution Overview

Problem

Existing hydraulic systems require external cooling devices connected to tanks via hoses and pipelines, which occupy space and are vulnerable to damage, and lack efficient cooling solutions.

Innovation Solution

Integrating a compact cooling device with a heat exchanger and fluid working machine directly into the tank, eliminating the need for external connections and protective housings, and using a partition wall with valves to manage fluid flow and prevent oil mixing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If an external cooling device is provided for the hydraulic oil, then cooling function is achieved, but space is occupied and the system becomes complex

Engineering Contradiction:
Improvehydraulic oil temperatureVSAvoidsystem complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The cooling device is integrated directly into the tank structure, merging two separate components (tank and cooling device) into a single unified structure. This eliminates the need for external cooling devices connected by hoses and pipelines, thereby reducing system complexity while maintaining the cooling function.

Inventive Principle:
Principle #5Merging (Combining)

2Temperature

If an external cooling device is provided for the hydraulic oil, then cooling function is achieved, but space is occupied

Engineering Contradiction:
Improvehydraulic oil temperatureVSAvoidspace occupation
Core Design Contradiction:
TemperatureVSArea of stationary object

Solution Approach 1:

The cooling device is merged with the tank structure, utilizing the tank's own space for cooling functionality. This integration eliminates the need for separate external cooling devices and their connecting infrastructure, thereby reducing the total space occupation while achieving the cooling function.

Inventive Principle:
Principle #5Merging (Combining)

3Temperature

If external hoses and pipelines are used to connect cooling device to tank, then cooling function is achieved, but vulnerability to damage increases

Engineering Contradiction:
Improvehydraulic oil temperatureVSAvoiddamage vulnerability
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The cooling device is integrated into the tank structure, eliminating external hoses and pipelines that are vulnerable to damage. The unified structure removes the weak links in the system, thereby improving reliability while maintaining the cooling function.

Inventive Principle:
Principle #5Merging (Combining)

4Ease of manufacture

If cooling device is positioned outside the tank, then installation is simple, but protection against damage is insufficient

Engineering Contradiction:
Improveinstallation simplicityVSAvoidprotection against damage
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The cooling device is integrated into the tank structure, which naturally provides protection against damage from stone chipping, foreign bodies, and corrosion. The tank's structural integrity serves as protective housing for the cooling device, eliminating the need for separate protective housings while simplifying the overall design.

Inventive Principle:
Principle #5Merging (Combining)

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 allows for efficient, space-saving cooling of hydraulic oil within the tank, protecting the cooling device from damage and ensuring continuous operation, while avoiding backpressure and enhancing cooling capacity.

Implementation Method 1

the cooling device includes a heat exchanger. In this case, the heat exchanger can be designed, for example, as a cooling register

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

efficient cooling of the hydraulic oil

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP3327296B1Hydraulic oil tank with integrated cooling
Publication Date: 2019.07.24 STEINPARZER WALTER
  • EP3327296B1 patent drawingFigure 1~2
  • EP3327296B1 patent drawingFigure 3~4

AI summary

The invention relates to a tank (1) for a liquid, in particular a hydraulic oil, wherein the liquid can be drawn from and returned to the tank (1), and wherein a cooling device (2) is provided in the tank (1). The invention further relates to a use of such a tank (1). In addition, the invention relates to a device with such a tank (1) in a hydraulic system for cooling an oil. Furthermore, the invention relates to a method for temperature control of a liquid, wherein a liquid is drawn from a tank (1) and subsequently returned to the tank (1), wherein the liquid is drawn into a region (A) of the tank (1) and then, through at least one cooling device (2) and/or at least one valve (4), into a further region (B) of the tank (1).