Eccentric screw pump

An eccentric screw pump, comprising:

• a rotor which extends along a longitudinal axis of the rotor from a drive end to a free end;
• a stator housing with an interior space which extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and is designed to accommodate the rotor;
• a drive motor with a drive shaft which is coupled with the rotor to transmit a torque;
• a first cardan joint which is placed between the drive shaft and the rotor;
• and
• a stator outlet flange which is arranged in a direction of flow behind the rotor,
• wherein the longitudinal axis runs through the stator outlet flange and the stator outlet flange comprises a flange connection plane that is not oriented vertically to the longitudinal axis.

An eccentric screw pump comprising:

• a rotor which extends along a longitudinal axis of the rotor from a drive end to a free end;
• a stator housing with an interior space which extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and is designed to accommodate the rotor;
• a drive motor with a drive shaft which is coupled with the rotor to transmit a torque;
• a first cardan joint which is placed between the drive shaft and the rotor;
• and
• a stator outlet flange which is arranged in a direction of flow behind the rotor,
• wherein the rotor is connected to the first cardan joint by means of a first shaft-hub connection,
• wherein the rotor comprises a cavity that extends along the longitudinal axis,
• wherein a first tensioning element, which is connected with a first shaft-hub connection on a side of the stator inlet opening, extends through this cavity and can be actuated with a tool on a side of the stator outlet opening or can be actuated by means of a tool that extends through this cavity, and
• wherein the first shaft-hub connection can be connected and separated from the side of the stator outlet opening by means of the tool placed on the first tensioning element.

An eccentric screw pump comprising:

• a rotor which extends along a longitudinal axis of the rotor from a drive end to a free end;
• a stator housing with an interior space which extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and is designed to accommodate the rotor;
• a drive motor with a drive shaft which is coupled with the rotor to transmit a torque;
• a first cardan joint which is placed between the drive shaft and the rotor;
• and
• a stator outlet flange which is arranged in a direction of flow behind the rotor,
• wherein the first cardan joint is connected to a wobble shaft which is connected to a second cardan joint which is coupled with a hollow shaft coupled with the drive motor by means of a second shaft-hub connection,
• wherein the second shaft-hub connection can be connected and separated by means of a second tensioning element,
• wherein:
• the second tensioning element extends through the hollow shaft, is connected to the second shaft-hub connection on a side of the second cardan joint, and can be actuated with a tool on a side of the hollow shaft that is opposite from the second cardan joint, or
• the second tensioning element can be actuated by means of a tool extending through the hollow shaft, and
• wherein the second shaft-hub connection can be connected or separated from a side of the hollow shaft that is opposite from the second cardan joint by means of the tool placed on the second tensioning element.

A method for maintaining an eccentric screw pump, the method comprising:

• separating a stator outlet flange connection of a stator housing in an area of a stator outlet opening of the stator housing of the eccentric screw pump, wherein the stator outlet flange connection comprises a flange connection area which is tilted at an angle of less than 90° to a longitudinal axis of the stator housing;
• separating a stator inlet flange connection of the stator housing, which is arranged in the area of a stator inlet opening of the stator housing;
• and
• swiveling a rotor arranged inside the stator housing about an articulated axis of a cardan joint, which is coupled with the rotor arranged inside the stator housing and arranged in the area of the stator outlet flange connection.

An eccentric screw pump, comprising:

• a rotor which extends along a longitudinal axis of the rotor from a drive end to a free end;
• a stator housing with an interior space which extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and is designed to accommodate the rotor;
• a drive motor with a drive shaft which is coupled with the rotor to transmit a torque;
• a first cardan joint which is placed between the drive shaft and the rotor;
• and
• a stator inlet flange which is arranged in a direction of flow in an area of or in front of the stator inlet opening,
• wherein the longitudinal axis runs through the stator inlet flange and stator inlet flange comprises a flange connection plane that is not oriented vertically to the longitudinal axis.