Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SCREW PUMP AND METHOD FOR COMPENSATING TRANSVERSE FORCES
Document Type and Number:
WIPO Patent Application WO/2014/064045
Kind Code:
A3
Abstract:
The invention relates to a method for compensating transverse forces acting on a spindle rotor (1) of a screw pump that delivers a medium to be delivered from a suction chamber (3) to a pressure chamber (5). A compensation force directed radially relative to the axis of rotation of the spindle rotor (1) acts on a sealing surface (8) of a partition wall (7) of a helical profile of the spindle rotor (1), wherein the compensation force is generated by a pressurized fluid present at the sealing surface (8) of the partition wall (7) of the spindle rotor (1) and the same pressure in absolute value is exerted on a plurality of adjacent sealing surfaces (8) in the longitudinal direction. The invention further relates to a screw pump with at least two spindle rotors (1) rotatably mounted in a delivery housing (10) between a suction chamber (3) and a pressure chamber (5) and engaging with one another to form a chamber, the spindle rotors having a spiral profile with spiral channels (6). The screw pump also has partition walls (7) delimiting the channels (6), wherein the partition walls (7) each have a sealing surface (8) sliding along an inner wall (9) of the delivery housing (10). In a region of the delivery housing (10) surrounding the spindle rotor (1) having a spiral profile with partition walls (7) and sealing surfaces (8), the screw pump has a plurality of compensation openings (13, 14, 15, 6) for a pressure fluid which are arranged a distance away from one another in the longitudinal direction and are connected to a first reservoir (21) for the pressure fluid in such a manner that the pressure fluid is present at the plurality of compensation openings (15, 16) at a first actuating pressure specified by a pressure in the reservoir (21).

Inventors:
PELZ, Peter (Lossenweg 28, Darmstadt, 64285, DE)
THURNER, Joachim (Frankensteiner Straße 15, Darmstadt, 64297, DE)
Application Number:
EP2013/071958
Publication Date:
May 01, 2014
Filing Date:
October 21, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TECHNISCHE UNIVERSITÄT DARMSTADT (Karolinenplatz 5, Darmstadt, 64289, DE)
International Classes:
F04C15/00; F04C2/16
Foreign References:
US5348453A1994-09-20
DE3546411A11987-07-02
BE452620A
DE727434C1942-11-03
AT253944B1967-04-25
Attorney, Agent or Firm:
KATSCHER HABERMANN PATENTANWÄLTE (Dolivostraße 15 A, Darmstadt, 64293, DE)
Download PDF: