Cooling for a screw pump

Abstract

The invention relates to the cooling for a screw pump for the delivery and compression of gases, wherein the rotors (1) have previously known internal cooling (7). In order to increase the operational reliability and improve the application-specific adaptation, and also in order to reduce the noise, according to the invention the coolant, preferably oil, is not only continuously introduced to the two coolant supplies (21) for internal rotor cooling (7) by way of the coolant pump (10), but the coolant is also continually delivered through the flow chambers (11) in the pump housing (2) and dissipates the heat thereof by way of the coolant pump (10), the cooling air flow over the screw pump is eliminated, the entire machine is preferably enclosed with a noise absorbing material (15), and the heat dissipation for the coolant is carried out by way of a dedicated heat exchanger (16), preferably a separate standard industry oil cooler, either water-cooled or designed as a sufficiently known oil / air cooler, wherein in order to further reduce the noise the necessary cooling fan (14) for said oil / air heat exchanger (16) runs at a reduced rotational speed in that the belt drive (18) between the driving motor (17) and the pump drive shaft (6) is designed such that the driving motor (17) rotates at a lower rotational speed than the pump drive shaft (6), wherein the temperature level of the screw pump can be set in a targeted manner by simple dimensioning of the dedicated heat exchanger accordingly, and the user is additionally provided with the possibility of specifically defining the direction of the heat dissipation by the ability to freely position the heat exchanger (16) and corresponding connecting lines (13 and 19); for the coolant between said dedicated coolant heat exchanger and the screw pump.

Description

Background technique [0001] Pumps for dry compression are gaining in particular importance in vacuum technology, because due to the increased obligations imposed by environmental protection regulations and the ever-increasing operating costs and waste disposal costs as well as increased requirements for cleaning the conveyed medium, the known pumping Wet vacuum systems such as liquid ring machines and vane pumps are increasingly being replaced by dry compression pumps. Machines belonging to this type of dry compression are screw pumps, claw pumps, diaphragm pumps, piston pumps, roller machines and rocker piston pumps. However, what these machines have in common is that, at the same time as the low price level, they still do not meet the current requirements with regard to reliability and robustness as well as structural size and weight. [0002] Herein, dry-compressing screw pumps are increasingly being used in vacuum technology because they simply achieve the vacuum as typic...

AI Technical Summary

Problems solved by technology

This safe and reliable thermal coupling between the main shaft-rotor pair and the pump casing has not been satisfactorily solved so far in the prior art

At the same time users often wish to maintain a defined temperature level in the screw pump, which has so far only been solved modestly

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