Means for delivery of flowable media

Abstract

The invention relates to a device for conveying flowable media, which comprises a motor-driven pump served for forming a component of a piping system. The pump comprises a housing and an inner flow path. The inner flow path consists of inner crowding-out elements and at least one heating element capable of being activated by energy supply. The heating element adopts a flat structure in the form of a self-regulating electrical resistance element with a positive temperature coefficient, namely a so-called PTC heating element. The housing is provided with a front wall, a rear wall and side walls for connecting the front wall with the rear wall. The front wall is provided with a fluid input served as the starting point of the inner flow path of the pump. The rear wall is provided with a fluid output served as the ending point of the inner flow path of the pump. The fluid input and the fluid output are placed flush with one another. The housing is provided with more than one flat outside wall section and each PTC heating element is arranged on the corresponding flat outside wall section of the housing. The outside wall sections of the housing are spatially adjacent to the inner crowding-out elements of the pump at the same height with the fluid inlet and the fluid outlet on the outside of the housing. A carrier for the PTC heating elements is provided with an aluminum sheet which adjoins the pertinent outside wall sections for heat transfer. Corresponding PTC heating elements adjoin the outside of the aluminum sheet are in a position capable of enabling heat transmission to the housing.

Description

technical field [0001] The invention relates to a device for conveying flowable media, in particular lubricants, which has a motor-driven pump forming part of a pipeline system. Background technique [0002] In known installations of this type, certain unfavorable operating conditions lead to dangers resulting in operational malfunctions, reductions in delivery performance, overloading of the pumps or complete failure. Problems of this type can arise in particular when too low an oil temperature occurs in conveying the lubricating oil in a lubricant circuit. Such operating situations occur, for example, during certain cold operating phases of installations, or in wind power plants under severe cold conditions, where the situation can last for a long time. A correspondingly severe increase in the viscosity of the lubricating oil to be conveyed leads at least to a reduction in the conveying capacity, which can lead to damage to the associated machinery or, in unfavorable case...

AI Technical Summary

Problems solved by technology

A correspondingly severe increase in the viscosity of the lubricating oil to be conveyed leads at least to a reduction in the conveying capacity, which can lead to damage to the associated machinery or, in unfavorable cases, to an overload or complete failure of the pump, which in turn leads to corresponding damage to the associated equipment. subsequent damage

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