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US 9,925,633 B2Granted
Apparatus for cooling machine components using phase-change material
AssigneeStep-Tec AG
InventorsLukas Weiss, Simon Zuest, Ludger Josef Fischer, Joerg Worlitschek, Edwin Reinhard
Life of this patent
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Abstract
The invention relates, on the one hand, to a machine element (6), for example a motor spindle or an electromechanical drive unit, with integrated, internal cooling system (8) and, on the other hand, to a closed cooling circuit (24) with corresponding machine element (6). According to the invention, the cooling takes place with a special coolant (4). The coolant (4) is a dispersion containing at least one Phase Change Material (PCM).
Claims24
A machine element for performing work on a workpiece, comprising:
- the machine element having various components therein with a desired target operating temperature;
- a heat source;
- and
- an integrated closed loop internal cooling system having a dispersion unit connected downstream from the machine element for cooling the heat source using a coolant flowing throughout the closed loop system and through cooling lines in the machine element, the machine element having at least one coolant inflow and at least one coolant outflow,
- wherein the coolant is a dispersion including at least one Phase Change Material (PCM) having a phase transition temperature at the desired target operating temperature, and
- wherein the integrated close loop internal cooling system is designed such that the cooling system, in a lower and medium performance range of the machine element, provides a cooling of the machine element to the desired target operating temperature, which is in the solid-liquid phase transition temperature range of the Phase Change Material (PCM) contained in the coolant, and if the medium performance range of the machine element is exceeded, the cooling system cools the machine element by warming the coolant above the phase transition temperature range.
3 more elements
Apparatus for performing work on a workpiece, comprising:
- a machine element having various components therein with a desired target operating temperature;
- a closed loop cooling system for maintaining the machine element at the target temperature,
- said closed loop cooling system having cooling lines flowing through:
- the machine element;
- a heat sink;
- a dispersion unit connected downstream from the machine element and in between the machine element and the heat sink;
- and
- a pump;
- a dispersion in the cooling lines, the dispersion including at least one Phase Change Material (PCM) having a phase transition temperature at the desired target operating temperature;
- and
- a temperature sensor for sensing the temperature of the dispersion in the heat sink, the heat sink being activated or deactivated as a function of the temperature sensed by the temperature sensor,
- wherein the PCM changes from a solid to liquid or from liquid to solid at the phase transition temperature, depending on the operating condition of the machine element, to maintain the components therein at the desired operating temperature.
9 more elements
Dependencies are inferred from the claim text.