ECCENTRIC SCREW PUMP

• US 20190316583A1
• Filed: 11/09/2016
• Published: 10/17/2019
• Est. Priority Date: 11/10/2016
• Status: Active Grant

• Current Assignee: Seepex GmbH (Ingersoll Rand, Inc.)
• Original Assignee: Seepex GmbH (Ingersoll Rand, Inc.)
• Inventors: DICKS, Norman, GOETHEL, Stefan, GRIESDORN, Marcel, MCGARIAN, Peter, OVERMEIER, Dirk, RYVKIN, Vsevolod
• Granted Patent: US 11,378,078 B2
• Time in Patent Office: Days
• CPC Class Codes: F04C 11/006 having complementary function
• CPC Class Codes: F04C 15/0061 Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
• CPC Class Codes: F04C 2/1073 where one member is stationary while the other member rotates and orbits
• CPC Class Codes: F04C 2230/60 Assembly methods
• CPC Class Codes: F04C 2230/80 Repairing methods
• CPC Class Codes: F04C 2230/85 Methods for improvement by repair or exchange of parts
• CPC Class Codes: F04C 2240/30 Casings or housings

Abstract

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.

Claims

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 at least one intake port or output port for 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 in the drive-connection housing and connected to the drive shaft of the drive,

a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling,

a drive-side housing connector connected between the pump housing and the drive-connection housing and surrounding the drive-side coupling, and

a stator-side housing connector connected to the stator, the drive-side housing connector is disassemblable in such a manner that the drive-side coupling can be exposed for maintenance or disassembly.

2. The pump according to claim 1, wherein the drive-side housing connector can be disassembled in such a manner that the drive-side coupling is no longer surrounded by the drive-side housing connector all around the housing connector.

3. The pump according to claim 2, wherein the drive-side housing connector can be disassembled in such a manner that the drive-side coupling is fully exposed in the coupling region.

4. The pump according to claim 1, wherein the drive-connection housing is pivotal about a vertical axis of rotation relative to base plane of the pump in the assembled state of the pump housing and when the drive-side housing connector is disassembled.

5. The pump according to claim 1, wherein the drive-side housing connector has a fixed first section and a second movable section that is displaceable axially toward the intake or output port of the pump housing onto the first section.

6. The pump according to claim 1, wherein the intake port is formed by an inflow funnel.

7. The pump according to claim 1, wherein the coupling rod is provided with an auger attached to an outer surface of the coupling rod.

8. The pump according to claim 5, wherein the second movable section is sealed relative to the fixed first section with at least one seal.

9. The pump according to one of claims 3 to 8, claim 5, wherein the second movable section is tubular and essentially cylindrical.

10. The pump according to claim 1, wherein the coupling rod is supported to prevent it from being lowered and/or to prevent displacement during disassembly of the drive-side housing connector.

11. The pump according to claim 10, claim 10, wherein the coupling rod is supported by the second movable section.

12. The pump according to claim 10, 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.

13. The pump according to claim 12, wherein the coupling rod is supported in the hole at least during disassembly of the drive-side housing connector.

14. The pump according to claim 12, wherein the partition wall is provided in a fixed first section of the drive-side housing connector.

15. The pump according to claim 12, wherein the coupling rod is supported in the hole by a seal.

16. The pump according to claim 1, wherein the second section is provided with one or with multiple flush fittings.

17. An eccentric screw pump comprising:

a base;

a stator on the base;

a rotor rotatable in the stator about an axis;

a drive for rotating the rotor about the axis;

a pump housing on the base between the drive and the stator and forming an intake or output port for a medium to be conveyed;

a drive-connection housing fixed on the base and extending from the drive toward the pump housing;

a drive shaft extending from the drive into the drive-connection housing;

a drive-side coupling in the drive-connection housing and connected to the drive shaft of the drive;

a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling;

a stator-side housing connector on the base and connected between the stator and the pump housing;

a drive-side housing connector connected between the pump housing and the drive-connection housing and having parts movable between a closed position surrounding and containing the drive-side coupling and an open position exposing the drive-side coupling; and

a pivot supporting the drive-connection housing on the base for pivotal movement in the open position of the drive-side housing from a use position supporting the drive-side coupling and the drive shaft in line between the drive and the coupling rod and a maintenance position with the drive-side coupling and drive shaft projecting laterally from the axis.

18. 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 intake port or output port for 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 in the drive-connection housing and connected to the drive shaft of the drive;

a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling;

a drive-side housing connector connected between the pump housing and the drive-connection housing and surrounding the drive-side coupling; and

a stator-side housing connector connected to the stator;

the drive-side housing connector being disassemblable in such a manner that the drive-side coupling can be exposed for maintenance or disassembly;

a support engageable with the coupling rod to prevent the coupling rod from being lowered or displaced during disassembly of the drive-side housing connector.

19. The eccentric screw pump defined in claim 18, wherein the support is a movable section of the drive-side housing connector.