Eccentric screw pump with telescoping housing
What is concerned is an eccentric screw pump having at least one stator ( 1 ), a rotor ( 2 ) rotating in the stator, a drive ( 3 ) for the rotor, a pump housing ( 4 ) which is connected to the stator ( 1 ) and has at least one inlet opening ( 6 ) for the medium to be conveyed, a connection housing ( 14 ) arranged between the pump housing ( 4 ) and drive ( 3 ), a connection shaft ( 9 ) which is connected to the drive ( 3 ) and is arranged at least in certain regions in the connection housing ( 14 ), and a coupling rod ( 10 ) which is arranged in the pump housing ( 4 ) and is connected to the connection shaft ( 9 ) via a drive-side joint ( 11 ) and to the rotor ( 2 ) via a rotor-side joint ( 12 ). The drive-side housing connection piece ( 16 ) can be demounted in such a way that the drive-side joint ( 11 ) can be exposed for maintenance or demounting.
1. An eccentric screw pump comprising:
a stator,
a rotor rotatable in the stator about an axis,
a drive for rotating the rotor about the axis,
a pump housing connected with the stator and having a port serving for intake or output of a medium to be conveyed,
a drive-connection housing provided between the pump housing and the drive,
a drive shaft connected with the drive and in the drive-connection housing,
a drive-side coupling connected to the drive shaft of the drive,
a rotor-side coupling connected to the rotor,
a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by the rotor-side coupling,
a drive-side housing connector connected between the pump housing and the drive-connection housing, surrounding the drive-side coupling, and having a section that is fixed and a movable section that is telescopically and axially displaceable toward the port of the pump housing and relative to the fixed section into a disassembly position with the movable section axially displaced onto or into the fixed section to fully expose the drive-side coupling for maintenance or disassembly and axially away from the port from the disassembly position into a functional position surrounding and protecting the drive-side coupling, and
a stator-side housing connector attached to the stator and supporting the coupling rod in the disassembly position of the movable section.
2. The eccentric screw pump according to claim 1 , wherein in the functional position the drive-side coupling is surrounded by the drive-side housing connector all around the drive-side housing connector.
3. The eccentric screw pump according to claim 1 , wherein in the disassembly position the drive-connection housing is pivotal about a vertical axis of rotation relative to a base plane of the eccentric screw pump.
4. The eccentric screw pump according to claim 1 , wherein the intake port is formed by an inflow funnel.
5. The eccentric screw pump according to claim 1 , wherein the coupling rod is provided with an auger attached to an outer surface of the coupling rod.
6. The eccentric screw pump according to claim 1 , wherein the movable section is sealed relative to the fixed section with at least one seal.
7. The eccentric screw pump according to claim 1 , wherein a partition wall is provided in the drive-side housing connector and separates a drive-side chamber from an interior of the pump housing, the partition wall having a hole through which the coupling rod passes.
8. The eccentric screw pump according to claim 7 , wherein the coupling rod is supported at the hole at least in the disassembly position of the drive-side housing connector.
9. The eccentric screw pump according to claim 7 , wherein the partition wall is provided in the fixed section of the drive-side housing connector.
10. The eccentric screw pump according to claim 7 , further comprising a seal in the hole supporting the coupling rod at least in the disassembly position.
11. The eccentric screw pump according to claim 1 , wherein the movable section is provided with one or more multiple flush fittings.
12. The eccentric screw pump defined in claim 1 , wherein the fixed section and the movable section of the drive-side housing connector are cylindrically tubular.
13. An eccentric screw pump comprising:
a stator;
a rotor rotatable in the stator about an axis;
a drive for rotating the rotor about the axis;
a pump housing connected with the stator and having at least one port for intake or output of a medium to be conveyed;
a drive-connection housing provided between the pump housing and the drive;
a drive shaft connected with the drive and in the drive-connection housing;
a drive-side coupling connected to the drive shaft of the drive;
a rotor-side coupling connected to the rotor;
a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by the rotor-side coupling;
a drive-side housing connector connected between the pump housing and the drive-connection housing, surrounding the drive-side coupling, and having a section that is fixed and a movable section that is telescopically and axially displaceable toward the at least one port of the pump housing into a disassembly position with the moveable section axially in or on the fixed section to fully expose the drive-side coupling and axially away from the at least one port from the disassembly position into a functional position surrounding and protecting the drive-side coupling;
a stator-side housing connector connected to the stator and the at least one port being between the drive-side housing connector and the stator-side housing connector; and
a support engaged to the coupling rod to support the coupling rod in the disassembly position of the drive-side housing connector.
14. The eccentric screw pump defined in claim 13 , wherein the support is part of the drive-side housing connector.